| /***************************************************************************/ |
| /* */ |
| /* ttobjs.c */ |
| /* */ |
| /* Objects manager (body). */ |
| /* */ |
| /* Copyright 1996-2001, 2002, 2003, 2004, 2005, 2006, 2007 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 <ft2build.h> |
| #include FT_INTERNAL_DEBUG_H |
| #include FT_INTERNAL_CALC_H |
| #include FT_INTERNAL_STREAM_H |
| #include FT_TRUETYPE_IDS_H |
| #include FT_TRUETYPE_TAGS_H |
| #include FT_INTERNAL_SFNT_H |
| |
| #include "ttgload.h" |
| #include "ttpload.h" |
| |
| #include "tterrors.h" |
| |
| #ifdef TT_USE_BYTECODE_INTERPRETER |
| #include "ttinterp.h" |
| #endif |
| |
| #ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING |
| #include FT_TRUETYPE_UNPATENTED_H |
| #endif |
| |
| #ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT |
| #include "ttgxvar.h" |
| #endif |
| |
| /*************************************************************************/ |
| /* */ |
| /* 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_ttobjs |
| |
| |
| #ifdef TT_USE_BYTECODE_INTERPRETER |
| |
| /*************************************************************************/ |
| /* */ |
| /* GLYPH ZONE FUNCTIONS */ |
| /* */ |
| /*************************************************************************/ |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* tt_glyphzone_done */ |
| /* */ |
| /* <Description> */ |
| /* Deallocate a glyph zone. */ |
| /* */ |
| /* <Input> */ |
| /* zone :: A pointer to the target glyph zone. */ |
| /* */ |
| FT_LOCAL_DEF( void ) |
| tt_glyphzone_done( TT_GlyphZone zone ) |
| { |
| FT_Memory memory = zone->memory; |
| |
| |
| if ( memory ) |
| { |
| FT_FREE( zone->contours ); |
| FT_FREE( zone->tags ); |
| FT_FREE( zone->cur ); |
| FT_FREE( zone->org ); |
| FT_FREE( zone->orus ); |
| |
| zone->max_points = zone->n_points = 0; |
| zone->max_contours = zone->n_contours = 0; |
| zone->memory = NULL; |
| } |
| } |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* tt_glyphzone_new */ |
| /* */ |
| /* <Description> */ |
| /* Allocate a new glyph zone. */ |
| /* */ |
| /* <Input> */ |
| /* memory :: A handle to the current memory object. */ |
| /* */ |
| /* maxPoints :: The capacity of glyph zone in points. */ |
| /* */ |
| /* maxContours :: The capacity of glyph zone in contours. */ |
| /* */ |
| /* <Output> */ |
| /* zone :: A pointer to the target glyph zone record. */ |
| /* */ |
| /* <Return> */ |
| /* FreeType error code. 0 means success. */ |
| /* */ |
| FT_LOCAL_DEF( FT_Error ) |
| tt_glyphzone_new( FT_Memory memory, |
| FT_UShort maxPoints, |
| FT_Short maxContours, |
| TT_GlyphZone zone ) |
| { |
| FT_Error error; |
| |
| |
| FT_MEM_ZERO( zone, sizeof ( *zone ) ); |
| zone->memory = memory; |
| |
| if ( FT_NEW_ARRAY( zone->org, maxPoints ) || |
| FT_NEW_ARRAY( zone->cur, maxPoints ) || |
| FT_NEW_ARRAY( zone->orus, maxPoints ) || |
| FT_NEW_ARRAY( zone->tags, maxPoints ) || |
| FT_NEW_ARRAY( zone->contours, maxContours ) ) |
| { |
| tt_glyphzone_done( zone ); |
| } |
| else |
| { |
| zone->max_points = maxPoints; |
| zone->max_contours = maxContours; |
| } |
| |
| return error; |
| } |
| #endif /* TT_USE_BYTECODE_INTERPRETER */ |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* tt_face_init */ |
| /* */ |
| /* <Description> */ |
