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path: root/Build/source/libs/freetype2/freetype-2.6/src/truetype/ttinterp.c
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diff --git a/Build/source/libs/freetype2/freetype-2.6/src/truetype/ttinterp.c b/Build/source/libs/freetype2/freetype-2.6/src/truetype/ttinterp.c
new file mode 100644
index 00000000000..089f604b50f
--- /dev/null
+++ b/Build/source/libs/freetype2/freetype-2.6/src/truetype/ttinterp.c
@@ -0,0 +1,8285 @@
+/***************************************************************************/
+/* */
+/* ttinterp.c */
+/* */
+/* TrueType bytecode interpreter (body). */
+/* */
+/* Copyright 1996-2015 by */
+/* David Turner, Robert Wilhelm, and Werner Lemberg. */
+/* */
+/* This file is part of the FreeType project, and may only be used, */
+/* modified, and distributed under the terms of the FreeType project */
+/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
+/* this file you indicate that you have read the license and */
+/* understand and accept it fully. */
+/* */
+/***************************************************************************/
+
+
+/* Greg Hitchcock from Microsoft has helped a lot in resolving unclear */
+/* issues; many thanks! */
+
+
+#include <ft2build.h>
+#include FT_INTERNAL_DEBUG_H
+#include FT_INTERNAL_CALC_H
+#include FT_TRIGONOMETRY_H
+#include FT_SYSTEM_H
+#include FT_TRUETYPE_DRIVER_H
+
+#include "ttinterp.h"
+#include "tterrors.h"
+#include "ttsubpix.h"
+
+
+#ifdef TT_USE_BYTECODE_INTERPRETER
+
+
+ /*************************************************************************/
+ /* */
+ /* The macro FT_COMPONENT is used in trace mode. It is an implicit */
+ /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */
+ /* messages during execution. */
+ /* */
+#undef FT_COMPONENT
+#define FT_COMPONENT trace_ttinterp
+
+
+ /*************************************************************************/
+ /* */
+ /* In order to detect infinite loops in the code, we set up a counter */
+ /* within the run loop. A single stroke of interpretation is now */
+ /* limited to a maximum number of opcodes defined below. */
+ /* */
+#define MAX_RUNNABLE_OPCODES 1000000L
+
+
+#define SUBPIXEL_HINTING \
+ ( ((TT_Driver)FT_FACE_DRIVER( exc->face ))->interpreter_version == \
+ TT_INTERPRETER_VERSION_38 )
+
+
+#define PROJECT( v1, v2 ) \
+ exc->func_project( exc, (v1)->x - (v2)->x, (v1)->y - (v2)->y )
+
+#define DUALPROJ( v1, v2 ) \
+ exc->func_dualproj( exc, (v1)->x - (v2)->x, (v1)->y - (v2)->y )
+
+#define FAST_PROJECT( v ) \
+ exc->func_project( exc, (v)->x, (v)->y )
+
+#define FAST_DUALPROJ( v ) \
+ exc->func_dualproj( exc, (v)->x, (v)->y )
+
+
+ /*************************************************************************/
+ /* */
+ /* Instruction dispatch function, as used by the interpreter. */
+ /* */
+ typedef void (*TInstruction_Function)( TT_ExecContext exc,
+ FT_Long* args );
+
+
+ /*************************************************************************/
+ /* */
+ /* Two simple bounds-checking macros. */
+ /* */
+#define BOUNDS( x, n ) ( (FT_UInt)(x) >= (FT_UInt)(n) )
+#define BOUNDSL( x, n ) ( (FT_ULong)(x) >= (FT_ULong)(n) )
+
+
+ /*************************************************************************/
+ /* */
+ /* This macro computes (a*2^14)/b and complements TT_MulFix14. */
+ /* */
+#define TT_DivFix14( a, b ) FT_DivFix( a, (b) << 2 )
+
+
+#undef SUCCESS
+#define SUCCESS 0
+
+#undef FAILURE
+#define FAILURE 1
+
+#ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING
+#define GUESS_VECTOR( V ) \
+ do \
+ { \
+ if ( exc->face->unpatented_hinting ) \
+ { \
+ exc->GS.V.x = (FT_F2Dot14)( exc->GS.both_x_axis ? 0x4000 : 0 ); \
+ exc->GS.V.y = (FT_F2Dot14)( exc->GS.both_x_axis ? 0 : 0x4000 ); \
+ } \
+ } while (0)
+#else
+#define GUESS_VECTOR( V ) do { } while (0)
+#endif
+
+
+ /*************************************************************************/
+ /* */
+ /* CODERANGE FUNCTIONS */
+ /* */
+ /*************************************************************************/
+
+
+ /*************************************************************************/
+ /* */
+ /* <Function> */
+ /* TT_Goto_CodeRange */
+ /* */
+ /* <Description> */
+ /* Switches to a new code range (updates the code related elements in */
+ /* `exec', and `IP'). */
+ /* */
+ /* <Input> */
+ /* range :: The new execution code range. */
+ /* */
+ /* IP :: The new IP in the new code range. */
+ /* */
+ /* <InOut> */
+ /* exec :: The target execution context. */
+ /* */
+ FT_LOCAL_DEF( void )
+ TT_Goto_CodeRange( TT_ExecContext exec,
+ FT_Int range,
+ FT_Long IP )
+ {
+ TT_CodeRange* coderange;
+
+
+ FT_ASSERT( range >= 1 && range <= 3 );
+
+ coderange = &exec->codeRangeTable[range - 1];
+
+ FT_ASSERT( coderange->base != NULL );
+
+ /* NOTE: Because the last instruction of a program may be a CALL */
+ /* which will return to the first byte *after* the code */
+ /* range, we test for IP <= Size instead of IP < Size. */
+ /* */
+ FT_ASSERT( IP <= coderange->size );
+
+ exec->code = coderange->base;
+ exec->codeSize = coderange->size;
+ exec->IP = IP;
+ exec->curRange = range;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* <Function> */
+ /* TT_Set_CodeRange */
+ /* */
+ /* <Description> */
+ /* Sets a code range. */
+ /* */
+ /* <Input> */
+ /* range :: The code range index. */
+ /* */
+ /* base :: The new code base. */
+ /* */
+ /* length :: The range size in bytes. */
+ /* */
+ /* <InOut> */
+ /* exec :: The target execution context. */
+ /* */
+ FT_LOCAL_DEF( void )
+ TT_Set_CodeRange( TT_ExecContext exec,
+ FT_Int range,
+ void* base,
+ FT_Long length )
+ {
+ FT_ASSERT( range >= 1 && range <= 3 );
+
+ exec->codeRangeTable[range - 1].base = (FT_Byte*)base;
+ exec->codeRangeTable[range - 1].size = length;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* <Function> */
+ /* TT_Clear_CodeRange */
+ /* */
+ /* <Description> */
+ /* Clears a code range. */
+ /* */
+ /* <Input> */
+ /* range :: The code range index. */
+ /* */
+ /* <InOut> */
+ /* exec :: The target execution context. */
+ /* */
+ FT_LOCAL_DEF( void )
+ TT_Clear_CodeRange( TT_ExecContext exec,
+ FT_Int range )
+ {
+ FT_ASSERT( range >= 1 && range <= 3 );
+
+ exec->codeRangeTable[range - 1].base = NULL;
+ exec->codeRangeTable[range - 1].size = 0;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* EXECUTION CONTEXT ROUTINES */
+ /* */
+ /*************************************************************************/
+
+
+ /*************************************************************************/
+ /* */
+ /* <Function> */
+ /* TT_Done_Context */
+ /* */
+ /* <Description> */
+ /* Destroys a given context. */
+ /* */
+ /* <Input> */
+ /* exec :: A handle to the target execution context. */
+ /* */
+ /* memory :: A handle to the parent memory object. */
+ /* */
+ /* <Note> */
+ /* Only the glyph loader and debugger should call this function. */
+ /* */
+ FT_LOCAL_DEF( void )
+ TT_Done_Context( TT_ExecContext exec )
+ {
+ FT_Memory memory = exec->memory;
+
+
+ /* points zone */
+ exec->maxPoints = 0;
+ exec->maxContours = 0;
+
+ /* free stack */
+ FT_FREE( exec->stack );
+ exec->stackSize = 0;
+
+ /* free call stack */
+ FT_FREE( exec->callStack );
+ exec->callSize = 0;
+ exec->callTop = 0;
+
+ /* free glyph code range */
+ FT_FREE( exec->glyphIns );
+ exec->glyphSize = 0;
+
+ exec->size = NULL;
+ exec->face = NULL;
+
+ FT_FREE( exec );
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* <Function> */
+ /* Init_Context */
+ /* */
+ /* <Description> */
+ /* Initializes a context object. */
+ /* */
+ /* <Input> */
+ /* memory :: A handle to the parent memory object. */
+ /* */
+ /* <InOut> */
+ /* exec :: A handle to the target execution context. */
+ /* */
+ /* <Return> */
+ /* FreeType error code. 0 means success. */
+ /* */
+ static FT_Error
+ Init_Context( TT_ExecContext exec,
+ FT_Memory memory )
+ {
+ FT_Error error;
+
+
+ FT_TRACE1(( "Init_Context: new object at 0x%08p\n", exec ));
+
+ exec->memory = memory;
+ exec->callSize = 32;
+
+ if ( FT_NEW_ARRAY( exec->callStack, exec->callSize ) )
+ goto Fail_Memory;
+
+ /* all values in the context are set to 0 already, but this is */
+ /* here as a remainder */
+ exec->maxPoints = 0;
+ exec->maxContours = 0;
+
+ exec->stackSize = 0;
+ exec->glyphSize = 0;
+
+ exec->stack = NULL;
+ exec->glyphIns = NULL;
+
+ exec->face = NULL;
+ exec->size = NULL;
+
+ return FT_Err_Ok;
+
+ Fail_Memory:
+ FT_ERROR(( "Init_Context: not enough memory for %p\n", exec ));
+ TT_Done_Context( exec );
+
+ return error;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* <Function> */
+ /* Update_Max */
+ /* */
+ /* <Description> */
+ /* Checks the size of a buffer and reallocates it if necessary. */
+ /* */
+ /* <Input> */
+ /* memory :: A handle to the parent memory object. */
+ /* */
+ /* multiplier :: The size in bytes of each element in the buffer. */
+ /* */
+ /* new_max :: The new capacity (size) of the buffer. */
+ /* */
+ /* <InOut> */
+ /* size :: The address of the buffer's current size expressed */
+ /* in elements. */
+ /* */
+ /* buff :: The address of the buffer base pointer. */
+ /* */
+ /* <Return> */
+ /* FreeType error code. 0 means success. */
+ /* */
+ FT_LOCAL_DEF( FT_Error )
+ Update_Max( FT_Memory memory,
+ FT_ULong* size,
+ FT_ULong multiplier,
+ void* _pbuff,
+ FT_ULong new_max )
+ {
+ FT_Error error;
+ void** pbuff = (void**)_pbuff;
+
+
+ if ( *size < new_max )
+ {
+ if ( FT_REALLOC( *pbuff, *size * multiplier, new_max * multiplier ) )
+ return error;
+ *size = new_max;
+ }
+
+ return FT_Err_Ok;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* <Function> */
+ /* TT_Load_Context */
+ /* */
+ /* <Description> */
+ /* Prepare an execution context for glyph hinting. */
+ /* */
+ /* <Input> */
+ /* face :: A handle to the source face object. */
+ /* */
+ /* size :: A handle to the source size object. */
+ /* */
+ /* <InOut> */
+ /* exec :: A handle to the target execution context. */
+ /* */
+ /* <Return> */
+ /* FreeType error code. 0 means success. */
+ /* */
+ /* <Note> */
+ /* Only the glyph loader and debugger should call this function. */
+ /* */
+ FT_LOCAL_DEF( FT_Error )
+ TT_Load_Context( TT_ExecContext exec,
+ TT_Face face,
+ TT_Size size )
+ {
+ FT_Int i;
+ FT_ULong tmp;
+ TT_MaxProfile* maxp;
+ FT_Error error;
+
+
+ exec->face = face;
+ maxp = &face->max_profile;
+ exec->size = size;
+
+ if ( size )
+ {
+ exec->numFDefs = size->num_function_defs;
+ exec->maxFDefs = size->max_function_defs;
+ exec->numIDefs = size->num_instruction_defs;
+ exec->maxIDefs = size->max_instruction_defs;
+ exec->FDefs = size->function_defs;
+ exec->IDefs = size->instruction_defs;
+ exec->tt_metrics = size->ttmetrics;
+ exec->metrics = size->metrics;
+
+ exec->maxFunc = size->max_func;
+ exec->maxIns = size->max_ins;
+
+ for ( i = 0; i < TT_MAX_CODE_RANGES; i++ )
+ exec->codeRangeTable[i] = size->codeRangeTable[i];
+
+ /* set graphics state */
+ exec->GS = size->GS;
+
+ exec->cvtSize = size->cvt_size;
+ exec->cvt = size->cvt;
+
+ exec->storeSize = size->storage_size;
+ exec->storage = size->storage;
+
+ exec->twilight = size->twilight;
+
+ /* In case of multi-threading it can happen that the old size object */
+ /* no longer exists, thus we must clear all glyph zone references. */
+ ft_memset( &exec->zp0, 0, sizeof ( exec->zp0 ) );
+ exec->zp1 = exec->zp0;
+ exec->zp2 = exec->zp0;
+ }
+
+ /* XXX: We reserve a little more elements on the stack to deal safely */
+ /* with broken fonts like arialbs, courbs, timesbs, etc. */
+ tmp = (FT_ULong)exec->stackSize;
+ error = Update_Max( exec->memory,
+ &tmp,
+ sizeof ( FT_F26Dot6 ),
+ (void*)&exec->stack,
+ maxp->maxStackElements + 32 );
+ exec->stackSize = (FT_Long)tmp;
+ if ( error )
+ return error;
+
+ tmp = exec->glyphSize;
+ error = Update_Max( exec->memory,
+ &tmp,
+ sizeof ( FT_Byte ),
+ (void*)&exec->glyphIns,
+ maxp->maxSizeOfInstructions );
+ exec->glyphSize = (FT_UShort)tmp;
+ if ( error )
+ return error;
+
+ exec->pts.n_points = 0;
+ exec->pts.n_contours = 0;
+
+ exec->zp1 = exec->pts;
+ exec->zp2 = exec->pts;
+ exec->zp0 = exec->pts;
+
+ exec->instruction_trap = FALSE;
+
+ return FT_Err_Ok;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* <Function> */
+ /* TT_Save_Context */
+ /* */
+ /* <Description> */
+ /* Saves the code ranges in a `size' object. */
+ /* */
+ /* <Input> */
+ /* exec :: A handle to the source execution context. */
+ /* */
+ /* <InOut> */
+ /* size :: A handle to the target size object. */
+ /* */
+ /* <Note> */
+ /* Only the glyph loader and debugger should call this function. */
+ /* */
+ FT_LOCAL_DEF( void )
+ TT_Save_Context( TT_ExecContext exec,
+ TT_Size size )
+ {
+ FT_Int i;
+
+
+ /* XXX: Will probably disappear soon with all the code range */
+ /* management, which is now rather obsolete. */
+ /* */
+ size->num_function_defs = exec->numFDefs;
+ size->num_instruction_defs = exec->numIDefs;
+
+ size->max_func = exec->maxFunc;
+ size->max_ins = exec->maxIns;
+
+ for ( i = 0; i < TT_MAX_CODE_RANGES; i++ )
+ size->codeRangeTable[i] = exec->codeRangeTable[i];
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* <Function> */
+ /* TT_Run_Context */
+ /* */
+ /* <Description> */
+ /* Executes one or more instructions in the execution context. */
+ /* */
+ /* <Input> */
+ /* debug :: A Boolean flag. If set, the function sets some internal */
+ /* variables and returns immediately, otherwise TT_RunIns() */
+ /* is called. */
+ /* */
+ /* This is commented out currently. */
+ /* */
+ /* <Input> */
+ /* exec :: A handle to the target execution context. */
+ /* */
+ /* <Return> */
+ /* TrueType error code. 0 means success. */
+ /* */
+ FT_LOCAL_DEF( FT_Error )
+ TT_Run_Context( TT_ExecContext exec )
+ {
+ TT_Goto_CodeRange( exec, tt_coderange_glyph, 0 );
+
+ exec->zp0 = exec->pts;
+ exec->zp1 = exec->pts;
+ exec->zp2 = exec->pts;
+
+ exec->GS.gep0 = 1;
+ exec->GS.gep1 = 1;
+ exec->GS.gep2 = 1;
+
+ exec->GS.projVector.x = 0x4000;
+ exec->GS.projVector.y = 0x0000;
+
+ exec->GS.freeVector = exec->GS.projVector;
+ exec->GS.dualVector = exec->GS.projVector;
+
+#ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING
+ exec->GS.both_x_axis = TRUE;
+#endif
+
+ exec->GS.round_state = 1;
+ exec->GS.loop = 1;
+
+ /* some glyphs leave something on the stack. so we clean it */
+ /* before a new execution. */
+ exec->top = 0;
+ exec->callTop = 0;
+
+ return exec->face->interpreter( exec );
+ }
+
+
+ /* The default value for `scan_control' is documented as FALSE in the */
+ /* TrueType specification. This is confusing since it implies a */
+ /* Boolean value. However, this is not the case, thus both the */
+ /* default values of our `scan_type' and `scan_control' fields (which */
+ /* the documentation's `scan_control' variable is split into) are */
+ /* zero. */
+
+ const TT_GraphicsState tt_default_graphics_state =
+ {
+ 0, 0, 0,
+ { 0x4000, 0 },
+ { 0x4000, 0 },
+ { 0x4000, 0 },
+
+#ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING
+ TRUE,
+#endif
+
+ 1, 64, 1,
+ TRUE, 68, 0, 0, 9, 3,
+ 0, FALSE, 0, 1, 1, 1
+ };
+
+
+ /* documentation is in ttinterp.h */
+
+ FT_EXPORT_DEF( TT_ExecContext )
+ TT_New_Context( TT_Driver driver )
+ {
+ FT_Memory memory;
+ FT_Error error;
+
+ TT_ExecContext exec = NULL;
+
+
+ if ( !driver )
+ goto Fail;
+
+ memory = driver->root.root.memory;
+
+ /* allocate object */
+ if ( FT_NEW( exec ) )
+ goto Fail;
+
+ /* initialize it; in case of error this deallocates `exec' too */
+ error = Init_Context( exec, memory );
+ if ( error )
+ goto Fail;
+
+ return exec;
+
+ Fail:
+ return NULL;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* Before an opcode is executed, the interpreter verifies that there are */
+ /* enough arguments on the stack, with the help of the `Pop_Push_Count' */
+ /* table. */
+ /* */
+ /* For each opcode, the first column gives the number of arguments that */
+ /* are popped from the stack; the second one gives the number of those */
+ /* that are pushed in result. */
+ /* */
+ /* Opcodes which have a varying number of parameters in the data stream */
+ /* (NPUSHB, NPUSHW) are handled specially; they have a negative value in */
+ /* the `opcode_length' table, and the value in `Pop_Push_Count' is set */
+ /* to zero. */
+ /* */
+ /*************************************************************************/
+
+
+#undef PACK
+#define PACK( x, y ) ( ( x << 4 ) | y )
+
+
+ static
+ const FT_Byte Pop_Push_Count[256] =
+ {
+ /* opcodes are gathered in groups of 16 */
+ /* please keep the spaces as they are */
+
+ /* SVTCA y */ PACK( 0, 0 ),
+ /* SVTCA x */ PACK( 0, 0 ),
+ /* SPvTCA y */ PACK( 0, 0 ),
+ /* SPvTCA x */ PACK( 0, 0 ),
+ /* SFvTCA y */ PACK( 0, 0 ),
+ /* SFvTCA x */ PACK( 0, 0 ),
+ /* SPvTL // */ PACK( 2, 0 ),
+ /* SPvTL + */ PACK( 2, 0 ),
+ /* SFvTL // */ PACK( 2, 0 ),
+ /* SFvTL + */ PACK( 2, 0 ),
+ /* SPvFS */ PACK( 2, 0 ),
+ /* SFvFS */ PACK( 2, 0 ),
+ /* GPv */ PACK( 0, 2 ),
+ /* GFv */ PACK( 0, 2 ),
+ /* SFvTPv */ PACK( 0, 0 ),
+ /* ISECT */ PACK( 5, 0 ),
+
+ /* SRP0 */ PACK( 1, 0 ),
+ /* SRP1 */ PACK( 1, 0 ),
+ /* SRP2 */ PACK( 1, 0 ),
+ /* SZP0 */ PACK( 1, 0 ),
+ /* SZP1 */ PACK( 1, 0 ),
+ /* SZP2 */ PACK( 1, 0 ),
+ /* SZPS */ PACK( 1, 0 ),
+ /* SLOOP */ PACK( 1, 0 ),
+ /* RTG */ PACK( 0, 0 ),
+ /* RTHG */ PACK( 0, 0 ),
+ /* SMD */ PACK( 1, 0 ),
+ /* ELSE */ PACK( 0, 0 ),
+ /* JMPR */ PACK( 1, 0 ),
+ /* SCvTCi */ PACK( 1, 0 ),
+ /* SSwCi */ PACK( 1, 0 ),
+ /* SSW */ PACK( 1, 0 ),
+
+ /* DUP */ PACK( 1, 2 ),
+ /* POP */ PACK( 1, 0 ),
+ /* CLEAR */ PACK( 0, 0 ),
+ /* SWAP */ PACK( 2, 2 ),
+ /* DEPTH */ PACK( 0, 1 ),
+ /* CINDEX */ PACK( 1, 1 ),
+ /* MINDEX */ PACK( 1, 0 ),
+ /* AlignPTS */ PACK( 2, 0 ),
+ /* INS_$28 */ PACK( 0, 0 ),
+ /* UTP */ PACK( 1, 0 ),
+ /* LOOPCALL */ PACK( 2, 0 ),
+ /* CALL */ PACK( 1, 0 ),
+ /* FDEF */ PACK( 1, 0 ),
+ /* ENDF */ PACK( 0, 0 ),
+ /* MDAP[0] */ PACK( 1, 0 ),
+ /* MDAP[1] */ PACK( 1, 0 ),
+
+ /* IUP[0] */ PACK( 0, 0 ),
+ /* IUP[1] */ PACK( 0, 0 ),
+ /* SHP[0] */ PACK( 0, 0 ),
+ /* SHP[1] */ PACK( 0, 0 ),
+ /* SHC[0] */ PACK( 1, 0 ),
+ /* SHC[1] */ PACK( 1, 0 ),
+ /* SHZ[0] */ PACK( 1, 0 ),
+ /* SHZ[1] */ PACK( 1, 0 ),
+ /* SHPIX */ PACK( 1, 0 ),
+ /* IP */ PACK( 0, 0 ),
+ /* MSIRP[0] */ PACK( 2, 0 ),
+ /* MSIRP[1] */ PACK( 2, 0 ),
+ /* AlignRP */ PACK( 0, 0 ),
+ /* RTDG */ PACK( 0, 0 ),
+ /* MIAP[0] */ PACK( 2, 0 ),
+ /* MIAP[1] */ PACK( 2, 0 ),
+
+ /* NPushB */ PACK( 0, 0 ),
+ /* NPushW */ PACK( 0, 0 ),
+ /* WS */ PACK( 2, 0 ),
+ /* RS */ PACK( 1, 1 ),
+ /* WCvtP */ PACK( 2, 0 ),
+ /* RCvt */ PACK( 1, 1 ),
+ /* GC[0] */ PACK( 1, 1 ),
+ /* GC[1] */ PACK( 1, 1 ),
+ /* SCFS */ PACK( 2, 0 ),
+ /* MD[0] */ PACK( 2, 1 ),
+ /* MD[1] */ PACK( 2, 1 ),
+ /* MPPEM */ PACK( 0, 1 ),
+ /* MPS */ PACK( 0, 1 ),
+ /* FlipON */ PACK( 0, 0 ),
+ /* FlipOFF */ PACK( 0, 0 ),
+ /* DEBUG */ PACK( 1, 0 ),
+
+ /* LT */ PACK( 2, 1 ),
+ /* LTEQ */ PACK( 2, 1 ),
+ /* GT */ PACK( 2, 1 ),
+ /* GTEQ */ PACK( 2, 1 ),
+ /* EQ */ PACK( 2, 1 ),
+ /* NEQ */ PACK( 2, 1 ),
+ /* ODD */ PACK( 1, 1 ),
+ /* EVEN */ PACK( 1, 1 ),
+ /* IF */ PACK( 1, 0 ),
+ /* EIF */ PACK( 0, 0 ),
+ /* AND */ PACK( 2, 1 ),
+ /* OR */ PACK( 2, 1 ),
+ /* NOT */ PACK( 1, 1 ),
+ /* DeltaP1 */ PACK( 1, 0 ),
+ /* SDB */ PACK( 1, 0 ),
+ /* SDS */ PACK( 1, 0 ),
+
+ /* ADD */ PACK( 2, 1 ),
+ /* SUB */ PACK( 2, 1 ),
+ /* DIV */ PACK( 2, 1 ),
+ /* MUL */ PACK( 2, 1 ),
+ /* ABS */ PACK( 1, 1 ),
+ /* NEG */ PACK( 1, 1 ),
+ /* FLOOR */ PACK( 1, 1 ),
+ /* CEILING */ PACK( 1, 1 ),
+ /* ROUND[0] */ PACK( 1, 1 ),
+ /* ROUND[1] */ PACK( 1, 1 ),
+ /* ROUND[2] */ PACK( 1, 1 ),
+ /* ROUND[3] */ PACK( 1, 1 ),
+ /* NROUND[0] */ PACK( 1, 1 ),
+ /* NROUND[1] */ PACK( 1, 1 ),
+ /* NROUND[2] */ PACK( 1, 1 ),
+ /* NROUND[3] */ PACK( 1, 1 ),
+
+ /* WCvtF */ PACK( 2, 0 ),
+ /* DeltaP2 */ PACK( 1, 0 ),
+ /* DeltaP3 */ PACK( 1, 0 ),
+ /* DeltaCn[0] */ PACK( 1, 0 ),
+ /* DeltaCn[1] */ PACK( 1, 0 ),
+ /* DeltaCn[2] */ PACK( 1, 0 ),
+ /* SROUND */ PACK( 1, 0 ),
+ /* S45Round */ PACK( 1, 0 ),
+ /* JROT */ PACK( 2, 0 ),
+ /* JROF */ PACK( 2, 0 ),
+ /* ROFF */ PACK( 0, 0 ),
+ /* INS_$7B */ PACK( 0, 0 ),
+ /* RUTG */ PACK( 0, 0 ),
+ /* RDTG */ PACK( 0, 0 ),
+ /* SANGW */ PACK( 1, 0 ),
+ /* AA */ PACK( 1, 0 ),
+
+ /* FlipPT */ PACK( 0, 0 ),
+ /* FlipRgON */ PACK( 2, 0 ),
+ /* FlipRgOFF */ PACK( 2, 0 ),
+ /* INS_$83 */ PACK( 0, 0 ),
+ /* INS_$84 */ PACK( 0, 0 ),
+ /* ScanCTRL */ PACK( 1, 0 ),
+ /* SDPvTL[0] */ PACK( 2, 0 ),
+ /* SDPvTL[1] */ PACK( 2, 0 ),
+ /* GetINFO */ PACK( 1, 1 ),
+ /* IDEF */ PACK( 1, 0 ),
+ /* ROLL */ PACK( 3, 3 ),
+ /* MAX */ PACK( 2, 1 ),
+ /* MIN */ PACK( 2, 1 ),
+ /* ScanTYPE */ PACK( 1, 0 ),
+ /* InstCTRL */ PACK( 2, 0 ),
+ /* INS_$8F */ PACK( 0, 0 ),
+
+ /* INS_$90 */ PACK( 0, 0 ),
+ /* INS_$91 */ PACK( 0, 0 ),
+ /* INS_$92 */ PACK( 0, 0 ),
+ /* INS_$93 */ PACK( 0, 0 ),
+ /* INS_$94 */ PACK( 0, 0 ),
+ /* INS_$95 */ PACK( 0, 0 ),
+ /* INS_$96 */ PACK( 0, 0 ),
+ /* INS_$97 */ PACK( 0, 0 ),
+ /* INS_$98 */ PACK( 0, 0 ),
+ /* INS_$99 */ PACK( 0, 0 ),
+ /* INS_$9A */ PACK( 0, 0 ),
+ /* INS_$9B */ PACK( 0, 0 ),
+ /* INS_$9C */ PACK( 0, 0 ),
+ /* INS_$9D */ PACK( 0, 0 ),
+ /* INS_$9E */ PACK( 0, 0 ),
+ /* INS_$9F */ PACK( 0, 0 ),
+
+ /* INS_$A0 */ PACK( 0, 0 ),
+ /* INS_$A1 */ PACK( 0, 0 ),
+ /* INS_$A2 */ PACK( 0, 0 ),
+ /* INS_$A3 */ PACK( 0, 0 ),
+ /* INS_$A4 */ PACK( 0, 0 ),
+ /* INS_$A5 */ PACK( 0, 0 ),
+ /* INS_$A6 */ PACK( 0, 0 ),
+ /* INS_$A7 */ PACK( 0, 0 ),
+ /* INS_$A8 */ PACK( 0, 0 ),
+ /* INS_$A9 */ PACK( 0, 0 ),
