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-rw-r--r--Build/source/libs/libttf/ttgload.c1351
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diff --git a/Build/source/libs/libttf/ttgload.c b/Build/source/libs/libttf/ttgload.c
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+/*******************************************************************
+ *
+ * ttgload.c 1.0
+ *
+ * TrueType Glyph Loader.
+ *
+ * Copyright 1996-1999 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.
+ *
+ ******************************************************************/
+
+#include "tttypes.h"
+#include "ttdebug.h"
+#include "ttcalc.h"
+#include "ttfile.h"
+
+#include "tttables.h"
+#include "ttobjs.h"
+#include "ttgload.h"
+
+#include "ttmemory.h"
+#include "tttags.h"
+#include "ttload.h"
+
+/* required by the tracing mode */
+#undef TT_COMPONENT
+#define TT_COMPONENT trace_gload
+
+
+/* composite font flags */
+
+#define ARGS_ARE_WORDS 0x001
+#define ARGS_ARE_XY_VALUES 0x002
+#define ROUND_XY_TO_GRID 0x004
+#define WE_HAVE_A_SCALE 0x008
+/* reserved 0x010 */
+#define MORE_COMPONENTS 0x020
+#define WE_HAVE_AN_XY_SCALE 0x040
+#define WE_HAVE_A_2X2 0x080
+#define WE_HAVE_INSTR 0x100
+#define USE_MY_METRICS 0x200
+
+
+/********************************************************/
+/* Return horizontal or vertical metrics in font units */
+/* for a given glyph. The metrics are the left side */
+/* bearing (resp. top side bearing) and advance width */
+/* (resp. advance height). */
+/* */
+/* This function will much probably move to another */
+/* component in the short future, but I haven't decided */
+/* which yet... */
+
+ LOCAL_FUNC
+ void TT_Get_Metrics( TT_Horizontal_Header* header,
+ UShort index,
+ Short* bearing,
+ UShort* advance )
+ {
+ PLongMetrics longs_m;
+
+ UShort k = header->number_Of_HMetrics;
+
+
+ if ( index < k )
+ {
+ longs_m = (PLongMetrics)header->long_metrics + index;
+ *bearing = longs_m->bearing;
+ *advance = longs_m->advance;
+ }
+ else
+ {
+ *bearing = ((PShortMetrics)header->short_metrics)[index - k];
+ *advance = ((PLongMetrics)header->long_metrics)[k - 1].advance;
+ }
+ }
+
+
+/********************************************************/
+/* Return horizontal metrics in font units for a given */
+/* glyph. If `check' is true, take care of mono-spaced */
+/* fonts by returning the advance width max. */
+
+ static void Get_HMetrics( PFace face,
+ UShort index,
+ Bool check,
+ Short* lsb,
+ UShort* aw )
+ {
+ TT_Get_Metrics( &face->horizontalHeader, index, lsb, aw );
+
+ if ( check && face->postscript.isFixedPitch )
+ *aw = face->horizontalHeader.advance_Width_Max;
+ }
+
+
+/********************************************************/
+/* Return advance width table for a given pixel size */
+/* if it is found in the font's `hdmx' table (if any). */
+
+ static PByte Get_Advance_Widths( PFace face,
+ UShort ppem )
+ {
+ UShort n;
+
+
+ for ( n = 0; n < face->hdmx.num_records; n++ )
+ if ( face->hdmx.records[n].ppem == ppem )
+ return face->hdmx.records[n].widths;
+
+ return NULL;
+ }
+
+
+/********************************************************/
+/* Copy current glyph into original one. */
+
+#define cur_to_org( n, zone ) \
+ MEM_Copy( (zone)->org, (zone)->cur, (n) * sizeof ( TT_Vector ) )
+
+/********************************************************/
+/* copy original glyph into current one */
+
+#define org_to_cur( n, zone ) \
+ MEM_Copy( (zone)->cur, (zone)->org, (n) * sizeof ( TT_Vector ) )
+
+/********************************************************/
+/* translate an array of coordinates */
+
+ static void translate_array( UShort n,
+ TT_Vector* coords,
+ TT_Pos delta_x,
+ TT_Pos delta_y )
+ {
+ UShort k;
+
+
+ if ( delta_x )
