Commit 75cb071b3fbfa2315c5d458fee2bb465a14568ae
2017-06-21T22:52:37
[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.
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diff --git a/ChangeLog b/ChangeLog
index bc65cbb..3c95165 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,21 @@
+2017-06-21 Alexei Podtelezhnikov <apodtele@gmail.com>
+
+ [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.
+
2017-06-20 Tony Theodore <tonyt@logyst.com>
Fix pkg-config in freetype-config for cross-compiling (#51274).
diff --git a/devel/ftoption.h b/devel/ftoption.h
index db661e7..a690ea2 100644
--- a/devel/ftoption.h
+++ b/devel/ftoption.h
@@ -327,7 +327,7 @@ FT_BEGIN_HEADER
/* */
/* - The TrueType driver will provide its own set of glyph names, */
/* if you build it to support postscript names in the TrueType */
- /* `post' table. */
+ /* `post' table, but will not synthesize a missing Unicode charmap. */
/* */
/* - The Type 1 driver will not be able to synthesize a Unicode */
/* charmap out of the glyphs found in the fonts. */
diff --git a/include/freetype/config/ftoption.h b/include/freetype/config/ftoption.h
index 1bf6e8f..935e20d 100644
--- a/include/freetype/config/ftoption.h
+++ b/include/freetype/config/ftoption.h
@@ -327,7 +327,7 @@ FT_BEGIN_HEADER
/* */
/* - The TrueType driver will provide its own set of glyph names, */
/* if you build it to support postscript names in the TrueType */
- /* `post' table. */
+ /* `post' table, but will not synthesize a missing Unicode charmap. */
/* */
/* - The Type 1 driver will not be able to synthesize a Unicode */
/* charmap out of the glyphs found in the fonts. */
diff --git a/src/sfnt/sfobjs.c b/src/sfnt/sfobjs.c
index 3f54d5d..04303e9 100644
--- a/src/sfnt/sfobjs.c
+++ b/src/sfnt/sfobjs.c
@@ -1464,7 +1464,8 @@
/* Polish the charmaps. */
/* */
/* Try to set the charmap encoding according to the platform & */
- /* encoding ID of each charmap. */
+ /* encoding ID of each charmap. Emulate Unicode charmap if one */
+ /* is missing. */
/* */
tt_face_build_cmaps( face ); /* ignore errors */
@@ -1472,7 +1473,10 @@
/* set the encoding fields */
{
- FT_Int m;
+ FT_Int m;
+#ifdef FT_CONFIG_OPTION_POSTSCRIPT_NAMES
+ FT_Bool has_unicode = FALSE;
+#endif
for ( m = 0; m < root->num_charmaps; m++ )
@@ -1482,6 +1486,33 @@
charmap->encoding = sfnt_find_encoding( charmap->platform_id,
charmap->encoding_id );
+
+#ifdef FT_CONFIG_OPTION_POSTSCRIPT_NAMES
+
+ if ( charmap->encoding == FT_ENCODING_UNICODE )
+ has_unicode = TRUE;
+ }
+
+ /* synthesize Unicode charmap if one is missing */
+ if ( !has_unicode )
+ {
+ FT_CharMapRec cmaprec;
+
+
+ cmaprec.face = root;
+ cmaprec.platform_id = TT_PLATFORM_MICROSOFT;
+ cmaprec.encoding_id = TT_MS_ID_UNICODE_CS;
+ cmaprec.encoding = FT_ENCODING_UNICODE;
+
+
+ error = FT_CMap_New( (FT_CMap_Class)&tt_cmap_unicode_class_rec,
+ NULL, &cmaprec, NULL );
+ if ( error &&
+ FT_ERR_NEQ( error, No_Unicode_Glyph_Name ) )
+ FT_TRACE2(( "sfnt_load_face: failed to emulate Unicode\n" ));
+
+#endif /* FT_CONFIG_OPTION_POSTSCRIPT_NAMES */
+
}
}
diff --git a/src/sfnt/ttcmap.c b/src/sfnt/ttcmap.c
index 5afa6ae..ec583d1 100644
--- a/src/sfnt/ttcmap.c
+++ b/src/sfnt/ttcmap.c
@@ -3622,6 +3622,110 @@
#endif /* TT_CONFIG_CMAP_FORMAT_14 */
+ /*************************************************************************/
+ /*************************************************************************/