| /* Initialize a given TrueType 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. */ |
| /* */ |
| FT_LOCAL_DEF( FT_Error ) |
| tt_face_init( FT_Stream stream, |
| FT_Face ttface, /* TT_Face */ |
| FT_Int face_index, |
| FT_Int num_params, |
| FT_Parameter* params ) |
| { |
| FT_Error error; |
| FT_Library library; |
| SFNT_Service sfnt; |
| TT_Face face = (TT_Face)ttface; |
| |
| |
| library = face->root.driver->root.library; |
| sfnt = (SFNT_Service)FT_Get_Module_Interface( library, "sfnt" ); |
| if ( !sfnt ) |
| goto Bad_Format; |
| |
| /* create input stream from resource */ |
| if ( FT_STREAM_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. */ |
| /* The 0x00020000 tag is completely undocumented; some fonts from */ |
| /* Arphic made for Chinese Windows 3.1 have this. */ |
| if ( face->format_tag != 0x00010000L && /* MS fonts */ |
| face->format_tag != 0x00020000L && /* CJK fonts for Win 3.1 */ |
| face->format_tag != TTAG_true ) /* Mac fonts */ |
| { |
| FT_TRACE2(( "[not a valid TTF font]\n" )); |
| goto Bad_Format; |
| } |
| |
| #ifdef TT_USE_BYTECODE_INTERPRETER |
| face->root.face_flags |= FT_FACE_FLAG_HINTER; |
| #endif |
| |
| /* If we are performing a simple font format check, exit immediately. */ |
| if ( face_index < 0 ) |
| return TT_Err_Ok; |
| |
| /* Load font directory */ |
| error = sfnt->load_face( stream, face, face_index, num_params, params ); |
| if ( error ) |
| goto Exit; |
| |
| error = tt_face_load_hdmx( face, stream ); |
| if ( error ) |
| goto Exit; |
| |
| if ( face->root.face_flags & FT_FACE_FLAG_SCALABLE ) |
| { |
| |
| #ifdef FT_CONFIG_OPTION_INCREMENTAL |
| |
| if ( !face->root.internal->incremental_interface ) |
| error = tt_face_load_loca( face, stream ); |
| if ( !error ) |
| error = tt_face_load_cvt( face, stream ) || |
| tt_face_load_fpgm( face, stream ) || |
| tt_face_load_prep( face, stream ); |
| |
| #else |
| |
| if ( !error ) |
| error = tt_face_load_loca( face, stream ) || |
| tt_face_load_cvt( face, stream ) || |
| tt_face_load_fpgm( face, stream ) || |
| tt_face_load_prep( face, stream ); |
| |
| #endif |
| |
| } |
| |
| #if defined( TT_CONFIG_OPTION_UNPATENTED_HINTING ) && \ |
| !defined( TT_CONFIG_OPTION_BYTECODE_INTERPRETER ) |
| |
| { |
| FT_Bool unpatented_hinting; |
| int i; |
| |
| |
| /* Determine whether unpatented hinting is to be used for this face. */ |
| unpatented_hinting = FT_BOOL |
| ( library->debug_hooks[FT_DEBUG_HOOK_UNPATENTED_HINTING] != NULL ); |
| |
| for ( i = 0; i < num_params && !face->unpatented_hinting; i++ ) |
| if ( params[i].tag == FT_PARAM_TAG_UNPATENTED_HINTING ) |
| unpatented_hinting = TRUE; |
| |
| /* Compare the face with a list of well-known `tricky' fonts. */ |
| /* This list shall be expanded as we find more of them. */ |
| if ( !unpatented_hinting ) |
| { |
| static const char* const trick_names[] = |
| { |
| "DFKaiSho-SB", /* dfkaisb.ttf */ |
| "DFKai-SB", /* kaiu.ttf */ |
| "HuaTianSongTi?", /* htst3.ttf */ |
| "MingLiU", /* mingliu.ttf & mingliu.ttc */ |
| "PMingLiU", /* mingliu.ttc */ |
| "MingLi43", /* mingli.ttf */ |
| NULL |
| }; |
| int nn; |
| |
| |
| /* Note that we only check the face name at the moment; it might */ |
| /* be worth to do more checks for a few special cases. */ |
| for ( nn = 0; trick_names[nn] != NULL; nn++ ) |
| { |
| if ( ttface->family_name && |