+ for ( k = 0; k < n; k++ )
+ coords[k].x += delta_x;
+
+ if ( delta_y )
+ for ( k = 0; k < n; k++ )
+ coords[k].y += delta_y;
+ }
+
+
+/********************************************************/
+/* mount one zone on top of another */
+
+ static void mount_zone( PGlyph_Zone source,
+ PGlyph_Zone target )
+ {
+ UShort np;
+ Short nc;
+
+ np = source->n_points;
+ nc = source->n_contours;
+
+ target->org = source->org + np;
+ target->cur = source->cur + np;
+ target->touch = source->touch + np;
+
+ target->contours = source->contours + nc;
+
+ target->n_points = 0;
+ target->n_contours = 0;
+ }
+
+
+/*******************************************************************
+ *
+ * Function: Load_Simple_Glyph
+ *
+ ******************************************************************/
+
+ static TT_Error Load_Simple_Glyph( PExecution_Context exec,
+ TT_Stream input,
+ Short n_contours,
+ Short left_contours,
+ UShort left_points,
+ UShort load_flags,
+ PSubglyph_Record subg )
+ {
+ DEFINE_LOAD_LOCALS( input );
+
+ PGlyph_Zone pts;
+ Short k;
+ UShort j;
+ UShort n_points, n_ins;
+ PFace face;
+ Byte* flag;
+ TT_Vector* vec;
+ TT_F26Dot6 x, y;
+
+
+ face = exec->face;
+
+ /* simple check */
+ if ( n_contours > left_contours )
+ {
+ PTRACE0(( "ERROR: Glyph index %ld has %d contours > left %d\n",
+ subg->index, n_contours, left_contours ));
+ return TT_Err_Too_Many_Contours;
+ }
+
+
+ /* preparing the execution context */
+ mount_zone( &subg->zone, &exec->pts );
+
+ /* reading the contours endpoints */
+ if ( ACCESS_Frame( (n_contours + 1) * 2L ) )
+ return error;
+
+ PTRACE4(( " Contour endpoints:" ));
+
+ for ( k = 0; k < n_contours; k++ )
+ {
+ exec->pts.contours[k] = GET_UShort();
+ PTRACE4(( " %d", exec->pts.contours[k] ));
+ }
+ PTRACE4(( "\n" ));
+
+ if ( n_contours > 0 )
+ n_points = exec->pts.contours[n_contours - 1] + 1;
+ else
+ n_points = 0;
+
+ n_ins = GET_UShort();
+
+ FORGET_Frame();
+
+ if ( n_points > left_points )
+ {
+ PTRACE0(( "ERROR: Too many points in glyph %ld\n", subg->index ));
+ return TT_Err_Too_Many_Points;
+ }
+
+ /* loading instructions */
+
+ PTRACE4(( " Instructions size: %d\n", n_ins ));
+
+ if ( n_ins > face->maxProfile.maxSizeOfInstructions )
+ {
+ PTRACE0(( "ERROR: Too many instructions!\n" ));
+ return TT_Err_Too_Many_Ins;
+ }
+
+ if ( FILE_Read( exec->glyphIns, n_ins ) )
+ return error;
+
+ if ( (error = Set_CodeRange( exec,
+ TT_CodeRange_Glyph,
+ exec->glyphIns,
+ n_ins )) != TT_Err_Ok )
+ return error;
+
+
+ /* read the flags */
+
+ if ( CHECK_ACCESS_Frame( n_points * 5L ) )
+ return error;
+
+ j = 0;
+ flag = exec->pts.touch;
+
+ while ( j < n_points )
+ {
+ Byte c, cnt;
+
+ flag[j] = c = GET_Byte();
+ j++;
+
+ if ( c & 8 )
+ {
+ cnt = GET_Byte();
+ while( cnt > 0 )
+ {
+ flag[j++] = c;
+ cnt--;
+ }
+ }
+ }
+
+ /* read the X */
+
+ x = 0;
+ vec = exec->pts.org;
+
+ for ( j = 0; j < n_points; j++ )
+ {
+ if ( flag[j] & 2 )
+ {
+ if ( flag[j] & 16 )
+ x += GET_Byte();
+ else
+ x -= GET_Byte();
+ }
+ else
+ {
+ if ( (flag[j] & 16) == 0 )
+ x += GET_Short();
+ }
+
+ vec[j].x = x;
+ }
+
+
+ /* read the Y */
+
+ y = 0;
+
+ for ( j = 0; j < n_points; j++ )
+ {
+ if ( flag[j] & 4 )
+ {
+ if ( flag[j] & 32 )
+ y += GET_Byte();
+ else
+ y -= GET_Byte();
+ }
+ else
+ {
+ if ( (flag[j] & 32) == 0 )
+ y += GET_Short();
+ }
+
+ vec[j].y = y;
+ }
+
+ FORGET_Frame();
+
+ /* Now add the two shadow points at n and n + 1. */
+ /* We need the left side bearing and advance width. */
+
+ /* pp1 = xMin - lsb */
+ vec[n_points].x = subg->metrics.bbox.xMin - subg->metrics.horiBearingX;
+ vec[n_points].y = 0;
+
+ /* pp2 = pp1 + aw */
+ vec[n_points+1].x = vec[n_points].x + subg->metrics.horiAdvance;
+ vec[n_points+1].y = 0;
+
+ /* clear the touch flags */
