--- a/misc/libfreetype/src/type1/t1afm.c Fri Oct 11 11:55:31 2013 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,397 +0,0 @@
-/***************************************************************************/
-/* */
-/* t1afm.c */
-/* */
-/* AFM support for Type 1 fonts (body). */
-/* */
-/* Copyright 1996-2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, */
-/* 2010 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 <ft2build.h>
-#include "t1afm.h"
-#include "t1errors.h"
-#include FT_INTERNAL_STREAM_H
-#include FT_INTERNAL_POSTSCRIPT_AUX_H
-
-
- /*************************************************************************/
- /* */
- /* 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_t1afm
-
-
- FT_LOCAL_DEF( void )
- T1_Done_Metrics( FT_Memory memory,
- AFM_FontInfo fi )
- {
- FT_FREE( fi->KernPairs );
- fi->NumKernPair = 0;
-
- FT_FREE( fi->TrackKerns );
- fi->NumTrackKern = 0;
-
- FT_FREE( fi );
- }
-
-
- /* read a glyph name and return the equivalent glyph index */
- static FT_Int
- t1_get_index( const char* name,
- FT_Offset len,
- void* user_data )
- {
- T1_Font type1 = (T1_Font)user_data;
- FT_Int n;
-
-
- /* PS string/name length must be < 16-bit */
- if ( len > 0xFFFFU )
- return 0;
-
- for ( n = 0; n < type1->num_glyphs; n++ )
- {
- char* gname = (char*)type1->glyph_names[n];
-
-
- if ( gname && gname[0] == name[0] &&
- ft_strlen( gname ) == len &&
- ft_strncmp( gname, name, len ) == 0 )
- return n;
- }
-
- return 0;
- }
-
-
-#undef KERN_INDEX
-#define KERN_INDEX( g1, g2 ) ( ( (FT_ULong)(g1) << 16 ) | (g2) )
-
-
- /* compare two kerning pairs */
- FT_CALLBACK_DEF( int )
- compare_kern_pairs( const void* a,
- const void* b )
- {
- AFM_KernPair pair1 = (AFM_KernPair)a;
- AFM_KernPair pair2 = (AFM_KernPair)b;
-
- FT_ULong index1 = KERN_INDEX( pair1->index1, pair1->index2 );
- FT_ULong index2 = KERN_INDEX( pair2->index1, pair2->index2 );
-
-
- if ( index1 > index2 )
- return 1;
- else if ( index1 < index2 )
- return -1;
- else
- return 0;
- }
-
-
- /* parse a PFM file -- for now, only read the kerning pairs */
- static FT_Error
- T1_Read_PFM( FT_Face t1_face,
- FT_Stream stream,
- AFM_FontInfo fi )
- {
- FT_Error error = T1_Err_Ok;
- FT_Memory memory = stream->memory;
- FT_Byte* start;
- FT_Byte* limit;
- FT_Byte* p;
- AFM_KernPair kp;
- FT_Int width_table_length;
- FT_CharMap oldcharmap;
- FT_CharMap charmap;
- FT_Int n;
-
-
- start = (FT_Byte*)stream->cursor;
- limit = (FT_Byte*)stream->limit;
- p = start;
-
- /* Figure out how long the width table is. */
- /* This info is a little-endian short at offset 99. */
- p = start + 99;
- if ( p + 2 > limit )
- {
- error = T1_Err_Unknown_File_Format;
- goto Exit;
- }
- width_table_length = FT_PEEK_USHORT_LE( p );
-
- p += 18 + width_table_length;
- if ( p + 0x12 > limit || FT_PEEK_USHORT_LE( p ) < 0x12 )
- /* extension table is probably optional */
- goto Exit;
-
- /* Kerning offset is 14 bytes from start of extensions table. */
- p += 14;
- p = start + FT_PEEK_ULONG_LE( p );
-
- if ( p == start )
- /* zero offset means no table */
- goto Exit;
-
- if ( p + 2 > limit )
- {
- error = T1_Err_Unknown_File_Format;
- goto Exit;
- }
-
- fi->NumKernPair = FT_PEEK_USHORT_LE( p );
- p += 2;
- if ( p + 4 * fi->NumKernPair > limit )
- {
- error = T1_Err_Unknown_File_Format;
- goto Exit;
- }
-
- /* Actually, kerning pairs are simply optional! */
- if ( fi->NumKernPair == 0 )
- goto Exit;
-
- /* allocate the pairs */
- if ( FT_QNEW_ARRAY( fi->KernPairs, fi->NumKernPair ) )
- goto Exit;
-
- /* now, read each kern pair */
- kp = fi->KernPairs;
- limit = p + 4 * fi->NumKernPair;
-
- /* PFM kerning data are stored by encoding rather than glyph index, */
- /* so find the PostScript charmap of this font and install it */
- /* temporarily. If we find no PostScript charmap, then just use */
- /* the default and hope it is the right one. */
- oldcharmap = t1_face->charmap;
- charmap = NULL;
-
- for ( n = 0; n < t1_face->num_charmaps; n++ )
- {
- charmap = t1_face->charmaps[n];
- /* check against PostScript pseudo platform */
- if ( charmap->platform_id == 7 )
- {
- error = FT_Set_Charmap( t1_face, charmap );
- if ( error )
- goto Exit;
- break;
- }
- }
-