| ft_strstr( ttface->family_name, trick_names[nn] ) ) |
| { |
| unpatented_hinting = 1; |
| break; |
| } |
| } |
| } |
| |
| ttface->internal->ignore_unpatented_hinter = |
| FT_BOOL( !unpatented_hinting ); |
| } |
| |
| #endif /* TT_CONFIG_OPTION_UNPATENTED_HINTING && |
| !TT_CONFIG_OPTION_BYTECODE_INTERPRETER */ |
| |
| /* initialize standard glyph loading routines */ |
| TT_Init_Glyph_Loading( face ); |
| |
| Exit: |
| return error; |
| |
| Bad_Format: |
| error = TT_Err_Unknown_File_Format; |
| goto Exit; |
| } |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* tt_face_done */ |
| /* */ |
| /* <Description> */ |
| /* Finalize a given face object. */ |
| /* */ |
| /* <Input> */ |
| /* face :: A pointer to the face object to destroy. */ |
| /* */ |
| FT_LOCAL_DEF( void ) |
| tt_face_done( FT_Face ttface ) /* TT_Face */ |
| { |
| TT_Face face = (TT_Face)ttface; |
| FT_Memory memory = face->root.memory; |
| FT_Stream stream = face->root.stream; |
| |
| SFNT_Service sfnt = (SFNT_Service)face->sfnt; |
| |
| |
| /* for `extended TrueType formats' (i.e. compressed versions) */ |
| if ( face->extra.finalizer ) |
| face->extra.finalizer( face->extra.data ); |
| |
| if ( sfnt ) |
| sfnt->done_face( face ); |
| |
| /* freeing the locations table */ |
| tt_face_done_loca( face ); |
| |
| tt_face_free_hdmx( face ); |
| |
| /* freeing the CVT */ |
| FT_FREE( face->cvt ); |
| face->cvt_size = 0; |
| |
| /* freeing the programs */ |
| FT_FRAME_RELEASE( face->font_program ); |
| FT_FRAME_RELEASE( face->cvt_program ); |
| face->font_program_size = 0; |
| face->cvt_program_size = 0; |
| |
| #ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT |
| tt_done_blend( memory, face->blend ); |
| face->blend = NULL; |
| #endif |
| } |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* SIZE FUNCTIONS */ |
| /* */ |
| /*************************************************************************/ |
| |
| #ifdef TT_USE_BYTECODE_INTERPRETER |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* tt_size_run_fpgm */ |
| /* */ |
| /* <Description> */ |
| /* Run the font program. */ |
| /* */ |
| /* <Input> */ |
| /* size :: A handle to the size object. */ |
| /* */ |
| /* <Return> */ |
| /* FreeType error code. 0 means success. */ |
| /* */ |
| FT_LOCAL_DEF( FT_Error ) |
| tt_size_run_fpgm( TT_Size size ) |
| { |
| TT_Face face = (TT_Face)size->root.face; |
| TT_ExecContext exec; |
| FT_Error error; |
| |
| |
| /* debugging instances have their own context */ |
| if ( size->debug ) |
| exec = size->context; |
| else |
| exec = ( (TT_Driver)FT_FACE_DRIVER( face ) )->context; |
| |
| if ( !exec ) |
| return TT_Err_Could_Not_Find_Context; |
| |
| TT_Load_Context( exec, face, size ); |
| |
| exec->callTop = 0; |
| exec->top = 0; |
| |
| exec->period = 64; |
| exec->phase = 0; |
| exec->threshold = 0; |
| |
| exec->instruction_trap = FALSE; |
| exec->F_dot_P = 0x10000L; |
| |
| { |
| FT_Size_Metrics* metrics = &exec->metrics; |
| TT_Size_Metrics* tt_metrics = &exec->tt_metrics; |
| |
| |
| metrics->x_ppem = 0; |
| metrics->y_ppem = 0; |
| metrics->x_scale = 0; |
| metrics->y_scale = 0; |
| |
| tt_metrics->ppem = 0; |
| tt_metrics->scale = 0; |
| tt_metrics->ratio = 0x10000L; |
| } |
| |
| /* allow font program execution */ |
| TT_Set_CodeRange( exec, |
| tt_coderange_font, |