+
+ for ( j = 0; j < n_points; j++ )
+ exec->pts.touch[j] &= TT_Flag_On_Curve;
+
+ exec->pts.touch[n_points ] = 0;
+ exec->pts.touch[n_points + 1] = 0;
+
+ /* Note that we return two more points that are not */
+ /* part of the glyph outline. */
+
+ n_points += 2;
+
+ /* now eventually scale and hint the glyph */
+
+ pts = &exec->pts;
+ pts->n_points = n_points;
+ pts->n_contours = n_contours;
+
+ if ( (load_flags & TTLOAD_SCALE_GLYPH) == 0 )
+ {
+ /* no scaling, just copy the orig arrays into the cur ones */
+ org_to_cur( n_points, pts );
+ }
+ else
+ {
+ /* first scale the glyph points */
+
+ for ( j = 0; j < n_points; j++ )
+ {
+ pts->org[j].x = Scale_X( &exec->metrics, pts->org[j].x );
+ pts->org[j].y = Scale_Y( &exec->metrics, pts->org[j].y );
+ }
+
+ /* if hinting, round pp1, and shift the glyph accordingly */
+ if ( subg->is_hinted )
+ {
+ x = pts->org[n_points - 2].x;
+ x = ((x+32) & -64) - x;
+ translate_array( n_points, pts->org, x, 0 );
+
+ org_to_cur( n_points, pts );
+
+ pts->cur[n_points - 1].x = (pts->cur[n_points - 1].x + 32) & -64;
+
+ /* now consider hinting */
+ if ( n_ins > 0 )
+ {
+ exec->is_composite = FALSE;
+ exec->pedantic_hinting = load_flags & TTLOAD_PEDANTIC;
+
+ error = Context_Run( exec, FALSE );
+ if (error && exec->pedantic_hinting)
+ return error;
+ }
+ }
+ else
+ org_to_cur( n_points, pts );
+ }
+
+ /* save glyph phantom points */
+ if (!subg->preserve_pps)
+ {
+ subg->pp1 = pts->cur[n_points - 2];
+ subg->pp2 = pts->cur[n_points - 1];
+ }
+
+ return TT_Err_Ok;
+ }
+
+
+/*******************************************************************
+ *
+ * Function : Load_Composite_End
+ *
+ ******************************************************************/
+
+ static
+ TT_Error Load_Composite_End( UShort n_points,
+ Short n_contours,
+ PExecution_Context exec,
+ PSubglyph_Record subg,
+ UShort load_flags,
+ TT_Stream input )
+ {
+ DEFINE_LOAD_LOCALS( input );
+
+ UShort k, n_ins;
+ PGlyph_Zone pts;
+
+
+ if ( subg->is_hinted &&
+ subg->element_flag & WE_HAVE_INSTR )
+ {
+ if ( ACCESS_Frame( 2L ) )
+ return error;
+
+ n_ins = GET_UShort(); /* read size of instructions */
+ FORGET_Frame();
+
+ PTRACE4(( " Instructions size: %d\n", n_ins ));
+
+ if ( n_ins > exec->face->maxProfile.maxSizeOfInstructions )
+ {
+ PTRACE0(( "ERROR: Too many instructions in composite glyph %ld\n",
+ subg->index ));
+ return TT_Err_Too_Many_Ins;
+ }
+
+ if ( FILE_Read( exec->glyphIns, n_ins ) )
+ return error;
+
+ error = Set_CodeRange( exec,
+ TT_CodeRange_Glyph,
+ exec->glyphIns,
+ n_ins );
+
+ if ( error )
+ return error;
+ }
+ else
+ n_ins = 0;
+
+
+ /* prepare the execution context */
+ n_points += 2;
+ exec->pts = subg->zone;
+ pts = &exec->pts;
+
+ pts->n_points = n_points;
+ pts->n_contours = n_contours;
+
+ /* add phantom points */
+ pts->cur[n_points - 2] = subg->pp1;
+ pts->cur[n_points - 1] = subg->pp2;
+
+ pts->touch[n_points - 1] = 0;
+ pts->touch[n_points - 2] = 0;
+
+ /* if hinting, round the phantom points */
+ if ( subg->is_hinted )
+ {
+ pts->cur[n_points - 2].x = (subg->pp1.x + 32) & -64;
+ pts->cur[n_points - 1].x = (subg->pp2.x + 32) & -64;
+ }
+
+ for ( k = 0; k < n_points; k++ )
+ pts->touch[k] &= TT_Flag_On_Curve;
+
+ cur_to_org( n_points, pts );
+
+ /* now consider hinting */
+ if ( subg->is_hinted && n_ins > 0 )
+ {
+ exec->is_composite = TRUE;
+ exec->pedantic_hinting = load_flags & TTLOAD_PEDANTIC;
+
+ error = Context_Run( exec, FALSE );
+ if (error && exec->pedantic_hinting)
+ return error;
+ }
+
+ /* save glyph origin and advance points */
+ subg->pp1 = pts->cur[n_points - 2];
+ subg->pp2 = pts->cur[n_points - 1];
+
+ return TT_Err_Ok;
+ }
+
+
+/*******************************************************************