+ /* INS_$AA */ PACK( 0, 0 ),
+ /* INS_$AB */ PACK( 0, 0 ),
+ /* INS_$AC */ PACK( 0, 0 ),
+ /* INS_$AD */ PACK( 0, 0 ),
+ /* INS_$AE */ PACK( 0, 0 ),
+ /* INS_$AF */ PACK( 0, 0 ),
+
+ /* PushB[0] */ PACK( 0, 1 ),
+ /* PushB[1] */ PACK( 0, 2 ),
+ /* PushB[2] */ PACK( 0, 3 ),
+ /* PushB[3] */ PACK( 0, 4 ),
+ /* PushB[4] */ PACK( 0, 5 ),
+ /* PushB[5] */ PACK( 0, 6 ),
+ /* PushB[6] */ PACK( 0, 7 ),
+ /* PushB[7] */ PACK( 0, 8 ),
+ /* PushW[0] */ PACK( 0, 1 ),
+ /* PushW[1] */ PACK( 0, 2 ),
+ /* PushW[2] */ PACK( 0, 3 ),
+ /* PushW[3] */ PACK( 0, 4 ),
+ /* PushW[4] */ PACK( 0, 5 ),
+ /* PushW[5] */ PACK( 0, 6 ),
+ /* PushW[6] */ PACK( 0, 7 ),
+ /* PushW[7] */ PACK( 0, 8 ),
+
+ /* MDRP[00] */ PACK( 1, 0 ),
+ /* MDRP[01] */ PACK( 1, 0 ),
+ /* MDRP[02] */ PACK( 1, 0 ),
+ /* MDRP[03] */ PACK( 1, 0 ),
+ /* MDRP[04] */ PACK( 1, 0 ),
+ /* MDRP[05] */ PACK( 1, 0 ),
+ /* MDRP[06] */ PACK( 1, 0 ),
+ /* MDRP[07] */ PACK( 1, 0 ),
+ /* MDRP[08] */ PACK( 1, 0 ),
+ /* MDRP[09] */ PACK( 1, 0 ),
+ /* MDRP[10] */ PACK( 1, 0 ),
+ /* MDRP[11] */ PACK( 1, 0 ),
+ /* MDRP[12] */ PACK( 1, 0 ),
+ /* MDRP[13] */ PACK( 1, 0 ),
+ /* MDRP[14] */ PACK( 1, 0 ),
+ /* MDRP[15] */ PACK( 1, 0 ),
+
+ /* MDRP[16] */ PACK( 1, 0 ),
+ /* MDRP[17] */ PACK( 1, 0 ),
+ /* MDRP[18] */ PACK( 1, 0 ),
+ /* MDRP[19] */ PACK( 1, 0 ),
+ /* MDRP[20] */ PACK( 1, 0 ),
+ /* MDRP[21] */ PACK( 1, 0 ),
+ /* MDRP[22] */ PACK( 1, 0 ),
+ /* MDRP[23] */ PACK( 1, 0 ),
+ /* MDRP[24] */ PACK( 1, 0 ),
+ /* MDRP[25] */ PACK( 1, 0 ),
+ /* MDRP[26] */ PACK( 1, 0 ),
+ /* MDRP[27] */ PACK( 1, 0 ),
+ /* MDRP[28] */ PACK( 1, 0 ),
+ /* MDRP[29] */ PACK( 1, 0 ),
+ /* MDRP[30] */ PACK( 1, 0 ),
+ /* MDRP[31] */ PACK( 1, 0 ),
+
+ /* MIRP[00] */ PACK( 2, 0 ),
+ /* MIRP[01] */ PACK( 2, 0 ),
+ /* MIRP[02] */ PACK( 2, 0 ),
+ /* MIRP[03] */ PACK( 2, 0 ),
+ /* MIRP[04] */ PACK( 2, 0 ),
+ /* MIRP[05] */ PACK( 2, 0 ),
+ /* MIRP[06] */ PACK( 2, 0 ),
+ /* MIRP[07] */ PACK( 2, 0 ),
+ /* MIRP[08] */ PACK( 2, 0 ),
+ /* MIRP[09] */ PACK( 2, 0 ),
+ /* MIRP[10] */ PACK( 2, 0 ),
+ /* MIRP[11] */ PACK( 2, 0 ),
+ /* MIRP[12] */ PACK( 2, 0 ),
+ /* MIRP[13] */ PACK( 2, 0 ),
+ /* MIRP[14] */ PACK( 2, 0 ),
+ /* MIRP[15] */ PACK( 2, 0 ),
+
+ /* MIRP[16] */ PACK( 2, 0 ),
+ /* MIRP[17] */ PACK( 2, 0 ),
+ /* MIRP[18] */ PACK( 2, 0 ),
+ /* MIRP[19] */ PACK( 2, 0 ),
+ /* MIRP[20] */ PACK( 2, 0 ),
+ /* MIRP[21] */ PACK( 2, 0 ),
+ /* MIRP[22] */ PACK( 2, 0 ),
+ /* MIRP[23] */ PACK( 2, 0 ),
+ /* MIRP[24] */ PACK( 2, 0 ),
+ /* MIRP[25] */ PACK( 2, 0 ),
+ /* MIRP[26] */ PACK( 2, 0 ),
+ /* MIRP[27] */ PACK( 2, 0 ),
+ /* MIRP[28] */ PACK( 2, 0 ),
+ /* MIRP[29] */ PACK( 2, 0 ),
+ /* MIRP[30] */ PACK( 2, 0 ),
+ /* MIRP[31] */ PACK( 2, 0 )
+ };
+
+
+#ifdef FT_DEBUG_LEVEL_TRACE
+
+ /* the first hex digit gives the length of the opcode name; the space */
+ /* after the digit is here just to increase readability of the source */
+ /* code */
+
+ static
+ const char* const opcode_name[256] =
+ {
+ "7 SVTCA y",
+ "7 SVTCA x",
+ "8 SPvTCA y",
+ "8 SPvTCA x",
+ "8 SFvTCA y",
+ "8 SFvTCA x",
+ "8 SPvTL ||",
+ "7 SPvTL +",
+ "8 SFvTL ||",
+ "7 SFvTL +",
+ "5 SPvFS",
+ "5 SFvFS",
+ "3 GPv",
+ "3 GFv",
+ "6 SFvTPv",
+ "5 ISECT",
+
+ "4 SRP0",
+ "4 SRP1",
+ "4 SRP2",
+ "4 SZP0",
+ "4 SZP1",
+ "4 SZP2",
+ "4 SZPS",
+ "5 SLOOP",
+ "3 RTG",
+ "4 RTHG",
+ "3 SMD",
+ "4 ELSE",
+ "4 JMPR",
+ "6 SCvTCi",
+ "5 SSwCi",
+ "3 SSW",
+
+ "3 DUP",
+ "3 POP",
+ "5 CLEAR",
+ "4 SWAP",
+ "5 DEPTH",
+ "6 CINDEX",
+ "6 MINDEX",
+ "8 AlignPTS",
+ "7 INS_$28",
+ "3 UTP",
+ "8 LOOPCALL",
+ "4 CALL",
+ "4 FDEF",
+ "4 ENDF",
+ "7 MDAP[0]",
+ "7 MDAP[1]",
+
+ "6 IUP[0]",
+ "6 IUP[1]",
+ "6 SHP[0]",
+ "6 SHP[1]",
+ "6 SHC[0]",
+ "6 SHC[1]",
+ "6 SHZ[0]",
+ "6 SHZ[1]",
+ "5 SHPIX",
+ "2 IP",
+ "8 MSIRP[0]",
+ "8 MSIRP[1]",
+ "7 AlignRP",
+ "4 RTDG",
+ "7 MIAP[0]",
+ "7 MIAP[1]",
+
+ "6 NPushB",
+ "6 NPushW",
+ "2 WS",
+ "2 RS",
+ "5 WCvtP",
+ "4 RCvt",
+ "5 GC[0]",
+ "5 GC[1]",
+ "4 SCFS",
+ "5 MD[0]",
+ "5 MD[1]",
+ "5 MPPEM",
+ "3 MPS",
+ "6 FlipON",
+ "7 FlipOFF",
+ "5 DEBUG",
+
+ "2 LT",
+ "4 LTEQ",
+ "2 GT",
+ "4 GTEQ",
+ "2 EQ",
+ "3 NEQ",
+ "3 ODD",
+ "4 EVEN",
+ "2 IF",
+ "3 EIF",
+ "3 AND",
+ "2 OR",
+ "3 NOT",
+ "7 DeltaP1",
+ "3 SDB",
+ "3 SDS",
+
+ "3 ADD",
+ "3 SUB",
+ "3 DIV",
+ "3 MUL",
+ "3 ABS",
+ "3 NEG",
+ "5 FLOOR",
+ "7 CEILING",
+ "8 ROUND[0]",
+ "8 ROUND[1]",
+ "8 ROUND[2]",
+ "8 ROUND[3]",
+ "9 NROUND[0]",
+ "9 NROUND[1]",
+ "9 NROUND[2]",
+ "9 NROUND[3]",
+
+ "5 WCvtF",
+ "7 DeltaP2",
+ "7 DeltaP3",
+ "A DeltaCn[0]",
+ "A DeltaCn[1]",
+ "A DeltaCn[2]",
+ "6 SROUND",
+ "8 S45Round",
+ "4 JROT",
+ "4 JROF",
+ "4 ROFF",
+ "7 INS_$7B",
+ "4 RUTG",
+ "4 RDTG",
+ "5 SANGW",
+ "2 AA",
+
+ "6 FlipPT",
+ "8 FlipRgON",
+ "9 FlipRgOFF",
+ "7 INS_$83",
+ "7 INS_$84",
+ "8 ScanCTRL",
+ "9 SDPvTL[0]",
+ "9 SDPvTL[1]",
+ "7 GetINFO",
+ "4 IDEF",
+ "4 ROLL",
+ "3 MAX",
+ "3 MIN",
+ "8 ScanTYPE",
+ "8 InstCTRL",
+ "7 INS_$8F",
+
+ "7 INS_$90",
+ "7 INS_$91",
+ "7 INS_$92",
+ "7 INS_$93",
+ "7 INS_$94",
+ "7 INS_$95",
+ "7 INS_$96",
+ "7 INS_$97",
+ "7 INS_$98",
+ "7 INS_$99",
+ "7 INS_$9A",
+ "7 INS_$9B",
+ "7 INS_$9C",
+ "7 INS_$9D",
+ "7 INS_$9E",
+ "7 INS_$9F",
+
+ "7 INS_$A0",
+ "7 INS_$A1",
+ "7 INS_$A2",
+ "7 INS_$A3",
+ "7 INS_$A4",
+ "7 INS_$A5",
+ "7 INS_$A6",
+ "7 INS_$A7",
+ "7 INS_$A8",
+ "7 INS_$A9",
+ "7 INS_$AA",
+ "7 INS_$AB",
+ "7 INS_$AC",
+ "7 INS_$AD",
+ "7 INS_$AE",
+ "7 INS_$AF",
+
+ "8 PushB[0]",
+ "8 PushB[1]",
+ "8 PushB[2]",
+ "8 PushB[3]",
+ "8 PushB[4]",
+ "8 PushB[5]",
+ "8 PushB[6]",
+ "8 PushB[7]",
+ "8 PushW[0]",
+ "8 PushW[1]",
+ "8 PushW[2]",
+ "8 PushW[3]",
+ "8 PushW[4]",
+ "8 PushW[5]",
+ "8 PushW[6]",
+ "8 PushW[7]",
+
+ "8 MDRP[00]",
+ "8 MDRP[01]",
+ "8 MDRP[02]",
+ "8 MDRP[03]",
+ "8 MDRP[04]",
+ "8 MDRP[05]",
+ "8 MDRP[06]",
+ "8 MDRP[07]",
+ "8 MDRP[08]",
+ "8 MDRP[09]",
+ "8 MDRP[10]",
+ "8 MDRP[11]",
+ "8 MDRP[12]",
+ "8 MDRP[13]",
+ "8 MDRP[14]",
+ "8 MDRP[15]",
+
+ "8 MDRP[16]",
+ "8 MDRP[17]",
+ "8 MDRP[18]",
+ "8 MDRP[19]",
+ "8 MDRP[20]",
+ "8 MDRP[21]",
+ "8 MDRP[22]",
+ "8 MDRP[23]",
+ "8 MDRP[24]",
+ "8 MDRP[25]",
+ "8 MDRP[26]",
+ "8 MDRP[27]",
+ "8 MDRP[28]",
+ "8 MDRP[29]",
+ "8 MDRP[30]",
+ "8 MDRP[31]",
+
+ "8 MIRP[00]",
+ "8 MIRP[01]",
+ "8 MIRP[02]",
+ "8 MIRP[03]",
+ "8 MIRP[04]",
+ "8 MIRP[05]",
+ "8 MIRP[06]",
+ "8 MIRP[07]",
+ "8 MIRP[08]",
+ "8 MIRP[09]",
+ "8 MIRP[10]",
+ "8 MIRP[11]",
+ "8 MIRP[12]",
+ "8 MIRP[13]",
+ "8 MIRP[14]",
+ "8 MIRP[15]",
+
+ "8 MIRP[16]",
+ "8 MIRP[17]",
+ "8 MIRP[18]",
+ "8 MIRP[19]",
+ "8 MIRP[20]",
+ "8 MIRP[21]",
+ "8 MIRP[22]",
+ "8 MIRP[23]",
+ "8 MIRP[24]",
+ "8 MIRP[25]",
+ "8 MIRP[26]",
+ "8 MIRP[27]",
+ "8 MIRP[28]",
+ "8 MIRP[29]",
+ "8 MIRP[30]",
+ "8 MIRP[31]"
+ };
+
+#endif /* FT_DEBUG_LEVEL_TRACE */
+
+
+ static
+ const FT_Char opcode_length[256] =
+ {
+ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+
+ -1,-2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+
+ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+ 2, 3, 4, 5, 6, 7, 8, 9, 3, 5, 7, 9, 11,13,15,17,
+
+ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1
+ };
+
+#undef PACK
+
+
+#ifndef FT_CONFIG_OPTION_NO_ASSEMBLER
+
+#if defined( __arm__ ) && \
+ ( defined( __thumb2__ ) || !defined( __thumb__ ) )
+
+#define TT_MulFix14 TT_MulFix14_arm
+
+ static FT_Int32
+ TT_MulFix14_arm( FT_Int32 a,
+ FT_Int b )
+ {
+ FT_Int32 t, t2;
+
+
+#if defined( __CC_ARM ) || defined( __ARMCC__ )
+
+ __asm
+ {
+ smull t2, t, b, a /* (lo=t2,hi=t) = a*b */
+ mov a, t, asr #31 /* a = (hi >> 31) */
+ add a, a, #0x2000 /* a += 0x2000 */
+ adds t2, t2, a /* t2 += a */
+ adc t, t, #0 /* t += carry */
+ mov a, t2, lsr #14 /* a = t2 >> 14 */
+ orr a, a, t, lsl #18 /* a |= t << 18 */
+ }
+
+#elif defined( __GNUC__ )
+
+ __asm__ __volatile__ (
+ "smull %1, %2, %4, %3\n\t" /* (lo=%1,hi=%2) = a*b */
+ "mov %0, %2, asr #31\n\t" /* %0 = (hi >> 31) */
+#if defined( __clang__ ) && defined( __thumb2__ )
+ "add.w %0, %0, #0x2000\n\t" /* %0 += 0x2000 */
+#else
+ "add %0, %0, #0x2000\n\t" /* %0 += 0x2000 */
+#endif
+ "adds %1, %1, %0\n\t" /* %1 += %0 */
+ "adc %2, %2, #0\n\t" /* %2 += carry */
+ "mov %0, %1, lsr #14\n\t" /* %0 = %1 >> 16 */
+ "orr %0, %0, %2, lsl #18\n\t" /* %0 |= %2 << 16 */
+ : "=r"(a), "=&r"(t2), "=&r"(t)
+ : "r"(a), "r"(b)
+ : "cc" );
+
+#endif
+
+ return a;
+ }
+
+#endif /* __arm__ && ( __thumb2__ || !__thumb__ ) */
+
+#endif /* !FT_CONFIG_OPTION_NO_ASSEMBLER */
+
+
+#if defined( __GNUC__ ) && \
+ ( defined( __i386__ ) || defined( __x86_64__ ) )
+
+#define TT_MulFix14 TT_MulFix14_long_long
+
+ /* Temporarily disable the warning that C90 doesn't support `long long'. */
+#if ( __GNUC__ * 100 + __GNUC_MINOR__ ) >= 406
+#pragma GCC diagnostic push
+#endif
+#pragma GCC diagnostic ignored "-Wlong-long"
+
+ /* This is declared `noinline' because inlining the function results */
+ /* in slower code. The `pure' attribute indicates that the result */
+ /* only depends on the parameters. */
+ static __attribute__(( noinline ))
+ __attribute__(( pure )) FT_Int32
+ TT_MulFix14_long_long( FT_Int32 a,
+ FT_Int b )
+ {
+
+ long long ret = (long long)a * b;
+
+ /* The following line assumes that right shifting of signed values */
+ /* will actually preserve the sign bit. The exact behaviour is */
+ /* undefined, but this is true on x86 and x86_64. */
+ long long tmp = ret >> 63;
+
+
+ ret += 0x2000 + tmp;
+
+ return (FT_Int32)( ret >> 14 );
+ }
+
+#if ( __GNUC__ * 100 + __GNUC_MINOR__ ) >= 406
+#pragma GCC diagnostic pop
+#endif
+
+#endif /* __GNUC__ && ( __i386__ || __x86_64__ ) */
+
+
+#ifndef TT_MulFix14
+
+ /* Compute (a*b)/2^14 with maximum accuracy and rounding. */
+ /* This is optimized to be faster than calling FT_MulFix() */
+ /* for platforms where sizeof(int) == 2. */
+ static FT_Int32
+ TT_MulFix14( FT_Int32 a,
+ FT_Int b )
+ {
+ FT_Int32 sign;
+ FT_UInt32 ah, al, mid, lo, hi;
+
+
+ sign = a ^ b;
+
+ if ( a < 0 )
+ a = -a;
+ if ( b < 0 )
+ b = -b;
+
+ ah = (FT_UInt32)( ( a >> 16 ) & 0xFFFFU );
+ al = (FT_UInt32)( a & 0xFFFFU );
+
+ lo = al * b;
+ mid = ah * b;
+ hi = mid >> 16;
+ mid = ( mid << 16 ) + ( 1 << 13 ); /* rounding */
+ lo += mid;
+ if ( lo < mid )
+ hi += 1;
+
+ mid = ( lo >> 14 ) | ( hi << 18 );
+
+ return sign >= 0 ? (FT_Int32)mid : -(FT_Int32)mid;
+ }
+
+#endif /* !TT_MulFix14 */
+
+
+#if defined( __GNUC__ ) && \
+ ( defined( __i386__ ) || \
+ defined( __x86_64__ ) || \
+ defined( __arm__ ) )
+
+#define TT_DotFix14 TT_DotFix14_long_long
+
+#if ( __GNUC__ * 100 + __GNUC_MINOR__ ) >= 406
+#pragma GCC diagnostic push
+#endif
+#pragma GCC diagnostic ignored "-Wlong-long"
+
+ static __attribute__(( pure )) FT_Int32
+ TT_DotFix14_long_long( FT_Int32 ax,
+ FT_Int32 ay,
+ FT_Int bx,
+ FT_Int by )
+ {
+ /* Temporarily disable the warning that C90 doesn't support */
+ /* `long long'. */
+
+ long long temp1 = (long long)ax * bx;
+ long long temp2 = (long long)ay * by;
+
+
+ temp1 += temp2;
+ temp2 = temp1 >> 63;
+ temp1 += 0x2000 + temp2;
+
+ return (FT_Int32)( temp1 >> 14 );
+
+ }
+
+#if ( __GNUC__ * 100 + __GNUC_MINOR__ ) >= 406
+#pragma GCC diagnostic pop
+#endif
+
+#endif /* __GNUC__ && (__arm__ || __i386__ || __x86_64__) */
+
+
+#ifndef TT_DotFix14
+
+ /* compute (ax*bx+ay*by)/2^14 with maximum accuracy and rounding */
+ static FT_Int32
+ TT_DotFix14( FT_Int32 ax,
+ FT_Int32 ay,
+ FT_Int bx,
+ FT_Int by )
+ {
+ FT_Int32 m, s, hi1, hi2, hi;
+ FT_UInt32 l, lo1, lo2, lo;
+
+
+ /* compute ax*bx as 64-bit value */
+ l = (FT_UInt32)( ( ax & 0xFFFFU ) * bx );
+ m = ( ax >> 16 ) * bx;
+
+ lo1 = l + ( (FT_UInt32)m << 16 );
+ hi1 = ( m >> 16 ) + ( (FT_Int32)l >> 31 ) + ( lo1 < l );
+
+ /* compute ay*by as 64-bit value */
+ l = (FT_UInt32)( ( ay & 0xFFFFU ) * by );
+ m = ( ay >> 16 ) * by;
+
+ lo2 = l + ( (FT_UInt32)m << 16 );
+ hi2 = ( m >> 16 ) + ( (FT_Int32)l >> 31 ) + ( lo2 < l );
+
+ /* add them */
+ lo = lo1 + lo2;
+ hi = hi1 + hi2 + ( lo < lo1 );
+
+ /* divide the result by 2^14 with rounding */
+ s = hi >> 31;
+ l = lo + (FT_UInt32)s;
+ hi += s + ( l < lo );
+ lo = l;
+
+ l = lo + 0x2000U;
+ hi += ( l < lo );
+
+ return (FT_Int32)( ( (FT_UInt32)hi << 18 ) | ( l >> 14 ) );
+ }
+
+#endif /* TT_DotFix14 */
+
+
+ /*************************************************************************/
+ /* */
+ /* <Function> */
+ /* Current_Ratio */
+ /* */
+ /* <Description> */
+ /* Returns the current aspect ratio scaling factor depending on the */
+ /* projection vector's state and device resolutions. */
+ /* */
+ /* <Return> */
+ /* The aspect ratio in 16.16 format, always <= 1.0 . */
+ /* */
+ static FT_Long
+ Current_Ratio( TT_ExecContext exc )
+ {
+ if ( !exc->tt_metrics.ratio )
+ {
+#ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING
+ if ( exc->face->unpatented_hinting )
+ {
+ if ( exc->GS.both_x_axis )
+ exc->tt_metrics.ratio = exc->tt_metrics.x_ratio;
+ else
+ exc->tt_metrics.ratio = exc->tt_metrics.y_ratio;
+ }
+ else
+#endif
+ {
+ if ( exc->GS.projVector.y == 0 )
+ exc->tt_metrics.ratio = exc->tt_metrics.x_ratio;
+
+ else if ( exc->GS.projVector.x == 0 )
+ exc->tt_metrics.ratio = exc->tt_metrics.y_ratio;
+
+ else
+ {
+ FT_F26Dot6 x, y;
+
+
+ x = TT_MulFix14( exc->tt_metrics.x_ratio,
+ exc->GS.projVector.x );
+ y = TT_MulFix14( exc->tt_metrics.y_ratio,
+ exc->GS.projVector.y );
+ exc->tt_metrics.ratio = FT_Hypot( x, y );
+ }
+ }
+ }
+ return exc->tt_metrics.ratio;
+ }
+
+
+ FT_CALLBACK_DEF( FT_Long )
+ Current_Ppem( TT_ExecContext exc )
+ {
+ return exc->tt_metrics.ppem;
+ }
+
+
+ FT_CALLBACK_DEF( FT_Long )
+ Current_Ppem_Stretched( TT_ExecContext exc )
+ {
+ return FT_MulFix( exc->tt_metrics.ppem, Current_Ratio( exc ) );
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* Functions related to the control value table (CVT). */
+ /* */
+ /*************************************************************************/
+
+
+ FT_CALLBACK_DEF( FT_F26Dot6 )
+ Read_CVT( TT_ExecContext exc,
+ FT_ULong idx )
+ {
+ return exc->cvt[idx];
+ }
+
+
+ FT_CALLBACK_DEF( FT_F26Dot6 )
+ Read_CVT_Stretched( TT_ExecContext exc,
+ FT_ULong idx )
+ {
+ return FT_MulFix( exc->cvt[idx], Current_Ratio( exc ) );
+ }
+
+
+ FT_CALLBACK_DEF( void )
+ Write_CVT( TT_ExecContext exc,
+ FT_ULong idx,
+ FT_F26Dot6 value )
+ {
+ exc->cvt[idx] = value;
+ }
+
+
+ FT_CALLBACK_DEF( void )
+ Write_CVT_Stretched( TT_ExecContext exc,
+ FT_ULong idx,
+ FT_F26Dot6 value )
+ {
+ exc->cvt[idx] = FT_DivFix( value, Current_Ratio( exc ) );
+ }
+
+
+ FT_CALLBACK_DEF( void )
+ Move_CVT( TT_ExecContext exc,
+ FT_ULong idx,
+ FT_F26Dot6 value )
+ {
+ exc->cvt[idx] += value;
+ }
+
+
+ FT_CALLBACK_DEF( void )
+ Move_CVT_Stretched( TT_ExecContext exc,
+ FT_ULong idx,
+ FT_F26Dot6 value )
+ {
+ exc->cvt[idx] += FT_DivFix( value, Current_Ratio( exc ) );
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* <Function> */
+ /* GetShortIns */
+ /* */
+ /* <Description> */
+ /* Returns a short integer taken from the instruction stream at */
+ /* address IP. */
+ /* */
+ /* <Return> */
+ /* Short read at code[IP]. */
+ /* */
+ /* <Note> */
+ /* This one could become a macro. */
+ /* */
+ static FT_Short
+ GetShortIns( TT_ExecContext exc )
+ {
+ /* Reading a byte stream so there is no endianess (DaveP) */
+ exc->IP += 2;
+ return (FT_Short)( ( exc->code[exc->IP - 2] << 8 ) +
+ exc->code[exc->IP - 1] );
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* <Function> */
+ /* Ins_Goto_CodeRange */
+ /* */
+ /* <Description> */
+ /* Goes to a certain code range in the instruction stream. */
+ /* */
+ /* <Input> */
+ /* aRange :: The index of the code range. */
+ /* */
+ /* aIP :: The new IP address in the code range. */
+ /* */
+ /* <Return> */
+ /* SUCCESS or FAILURE. */
+ /* */
+ static FT_Bool
+ Ins_Goto_CodeRange( TT_ExecContext exc,
+ FT_Int aRange,
+ FT_Long aIP )
+ {
+ TT_CodeRange* range;
+
+
+ if ( aRange < 1 || aRange > 3 )
+ {
+ exc->error = FT_THROW( Bad_Argument );
+ return FAILURE;
+ }
+
+ range = &exc->codeRangeTable[aRange - 1];
+
+ if ( range->base == NULL ) /* invalid coderange */
+ {
+ exc->error = FT_THROW( Invalid_CodeRange );
+ return FAILURE;
+ }
+
+ /* NOTE: Because the last instruction of a program may be a CALL */
+ /* which will return to the first byte *after* the code */
+ /* range, we test for aIP <= Size, instead of aIP < Size. */
+
+ if ( aIP > range->size )
+ {
+ exc->error = FT_THROW( Code_Overflow );
+ return FAILURE;
+ }
+
+ exc->code = range->base;
+ exc->codeSize = range->size;
+ exc->IP = aIP;
+ exc->curRange = aRange;
+
+ return SUCCESS;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* <Function> */
+ /* Direct_Move */
+ /* */
+ /* <Description> */
+ /* Moves a point by a given distance along the freedom vector. The */
+ /* point will be `touched'. */
+ /* */
+ /* <Input> */
+ /* point :: The index of the point to move. */
+ /* */
+ /* distance :: The distance to apply. */
+ /* */
+ /* <InOut> */
+ /* zone :: The affected glyph zone. */
+ /* */
+ static void
+ Direct_Move( TT_ExecContext exc,
+ TT_GlyphZone zone,
+ FT_UShort point,
+ FT_F26Dot6 distance )
+ {
+ FT_F26Dot6 v;
+
+
+#ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING
+ FT_ASSERT( !exc->face->unpatented_hinting );
+#endif
+
+ v = exc->GS.freeVector.x;
+
+ if ( v != 0 )
+ {
+#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
+ if ( !SUBPIXEL_HINTING ||
+ ( !exc->ignore_x_mode ||
+ ( exc->sph_tweak_flags & SPH_TWEAK_ALLOW_X_DMOVE ) ) )
+#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
+ zone->cur[point].x += FT_MulDiv( distance, v, exc->F_dot_P );
+
+ zone->tags[point] |= FT_CURVE_TAG_TOUCH_X;
+ }
+
+ v = exc->GS.freeVector.y;
+
+ if ( v != 0 )
+ {
+ zone->cur[point].y += FT_MulDiv( distance, v, exc->F_dot_P );
+
+ zone->tags[point] |= FT_CURVE_TAG_TOUCH_Y;
+ }
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* <Function> */
+ /* Direct_Move_Orig */
+ /* */
+ /* <Description> */
+ /* Moves the *original* position of a point by a given distance along */
+ /* the freedom vector. Obviously, the point will not be `touched'. */
+ /* */
+ /* <Input> */
+ /* point :: The index of the point to move. */
+ /* */
+ /* distance :: The distance to apply. */
+ /* */
+ /* <InOut> */
+ /* zone :: The affected glyph zone. */
+ /* */
+ static void
+ Direct_Move_Orig( TT_ExecContext exc,
+ TT_GlyphZone zone,
+ FT_UShort point,
+ FT_F26Dot6 distance )
+ {
+ FT_F26Dot6 v;
+
+
+#ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING
+ FT_ASSERT( !exc->face->unpatented_hinting );
+#endif
+
+ v = exc->GS.freeVector.x;
+
+ if ( v != 0 )
+ zone->org[point].x += FT_MulDiv( distance, v, exc->F_dot_P );
+
+ v = exc->GS.freeVector.y;
+
+ if ( v != 0 )
+ zone->org[point].y += FT_MulDiv( distance, v, exc->F_dot_P );
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* Special versions of Direct_Move() */
+ /* */
+ /* The following versions are used whenever both vectors are both */
+ /* along one of the coordinate unit vectors, i.e. in 90% of the cases. */
+ /* */
+ /*************************************************************************/
+
+
+ static void
+ Direct_Move_X( TT_ExecContext exc,
+ TT_GlyphZone zone,
+ FT_UShort point,
+ FT_F26Dot6 distance )
+ {
+ FT_UNUSED( exc );
+
+#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
+ if ( !SUBPIXEL_HINTING ||
+ !exc->ignore_x_mode )
+#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
+ zone->cur[point].x += distance;
+
+ zone->tags[point] |= FT_CURVE_TAG_TOUCH_X;
+ }
+
+
+ static void
+ Direct_Move_Y( TT_ExecContext exc,
+ TT_GlyphZone zone,
+ FT_UShort point,
+ FT_F26Dot6 distance )
+ {
+ FT_UNUSED( exc );
+
+ zone->cur[point].y += distance;
+ zone->tags[point] |= FT_CURVE_TAG_TOUCH_Y;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* Special versions of Direct_Move_Orig() */
+ /* */
+ /* The following versions are used whenever both vectors are both */
+ /* along one of the coordinate unit vectors, i.e. in 90% of the cases. */
+ /* */
+ /*************************************************************************/
+
+
+ static void
+ Direct_Move_Orig_X( TT_ExecContext exc,
+ TT_GlyphZone zone,
+ FT_UShort point,
+ FT_F26Dot6 distance )
+ {
+ FT_UNUSED( exc );
+
+ zone->org[point].x += distance;
+ }
+
+
+ static void
+ Direct_Move_Orig_Y( TT_ExecContext exc,
+ TT_GlyphZone zone,
+ FT_UShort point,
+ FT_F26Dot6 distance )
+ {
+ FT_UNUSED( exc );
+
+ zone->org[point].y += distance;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* <Function> */
+ /* Round_None */
+ /* */
+ /* <Description> */
+ /* Does not round, but adds engine compensation. */
+ /* */
+ /* <Input> */
+ /* distance :: The distance (not) to round. */
+ /* */
+ /* compensation :: The engine compensation. */
+ /* */
+ /* <Return> */
+ /* The compensated distance. */
+ /* */
+ /* <Note> */
+ /* The TrueType specification says very few about the relationship */
+ /* between rounding and engine compensation. However, it seems from */
+ /* the description of super round that we should add the compensation */
+ /* before rounding. */
+ /* */
+ static FT_F26Dot6
+ Round_None( TT_ExecContext exc,
+ FT_F26Dot6 distance,
+ FT_F26Dot6 compensation )
+ {
+ FT_F26Dot6 val;
+
+ FT_UNUSED( exc );
+
+
+ if ( distance >= 0 )
+ {
+ val = distance + compensation;
+ if ( val < 0 )
+ val = 0;
+ }
+ else
+ {
+ val = distance - compensation;
+ if ( val > 0 )
+ val = 0;
+ }
+ return val;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* <Function> */
+ /* Round_To_Grid */
+ /* */
+ /* <Description> */
+ /* Rounds value to grid after adding engine compensation. */
+ /* */
+ /* <Input> */
+ /* distance :: The distance to round. */
+ /* */
