forked from minhngoc25a/freetype2
[sfnt] Synthesize a Unicode charmap if one is missing.
* src/sfnt/ttcmap.h (tt_cmap_unicode_class_rec): Declare it. * src/sfnt/ttcmap.c (tt_get_glyph_name, tt_cmap_unicode_init, tt_cmap_unicode_done, tt_cmap_unicode_char_index, tt_cmap_unicode_char_next, tt_cmap_unicode_class_rec): Implement synthetic Unicode charmap class. (tt_get_cmap_info): Make sure the callback is available. * src/sfnt/sfobjs.c (sfnt_load_face) [FT_CONFIG_OPTION_POSTSCRIPT_NAMES]: If Unicode charmap is missing, synthesize one. * include/freetype/config/ftoption.h: Document it. * devel/ftoption.h: Ditto.
This commit is contained in:
Alexei Podtelezhnikov
parent
390048fa46
commit
75cb071b3f
18
ChangeLog
18
ChangeLog
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@ -1,3 +1,21 @@
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2017-06-21 Alexei Podtelezhnikov <apodtele@gmail.com>
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[sfnt] Synthesize a Unicode charmap if one is missing.
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* src/sfnt/ttcmap.h (tt_cmap_unicode_class_rec): Declare it.
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* src/sfnt/ttcmap.c (tt_get_glyph_name, tt_cmap_unicode_init,
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tt_cmap_unicode_done, tt_cmap_unicode_char_index,
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tt_cmap_unicode_char_next, tt_cmap_unicode_class_rec): Implement
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synthetic Unicode charmap class.
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(tt_get_cmap_info): Make sure the callback is available.
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* src/sfnt/sfobjs.c (sfnt_load_face)
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[FT_CONFIG_OPTION_POSTSCRIPT_NAMES]: If Unicode charmap is missing,
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synthesize one.
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* include/freetype/config/ftoption.h: Document it.
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* devel/ftoption.h: Ditto.
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2017-06-20 Tony Theodore <tonyt@logyst.com>
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Fix pkg-config in freetype-config for cross-compiling (#51274).
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@ -327,7 +327,7 @@ FT_BEGIN_HEADER
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/* */
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/* - The TrueType driver will provide its own set of glyph names, */
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/* if you build it to support postscript names in the TrueType */
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/* `post' table. */
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/* `post' table, but will not synthesize a missing Unicode charmap. */
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/* */
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/* - The Type 1 driver will not be able to synthesize a Unicode */
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/* charmap out of the glyphs found in the fonts. */
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@ -327,7 +327,7 @@ FT_BEGIN_HEADER
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/* */
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/* - The TrueType driver will provide its own set of glyph names, */
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/* if you build it to support postscript names in the TrueType */
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/* `post' table. */
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/* `post' table, but will not synthesize a missing Unicode charmap. */
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/* */
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/* - The Type 1 driver will not be able to synthesize a Unicode */
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/* charmap out of the glyphs found in the fonts. */
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@ -1464,7 +1464,8 @@
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/* Polish the charmaps. */
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/* */
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/* Try to set the charmap encoding according to the platform & */
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/* encoding ID of each charmap. */
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/* encoding ID of each charmap. Emulate Unicode charmap if one */
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/* is missing. */
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/* */
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tt_face_build_cmaps( face ); /* ignore errors */
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@ -1472,7 +1473,10 @@
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/* set the encoding fields */
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{
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FT_Int m;
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FT_Int m;
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#ifdef FT_CONFIG_OPTION_POSTSCRIPT_NAMES
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FT_Bool has_unicode = FALSE;
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#endif
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for ( m = 0; m < root->num_charmaps; m++ )
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@ -1482,6 +1486,33 @@
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charmap->encoding = sfnt_find_encoding( charmap->platform_id,
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charmap->encoding_id );
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#ifdef FT_CONFIG_OPTION_POSTSCRIPT_NAMES
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if ( charmap->encoding == FT_ENCODING_UNICODE )
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has_unicode = TRUE;
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}
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/* synthesize Unicode charmap if one is missing */
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if ( !has_unicode )
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{
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FT_CharMapRec cmaprec;
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cmaprec.face = root;
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cmaprec.platform_id = TT_PLATFORM_MICROSOFT;
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cmaprec.encoding_id = TT_MS_ID_UNICODE_CS;
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cmaprec.encoding = FT_ENCODING_UNICODE;
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error = FT_CMap_New( (FT_CMap_Class)&tt_cmap_unicode_class_rec,
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NULL, &cmaprec, NULL );
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if ( error &&
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FT_ERR_NEQ( error, No_Unicode_Glyph_Name ) )
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FT_TRACE2(( "sfnt_load_face: failed to emulate Unicode\n" ));
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#endif /* FT_CONFIG_OPTION_POSTSCRIPT_NAMES */
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}
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}
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@ -3622,6 +3622,110 @@
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#endif /* TT_CONFIG_CMAP_FORMAT_14 */
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/*************************************************************************/