+ *
+ * Function : Init_Glyph_Component
+ *
+ ******************************************************************/
+
+ static
+ void Init_Glyph_Component( PSubglyph_Record element,
+ PSubglyph_Record original,
+ PExecution_Context exec )
+ {
+ element->index = -1;
+ element->is_scaled = FALSE;
+ element->is_hinted = FALSE;
+
+ if ( original )
+ mount_zone( &original->zone, &element->zone );
+ else
+ element->zone = exec->pts;
+
+ element->zone.n_contours = 0;
+ element->zone.n_points = 0;
+
+ element->arg1 = 0;
+ element->arg2 = 0;
+
+ element->element_flag = 0;
+ element->preserve_pps = FALSE;
+
+ element->transform.xx = 1L << 16;
+ element->transform.xy = 0;
+ element->transform.yx = 0;
+ element->transform.yy = 1L << 16;
+
+ element->transform.ox = 0;
+ element->transform.oy = 0;
+
+ element->metrics.horiBearingX = 0;
+ element->metrics.horiAdvance = 0;
+ }
+
+
+
+ LOCAL_FUNC
+ TT_Error Load_TrueType_Glyph( PInstance instance,
+ PGlyph glyph,
+ UShort glyph_index,
+ UShort load_flags )
+ {
+ enum TPhases_
+ {
+ Load_Exit,
+ Load_Glyph,
+ Load_Header,
+ Load_Simple,
+ Load_Composite,
+ Load_End
+ };
+
+ typedef enum TPhases_ TPhases;
+
+ DEFINE_ALL_LOCALS;
+
+ PFace face;
+
+ UShort num_points;
+ Short num_contours;
+ UShort left_points;
+ Short left_contours;
+ UShort num_elem_points;
+
+ Long table;
+ UShort load_top;
+ Long k, l;
+ UShort new_flags;
+ Long index;
+ UShort u, v;
+
+ Long glyph_offset, offset;
+
+ TT_F26Dot6 x, y, nx, ny;
+
+ Fixed xx, xy, yx, yy;
+
+ PExecution_Context exec;
+
+ PSubglyph_Record subglyph, subglyph2;
+
+ TGlyph_Zone base_pts;
+
+ TPhases phase;
+ PByte widths;
+
+/* TT_Glyph_Loader_Callback cacheCb; */
+/* TT_Outline cached_outline; */
+
+
+ /* first of all, check arguments */
+ if ( !glyph )
+ return TT_Err_Invalid_Glyph_Handle;
+
+ face = glyph->face;
+ if ( !face )
+ return TT_Err_Invalid_Glyph_Handle;
+
+ if ( glyph_index >= face->numGlyphs )
+ return TT_Err_Invalid_Glyph_Index;
+
+ if ( instance && (load_flags & TTLOAD_SCALE_GLYPH) == 0 )
+ {
+ instance = 0;
+ load_flags &= ~( TTLOAD_SCALE_GLYPH | TTLOAD_HINT_GLYPH );
+ }
+
+ table = TT_LookUp_Table( face, TTAG_glyf );
+ if ( table < 0 )
+ {
+ PTRACE0(( "ERROR: There is no glyph table in this font file!\n" ));
+ return TT_Err_Glyf_Table_Missing;
+ }
+
+ glyph_offset = face->dirTables[table].Offset;
+
+ /* query new execution context */
+
+ if ( instance && instance->debug )
+ exec = instance->context;
+ else
+ exec = New_Context( face );
+
+ if ( !exec )
+ return TT_Err_Could_Not_Find_Context;
+
+ Context_Load( exec, face, instance );
+
+ if ( instance )
+ {
+ if ( instance->GS.instruct_control & 2 )
+ exec->GS = Default_GraphicsState;
+ else
+ exec->GS = instance->GS;
+ /* load default graphics state */
+
+ glyph->outline.high_precision = ( instance->metrics.y_ppem < 24 );
+ }
+
+ /* save its critical pointers, as they'll be modified during load */
+ base_pts = exec->pts;
+
+ /* init variables */
+ left_points = face->maxPoints;
+ left_contours = face->maxContours;
+
+ num_points = 0;
+ num_contours = 0;
+
+ load_top = 0;
+ subglyph = exec->loadStack;
+
+ Init_Glyph_Component( subglyph, NULL, exec );
+
+ subglyph->index = glyph_index;
+ subglyph->is_hinted = load_flags & TTLOAD_HINT_GLYPH;
+
+ /* when the cvt program has disabled hinting, the argument */
+ /* is ignored. */
+ if ( instance && instance->GS.instruct_control & 1 )
+ subglyph->is_hinted = FALSE;
+
+
+ /* now access stream */
+
+ if ( USE_Stream( face->stream, stream ) )
+ goto Fin;
+
+ /* Main loading loop */
+
+ phase = Load_Glyph;
+ index = 0;
+
+ while ( phase != Load_Exit )
+ {
+ subglyph = exec->loadStack + load_top;
+
+ switch ( phase )
+ {