+ /* compensation :: The engine compensation. */
+ /* */
+ /* <Return> */
+ /* Rounded distance. */
+ /* */
+ static FT_F26Dot6
+ Round_To_Grid( TT_ExecContext exc,
+ FT_F26Dot6 distance,
+ FT_F26Dot6 compensation )
+ {
+ FT_F26Dot6 val;
+
+ FT_UNUSED( exc );
+
+
+ if ( distance >= 0 )
+ {
+ val = FT_PIX_ROUND( distance + compensation );
+ if ( val < 0 )
+ val = 0;
+ }
+ else
+ {
+ val = -FT_PIX_ROUND( compensation - distance );
+ if ( val > 0 )
+ val = 0;
+ }
+
+ return val;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* <Function> */
+ /* Round_To_Half_Grid */
+ /* */
+ /* <Description> */
+ /* Rounds value to half grid after adding engine compensation. */
+ /* */
+ /* <Input> */
+ /* distance :: The distance to round. */
+ /* */
+ /* compensation :: The engine compensation. */
+ /* */
+ /* <Return> */
+ /* Rounded distance. */
+ /* */
+ static FT_F26Dot6
+ Round_To_Half_Grid( TT_ExecContext exc,
+ FT_F26Dot6 distance,
+ FT_F26Dot6 compensation )
+ {
+ FT_F26Dot6 val;
+
+ FT_UNUSED( exc );
+
+
+ if ( distance >= 0 )
+ {
+ val = FT_PIX_FLOOR( distance + compensation ) + 32;
+ if ( val < 0 )
+ val = 32;
+ }
+ else
+ {
+ val = -( FT_PIX_FLOOR( compensation - distance ) + 32 );
+ if ( val > 0 )
+ val = -32;
+ }
+
+ return val;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* <Function> */
+ /* Round_Down_To_Grid */
+ /* */
+ /* <Description> */
+ /* Rounds value down to grid after adding engine compensation. */
+ /* */
+ /* <Input> */
+ /* distance :: The distance to round. */
+ /* */
+ /* compensation :: The engine compensation. */
+ /* */
+ /* <Return> */
+ /* Rounded distance. */
+ /* */
+ static FT_F26Dot6
+ Round_Down_To_Grid( TT_ExecContext exc,
+ FT_F26Dot6 distance,
+ FT_F26Dot6 compensation )
+ {
+ FT_F26Dot6 val;
+
+ FT_UNUSED( exc );
+
+
+ if ( distance >= 0 )
+ {
+ val = FT_PIX_FLOOR( distance + compensation );
+ if ( val < 0 )
+ val = 0;
+ }
+ else
+ {
+ val = -FT_PIX_FLOOR( compensation - distance );
+ if ( val > 0 )
+ val = 0;
+ }
+
+ return val;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* <Function> */
+ /* Round_Up_To_Grid */
+ /* */
+ /* <Description> */
+ /* Rounds value up to grid after adding engine compensation. */
+ /* */
+ /* <Input> */
+ /* distance :: The distance to round. */
+ /* */
+ /* compensation :: The engine compensation. */
+ /* */
+ /* <Return> */
+ /* Rounded distance. */
+ /* */
+ static FT_F26Dot6
+ Round_Up_To_Grid( TT_ExecContext exc,
+ FT_F26Dot6 distance,
+ FT_F26Dot6 compensation )
+ {
+ FT_F26Dot6 val;
+
+ FT_UNUSED( exc );
+
+
+ if ( distance >= 0 )
+ {
+ val = FT_PIX_CEIL( distance + compensation );
+ if ( val < 0 )
+ val = 0;
+ }
+ else
+ {
+ val = -FT_PIX_CEIL( compensation - distance );
+ if ( val > 0 )
+ val = 0;
+ }
+
+ return val;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* <Function> */
+ /* Round_To_Double_Grid */
+ /* */
+ /* <Description> */
+ /* Rounds value to double grid after adding engine compensation. */
+ /* */
+ /* <Input> */
+ /* distance :: The distance to round. */
+ /* */
+ /* compensation :: The engine compensation. */
+ /* */
+ /* <Return> */
+ /* Rounded distance. */
+ /* */
+ static FT_F26Dot6
+ Round_To_Double_Grid( TT_ExecContext exc,
+ FT_F26Dot6 distance,
+ FT_F26Dot6 compensation )
+ {
+ FT_F26Dot6 val;
+
+ FT_UNUSED( exc );
+
+
+ if ( distance >= 0 )
+ {
+ val = FT_PAD_ROUND( distance + compensation, 32 );
+ if ( val < 0 )
+ val = 0;
+ }
+ else
+ {
+ val = -FT_PAD_ROUND( compensation - distance, 32 );
+ if ( val > 0 )
+ val = 0;
+ }
+
+ return val;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* <Function> */
+ /* Round_Super */
+ /* */
+ /* <Description> */
+ /* Super-rounds value to grid after adding engine compensation. */
+ /* */
+ /* <Input> */
+ /* distance :: The distance to round. */
+ /* */
+ /* compensation :: The engine compensation. */
+ /* */
+ /* <Return> */
+ /* Rounded distance. */
+ /* */
+ /* <Note> */
+ /* The TrueType specification says very few about the relationship */
+ /* between rounding and engine compensation. However, it seems from */
+ /* the description of super round that we should add the compensation */
+ /* before rounding. */
+ /* */
+ static FT_F26Dot6
+ Round_Super( TT_ExecContext exc,
+ FT_F26Dot6 distance,
+ FT_F26Dot6 compensation )
+ {
+ FT_F26Dot6 val;
+
+
+ if ( distance >= 0 )
+ {
+ val = ( distance - exc->phase + exc->threshold + compensation ) &
+ -exc->period;
+ val += exc->phase;
+ if ( val < 0 )
+ val = exc->phase;
+ }
+ else
+ {
+ val = -( ( exc->threshold - exc->phase - distance + compensation ) &
+ -exc->period );
+ val -= exc->phase;
+ if ( val > 0 )
+ val = -exc->phase;
+ }
+
+ return val;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* <Function> */
+ /* Round_Super_45 */
+ /* */
+ /* <Description> */
+ /* Super-rounds value to grid after adding engine compensation. */
+ /* */
+ /* <Input> */
+ /* distance :: The distance to round. */
+ /* */
+ /* compensation :: The engine compensation. */
+ /* */
+ /* <Return> */
+ /* Rounded distance. */
+ /* */
+ /* <Note> */
+ /* There is a separate function for Round_Super_45() as we may need */
+ /* greater precision. */
+ /* */
+ static FT_F26Dot6
+ Round_Super_45( TT_ExecContext exc,
+ FT_F26Dot6 distance,
+ FT_F26Dot6 compensation )
+ {
+ FT_F26Dot6 val;
+
+
+ if ( distance >= 0 )
+ {
+ val = ( ( distance - exc->phase + exc->threshold + compensation ) /
+ exc->period ) * exc->period;
+ val += exc->phase;
+ if ( val < 0 )
+ val = exc->phase;
+ }
+ else
+ {
+ val = -( ( ( exc->threshold - exc->phase - distance + compensation ) /
+ exc->period ) * exc->period );
+ val -= exc->phase;
+ if ( val > 0 )
+ val = -exc->phase;
+ }
+
+ return val;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* <Function> */
+ /* Compute_Round */
+ /* */
+ /* <Description> */
+ /* Sets the rounding mode. */
+ /* */
+ /* <Input> */
+ /* round_mode :: The rounding mode to be used. */
+ /* */
+ static void
+ Compute_Round( TT_ExecContext exc,
+ FT_Byte round_mode )
+ {
+ switch ( round_mode )
+ {
+ case TT_Round_Off:
+ exc->func_round = (TT_Round_Func)Round_None;
+ break;
+
+ case TT_Round_To_Grid:
+ exc->func_round = (TT_Round_Func)Round_To_Grid;
+ break;
+
+ case TT_Round_Up_To_Grid:
+ exc->func_round = (TT_Round_Func)Round_Up_To_Grid;
+ break;
+
+ case TT_Round_Down_To_Grid:
+ exc->func_round = (TT_Round_Func)Round_Down_To_Grid;
+ break;
+
+ case TT_Round_To_Half_Grid:
+ exc->func_round = (TT_Round_Func)Round_To_Half_Grid;
+ break;
+
+ case TT_Round_To_Double_Grid:
+ exc->func_round = (TT_Round_Func)Round_To_Double_Grid;
+ break;
+
+ case TT_Round_Super:
+ exc->func_round = (TT_Round_Func)Round_Super;
+ break;
+
+ case TT_Round_Super_45:
+ exc->func_round = (TT_Round_Func)Round_Super_45;
+ break;
+ }
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* <Function> */
+ /* SetSuperRound */
+ /* */
+ /* <Description> */
+ /* Sets Super Round parameters. */
+ /* */
+ /* <Input> */
+ /* GridPeriod :: The grid period. */
+ /* */
+ /* selector :: The SROUND opcode. */
+ /* */
+ static void
+ SetSuperRound( TT_ExecContext exc,
+ FT_F2Dot14 GridPeriod,
+ FT_Long selector )
+ {
+ switch ( (FT_Int)( selector & 0xC0 ) )
+ {
+ case 0:
+ exc->period = GridPeriod / 2;
+ break;
+
+ case 0x40:
+ exc->period = GridPeriod;
+ break;
+
+ case 0x80:
+ exc->period = GridPeriod * 2;
+ break;
+
+ /* This opcode is reserved, but... */
+ case 0xC0:
+ exc->period = GridPeriod;
+ break;
+ }
+
+ switch ( (FT_Int)( selector & 0x30 ) )
+ {
+ case 0:
+ exc->phase = 0;
+ break;
+
+ case 0x10:
+ exc->phase = exc->period / 4;
+ break;
+
+ case 0x20:
+ exc->phase = exc->period / 2;
+ break;
+
+ case 0x30:
+ exc->phase = exc->period * 3 / 4;
+ break;
+ }
+
+ if ( ( selector & 0x0F ) == 0 )
+ exc->threshold = exc->period - 1;
+ else
+ exc->threshold = ( (FT_Int)( selector & 0x0F ) - 4 ) * exc->period / 8;
+
+ /* convert to F26Dot6 format */
+ exc->period >>= 8;
+ exc->phase >>= 8;
+ exc->threshold >>= 8;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* <Function> */
+ /* Project */
+ /* */
+ /* <Description> */
+ /* Computes the projection of vector given by (v2-v1) along the */
+ /* current projection vector. */
+ /* */
+ /* <Input> */
+ /* v1 :: First input vector. */
+ /* v2 :: Second input vector. */
+ /* */
+ /* <Return> */
+ /* The distance in F26dot6 format. */
+ /* */
+ static FT_F26Dot6
+ Project( TT_ExecContext exc,
+ FT_Pos dx,
+ FT_Pos dy )
+ {
+#ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING
+ FT_ASSERT( !exc->face->unpatented_hinting );
+#endif
+
+ return TT_DotFix14( dx, dy,
+ exc->GS.projVector.x,
+ exc->GS.projVector.y );
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* <Function> */
+ /* Dual_Project */
+ /* */
+ /* <Description> */
+ /* Computes the projection of the vector given by (v2-v1) along the */
+ /* current dual vector. */
+ /* */
+ /* <Input> */
+ /* v1 :: First input vector. */
+ /* v2 :: Second input vector. */
+ /* */
+ /* <Return> */
+ /* The distance in F26dot6 format. */
+ /* */
+ static FT_F26Dot6
+ Dual_Project( TT_ExecContext exc,
+ FT_Pos dx,
+ FT_Pos dy )
+ {
+ return TT_DotFix14( dx, dy,
+ exc->GS.dualVector.x,
+ exc->GS.dualVector.y );
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* <Function> */
+ /* Project_x */
+ /* */
+ /* <Description> */
+ /* Computes the projection of the vector given by (v2-v1) along the */
+ /* horizontal axis. */
+ /* */
+ /* <Input> */
+ /* v1 :: First input vector. */
+ /* v2 :: Second input vector. */
+ /* */
+ /* <Return> */
+ /* The distance in F26dot6 format. */
+ /* */
+ static FT_F26Dot6
+ Project_x( TT_ExecContext exc,
+ FT_Pos dx,
+ FT_Pos dy )
+ {
+ FT_UNUSED( exc );
+ FT_UNUSED( dy );
+
+ return dx;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* <Function> */
+ /* Project_y */
+ /* */
+ /* <Description> */
+ /* Computes the projection of the vector given by (v2-v1) along the */
+ /* vertical axis. */
+ /* */
+ /* <Input> */
+ /* v1 :: First input vector. */
+ /* v2 :: Second input vector. */
+ /* */
+ /* <Return> */
+ /* The distance in F26dot6 format. */
+ /* */
+ static FT_F26Dot6
+ Project_y( TT_ExecContext exc,
+ FT_Pos dx,
+ FT_Pos dy )
+ {
+ FT_UNUSED( exc );
+ FT_UNUSED( dx );
+
+ return dy;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* <Function> */
+ /* Compute_Funcs */
+ /* */
+ /* <Description> */
+ /* Computes the projection and movement function pointers according */
+ /* to the current graphics state. */
+ /* */
+ static void
+ Compute_Funcs( TT_ExecContext exc )
+ {
+#ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING
+ if ( exc->face->unpatented_hinting )
+ {
+ /* If both vectors point rightwards along the x axis, set */
+ /* `both-x-axis' true, otherwise set it false. The x values only */
+ /* need be tested because the vector has been normalised to a unit */
+ /* vector of length 0x4000 = unity. */
+ exc->GS.both_x_axis = (FT_Bool)( exc->GS.projVector.x == 0x4000 &&
+ exc->GS.freeVector.x == 0x4000 );
+
+ /* Throw away projection and freedom vector information */
+ /* because the patents don't allow them to be stored. */
+ /* The relevant US Patents are 5155805 and 5325479. */
+ exc->GS.projVector.x = 0;
+ exc->GS.projVector.y = 0;
+ exc->GS.freeVector.x = 0;
+ exc->GS.freeVector.y = 0;
+
+ if ( exc->GS.both_x_axis )
+ {
+ exc->func_project = Project_x;
+ exc->func_move = Direct_Move_X;
+ exc->func_move_orig = Direct_Move_Orig_X;
+ }
+ else
+ {
+ exc->func_project = Project_y;
+ exc->func_move = Direct_Move_Y;
+ exc->func_move_orig = Direct_Move_Orig_Y;
+ }
+
+ if ( exc->GS.dualVector.x == 0x4000 )
+ exc->func_dualproj = Project_x;
+ else if ( exc->GS.dualVector.y == 0x4000 )
+ exc->func_dualproj = Project_y;
+ else
+ exc->func_dualproj = Dual_Project;
+
+ /* Force recalculation of cached aspect ratio */
+ exc->tt_metrics.ratio = 0;
+
+ return;
+ }
+#endif /* TT_CONFIG_OPTION_UNPATENTED_HINTING */
+
+ if ( exc->GS.freeVector.x == 0x4000 )
+ exc->F_dot_P = exc->GS.projVector.x;
+ else if ( exc->GS.freeVector.y == 0x4000 )
+ exc->F_dot_P = exc->GS.projVector.y;
+ else
+ exc->F_dot_P =
+ ( (FT_Long)exc->GS.projVector.x * exc->GS.freeVector.x +
+ (FT_Long)exc->GS.projVector.y * exc->GS.freeVector.y ) >> 14;
+
+ if ( exc->GS.projVector.x == 0x4000 )
+ exc->func_project = (TT_Project_Func)Project_x;
+ else if ( exc->GS.projVector.y == 0x4000 )
+ exc->func_project = (TT_Project_Func)Project_y;
+ else
+ exc->func_project = (TT_Project_Func)Project;
+
+ if ( exc->GS.dualVector.x == 0x4000 )
+ exc->func_dualproj = (TT_Project_Func)Project_x;
+ else if ( exc->GS.dualVector.y == 0x4000 )
+ exc->func_dualproj = (TT_Project_Func)Project_y;
+ else
+ exc->func_dualproj = (TT_Project_Func)Dual_Project;
+
+ exc->func_move = (TT_Move_Func)Direct_Move;
+ exc->func_move_orig = (TT_Move_Func)Direct_Move_Orig;
+
+ if ( exc->F_dot_P == 0x4000L )
+ {
+ if ( exc->GS.freeVector.x == 0x4000 )
+ {
+ exc->func_move = (TT_Move_Func)Direct_Move_X;
+ exc->func_move_orig = (TT_Move_Func)Direct_Move_Orig_X;
+ }
+ else if ( exc->GS.freeVector.y == 0x4000 )
+ {
+ exc->func_move = (TT_Move_Func)Direct_Move_Y;
+ exc->func_move_orig = (TT_Move_Func)Direct_Move_Orig_Y;
+ }
+ }
+
+ /* at small sizes, F_dot_P can become too small, resulting */
+ /* in overflows and `spikes' in a number of glyphs like `w'. */
+
+ if ( FT_ABS( exc->F_dot_P ) < 0x400L )
+ exc->F_dot_P = 0x4000L;
+
+ /* Disable cached aspect ratio */
+ exc->tt_metrics.ratio = 0;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* <Function> */
+ /* Normalize */
+ /* */
+ /* <Description> */
+ /* Norms a vector. */
+ /* */
+ /* <Input> */
+ /* Vx :: The horizontal input vector coordinate. */
+ /* Vy :: The vertical input vector coordinate. */
+ /* */
+ /* <Output> */
+ /* R :: The normed unit vector. */
+ /* */
+ /* <Return> */
+ /* Returns FAILURE if a vector parameter is zero. */
+ /* */
+ /* <Note> */
+ /* In case Vx and Vy are both zero, `Normalize' returns SUCCESS, and */
+ /* R is undefined. */
+ /* */
+ static FT_Bool
+ Normalize( FT_F26Dot6 Vx,
+ FT_F26Dot6 Vy,
+ FT_UnitVector* R )
+ {
+ FT_F26Dot6 W;
+
+
+ if ( FT_ABS( Vx ) < 0x4000L && FT_ABS( Vy ) < 0x4000L )
+ {
+ if ( Vx == 0 && Vy == 0 )
+ {
+ /* XXX: UNDOCUMENTED! It seems that it is possible to try */
+ /* to normalize the vector (0,0). Return immediately. */
+ return SUCCESS;
+ }
+
+ Vx *= 0x4000;
+ Vy *= 0x4000;
+ }
+
+ W = FT_Hypot( Vx, Vy );
+
+ R->x = (FT_F2Dot14)TT_DivFix14( Vx, W );
+ R->y = (FT_F2Dot14)TT_DivFix14( Vy, W );
+
+ return SUCCESS;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* Here we start with the implementation of the various opcodes. */
+ /* */
+ /*************************************************************************/
+
+
+#define ARRAY_BOUND_ERROR \
+ do \
+ { \
+ exc->error = FT_THROW( Invalid_Reference ); \
+ return; \
+ } while (0)
+
+
+ /*************************************************************************/
+ /* */
+ /* MPPEM[]: Measure Pixel Per EM */
+ /* Opcode range: 0x4B */
+ /* Stack: --> Euint16 */
+ /* */
+ static void
+ Ins_MPPEM( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ args[0] = exc->func_cur_ppem( exc );
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* MPS[]: Measure Point Size */
+ /* Opcode range: 0x4C */
+ /* Stack: --> Euint16 */
+ /* */
+ static void
+ Ins_MPS( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ /* Note: The point size should be irrelevant in a given font program; */
+ /* we thus decide to return only the PPEM value. */
+#if 0
+ args[0] = exc->metrics.pointSize;
+#else
+ args[0] = exc->func_cur_ppem( exc );
+#endif
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* DUP[]: DUPlicate the stack's top element */
+ /* Opcode range: 0x20 */
+ /* Stack: StkElt --> StkElt StkElt */
+ /* */
+ static void
+ Ins_DUP( FT_Long* args )
+ {
+ args[1] = args[0];
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* POP[]: POP the stack's top element */
+ /* Opcode range: 0x21 */
+ /* Stack: StkElt --> */
+ /* */
+ static void
+ Ins_POP( void )
+ {
+ /* nothing to do */
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* CLEAR[]: CLEAR the entire stack */
+ /* Opcode range: 0x22 */
+ /* Stack: StkElt... --> */
+ /* */
+ static void
+ Ins_CLEAR( TT_ExecContext exc )
+ {
+ exc->new_top = 0;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* SWAP[]: SWAP the stack's top two elements */
+ /* Opcode range: 0x23 */
+ /* Stack: 2 * StkElt --> 2 * StkElt */
+ /* */
+ static void
+ Ins_SWAP( FT_Long* args )
+ {
+ FT_Long L;
+
+
+ L = args[0];
+ args[0] = args[1];
+ args[1] = L;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* DEPTH[]: return the stack DEPTH */
+ /* Opcode range: 0x24 */
+ /* Stack: --> uint32 */
+ /* */
+ static void
+ Ins_DEPTH( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ args[0] = exc->top;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* LT[]: Less Than */
+ /* Opcode range: 0x50 */
+ /* Stack: int32? int32? --> bool */
+ /* */
+ static void
+ Ins_LT( FT_Long* args )
+ {
+ args[0] = ( args[0] < args[1] );
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* LTEQ[]: Less Than or EQual */
+ /* Opcode range: 0x51 */
+ /* Stack: int32? int32? --> bool */
+ /* */
+ static void
+ Ins_LTEQ( FT_Long* args )
+ {
+ args[0] = ( args[0] <= args[1] );
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* GT[]: Greater Than */
+ /* Opcode range: 0x52 */
+ /* Stack: int32? int32? --> bool */
+ /* */
+ static void
+ Ins_GT( FT_Long* args )
+ {
+ args[0] = ( args[0] > args[1] );
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* GTEQ[]: Greater Than or EQual */
+ /* Opcode range: 0x53 */
+ /* Stack: int32? int32? --> bool */
+ /* */
+ static void
+ Ins_GTEQ( FT_Long* args )
+ {
+ args[0] = ( args[0] >= args[1] );
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* EQ[]: EQual */
+ /* Opcode range: 0x54 */
+ /* Stack: StkElt StkElt --> bool */
+ /* */
+ static void
+ Ins_EQ( FT_Long* args )
+ {
+ args[0] = ( args[0] == args[1] );
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* NEQ[]: Not EQual */
+ /* Opcode range: 0x55 */
+ /* Stack: StkElt StkElt --> bool */
+ /* */
+ static void
+ Ins_NEQ( FT_Long* args )
+ {
+ args[0] = ( args[0] != args[1] );
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* ODD[]: Is ODD */
+ /* Opcode range: 0x56 */
+ /* Stack: f26.6 --> bool */
+ /* */
+ static void
+ Ins_ODD( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ args[0] = ( ( exc->func_round( exc, args[0], 0 ) & 127 ) == 64 );
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* EVEN[]: Is EVEN */
+ /* Opcode range: 0x57 */
+ /* Stack: f26.6 --> bool */
+ /* */
+ static void
+ Ins_EVEN( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ args[0] = ( ( exc->func_round( exc, args[0], 0 ) & 127 ) == 0 );
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* AND[]: logical AND */
+ /* Opcode range: 0x5A */
+ /* Stack: uint32 uint32 --> uint32 */
+ /* */
+ static void
+ Ins_AND( FT_Long* args )
+ {
+ args[0] = ( args[0] && args[1] );
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* OR[]: logical OR */
+ /* Opcode range: 0x5B */
+ /* Stack: uint32 uint32 --> uint32 */
+ /* */
+ static void
+ Ins_OR( FT_Long* args )
+ {
+ args[0] = ( args[0] || args[1] );
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* NOT[]: logical NOT */
+ /* Opcode range: 0x5C */
+ /* Stack: StkElt --> uint32 */
+ /* */
+ static void
+ Ins_NOT( FT_Long* args )
+ {
+ args[0] = !args[0];
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* ADD[]: ADD */
+ /* Opcode range: 0x60 */
+ /* Stack: f26.6 f26.6 --> f26.6 */
+ /* */
+ static void
+ Ins_ADD( FT_Long* args )
+ {
+ args[0] += args[1];
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* SUB[]: SUBtract */
+ /* Opcode range: 0x61 */
+ /* Stack: f26.6 f26.6 --> f26.6 */
+ /* */
+ static void
+ Ins_SUB( FT_Long* args )
+ {
+ args[0] -= args[1];
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* DIV[]: DIVide */
+ /* Opcode range: 0x62 */
+ /* Stack: f26.6 f26.6 --> f26.6 */
+ /* */
+ static void
+ Ins_DIV( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ if ( args[1] == 0 )
+ exc->error = FT_THROW( Divide_By_Zero );
+ else
+ args[0] = FT_MulDiv_No_Round( args[0], 64L, args[1] );
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* MUL[]: MULtiply */
+ /* Opcode range: 0x63 */
+ /* Stack: f26.6 f26.6 --> f26.6 */
+ /* */
+ static void
+ Ins_MUL( FT_Long* args )
+ {
+ args[0] = FT_MulDiv( args[0], args[1], 64L );
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* ABS[]: ABSolute value */
+ /* Opcode range: 0x64 */
+ /* Stack: f26.6 --> f26.6 */
+ /* */
+ static void
+ Ins_ABS( FT_Long* args )
+ {
+ args[0] = FT_ABS( args[0] );
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* NEG[]: NEGate */
+ /* Opcode range: 0x65 */
+ /* Stack: f26.6 --> f26.6 */
+ /* */
+ static void
+ Ins_NEG( FT_Long* args )
+ {
+ args[0] = -args[0];
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* FLOOR[]: FLOOR */
+ /* Opcode range: 0x66 */
+ /* Stack: f26.6 --> f26.6 */
+ /* */
+ static void
+ Ins_FLOOR( FT_Long* args )
+ {
+ args[0] = FT_PIX_FLOOR( args[0] );
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* CEILING[]: CEILING */
+ /* Opcode range: 0x67 */
+ /* Stack: f26.6 --> f26.6 */
+ /* */
+ static void
+ Ins_CEILING( FT_Long* args )
+ {
+ args[0] = FT_PIX_CEIL( args[0] );
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* RS[]: Read Store */
+ /* Opcode range: 0x43 */
+ /* Stack: uint32 --> uint32 */
+ /* */
+ static void
