| /***************************************************************************/ |
| /* */ |
| /* otlayout.c */ |
| /* */ |
| /* OpenType based layout engine(body). */ |
| /* */ |
| /* Copyright 2003 by */ |
| /* Masatake YAMATO and Redhat K.K. */ |
| /* */ |
| /* This file 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. */ |
| /* */ |
| /***************************************************************************/ |
| |
| /***************************************************************************/ |
| /* Development of the code in this file is support of */ |
| /* Information-technology Promotion Agency, Japan. */ |
| /***************************************************************************/ |
| |
| /* |
| * Experimental: No support for gpos now. |
| */ |
| |
| #include <ft2build.h> |
| #include FT_LIST_H |
| #include FT_OTLAYOUT_H |
| |
| #include "otltypes.h" |
| #include "ot-types.h" |
| #include "ot-ruleset.h" |
| #include "ot-info.h" |
| #include "oterrors.h" |
| |
| FT_LOCAL_DEF ( FT_Error ) |
| otl_get_font ( FT_Face face, FTL_Font * font) |
| { |
| *font = ((OT_Face)face)->extra.data; |
| |
| if ( *font ) |
| return FT_Err_Ok; |
| else |
| return OT_Err_Invalid_Face_Handle; |
| } |
| |
| FT_LOCAL_DEF ( FTL_EngineType ) |
| otl_get_engine_type ( FT_Face face ) |
| { |
| return FTL_OPENTYPE_ENGINE; |
| } |
| |
| FT_LOCAL ( FT_Error ) |
| otl_new_features_request( FT_Face face, FTL_FeaturesRequest * ftl_request) |
| { |
| FT_Error error; |
| FT_Memory memory = FT_FACE_MEMORY(face); |
| OTL_Font font; |
| OTL_FeaturesRequest request; |
| |
| if (( error = otl_get_font ( face, (FTL_Font*)&font ) )) |
| goto Exit; |
| |
| if ( FT_NEW(request) ) |
| goto Exit; |
| |
| request->ruleset = ot_ruleset_new ( font->info ); |
| if ( !request->ruleset ) |
| { |
| error = OT_Err_Invalid_Argument; /* ??? */ |
| goto Failure; |
| } |
| |
| if (( error = FTL_FeaturesRequest_Init ( face, (FTL_FeaturesRequest)request ) )) |
| goto Failure; |
| *ftl_request = (FTL_FeaturesRequest)request; |
| Exit: |
| return error; |
| Failure: |
| if ( request->ruleset ) |
| ot_ruleset_delete( request->ruleset ); |
| FT_FREE( request ); |
| return error; |
| } |
| |
| FT_LOCAL ( FT_Error ) |
| otl_done_features_request( FTL_FeaturesRequest request) |
| { |
| FT_Error error; |
| FTL_Font font; |
| FT_Face face; |
| FT_Memory memory; |
| |
| FT_ASSERT( request ); |
| font = FTL_FEATURES_REQUEST_FONT ( request ); |
| |
| FT_ASSERT( font ); |
| face = FTL_FONT_FACE(font); |
| |
| if ( !face ) |
| return OT_Err_Invalid_Argument; |
| memory = FT_FACE_MEMORY( face ); |
| ot_ruleset_delete ( ((OTL_FeaturesRequest)request)->ruleset ); |
| error = FTL_FeaturesRequest_Finalize ( request ); |
| FT_FREE( request ); /* broken */ |
| return error; |
| } |
| |
| FT_LOCAL ( FT_Error ) |
| otl_copy_features_request( FTL_FeaturesRequest from, |
| FTL_FeaturesRequest to) |
| { |
| FT_Error error; |
| ot_ruleset_copy(((OTL_FeaturesRequest)from)->ruleset, ((OTL_FeaturesRequest)to)->ruleset); |
| error = FTL_FeaturesRequest_Copy( from, to ); |
| return error; |
| } |
| |
| FT_LOCAL ( FT_Error ) |
| otl_substitute_glyphs ( FT_Face face, |
| FTL_FeaturesRequest request, |
| FTL_GlyphArray in, |
| FTL_GlyphArray out ) |
| { |
| FT_Error error = FT_Err_Ok; |
| if (( error = FTL_Copy_Glyphs_Array ( in, out ) )) |
| return error; |
| ot_ruleset_shape ( ((OTL_FeaturesRequest)request)->ruleset, out ); |
| return FT_Err_Ok; |
| } |
| |
| FT_EXPORT( FT_Bool ) |
| OTL_FeaturesRequest_Find_Script ( OTL_FeaturesRequest request, |
| OTTableType table_type, |
