?? ttobjs.c
字號(hào):
TT_Done_Context( exec );#endif /* TT_CONFIG_OPTION_BYTECODE_INTERPRETER */ size->ttmetrics.valid = FALSE; return error;#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER Fail_Exec: if ( !size->debug ) TT_Done_Context( exec ); Fail_Memory: TT_Size_Done( size ); return error;#endif /* TT_CONFIG_OPTION_BYTECODE_INTERPRETER */ } /*************************************************************************/ /* */ /* <Function> */ /* TT_Size_Done */ /* */ /* <Description> */ /* The TrueType size object finalizer. */ /* */ /* <Input> */ /* size :: A handle to the target size object. */ /* */ FT_LOCAL_DEF( void ) TT_Size_Done( TT_Size size ) {#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER FT_Memory memory = size->root.face->memory; if ( size->debug ) { /* the debug context must be deleted by the debugger itself */ size->context = NULL; size->debug = FALSE; } FT_FREE( size->cvt ); size->cvt_size = 0; /* free storage area */ FT_FREE( size->storage ); size->storage_size = 0; /* twilight zone */ TT_Done_GlyphZone( &size->twilight ); FT_FREE( size->function_defs ); FT_FREE( size->instruction_defs ); size->num_function_defs = 0; size->max_function_defs = 0; size->num_instruction_defs = 0; size->max_instruction_defs = 0; size->max_func = 0; size->max_ins = 0;#endif size->ttmetrics.valid = FALSE; } /*************************************************************************/ /* */ /* <Function> */ /* Reset_Outline_Size */ /* */ /* <Description> */ /* Resets a TrueType outline size when resolutions and character */ /* dimensions have been changed. */ /* */ /* <Input> */ /* size :: A handle to the target size object. */ /* */ static FT_Error Reset_Outline_Size( TT_Size size ) { TT_Face face; FT_Error error = TT_Err_Ok; FT_Size_Metrics* metrics; if ( size->ttmetrics.valid ) return TT_Err_Ok; face = (TT_Face)size->root.face; metrics = &size->root.metrics; if ( metrics->x_ppem < 1 || metrics->y_ppem < 1 ) return TT_Err_Invalid_PPem; /* compute new transformation */ if ( metrics->x_ppem >= metrics->y_ppem ) { size->ttmetrics.scale = metrics->x_scale; size->ttmetrics.ppem = metrics->x_ppem; size->ttmetrics.x_ratio = 0x10000L; size->ttmetrics.y_ratio = FT_MulDiv( metrics->y_ppem, 0x10000L, metrics->x_ppem ); } else { size->ttmetrics.scale = metrics->y_scale; size->ttmetrics.ppem = metrics->y_ppem; size->ttmetrics.x_ratio = FT_MulDiv( metrics->x_ppem, 0x10000L, metrics->y_ppem ); size->ttmetrics.y_ratio = 0x10000L; } /* 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;#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS /* set to `invalid' by default */ size->strike_index = 0xFFFFU;#endif#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER { TT_ExecContext exec; FT_UInt i, j; /* Scale the cvt values to the new ppem. */ /* We use by default the y ppem to scale the CVT. */ for ( i = 0; i < size->cvt_size; i++ ) size->cvt[i] = FT_MulFix( face->cvt[i], size->ttmetrics.scale ); /* All twilight points are originally zero */ for ( j = 0; j < (FT_UInt)size->twilight.n_points; j++ ) { size->twilight.org[j].x = 0; size->twilight.org[j].y = 0; size->twilight.cur[j].x = 0; size->twilight.cur[j].y = 0; } /* clear storage area */ for ( i = 0; i < (FT_UInt)size->storage_size; i++ ) size->storage[i] = 0; size->GS = tt_default_graphics_state; /* get execution context and run prep program */ if ( size->debug ) exec = size->context; else exec = TT_New_Context( face ); /* debugging instances have their own context */ if ( !exec ) return TT_Err_Could_Not_Find_Context; TT_Load_Context( exec, face, size ); TT_Set_CodeRange( exec, tt_coderange_cvt, face->cvt_program, face->cvt_program_size ); TT_Clear_CodeRange( exec, tt_coderange_glyph ); exec->instruction_trap = FALSE; exec->top = 0; exec->callTop = 0; if ( face->cvt_program_size > 0 ) { error = TT_Goto_CodeRange( exec, tt_coderange_cvt, 0 ); if ( error ) goto End; if ( !size->debug ) error = face->interpreter( exec ); } else error = TT_Err_Ok; size->GS = exec->GS; /* save default graphics state */ End: TT_Save_Context( exec, size ); if ( !size->debug ) TT_Done_Context( exec ); /* debugging