+ Ins_RS( TT_ExecContext exc,
+ FT_Long* args )
+ {
+#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
+
+ FT_ULong I = (FT_ULong)args[0];
+
+
+ if ( BOUNDSL( I, exc->storeSize ) )
+ {
+ if ( exc->pedantic_hinting )
+ ARRAY_BOUND_ERROR;
+ else
+ args[0] = 0;
+ }
+ else
+ {
+ /* subpixel hinting - avoid Typeman Dstroke and */
+ /* IStroke and Vacuform rounds */
+ if ( SUBPIXEL_HINTING &&
+ exc->ignore_x_mode &&
+ ( ( I == 24 &&
+ ( exc->face->sph_found_func_flags &
+ ( SPH_FDEF_SPACING_1 |
+ SPH_FDEF_SPACING_2 ) ) ) ||
+ ( I == 22 &&
+ ( exc->sph_in_func_flags &
+ SPH_FDEF_TYPEMAN_STROKES ) ) ||
+ ( I == 8 &&
+ ( exc->face->sph_found_func_flags &
+ SPH_FDEF_VACUFORM_ROUND_1 ) &&
+ exc->iup_called ) ) )
+ args[0] = 0;
+ else
+ args[0] = exc->storage[I];
+ }
+
+#else /* !TT_CONFIG_OPTION_SUBPIXEL_HINTING */
+
+ FT_ULong I = (FT_ULong)args[0];
+
+
+ if ( BOUNDSL( I, exc->storeSize ) )
+ {
+ if ( exc->pedantic_hinting )
+ ARRAY_BOUND_ERROR;
+ else
+ args[0] = 0;
+ }
+ else
+ args[0] = exc->storage[I];
+
+#endif /* !TT_CONFIG_OPTION_SUBPIXEL_HINTING */
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* WS[]: Write Store */
+ /* Opcode range: 0x42 */
+ /* Stack: uint32 uint32 --> */
+ /* */
+ static void
+ Ins_WS( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ FT_ULong I = (FT_ULong)args[0];
+
+
+ if ( BOUNDSL( I, exc->storeSize ) )
+ {
+ if ( exc->pedantic_hinting )
+ ARRAY_BOUND_ERROR;
+ }
+ else
+ exc->storage[I] = args[1];
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* WCVTP[]: Write CVT in Pixel units */
+ /* Opcode range: 0x44 */
+ /* Stack: f26.6 uint32 --> */
+ /* */
+ static void
+ Ins_WCVTP( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ FT_ULong I = (FT_ULong)args[0];
+
+
+ if ( BOUNDSL( I, exc->cvtSize ) )
+ {
+ if ( exc->pedantic_hinting )
+ ARRAY_BOUND_ERROR;
+ }
+ else
+ exc->func_write_cvt( exc, I, args[1] );
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* WCVTF[]: Write CVT in Funits */
+ /* Opcode range: 0x70 */
+ /* Stack: uint32 uint32 --> */
+ /* */
+ static void
+ Ins_WCVTF( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ FT_ULong I = (FT_ULong)args[0];
+
+
+ if ( BOUNDSL( I, exc->cvtSize ) )
+ {
+ if ( exc->pedantic_hinting )
+ ARRAY_BOUND_ERROR;
+ }
+ else
+ exc->cvt[I] = FT_MulFix( args[1], exc->tt_metrics.scale );
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* RCVT[]: Read CVT */
+ /* Opcode range: 0x45 */
+ /* Stack: uint32 --> f26.6 */
+ /* */
+ static void
+ Ins_RCVT( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ FT_ULong I = (FT_ULong)args[0];
+
+
+ if ( BOUNDSL( I, exc->cvtSize ) )
+ {
+ if ( exc->pedantic_hinting )
+ ARRAY_BOUND_ERROR;
+ else
+ args[0] = 0;
+ }
+ else
+ args[0] = exc->func_read_cvt( exc, I );
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* AA[]: Adjust Angle */
+ /* Opcode range: 0x7F */
+ /* Stack: uint32 --> */
+ /* */
+ static void
+ Ins_AA( void )
+ {
+ /* intentionally no longer supported */
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* DEBUG[]: DEBUG. Unsupported. */
+ /* Opcode range: 0x4F */
+ /* Stack: uint32 --> */
+ /* */
+ /* Note: The original instruction pops a value from the stack. */
+ /* */
+ static void
+ Ins_DEBUG( TT_ExecContext exc )
+ {
+ exc->error = FT_THROW( Debug_OpCode );
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* ROUND[ab]: ROUND value */
+ /* Opcode range: 0x68-0x6B */
+ /* Stack: f26.6 --> f26.6 */
+ /* */
+ static void
+ Ins_ROUND( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ args[0] = exc->func_round(
+ exc,
+ args[0],
+ exc->tt_metrics.compensations[exc->opcode - 0x68] );
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* NROUND[ab]: No ROUNDing of value */
+ /* Opcode range: 0x6C-0x6F */
+ /* Stack: f26.6 --> f26.6 */
+ /* */
+ static void
+ Ins_NROUND( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ args[0] = Round_None(
+ exc,
+ args[0],
+ exc->tt_metrics.compensations[exc->opcode - 0x6C] );
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* MAX[]: MAXimum */
+ /* Opcode range: 0x68 */
+ /* Stack: int32? int32? --> int32 */
+ /* */
+ static void
+ Ins_MAX( FT_Long* args )
+ {
+ if ( args[1] > args[0] )
+ args[0] = args[1];
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* MIN[]: MINimum */
+ /* Opcode range: 0x69 */
+ /* Stack: int32? int32? --> int32 */
+ /* */
+ static void
+ Ins_MIN( FT_Long* args )
+ {
+ if ( args[1] < args[0] )
+ args[0] = args[1];
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* MINDEX[]: Move INDEXed element */
+ /* Opcode range: 0x26 */
+ /* Stack: int32? --> StkElt */
+ /* */
+ static void
+ Ins_MINDEX( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ FT_Long L, K;
+
+
+ L = args[0];
+
+ if ( L <= 0 || L > exc->args )
+ {
+ if ( exc->pedantic_hinting )
+ exc->error = FT_THROW( Invalid_Reference );
+ }
+ else
+ {
+ K = exc->stack[exc->args - L];
+
+ FT_ARRAY_MOVE( &exc->stack[exc->args - L ],
+ &exc->stack[exc->args - L + 1],
+ ( L - 1 ) );
+
+ exc->stack[exc->args - 1] = K;
+ }
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* CINDEX[]: Copy INDEXed element */
+ /* Opcode range: 0x25 */
+ /* Stack: int32 --> StkElt */
+ /* */
+ static void
+ Ins_CINDEX( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ FT_Long L;
+
+
+ L = args[0];
+
+ if ( L <= 0 || L > exc->args )
+ {
+ if ( exc->pedantic_hinting )
+ exc->error = FT_THROW( Invalid_Reference );
+ args[0] = 0;
+ }
+ else
+ args[0] = exc->stack[exc->args - L];
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* ROLL[]: ROLL top three elements */
+ /* Opcode range: 0x8A */
+ /* Stack: 3 * StkElt --> 3 * StkElt */
+ /* */
+ static void
+ Ins_ROLL( FT_Long* args )
+ {
+ FT_Long A, B, C;
+
+
+ A = args[2];
+ B = args[1];
+ C = args[0];
+
+ args[2] = C;
+ args[1] = A;
+ args[0] = B;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* MANAGING THE FLOW OF CONTROL */
+ /* */
+ /*************************************************************************/
+
+
+ /*************************************************************************/
+ /* */
+ /* SLOOP[]: Set LOOP variable */
+ /* Opcode range: 0x17 */
+ /* Stack: int32? --> */
+ /* */
+ static void
+ Ins_SLOOP( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ if ( args[0] < 0 )
+ exc->error = FT_THROW( Bad_Argument );
+ else
+ exc->GS.loop = args[0];
+ }
+
+
+ static FT_Bool
+ SkipCode( TT_ExecContext exc )
+ {
+ exc->IP += exc->length;
+
+ if ( exc->IP < exc->codeSize )
+ {
+ exc->opcode = exc->code[exc->IP];
+
+ exc->length = opcode_length[exc->opcode];
+ if ( exc->length < 0 )
+ {
+ if ( exc->IP + 1 >= exc->codeSize )
+ goto Fail_Overflow;
+ exc->length = 2 - exc->length * exc->code[exc->IP + 1];
+ }
+
+ if ( exc->IP + exc->length <= exc->codeSize )
+ return SUCCESS;
+ }
+
+ Fail_Overflow:
+ exc->error = FT_THROW( Code_Overflow );
+ return FAILURE;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* IF[]: IF test */
+ /* Opcode range: 0x58 */
+ /* Stack: StkElt --> */
+ /* */
+ static void
+ Ins_IF( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ FT_Int nIfs;
+ FT_Bool Out;
+
+
+ if ( args[0] != 0 )
+ return;
+
+ nIfs = 1;
+ Out = 0;
+
+ do
+ {
+ if ( SkipCode( exc ) == FAILURE )
+ return;
+
+ switch ( exc->opcode )
+ {
+ case 0x58: /* IF */
+ nIfs++;
+ break;
+
+ case 0x1B: /* ELSE */
+ Out = FT_BOOL( nIfs == 1 );
+ break;
+
+ case 0x59: /* EIF */
+ nIfs--;
+ Out = FT_BOOL( nIfs == 0 );
+ break;
+ }
+ } while ( Out == 0 );
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* ELSE[]: ELSE */
+ /* Opcode range: 0x1B */
+ /* Stack: --> */
+ /* */
+ static void
+ Ins_ELSE( TT_ExecContext exc )
+ {
+ FT_Int nIfs;
+
+
+ nIfs = 1;
+
+ do
+ {
+ if ( SkipCode( exc ) == FAILURE )
+ return;
+
+ switch ( exc->opcode )
+ {
+ case 0x58: /* IF */
+ nIfs++;
+ break;
+
+ case 0x59: /* EIF */
+ nIfs--;
+ break;
+ }
+ } while ( nIfs != 0 );
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* EIF[]: End IF */
+ /* Opcode range: 0x59 */
+ /* Stack: --> */
+ /* */
+ static void
+ Ins_EIF( void )
+ {
+ /* nothing to do */
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* JMPR[]: JuMP Relative */
+ /* Opcode range: 0x1C */
+ /* Stack: int32 --> */
+ /* */
+ static void
+ Ins_JMPR( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ if ( args[0] == 0 && exc->args == 0 )
+ exc->error = FT_THROW( Bad_Argument );
+ exc->IP += args[0];
+ if ( exc->IP < 0 ||
+ ( exc->callTop > 0 &&
+ exc->IP > exc->callStack[exc->callTop - 1].Def->end ) )
+ exc->error = FT_THROW( Bad_Argument );
+ exc->step_ins = FALSE;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* JROT[]: Jump Relative On True */
+ /* Opcode range: 0x78 */
+ /* Stack: StkElt int32 --> */
+ /* */
+ static void
+ Ins_JROT( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ if ( args[1] != 0 )
+ Ins_JMPR( exc, args );
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* JROF[]: Jump Relative On False */
+ /* Opcode range: 0x79 */
+ /* Stack: StkElt int32 --> */
+ /* */
+ static void
+ Ins_JROF( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ if ( args[1] == 0 )
+ Ins_JMPR( exc, args );
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* DEFINING AND USING FUNCTIONS AND INSTRUCTIONS */
+ /* */
+ /*************************************************************************/
+
+
+ /*************************************************************************/
+ /* */
+ /* FDEF[]: Function DEFinition */
+ /* Opcode range: 0x2C */
+ /* Stack: uint32 --> */
+ /* */
+ static void
+ Ins_FDEF( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ FT_ULong n;
+ TT_DefRecord* rec;
+ TT_DefRecord* limit;
+
+#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
+ /* arguments to opcodes are skipped by `SKIP_Code' */
+ FT_Byte opcode_pattern[9][12] = {
+ /* #0 inline delta function 1 */
+ {
+ 0x4B, /* PPEM */
+ 0x53, /* GTEQ */
+ 0x23, /* SWAP */
+ 0x4B, /* PPEM */
+ 0x51, /* LTEQ */
+ 0x5A, /* AND */
+ 0x58, /* IF */
+ 0x38, /* SHPIX */
+ 0x1B, /* ELSE */
+ 0x21, /* POP */
+ 0x21, /* POP */
+ 0x59 /* EIF */
+ },
+ /* #1 inline delta function 2 */
+ {
+ 0x4B, /* PPEM */
+ 0x54, /* EQ */
+ 0x58, /* IF */
+ 0x38, /* SHPIX */
+ 0x1B, /* ELSE */
+ 0x21, /* POP */
+ 0x21, /* POP */
+ 0x59 /* EIF */
+ },
+ /* #2 diagonal stroke function */
+ {
+ 0x20, /* DUP */
+ 0x20, /* DUP */
+ 0xB0, /* PUSHB_1 */
+ /* 1 */
+ 0x60, /* ADD */
+ 0x46, /* GC_cur */
+ 0xB0, /* PUSHB_1 */
+ /* 64 */
+ 0x23, /* SWAP */
+ 0x42 /* WS */
+ },
+ /* #3 VacuFormRound function */
+ {
+ 0x45, /* RCVT */
+ 0x23, /* SWAP */
+ 0x46, /* GC_cur */
+ 0x60, /* ADD */
+ 0x20, /* DUP */
+ 0xB0 /* PUSHB_1 */
+ /* 38 */
+ },
+ /* #4 TTFautohint bytecode (old) */
+ {
+ 0x20, /* DUP */
+ 0x64, /* ABS */
+ 0xB0, /* PUSHB_1 */
+ /* 32 */
+ 0x60, /* ADD */
+ 0x66, /* FLOOR */
+ 0x23, /* SWAP */
+ 0xB0 /* PUSHB_1 */
+ },
+ /* #5 spacing function 1 */
+ {
+ 0x01, /* SVTCA_x */
+ 0xB0, /* PUSHB_1 */
+ /* 24 */
+ 0x43, /* RS */
+ 0x58 /* IF */
+ },
+ /* #6 spacing function 2 */
+ {
+ 0x01, /* SVTCA_x */
+ 0x18, /* RTG */
+ 0xB0, /* PUSHB_1 */
+ /* 24 */
+ 0x43, /* RS */
+ 0x58 /* IF */
+ },
+ /* #7 TypeMan Talk DiagEndCtrl function */
+ {
+ 0x01, /* SVTCA_x */
+ 0x20, /* DUP */
+ 0xB0, /* PUSHB_1 */
+ /* 3 */
+ 0x25, /* CINDEX */
+ },
+ /* #8 TypeMan Talk Align */
+ {
+ 0x06, /* SPVTL */
+ 0x7D, /* RDTG */
+ },
+ };
+ FT_UShort opcode_patterns = 9;
+ FT_UShort opcode_pointer[9] = { 0, 0, 0, 0, 0, 0, 0, 0, 0 };
+ FT_UShort opcode_size[9] = { 12, 8, 8, 6, 7, 4, 5, 4, 2 };
+ FT_UShort i;
+#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
+
+
+ /* some font programs are broken enough to redefine functions! */
+ /* We will then parse the current table. */
+
+ rec = exc->FDefs;
+ limit = rec + exc->numFDefs;
+ n = (FT_ULong)args[0];
+
+ for ( ; rec < limit; rec++ )
+ {
+ if ( rec->opc == n )
+ break;
+ }
+
+ if ( rec == limit )
+ {
+ /* check that there is enough room for new functions */
+ if ( exc->numFDefs >= exc->maxFDefs )
+ {
+ exc->error = FT_THROW( Too_Many_Function_Defs );
+ return;
+ }
+ exc->numFDefs++;
+ }
+
+ /* Although FDEF takes unsigned 32-bit integer, */
+ /* func # must be within unsigned 16-bit integer */
+ if ( n > 0xFFFFU )
+ {
+ exc->error = FT_THROW( Too_Many_Function_Defs );
+ return;
+ }
+
+ rec->range = exc->curRange;
+ rec->opc = (FT_UInt16)n;
+ rec->start = exc->IP + 1;
+ rec->active = TRUE;
+ rec->inline_delta = FALSE;
+ rec->sph_fdef_flags = 0x0000;
+
+ if ( n > exc->maxFunc )
+ exc->maxFunc = (FT_UInt16)n;
+
+#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
+ /* We don't know for sure these are typeman functions, */
+ /* however they are only active when RS 22 is called */
+ if ( n >= 64 && n <= 66 )
+ rec->sph_fdef_flags |= SPH_FDEF_TYPEMAN_STROKES;
+#endif
+
+ /* Now skip the whole function definition. */
+ /* We don't allow nested IDEFS & FDEFs. */
+
+ while ( SkipCode( exc ) == SUCCESS )
+ {
+
+#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
+
+ if ( SUBPIXEL_HINTING )
+ {
+ for ( i = 0; i < opcode_patterns; i++ )
+ {
+ if ( opcode_pointer[i] < opcode_size[i] &&
+ exc->opcode == opcode_pattern[i][opcode_pointer[i]] )
+ {
+ opcode_pointer[i] += 1;
+
+ if ( opcode_pointer[i] == opcode_size[i] )
+ {
+ FT_TRACE6(( "sph: Function %d, opcode ptrn: %d, %s %s\n",
+ i, n,
+ exc->face->root.family_name,
+ exc->face->root.style_name ));
+
+ switch ( i )
+ {
+ case 0:
+ rec->sph_fdef_flags |= SPH_FDEF_INLINE_DELTA_1;
+ exc->face->sph_found_func_flags |= SPH_FDEF_INLINE_DELTA_1;
+ break;
+
+ case 1:
+ rec->sph_fdef_flags |= SPH_FDEF_INLINE_DELTA_2;
+ exc->face->sph_found_func_flags |= SPH_FDEF_INLINE_DELTA_2;
+ break;
+
+ case 2:
+ switch ( n )
+ {
+ /* needs to be implemented still */
+ case 58:
+ rec->sph_fdef_flags |= SPH_FDEF_DIAGONAL_STROKE;
+ exc->face->sph_found_func_flags |= SPH_FDEF_DIAGONAL_STROKE;
+ }
+ break;
+
+ case 3:
+ switch ( n )
+ {
+ case 0:
+ rec->sph_fdef_flags |= SPH_FDEF_VACUFORM_ROUND_1;
+ exc->face->sph_found_func_flags |= SPH_FDEF_VACUFORM_ROUND_1;
+ }
+ break;
+
+ case 4:
+ /* probably not necessary to detect anymore */
+ rec->sph_fdef_flags |= SPH_FDEF_TTFAUTOHINT_1;
+ exc->face->sph_found_func_flags |= SPH_FDEF_TTFAUTOHINT_1;
+ break;
+
+ case 5:
+ switch ( n )
+ {
+ case 0:
+ case 1:
+ case 2:
+ case 4:
+ case 7:
+ case 8:
+ rec->sph_fdef_flags |= SPH_FDEF_SPACING_1;
+ exc->face->sph_found_func_flags |= SPH_FDEF_SPACING_1;
+ }
+ break;
+
+ case 6:
+ switch ( n )
+ {
+ case 0:
+ case 1:
+ case 2:
+ case 4:
+ case 7:
+ case 8:
+ rec->sph_fdef_flags |= SPH_FDEF_SPACING_2;
+ exc->face->sph_found_func_flags |= SPH_FDEF_SPACING_2;
+ }
+ break;
+
+ case 7:
+ rec->sph_fdef_flags |= SPH_FDEF_TYPEMAN_DIAGENDCTRL;
+ exc->face->sph_found_func_flags |= SPH_FDEF_TYPEMAN_DIAGENDCTRL;
+ break;
+
+ case 8:
+#if 0
+ rec->sph_fdef_flags |= SPH_FDEF_TYPEMAN_DIAGENDCTRL;
+ exc->face->sph_found_func_flags |= SPH_FDEF_TYPEMAN_DIAGENDCTRL;
+#endif
+ break;
+ }
+ opcode_pointer[i] = 0;
+ }
+ }
+
+ else
+ opcode_pointer[i] = 0;
+ }
+
+ /* Set sph_compatibility_mode only when deltas are detected */
+ exc->face->sph_compatibility_mode =
+ ( ( exc->face->sph_found_func_flags & SPH_FDEF_INLINE_DELTA_1 ) |
+ ( exc->face->sph_found_func_flags & SPH_FDEF_INLINE_DELTA_2 ) );
+ }
+
+#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
+
+ switch ( exc->opcode )
+ {
+ case 0x89: /* IDEF */
+ case 0x2C: /* FDEF */
+ exc->error = FT_THROW( Nested_DEFS );
+ return;
+
+ case 0x2D: /* ENDF */
+ rec->end = exc->IP;
+ return;
+ }
+ }
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* ENDF[]: END Function definition */
+ /* Opcode range: 0x2D */
+ /* Stack: --> */
+ /* */
+ static void
+ Ins_ENDF( TT_ExecContext exc )
+ {
+ TT_CallRec* pRec;
+
+
+#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
+ exc->sph_in_func_flags = 0x0000;
+#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
+
+ if ( exc->callTop <= 0 ) /* We encountered an ENDF without a call */
+ {
+ exc->error = FT_THROW( ENDF_In_Exec_Stream );
+ return;
+ }
+
+ exc->callTop--;
+
+ pRec = &exc->callStack[exc->callTop];
+
+ pRec->Cur_Count--;
+
+ exc->step_ins = FALSE;
+
+ if ( pRec->Cur_Count > 0 )
+ {
+ exc->callTop++;
+ exc->IP = pRec->Def->start;
+ }
+ else
+ /* Loop through the current function */
+ Ins_Goto_CodeRange( exc, pRec->Caller_Range, pRec->Caller_IP );
+
+ /* Exit the current call frame. */
+
+ /* NOTE: If the last instruction of a program is a */
+ /* CALL or LOOPCALL, the return address is */
+ /* always out of the code range. This is a */
+ /* valid address, and it is why we do not test */
+ /* the result of Ins_Goto_CodeRange() here! */
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* CALL[]: CALL function */
+ /* Opcode range: 0x2B */
+ /* Stack: uint32? --> */
+ /* */
+ static void
+ Ins_CALL( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ FT_ULong F;
+ TT_CallRec* pCrec;
+ TT_DefRecord* def;
+
+
+ /* first of all, check the index */
+
+ F = (FT_ULong)args[0];
+ if ( BOUNDSL( F, exc->maxFunc + 1 ) )
+ goto Fail;
+
+ /* Except for some old Apple fonts, all functions in a TrueType */
+ /* font are defined in increasing order, starting from 0. This */
+ /* means that we normally have */
+ /* */
+ /* exc->maxFunc+1 == exc->numFDefs */
+ /* exc->FDefs[n].opc == n for n in 0..exc->maxFunc */
+ /* */
+ /* If this isn't true, we need to look up the function table. */
+
+ def = exc->FDefs + F;
+ if ( exc->maxFunc + 1 != exc->numFDefs || def->opc != F )
+ {
+ /* look up the FDefs table */
+ TT_DefRecord* limit;
+
+
+ def = exc->FDefs;
+ limit = def + exc->numFDefs;
+
+ while ( def < limit && def->opc != F )
+ def++;
+
+ if ( def == limit )
+ goto Fail;
+ }
+
+ /* check that the function is active */
+ if ( !def->active )
+ goto Fail;
+
+#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
+ if ( SUBPIXEL_HINTING &&
+ exc->ignore_x_mode &&
+ ( ( exc->iup_called &&
+ ( exc->sph_tweak_flags & SPH_TWEAK_NO_CALL_AFTER_IUP ) ) ||
+ ( def->sph_fdef_flags & SPH_FDEF_VACUFORM_ROUND_1 ) ) )
+ goto Fail;
+ else
+ exc->sph_in_func_flags = def->sph_fdef_flags;
+#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
+
+ /* check the call stack */
+ if ( exc->callTop >= exc->callSize )
+ {
+ exc->error = FT_THROW( Stack_Overflow );
+ return;
+ }
+
+ pCrec = exc->callStack + exc->callTop;
+
+ pCrec->Caller_Range = exc->curRange;
+ pCrec->Caller_IP = exc->IP + 1;
+ pCrec->Cur_Count = 1;
+ pCrec->Def = def;
+
+ exc->callTop++;
+
+ Ins_Goto_CodeRange( exc, def->range, def->start );
+
+ exc->step_ins = FALSE;
+
+ return;
+
+ Fail:
+ exc->error = FT_THROW( Invalid_Reference );
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* LOOPCALL[]: LOOP and CALL function */
+ /* Opcode range: 0x2A */
+ /* Stack: uint32? Eint16? --> */
+ /* */
+ static void
+ Ins_LOOPCALL( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ FT_ULong F;
+ TT_CallRec* pCrec;
+ TT_DefRecord* def;
+
+
+ /* first of all, check the index */
+ F = (FT_ULong)args[1];
+ if ( BOUNDSL( F, exc->maxFunc + 1 ) )
+ goto Fail;
+
+ /* Except for some old Apple fonts, all functions in a TrueType */
+ /* font are defined in increasing order, starting from 0. This */
+ /* means that we normally have */
+ /* */
+ /* exc->maxFunc+1 == exc->numFDefs */
+ /* exc->FDefs[n].opc == n for n in 0..exc->maxFunc */
+ /* */
+ /* If this isn't true, we need to look up the function table. */
+
+ def = exc->FDefs + F;
+ if ( exc->maxFunc + 1 != exc->numFDefs || def->opc != F )
+ {
+ /* look up the FDefs table */
+ TT_DefRecord* limit;
+
+
+ def = exc->FDefs;
+ limit = def + exc->numFDefs;
+
+ while ( def < limit && def->opc != F )
+ def++;
+
+ if ( def == limit )
+ goto Fail;
+ }
+
+ /* check that the function is active */
+ if ( !def->active )
+ goto Fail;
+
+#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
+ if ( SUBPIXEL_HINTING &&
+ exc->ignore_x_mode &&
+ ( def->sph_fdef_flags & SPH_FDEF_VACUFORM_ROUND_1 ) )
+ goto Fail;
+ else
+ exc->sph_in_func_flags = def->sph_fdef_flags;
+#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
+
+ /* check stack */
+ if ( exc->callTop >= exc->callSize )
+ {
+ exc->error = FT_THROW( Stack_Overflow );
+ return;
+ }
+
+ if ( args[0] > 0 )
+ {
+ pCrec = exc->callStack + exc->callTop;
+
+ pCrec->Caller_Range = exc->curRange;
+ pCrec->Caller_IP = exc->IP + 1;
+ pCrec->Cur_Count = (FT_Int)args[0];
+ pCrec->Def = def;
+
+ exc->callTop++;
+
+ Ins_Goto_CodeRange( exc, def->range, def->start );
+
+ exc->step_ins = FALSE;
+ }
+
+ return;
+
+ Fail:
+ exc->error = FT_THROW( Invalid_Reference );
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* IDEF[]: Instruction DEFinition */
+ /* Opcode range: 0x89 */
+ /* Stack: Eint8 --> */
+ /* */
+ static void
+ Ins_IDEF( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ TT_DefRecord* def;
+ TT_DefRecord* limit;
+
+
+ /* First of all, look for the same function in our table */
+
+ def = exc->IDefs;
+ limit = def + exc->numIDefs;
+
+ for ( ; def < limit; def++ )
+ if ( def->opc == (FT_ULong)args[0] )
+ break;
+
+ if ( def == limit )
+ {
+ /* check that there is enough room for a new instruction */
+ if ( exc->numIDefs >= exc->maxIDefs )
+ {
+ exc->error = FT_THROW( Too_Many_Instruction_Defs );
+ return;
+ }
+ exc->numIDefs++;
+ }
+
+ /* opcode must be unsigned 8-bit integer */
+ if ( 0 > args[0] || args[0] > 0x00FF )
+ {
+ exc->error = FT_THROW( Too_Many_Instruction_Defs );
+ return;
+ }
+
+ def->opc = (FT_Byte)args[0];
+ def->start = exc->IP + 1;
+ def->range = exc->curRange;
+ def->active = TRUE;
+
+ if ( (FT_ULong)args[0] > exc->maxIns )
