/***************************************************************************/ | |
/* */ | |
/* ttobjs.c */ | |
/* */ | |
/* Objects manager (body). */ | |
/* */ | |
/* Copyright 1996-2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 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 */ | |
/* Compare the face with a list of well-known `tricky' fonts. */ | |
/* This list shall be expanded as we find more of them. */ | |
static FT_Bool | |
tt_check_trickyness( FT_String* name ) | |
{ | |
static const char* const trick_names[] = | |
{ | |
"DFKaiSho-SB", /* dfkaisb.ttf */ | |
"DFKaiShu", | |
"DFKai-SB", /* kaiu.ttf */ | |
"HuaTianSongTi?", /* htst3.ttf */ | |
"MingLiU", /* mingliu.ttf & mingliu.ttc */ | |
"PMingLiU", /* mingliu.ttc */ | |
"MingLi43", /* mingli.ttf */ | |
NULL | |
}; | |
int nn; | |
if ( !name ) | |
return FALSE; | |
/* 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 ( ft_strstr( name, trick_names[nn] ) ) | |
return TRUE; | |
return FALSE; | |
} | |
/*************************************************************************/ | |
/* */ | |
/* <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 = ttface->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 | |
ttface->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; | |
if ( tt_check_trickyness( ttface->family_name ) ) | |
ttface->face_flags |= FT_FACE_FLAG_TRICKY; | |
error = tt_face_load_hdmx( face, stream ); | |
if ( error ) | |
goto Exit; | |
if ( FT_IS_SCALABLE( ttface ) ) | |
{ | |
#ifdef FT_CONFIG_OPTION_INCREMENTAL | |
if ( !ttface->internal->incremental_interface ) | |
error = tt_face_load_loca( face, stream ); | |
if ( !error ) | |
error = tt_face_load_cvt( face, stream ); | |
if ( !error ) | |
error = tt_face_load_fpgm( face, stream ); | |
if ( !error ) | |
error = tt_face_load_prep( face, stream ); | |
#else | |
if ( !error ) | |
error = tt_face_load_loca( face, stream ); | |
if ( !error ) | |
error = tt_face_load_cvt( face, stream ); | |
if ( !error ) | |
error = tt_face_load_fpgm( face, stream ); | |
if ( !error ) | |
error = 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; | |
if ( !unpatented_hinting ) | |
ttface->internal->ignore_unpatented_hinter = TRUE; | |
} | |
#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; | |
FT_Stream stream; | |
SFNT_Service sfnt; | |
if ( !face ) | |
return; | |
memory = ttface->memory; | |
stream = ttface->stream; | |
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 */ |