| /***************************************************************************/ |
| /* */ |
| /* t2objs.c */ |
| /* */ |
| /* OpenType objects manager (body). */ |
| /* */ |
| /* Copyright 1996-2000 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 <freetype/internal/ftdebug.h> |
| #include <freetype/internal/ftcalc.h> |
| #include <freetype/internal/ftstream.h> |
| #include <freetype/ttnameid.h> |
| #include <freetype/tttags.h> |
| |
| #include <freetype/internal/sfnt.h> |
| #include <freetype/internal/psnames.h> |
| #include <t2objs.h> |
| |
| #include <t2load.h> |
| #include <freetype/internal/t2errors.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_t2objs |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* FACE FUNCTIONS */ |
| /* */ |
| /*************************************************************************/ |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* T2_Init_Face */ |
| /* */ |
| /* <Description> */ |
| /* Initializes a given OpenType face object. */ |
| /* */ |
| /* <Input> */ |
| /* stream :: The source font stream. */ |
| /* */ |
| /* face_index :: The index of the font face in the resource. */ |
| /* */ |
| /* num_params :: Number of additional generic parameters. Ignored. */ |
| /* */ |
| /* params :: Additional generic parameters. Ignored. */ |
| /* */ |
| /* <InOut> */ |
| /* face :: The newly built face object. */ |
| /* */ |
| /* <Return> */ |
| /* FreeType error code. 0 means success. */ |
| /* */ |
| LOCAL_DEF |
| FT_Error T2_Init_Face( FT_Stream stream, |
| T2_Face face, |
| FT_Int face_index, |
| FT_Int num_params, |
| FT_Parameter* params ) |
| { |
| FT_Error error; |
| SFNT_Interface* sfnt; |
| |
| |
| sfnt = (SFNT_Interface*)FT_Get_Module_Interface( |
| face->root.driver->root.library, "sfnt" ); |
| if ( !sfnt ) |
| goto Bad_Format; |
| |
| /* create input stream from resource */ |
| if ( FILE_Seek( 0 ) ) |
| goto Exit; |
| |
| /* check that we have a valid OpenType file */ |
| error = sfnt->init_face( stream, face, face_index, num_params, params ); |
| if ( error ) |
| goto Exit; |
| |
| if ( face->format_tag != 0x4F54544FL ) /* `OTTO'; OpenType/CFF font */ |
| { |
| FT_TRACE2(( "[not a valid OpenType/CFF font]\n" )); |
| goto Bad_Format; |
| } |
| |
| /* If we are performing a simple font format check, exit immediately */ |
| if ( face_index < 0 ) |
| return T2_Err_Ok; |
| |
| /* Load font directory */ |
| error = sfnt->load_face( stream, face, face_index, num_params, params ); |
| if ( error ) |
| goto Exit; |
| |
| /* now, load the CFF part of the file */ |
| error = face->goto_table( face, TTAG_CFF, stream, 0 ); |
| if ( error ) |
| goto Exit; |
| |
| { |
| CFF_Font* cff; |
| FT_Memory memory = face->root.memory; |
| FT_Face root; |
| |
| |
| if ( ALLOC( cff, sizeof ( *cff ) ) ) |
| goto Exit; |
| |
| face->extra.data = cff; |
| error = T2_Load_CFF_Font( stream, face_index, cff ); |
| if ( error ) |
| goto Exit; |
| |
| /* Complement the root flags with some interesting information. */ |
| /* Note that for OpenType/CFF, there is no need to do this, but */ |
| /* this will be necessary for pure CFF fonts through. */ |
| root = &face->root; |
| } |
| |
| Exit: |
| return error; |
| |
| Bad_Format: |
| error = FT_Err_Unknown_File_Format; |
| goto Exit; |
| } |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* T2_Done_Face */ |
| /* */ |
| /* <Description> */ |
| /* Finalizes a given face object. */ |
| /* */ |
| /* <Input> */ |
| /* face :: A pointer to the face object to destroy. */ |
| /* */ |
| LOCAL_DEF |
| void T2_Done_Face( T2_Face face ) |
| { |
| FT_Memory memory = face->root.memory; |
| SFNT_Interface* sfnt = face->sfnt; |
| |
| |
| if ( sfnt ) |
| sfnt->done_face( face ); |
| |
| { |
| CFF_Font* cff = (CFF_Font*)face->extra.data; |
| |
| |
| if ( cff ) |
| { |
| T2_Done_CFF_Font( cff ); |
| FREE( face->extra.data ); |
| } |
| } |
| } |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* T2_Init_Driver */ |
| /* */ |
| /* <Description> */ |
| /* Initializes a given OpenType driver object. */ |
| /* */ |
| /* <Input> */ |
| /* driver :: A handle to the target driver object. */ |
| /* */ |
| /* <Return> */ |
| /* FreeType error code. 0 means success. */ |
| /* */ |
| LOCAL_FUNC |
| FT_Error T2_Init_Driver( T2_Driver driver ) |
| { |
| /* init extension registry if needed */ |
| |
| #ifdef TT_CONFIG_OPTION_EXTEND_ENGINE |
| |
| return TT_Init_Extensions( driver ); |
| |
| #else |
| |
| FT_UNUSED( driver ); |
| |
| return T2_Err_Ok; |
| |
| #endif |
| } |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* T2_Done_Driver */ |
| /* */ |
| /* <Description> */ |
| /* Finalizes a given OpenType driver. */ |
| /* */ |
| /* <Input> */ |
| /* driver :: A handle to the target OpenType driver. */ |
| /* */ |
| LOCAL_FUNC |
| void T2_Done_Driver( T2_Driver driver ) |
| { |
| /* destroy extensions registry if needed */ |
| |
| #ifdef TT_CONFIG_OPTION_EXTEND_ENGINE |
| |
| TT_Done_Extensions( driver ); |
| |
| #else |
| |
| FT_UNUSED( driver ); |
| |
| #endif |
| } |
| |
| |
| /* END */ |