+ exc->maxIns = (FT_Byte)args[0];
+
+ /* Now skip the whole function definition. */
+ /* We don't allow nested IDEFs & FDEFs. */
+
+ while ( SkipCode( exc ) == SUCCESS )
+ {
+ switch ( exc->opcode )
+ {
+ case 0x89: /* IDEF */
+ case 0x2C: /* FDEF */
+ exc->error = FT_THROW( Nested_DEFS );
+ return;
+ case 0x2D: /* ENDF */
+ return;
+ }
+ }
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* PUSHING DATA ONTO THE INTERPRETER STACK */
+ /* */
+ /*************************************************************************/
+
+
+ /*************************************************************************/
+ /* */
+ /* NPUSHB[]: PUSH N Bytes */
+ /* Opcode range: 0x40 */
+ /* Stack: --> uint32... */
+ /* */
+ static void
+ Ins_NPUSHB( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ FT_UShort L, K;
+
+
+ L = (FT_UShort)exc->code[exc->IP + 1];
+
+ if ( BOUNDS( L, exc->stackSize + 1 - exc->top ) )
+ {
+ exc->error = FT_THROW( Stack_Overflow );
+ return;
+ }
+
+ for ( K = 1; K <= L; K++ )
+ args[K - 1] = exc->code[exc->IP + K + 1];
+
+ exc->new_top += L;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* NPUSHW[]: PUSH N Words */
+ /* Opcode range: 0x41 */
+ /* Stack: --> int32... */
+ /* */
+ static void
+ Ins_NPUSHW( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ FT_UShort L, K;
+
+
+ L = (FT_UShort)exc->code[exc->IP + 1];
+
+ if ( BOUNDS( L, exc->stackSize + 1 - exc->top ) )
+ {
+ exc->error = FT_THROW( Stack_Overflow );
+ return;
+ }
+
+ exc->IP += 2;
+
+ for ( K = 0; K < L; K++ )
+ args[K] = GetShortIns( exc );
+
+ exc->step_ins = FALSE;
+ exc->new_top += L;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* PUSHB[abc]: PUSH Bytes */
+ /* Opcode range: 0xB0-0xB7 */
+ /* Stack: --> uint32... */
+ /* */
+ static void
+ Ins_PUSHB( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ FT_UShort L, K;
+
+
+ L = (FT_UShort)( exc->opcode - 0xB0 + 1 );
+
+ if ( BOUNDS( L, exc->stackSize + 1 - exc->top ) )
+ {
+ exc->error = FT_THROW( Stack_Overflow );
+ return;
+ }
+
+ for ( K = 1; K <= L; K++ )
+ args[K - 1] = exc->code[exc->IP + K];
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* PUSHW[abc]: PUSH Words */
+ /* Opcode range: 0xB8-0xBF */
+ /* Stack: --> int32... */
+ /* */
+ static void
+ Ins_PUSHW( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ FT_UShort L, K;
+
+
+ L = (FT_UShort)( exc->opcode - 0xB8 + 1 );
+
+ if ( BOUNDS( L, exc->stackSize + 1 - exc->top ) )
+ {
+ exc->error = FT_THROW( Stack_Overflow );
+ return;
+ }
+
+ exc->IP++;
+
+ for ( K = 0; K < L; K++ )
+ args[K] = GetShortIns( exc );
+
+ exc->step_ins = FALSE;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* MANAGING THE GRAPHICS STATE */
+ /* */
+ /*************************************************************************/
+
+
+ static FT_Bool
+ Ins_SxVTL( TT_ExecContext exc,
+ FT_UShort aIdx1,
+ FT_UShort aIdx2,
+ FT_UnitVector* Vec )
+ {
+ FT_Long A, B, C;
+ FT_Vector* p1;
+ FT_Vector* p2;
+
+ FT_Byte opcode = exc->opcode;
+
+
+ if ( BOUNDS( aIdx1, exc->zp2.n_points ) ||
+ BOUNDS( aIdx2, exc->zp1.n_points ) )
+ {
+ if ( exc->pedantic_hinting )
+ exc->error = FT_THROW( Invalid_Reference );
+ return FAILURE;
+ }
+
+ p1 = exc->zp1.cur + aIdx2;
+ p2 = exc->zp2.cur + aIdx1;
+
+ A = p1->x - p2->x;
+ B = p1->y - p2->y;
+
+ /* If p1 == p2, SPvTL and SFvTL behave the same as */
+ /* SPvTCA[X] and SFvTCA[X], respectively. */
+ /* */
+ /* Confirmed by Greg Hitchcock. */
+
+ if ( A == 0 && B == 0 )
+ {
+ A = 0x4000;
+ opcode = 0;
+ }
+
+ if ( ( opcode & 1 ) != 0 )
+ {
+ C = B; /* counter clockwise rotation */
+ B = A;
+ A = -C;
+ }
+
+ Normalize( A, B, Vec );
+
+ return SUCCESS;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* SVTCA[a]: Set (F and P) Vectors to Coordinate Axis */
+ /* Opcode range: 0x00-0x01 */
+ /* Stack: --> */
+ /* */
+ /* SPvTCA[a]: Set PVector to Coordinate Axis */
+ /* Opcode range: 0x02-0x03 */
+ /* Stack: --> */
+ /* */
+ /* SFvTCA[a]: Set FVector to Coordinate Axis */
+ /* Opcode range: 0x04-0x05 */
+ /* Stack: --> */
+ /* */
+ static void
+ Ins_SxyTCA( TT_ExecContext exc )
+ {
+ FT_Short AA, BB;
+
+ FT_Byte opcode = exc->opcode;
+
+
+ AA = (FT_Short)( ( opcode & 1 ) << 14 );
+ BB = (FT_Short)( AA ^ 0x4000 );
+
+ if ( opcode < 4 )
+ {
+ exc->GS.projVector.x = AA;
+ exc->GS.projVector.y = BB;
+
+ exc->GS.dualVector.x = AA;
+ exc->GS.dualVector.y = BB;
+ }
+ else
+ GUESS_VECTOR( projVector );
+
+ if ( ( opcode & 2 ) == 0 )
+ {
+ exc->GS.freeVector.x = AA;
+ exc->GS.freeVector.y = BB;
+ }
+ else
+ GUESS_VECTOR( freeVector );
+
+ Compute_Funcs( exc );
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* SPvTL[a]: Set PVector To Line */
+ /* Opcode range: 0x06-0x07 */
+ /* Stack: uint32 uint32 --> */
+ /* */
+ static void
+ Ins_SPVTL( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ if ( Ins_SxVTL( exc,
+ (FT_UShort)args[1],
+ (FT_UShort)args[0],
+ &exc->GS.projVector ) == SUCCESS )
+ {
+ exc->GS.dualVector = exc->GS.projVector;
+ GUESS_VECTOR( freeVector );
+ Compute_Funcs( exc );
+ }
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* SFvTL[a]: Set FVector To Line */
+ /* Opcode range: 0x08-0x09 */
+ /* Stack: uint32 uint32 --> */
+ /* */
+ static void
+ Ins_SFVTL( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ if ( Ins_SxVTL( exc,
+ (FT_UShort)args[1],
+ (FT_UShort)args[0],
+ &exc->GS.freeVector ) == SUCCESS )
+ {
+ GUESS_VECTOR( projVector );
+ Compute_Funcs( exc );
+ }
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* SFvTPv[]: Set FVector To PVector */
+ /* Opcode range: 0x0E */
+ /* Stack: --> */
+ /* */
+ static void
+ Ins_SFVTPV( TT_ExecContext exc )
+ {
+ GUESS_VECTOR( projVector );
+ exc->GS.freeVector = exc->GS.projVector;
+ Compute_Funcs( exc );
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* SPvFS[]: Set PVector From Stack */
+ /* Opcode range: 0x0A */
+ /* Stack: f2.14 f2.14 --> */
+ /* */
+ static void
+ Ins_SPVFS( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ FT_Short S;
+ FT_Long X, Y;
+
+
+ /* Only use low 16bits, then sign extend */
+ S = (FT_Short)args[1];
+ Y = (FT_Long)S;
+ S = (FT_Short)args[0];
+ X = (FT_Long)S;
+
+ Normalize( X, Y, &exc->GS.projVector );
+
+ exc->GS.dualVector = exc->GS.projVector;
+ GUESS_VECTOR( freeVector );
+ Compute_Funcs( exc );
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* SFvFS[]: Set FVector From Stack */
+ /* Opcode range: 0x0B */
+ /* Stack: f2.14 f2.14 --> */
+ /* */
+ static void
+ Ins_SFVFS( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ FT_Short S;
+ FT_Long X, Y;
+
+
+ /* Only use low 16bits, then sign extend */
+ S = (FT_Short)args[1];
+ Y = (FT_Long)S;
+ S = (FT_Short)args[0];
+ X = S;
+
+ Normalize( X, Y, &exc->GS.freeVector );
+ GUESS_VECTOR( projVector );
+ Compute_Funcs( exc );
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* GPv[]: Get Projection Vector */
+ /* Opcode range: 0x0C */
+ /* Stack: ef2.14 --> ef2.14 */
+ /* */
+ static void
+ Ins_GPV( TT_ExecContext exc,
+ FT_Long* args )
+ {
+#ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING
+ if ( exc->face->unpatented_hinting )
+ {
+ args[0] = exc->GS.both_x_axis ? 0x4000 : 0;
+ args[1] = exc->GS.both_x_axis ? 0 : 0x4000;
+ }
+ else
+ {
+ args[0] = exc->GS.projVector.x;
+ args[1] = exc->GS.projVector.y;
+ }
+#else
+ args[0] = exc->GS.projVector.x;
+ args[1] = exc->GS.projVector.y;
+#endif
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* GFv[]: Get Freedom Vector */
+ /* Opcode range: 0x0D */
+ /* Stack: ef2.14 --> ef2.14 */
+ /* */
+ static void
+ Ins_GFV( TT_ExecContext exc,
+ FT_Long* args )
+ {
+#ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING
+ if ( exc->face->unpatented_hinting )
+ {
+ args[0] = exc->GS.both_x_axis ? 0x4000 : 0;
+ args[1] = exc->GS.both_x_axis ? 0 : 0x4000;
+ }
+ else
+ {
+ args[0] = exc->GS.freeVector.x;
+ args[1] = exc->GS.freeVector.y;
+ }
+#else
+ args[0] = exc->GS.freeVector.x;
+ args[1] = exc->GS.freeVector.y;
+#endif
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* SRP0[]: Set Reference Point 0 */
+ /* Opcode range: 0x10 */
+ /* Stack: uint32 --> */
+ /* */
+ static void
+ Ins_SRP0( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ exc->GS.rp0 = (FT_UShort)args[0];
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* SRP1[]: Set Reference Point 1 */
+ /* Opcode range: 0x11 */
+ /* Stack: uint32 --> */
+ /* */
+ static void
+ Ins_SRP1( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ exc->GS.rp1 = (FT_UShort)args[0];
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* SRP2[]: Set Reference Point 2 */
+ /* Opcode range: 0x12 */
+ /* Stack: uint32 --> */
+ /* */
+ static void
+ Ins_SRP2( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ exc->GS.rp2 = (FT_UShort)args[0];
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* SMD[]: Set Minimum Distance */
+ /* Opcode range: 0x1A */
+ /* Stack: f26.6 --> */
+ /* */
+ static void
+ Ins_SMD( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ exc->GS.minimum_distance = args[0];
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* SCVTCI[]: Set Control Value Table Cut In */
+ /* Opcode range: 0x1D */
+ /* Stack: f26.6 --> */
+ /* */
+ static void
+ Ins_SCVTCI( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ exc->GS.control_value_cutin = (FT_F26Dot6)args[0];
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* SSWCI[]: Set Single Width Cut In */
+ /* Opcode range: 0x1E */
+ /* Stack: f26.6 --> */
+ /* */
+ static void
+ Ins_SSWCI( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ exc->GS.single_width_cutin = (FT_F26Dot6)args[0];
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* SSW[]: Set Single Width */
+ /* Opcode range: 0x1F */
+ /* Stack: int32? --> */
+ /* */
+ static void
+ Ins_SSW( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ exc->GS.single_width_value = FT_MulFix( args[0],
+ exc->tt_metrics.scale );
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* FLIPON[]: Set auto-FLIP to ON */
+ /* Opcode range: 0x4D */
+ /* Stack: --> */
+ /* */
+ static void
+ Ins_FLIPON( TT_ExecContext exc )
+ {
+ exc->GS.auto_flip = TRUE;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* FLIPOFF[]: Set auto-FLIP to OFF */
+ /* Opcode range: 0x4E */
+ /* Stack: --> */
+ /* */
+ static void
+ Ins_FLIPOFF( TT_ExecContext exc )
+ {
+ exc->GS.auto_flip = FALSE;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* SANGW[]: Set ANGle Weight */
+ /* Opcode range: 0x7E */
+ /* Stack: uint32 --> */
+ /* */
+ static void
+ Ins_SANGW( void )
+ {
+ /* instruction not supported anymore */
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* SDB[]: Set Delta Base */
+ /* Opcode range: 0x5E */
+ /* Stack: uint32 --> */
+ /* */
+ static void
+ Ins_SDB( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ exc->GS.delta_base = (FT_UShort)args[0];
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* SDS[]: Set Delta Shift */
+ /* Opcode range: 0x5F */
+ /* Stack: uint32 --> */
+ /* */
+ static void
+ Ins_SDS( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ if ( (FT_ULong)args[0] > 6UL )
+ exc->error = FT_THROW( Bad_Argument );
+ else
+ exc->GS.delta_shift = (FT_UShort)args[0];
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* RTHG[]: Round To Half Grid */
+ /* Opcode range: 0x19 */
+ /* Stack: --> */
+ /* */
+ static void
+ Ins_RTHG( TT_ExecContext exc )
+ {
+ exc->GS.round_state = TT_Round_To_Half_Grid;
+ exc->func_round = (TT_Round_Func)Round_To_Half_Grid;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* RTG[]: Round To Grid */
+ /* Opcode range: 0x18 */
+ /* Stack: --> */
+ /* */
+ static void
+ Ins_RTG( TT_ExecContext exc )
+ {
+ exc->GS.round_state = TT_Round_To_Grid;
+ exc->func_round = (TT_Round_Func)Round_To_Grid;
+ }
+
+
+ /*************************************************************************/
+ /* RTDG[]: Round To Double Grid */
+ /* Opcode range: 0x3D */
+ /* Stack: --> */
+ /* */
+ static void
+ Ins_RTDG( TT_ExecContext exc )
+ {
+ exc->GS.round_state = TT_Round_To_Double_Grid;
+ exc->func_round = (TT_Round_Func)Round_To_Double_Grid;
+ }
+
+
+ /*************************************************************************/
+ /* RUTG[]: Round Up To Grid */
+ /* Opcode range: 0x7C */
+ /* Stack: --> */
+ /* */
+ static void
+ Ins_RUTG( TT_ExecContext exc )
+ {
+ exc->GS.round_state = TT_Round_Up_To_Grid;
+ exc->func_round = (TT_Round_Func)Round_Up_To_Grid;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* RDTG[]: Round Down To Grid */
+ /* Opcode range: 0x7D */
+ /* Stack: --> */
+ /* */
+ static void
+ Ins_RDTG( TT_ExecContext exc )
+ {
+ exc->GS.round_state = TT_Round_Down_To_Grid;
+ exc->func_round = (TT_Round_Func)Round_Down_To_Grid;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* ROFF[]: Round OFF */
+ /* Opcode range: 0x7A */
+ /* Stack: --> */
+ /* */
+ static void
+ Ins_ROFF( TT_ExecContext exc )
+ {
+ exc->GS.round_state = TT_Round_Off;
+ exc->func_round = (TT_Round_Func)Round_None;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* SROUND[]: Super ROUND */
+ /* Opcode range: 0x76 */
+ /* Stack: Eint8 --> */
+ /* */
+ static void
+ Ins_SROUND( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ SetSuperRound( exc, 0x4000, args[0] );
+
+ exc->GS.round_state = TT_Round_Super;
+ exc->func_round = (TT_Round_Func)Round_Super;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* S45ROUND[]: Super ROUND 45 degrees */
+ /* Opcode range: 0x77 */
+ /* Stack: uint32 --> */
+ /* */
+ static void
+ Ins_S45ROUND( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ SetSuperRound( exc, 0x2D41, args[0] );
+
+ exc->GS.round_state = TT_Round_Super_45;
+ exc->func_round = (TT_Round_Func)Round_Super_45;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* GC[a]: Get Coordinate projected onto */
+ /* Opcode range: 0x46-0x47 */
+ /* Stack: uint32 --> f26.6 */
+ /* */
+ /* XXX: UNDOCUMENTED: Measures from the original glyph must be taken */
+ /* along the dual projection vector! */
+ /* */
+ static void
+ Ins_GC( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ FT_ULong L;
+ FT_F26Dot6 R;
+
+
+ L = (FT_ULong)args[0];
+
+ if ( BOUNDSL( L, exc->zp2.n_points ) )
+ {
+ if ( exc->pedantic_hinting )
+ exc->error = FT_THROW( Invalid_Reference );
+ R = 0;
+ }
+ else
+ {
+ if ( exc->opcode & 1 )
+ R = FAST_DUALPROJ( &exc->zp2.org[L] );
+ else
+ R = FAST_PROJECT( &exc->zp2.cur[L] );
+ }
+
+ args[0] = R;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* SCFS[]: Set Coordinate From Stack */
+ /* Opcode range: 0x48 */
+ /* Stack: f26.6 uint32 --> */
+ /* */
+ /* Formula: */
+ /* */
+ /* OA := OA + ( value - OA.p )/( f.p ) * f */
+ /* */
+ static void
+ Ins_SCFS( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ FT_Long K;
+ FT_UShort L;
+
+
+ L = (FT_UShort)args[0];
+
+ if ( BOUNDS( L, exc->zp2.n_points ) )
+ {
+ if ( exc->pedantic_hinting )
+ exc->error = FT_THROW( Invalid_Reference );
+ return;
+ }
+
+ K = FAST_PROJECT( &exc->zp2.cur[L] );
+
+ exc->func_move( exc, &exc->zp2, L, args[1] - K );
+
+ /* UNDOCUMENTED! The MS rasterizer does that with */
+ /* twilight points (confirmed by Greg Hitchcock) */
+ if ( exc->GS.gep2 == 0 )
+ exc->zp2.org[L] = exc->zp2.cur[L];
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* MD[a]: Measure Distance */
+ /* Opcode range: 0x49-0x4A */
+ /* Stack: uint32 uint32 --> f26.6 */
+ /* */
+ /* XXX: UNDOCUMENTED: Measure taken in the original glyph must be along */
+ /* the dual projection vector. */
+ /* */
+ /* XXX: UNDOCUMENTED: Flag attributes are inverted! */
+ /* 0 => measure distance in original outline */
+ /* 1 => measure distance in grid-fitted outline */
+ /* */
+ /* XXX: UNDOCUMENTED: `zp0 - zp1', and not `zp2 - zp1! */
+ /* */
+ static void
+ Ins_MD( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ FT_UShort K, L;
+ FT_F26Dot6 D;
+
+
+ K = (FT_UShort)args[1];
+ L = (FT_UShort)args[0];
+
+ if ( BOUNDS( L, exc->zp0.n_points ) ||
+ BOUNDS( K, exc->zp1.n_points ) )
+ {
+ if ( exc->pedantic_hinting )
+ exc->error = FT_THROW( Invalid_Reference );
+ D = 0;
+ }
+ else
+ {
+ if ( exc->opcode & 1 )
+ D = PROJECT( exc->zp0.cur + L, exc->zp1.cur + K );
+ else
+ {
+ /* XXX: UNDOCUMENTED: twilight zone special case */
+
+ if ( exc->GS.gep0 == 0 || exc->GS.gep1 == 0 )
+ {
+ FT_Vector* vec1 = exc->zp0.org + L;
+ FT_Vector* vec2 = exc->zp1.org + K;
+
+
+ D = DUALPROJ( vec1, vec2 );
+ }
+ else
+ {
+ FT_Vector* vec1 = exc->zp0.orus + L;
+ FT_Vector* vec2 = exc->zp1.orus + K;
+
+
+ if ( exc->metrics.x_scale == exc->metrics.y_scale )
+ {
+ /* this should be faster */
+ D = DUALPROJ( vec1, vec2 );
+ D = FT_MulFix( D, exc->metrics.x_scale );
+ }
+ else
+ {
+ FT_Vector vec;
+
+
+ vec.x = FT_MulFix( vec1->x - vec2->x, exc->metrics.x_scale );
+ vec.y = FT_MulFix( vec1->y - vec2->y, exc->metrics.y_scale );
+
+ D = FAST_DUALPROJ( &vec );
+ }
+ }
+ }
+ }
+
+#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
+ /* Disable Type 2 Vacuform Rounds - e.g. Arial Narrow */
+ if ( SUBPIXEL_HINTING &&
+ exc->ignore_x_mode &&
+ FT_ABS( D ) == 64 )
+ D += 1;
+#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
+
+ args[0] = D;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* SDPvTL[a]: Set Dual PVector to Line */
+ /* Opcode range: 0x86-0x87 */
+ /* Stack: uint32 uint32 --> */
+ /* */
+ static void
+ Ins_SDPVTL( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ FT_Long A, B, C;
+ FT_UShort p1, p2; /* was FT_Int in pas type ERROR */
+
+ FT_Byte opcode = exc->opcode;
+
+
+ p1 = (FT_UShort)args[1];
+ p2 = (FT_UShort)args[0];
+
+ if ( BOUNDS( p2, exc->zp1.n_points ) ||
+ BOUNDS( p1, exc->zp2.n_points ) )
+ {
+ if ( exc->pedantic_hinting )
+ exc->error = FT_THROW( Invalid_Reference );
+ return;
+ }
+
+ {
+ FT_Vector* v1 = exc->zp1.org + p2;
+ FT_Vector* v2 = exc->zp2.org + p1;
+
+
+ A = v1->x - v2->x;
+ B = v1->y - v2->y;
+
+ /* If v1 == v2, SDPvTL behaves the same as */
+ /* SVTCA[X], respectively. */
+ /* */
+ /* Confirmed by Greg Hitchcock. */
+
+ if ( A == 0 && B == 0 )
+ {
+ A = 0x4000;
+ opcode = 0;
+ }
+ }
+
+ if ( ( opcode & 1 ) != 0 )
+ {
+ C = B; /* counter clockwise rotation */
+ B = A;
+ A = -C;
+ }
+
+ Normalize( A, B, &exc->GS.dualVector );
+
+ {
+ FT_Vector* v1 = exc->zp1.cur + p2;
+ FT_Vector* v2 = exc->zp2.cur + p1;
+
+
+ A = v1->x - v2->x;
+ B = v1->y - v2->y;
+
+ if ( A == 0 && B == 0 )
+ {
+ A = 0x4000;
+ opcode = 0;
+ }
+ }
+
+ if ( ( opcode & 1 ) != 0 )
+ {
+ C = B; /* counter clockwise rotation */
+ B = A;
+ A = -C;
+ }
+
+ Normalize( A, B, &exc->GS.projVector );
+ GUESS_VECTOR( freeVector );
+ Compute_Funcs( exc );
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* SZP0[]: Set Zone Pointer 0 */
+ /* Opcode range: 0x13 */
+ /* Stack: uint32 --> */
+ /* */
+ static void
+ Ins_SZP0( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ switch ( (FT_Int)args[0] )
+ {
+ case 0:
+ exc->zp0 = exc->twilight;
+ break;
+
+ case 1:
+ exc->zp0 = exc->pts;
+ break;
+
+ default:
+ if ( exc->pedantic_hinting )
+ exc->error = FT_THROW( Invalid_Reference );
+ return;
+ }
+
+ exc->GS.gep0 = (FT_UShort)args[0];
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* SZP1[]: Set Zone Pointer 1 */
+ /* Opcode range: 0x14 */
+ /* Stack: uint32 --> */
+ /* */
+ static void
+ Ins_SZP1( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ switch ( (FT_Int)args[0] )
+ {
+ case 0:
+ exc->zp1 = exc->twilight;
+ break;
+
+ case 1:
+ exc->zp1 = exc->pts;
+ break;
+
+ default:
+ if ( exc->pedantic_hinting )
+ exc->error = FT_THROW( Invalid_Reference );
+ return;
+ }
+
+ exc->GS.gep1 = (FT_UShort)args[0];
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* SZP2[]: Set Zone Pointer 2 */
+ /* Opcode range: 0x15 */
+ /* Stack: uint32 --> */
+ /* */
+ static void
+ Ins_SZP2( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ switch ( (FT_Int)args[0] )
+ {
+ case 0:
+ exc->zp2 = exc->twilight;
+ break;
+
+ case 1:
+ exc->zp2 = exc->pts;
+ break;
+
+ default:
+ if ( exc->pedantic_hinting )
+ exc->error = FT_THROW( Invalid_Reference );
+ return;
+ }
+
+ exc->GS.gep2 = (FT_UShort)args[0];
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* SZPS[]: Set Zone PointerS */
+ /* Opcode range: 0x16 */
+ /* Stack: uint32 --> */
+ /* */
+ static void
+ Ins_SZPS( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ switch ( (FT_Int)args[0] )
+ {
+ case 0:
+ exc->zp0 = exc->twilight;
+ break;
+
+ case 1:
+ exc->zp0 = exc->pts;
+ break;
+
+ default:
+ if ( exc->pedantic_hinting )
+ exc->error = FT_THROW( Invalid_Reference );
+ return;
+ }
+
+ exc->zp1 = exc->zp0;
+ exc->zp2 = exc->zp0;
+
+ exc->GS.gep0 = (FT_UShort)args[0];
+ exc->GS.gep1 = (FT_UShort)args[0];
+ exc->GS.gep2 = (FT_UShort)args[0];
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* INSTCTRL[]: INSTruction ConTRoL */
+ /* Opcode range: 0x8E */
+ /* Stack: int32 int32 --> */
+ /* */
+ static void
+ Ins_INSTCTRL( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ FT_Long K, L, Kf;
+
+
+ K = args[1];
+ L = args[0];
+
+ /* selector values cannot be `OR'ed; */
+ /* they are indices starting with index 1, not flags */
+ if ( K < 1 || K > 3 )
+ {
+ if ( exc->pedantic_hinting )
+ exc->error = FT_THROW( Invalid_Reference );
+ return;
+ }
+
+ /* convert index to flag value */
+ Kf = 1 << ( K - 1 );
+
+ if ( L != 0 )
+ {
+ /* arguments to selectors look like flag values */
+ if ( L != Kf )
+ {
+ if ( exc->pedantic_hinting )
+ exc->error = FT_THROW( Invalid_Reference );
+ return;
+ }
+ }
+
+ exc->GS.instruct_control &= ~(FT_Byte)Kf;
+ exc->GS.instruct_control |= (FT_Byte)L;
+
+#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