| face->font_program, |
| face->font_program_size ); |
| |
| /* disable CVT and glyph programs coderange */ |
| TT_Clear_CodeRange( exec, tt_coderange_cvt ); |
| TT_Clear_CodeRange( exec, tt_coderange_glyph ); |
| |
| if ( face->font_program_size > 0 ) |
| { |
| error = TT_Goto_CodeRange( exec, tt_coderange_font, 0 ); |
| |
| if ( !error ) |
| error = face->interpreter( exec ); |
| } |
| else |
| error = TT_Err_Ok; |
| |
| if ( !error ) |
| TT_Save_Context( exec, size ); |
| |
| return error; |
| } |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* tt_size_run_prep */ |
| /* */ |
| /* <Description> */ |
| /* Run the control value program. */ |
| /* */ |
| /* <Input> */ |
| /* size :: A handle to the size object. */ |
| /* */ |
| /* <Return> */ |
| /* FreeType error code. 0 means success. */ |
| /* */ |
| FT_LOCAL_DEF( FT_Error ) |
| tt_size_run_prep( TT_Size size ) |
| { |
| TT_Face face = (TT_Face)size->root.face; |
| TT_ExecContext exec; |
| FT_Error error; |
| |
| |
| /* debugging instances have their own context */ |
| if ( size->debug ) |
| exec = size->context; |
| else |
| exec = ( (TT_Driver)FT_FACE_DRIVER( face ) )->context; |
| |
| if ( !exec ) |
| return TT_Err_Could_Not_Find_Context; |
| |
| TT_Load_Context( exec, face, size ); |
| |
| exec->callTop = 0; |
| exec->top = 0; |
| |
| exec->instruction_trap = FALSE; |
| |
| TT_Set_CodeRange( exec, |
| tt_coderange_cvt, |
| face->cvt_program, |
| face->cvt_program_size ); |
| |
| TT_Clear_CodeRange( exec, tt_coderange_glyph ); |
| |
| if ( face->cvt_program_size > 0 ) |
| { |
| error = TT_Goto_CodeRange( exec, tt_coderange_cvt, 0 ); |
| |
| if ( !error && !size->debug ) |
| error = face->interpreter( exec ); |
| } |
| else |
| error = TT_Err_Ok; |
| |
| /* save as default graphics state */ |
| size->GS = exec->GS; |
| |
| TT_Save_Context( exec, size ); |
| |
| return error; |
| } |
| |
| #endif /* TT_USE_BYTECODE_INTERPRETER */ |
| |
| |
| #ifdef TT_USE_BYTECODE_INTERPRETER |
| |
| static void |
| tt_size_done_bytecode( FT_Size ftsize ) |
| { |
| TT_Size size = (TT_Size)ftsize; |
| TT_Face face = (TT_Face)ftsize->face; |
| FT_Memory memory = face->root.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_glyphzone_done( &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; |
| |
| size->bytecode_ready = 0; |
| size->cvt_ready = 0; |
| } |
| |
| |
| /* Initialize bytecode-related fields in the size object. */ |
| /* We do this only if bytecode interpretation is really needed. */ |
| static FT_Error |
| tt_size_init_bytecode( FT_Size ftsize ) |
| { |
| FT_Error error; |
| TT_Size size = (TT_Size)ftsize; |
| TT_Face face = (TT_Face)ftsize->face; |
| FT_Memory memory = face->root.memory; |
| FT_Int i; |
| |
| FT_UShort n_twilight; |
| TT_MaxProfile* maxp = &face->max_profile; |
| |
| |
| size->bytecode_ready = 1; |
| size->cvt_ready = 0; |
| |
| size->max_function_defs = maxp->maxFunctionDefs; |
| size->max_instruction_defs = maxp->maxInstructionDefs; |
| |
| size->num_function_defs = 0; |
| size->num_instruction_defs = 0; |
| |
| size->max_func = 0; |
| size->max_ins = 0; |
| |
| size->cvt_size = face->cvt_size; |
| size->storage_size = maxp->maxStorage; |
| |
| /* Set default metrics */ |
| { |
| FT_Size_Metrics* metrics = &size->metrics; |
| TT_Size_Metrics* metrics2 = &size->ttmetrics; |