instances keep their context */ }#endif /* TT_CONFIG_OPTION_BYTECODE_INTERPRETER */ if ( !error ) size->ttmetrics.valid = TRUE; return error; }#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS /*************************************************************************/ /* */ /* <Function> */ /* Reset_SBit_Size */ /* */ /* <Description> */ /* Resets a TrueType sbit size when resolutions and character */ /* dimensions have been changed. */ /* */ /* <Input> */ /* size :: A handle to the target size object. */ /* */ static FT_Error Reset_SBit_Size( TT_Size size ) { TT_Face face; FT_Error error = TT_Err_Ok; FT_ULong strike_index; FT_Size_Metrics* metrics; FT_Size_Metrics* sbit_metrics; SFNT_Service sfnt; metrics = &size->root.metrics; if ( size->strike_index != 0xFFFFU ) return TT_Err_Ok; face = (TT_Face)size->root.face; sfnt = (SFNT_Service)face->sfnt; sbit_metrics = &size->strike_metrics; error = sfnt->set_sbit_strike(face, metrics->x_ppem, metrics->y_ppem, &strike_index); if ( !error ) { TT_SBit_Strike strike = face->sbit_strikes + strike_index; sbit_metrics->x_ppem = metrics->x_ppem; sbit_metrics->y_ppem = metrics->y_ppem;#if 0 /* * sbit_metrics->?_scale * are not used now. */ sbit_metrics->x_scale = 1 << 16; sbit_metrics->y_scale = 1 << 16;#endif sbit_metrics->ascender = strike->hori.ascender << 6; sbit_metrics->descender = strike->hori.descender << 6; /* XXX: Is this correct? */ sbit_metrics->height = sbit_metrics->ascender - sbit_metrics->descender; /* XXX: Is this correct? */ sbit_metrics->max_advance = ( strike->hori.min_origin_SB + strike->hori.max_width + strike->hori.min_advance_SB ) << 6; size->strike_index = strike_index; } else { size->strike_index = 0xFFFFU; sbit_metrics->x_ppem = 0; sbit_metrics->y_ppem = 0; sbit_metrics->ascender = 0; sbit_metrics->descender = 0; sbit_metrics->height = 0; sbit_metrics->max_advance = 0; } return error; }#endif /* TT_CONFIG_OPTION_EMBEDDED_BITMAPS */ /*************************************************************************/ /* */ /* <Function> */ /* TT_Size_Reset */ /* */ /* <Description> */ /* Resets a TrueType size when resolutions and character dimensions */ /* have been changed. */ /* */ /* <Input> */ /* size :: A handle to the target size object. */ /* */ FT_LOCAL_DEF( FT_Error ) TT_Size_Reset( TT_Size size ) { FT_Face face; FT_Error error = TT_Err_Ok; face = size->root.face; if ( face->face_flags & FT_FACE_FLAG_SCALABLE ) { if ( !size->ttmetrics.valid ) error = Reset_Outline_Size( size ); if ( error ) return error; }#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS if ( face->face_flags & FT_FACE_FLAG_FIXED_SIZES ) { if ( size->strike_index == 0xFFFFU ) error = Reset_SBit_Size( size ); if ( !error && !( face->face_flags & FT_FACE_FLAG_SCALABLE ) ) size->root.metrics = size->strike_metrics; }#endif /* TT_CONFIG_OPTION_EMBEDDED_BITMAPS */ if ( face->face_flags & FT_FACE_FLAG_SCALABLE ) return TT_Err_Ok; else return error; } /*************************************************************************/ /* */ /* <Function> */ /* TT_Driver_Init */ /* */ /* <Description> */ /* Initializes a given TrueType driver object. */ /* */ /* <Input> */ /* driver :: A handle to the target driver object. */ /* */ /* <Return> */ /* FreeType error code. 0 means success. */ /* */ FT_LOCAL_DEF( FT_Error ) TT_Driver_Init( TT_Driver driver ) { FT_Error error; /* set `extra' in glyph loader */ error = FT_GlyphLoader_CreateExtra( FT_DRIVER( driver )->glyph_loader ); return error; } /*************************************************************************/ /* */ /* <Function> */ /* TT_Driver_Done */ /* */ /* <Description> */ /* Finalizes a given TrueType driver. */ /* */ /* <Input> */ /* driver :: A handle to the target TrueType driver. */ /* */ FT_LOCAL_DEF( void ) TT_Driver_Done( TT_Driver driver ) {#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER /* destroy the execution context */ if ( driver->context ) { TT_Destroy_Context( driver->context, driver->root.root.memory ); driver->context = NULL; }#else FT_UNUSED( driver );#endif }/* END */?? 快捷鍵說(shuō)明
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