- /* Kerning info is stored as: */
- /* */
- /* encoding of first glyph (1 byte) */
- /* encoding of second glyph (1 byte) */
- /* offset (little-endian short) */
- for ( ; p < limit ; p += 4 )
- {
- kp->index1 = FT_Get_Char_Index( t1_face, p[0] );
- kp->index2 = FT_Get_Char_Index( t1_face, p[1] );
-
- kp->x = (FT_Int)FT_PEEK_SHORT_LE(p + 2);
- kp->y = 0;
-
- kp++;
- }
-
- if ( oldcharmap != NULL )
- error = FT_Set_Charmap( t1_face, oldcharmap );
- if ( error )
- goto Exit;
-
- /* now, sort the kern pairs according to their glyph indices */
- ft_qsort( fi->KernPairs, fi->NumKernPair, sizeof ( AFM_KernPairRec ),
- compare_kern_pairs );
-
- Exit:
- if ( error )
- {
- FT_FREE( fi->KernPairs );
- fi->NumKernPair = 0;
- }
-
- return error;
- }
-
-
- /* parse a metrics file -- either AFM or PFM depending on what */
- /* it turns out to be */
- FT_LOCAL_DEF( FT_Error )
- T1_Read_Metrics( FT_Face t1_face,
- FT_Stream stream )
- {
- PSAux_Service psaux;
- FT_Memory memory = stream->memory;
- AFM_ParserRec parser;
- AFM_FontInfo fi = NULL;
- FT_Error error = T1_Err_Unknown_File_Format;
- T1_Font t1_font = &( (T1_Face)t1_face )->type1;
-
-
- if ( FT_NEW( fi ) ||
- FT_FRAME_ENTER( stream->size ) )
- goto Exit;
-
- fi->FontBBox = t1_font->font_bbox;
- fi->Ascender = t1_font->font_bbox.yMax;
- fi->Descender = t1_font->font_bbox.yMin;
-
- psaux = (PSAux_Service)( (T1_Face)t1_face )->psaux;
- if ( psaux && psaux->afm_parser_funcs )
- {
- error = psaux->afm_parser_funcs->init( &parser,
- stream->memory,
- stream->cursor,
- stream->limit );
-
- if ( !error )
- {
- parser.FontInfo = fi;
- parser.get_index = t1_get_index;
- parser.user_data = t1_font;
-
- error = psaux->afm_parser_funcs->parse( &parser );
- psaux->afm_parser_funcs->done( &parser );
- }
- }
-
- if ( error == T1_Err_Unknown_File_Format )
- {
- FT_Byte* start = stream->cursor;
-
-
- /* MS Windows allows versions up to 0x3FF without complaining */
- if ( stream->size > 6 &&
- start[1] < 4 &&
- FT_PEEK_ULONG_LE( start + 2 ) == stream->size )
- error = T1_Read_PFM( t1_face, stream, fi );
- }
-
- if ( !error )
- {
- t1_font->font_bbox = fi->FontBBox;
-
- t1_face->bbox.xMin = fi->FontBBox.xMin >> 16;
- t1_face->bbox.yMin = fi->FontBBox.yMin >> 16;
- /* no `U' suffix here to 0xFFFF! */
- t1_face->bbox.xMax = ( fi->FontBBox.xMax + 0xFFFF ) >> 16;
- t1_face->bbox.yMax = ( fi->FontBBox.yMax + 0xFFFF ) >> 16;
-
- /* no `U' suffix here to 0x8000! */
- t1_face->ascender = (FT_Short)( ( fi->Ascender + 0x8000 ) >> 16 );
- t1_face->descender = (FT_Short)( ( fi->Descender + 0x8000 ) >> 16 );
-
- if ( fi->NumKernPair )
- {
- t1_face->face_flags |= FT_FACE_FLAG_KERNING;
- ( (T1_Face)t1_face )->afm_data = fi;
- fi = NULL;
- }
- }
-
- FT_FRAME_EXIT();
-
- Exit:
- if ( fi != NULL )
- T1_Done_Metrics( memory, fi );
-
- return error;
- }
-
-
- /* find the kerning for a given glyph pair */
- FT_LOCAL_DEF( void )
- T1_Get_Kerning( AFM_FontInfo fi,
- FT_UInt glyph1,
- FT_UInt glyph2,
- FT_Vector* kerning )
- {
- AFM_KernPair min, mid, max;
- FT_ULong idx = KERN_INDEX( glyph1, glyph2 );
-
-
- /* simple binary search */
- min = fi->KernPairs;
- max = min + fi->NumKernPair - 1;
-
- while ( min <= max )
- {
- FT_ULong midi;
-
-
- mid = min + ( max - min ) / 2;
- midi = KERN_INDEX( mid->index1, mid->index2 );
-
- if ( midi == idx )
- {
- kerning->x = mid->x;
- kerning->y = mid->y;
-
- return;
- }
-
- if ( midi < idx )
- min = mid + 1;
- else
- max = mid - 1;
- }
-
- kerning->x = 0;
- kerning->y = 0;
- }
-
-
- FT_LOCAL_DEF( FT_Error )
- T1_Get_Track_Kerning( FT_Face face,
- FT_Fixed ptsize,
- FT_Int degree,
- FT_Fixed* kerning )
- {
- AFM_FontInfo fi = (AFM_FontInfo)( (T1_Face)face )->afm_data;
- FT_Int i;
-
-
- if ( !fi )
- return T1_Err_Invalid_Argument;
-
- for ( i = 0; i < fi->NumTrackKern; i++ )
- {
- AFM_TrackKern tk = fi->TrackKerns + i;
-
-
- if ( tk->degree != degree )
- continue;
-
- if ( ptsize < tk->min_ptsize )
- *kerning = tk->min_kern;
- else if ( ptsize > tk->max_ptsize )
- *kerning = tk->max_kern;
- else
- {
- *kerning = FT_MulDiv( ptsize - tk->min_ptsize,
- tk->max_kern - tk->min_kern,
- tk->max_ptsize - tk->min_ptsize ) +
- tk->min_kern;
- }
- }
-
- return T1_Err_Ok;
- }
-
-
-/* END */