+ /************************************************************/
+ /* */
+ /* Load_Glyph state */
+ /* */
+ /* reading a glyph's generic header to determine */
+ /* whether it's simple or composite */
+ /* */
+ /* exit states: Load_Header and Load_End */
+
+ case Load_Glyph:
+ /* check glyph index and table */
+
+ index = subglyph->index;
+ if ( index < 0 || index >= face->numGlyphs )
+ {
+ error = TT_Err_Invalid_Glyph_Index;
+ goto Fail;
+ }
+
+ /* get horizontal metrics */
+
+ {
+ Short left_bearing;
+ UShort advance_width;
+
+
+ Get_HMetrics( face, (UShort)index,
+ !(load_flags & TTLOAD_IGNORE_GLOBAL_ADVANCE_WIDTH),
+ &left_bearing,
+ &advance_width );
+
+ subglyph->metrics.horiBearingX = left_bearing;
+ subglyph->metrics.horiAdvance = advance_width;
+ }
+
+ phase = Load_Header;
+
+
+ /* The cache callback isn't part of the FreeType release yet */
+ /* It is discarded for the moment.. */
+ /* */
+#if 0
+ if ( instance )
+ {
+ /* is the glyph in an outline cache ? */
+ cacheCb = instance->owner->engine->glCallback;
+ if ( cacheCb && 0 ) /* disabled */
+ {
+ /* we have a callback */
+ error = cacheCb( instance->generic,
+ index, &cached_outline, &x, &y );
+ if ( !error )
+ {
+ /* no error, then append the outline to the current subglyph */
+ /* error = Append_Outline( subglyph,
+ &left_points,
+ &left_contours,
+ &cached_outline ); */
+ phase = Load_End;
+ }
+ }
+ }
+#endif
+ break;
+
+
+ /************************************************************/
+ /* */
+ /* Load_Header state */
+ /* */
+ /* reading a glyph's generic header to determine */
+ /* wether it's simple or composite */
+ /* */
+ /* exit states: Load_Simple and Load_Composite */
+ /* */
+
+ case Load_Header: /* load glyph */
+
+ if ( index + 1 < face->numLocations &&
+ face->glyphLocations[index] == face->glyphLocations[index + 1] )
+ {
+ /* as described by Frederic Loyer, these are spaces, and */
+ /* not the unknown glyph. */
+
+ num_contours = 0;
+ num_points = 0;
+
+ subglyph->metrics.bbox.xMin = 0;
+ subglyph->metrics.bbox.xMax = 0;
+ subglyph->metrics.bbox.yMin = 0;
+ subglyph->metrics.bbox.yMax = 0;
+
+ subglyph->pp1.x = 0;
+ subglyph->pp2.x = subglyph->metrics.horiAdvance;
+ if (load_flags & TTLOAD_SCALE_GLYPH)
+ subglyph->pp2.x = Scale_X( &exec->metrics, subglyph->pp2.x );
+
+ exec->glyphSize = 0;
+ phase = Load_End;
+ break;
+ }
+
+ offset = glyph_offset + face->glyphLocations[index];
+
+ /* read first glyph header */
+ if ( FILE_Seek( offset ) ||
+ ACCESS_Frame( 10L ) )
+ goto Fail_File;
+
+ num_contours = GET_Short();
+
+ subglyph->metrics.bbox.xMin = GET_Short();
+ subglyph->metrics.bbox.yMin = GET_Short();
+ subglyph->metrics.bbox.xMax = GET_Short();
+ subglyph->metrics.bbox.yMax = GET_Short();
+
+ FORGET_Frame();
+
+ PTRACE6(( "Glyph %ld:\n", index ));
+ PTRACE6(( " # of contours: %d\n", num_contours ));
+ PTRACE6(( " xMin: %4d xMax: %4d\n",
+ subglyph->metrics.bbox.xMin,
+ subglyph->metrics.bbox.xMax ));
+ PTRACE6(( " yMin: %4d yMax: %4d\n",
+ subglyph->metrics.bbox.yMin,
+ subglyph->metrics.bbox.yMax ));
+
+ if ( num_contours > left_contours )
+ {
+ PTRACE0(( "ERROR: Too many contours for glyph %ld\n", index ));
+ error = TT_Err_Too_Many_Contours;
+ goto Fail;
+ }
+
+ subglyph->pp1.x = subglyph->metrics.bbox.xMin -
+ subglyph->metrics.horiBearingX;
+ subglyph->pp1.y = 0;
+ subglyph->pp2.x = subglyph->pp1.x + subglyph->metrics.horiAdvance;
+ if (load_flags & TTLOAD_SCALE_GLYPH)
+ {
+ subglyph->pp1.x = Scale_X( &exec->metrics, subglyph->pp1.x );
+ subglyph->pp2.x = Scale_X( &exec->metrics, subglyph->pp2.x );
+ }
+
+ /* is it a simple glyph ? */
+ if ( num_contours > 0 )
+ phase = Load_Simple;
+ else
+ phase = Load_Composite;
+
+ break;
+
+
+ /************************************************************/