| |
| metrics->x_ppem = 0; |
| metrics->y_ppem = 0; |
| |
| metrics2->rotated = FALSE; |
| metrics2->stretched = FALSE; |
| |
| /* set default compensation (all 0) */ |
| for ( i = 0; i < 4; i++ ) |
| metrics2->compensations[i] = 0; |
| } |
| |
| /* allocate function defs, instruction defs, cvt, and storage area */ |
| if ( FT_NEW_ARRAY( size->function_defs, size->max_function_defs ) || |
| FT_NEW_ARRAY( size->instruction_defs, size->max_instruction_defs ) || |
| FT_NEW_ARRAY( size->cvt, size->cvt_size ) || |
| FT_NEW_ARRAY( size->storage, size->storage_size ) ) |
| goto Exit; |
| |
| /* reserve twilight zone */ |
| n_twilight = maxp->maxTwilightPoints; |
| |
| /* there are 4 phantom points (do we need this?) */ |
| n_twilight += 4; |
| |
| error = tt_glyphzone_new( memory, n_twilight, 0, &size->twilight ); |
| if ( error ) |
| goto Exit; |
| |
| size->twilight.n_points = n_twilight; |
| |
| size->GS = tt_default_graphics_state; |
| |
| /* set `face->interpreter' according to the debug hook present */ |
| { |
| FT_Library library = face->root.driver->root.library; |
| |
| |
| face->interpreter = (TT_Interpreter) |
| library->debug_hooks[FT_DEBUG_HOOK_TRUETYPE]; |
| if ( !face->interpreter ) |
| face->interpreter = (TT_Interpreter)TT_RunIns; |
| } |
| |
| /* Fine, now run the font program! */ |
| error = tt_size_run_fpgm( size ); |
| |
| Exit: |
| if ( error ) |
| tt_size_done_bytecode( ftsize ); |
| |
| return error; |
| } |
| |
| |
| FT_LOCAL_DEF( FT_Error ) |
| tt_size_ready_bytecode( TT_Size size ) |
| { |
| FT_Error error = TT_Err_Ok; |
| |
| |
| if ( !size->bytecode_ready ) |
| { |
| error = tt_size_init_bytecode( (FT_Size)size ); |
| if ( error ) |
| goto Exit; |
| } |
| |
| /* rescale CVT when needed */ |
| if ( !size->cvt_ready ) |
| { |
| FT_UInt i; |
| TT_Face face = (TT_Face) size->root.face; |
| |
| |
| /* 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 ( i = 0; i < (FT_UInt)size->twilight.n_points; i++ ) |
| { |
| size->twilight.org[i].x = 0; |
| size->twilight.org[i].y = 0; |
| size->twilight.cur[i].x = 0; |
| size->twilight.cur[i].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; |
| |
| error = tt_size_run_prep( size ); |
| if ( !error ) |
| size->cvt_ready = 1; |
| } |
| Exit: |
| return error; |
| } |
| |
| #endif /* TT_USE_BYTECODE_INTERPRETER */ |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* tt_size_init */ |
| /* */ |
| /* <Description> */ |
| /* Initialize a new TrueType size object. */ |
| /* */ |
| /* <InOut> */ |
| /* size :: A handle to the size object. */ |
| /* */ |
| /* <Return> */ |
| /* FreeType error code. 0 means success. */ |
| /* */ |
| FT_LOCAL_DEF( FT_Error ) |
| tt_size_init( FT_Size ttsize ) /* TT_Size */ |
| { |
| TT_Size size = (TT_Size)ttsize; |
| FT_Error error = TT_Err_Ok; |
| |
| #ifdef TT_USE_BYTECODE_INTERPRETER |
| size->bytecode_ready = 0; |
| size->cvt_ready = 0; |
| #endif |
| |
| size->ttmetrics.valid = FALSE; |
| size->strike_index = 0xFFFFFFFFUL; |
| |
| return error; |
| } |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <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( FT_Size ttsize ) /* TT_Size */ |
| { |
| TT_Size size = (TT_Size)ttsize; |
| |
| |
| #ifdef TT_USE_BYTECODE_INTERPRETER |
| if ( size->bytecode_ready ) |
| tt_size_done_bytecode( ttsize ); |
