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-rw-r--r--Build/source/libs/libttf/extend/ftxwidth.c186
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diff --git a/Build/source/libs/libttf/extend/ftxwidth.c b/Build/source/libs/libttf/extend/ftxwidth.c
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+/*******************************************************************
+ *
+ * ftxwidth.c 1.0
+ *
+ * Glyph Widths (and Heights) fast retrieval extension
+ *
+ * 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.
+ *
+ *
+ * This extension is used to parse the "glyf" table of a TrueType
+ * file in order to extract the bbox of a given range of glyphs.
+ *
+ * The bbox is then used to build font unit widths and height
+ * that are returned in two parallel arrays.
+ *
+ * This extension is needed by the FreeType/2 OS/2 Font Driver.
+ *
+ ******************************************************************/
+
+
+#include "ttconfig.h"
+#include "ftxwidth.h"
+#include "ttdebug.h"
+#include "ttobjs.h"
+#include "ttfile.h"
+#include "tttags.h"
+#include "ttload.h"
+
+/* Required by the tracing mode */
+
+#undef TT_COMPONENT
+#define TT_COMPONENT trace_any
+
+
+ /******************************************************************/
+ /* */
+ /* Function: TT_Get_Face_Widths */
+ /* */
+ /* Description: Returns the widths and/or heights of a given */
+ /* range of glyphs for a face. */
+ /* */
+ /* Input: */
+ /* face :: face handle */
+ /* */
+ /* first_glyph :: first glyph in range */
+ /* */
+ /* last_glyph :: last glyph in range */
+ /* */
+ /* widths :: address of table receiving the widths */
+ /* expressed in font units (ushorts). Set */
+ /* this parameter to NULL if you're not */
+ /* interested by these values. */
+ /* */
+ /* heights :: address of table receiving the heights */
+ /* expressed in font units (ushorts). Set */
+ /* this parameter to NULL if you're not */
+ /* interested by these values. */
+ /* */
+ /* Returns: */
+ /* Error code */
+ /* */
+ /* */
+ /******************************************************************/
+
+ EXPORT_FUNC
+ TT_Error TT_Get_Face_Widths( TT_Face face,
+ TT_UShort first_glyph,
+ TT_UShort last_glyph,
+ TT_UShort* widths,
+ TT_UShort* heights )
+ {
+ DEFINE_ALL_LOCALS;
+
+ PFace faze = HANDLE_Face(face);
+ UShort n;
+ Long table;
+
+ ULong glyf_offset; /* offset of glyph table in file */
+ UShort zero_width = 0; /* width of glyph 0 */
+ UShort zero_height = 0; /* height of glyph 0 */
+
+ Bool zero_loaded = 0;
+
+#ifndef TT_HUGE_PTR
+ PStorage locations;
+#else
+ Storage TT_HUGE_PTR * locations;
+#endif
+ TT_BBox bbox;
+
+
+ if ( !faze )
+ return TT_Err_Invalid_Face_Handle;
+
+ if ( last_glyph >= faze->numGlyphs ||
+ first_glyph > last_glyph )
+ return TT_Err_Invalid_Argument;
+
+ /* find "glyf" table */
+ table = TT_LookUp_Table( faze, TTAG_glyf );
+ if ( table < 0 )
+ {
+ PERROR(( "ERROR: there is no glyph table in this font file!\n" ));
+ return TT_Err_Glyf_Table_Missing;
+ }
+ glyf_offset = faze->dirTables[table].Offset;
+
+ /* now access stream */
+ if ( USE_Stream( faze->stream, stream ) )
+ return error;
+
+ locations = faze->glyphLocations + first_glyph;
+
+ /* loop to load each glyph in the range */
+ for ( n = first_glyph; n <= last_glyph; n++ )
+ {
+ if ( n + 1 < faze->numGlyphs &&
+ locations[0] == locations[1] )
+ {
+ /* Note : Glyph 0 is always used to indicate a missing glyph */
+ /* in a range. We must thus return its width and height */
+ /* where appropriate when we find an undefined glyph. */
+ if ( zero_loaded == 0 )
+ {
+ if ( FILE_Seek( glyf_offset + faze->glyphLocations[0] ) ||
+ ACCESS_Frame( 10L ) )
+ goto Fail;
+
+ (void)GET_Short(); /* skip number of contours */
+
+ bbox.xMin = GET_Short();
+ bbox.yMin = GET_Short();
+ bbox.xMax = GET_Short();
+ bbox.yMax = GET_Short();
+
+ FORGET_Frame();
+
+ zero_width = (UShort)(bbox.xMax - bbox.xMin);
+ zero_height = (UShort)(bbox.yMax - bbox.yMin);
+ zero_loaded = 1;
+ }
+
+ if ( widths )
+ *widths++ = zero_width;
+
+ if ( heights )
+ *heights++ = zero_height;
+ }
+ else
+ {
+ /* normal glyph, read header */
+ if ( FILE_Seek( glyf_offset + locations[0] ) ||
+ ACCESS_Frame( 10L ) )
+ goto Fail;
+
+ (void)GET_Short(); /* skip number of contours */
+
+ bbox.xMin = GET_Short();
+ bbox.yMin = GET_Short();
+ bbox.xMax = GET_Short();
+ bbox.yMax = GET_Short();
+
+ FORGET_Frame();
+
+ if ( widths )
+ *widths++ = (UShort)(bbox.xMax - bbox.xMin);
+
+ if ( heights )
+ *heights++ = (UShort)(bbox.yMax - bbox.yMin);
+ }
+ }
+
+ Fail:
+ DONE_Stream( stream );
+ return error;
+ }
+
+
+/* END */