+ /***** *****/
+ /***** SYNTHETIC UNICODE *****/
+ /***** *****/
+ /*************************************************************************/
+ /*************************************************************************/
+
+ /* This charmap is generated using postscript glyph names. */
+
+#ifdef FT_CONFIG_OPTION_POSTSCRIPT_NAMES
+
+ FT_CALLBACK_DEF( const char * )
+ tt_get_glyph_name( TT_Face face,
+ FT_UInt idx )
+ {
+ FT_String* PSname;
+
+
+ tt_face_get_ps_name( face, idx, &PSname );
+
+ return PSname;
+ }
+
+
+ FT_CALLBACK_DEF( FT_Error )
+ tt_cmap_unicode_init( PS_Unicodes unicodes,
+ FT_Pointer pointer )
+ {
+ TT_Face face = (TT_Face)FT_CMAP_FACE( unicodes );
+ FT_Memory memory = FT_FACE_MEMORY( face );
+ FT_Service_PsCMaps psnames = (FT_Service_PsCMaps)face->psnames;
+
+ FT_UNUSED( pointer );
+
+
+ return psnames->unicodes_init( memory,
+ unicodes,
+ face->root.num_glyphs,
+ (PS_GetGlyphNameFunc)&tt_get_glyph_name,
+ (PS_FreeGlyphNameFunc)NULL,
+ (FT_Pointer)face );
+ }
+
+
+ FT_CALLBACK_DEF( void )
+ tt_cmap_unicode_done( PS_Unicodes unicodes )
+ {
+ FT_Face face = FT_CMAP_FACE( unicodes );
+ FT_Memory memory = FT_FACE_MEMORY( face );
+
+
+ FT_FREE( unicodes->maps );
+ unicodes->num_maps = 0;
+ }
+
+
+ FT_CALLBACK_DEF( FT_UInt )
+ tt_cmap_unicode_char_index( PS_Unicodes unicodes,
+ FT_UInt32 char_code )
+ {
+ TT_Face face = (TT_Face)FT_CMAP_FACE( unicodes );
+ FT_Service_PsCMaps psnames = (FT_Service_PsCMaps)face->psnames;
+
+
+ return psnames->unicodes_char_index( unicodes, char_code );
+ }
+
+
+ FT_CALLBACK_DEF( FT_UInt32 )
+ tt_cmap_unicode_char_next( PS_Unicodes unicodes,
+ FT_UInt32 *pchar_code )
+ {
+ TT_Face face = (TT_Face)FT_CMAP_FACE( unicodes );
+ FT_Service_PsCMaps psnames = (FT_Service_PsCMaps)face->psnames;
+
+
+ return psnames->unicodes_char_next( unicodes, pchar_code );
+ }
+
+
+ FT_DEFINE_TT_CMAP(
+ tt_cmap_unicode_class_rec,
+
+ sizeof ( PS_UnicodesRec ),
+
+ (FT_CMap_InitFunc) tt_cmap_unicode_init, /* init */
+ (FT_CMap_DoneFunc) tt_cmap_unicode_done, /* done */
+ (FT_CMap_CharIndexFunc)tt_cmap_unicode_char_index, /* char_index */
+ (FT_CMap_CharNextFunc) tt_cmap_unicode_char_next, /* char_next */
+
+ (FT_CMap_CharVarIndexFunc) NULL, /* char_var_index */
+ (FT_CMap_CharVarIsDefaultFunc)NULL, /* char_var_default */
+ (FT_CMap_VariantListFunc) NULL, /* variant_list */
+ (FT_CMap_CharVariantListFunc) NULL, /* charvariant_list */
+ (FT_CMap_VariantCharListFunc) NULL, /* variantchar_list */
+
+ -1,
+ (TT_CMap_ValidateFunc)NULL, /* validate */
+ (TT_CMap_Info_GetFunc)NULL /* get_cmap_info */
+ )
+
+#endif /* FT_CONFIG_OPTION_POSTSCRIPT_NAMES */
+
#ifndef FT_CONFIG_OPTION_PIC
static const TT_CMap_Class tt_cmap_classes[] =
@@ -3801,8 +3905,10 @@
FT_CMap cmap = (FT_CMap)charmap;
TT_CMap_Class clazz = (TT_CMap_Class)cmap->clazz;
-
- return clazz->get_cmap_info( charmap, cmap_info );
+ if ( clazz->get_cmap_info )
+ return clazz->get_cmap_info( charmap, cmap_info );
+ else
+ return FT_THROW( Invalid_CharMap_Format );
}
diff --git a/src/sfnt/ttcmap.h b/src/sfnt/ttcmap.h
index 83f12df..ab02f9b 100644
--- a/src/sfnt/ttcmap.h
+++ b/src/sfnt/ttcmap.h
@@ -141,6 +141,8 @@ FT_BEGIN_HEADER
#define TT_VALID_GLYPH_COUNT( x ) TT_VALIDATOR( x )->num_glyphs
+ FT_CALLBACK_TABLE const TT_CMap_ClassRec tt_cmap_unicode_class_rec;
+
FT_LOCAL( FT_Error )
tt_face_build_cmaps( TT_Face face );