+ /* INSTCTRL modifying flag 3 also has an effect */
+ /* outside of the CVT program */
+ if ( K == 3 )
+ exc->ignore_x_mode = FT_BOOL( L == 4 );
+#endif
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* SCANCTRL[]: SCAN ConTRoL */
+ /* Opcode range: 0x85 */
+ /* Stack: uint32? --> */
+ /* */
+ static void
+ Ins_SCANCTRL( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ FT_Int A;
+
+
+ /* Get Threshold */
+ A = (FT_Int)( args[0] & 0xFF );
+
+ if ( A == 0xFF )
+ {
+ exc->GS.scan_control = TRUE;
+ return;
+ }
+ else if ( A == 0 )
+ {
+ exc->GS.scan_control = FALSE;
+ return;
+ }
+
+ if ( ( args[0] & 0x100 ) != 0 && exc->tt_metrics.ppem <= A )
+ exc->GS.scan_control = TRUE;
+
+ if ( ( args[0] & 0x200 ) != 0 && exc->tt_metrics.rotated )
+ exc->GS.scan_control = TRUE;
+
+ if ( ( args[0] & 0x400 ) != 0 && exc->tt_metrics.stretched )
+ exc->GS.scan_control = TRUE;
+
+ if ( ( args[0] & 0x800 ) != 0 && exc->tt_metrics.ppem > A )
+ exc->GS.scan_control = FALSE;
+
+ if ( ( args[0] & 0x1000 ) != 0 && exc->tt_metrics.rotated )
+ exc->GS.scan_control = FALSE;
+
+ if ( ( args[0] & 0x2000 ) != 0 && exc->tt_metrics.stretched )
+ exc->GS.scan_control = FALSE;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* SCANTYPE[]: SCAN TYPE */
+ /* Opcode range: 0x8D */
+ /* Stack: uint32? --> */
+ /* */
+ static void
+ Ins_SCANTYPE( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ if ( args[0] >= 0 )
+ exc->GS.scan_type = (FT_Int)args[0];
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* MANAGING OUTLINES */
+ /* */
+ /*************************************************************************/
+
+
+ /*************************************************************************/
+ /* */
+ /* FLIPPT[]: FLIP PoinT */
+ /* Opcode range: 0x80 */
+ /* Stack: uint32... --> */
+ /* */
+ static void
+ Ins_FLIPPT( TT_ExecContext exc )
+ {
+ FT_UShort point;
+
+
+ if ( exc->top < exc->GS.loop )
+ {
+ if ( exc->pedantic_hinting )
+ exc->error = FT_THROW( Too_Few_Arguments );
+ goto Fail;
+ }
+
+ while ( exc->GS.loop > 0 )
+ {
+ exc->args--;
+
+ point = (FT_UShort)exc->stack[exc->args];
+
+ if ( BOUNDS( point, exc->pts.n_points ) )
+ {
+ if ( exc->pedantic_hinting )
+ {
+ exc->error = FT_THROW( Invalid_Reference );
+ return;
+ }
+ }
+ else
+ exc->pts.tags[point] ^= FT_CURVE_TAG_ON;
+
+ exc->GS.loop--;
+ }
+
+ Fail:
+ exc->GS.loop = 1;
+ exc->new_top = exc->args;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* FLIPRGON[]: FLIP RanGe ON */
+ /* Opcode range: 0x81 */
+ /* Stack: uint32 uint32 --> */
+ /* */
+ static void
+ Ins_FLIPRGON( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ FT_UShort I, K, L;
+
+
+ K = (FT_UShort)args[1];
+ L = (FT_UShort)args[0];
+
+ if ( BOUNDS( K, exc->pts.n_points ) ||
+ BOUNDS( L, exc->pts.n_points ) )
+ {
+ if ( exc->pedantic_hinting )
+ exc->error = FT_THROW( Invalid_Reference );
+ return;
+ }
+
+ for ( I = L; I <= K; I++ )
+ exc->pts.tags[I] |= FT_CURVE_TAG_ON;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* FLIPRGOFF: FLIP RanGe OFF */
+ /* Opcode range: 0x82 */
+ /* Stack: uint32 uint32 --> */
+ /* */
+ static void
+ Ins_FLIPRGOFF( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ FT_UShort I, K, L;
+
+
+ K = (FT_UShort)args[1];
+ L = (FT_UShort)args[0];
+
+ if ( BOUNDS( K, exc->pts.n_points ) ||
+ BOUNDS( L, exc->pts.n_points ) )
+ {
+ if ( exc->pedantic_hinting )
+ exc->error = FT_THROW( Invalid_Reference );
+ return;
+ }
+
+ for ( I = L; I <= K; I++ )
+ exc->pts.tags[I] &= ~FT_CURVE_TAG_ON;
+ }
+
+
+ static FT_Bool
+ Compute_Point_Displacement( TT_ExecContext exc,
+ FT_F26Dot6* x,
+ FT_F26Dot6* y,
+ TT_GlyphZone zone,
+ FT_UShort* refp )
+ {
+ TT_GlyphZoneRec zp;
+ FT_UShort p;
+ FT_F26Dot6 d;
+
+
+ if ( exc->opcode & 1 )
+ {
+ zp = exc->zp0;
+ p = exc->GS.rp1;
+ }
+ else
+ {
+ zp = exc->zp1;
+ p = exc->GS.rp2;
+ }
+
+ if ( BOUNDS( p, zp.n_points ) )
+ {
+ if ( exc->pedantic_hinting )
+ exc->error = FT_THROW( Invalid_Reference );
+ *refp = 0;
+ return FAILURE;
+ }
+
+ *zone = zp;
+ *refp = p;
+
+ d = PROJECT( zp.cur + p, zp.org + p );
+
+#ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING
+ if ( exc->face->unpatented_hinting )
+ {
+ if ( exc->GS.both_x_axis )
+ {
+ *x = d;
+ *y = 0;
+ }
+ else
+ {
+ *x = 0;
+ *y = d;
+ }
+ }
+ else
+#endif
+ {
+ *x = FT_MulDiv( d, (FT_Long)exc->GS.freeVector.x, exc->F_dot_P );
+ *y = FT_MulDiv( d, (FT_Long)exc->GS.freeVector.y, exc->F_dot_P );
+ }
+
+ return SUCCESS;
+ }
+
+
+ static void
+ Move_Zp2_Point( TT_ExecContext exc,
+ FT_UShort point,
+ FT_F26Dot6 dx,
+ FT_F26Dot6 dy,
+ FT_Bool touch )
+ {
+#ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING
+ if ( exc->face->unpatented_hinting )
+ {
+ if ( exc->GS.both_x_axis )
+ {
+ exc->zp2.cur[point].x += dx;
+ if ( touch )
+ exc->zp2.tags[point] |= FT_CURVE_TAG_TOUCH_X;
+ }
+ else
+ {
+ exc->zp2.cur[point].y += dy;
+ if ( touch )
+ exc->zp2.tags[point] |= FT_CURVE_TAG_TOUCH_Y;
+ }
+ return;
+ }
+#endif
+
+ if ( exc->GS.freeVector.x != 0 )
+ {
+ exc->zp2.cur[point].x += dx;
+ if ( touch )
+ exc->zp2.tags[point] |= FT_CURVE_TAG_TOUCH_X;
+ }
+
+ if ( exc->GS.freeVector.y != 0 )
+ {
+ exc->zp2.cur[point].y += dy;
+ if ( touch )
+ exc->zp2.tags[point] |= FT_CURVE_TAG_TOUCH_Y;
+ }
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* SHP[a]: SHift Point by the last point */
+ /* Opcode range: 0x32-0x33 */
+ /* Stack: uint32... --> */
+ /* */
+ static void
+ Ins_SHP( TT_ExecContext exc )
+ {
+ TT_GlyphZoneRec zp;
+ FT_UShort refp;
+
+ FT_F26Dot6 dx, dy;
+ FT_UShort point;
+
+
+ if ( exc->top < exc->GS.loop )
+ {
+ if ( exc->pedantic_hinting )
+ exc->error = FT_THROW( Invalid_Reference );
+ goto Fail;
+ }
+
+ if ( Compute_Point_Displacement( exc, &dx, &dy, &zp, &refp ) )
+ return;
+
+ while ( exc->GS.loop > 0 )
+ {
+ exc->args--;
+ point = (FT_UShort)exc->stack[exc->args];
+
+ if ( BOUNDS( point, exc->zp2.n_points ) )
+ {
+ if ( exc->pedantic_hinting )
+ {
+ exc->error = FT_THROW( Invalid_Reference );
+ return;
+ }
+ }
+ else
+#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
+ /* doesn't follow Cleartype spec but produces better result */
+ if ( SUBPIXEL_HINTING &&
+ exc->ignore_x_mode )
+ Move_Zp2_Point( exc, point, 0, dy, TRUE );
+ else
+#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
+ Move_Zp2_Point( exc, point, dx, dy, TRUE );
+
+ exc->GS.loop--;
+ }
+
+ Fail:
+ exc->GS.loop = 1;
+ exc->new_top = exc->args;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* SHC[a]: SHift Contour */
+ /* Opcode range: 0x34-35 */
+ /* Stack: uint32 --> */
+ /* */
+ /* UNDOCUMENTED: According to Greg Hitchcock, there is one (virtual) */
+ /* contour in the twilight zone, namely contour number */
+ /* zero which includes all points of it. */
+ /* */
+ static void
+ Ins_SHC( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ TT_GlyphZoneRec zp;
+ FT_UShort refp;
+ FT_F26Dot6 dx, dy;
+
+ FT_Short contour, bounds;
+ FT_UShort start, limit, i;
+
+
+ contour = (FT_Short)args[0];
+ bounds = ( exc->GS.gep2 == 0 ) ? 1 : exc->zp2.n_contours;
+
+ if ( BOUNDS( contour, bounds ) )
+ {
+ if ( exc->pedantic_hinting )
+ exc->error = FT_THROW( Invalid_Reference );
+ return;
+ }
+
+ if ( Compute_Point_Displacement( exc, &dx, &dy, &zp, &refp ) )
+ return;
+
+ if ( contour == 0 )
+ start = 0;
+ else
+ start = (FT_UShort)( exc->zp2.contours[contour - 1] + 1 -
+ exc->zp2.first_point );
+
+ /* we use the number of points if in the twilight zone */
+ if ( exc->GS.gep2 == 0 )
+ limit = exc->zp2.n_points;
+ else
+ limit = (FT_UShort)( exc->zp2.contours[contour] -
+ exc->zp2.first_point + 1 );
+
+ for ( i = start; i < limit; i++ )
+ {
+ if ( zp.cur != exc->zp2.cur || refp != i )
+ Move_Zp2_Point( exc, i, dx, dy, TRUE );
+ }
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* SHZ[a]: SHift Zone */
+ /* Opcode range: 0x36-37 */
+ /* Stack: uint32 --> */
+ /* */
+ static void
+ Ins_SHZ( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ TT_GlyphZoneRec zp;
+ FT_UShort refp;
+ FT_F26Dot6 dx,
+ dy;
+
+ FT_UShort limit, i;
+
+
+ if ( BOUNDS( args[0], 2 ) )
+ {
+ if ( exc->pedantic_hinting )
+ exc->error = FT_THROW( Invalid_Reference );
+ return;
+ }
+
+ if ( Compute_Point_Displacement( exc, &dx, &dy, &zp, &refp ) )
+ return;
+
+ /* XXX: UNDOCUMENTED! SHZ doesn't move the phantom points. */
+ /* Twilight zone has no real contours, so use `n_points'. */
+ /* Normal zone's `n_points' includes phantoms, so must */
+ /* use end of last contour. */
+ if ( exc->GS.gep2 == 0 )
+ limit = (FT_UShort)exc->zp2.n_points;
+ else if ( exc->GS.gep2 == 1 && exc->zp2.n_contours > 0 )
+ limit = (FT_UShort)( exc->zp2.contours[exc->zp2.n_contours - 1] + 1 );
+ else
+ limit = 0;
+
+ /* XXX: UNDOCUMENTED! SHZ doesn't touch the points */
+ for ( i = 0; i < limit; i++ )
+ {
+ if ( zp.cur != exc->zp2.cur || refp != i )
+ Move_Zp2_Point( exc, i, dx, dy, FALSE );
+ }
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* SHPIX[]: SHift points by a PIXel amount */
+ /* Opcode range: 0x38 */
+ /* Stack: f26.6 uint32... --> */
+ /* */
+ static void
+ Ins_SHPIX( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ FT_F26Dot6 dx, dy;
+ FT_UShort point;
+#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
+ FT_Int B1, B2;
+#endif
+
+
+ if ( exc->top < exc->GS.loop + 1 )
+ {
+ if ( exc->pedantic_hinting )
+ exc->error = FT_THROW( Invalid_Reference );
+ goto Fail;
+ }
+
+#ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING
+ if ( exc->face->unpatented_hinting )
+ {
+ if ( exc->GS.both_x_axis )
+ {
+ dx = (FT_UInt32)args[0];
+ dy = 0;
+ }
+ else
+ {
+ dx = 0;
+ dy = (FT_UInt32)args[0];
+ }
+ }
+ else
+#endif
+ {
+ dx = TT_MulFix14( args[0], exc->GS.freeVector.x );
+ dy = TT_MulFix14( args[0], exc->GS.freeVector.y );
+ }
+
+ while ( exc->GS.loop > 0 )
+ {
+ exc->args--;
+
+ point = (FT_UShort)exc->stack[exc->args];
+
+ if ( BOUNDS( point, exc->zp2.n_points ) )
+ {
+ if ( exc->pedantic_hinting )
+ {
+ exc->error = FT_THROW( Invalid_Reference );
+ return;
+ }
+ }
+ else
+#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
+ {
+ /* If not using ignore_x_mode rendering, allow ZP2 move. */
+ /* If inline deltas aren't allowed, skip ZP2 move. */
+ /* If using ignore_x_mode rendering, allow ZP2 point move if: */
+ /* - freedom vector is y and sph_compatibility_mode is off */
+ /* - the glyph is composite and the move is in the Y direction */
+ /* - the glyph is specifically set to allow SHPIX moves */
+ /* - the move is on a previously Y-touched point */
+
+ if ( SUBPIXEL_HINTING &&
+ exc->ignore_x_mode )
+ {
+ /* save point for later comparison */
+ if ( exc->GS.freeVector.y != 0 )
+ B1 = exc->zp2.cur[point].y;
+ else
+ B1 = exc->zp2.cur[point].x;
+
+ if ( !exc->face->sph_compatibility_mode &&
+ exc->GS.freeVector.y != 0 )
+ {
+ Move_Zp2_Point( exc, point, dx, dy, TRUE );
+
+ /* save new point */
+ if ( exc->GS.freeVector.y != 0 )
+ {
+ B2 = exc->zp2.cur[point].y;
+
+ /* reverse any disallowed moves */
+ if ( ( exc->sph_tweak_flags & SPH_TWEAK_SKIP_NONPIXEL_Y_MOVES ) &&
+ ( B1 & 63 ) != 0 &&
+ ( B2 & 63 ) != 0 &&
+ B1 != B2 )
+ Move_Zp2_Point( exc, point, -dx, -dy, TRUE );
+ }
+ }
+ else if ( exc->face->sph_compatibility_mode )
+ {
+ if ( exc->sph_tweak_flags & SPH_TWEAK_ROUND_NONPIXEL_Y_MOVES )
+ {
+ dx = FT_PIX_ROUND( B1 + dx ) - B1;
+ dy = FT_PIX_ROUND( B1 + dy ) - B1;
+ }
+
+ /* skip post-iup deltas */
+ if ( exc->iup_called &&
+ ( ( exc->sph_in_func_flags & SPH_FDEF_INLINE_DELTA_1 ) ||
+ ( exc->sph_in_func_flags & SPH_FDEF_INLINE_DELTA_2 ) ) )
+ goto Skip;
+
+ if ( !( exc->sph_tweak_flags & SPH_TWEAK_ALWAYS_SKIP_DELTAP ) &&
+ ( ( exc->is_composite && exc->GS.freeVector.y != 0 ) ||
+ ( exc->zp2.tags[point] & FT_CURVE_TAG_TOUCH_Y ) ||
+ ( exc->sph_tweak_flags & SPH_TWEAK_DO_SHPIX ) ) )
+ Move_Zp2_Point( exc, point, 0, dy, TRUE );
+
+ /* save new point */
+ if ( exc->GS.freeVector.y != 0 )
+ {
+ B2 = exc->zp2.cur[point].y;
+
+ /* reverse any disallowed moves */
+ if ( ( B1 & 63 ) == 0 &&
+ ( B2 & 63 ) != 0 &&
+ B1 != B2 )
+ Move_Zp2_Point( exc, point, 0, -dy, TRUE );
+ }
+ }
+ else if ( exc->sph_in_func_flags & SPH_FDEF_TYPEMAN_DIAGENDCTRL )
+ Move_Zp2_Point( exc, point, dx, dy, TRUE );
+ }
+ else
+ Move_Zp2_Point( exc, point, dx, dy, TRUE );
+ }
+
+ Skip:
+
+#else /* !TT_CONFIG_OPTION_SUBPIXEL_HINTING */
+
+ Move_Zp2_Point( exc, point, dx, dy, TRUE );
+
+#endif /* !TT_CONFIG_OPTION_SUBPIXEL_HINTING */
+
+ exc->GS.loop--;
+ }
+
+ Fail:
+ exc->GS.loop = 1;
+ exc->new_top = exc->args;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* MSIRP[a]: Move Stack Indirect Relative Position */
+ /* Opcode range: 0x3A-0x3B */
+ /* Stack: f26.6 uint32 --> */
+ /* */
+ static void
+ Ins_MSIRP( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ FT_UShort point;
+ FT_F26Dot6 distance;
+
+#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
+ FT_F26Dot6 control_value_cutin = 0; /* pacify compiler */
+
+
+ if ( SUBPIXEL_HINTING )
+ {
+ control_value_cutin = exc->GS.control_value_cutin;
+
+ if ( exc->ignore_x_mode &&
+ exc->GS.freeVector.x != 0 &&
+ !( exc->sph_tweak_flags & SPH_TWEAK_NORMAL_ROUND ) )
+ control_value_cutin = 0;
+ }
+
+#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
+
+ point = (FT_UShort)args[0];
+
+ if ( BOUNDS( point, exc->zp1.n_points ) ||
+ BOUNDS( exc->GS.rp0, exc->zp0.n_points ) )
+ {
+ if ( exc->pedantic_hinting )
+ exc->error = FT_THROW( Invalid_Reference );
+ return;
+ }
+
+ /* UNDOCUMENTED! The MS rasterizer does that with */
+ /* twilight points (confirmed by Greg Hitchcock) */
+ if ( exc->GS.gep1 == 0 )
+ {
+ exc->zp1.org[point] = exc->zp0.org[exc->GS.rp0];
+ exc->func_move_orig( exc, &exc->zp1, point, args[1] );
+ exc->zp1.cur[point] = exc->zp1.org[point];
+ }
+
+ distance = PROJECT( exc->zp1.cur + point, exc->zp0.cur + exc->GS.rp0 );
+
+#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
+ /* subpixel hinting - make MSIRP respect CVT cut-in; */
+ if ( SUBPIXEL_HINTING &&
+ exc->ignore_x_mode &&
+ exc->GS.freeVector.x != 0 &&
+ FT_ABS( distance - args[1] ) >= control_value_cutin )
+ distance = args[1];
+#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
+
+ exc->func_move( exc, &exc->zp1, point, args[1] - distance );
+
+ exc->GS.rp1 = exc->GS.rp0;
+ exc->GS.rp2 = point;
+
+ if ( ( exc->opcode & 1 ) != 0 )
+ exc->GS.rp0 = point;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* MDAP[a]: Move Direct Absolute Point */
+ /* Opcode range: 0x2E-0x2F */
+ /* Stack: uint32 --> */
+ /* */
+ static void
+ Ins_MDAP( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ FT_UShort point;
+ FT_F26Dot6 cur_dist;
+ FT_F26Dot6 distance;
+
+
+ point = (FT_UShort)args[0];
+
+ if ( BOUNDS( point, exc->zp0.n_points ) )
+ {
+ if ( exc->pedantic_hinting )
+ exc->error = FT_THROW( Invalid_Reference );
+ return;
+ }
+
+ if ( ( exc->opcode & 1 ) != 0 )
+ {
+ cur_dist = FAST_PROJECT( &exc->zp0.cur[point] );
+#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
+ if ( SUBPIXEL_HINTING &&
+ exc->ignore_x_mode &&
+ exc->GS.freeVector.x != 0 )
+ distance = Round_None(
+ exc,
+ cur_dist,
+ exc->tt_metrics.compensations[0] ) - cur_dist;
+ else
+#endif
+ distance = exc->func_round(
+ exc,
+ cur_dist,
+ exc->tt_metrics.compensations[0] ) - cur_dist;
+ }
+ else
+ distance = 0;
+
+ exc->func_move( exc, &exc->zp0, point, distance );
+
+ exc->GS.rp0 = point;
+ exc->GS.rp1 = point;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* MIAP[a]: Move Indirect Absolute Point */
+ /* Opcode range: 0x3E-0x3F */
+ /* Stack: uint32 uint32 --> */
+ /* */
+ static void
+ Ins_MIAP( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ FT_ULong cvtEntry;
+ FT_UShort point;
+ FT_F26Dot6 distance;
+ FT_F26Dot6 org_dist;
+ FT_F26Dot6 control_value_cutin;
+
+
+ control_value_cutin = exc->GS.control_value_cutin;
+ cvtEntry = (FT_ULong)args[1];
+ point = (FT_UShort)args[0];
+
+#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
+ if ( SUBPIXEL_HINTING &&
+ exc->ignore_x_mode &&
+ exc->GS.freeVector.x != 0 &&
+ exc->GS.freeVector.y == 0 &&
+ !( exc->sph_tweak_flags & SPH_TWEAK_NORMAL_ROUND ) )
+ control_value_cutin = 0;
+#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
+
+ if ( BOUNDS( point, exc->zp0.n_points ) ||
+ BOUNDSL( cvtEntry, exc->cvtSize ) )
+ {
+ if ( exc->pedantic_hinting )
+ exc->error = FT_THROW( Invalid_Reference );
+ goto Fail;
+ }
+
+ /* UNDOCUMENTED! */
+ /* */
+ /* The behaviour of an MIAP instruction is quite different when used */
+ /* in the twilight zone. */
+ /* */
+ /* First, no control value cut-in test is performed as it would fail */
+ /* anyway. Second, the original point, i.e. (org_x,org_y) of */
+ /* zp0.point, is set to the absolute, unrounded distance found in the */
+ /* CVT. */
+ /* */
+ /* This is used in the CVT programs of the Microsoft fonts Arial, */
+ /* Times, etc., in order to re-adjust some key font heights. It */
+ /* allows the use of the IP instruction in the twilight zone, which */
+ /* otherwise would be invalid according to the specification. */
+ /* */
+ /* We implement it with a special sequence for the twilight zone. */
+ /* This is a bad hack, but it seems to work. */
+ /* */
+ /* Confirmed by Greg Hitchcock. */
+
+ distance = exc->func_read_cvt( exc, cvtEntry );
+
+ if ( exc->GS.gep0 == 0 ) /* If in twilight zone */
+ {
+#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
+ /* Only adjust if not in sph_compatibility_mode or ignore_x_mode. */
+ /* Determined via experimentation and may be incorrect... */
+ if ( !SUBPIXEL_HINTING ||
+ ( !exc->ignore_x_mode ||
+ !exc->face->sph_compatibility_mode ) )
+#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
+ exc->zp0.org[point].x = TT_MulFix14( distance,
+ exc->GS.freeVector.x );
+ exc->zp0.org[point].y = TT_MulFix14( distance,
+ exc->GS.freeVector.y ),
+ exc->zp0.cur[point] = exc->zp0.org[point];
+ }
+#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
+ if ( SUBPIXEL_HINTING &&
+ exc->ignore_x_mode &&
+ ( exc->sph_tweak_flags & SPH_TWEAK_MIAP_HACK ) &&
+ distance > 0 &&
+ exc->GS.freeVector.y != 0 )
+ distance = 0;
+#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
+
+ org_dist = FAST_PROJECT( &exc->zp0.cur[point] );
+
+ if ( ( exc->opcode & 1 ) != 0 ) /* rounding and control cut-in flag */
+ {
+ if ( FT_ABS( distance - org_dist ) > control_value_cutin )
+ distance = org_dist;
+
+#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
+ if ( SUBPIXEL_HINTING &&
+ exc->ignore_x_mode &&
+ exc->GS.freeVector.x != 0 )
+ distance = Round_None( exc,
+ distance,
+ exc->tt_metrics.compensations[0] );
+ else
+#endif
+ distance = exc->func_round( exc,
+ distance,
+ exc->tt_metrics.compensations[0] );
+ }
+
+ exc->func_move( exc, &exc->zp0, point, distance - org_dist );
+
+ Fail:
+ exc->GS.rp0 = point;
+ exc->GS.rp1 = point;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* MDRP[abcde]: Move Direct Relative Point */
+ /* Opcode range: 0xC0-0xDF */
+ /* Stack: uint32 --> */
+ /* */
+ static void
+ Ins_MDRP( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ FT_UShort point;
+ FT_F26Dot6 org_dist, distance, minimum_distance;
+
+
+ minimum_distance = exc->GS.minimum_distance;
+
+#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
+ if ( SUBPIXEL_HINTING &&
+ exc->ignore_x_mode &&
+ exc->GS.freeVector.x != 0 &&
+ !( exc->sph_tweak_flags & SPH_TWEAK_NORMAL_ROUND ) )
+ minimum_distance = 0;
+#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
+
+ point = (FT_UShort)args[0];
+
+ if ( BOUNDS( point, exc->zp1.n_points ) ||
+ BOUNDS( exc->GS.rp0, exc->zp0.n_points ) )
+ {
+ if ( exc->pedantic_hinting )
+ exc->error = FT_THROW( Invalid_Reference );
+ goto Fail;
+ }
+
+ /* XXX: Is there some undocumented feature while in the */
+ /* twilight zone? */
+
+ /* XXX: UNDOCUMENTED: twilight zone special case */
+
+ if ( exc->GS.gep0 == 0 || exc->GS.gep1 == 0 )
+ {
+ FT_Vector* vec1 = &exc->zp1.org[point];
+ FT_Vector* vec2 = &exc->zp0.org[exc->GS.rp0];
+
+
+ org_dist = DUALPROJ( vec1, vec2 );
+ }
+ else
+ {
+ FT_Vector* vec1 = &exc->zp1.orus[point];
+ FT_Vector* vec2 = &exc->zp0.orus[exc->GS.rp0];
+
+
+ if ( exc->metrics.x_scale == exc->metrics.y_scale )
+ {
+ /* this should be faster */
+ org_dist = DUALPROJ( vec1, vec2 );
+ org_dist = FT_MulFix( org_dist, exc->metrics.x_scale );
+ }
+ else
+ {
+ FT_Vector vec;
+
+
+ vec.x = FT_MulFix( vec1->x - vec2->x, exc->metrics.x_scale );
+ vec.y = FT_MulFix( vec1->y - vec2->y, exc->metrics.y_scale );
+
+ org_dist = FAST_DUALPROJ( &vec );
+ }
+ }
+
+ /* single width cut-in test */
+
+ if ( FT_ABS( org_dist - exc->GS.single_width_value ) <
+ exc->GS.single_width_cutin )
+ {
+ if ( org_dist >= 0 )
+ org_dist = exc->GS.single_width_value;
+ else
+ org_dist = -exc->GS.single_width_value;
+ }
+
+ /* round flag */
+
+ if ( ( exc->opcode & 4 ) != 0 )
+ {
+#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
+ if ( SUBPIXEL_HINTING &&
+ exc->ignore_x_mode &&
+ exc->GS.freeVector.x != 0 )
+ distance = Round_None(
+ exc,
+ org_dist,
+ exc->tt_metrics.compensations[exc->opcode & 3] );
+ else
+#endif
+ distance = exc->func_round(
+ exc,
+ org_dist,
+ exc->tt_metrics.compensations[exc->opcode & 3] );
+ }
+ else
+ distance = Round_None(
+ exc,
+ org_dist,
+ exc->tt_metrics.compensations[exc->opcode & 3] );
+
+ /* minimum distance flag */
+
+ if ( ( exc->opcode & 8 ) != 0 )
+ {
+ if ( org_dist >= 0 )
+ {
+ if ( distance < minimum_distance )
+ distance = minimum_distance;
+ }
+ else
+ {
+ if ( distance > -minimum_distance )
+ distance = -minimum_distance;
+ }
+ }
+
+ /* now move the point */