+ /* */
+ /* Load_Simple state */
+ /* */
+ /* reading a simple glyph (num_contours must be set to */
+ /* the glyph's number of contours.) */
+ /* */
+ /* exit states : Load_End */
+ /* */
+
+ case Load_Simple:
+ new_flags = load_flags;
+
+ /* disable hinting when scaling */
+ if ( !subglyph->is_hinted )
+ new_flags &= ~TTLOAD_HINT_GLYPH;
+
+ error = Load_Simple_Glyph( exec,
+ stream,
+ num_contours,
+ left_contours,
+ left_points,
+ new_flags,
+ subglyph );
+ if ( error )
+ goto Fail;
+
+ /* Note: We could have put the simple loader source there */
+ /* but the code is fat enough already :-) */
+
+ num_points = exec->pts.n_points - 2;
+
+ phase = Load_End;
+
+ break;
+
+
+ /************************************************************/
+ /* */
+ /* Load_Composite state */
+ /* */
+ /* reading a composite glyph header a pushing a new */
+ /* load element on the stack. */
+ /* */
+ /* exit states: Load_Glyph */
+ /* */
+
+ case Load_Composite:
+
+ /* create a new element on the stack */
+ load_top++;
+
+ if ( load_top > face->maxComponents )
+ {
+ error = TT_Err_Invalid_Composite;
+ goto Fail;
+ }
+
+ subglyph2 = exec->loadStack + load_top;
+
+ Init_Glyph_Component( subglyph2, subglyph, NULL );
+ subglyph2->is_hinted = subglyph->is_hinted;
+
+ /* now read composite header */
+
+ if ( ACCESS_Frame( 4L ) )
+ goto Fail_File;
+
+ subglyph->element_flag = new_flags = GET_UShort();
+
+ subglyph2->index = GET_UShort();
+
+ FORGET_Frame();
+
+ k = 1 + 1;
+
+ if ( new_flags & ARGS_ARE_WORDS )
+ k *= 2;
+
+ if ( new_flags & WE_HAVE_A_SCALE )
+ k += 2;
+
+ else if ( new_flags & WE_HAVE_AN_XY_SCALE )
+ k += 4;
+
+ else if ( new_flags & WE_HAVE_A_2X2 )
+ k += 8;
+
+ if ( ACCESS_Frame( k ) )
+ goto Fail_File;
+
+ if ( new_flags & ARGS_ARE_WORDS )
+ {
+ k = GET_Short();
+ l = GET_Short();
+ }
+ else
+ {
+ k = GET_Char();
+ l = GET_Char();
+ }
+
+ subglyph->arg1 = k;
+ subglyph->arg2 = l;
+
+ if ( new_flags & ARGS_ARE_XY_VALUES )
+ {
+ subglyph->transform.ox = k;
+ subglyph->transform.oy = l;
+ }
+
+ xx = 1L << 16;
+ xy = 0;
+ yx = 0;
+ yy = 1L << 16;
+
+ if ( new_flags & WE_HAVE_A_SCALE )
+ {
+ xx = (Fixed)GET_Short() << 2;
+ yy = xx;
+ subglyph2->is_scaled = TRUE;
+ }
+ else if ( new_flags & WE_HAVE_AN_XY_SCALE )
+ {
+ xx = (Fixed)GET_Short() << 2;
+ yy = (Fixed)GET_Short() << 2;
+ subglyph2->is_scaled = TRUE;
+ }
+ else if ( new_flags & WE_HAVE_A_2X2 )
+ {
+ xx = (Fixed)GET_Short() << 2;
+ xy = (Fixed)GET_Short() << 2;
+ yx = (Fixed)GET_Short() << 2;
+ yy = (Fixed)GET_Short() << 2;
+ subglyph2->is_scaled = TRUE;
+ }
+
+ FORGET_Frame();
+
+ subglyph->transform.xx = xx;
+ subglyph->transform.xy = xy;
+ subglyph->transform.yx = yx;
+ subglyph->transform.yy = yy;
+
+ k = TT_MulFix( xx, yy ) - TT_MulFix( xy, yx );
+
+ /* disable hinting in case of scaling/slanting */
+ if ( ABS( k ) != (1L << 16) )
+ subglyph2->is_hinted = FALSE;
+
+ subglyph->file_offset = FILE_Pos();
+
+ phase = Load_Glyph;
+
+ break;
+
+
+ /************************************************************/
+ /* */
+ /* Load_End state */
+ /* */
+ /* after loading a glyph, apply transformation and offset */
+ /* where necessary, pops element and continue or */
+ /* stop process. */
+ /* */
+ /* exit states : Load_Composite and Load_Exit */
+ /* */
+
+ case Load_End:
+ if ( load_top > 0 )
+ {
+ subglyph2 = subglyph;
+
+ load_top--;
+ subglyph = exec->loadStack + load_top;
+
+ /* check advance width and left side bearing */
+
+ if ( !subglyph->preserve_pps &&
+ subglyph->element_flag & USE_MY_METRICS )
+ {
+ subglyph->metrics.horiBearingX = subglyph2->metrics.horiBearingX;
+ subglyph->metrics.horiAdvance = subglyph2->metrics.horiAdvance;
+
+ subglyph->pp1 = subglyph2->pp1;
+ subglyph->pp2 = subglyph2->pp2;