| OTTag script_tag, |
| FT_UInt *script_index) |
| { |
| OTL_Font font = (OTL_Font)FTL_FEATURES_REQUEST_FONT( request ); |
| return ot_info_find_script ( font->info, |
| table_type, |
| script_tag, |
| script_index ) |
| ? 1: 0; |
| |
| } |
| |
| FT_EXPORT( FT_Bool ) |
| OTL_FeaturesRequest_Find_Language ( OTL_FeaturesRequest request, |
| OTTableType table_type, |
| FT_UInt script_index, |
| OTTag language_tag, |
| FT_UInt *language_index, |
| FT_UInt *required_feature_index ) |
| { |
| OTL_Font font = (OTL_Font)FTL_FEATURES_REQUEST_FONT( request ); |
| return ot_info_find_language ( font->info, |
| table_type, |
| script_index, |
| language_tag, |
| language_index, |
| required_feature_index ) |
| ? 1: 0; |
| } |
| |
| FT_EXPORT ( FT_Bool ) |
| OTL_FeaturesRequest_Find_Feature ( OTL_FeaturesRequest request, |
| OTTableType table_type, |
| OTTag feature_tag, |
| FT_UInt script_index, |
| FT_UInt language_index, |
| FT_UInt *feature_index ) |
| { |
| OTL_Font font = (OTL_Font)FTL_FEATURES_REQUEST_FONT( request ); |
| return ot_info_find_feature ( font->info, |
| table_type, |
| feature_tag, |
| script_index, |
| language_index, |
| feature_index ) |
| ? 1: 0; |
| } |
| |
| FT_EXPORT ( OTL_Tag_List ) |
| OTL_FeaturesRequest_List_Scripts ( OTL_FeaturesRequest request, |
| OTTableType table_type ) |
| { |
| FT_Error error; |
| OTL_Font font = (OTL_Font)FTL_FEATURES_REQUEST_FONT( request ); |
| FT_Face face = FTL_FONT_FACE(font); |
| FT_Memory memory = FT_FACE_MEMORY(face); |
| OTL_Tag_List tag_list; |
| if ( FT_NEW(tag_list) ) |
| return NULL; |
| |
| tag_list->request = request; |
| tag_list->tags = ot_info_list_scripts( font->info, table_type ); |
| return tag_list; |
| } |
| |
| FT_EXPORT ( OTL_Tag_List ) |
| OTL_FeaturesRequest_List_Languages ( OTL_FeaturesRequest request, |
| OTTableType table_type, |
| FT_UInt script_index ) |
| { |
| FT_Error error; |
| OTL_Font font = (OTL_Font)FTL_FEATURES_REQUEST_FONT( request ); |
| FT_Face face = FTL_FONT_FACE( font ); |
| FT_Memory memory = FT_FACE_MEMORY( face ); |
| OTL_Tag_List tag_list; |
| if ( FT_NEW(tag_list) ) |
| return NULL; |
| |
| tag_list->request = request; |
| tag_list->tags = ot_info_list_languages( font->info, |
| table_type, |
| script_index, |
| 0 ); |
| return tag_list; |
| } |
| |
| FT_EXPORT ( OTL_Tag_List ) |
| OTL_FeaturesRequest_List_Features ( OTL_FeaturesRequest request, |
| OTTableType table_type, |
| FT_UInt script_index, |
| FT_UInt language_index ) |
| { |
| FT_Error error; |
| OTL_Font font = (OTL_Font)FTL_FEATURES_REQUEST_FONT( request ); |
| FT_Face face = FTL_FONT_FACE(font); |
| FT_Memory memory = FT_FACE_MEMORY( face ); |
| OTL_Tag_List tag_list; |
| if ( FT_NEW(tag_list) ) |
| return NULL; |
| |
| tag_list->request = request; |
| tag_list->tags = ot_info_list_features( font->info, |
| table_type, |
| 0, |
| script_index, |
| language_index ); |
| return tag_list; |
| } |
| |
| FT_EXPORT ( FT_Error ) |
| OTL_Tag_List_Done ( OTL_Tag_List taglist ) |
| { |
| FTL_FeaturesRequest request = (FTL_FeaturesRequest)taglist->request; |
| FTL_Font font = FTL_FEATURES_REQUEST_FONT( request ); |
| FT_Face face = FTL_FONT_FACE(font); |
| FT_Memory memory = FT_FACE_MEMORY( face ); |
| FT_FREE ( taglist ); |
| return FT_Err_Ok; |
| } |
| |
| FT_EXPORT ( FT_Error ) |
| OTL_FeaturesRequest_Add_Feature ( OTL_FeaturesRequest request, |
| OTTableType table_type, |
| FT_UInt feature_index, |
| FT_ULong property_bit) |
| { |
| ot_ruleset_add_feature( request->ruleset, |
| table_type, |
| feature_index, |
| property_bit ); |
| return FT_Err_Ok; |
| } |
| |
| /* END */ |