+
+ org_dist = PROJECT( exc->zp1.cur + point, exc->zp0.cur + exc->GS.rp0 );
+
+ exc->func_move( exc, &exc->zp1, point, distance - org_dist );
+
+ Fail:
+ exc->GS.rp1 = exc->GS.rp0;
+ exc->GS.rp2 = point;
+
+ if ( ( exc->opcode & 16 ) != 0 )
+ exc->GS.rp0 = point;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* MIRP[abcde]: Move Indirect Relative Point */
+ /* Opcode range: 0xE0-0xFF */
+ /* Stack: int32? uint32 --> */
+ /* */
+ static void
+ Ins_MIRP( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ FT_UShort point;
+ FT_ULong cvtEntry;
+
+ FT_F26Dot6 cvt_dist,
+ distance,
+ cur_dist,
+ org_dist,
+ control_value_cutin,
+ minimum_distance;
+#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
+ FT_Int B1 = 0; /* pacify compiler */
+ FT_Int B2 = 0;
+ FT_Bool reverse_move = FALSE;
+#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
+
+
+ minimum_distance = exc->GS.minimum_distance;
+ control_value_cutin = exc->GS.control_value_cutin;
+ point = (FT_UShort)args[0];
+ cvtEntry = (FT_ULong)( args[1] + 1 );
+
+#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
+ if ( SUBPIXEL_HINTING &&
+ exc->ignore_x_mode &&
+ exc->GS.freeVector.x != 0 &&
+ !( exc->sph_tweak_flags & SPH_TWEAK_NORMAL_ROUND ) )
+ control_value_cutin = minimum_distance = 0;
+#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
+
+ /* XXX: UNDOCUMENTED! cvt[-1] = 0 always */
+
+ if ( BOUNDS( point, exc->zp1.n_points ) ||
+ BOUNDSL( cvtEntry, exc->cvtSize + 1 ) ||
+ BOUNDS( exc->GS.rp0, exc->zp0.n_points ) )
+ {
+ if ( exc->pedantic_hinting )
+ exc->error = FT_THROW( Invalid_Reference );
+ goto Fail;
+ }
+
+ if ( !cvtEntry )
+ cvt_dist = 0;
+ else
+ cvt_dist = exc->func_read_cvt( exc, cvtEntry - 1 );
+
+ /* single width test */
+
+ if ( FT_ABS( cvt_dist - exc->GS.single_width_value ) <
+ exc->GS.single_width_cutin )
+ {
+ if ( cvt_dist >= 0 )
+ cvt_dist = exc->GS.single_width_value;
+ else
+ cvt_dist = -exc->GS.single_width_value;
+ }
+
+ /* UNDOCUMENTED! The MS rasterizer does that with */
+ /* twilight points (confirmed by Greg Hitchcock) */
+ if ( exc->GS.gep1 == 0 )
+ {
+ exc->zp1.org[point].x = exc->zp0.org[exc->GS.rp0].x +
+ TT_MulFix14( cvt_dist,
+ exc->GS.freeVector.x );
+ exc->zp1.org[point].y = exc->zp0.org[exc->GS.rp0].y +
+ TT_MulFix14( cvt_dist,
+ exc->GS.freeVector.y );
+ exc->zp1.cur[point] = exc->zp1.org[point];
+ }
+
+ org_dist = DUALPROJ( &exc->zp1.org[point], &exc->zp0.org[exc->GS.rp0] );
+ cur_dist = PROJECT ( &exc->zp1.cur[point], &exc->zp0.cur[exc->GS.rp0] );
+
+ /* auto-flip test */
+
+ if ( exc->GS.auto_flip )
+ {
+ if ( ( org_dist ^ cvt_dist ) < 0 )
+ cvt_dist = -cvt_dist;
+ }
+
+#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
+ if ( SUBPIXEL_HINTING &&
+ exc->ignore_x_mode &&
+ exc->GS.freeVector.y != 0 &&
+ ( exc->sph_tweak_flags & SPH_TWEAK_TIMES_NEW_ROMAN_HACK ) )
+ {
+ if ( cur_dist < -64 )
+ cvt_dist -= 16;
+ else if ( cur_dist > 64 && cur_dist < 84 )
+ cvt_dist += 32;
+ }
+#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
+
+ /* control value cut-in and round */
+
+ if ( ( exc->opcode & 4 ) != 0 )
+ {
+ /* XXX: UNDOCUMENTED! Only perform cut-in test when both points */
+ /* refer to the same zone. */
+
+ if ( exc->GS.gep0 == exc->GS.gep1 )
+ {
+ /* XXX: According to Greg Hitchcock, the following wording is */
+ /* the right one: */
+ /* */
+ /* When the absolute difference between the value in */
+ /* the table [CVT] and the measurement directly from */
+ /* the outline is _greater_ than the cut_in value, the */
+ /* outline measurement is used. */
+ /* */
+ /* This is from `instgly.doc'. The description in */
+ /* `ttinst2.doc', version 1.66, is thus incorrect since */
+ /* it implies `>=' instead of `>'. */
+
+ if ( FT_ABS( cvt_dist - org_dist ) > control_value_cutin )
+ cvt_dist = org_dist;
+ }
+
+ distance = exc->func_round(
+ exc,
+ cvt_dist,
+ exc->tt_metrics.compensations[exc->opcode & 3] );
+ }
+ else
+ {
+
+#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
+ /* do cvt cut-in always in MIRP for sph */
+ if ( SUBPIXEL_HINTING &&
+ exc->ignore_x_mode &&
+ exc->GS.gep0 == exc->GS.gep1 )
+ {
+ if ( FT_ABS( cvt_dist - org_dist ) > control_value_cutin )
+ cvt_dist = org_dist;
+ }
+#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
+
+ distance = Round_None(
+ exc,
+ cvt_dist,
+ exc->tt_metrics.compensations[exc->opcode & 3] );
+ }
+
+ /* minimum distance test */
+
+ if ( ( exc->opcode & 8 ) != 0 )
+ {
+ if ( org_dist >= 0 )
+ {
+ if ( distance < minimum_distance )
+ distance = minimum_distance;
+ }
+ else
+ {
+ if ( distance > -minimum_distance )
+ distance = -minimum_distance;
+ }
+ }
+
+#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
+ if ( SUBPIXEL_HINTING )
+ {
+ B1 = exc->zp1.cur[point].y;
+
+ /* Round moves if necessary */
+ if ( exc->ignore_x_mode &&
+ exc->GS.freeVector.y != 0 &&
+ ( exc->sph_tweak_flags & SPH_TWEAK_ROUND_NONPIXEL_Y_MOVES ) )
+ distance = FT_PIX_ROUND( B1 + distance - cur_dist ) - B1 + cur_dist;
+
+ if ( exc->ignore_x_mode &&
+ exc->GS.freeVector.y != 0 &&
+ ( exc->opcode & 16 ) == 0 &&
+ ( exc->opcode & 8 ) == 0 &&
+ ( exc->sph_tweak_flags & SPH_TWEAK_COURIER_NEW_2_HACK ) )
+ distance += 64;
+ }
+#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
+
+ exc->func_move( exc, &exc->zp1, point, distance - cur_dist );
+
+#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
+ if ( SUBPIXEL_HINTING )
+ {
+ B2 = exc->zp1.cur[point].y;
+
+ /* Reverse move if necessary */
+ if ( exc->ignore_x_mode )
+ {
+ if ( exc->face->sph_compatibility_mode &&
+ exc->GS.freeVector.y != 0 &&
+ ( B1 & 63 ) == 0 &&
+ ( B2 & 63 ) != 0 )
+ reverse_move = TRUE;
+
+ if ( ( exc->sph_tweak_flags & SPH_TWEAK_SKIP_NONPIXEL_Y_MOVES ) &&
+ exc->GS.freeVector.y != 0 &&
+ ( B2 & 63 ) != 0 &&
+ ( B1 & 63 ) != 0 )
+ reverse_move = TRUE;
+ }
+
+ if ( reverse_move )
+ exc->func_move( exc, &exc->zp1, point, -( distance - cur_dist ) );
+ }
+
+#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
+
+ Fail:
+ exc->GS.rp1 = exc->GS.rp0;
+
+ if ( ( exc->opcode & 16 ) != 0 )
+ exc->GS.rp0 = point;
+
+ exc->GS.rp2 = point;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* ALIGNRP[]: ALIGN Relative Point */
+ /* Opcode range: 0x3C */
+ /* Stack: uint32 uint32... --> */
+ /* */
+ static void
+ Ins_ALIGNRP( TT_ExecContext exc )
+ {
+ FT_UShort point;
+ FT_F26Dot6 distance;
+
+
+#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
+ if ( SUBPIXEL_HINTING &&
+ exc->ignore_x_mode &&
+ exc->iup_called &&
+ ( exc->sph_tweak_flags & SPH_TWEAK_NO_ALIGNRP_AFTER_IUP ) )
+ {
+ exc->error = FT_THROW( Invalid_Reference );
+ goto Fail;
+ }
+#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
+
+ if ( exc->top < exc->GS.loop ||
+ BOUNDS( exc->GS.rp0, exc->zp0.n_points ) )
+ {
+ if ( exc->pedantic_hinting )
+ exc->error = FT_THROW( Invalid_Reference );
+ goto Fail;
+ }
+
+ while ( exc->GS.loop > 0 )
+ {
+ exc->args--;
+
+ point = (FT_UShort)exc->stack[exc->args];
+
+ if ( BOUNDS( point, exc->zp1.n_points ) )
+ {
+ if ( exc->pedantic_hinting )
+ {
+ exc->error = FT_THROW( Invalid_Reference );
+ return;
+ }
+ }
+ else
+ {
+ distance = PROJECT( exc->zp1.cur + point,
+ exc->zp0.cur + exc->GS.rp0 );
+
+ exc->func_move( exc, &exc->zp1, point, -distance );
+ }
+
+ exc->GS.loop--;
+ }
+
+ Fail:
+ exc->GS.loop = 1;
+ exc->new_top = exc->args;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* ISECT[]: moves point to InterSECTion */
+ /* Opcode range: 0x0F */
+ /* Stack: 5 * uint32 --> */
+ /* */
+ static void
+ Ins_ISECT( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ FT_UShort point,
+ a0, a1,
+ b0, b1;
+
+ FT_F26Dot6 discriminant, dotproduct;
+
+ FT_F26Dot6 dx, dy,
+ dax, day,
+ dbx, dby;
+
+ FT_F26Dot6 val;
+
+ FT_Vector R;
+
+
+ point = (FT_UShort)args[0];
+
+ a0 = (FT_UShort)args[1];
+ a1 = (FT_UShort)args[2];
+ b0 = (FT_UShort)args[3];
+ b1 = (FT_UShort)args[4];
+
+ if ( BOUNDS( b0, exc->zp0.n_points ) ||
+ BOUNDS( b1, exc->zp0.n_points ) ||
+ BOUNDS( a0, exc->zp1.n_points ) ||
+ BOUNDS( a1, exc->zp1.n_points ) ||
+ BOUNDS( point, exc->zp2.n_points ) )
+ {
+ if ( exc->pedantic_hinting )
+ exc->error = FT_THROW( Invalid_Reference );
+ return;
+ }
+
+ /* Cramer's rule */
+
+ dbx = exc->zp0.cur[b1].x - exc->zp0.cur[b0].x;
+ dby = exc->zp0.cur[b1].y - exc->zp0.cur[b0].y;
+
+ dax = exc->zp1.cur[a1].x - exc->zp1.cur[a0].x;
+ day = exc->zp1.cur[a1].y - exc->zp1.cur[a0].y;
+
+ dx = exc->zp0.cur[b0].x - exc->zp1.cur[a0].x;
+ dy = exc->zp0.cur[b0].y - exc->zp1.cur[a0].y;
+
+ exc->zp2.tags[point] |= FT_CURVE_TAG_TOUCH_BOTH;
+
+ discriminant = FT_MulDiv( dax, -dby, 0x40 ) +
+ FT_MulDiv( day, dbx, 0x40 );
+ dotproduct = FT_MulDiv( dax, dbx, 0x40 ) +
+ FT_MulDiv( day, dby, 0x40 );
+
+ /* The discriminant above is actually a cross product of vectors */
+ /* da and db. Together with the dot product, they can be used as */
+ /* surrogates for sine and cosine of the angle between the vectors. */
+ /* Indeed, */
+ /* dotproduct = |da||db|cos(angle) */
+ /* discriminant = |da||db|sin(angle) . */
+ /* We use these equations to reject grazing intersections by */
+ /* thresholding abs(tan(angle)) at 1/19, corresponding to 3 degrees. */
+ if ( 19 * FT_ABS( discriminant ) > FT_ABS( dotproduct ) )
+ {
+ val = FT_MulDiv( dx, -dby, 0x40 ) + FT_MulDiv( dy, dbx, 0x40 );
+
+ R.x = FT_MulDiv( val, dax, discriminant );
+ R.y = FT_MulDiv( val, day, discriminant );
+
+ exc->zp2.cur[point].x = exc->zp1.cur[a0].x + R.x;
+ exc->zp2.cur[point].y = exc->zp1.cur[a0].y + R.y;
+ }
+ else
+ {
+ /* else, take the middle of the middles of A and B */
+
+ exc->zp2.cur[point].x = ( exc->zp1.cur[a0].x +
+ exc->zp1.cur[a1].x +
+ exc->zp0.cur[b0].x +
+ exc->zp0.cur[b1].x ) / 4;
+ exc->zp2.cur[point].y = ( exc->zp1.cur[a0].y +
+ exc->zp1.cur[a1].y +
+ exc->zp0.cur[b0].y +
+ exc->zp0.cur[b1].y ) / 4;
+ }
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* ALIGNPTS[]: ALIGN PoinTS */
+ /* Opcode range: 0x27 */
+ /* Stack: uint32 uint32 --> */
+ /* */
+ static void
+ Ins_ALIGNPTS( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ FT_UShort p1, p2;
+ FT_F26Dot6 distance;
+
+
+ p1 = (FT_UShort)args[0];
+ p2 = (FT_UShort)args[1];
+
+ if ( BOUNDS( p1, exc->zp1.n_points ) ||
+ BOUNDS( p2, exc->zp0.n_points ) )
+ {
+ if ( exc->pedantic_hinting )
+ exc->error = FT_THROW( Invalid_Reference );
+ return;
+ }
+
+ distance = PROJECT( exc->zp0.cur + p2, exc->zp1.cur + p1 ) / 2;
+
+ exc->func_move( exc, &exc->zp1, p1, distance );
+ exc->func_move( exc, &exc->zp0, p2, -distance );
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* IP[]: Interpolate Point */
+ /* Opcode range: 0x39 */
+ /* Stack: uint32... --> */
+ /* */
+
+ /* SOMETIMES, DUMBER CODE IS BETTER CODE */
+
+ static void
+ Ins_IP( TT_ExecContext exc )
+ {
+ FT_F26Dot6 old_range, cur_range;
+ FT_Vector* orus_base;
+ FT_Vector* cur_base;
+ FT_Int twilight;
+
+
+ if ( exc->top < exc->GS.loop )
+ {
+ if ( exc->pedantic_hinting )
+ exc->error = FT_THROW( Invalid_Reference );
+ goto Fail;
+ }
+
+ /*
+ * We need to deal in a special way with the twilight zone.
+ * Otherwise, by definition, the value of exc->twilight.orus[n] is (0,0),
+ * for every n.
+ */
+ twilight = exc->GS.gep0 == 0 || exc->GS.gep1 == 0 || exc->GS.gep2 == 0;
+
+ if ( BOUNDS( exc->GS.rp1, exc->zp0.n_points ) )
+ {
+ if ( exc->pedantic_hinting )
+ exc->error = FT_THROW( Invalid_Reference );
+ goto Fail;
+ }
+
+ if ( twilight )
+ orus_base = &exc->zp0.org[exc->GS.rp1];
+ else
+ orus_base = &exc->zp0.orus[exc->GS.rp1];
+
+ cur_base = &exc->zp0.cur[exc->GS.rp1];
+
+ /* XXX: There are some glyphs in some braindead but popular */
+ /* fonts out there (e.g. [aeu]grave in monotype.ttf) */
+ /* calling IP[] with bad values of rp[12]. */
+ /* Do something sane when this odd thing happens. */
+ if ( BOUNDS( exc->GS.rp1, exc->zp0.n_points ) ||
+ BOUNDS( exc->GS.rp2, exc->zp1.n_points ) )
+ {
+ old_range = 0;
+ cur_range = 0;
+ }
+ else
+ {
+ if ( twilight )
+ old_range = DUALPROJ( &exc->zp1.org[exc->GS.rp2], orus_base );
+ else if ( exc->metrics.x_scale == exc->metrics.y_scale )
+ old_range = DUALPROJ( &exc->zp1.orus[exc->GS.rp2], orus_base );
+ else
+ {
+ FT_Vector vec;
+
+
+ vec.x = FT_MulFix( exc->zp1.orus[exc->GS.rp2].x - orus_base->x,
+ exc->metrics.x_scale );
+ vec.y = FT_MulFix( exc->zp1.orus[exc->GS.rp2].y - orus_base->y,
+ exc->metrics.y_scale );
+
+ old_range = FAST_DUALPROJ( &vec );
+ }
+
+ cur_range = PROJECT( &exc->zp1.cur[exc->GS.rp2], cur_base );
+ }
+
+ for ( ; exc->GS.loop > 0; --exc->GS.loop )
+ {
+ FT_UInt point = (FT_UInt)exc->stack[--exc->args];
+ FT_F26Dot6 org_dist, cur_dist, new_dist;
+
+
+ /* check point bounds */
+ if ( BOUNDS( point, exc->zp2.n_points ) )
+ {
+ if ( exc->pedantic_hinting )
+ {
+ exc->error = FT_THROW( Invalid_Reference );
+ return;
+ }
+ continue;
+ }
+
+ if ( twilight )
+ org_dist = DUALPROJ( &exc->zp2.org[point], orus_base );
+ else if ( exc->metrics.x_scale == exc->metrics.y_scale )
+ org_dist = DUALPROJ( &exc->zp2.orus[point], orus_base );
+ else
+ {
+ FT_Vector vec;
+
+
+ vec.x = FT_MulFix( exc->zp2.orus[point].x - orus_base->x,
+ exc->metrics.x_scale );
+ vec.y = FT_MulFix( exc->zp2.orus[point].y - orus_base->y,
+ exc->metrics.y_scale );
+
+ org_dist = FAST_DUALPROJ( &vec );
+ }
+
+ cur_dist = PROJECT( &exc->zp2.cur[point], cur_base );
+
+ if ( org_dist )
+ {
+ if ( old_range )
+ new_dist = FT_MulDiv( org_dist, cur_range, old_range );
+ else
+ {
+ /* This is the same as what MS does for the invalid case: */
+ /* */
+ /* delta = (Original_Pt - Original_RP1) - */
+ /* (Current_Pt - Current_RP1) ; */
+ /* */
+ /* In FreeType speak: */
+ /* */
+ /* delta = org_dist - cur_dist . */
+ /* */
+ /* We move `point' by `new_dist - cur_dist' after leaving */
+ /* this block, thus we have */
+ /* */
+ /* new_dist - cur_dist = delta , */
+ /* new_dist - cur_dist = org_dist - cur_dist , */
+ /* new_dist = org_dist . */
+
+ new_dist = org_dist;
+ }
+ }
+ else
+ new_dist = 0;
+
+ exc->func_move( exc,
+ &exc->zp2,
+ (FT_UShort)point,
+ new_dist - cur_dist );
+ }
+
+ Fail:
+ exc->GS.loop = 1;
+ exc->new_top = exc->args;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* UTP[a]: UnTouch Point */
+ /* Opcode range: 0x29 */
+ /* Stack: uint32 --> */
+ /* */
+ static void
+ Ins_UTP( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ FT_UShort point;
+ FT_Byte mask;
+
+
+ point = (FT_UShort)args[0];
+
+ if ( BOUNDS( point, exc->zp0.n_points ) )
+ {
+ if ( exc->pedantic_hinting )
+ exc->error = FT_THROW( Invalid_Reference );
+ return;
+ }
+
+ mask = 0xFF;
+
+ if ( exc->GS.freeVector.x != 0 )
+ mask &= ~FT_CURVE_TAG_TOUCH_X;
+
+ if ( exc->GS.freeVector.y != 0 )
+ mask &= ~FT_CURVE_TAG_TOUCH_Y;
+
+ exc->zp0.tags[point] &= mask;
+ }
+
+
+ /* Local variables for Ins_IUP: */
+ typedef struct IUP_WorkerRec_
+ {
+ FT_Vector* orgs; /* original and current coordinate */
+ FT_Vector* curs; /* arrays */
+ FT_Vector* orus;
+ FT_UInt max_points;
+
+ } IUP_WorkerRec, *IUP_Worker;
+
+
+ static void
+ _iup_worker_shift( IUP_Worker worker,
+ FT_UInt p1,
+ FT_UInt p2,
+ FT_UInt p )
+ {
+ FT_UInt i;
+ FT_F26Dot6 dx;
+
+
+ dx = worker->curs[p].x - worker->orgs[p].x;
+ if ( dx != 0 )
+ {
+ for ( i = p1; i < p; i++ )
+ worker->curs[i].x += dx;
+
+ for ( i = p + 1; i <= p2; i++ )
+ worker->curs[i].x += dx;
+ }
+ }
+
+
+ static void
+ _iup_worker_interpolate( IUP_Worker worker,
+ FT_UInt p1,
+ FT_UInt p2,
+ FT_UInt ref1,
+ FT_UInt ref2 )
+ {
+ FT_UInt i;
+ FT_F26Dot6 orus1, orus2, org1, org2, cur1, cur2, delta1, delta2;
+
+
+ if ( p1 > p2 )
+ return;
+
+ if ( BOUNDS( ref1, worker->max_points ) ||
+ BOUNDS( ref2, worker->max_points ) )
+ return;
+
+ orus1 = worker->orus[ref1].x;
+ orus2 = worker->orus[ref2].x;
+
+ if ( orus1 > orus2 )
+ {
+ FT_F26Dot6 tmp_o;
+ FT_UInt tmp_r;
+
+
+ tmp_o = orus1;
+ orus1 = orus2;
+ orus2 = tmp_o;
+
+ tmp_r = ref1;
+ ref1 = ref2;
+ ref2 = tmp_r;
+ }
+
+ org1 = worker->orgs[ref1].x;
+ org2 = worker->orgs[ref2].x;
+ cur1 = worker->curs[ref1].x;
+ cur2 = worker->curs[ref2].x;
+ delta1 = cur1 - org1;
+ delta2 = cur2 - org2;
+
+ if ( cur1 == cur2 || orus1 == orus2 )
+ {
+
+ /* trivial snap or shift of untouched points */
+ for ( i = p1; i <= p2; i++ )
+ {
+ FT_F26Dot6 x = worker->orgs[i].x;
+
+
+ if ( x <= org1 )
+ x += delta1;
+
+ else if ( x >= org2 )
+ x += delta2;
+
+ else
+ x = cur1;
+
+ worker->curs[i].x = x;
+ }
+ }
+ else
+ {
+ FT_Fixed scale = 0;
+ FT_Bool scale_valid = 0;
+
+
+ /* interpolation */
+ for ( i = p1; i <= p2; i++ )
+ {
+ FT_F26Dot6 x = worker->orgs[i].x;
+
+
+ if ( x <= org1 )
+ x += delta1;
+
+ else if ( x >= org2 )
+ x += delta2;
+
+ else
+ {
+ if ( !scale_valid )
+ {
+ scale_valid = 1;
+ scale = FT_DivFix( cur2 - cur1, orus2 - orus1 );
+ }
+
+ x = cur1 + FT_MulFix( worker->orus[i].x - orus1, scale );
+ }
+ worker->curs[i].x = x;
+ }
+ }
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* IUP[a]: Interpolate Untouched Points */
+ /* Opcode range: 0x30-0x31 */
+ /* Stack: --> */
+ /* */
+ static void
+ Ins_IUP( TT_ExecContext exc )
+ {
+ IUP_WorkerRec V;
+ FT_Byte mask;
+
+ FT_UInt first_point; /* first point of contour */
+ FT_UInt end_point; /* end point (last+1) of contour */
+
+ FT_UInt first_touched; /* first touched point in contour */
+ FT_UInt cur_touched; /* current touched point in contour */
+
+ FT_UInt point; /* current point */
+ FT_Short contour; /* current contour */
+
+
+ /* ignore empty outlines */
+ if ( exc->pts.n_contours == 0 )
+ return;
+
+ if ( exc->opcode & 1 )
+ {
+ mask = FT_CURVE_TAG_TOUCH_X;
+ V.orgs = exc->pts.org;
+ V.curs = exc->pts.cur;
+ V.orus = exc->pts.orus;
+ }
+ else
+ {
+ mask = FT_CURVE_TAG_TOUCH_Y;
+ V.orgs = (FT_Vector*)( (FT_Pos*)exc->pts.org + 1 );
+ V.curs = (FT_Vector*)( (FT_Pos*)exc->pts.cur + 1 );
+ V.orus = (FT_Vector*)( (FT_Pos*)exc->pts.orus + 1 );
+ }
+ V.max_points = exc->pts.n_points;
+
+ contour = 0;
+ point = 0;
+
+#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
+ if ( SUBPIXEL_HINTING &&
+ exc->ignore_x_mode )
+ {
+ exc->iup_called = TRUE;
+ if ( exc->sph_tweak_flags & SPH_TWEAK_SKIP_IUP )
+ return;
+ }
+#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
+
+ do
+ {
+ end_point = exc->pts.contours[contour] - exc->pts.first_point;
+ first_point = point;
+
+ if ( BOUNDS( end_point, exc->pts.n_points ) )
+ end_point = exc->pts.n_points - 1;
+
+ while ( point <= end_point && ( exc->pts.tags[point] & mask ) == 0 )
+ point++;
+
+ if ( point <= end_point )
+ {
+ first_touched = point;
+ cur_touched = point;
+
+ point++;
+
+ while ( point <= end_point )
+ {
+ if ( ( exc->pts.tags[point] & mask ) != 0 )
+ {
+ _iup_worker_interpolate( &V,
+ cur_touched + 1,
+ point - 1,
+ cur_touched,
+ point );
+ cur_touched = point;
+ }
+
+ point++;
+ }
+
+ if ( cur_touched == first_touched )
+ _iup_worker_shift( &V, first_point, end_point, cur_touched );
+ else
+ {
+ _iup_worker_interpolate( &V,
+ (FT_UShort)( cur_touched + 1 ),
+ end_point,
+ cur_touched,
+ first_touched );
+
+ if ( first_touched > 0 )
+ _iup_worker_interpolate( &V,
+ first_point,
+ first_touched - 1,
+ cur_touched,
+ first_touched );
+ }
+ }
+ contour++;
+ } while ( contour < exc->pts.n_contours );
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* DELTAPn[]: DELTA exceptions P1, P2, P3 */
+ /* Opcode range: 0x5D,0x71,0x72 */
+ /* Stack: uint32 (2 * uint32)... --> */
+ /* */
+ static void
+ Ins_DELTAP( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ FT_ULong nump, k;
+ FT_UShort A;
+ FT_ULong C, P;
+ FT_Long B;
+#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
+ FT_UShort B1, B2;
+
+
+ if ( SUBPIXEL_HINTING &&
+ exc->ignore_x_mode &&
+ exc->iup_called &&
+ ( exc->sph_tweak_flags & SPH_TWEAK_NO_DELTAP_AFTER_IUP ) )
+ goto Fail;
+#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
+
+
+#ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING
+ /* Delta hinting is covered by US Patent 5159668. */
+ if ( exc->face->unpatented_hinting )
+ {
+ FT_Long n = args[0] * 2;
+
+
+ if ( exc->args < n )
+ {
+ if ( exc->pedantic_hinting )
+ exc->error = FT_THROW( Too_Few_Arguments );
+ n = exc->args;
+ }
+
+ exc->args -= n;
+ exc->new_top = exc->args;
+ return;
+ }
+#endif
+
+ P = (FT_ULong)exc->func_cur_ppem( exc );
+ nump = (FT_ULong)args[0]; /* some points theoretically may occur more
+ than once, thus UShort isn't enough */
+
+ for ( k = 1; k <= nump; k++ )
+ {
+ if ( exc->args < 2 )
+ {
+ if ( exc->pedantic_hinting )
+ exc->error = FT_THROW( Too_Few_Arguments );
+ exc->args = 0;
+ goto Fail;
+ }
+
+ exc->args -= 2;
+
+ A = (FT_UShort)exc->stack[exc->args + 1];
+ B = exc->stack[exc->args];
+
+ /* XXX: Because some popular fonts contain some invalid DeltaP */
+ /* instructions, we simply ignore them when the stacked */
+ /* point reference is off limit, rather than returning an */
+ /* error. As a delta instruction doesn't change a glyph */
+ /* in great ways, this shouldn't be a problem. */
+
+ if ( !BOUNDS( A, exc->zp0.n_points ) )
+ {
+ C = ( (FT_ULong)B & 0xF0 ) >> 4;
+
+ switch ( exc->opcode )
+ {
+ case 0x5D:
+ break;
+
+ case 0x71:
+ C += 16;
+ break;
+
+ case 0x72:
+ C += 32;
+ break;
+ }
+
+ C += exc->GS.delta_base;
+
+ if ( P == C )
+ {
+ B = ( (FT_ULong)B & 0xF ) - 8;
+ if ( B >= 0 )
+ B++;
+ B *= 1L << ( 6 - exc->GS.delta_shift );
+
+#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
+
+ if ( SUBPIXEL_HINTING )
+ {
+ /*
+ * Allow delta move if
+ *
+ * - not using ignore_x_mode rendering,
+ * - glyph is specifically set to allow it, or
+ * - glyph is composite and freedom vector is not in subpixel
+ * direction.