+
+ subglyph->preserve_pps = TRUE;
+ }
+
+ /* apply scale */
+
+ if ( subglyph2->is_scaled )
+ {
+ TT_Vector* cur = subglyph2->zone.cur;
+ TT_Vector* org = subglyph2->zone.org;
+
+ for ( u = 0; u < num_points; u++ )
+ {
+ nx = TT_MulFix( cur->x, subglyph->transform.xx ) +
+ TT_MulFix( cur->y, subglyph->transform.yx );
+
+ ny = TT_MulFix( cur->x, subglyph->transform.xy ) +
+ TT_MulFix( cur->y, subglyph->transform.yy );
+
+ cur->x = nx;
+ cur->y = ny;
+
+ nx = TT_MulFix( org->x, subglyph->transform.xx ) +
+ TT_MulFix( org->y, subglyph->transform.yx );
+
+ ny = TT_MulFix( org->x, subglyph->transform.xy ) +
+ TT_MulFix( org->y, subglyph->transform.yy );
+
+ org->x = nx;
+ org->y = ny;
+
+ cur++;
+ org++;
+ }
+ }
+
+ /* adjust counts */
+
+ num_elem_points = subglyph->zone.n_points;
+
+ for ( k = 0; k < num_contours; k++ )
+ subglyph2->zone.contours[k] += num_elem_points;
+
+ subglyph->zone.n_points += num_points;
+ subglyph->zone.n_contours += num_contours;
+
+ left_points -= num_points;
+ left_contours -= num_contours;
+
+ if ( !(subglyph->element_flag & ARGS_ARE_XY_VALUES) )
+ {
+ /* move second glyph according to control points */
+ /* the attach points are relative to the specific component */
+
+ u = (UShort)subglyph->arg1;
+ v = (UShort)subglyph->arg2;
+
+ if ( u >= num_elem_points ||
+ v >= num_points )
+ {
+ error = TT_Err_Invalid_Composite;
+ goto Fail;
+ }
+
+ /* adjust count */
+ v += num_elem_points;
+
+ x = subglyph->zone.cur[u].x - subglyph->zone.cur[v].x;
+ y = subglyph->zone.cur[u].y - subglyph->zone.cur[v].y;
+ }
+ else
+ {
+ /* apply offset */
+
+ x = subglyph->transform.ox;
+ y = subglyph->transform.oy;
+
+ if ( load_flags & TTLOAD_SCALE_GLYPH )
+ {
+ x = Scale_X( &exec->metrics, x );
+ y = Scale_Y( &exec->metrics, y );
+
+ if ( subglyph->element_flag & ROUND_XY_TO_GRID )
+ {
+ x = (x+32) & -64;
+ y = (y+32) & -64;
+ }
+ }
+ }
+
+ translate_array( num_points, subglyph2->zone.cur, x, y );
+
+ cur_to_org( num_points, &subglyph2->zone );
+
+ num_points = subglyph->zone.n_points;
+ num_contours = subglyph->zone.n_contours;
+
+ /* check for last component */
+
+ if ( FILE_Seek( subglyph->file_offset ) )
+ goto Fail_File;
+
+ if ( subglyph->element_flag & MORE_COMPONENTS )
+ phase = Load_Composite;
+ else
+ {
+ error = Load_Composite_End( num_points,
+ num_contours,
+ exec,
+ subglyph,
+ load_flags,
+ stream );
+ if ( error )
+ goto Fail;
+
+ phase = Load_End;
+ }
+ }
+ else
+ phase = Load_Exit;
+
+ break;
+
+
+ case Load_Exit:
+ break;
+ }
+ }
+
+ /* finally, copy the points arrays to the glyph object */
+
+ exec->pts = base_pts;
+
+ for ( u = 0; u < num_points + 2; u++ )
+ {
+ glyph->outline.points[u] = exec->pts.cur[u];
+ glyph->outline.flags [u] = exec->pts.touch[u];
+ }
+
+ for ( k = 0; k < num_contours; k++ )
+ glyph->outline.contours[k] = exec->pts.contours[k];
+
+ glyph->outline.n_points = num_points;
+ glyph->outline.n_contours = num_contours;
+ glyph->outline.second_pass = TRUE;
+
+ /* translate array so that (0,0) is the glyph's origin */
+ translate_array( num_points + 2,
+ glyph->outline.points,
+ -subglyph->pp1.x,
+ 0 );
+
+ TT_Get_Outline_BBox( &glyph->outline, &glyph->metrics.bbox );
+
+ if ( subglyph->is_hinted )
+ {
+ /* grid-fit the bounding box */
+ glyph->metrics.bbox.xMin &= -64;
+ glyph->metrics.bbox.yMin &= -64;
+ glyph->metrics.bbox.xMax = (glyph->metrics.bbox.xMax+63) & -64;
+ glyph->metrics.bbox.yMax = (glyph->metrics.bbox.yMax+63) & -64;
+ }
+
+ /* get the device-independent scaled horizontal metrics */
+ /* take care of fixed-pitch fonts... */
+ {
+ TT_Pos left_bearing;
+ TT_Pos advance;
+
+
+ left_bearing = subglyph->metrics.horiBearingX;
+ advance = subglyph->metrics.horiAdvance;
+
