kc3-lang/freetype/src/cff/t2objs.c
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Hash : 5b401bb9
Author :
Date : 2000-05-29T23:03:15
additional changes to the CFF/Type2 driver
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src/cff/t2objs.c
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/***************************************************************************/ /* */ /* ttobjs.c */ /* */ /* Objects manager (body). */ /* */ /* Copyright 1996-1999 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 <t2errors.h> /* required by tracing mode */ #undef FT_COMPONENT #define FT_COMPONENT trace_ttobjs /*************************************************************************/ /* */ /* GLYPH ZONE FUNCTIONS */ /* */ /*************************************************************************/ /*************************************************************************/ /* */ /* <Function> */ /* T2_Init_Face */ /* */ /* <Description> */ /* Initializes a given TrueType face object. */ /* */ /* <Input> */ /* resource :: The source font resource. */ /* face_index :: The index of the font face in the resource. */ /* face :: The newly built face object. */ /* */ /* <Return> */ /* TrueType 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 ) { TT_Error error; FT_Driver sfnt_driver; SFNT_Interface* sfnt; sfnt_driver = FT_Get_Driver( face->root.driver->library, "sfnt" ); if (!sfnt_driver) goto Bad_Format; sfnt = (SFNT_Interface*)(sfnt_driver->interface.format_interface); if (!sfnt) goto Bad_Format; /* create input stream from resource */ if ( FILE_Seek(0) ) goto Exit; /* check that we have a valid TrueType file */ error = sfnt->init_face( stream, face, face_index, num_params, params ); if (error) goto Exit; /* We must also be able to accept Mac/GX fonts, as well as OT ones */ if ( face->format_tag != 0x4f54544f ) /* OpenType/CFF font */ { FT_TRACE2(( "[not a valid OpenType/CFF font]" )); goto Bad_Format; } /* If we're performing a simple font format check, exit immediately */ if ( face_index < 0 ) return FT_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; if ( ALLOC( cff, sizeof(*cff) ) ) goto Exit; face->other = cff; error = T2_Load_CFF_Font( stream, face_index, cff ); } 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; #if 0 FT_Stream stream = face->root.stream; #endif SFNT_Interface* sfnt = face->sfnt; if (sfnt) sfnt->done_face(face); { CFF_Font* cff = (CFF_Font*)face->other; if (cff) { T2_Done_CFF_Font(cff); FREE(face->other); } } } /*************************************************************************/ /* */ /* SIZE FUNCTIONS */ /* */ /*************************************************************************/ /*************************************************************************/ /* */ /* <Function> */ /* T2_Init_Size */ /* */ /* <Description> */ /* Initializes a new OpenType size object. */ /* */ /* <InOut> */ /* size :: A handle to the size object. */ /* */ /* <Return> */ /* TrueType error code. 0 means success. */ /* */ LOCAL_DEF FT_Error T2_Init_Size( T2_Size size ) { UNUSED(size); return 0; } /*************************************************************************/ /* */ /* <Function> */ /* T2_Done_Size */ /* */ /* <Description> */ /* The OpenType size object finalizer. */ /* */ /* <Input> */ /* size :: A handle to the target size object. */ /* */ LOCAL_FUNC void T2_Done_Size( T2_Size size ) { UNUSED(size); } /*************************************************************************/ /* */ /* <Function> */ /* T2_Reset_Size */ /* */ /* <Description> */ /* Resets a OpenType size when resolutions and character dimensions */ /* have been changed. */ /* */ /* <Input> */ /* size :: A handle to the target size object. */ /* */ LOCAL_DEF FT_Error T2_Reset_Size( T2_Size size ) { T2_Face face = (T2_Face)size->face; FT_Size_Metrics* metrics = &size->metrics; FT_Error error = FT_Err_Ok; if ( metrics->x_ppem < 1 || metrics->y_ppem < 1 ) return FT_Err_Invalid_Argument; /* Compute root ascender, descender, test height, and max_advance */ metrics->ascender = ( FT_MulFix( face->root.ascender, metrics->y_scale ) + 32 ) & -64; metrics->descender = ( FT_MulFix( face->root.descender, metrics->y_scale ) + 32 ) & -64; metrics->height = ( FT_MulFix( face->root.height, metrics->y_scale ) + 32 ) & -64; metrics->max_advance = ( FT_MulFix( face->root.max_advance_width, metrics->x_scale ) + 32 ) & -64; return error; } /*************************************************************************/ /* */ /* <Function> */ /* T2_Init_GlyphSlot */ /* */ /* <Description> */ /* The OpenType glyph slot initializer. */ /* */ /* <Input> */ /* slot :: The glyph record to build. */ /* */ /* <Output> */ /* TrueType error code. 0 means success. */ /* */ LOCAL_FUNC FT_Error T2_Init_GlyphSlot( T2_GlyphSlot slot ) { /* allocate the outline space */ FT_Face face = slot->face; FT_Library library = face->driver->library; FT_TRACE4(( "TT.Init_GlyphSlot: Creating outline maxp = %d, maxc = %d\n", face->max_points, face->max_contours )); return FT_Outline_New( library, face->max_points + 2, face->max_contours, &slot->outline ); } /*************************************************************************/ /* */ /* <Function> */ /* TT_Done_GlyphSlot */ /* */ /* <Description> */ /* The OpenType glyph slot finalizer. */ /* */ /* <Input> */ /* slot :: A handle to the glyph slot object. */ /* */ LOCAL_FUNC void T2_Done_GlyphSlot( T2_GlyphSlot slot ) { FT_Library library = slot->face->driver->library; FT_Memory memory = library->memory; if (slot->flags & ft_glyph_own_bitmap) FREE( slot->bitmap.buffer ); FT_Outline_Done( library, &slot->outline ); return; } /*************************************************************************/ /* */ /* <Function> */ /* T2_Init_Driver */ /* */ /* <Description> */ /* Initializes a given OpenType driver object. */ /* */ /* <Input> */ /* driver :: A handle to the target driver object. */ /* */ /* <Return> */ /* TrueType error code. 0 means success. */ /* */ LOCAL_FUNC FT_Error T2_Init_Driver( T2_Driver driver ) { FT_Memory memory = driver->root.memory; FT_Error error; error = FT_New_GlyphZone( memory, 0, 0, &driver->zone ); if (error) return error; /* init extension registry if needed */ #ifdef T2_CONFIG_OPTION_EXTEND_ENGINE return TT_Init_Extensions( driver ); #else return FT_Err_Ok; #endif } /*************************************************************************/ /* */ /* <Function> */ /* TT_Done_Driver */ /* */ /* <Description> */ /* Finalizes a given TrueType driver. */ /* */ /* <Input> */ /* driver :: A handle to the target TrueType driver. */ /* */ LOCAL_FUNC void T2_Done_Driver( T2_Driver driver ) { /* destroy extensions registry if needed */ #ifdef T2_CONFIG_OPTION_EXTEND_ENGINE TT_Done_Extensions( driver ); #endif /* remove the loading glyph zone */ FT_Done_GlyphZone( &driver->zone ); } /* END */