| #endif |
| |
| size->ttmetrics.valid = FALSE; |
| } |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* tt_size_reset */ |
| /* */ |
| /* <Description> */ |
| /* Reset 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 ) |
| { |
| TT_Face face; |
| FT_Error error = TT_Err_Ok; |
| FT_Size_Metrics* metrics; |
| |
| |
| size->ttmetrics.valid = FALSE; |
| |
| face = (TT_Face)size->root.face; |
| |
| metrics = &size->metrics; |
| |
| /* copy the result from base layer */ |
| *metrics = size->root.metrics; |
| |
| if ( metrics->x_ppem < 1 || metrics->y_ppem < 1 ) |
| return TT_Err_Invalid_PPem; |
| |
| /* This bit flag, if set, indicates that the ppems must be */ |
| /* rounded to integers. Nearly all TrueType fonts have this bit */ |
| /* set, as hinting won't work really well otherwise. */ |
| /* */ |
| if ( face->header.Flags & 8 ) |
| { |
| metrics->x_scale = FT_DivFix( metrics->x_ppem << 6, |
| face->root.units_per_EM ); |
| metrics->y_scale = FT_DivFix( metrics->y_ppem << 6, |
| face->root.units_per_EM ); |
| |
| metrics->ascender = |
| FT_PIX_ROUND( FT_MulFix( face->root.ascender, metrics->y_scale ) ); |
| metrics->descender = |
| FT_PIX_ROUND( FT_MulFix( face->root.descender, metrics->y_scale ) ); |
| metrics->height = |
| FT_PIX_ROUND( FT_MulFix( face->root.height, metrics->y_scale ) ); |
| metrics->max_advance = |
| FT_PIX_ROUND( FT_MulFix( face->root.max_advance_width, |
| metrics->x_scale ) ); |
| } |
| |
| /* 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; |
| } |
| |
| #ifdef TT_USE_BYTECODE_INTERPRETER |
| size->cvt_ready = 0; |
| #endif /* TT_USE_BYTECODE_INTERPRETER */ |
| |
| if ( !error ) |
| size->ttmetrics.valid = TRUE; |
| |
| return error; |
| } |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* tt_driver_init */ |
| /* */ |
| /* <Description> */ |
| /* Initialize 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( FT_Module ttdriver ) /* TT_Driver */ |
| { |
| |
| #ifdef TT_USE_BYTECODE_INTERPRETER |
| |
| TT_Driver driver = (TT_Driver)ttdriver; |
| |
| |
| if ( !TT_New_Context( driver ) ) |
| return TT_Err_Could_Not_Find_Context; |
| |
| #else |
| |
| FT_UNUSED( ttdriver ); |
| |
| #endif |
| |
| return TT_Err_Ok; |
| } |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* tt_driver_done */ |
| /* */ |
| /* <Description> */ |
| /* Finalize a given TrueType driver. */ |
| /* */ |
| /* <Input> */ |
| /* driver :: A handle to the target TrueType driver. */ |
| /* */ |
| FT_LOCAL_DEF( void ) |
| tt_driver_done( FT_Module ttdriver ) /* TT_Driver */ |
| { |
| #ifdef TT_USE_BYTECODE_INTERPRETER |
| TT_Driver driver = (TT_Driver)ttdriver; |
| |
| |
| /* destroy the execution context */ |
| if ( driver->context ) |
| { |
| TT_Done_Context( driver->context ); |
| driver->context = NULL; |
| } |
| #else |
| FT_UNUSED( ttdriver ); |
| #endif |
| |
| } |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* tt_slot_init */ |
| /* */ |
| /* <Description> */ |
| /* Initialize a new slot object. */ |
| /* */ |
| /* <InOut> */ |
| /* slot :: A handle to the slot object. */ |
| /* */ |
| /* <Return> */ |
| /* FreeType error code. 0 means success. */ |
| /* */ |
| FT_LOCAL_DEF( FT_Error ) |
| tt_slot_init( FT_GlyphSlot slot ) |
| { |
| return FT_GlyphLoader_CreateExtra( slot->internal->loader ); |
| } |
| |
| |
| /* END */ |