+ if ( face->postscript.isFixedPitch )
+ advance = face->horizontalHeader.advance_Width_Max;
+
+ if ( load_flags & TTLOAD_SCALE_GLYPH )
+ {
+ left_bearing = Scale_X( &exec->metrics, left_bearing );
+ advance = Scale_X( &exec->metrics, advance );
+ }
+
+ glyph->metrics.linearHoriBearingX = left_bearing;
+ glyph->metrics.linearHoriAdvance = advance;
+ }
+
+ glyph->metrics.horiBearingX = glyph->metrics.bbox.xMin;
+ glyph->metrics.horiBearingY = glyph->metrics.bbox.yMax;
+ glyph->metrics.horiAdvance = subglyph->pp2.x - subglyph->pp1.x;
+
+ /* Now take care of vertical metrics. In the case where there is */
+ /* no vertical information within the font (relatively common), make */
+ /* up some metrics `by hand' ... */
+
+ {
+ Short top_bearing; /* vertical top side bearing (EM units) */
+ UShort advance_height; /* vertical advance height (EM units) */
+
+ TT_Pos left; /* scaled vertical left side bearing */
+ TT_Pos Top; /* scaled original vertical top side bearing */
+ TT_Pos top; /* scaled vertical top side bearing */
+ TT_Pos advance; /* scaled vertical advance height */
+
+
+ /* Get the unscaled `tsb' and `ah' values */
+ if ( face->verticalInfo &&
+ face->verticalHeader.number_Of_VMetrics > 0 )
+ {
+ /* Don't assume that both the vertical header and vertical */
+ /* metrics are present in the same font :-) */
+
+ TT_Get_Metrics( (TT_Horizontal_Header*)&face->verticalHeader,
+ glyph_index,
+ &top_bearing,
+ &advance_height );
+ }
+ else
+ {
+ /* Make up the distances from the horizontal header.. */
+
+ /* NOTE: The OS/2 values are the only `portable' ones, */
+ /* which is why we use them... */
+ /* */
+ /* NOTE2: The sTypoDescender is negative, which is why */
+ /* we compute the baseline-to-baseline distance */
+ /* here with : */
+ /* ascender - descender + linegap */
+ /* */
+ top_bearing = (Short) (face->os2.sTypoLineGap / 2);
+ advance_height = (UShort)(face->os2.sTypoAscender -
+ face->os2.sTypoDescender +
+ face->os2.sTypoLineGap);
+ }
+
+ /* We must adjust the top_bearing value from the bounding box given
+ in the glyph header to te bounding box calculated with
+ TT_Get_Outline_BBox() */
+
+ /* scale the metrics */
+ if ( load_flags & TTLOAD_SCALE_GLYPH )
+ {
+ Top = Scale_Y( &exec->metrics, top_bearing );
+ top = Scale_Y( &exec->metrics,
+ top_bearing + subglyph->metrics.bbox.yMax ) -
+ glyph->metrics.bbox.yMax;
+ advance = Scale_Y( &exec->metrics, advance_height );
+ }
+ else
+ {
+ Top = top_bearing;
+ top = top_bearing + subglyph->metrics.bbox.yMax -
+ glyph->metrics.bbox.yMax;
+ advance = advance_height;
+ }
+
+ glyph->metrics.linearVertBearingY = Top;
+ glyph->metrics.linearVertAdvance = advance;
+
+ /* XXX : for now, we have no better algo for the lsb, but it should */
+ /* work ok.. */
+ /* */
+ left = ( glyph->metrics.bbox.xMin - glyph->metrics.bbox.xMax ) / 2;
+
+ /* grid-fit them if necessary */
+ if ( subglyph->is_hinted )
+ {
+ left &= -64;
+ top = (top + 63) & -64;
+ advance = (advance + 32) & -64;
+ }
+
+ glyph->metrics.vertBearingX = left;
+ glyph->metrics.vertBearingY = top;
+ glyph->metrics.vertAdvance = advance;
+ }
+
+ /* Adjust advance width to the value contained in the hdmx table. */
+ if ( !exec->face->postscript.isFixedPitch && instance &&
+ subglyph->is_hinted )
+ {
+ widths = Get_Advance_Widths( exec->face,
+ exec->instance->metrics.x_ppem );
+ if ( widths )
+ glyph->metrics.horiAdvance = widths[glyph_index] << 6;
+ }
+
+ glyph->outline.dropout_mode = (Char)exec->GS.scan_type;
+
+ error = TT_Err_Ok;
+
+ Fail_File:
+ Fail:
+ DONE_Stream( stream );
+
+ Fin:
+
+ /* reset the execution context */
+ exec->pts = base_pts;
+
+ if ( !instance || !instance->debug )
+ Done_Context( exec );
+
+ return error;
+ }
+
+
+/* END */