9a966b7d1b
* devel/ftoption.h, include/freetype/config/ftoption.h (TT_CONFIG_CMAP_FORMAT_14): New macro. * include/freetype/internal/ftobjs.h (FT_CMap_CharVarIndexFunc, FT_CMap_CharVarIsDefaultFunc, FT_CMap_VariantListFunc, FT_CMap_CharVariantListFunc, FT_CMap_VariantCharListFunc): New support function prototypes. (FT_CMap_ClassRec): Add them. Update all users. * include/freetype/ttnameid.h (TT_APPLE_ID_VARIANT_SELECTOR): New macro. * include/freetype/freetype.h (FT_Get_Char_Variant_Index, FT_Get_Char_Variant_IsDefault, FT_Get_Variant_Selectors, FT_Get_Variants_Of_Char, FT_Get_Chars_Of_Variant): New API functions. * src/base/ftobjs.c (find_variant_selector_charmap): New auxiliary function. (FT_Set_Charmap): Disallow cmaps of type 14. (FT_Get_Char_Variant_Index, FT_Get_Char_Variant_IsDefault, FT_Get_Variant_Selectors, FT_Get_Variants_Of_Char, FT_Get_Chars_Of_Variant): New API functions. * src/sfnt/ttcmap.c (TT_PEEK_UINT24, TT_NEXT_UINT24): New macros. (TT_CMap14Rec, tt_cmap14_init, tt_cmap14_validate, tt_cmap14_char_index, tt_cmap14_char_next, tt_cmap14_get_info, tt_cmap14_char_map_def_binary, tt_cmap14_char_map_nondef_binary, tt_cmap14_find_variant, tt_cmap14_char_var_index, tt_cmap14_char_var_isdefault, tt_cmap14_variants, tt_cmap14_char_variants, tt_cmap14_def_char_count, tt_cmap14_get_def_chars, tt_cmap14_get_nondef_chars, tt_cmap14_variant_chars, tt_cmap14_class_rec): New functions and structures for cmap 14 support. (tt_cmap_classes): Register tt_cmap14_class_rec. (tt_face_build_cmaps): One more error message. * docs/CHANGES: Mention cmap 14 support.
168 lines
4.1 KiB
C
168 lines
4.1 KiB
C
/***************************************************************************/
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/* */
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/* pfrcmap.c */
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/* */
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/* FreeType PFR cmap handling (body). */
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/* */
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/* Copyright 2002, 2007 by */
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/* David Turner, Robert Wilhelm, and Werner Lemberg. */
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/* */
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/* This file is part of the FreeType project, and may only be used, */
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/* modified, and distributed under the terms of the FreeType project */
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/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
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/* this file you indicate that you have read the license and */
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/* understand and accept it fully. */
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/* */
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/***************************************************************************/
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#include "pfrcmap.h"
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#include "pfrobjs.h"
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#include FT_INTERNAL_DEBUG_H
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#include "pfrerror.h"
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FT_CALLBACK_DEF( FT_Error )
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pfr_cmap_init( PFR_CMap cmap )
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{
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FT_Error error = PFR_Err_Ok;
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PFR_Face face = (PFR_Face)FT_CMAP_FACE( cmap );
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cmap->num_chars = face->phy_font.num_chars;
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cmap->chars = face->phy_font.chars;
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/* just for safety, check that the character entries are correctly */
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/* sorted in increasing character code order */
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{
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FT_UInt n;
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for ( n = 1; n < cmap->num_chars; n++ )
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{
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if ( cmap->chars[n - 1].char_code >= cmap->chars[n].char_code )
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{
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error = PFR_Err_Invalid_Table;
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goto Exit;
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}
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}
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}
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Exit:
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return error;
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}
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FT_CALLBACK_DEF( void )
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pfr_cmap_done( PFR_CMap cmap )
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{
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cmap->chars = NULL;
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cmap->num_chars = 0;
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}
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FT_CALLBACK_DEF( FT_UInt )
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pfr_cmap_char_index( PFR_CMap cmap,
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FT_UInt32 char_code )
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{
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FT_UInt min = 0;
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FT_UInt max = cmap->num_chars;
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FT_UInt mid;
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PFR_Char gchar;
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while ( min < max )
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{
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mid = min + ( max - min ) / 2;
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gchar = cmap->chars + mid;
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if ( gchar->char_code == char_code )
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return mid + 1;
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if ( gchar->char_code < char_code )
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min = mid + 1;
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else
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max = mid;
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}
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return 0;
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}
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FT_CALLBACK_DEF( FT_UInt )
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pfr_cmap_char_next( PFR_CMap cmap,
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FT_UInt32 *pchar_code )
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{
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FT_UInt result = 0;
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FT_UInt32 char_code = *pchar_code + 1;
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Restart:
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{
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FT_UInt min = 0;
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FT_UInt max = cmap->num_chars;
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FT_UInt mid;
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PFR_Char gchar;
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while ( min < max )
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{
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mid = min + ( ( max - min ) >> 1 );
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gchar = cmap->chars + mid;
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if ( gchar->char_code == char_code )
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{
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result = mid;
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if ( result != 0 )
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{
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result++;
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goto Exit;
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}
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char_code++;
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goto Restart;
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}
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if ( gchar->char_code < char_code )
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min = mid+1;
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else
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max = mid;
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}
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/* we didn't find it, but we have a pair just above it */
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char_code = 0;
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if ( min < cmap->num_chars )
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{
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gchar = cmap->chars + min;
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result = min;
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if ( result != 0 )
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{
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result++;
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char_code = gchar->char_code;
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}
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}
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}
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Exit:
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*pchar_code = char_code;
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return result;
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}
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FT_CALLBACK_TABLE_DEF const FT_CMap_ClassRec
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pfr_cmap_class_rec =
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{
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sizeof ( PFR_CMapRec ),
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(FT_CMap_InitFunc) pfr_cmap_init,
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(FT_CMap_DoneFunc) pfr_cmap_done,
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(FT_CMap_CharIndexFunc)pfr_cmap_char_index,
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(FT_CMap_CharNextFunc) pfr_cmap_char_next,
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NULL, NULL, NULL, NULL, NULL
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};
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/* END */
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