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/*************************************************************************/
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/***** *****/
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/***** SYNTHETIC UNICODE *****/
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/***** *****/
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/*************************************************************************/
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/*************************************************************************/
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/* This charmap is generated using postscript glyph names. */
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#ifdef FT_CONFIG_OPTION_POSTSCRIPT_NAMES
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FT_CALLBACK_DEF( const char * )
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tt_get_glyph_name( TT_Face face,
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FT_UInt idx )
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{
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FT_String* PSname;
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tt_face_get_ps_name( face, idx, &PSname );
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return PSname;
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}
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FT_CALLBACK_DEF( FT_Error )
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tt_cmap_unicode_init( PS_Unicodes unicodes,
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FT_Pointer pointer )
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{
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TT_Face face = (TT_Face)FT_CMAP_FACE( unicodes );
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FT_Memory memory = FT_FACE_MEMORY( face );
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FT_Service_PsCMaps psnames = (FT_Service_PsCMaps)face->psnames;
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FT_UNUSED( pointer );
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return psnames->unicodes_init( memory,
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unicodes,
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face->root.num_glyphs,
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(PS_GetGlyphNameFunc)&tt_get_glyph_name,
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(PS_FreeGlyphNameFunc)NULL,
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(FT_Pointer)face );
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}
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FT_CALLBACK_DEF( void )
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tt_cmap_unicode_done( PS_Unicodes unicodes )
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{
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FT_Face face = FT_CMAP_FACE( unicodes );
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FT_Memory memory = FT_FACE_MEMORY( face );
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FT_FREE( unicodes->maps );
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unicodes->num_maps = 0;
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}
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FT_CALLBACK_DEF( FT_UInt )
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tt_cmap_unicode_char_index( PS_Unicodes unicodes,
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FT_UInt32 char_code )
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{
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TT_Face face = (TT_Face)FT_CMAP_FACE( unicodes );
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FT_Service_PsCMaps psnames = (FT_Service_PsCMaps)face->psnames;
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return psnames->unicodes_char_index( unicodes, char_code );
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}
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FT_CALLBACK_DEF( FT_UInt32 )
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tt_cmap_unicode_char_next( PS_Unicodes unicodes,
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FT_UInt32 *pchar_code )
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{
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TT_Face face = (TT_Face)FT_CMAP_FACE( unicodes );
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FT_Service_PsCMaps psnames = (FT_Service_PsCMaps)face->psnames;
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return psnames->unicodes_char_next( unicodes, pchar_code );
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}
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FT_DEFINE_TT_CMAP(
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tt_cmap_unicode_class_rec,
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sizeof ( PS_UnicodesRec ),
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(FT_CMap_InitFunc) tt_cmap_unicode_init, /* init */
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(FT_CMap_DoneFunc) tt_cmap_unicode_done, /* done */
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(FT_CMap_CharIndexFunc)tt_cmap_unicode_char_index, /* char_index */
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(FT_CMap_CharNextFunc) tt_cmap_unicode_char_next, /* char_next */
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(FT_CMap_CharVarIndexFunc) NULL, /* char_var_index */
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(FT_CMap_CharVarIsDefaultFunc)NULL, /* char_var_default */
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(FT_CMap_VariantListFunc) NULL, /* variant_list */
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(FT_CMap_CharVariantListFunc) NULL, /* charvariant_list */
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(FT_CMap_VariantCharListFunc) NULL, /* variantchar_list */
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-1,
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(TT_CMap_ValidateFunc)NULL, /* validate */
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(TT_CMap_Info_GetFunc)NULL /* get_cmap_info */
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)
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#endif /* FT_CONFIG_OPTION_POSTSCRIPT_NAMES */
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#ifndef FT_CONFIG_OPTION_PIC
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static const TT_CMap_Class tt_cmap_classes[] =
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@ -3801,8 +3905,10 @@
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FT_CMap cmap = (FT_CMap)charmap;
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TT_CMap_Class clazz = (TT_CMap_Class)cmap->clazz;
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return clazz->get_cmap_info( charmap, cmap_info );
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if ( clazz->get_cmap_info )
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return clazz->get_cmap_info( charmap, cmap_info );
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else
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return FT_THROW( Invalid_CharMap_Format );
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}
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@ -141,6 +141,8 @@ FT_BEGIN_HEADER
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#define TT_VALID_GLYPH_COUNT( x ) TT_VALIDATOR( x )->num_glyphs
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FT_CALLBACK_TABLE const TT_CMap_ClassRec tt_cmap_unicode_class_rec;
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FT_LOCAL( FT_Error )
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tt_face_build_cmaps( TT_Face face );
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