+ */
+ if ( !exc->ignore_x_mode ||
+ ( exc->sph_tweak_flags & SPH_TWEAK_ALWAYS_DO_DELTAP ) ||
+ ( exc->is_composite && exc->GS.freeVector.y != 0 ) )
+ exc->func_move( exc, &exc->zp0, A, B );
+
+ /* Otherwise, apply subpixel hinting and compatibility mode */
+ /* rules, always skipping deltas in subpixel direction. */
+ else if ( exc->ignore_x_mode && exc->GS.freeVector.y != 0 )
+ {
+ /* save the y value of the point now; compare after move */
+ B1 = (FT_UShort)exc->zp0.cur[A].y;
+
+ /* Standard subpixel hinting: Allow y move for y-touched */
+ /* points. This messes up DejaVu ... */
+ if ( !exc->face->sph_compatibility_mode &&
+ ( exc->zp0.tags[A] & FT_CURVE_TAG_TOUCH_Y ) )
+ exc->func_move( exc, &exc->zp0, A, B );
+
+ /* compatibility mode */
+ else if ( exc->face->sph_compatibility_mode &&
+ !( exc->sph_tweak_flags & SPH_TWEAK_ALWAYS_SKIP_DELTAP ) )
+ {
+ if ( exc->sph_tweak_flags & SPH_TWEAK_ROUND_NONPIXEL_Y_MOVES )
+ B = FT_PIX_ROUND( B1 + B ) - B1;
+
+ /* Allow delta move if using sph_compatibility_mode, */
+ /* IUP has not been called, and point is touched on Y. */
+ if ( !exc->iup_called &&
+ ( exc->zp0.tags[A] & FT_CURVE_TAG_TOUCH_Y ) )
+ exc->func_move( exc, &exc->zp0, A, B );
+ }
+
+ B2 = (FT_UShort)exc->zp0.cur[A].y;
+
+ /* Reverse this move if it results in a disallowed move */
+ if ( exc->GS.freeVector.y != 0 &&
+ ( ( exc->face->sph_compatibility_mode &&
+ ( B1 & 63 ) == 0 &&
+ ( B2 & 63 ) != 0 ) ||
+ ( ( exc->sph_tweak_flags &
+ SPH_TWEAK_SKIP_NONPIXEL_Y_MOVES_DELTAP ) &&
+ ( B1 & 63 ) != 0 &&
+ ( B2 & 63 ) != 0 ) ) )
+ exc->func_move( exc, &exc->zp0, A, -B );
+ }
+ }
+ else
+#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
+
+ exc->func_move( exc, &exc->zp0, A, B );
+ }
+ }
+ else
+ if ( exc->pedantic_hinting )
+ exc->error = FT_THROW( Invalid_Reference );
+ }
+
+ Fail:
+ exc->new_top = exc->args;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* DELTACn[]: DELTA exceptions C1, C2, C3 */
+ /* Opcode range: 0x73,0x74,0x75 */
+ /* Stack: uint32 (2 * uint32)... --> */
+ /* */
+ static void
+ Ins_DELTAC( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ FT_ULong nump, k;
+ FT_ULong A, C, P;
+ FT_Long B;
+
+
+#ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING
+ /* Delta hinting is covered by US Patent 5159668. */
+ if ( exc->face->unpatented_hinting )
+ {
+ FT_Long n = args[0] * 2;
+
+
+ if ( exc->args < n )
+ {
+ if ( exc->pedantic_hinting )
+ exc->error = FT_THROW( Too_Few_Arguments );
+ n = exc->args;
+ }
+
+ exc->args -= n;
+ exc->new_top = exc->args;
+ return;
+ }
+#endif
+
+ P = (FT_ULong)exc->func_cur_ppem( exc );
+ nump = (FT_ULong)args[0];
+
+ for ( k = 1; k <= nump; k++ )
+ {
+ if ( exc->args < 2 )
+ {
+ if ( exc->pedantic_hinting )
+ exc->error = FT_THROW( Too_Few_Arguments );
+ exc->args = 0;
+ goto Fail;
+ }
+
+ exc->args -= 2;
+
+ A = (FT_ULong)exc->stack[exc->args + 1];
+ B = exc->stack[exc->args];
+
+ if ( BOUNDSL( A, exc->cvtSize ) )
+ {
+ if ( exc->pedantic_hinting )
+ {
+ exc->error = FT_THROW( Invalid_Reference );
+ return;
+ }
+ }
+ else
+ {
+ C = ( (FT_ULong)B & 0xF0 ) >> 4;
+
+ switch ( exc->opcode )
+ {
+ case 0x73:
+ break;
+
+ case 0x74:
+ C += 16;
+ break;
+
+ case 0x75:
+ C += 32;
+ break;
+ }
+
+ C += exc->GS.delta_base;
+
+ if ( P == C )
+ {
+ B = ( (FT_ULong)B & 0xF ) - 8;
+ if ( B >= 0 )
+ B++;
+ B *= 1L << ( 6 - exc->GS.delta_shift );
+
+ exc->func_move_cvt( exc, A, B );
+ }
+ }
+ }
+
+ Fail:
+ exc->new_top = exc->args;
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* MISC. INSTRUCTIONS */
+ /* */
+ /*************************************************************************/
+
+
+ /*************************************************************************/
+ /* */
+ /* GETINFO[]: GET INFOrmation */
+ /* Opcode range: 0x88 */
+ /* Stack: uint32 --> uint32 */
+ /* */
+ /* XXX: UNDOCUMENTED: Selector bits higher than 9 are currently (May */
+ /* 2015) not documented in the OpenType specification. */
+ /* */
+ /* Selector bit 11 is incorrectly described as bit 8, while the */
+ /* real meaning of bit 8 (vertical LCD subpixels) stays */
+ /* undocumented. The same mistake can be found in Greg Hitchcock's */
+ /* whitepaper. */
+ /* */
+ static void
+ Ins_GETINFO( TT_ExecContext exc,
+ FT_Long* args )
+ {
+ FT_Long K;
+
+
+ K = 0;
+
+#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
+ /********************************/
+ /* RASTERIZER VERSION */
+ /* Selector Bit: 0 */
+ /* Return Bit(s): 0-7 */
+ /* */
+ if ( SUBPIXEL_HINTING &&
+ ( args[0] & 1 ) != 0 &&
+ exc->subpixel_hinting )
+ {
+ if ( exc->ignore_x_mode )
+ {
+ /* if in ClearType backwards compatibility mode, */
+ /* we sometimes change the TrueType version dynamically */
+ K = exc->rasterizer_version;
+ FT_TRACE6(( "Setting rasterizer version %d\n",
+ exc->rasterizer_version ));
+ }
+ else
+ K = TT_INTERPRETER_VERSION_38;
+ }
+ else
+#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
+ if ( ( args[0] & 1 ) != 0 )
+ K = TT_INTERPRETER_VERSION_35;
+
+ /********************************/
+ /* GLYPH ROTATED */
+ /* Selector Bit: 1 */
+ /* Return Bit(s): 8 */
+ /* */
+ if ( ( args[0] & 2 ) != 0 && exc->tt_metrics.rotated )
+ K |= 0x80;
+
+ /********************************/
+ /* GLYPH STRETCHED */
+ /* Selector Bit: 2 */
+ /* Return Bit(s): 9 */
+ /* */
+ if ( ( args[0] & 4 ) != 0 && exc->tt_metrics.stretched )
+ K |= 1 << 8;
+
+ /********************************/
+ /* HINTING FOR GRAYSCALE */
+ /* Selector Bit: 5 */
+ /* Return Bit(s): 12 */
+ /* */
+ if ( ( args[0] & 32 ) != 0 && exc->grayscale )
+ K |= 1 << 12;
+
+#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
+
+ if ( SUBPIXEL_HINTING &&
+ exc->rasterizer_version >= TT_INTERPRETER_VERSION_35 )
+ {
+
+ if ( exc->rasterizer_version >= 37 )
+ {
+ /********************************/
+ /* HINTING FOR SUBPIXEL */
+ /* Selector Bit: 6 */
+ /* Return Bit(s): 13 */
+ /* */
+ if ( ( args[0] & 64 ) != 0 && exc->subpixel_hinting )
+ K |= 1 << 13;
+
+ /********************************/
+ /* COMPATIBLE WIDTHS ENABLED */
+ /* Selector Bit: 7 */
+ /* Return Bit(s): 14 */
+ /* */
+ /* Functionality still needs to be added */
+ if ( ( args[0] & 128 ) != 0 && exc->compatible_widths )
+ K |= 1 << 14;
+
+ /********************************/
+ /* VERTICAL LCD SUBPIXELS? */
+ /* Selector Bit: 8 */
+ /* Return Bit(s): 15 */
+ /* */
+ /* Functionality still needs to be added */
+ if ( ( args[0] & 256 ) != 0 && exc->vertical_lcd )
+ K |= 1 << 15;
+
+ /********************************/
+ /* HINTING FOR BGR? */
+ /* Selector Bit: 9 */
+ /* Return Bit(s): 16 */
+ /* */
+ /* Functionality still needs to be added */
+ if ( ( args[0] & 512 ) != 0 && exc->bgr )
+ K |= 1 << 16;
+
+ if ( exc->rasterizer_version >= 38 )
+ {
+ /********************************/
+ /* SUBPIXEL POSITIONED? */
+ /* Selector Bit: 10 */
+ /* Return Bit(s): 17 */
+ /* */
+ /* Functionality still needs to be added */
+ if ( ( args[0] & 1024 ) != 0 && exc->subpixel_positioned )
+ K |= 1 << 17;
+
+ /********************************/
+ /* SYMMETRICAL SMOOTHING */
+ /* Selector Bit: 11 */
+ /* Return Bit(s): 18 */
+ /* */
+ /* Functionality still needs to be added */
+ if ( ( args[0] & 2048 ) != 0 && exc->symmetrical_smoothing )
+ K |= 1 << 18;
+
+ /********************************/
+ /* GRAY CLEARTYPE */
+ /* Selector Bit: 12 */
+ /* Return Bit(s): 19 */
+ /* */
+ /* Functionality still needs to be added */
+ if ( ( args[0] & 4096 ) != 0 && exc->gray_cleartype )
+ K |= 1 << 19;
+ }
+ }
+ }
+
+#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
+
+ args[0] = K;
+ }
+
+
+ static void
+ Ins_UNKNOWN( TT_ExecContext exc )
+ {
+ TT_DefRecord* def = exc->IDefs;
+ TT_DefRecord* limit = def + exc->numIDefs;
+
+
+ for ( ; def < limit; def++ )
+ {
+ if ( (FT_Byte)def->opc == exc->opcode && def->active )
+ {
+ TT_CallRec* call;
+
+
+ if ( exc->callTop >= exc->callSize )
+ {
+ exc->error = FT_THROW( Stack_Overflow );
+ return;
+ }
+
+ call = exc->callStack + exc->callTop++;
+
+ call->Caller_Range = exc->curRange;
+ call->Caller_IP = exc->IP + 1;
+ call->Cur_Count = 1;
+ call->Def = def;
+
+ Ins_Goto_CodeRange( exc, def->range, def->start );
+
+ exc->step_ins = FALSE;
+ return;
+ }
+ }
+
+ exc->error = FT_THROW( Invalid_Opcode );
+ }
+
+
+ /*************************************************************************/
+ /* */
+ /* RUN */
+ /* */
+ /* This function executes a run of opcodes. It will exit in the */
+ /* following cases: */
+ /* */
+ /* - Errors (in which case it returns FALSE). */
+ /* */
+ /* - Reaching the end of the main code range (returns TRUE). */
+ /* Reaching the end of a code range within a function call is an */
+ /* error. */
+ /* */
+ /* - After executing one single opcode, if the flag `Instruction_Trap' */
+ /* is set to TRUE (returns TRUE). */
+ /* */
+ /* On exit with TRUE, test IP < CodeSize to know whether it comes from */
+ /* an instruction trap or a normal termination. */
+ /* */
+ /* */
+ /* Note: The documented DEBUG opcode pops a value from the stack. This */
+ /* behaviour is unsupported; here a DEBUG opcode is always an */
+ /* error. */
+ /* */
+ /* */
+ /* THIS IS THE INTERPRETER'S MAIN LOOP. */
+ /* */
+ /*************************************************************************/
+
+
+ /* documentation is in ttinterp.h */
+
+ FT_EXPORT_DEF( FT_Error )
+ TT_RunIns( TT_ExecContext exc )
+ {
+ FT_Long ins_counter = 0; /* executed instructions counter */
+ FT_UShort i;
+
+#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
+ FT_Byte opcode_pattern[1][2] = {
+ /* #8 TypeMan Talk Align */
+ {
+ 0x06, /* SPVTL */
+ 0x7D, /* RDTG */
+ },
+ };
+ FT_UShort opcode_patterns = 1;
+ FT_UShort opcode_pointer[1] = { 0 };
+ FT_UShort opcode_size[1] = { 1 };
+#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
+
+
+#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
+ exc->iup_called = FALSE;
+#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
+
+ /* set PPEM and CVT functions */
+ exc->tt_metrics.ratio = 0;
+ if ( exc->metrics.x_ppem != exc->metrics.y_ppem )
+ {
+ /* non-square pixels, use the stretched routines */
+ exc->func_cur_ppem = Current_Ppem_Stretched;
+ exc->func_read_cvt = Read_CVT_Stretched;
+ exc->func_write_cvt = Write_CVT_Stretched;
+ exc->func_move_cvt = Move_CVT_Stretched;
+ }
+ else
+ {
+ /* square pixels, use normal routines */
+ exc->func_cur_ppem = Current_Ppem;
+ exc->func_read_cvt = Read_CVT;
+ exc->func_write_cvt = Write_CVT;
+ exc->func_move_cvt = Move_CVT;
+ }
+
+ Compute_Funcs( exc );
+ Compute_Round( exc, (FT_Byte)exc->GS.round_state );
+
+ do
+ {
+ exc->opcode = exc->code[exc->IP];
+
+#ifdef FT_DEBUG_LEVEL_TRACE
+ {
+ FT_Long cnt = FT_MIN( 8, exc->top );
+ FT_Long n;
+
+
+ /* if tracing level is 7, show current code position */
+ /* and the first few stack elements also */
+ FT_TRACE6(( " " ));
+ FT_TRACE7(( "%06d ", exc->IP ));
+ FT_TRACE6(( opcode_name[exc->opcode] + 2 ));
+ FT_TRACE7(( "%*s", *opcode_name[exc->opcode] == 'A'
+ ? 2
+ : 12 - ( *opcode_name[exc->opcode] - '0' ),
+ "#" ));
+ for ( n = 0; n < cnt; n++ )
+ FT_TRACE7(( " %d", exc->stack[exc->top - n] ));
+ FT_TRACE6(( "\n" ));
+ }
+#endif /* FT_DEBUG_LEVEL_TRACE */
+
+ if ( ( exc->length = opcode_length[exc->opcode] ) < 0 )
+ {
+ if ( exc->IP + 1 >= exc->codeSize )
+ goto LErrorCodeOverflow_;
+
+ exc->length = 2 - exc->length * exc->code[exc->IP + 1];
+ }
+
+ if ( exc->IP + exc->length > exc->codeSize )
+ goto LErrorCodeOverflow_;
+
+ /* First, let's check for empty stack and overflow */
+ exc->args = exc->top - ( Pop_Push_Count[exc->opcode] >> 4 );
+
+ /* `args' is the top of the stack once arguments have been popped. */
+ /* One can also interpret it as the index of the last argument. */
+ if ( exc->args < 0 )
+ {
+ if ( exc->pedantic_hinting )
+ {
+ exc->error = FT_THROW( Too_Few_Arguments );
+ goto LErrorLabel_;
+ }
+
+ /* push zeroes onto the stack */
+ for ( i = 0; i < Pop_Push_Count[exc->opcode] >> 4; i++ )
+ exc->stack[i] = 0;
+ exc->args = 0;
+ }
+
+ exc->new_top = exc->args + ( Pop_Push_Count[exc->opcode] & 15 );
+
+ /* `new_top' is the new top of the stack, after the instruction's */
+ /* execution. `top' will be set to `new_top' after the `switch' */
+ /* statement. */
+ if ( exc->new_top > exc->stackSize )
+ {
+ exc->error = FT_THROW( Stack_Overflow );
+ goto LErrorLabel_;
+ }
+
+ exc->step_ins = TRUE;
+ exc->error = FT_Err_Ok;
+
+#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
+
+ if ( SUBPIXEL_HINTING )
+ {
+ for ( i = 0; i < opcode_patterns; i++ )
+ {
+ if ( opcode_pointer[i] < opcode_size[i] &&
+ exc->opcode == opcode_pattern[i][opcode_pointer[i]] )
+ {
+ opcode_pointer[i] += 1;
+
+ if ( opcode_pointer[i] == opcode_size[i] )
+ {
+ FT_TRACE6(( "sph: opcode ptrn: %d, %s %s\n",
+ i,
+ exc->face->root.family_name,
+ exc->face->root.style_name ));
+
+ switch ( i )
+ {
+ case 0:
+ break;
+ }
+ opcode_pointer[i] = 0;
+ }
+ }
+ else
+ opcode_pointer[i] = 0;
+ }
+ }
+
+#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
+
+ {
+ FT_Long* args = exc->stack + exc->args;
+ FT_Byte opcode = exc->opcode;
+
+
+ switch ( opcode )
+ {
+ case 0x00: /* SVTCA y */
+ case 0x01: /* SVTCA x */
+ case 0x02: /* SPvTCA y */
+ case 0x03: /* SPvTCA x */
+ case 0x04: /* SFvTCA y */
+ case 0x05: /* SFvTCA x */
+ Ins_SxyTCA( exc );
+ break;
+
+ case 0x06: /* SPvTL // */
+ case 0x07: /* SPvTL + */
+ Ins_SPVTL( exc, args );
+ break;
+
+ case 0x08: /* SFvTL // */
+ case 0x09: /* SFvTL + */
+ Ins_SFVTL( exc, args );
+ break;
+
+ case 0x0A: /* SPvFS */
+ Ins_SPVFS( exc, args );
+ break;
+
+ case 0x0B: /* SFvFS */
+ Ins_SFVFS( exc, args );
+ break;
+
+ case 0x0C: /* GPv */
+ Ins_GPV( exc, args );
+ break;
+
+ case 0x0D: /* GFv */
+ Ins_GFV( exc, args );
+ break;
+
+ case 0x0E: /* SFvTPv */
+ Ins_SFVTPV( exc );
+ break;
+
+ case 0x0F: /* ISECT */
+ Ins_ISECT( exc, args );
+ break;
+
+ case 0x10: /* SRP0 */
+ Ins_SRP0( exc, args );
+ break;
+
+ case 0x11: /* SRP1 */
+ Ins_SRP1( exc, args );
+ break;
+
+ case 0x12: /* SRP2 */
+ Ins_SRP2( exc, args );
+ break;
+
+ case 0x13: /* SZP0 */
+ Ins_SZP0( exc, args );
+ break;
+
+ case 0x14: /* SZP1 */
+ Ins_SZP1( exc, args );
+ break;
+
+ case 0x15: /* SZP2 */
+ Ins_SZP2( exc, args );
+ break;
+
+ case 0x16: /* SZPS */
+ Ins_SZPS( exc, args );
+ break;
+
+ case 0x17: /* SLOOP */
+ Ins_SLOOP( exc, args );
+ break;
+
+ case 0x18: /* RTG */
+ Ins_RTG( exc );
+ break;
+
+ case 0x19: /* RTHG */
+ Ins_RTHG( exc );
+ break;
+
+ case 0x1A: /* SMD */
+ Ins_SMD( exc, args );
+ break;
+
+ case 0x1B: /* ELSE */
+ Ins_ELSE( exc );
+ break;
+
+ case 0x1C: /* JMPR */
+ Ins_JMPR( exc, args );
+ break;
+
+ case 0x1D: /* SCVTCI */
+ Ins_SCVTCI( exc, args );
+ break;
+
+ case 0x1E: /* SSWCI */
+ Ins_SSWCI( exc, args );
+ break;
+
+ case 0x1F: /* SSW */
+ Ins_SSW( exc, args );
+ break;
+
+ case 0x20: /* DUP */
+ Ins_DUP( args );
+ break;
+
+ case 0x21: /* POP */
+ Ins_POP();
+ break;
+
+ case 0x22: /* CLEAR */
+ Ins_CLEAR( exc );
+ break;
+
+ case 0x23: /* SWAP */
+ Ins_SWAP( args );
+ break;
+
+ case 0x24: /* DEPTH */
+ Ins_DEPTH( exc, args );
+ break;
+
+ case 0x25: /* CINDEX */
+ Ins_CINDEX( exc, args );
+ break;
+
+ case 0x26: /* MINDEX */
+ Ins_MINDEX( exc, args );
+ break;
+
+ case 0x27: /* ALIGNPTS */
+ Ins_ALIGNPTS( exc, args );
+ break;
+
+ case 0x28: /* ???? */
+ Ins_UNKNOWN( exc );
+ break;
+
+ case 0x29: /* UTP */
+ Ins_UTP( exc, args );
+ break;
+
+ case 0x2A: /* LOOPCALL */
+ Ins_LOOPCALL( exc, args );
+ break;
+
+ case 0x2B: /* CALL */
+ Ins_CALL( exc, args );
+ break;
+
+ case 0x2C: /* FDEF */
+ Ins_FDEF( exc, args );
+ break;
+
+ case 0x2D: /* ENDF */
+ Ins_ENDF( exc );
+ break;
+
+ case 0x2E: /* MDAP */
+ case 0x2F: /* MDAP */
+ Ins_MDAP( exc, args );
+ break;
+
+ case 0x30: /* IUP */
+ case 0x31: /* IUP */
+ Ins_IUP( exc );
+ break;
+
+ case 0x32: /* SHP */
+ case 0x33: /* SHP */
+ Ins_SHP( exc );
+ break;
+
+ case 0x34: /* SHC */
+ case 0x35: /* SHC */
+ Ins_SHC( exc, args );
+ break;
+
+ case 0x36: /* SHZ */
+ case 0x37: /* SHZ */
+ Ins_SHZ( exc, args );
+ break;
+
+ case 0x38: /* SHPIX */
+ Ins_SHPIX( exc, args );
+ break;
+
+ case 0x39: /* IP */
+ Ins_IP( exc );
+ break;
+
+ case 0x3A: /* MSIRP */
+ case 0x3B: /* MSIRP */
+ Ins_MSIRP( exc, args );
+ break;
+
+ case 0x3C: /* AlignRP */
+ Ins_ALIGNRP( exc );
+ break;
+
+ case 0x3D: /* RTDG */
+ Ins_RTDG( exc );
+ break;
+
+ case 0x3E: /* MIAP */
+ case 0x3F: /* MIAP */
+ Ins_MIAP( exc, args );
+ break;
+
+ case 0x40: /* NPUSHB */
+ Ins_NPUSHB( exc, args );
+ break;
+
+ case 0x41: /* NPUSHW */
+ Ins_NPUSHW( exc, args );
+ break;
+
+ case 0x42: /* WS */
+ Ins_WS( exc, args );
+ break;
+
+ case 0x43: /* RS */
+ Ins_RS( exc, args );
+ break;
+
+ case 0x44: /* WCVTP */
+ Ins_WCVTP( exc, args );
+ break;
+
+ case 0x45: /* RCVT */
+ Ins_RCVT( exc, args );
+ break;
+
+ case 0x46: /* GC */
+ case 0x47: /* GC */
+ Ins_GC( exc, args );
+ break;
+
+ case 0x48: /* SCFS */
+ Ins_SCFS( exc, args );
+ break;
+
+ case 0x49: /* MD */
+ case 0x4A: /* MD */
+ Ins_MD( exc, args );
+ break;
+
+ case 0x4B: /* MPPEM */
+ Ins_MPPEM( exc, args );
+ break;
+
+ case 0x4C: /* MPS */
+ Ins_MPS( exc, args );
+ break;
+
+ case 0x4D: /* FLIPON */
+ Ins_FLIPON( exc );
+ break;
+
+ case 0x4E: /* FLIPOFF */
+ Ins_FLIPOFF( exc );
+ break;
+
+ case 0x4F: /* DEBUG */
+ Ins_DEBUG( exc );
+ break;
+
+ case 0x50: /* LT */
+ Ins_LT( args );
+ break;
+
+ case 0x51: /* LTEQ */
+ Ins_LTEQ( args );
+ break;
+
+ case 0x52: /* GT */
+ Ins_GT( args );
+ break;
+
+ case 0x53: /* GTEQ */
+ Ins_GTEQ( args );
+ break;
+
+ case 0x54: /* EQ */
+ Ins_EQ( args );
+ break;
+
+ case 0x55: /* NEQ */
+ Ins_NEQ( args );
+ break;
+
+ case 0x56: /* ODD */
+ Ins_ODD( exc, args );
+ break;
+
+ case 0x57: /* EVEN */
+ Ins_EVEN( exc, args );
+ break;
+
+ case 0x58: /* IF */
+ Ins_IF( exc, args );
+ break;
+
+ case 0x59: /* EIF */
+ Ins_EIF();
+ break;
+
+ case 0x5A: /* AND */
+ Ins_AND( args );
+ break;
+
+ case 0x5B: /* OR */
+ Ins_OR( args );
+ break;
+
+ case 0x5C: /* NOT */
+ Ins_NOT( args );
+ break;
+
+ case 0x5D: /* DELTAP1 */
+ Ins_DELTAP( exc, args );
+ break;
+
+ case 0x5E: /* SDB */
+ Ins_SDB( exc, args );
+ break;
+
+ case 0x5F: /* SDS */
+ Ins_SDS( exc, args );
+ break;
+
+ case 0x60: /* ADD */
+ Ins_ADD( args );
+ break;
+
+ case 0x61: /* SUB */
+ Ins_SUB( args );
+ break;
+
+ case 0x62: /* DIV */
+ Ins_DIV( exc, args );
+ break;
+
+ case 0x63: /* MUL */
+ Ins_MUL( args );
+ break;
+
+ case 0x64: /* ABS */
+ Ins_ABS( args );
+ break;
+
+ case 0x65: /* NEG */
+ Ins_NEG( args );
+ break;
+
+ case 0x66: /* FLOOR */
+ Ins_FLOOR( args );
+ break;
+
+ case 0x67: /* CEILING */
+ Ins_CEILING( args );
+ break;
+
+ case 0x68: /* ROUND */
+ case 0x69: /* ROUND */
+ case 0x6A: /* ROUND */
+ case 0x6B: /* ROUND */
+ Ins_ROUND( exc, args );
+ break;
+
+ case 0x6C: /* NROUND */
+ case 0x6D: /* NROUND */
+ case 0x6E: /* NRRUND */
+ case 0x6F: /* NROUND */
+ Ins_NROUND( exc, args );
+ break;
+
+ case 0x70: /* WCVTF */
+ Ins_WCVTF( exc, args );
+ break;
+
+ case 0x71: /* DELTAP2 */
+ case 0x72: /* DELTAP3 */
+ Ins_DELTAP( exc, args );
+ break;
+
+ case 0x73: /* DELTAC0 */
+ case 0x74: /* DELTAC1 */
+ case 0x75: /* DELTAC2 */
+ Ins_DELTAC( exc, args );
+ break;
+
+ case 0x76: /* SROUND */
+ Ins_SROUND( exc, args );
+ break;
+
+ case 0x77: /* S45Round */
+ Ins_S45ROUND( exc, args );
+ break;
+
+ case 0x78: /* JROT */
+ Ins_JROT( exc, args );
+ break;
+
+ case 0x79: /* JROF */
+ Ins_JROF( exc, args );
+ break;
+
+ case 0x7A: /* ROFF */
+ Ins_ROFF( exc );
+ break;
+
+ case 0x7B: /* ???? */
+ Ins_UNKNOWN( exc );
+ break;
+
+ case 0x7C: /* RUTG */
+ Ins_RUTG( exc );
+ break;
+
+ case 0x7D: /* RDTG */
+ Ins_RDTG( exc );
+ break;
+
+ case 0x7E: /* SANGW */
+ Ins_SANGW();
+ break;
+
+ case 0x7F: /* AA */
+ Ins_AA();
+ break;
+
+ case 0x80: /* FLIPPT */
+ Ins_FLIPPT( exc );
+ break;
+
+ case 0x81: /* FLIPRGON */
+ Ins_FLIPRGON( exc, args );
+ break;
+
+ case 0x82: /* FLIPRGOFF */
+ Ins_FLIPRGOFF( exc, args );
+ break;
+
+ case 0x83: /* UNKNOWN */
+ case 0x84: /* UNKNOWN */
+ Ins_UNKNOWN( exc );
+ break;
+
+ case 0x85: /* SCANCTRL */
+ Ins_SCANCTRL( exc, args );
+ break;
+
+ case 0x86: /* SDPvTL */
+ case 0x87: /* SDPvTL */
+ Ins_SDPVTL( exc, args );
+ break;
+
+ case 0x88: /* GETINFO */
+ Ins_GETINFO( exc, args );
+ break;
+
+ case 0x89: /* IDEF */
+ Ins_IDEF( exc, args );
+ break;
+
+ case 0x8A: /* ROLL */
+ Ins_ROLL( args );
+ break;
+
+ case 0x8B: /* MAX */
+ Ins_MAX( args );
+ break;
+
+ case 0x8C: /* MIN */
+ Ins_MIN( args );
+ break;
+
+ case 0x8D: /* SCANTYPE */
+ Ins_SCANTYPE( exc, args );
+ break;
+
+ case 0x8E: /* INSTCTRL */
+ Ins_INSTCTRL( exc, args );
+ break;
+
+ case 0x8F:
+ Ins_UNKNOWN( exc );
+ break;
+
+ default:
+ if ( opcode >= 0xE0 )
+ Ins_MIRP( exc, args );
+ else if ( opcode >= 0xC0 )
+ Ins_MDRP( exc, args );
+ else if ( opcode >= 0xB8 )
+ Ins_PUSHW( exc, args );
+ else if ( opcode >= 0xB0 )
+ Ins_PUSHB( exc, args );
+ else
+ Ins_UNKNOWN( exc );
+ }
+ }
+
+ if ( exc->error )
+ {
+ switch ( exc->error )
+ {
+ /* looking for redefined instructions */
+ case FT_ERR( Invalid_Opcode ):
+ {
+ TT_DefRecord* def = exc->IDefs;
+ TT_DefRecord* limit = def + exc->numIDefs;
+
+
+ for ( ; def < limit; def++ )
+ {
+ if ( def->active && exc->opcode == (FT_Byte)def->opc )
+ {
+ TT_CallRec* callrec;
+
+
+ if ( exc->callTop >= exc->callSize )
+ {
+ exc->error = FT_THROW( Invalid_Reference );
+ goto LErrorLabel_;
+ }
+
+ callrec = &exc->callStack[exc->callTop];
+
+ callrec->Caller_Range = exc->curRange;
+ callrec->Caller_IP = exc->IP + 1;
+ callrec->Cur_Count = 1;
+ callrec->Def = def;
+
+ if ( Ins_Goto_CodeRange( exc,
+ def->range,
+ def->start ) == FAILURE )
+ goto LErrorLabel_;
+
+ goto LSuiteLabel_;
+ }
+ }
+ }
+
+ exc->error = FT_THROW( Invalid_Opcode );
+ goto LErrorLabel_;
+
+#if 0
+ break; /* Unreachable code warning suppression. */
+ /* Leave to remind in case a later change the editor */
+ /* to consider break; */
+#endif
+
+ default:
+ goto LErrorLabel_;
+
+#if 0
+ break;
+#endif
+ }
+ }
+
+ exc->top = exc->new_top;
+
+ if ( exc->step_ins )
+ exc->IP += exc->length;
+
+ /* increment instruction counter and check if we didn't */
+ /* run this program for too long (e.g. infinite loops). */
+ if ( ++ins_counter > MAX_RUNNABLE_OPCODES )
+ return FT_THROW( Execution_Too_Long );
+
+ LSuiteLabel_:
+ if ( exc->IP >= exc->codeSize )
+ {
+ if ( exc->callTop > 0 )
+ {
+ exc->error = FT_THROW( Code_Overflow );
+ goto LErrorLabel_;
+ }
+ else
+ goto LNo_Error_;
+ }
+ } while ( !exc->instruction_trap );
+
+ LNo_Error_:
+ return FT_Err_Ok;
+
+ LErrorCodeOverflow_:
+ exc->error = FT_THROW( Code_Overflow );
+
+ LErrorLabel_:
+ /* If any errors have occurred, function tables may be broken. */
+ /* Force a re-execution of `prep' and `fpgm' tables if no */
+ /* bytecode debugger is run. */
+ if ( exc->error &&
+ !exc->instruction_trap &&
+ exc->curRange == tt_coderange_glyph )
+ {
+ FT_TRACE1(( " The interpreter returned error 0x%x\n", exc->error ));
+ exc->size->bytecode_ready = -1;
+ exc->size->cvt_ready = -1;
+ }
+
+ return exc->error;
+ }
+
+
+#endif /* TT_USE_BYTECODE_INTERPRETER */
+
+
+/* END */