0,0 → 1,517 |
/***************************************************************************/ |
/* */ |
/* t1gload.c */ |
/* */ |
/* Type 1 Glyph Loader (body). */ |
/* */ |
/* Copyright 1996-2006, 2008-2010, 2013 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. */ |
/* */ |
/***************************************************************************/ |
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#include <ft2build.h> |
#include "t1gload.h" |
#include FT_INTERNAL_CALC_H |
#include FT_INTERNAL_DEBUG_H |
#include FT_INTERNAL_STREAM_H |
#include FT_OUTLINE_H |
#include FT_INTERNAL_POSTSCRIPT_AUX_H |
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#include "t1errors.h" |
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/*************************************************************************/ |
/* */ |
/* 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_t1gload |
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/*************************************************************************/ |
/*************************************************************************/ |
/*************************************************************************/ |
/********** *********/ |
/********** COMPUTE THE MAXIMUM ADVANCE WIDTH *********/ |
/********** *********/ |
/********** The following code is in charge of computing *********/ |
/********** the maximum advance width of the font. It *********/ |
/********** quickly processes each glyph charstring to *********/ |
/********** extract the value from either a `sbw' or `seac' *********/ |
/********** operator. *********/ |
/********** *********/ |
/*************************************************************************/ |
/*************************************************************************/ |
/*************************************************************************/ |
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FT_LOCAL_DEF( FT_Error ) |
T1_Parse_Glyph_And_Get_Char_String( T1_Decoder decoder, |
FT_UInt glyph_index, |
FT_Data* char_string ) |
{ |
T1_Face face = (T1_Face)decoder->builder.face; |
T1_Font type1 = &face->type1; |
FT_Error error = FT_Err_Ok; |
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#ifdef FT_CONFIG_OPTION_INCREMENTAL |
FT_Incremental_InterfaceRec *inc = |
face->root.internal->incremental_interface; |
#endif |
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decoder->font_matrix = type1->font_matrix; |
decoder->font_offset = type1->font_offset; |
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#ifdef FT_CONFIG_OPTION_INCREMENTAL |
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/* For incremental fonts get the character data using the */ |
/* callback function. */ |
if ( inc ) |
error = inc->funcs->get_glyph_data( inc->object, |
glyph_index, char_string ); |
else |
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#endif /* FT_CONFIG_OPTION_INCREMENTAL */ |
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/* For ordinary fonts get the character data stored in the face record. */ |
{ |
char_string->pointer = type1->charstrings[glyph_index]; |
char_string->length = (FT_Int)type1->charstrings_len[glyph_index]; |
} |
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if ( !error ) |
error = decoder->funcs.parse_charstrings( |
decoder, (FT_Byte*)char_string->pointer, |
char_string->length ); |
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#ifdef FT_CONFIG_OPTION_INCREMENTAL |
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/* Incremental fonts can optionally override the metrics. */ |
if ( !error && inc && inc->funcs->get_glyph_metrics ) |
{ |
FT_Incremental_MetricsRec metrics; |
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metrics.bearing_x = FIXED_TO_INT( decoder->builder.left_bearing.x ); |
metrics.bearing_y = 0; |
metrics.advance = FIXED_TO_INT( decoder->builder.advance.x ); |
metrics.advance_v = FIXED_TO_INT( decoder->builder.advance.y ); |
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error = inc->funcs->get_glyph_metrics( inc->object, |
glyph_index, FALSE, &metrics ); |
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decoder->builder.left_bearing.x = INT_TO_FIXED( metrics.bearing_x ); |
decoder->builder.advance.x = INT_TO_FIXED( metrics.advance ); |
decoder->builder.advance.y = INT_TO_FIXED( metrics.advance_v ); |
} |
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#endif /* FT_CONFIG_OPTION_INCREMENTAL */ |
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return error; |
} |
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FT_CALLBACK_DEF( FT_Error ) |
T1_Parse_Glyph( T1_Decoder decoder, |
FT_UInt glyph_index ) |
{ |
FT_Data glyph_data; |
FT_Error error = T1_Parse_Glyph_And_Get_Char_String( |
decoder, glyph_index, &glyph_data ); |
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#ifdef FT_CONFIG_OPTION_INCREMENTAL |
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if ( !error ) |
{ |
T1_Face face = (T1_Face)decoder->builder.face; |
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if ( face->root.internal->incremental_interface ) |
face->root.internal->incremental_interface->funcs->free_glyph_data( |
face->root.internal->incremental_interface->object, |
&glyph_data ); |
} |
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#endif /* FT_CONFIG_OPTION_INCREMENTAL */ |
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return error; |
} |
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FT_LOCAL_DEF( FT_Error ) |
T1_Compute_Max_Advance( T1_Face face, |
FT_Pos* max_advance ) |
{ |
FT_Error error; |
T1_DecoderRec decoder; |
FT_Int glyph_index; |
T1_Font type1 = &face->type1; |
PSAux_Service psaux = (PSAux_Service)face->psaux; |
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FT_ASSERT( ( face->len_buildchar == 0 ) == ( face->buildchar == NULL ) ); |
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*max_advance = 0; |
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/* initialize load decoder */ |
error = psaux->t1_decoder_funcs->init( &decoder, |
(FT_Face)face, |
0, /* size */ |
0, /* glyph slot */ |
(FT_Byte**)type1->glyph_names, |
face->blend, |
0, |
FT_RENDER_MODE_NORMAL, |
T1_Parse_Glyph ); |
if ( error ) |
return error; |
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decoder.builder.metrics_only = 1; |
decoder.builder.load_points = 0; |
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decoder.num_subrs = type1->num_subrs; |
decoder.subrs = type1->subrs; |
decoder.subrs_len = type1->subrs_len; |
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decoder.buildchar = face->buildchar; |
decoder.len_buildchar = face->len_buildchar; |
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*max_advance = 0; |
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/* for each glyph, parse the glyph charstring and extract */ |
/* the advance width */ |
for ( glyph_index = 0; glyph_index < type1->num_glyphs; glyph_index++ ) |
{ |
/* now get load the unscaled outline */ |
error = T1_Parse_Glyph( &decoder, glyph_index ); |
if ( glyph_index == 0 || decoder.builder.advance.x > *max_advance ) |
*max_advance = decoder.builder.advance.x; |
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/* ignore the error if one occurred - skip to next glyph */ |
} |
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psaux->t1_decoder_funcs->done( &decoder ); |
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return FT_Err_Ok; |
} |
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FT_LOCAL_DEF( FT_Error ) |
T1_Get_Advances( FT_Face t1face, /* T1_Face */ |
FT_UInt first, |
FT_UInt count, |
FT_Int32 load_flags, |
FT_Fixed* advances ) |
{ |
T1_Face face = (T1_Face)t1face; |
T1_DecoderRec decoder; |
T1_Font type1 = &face->type1; |
PSAux_Service psaux = (PSAux_Service)face->psaux; |
FT_UInt nn; |
FT_Error error; |
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if ( load_flags & FT_LOAD_VERTICAL_LAYOUT ) |
{ |
for ( nn = 0; nn < count; nn++ ) |
advances[nn] = 0; |
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return FT_Err_Ok; |
} |
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error = psaux->t1_decoder_funcs->init( &decoder, |
(FT_Face)face, |
0, /* size */ |
0, /* glyph slot */ |
(FT_Byte**)type1->glyph_names, |
face->blend, |
0, |
FT_RENDER_MODE_NORMAL, |
T1_Parse_Glyph ); |
if ( error ) |
return error; |
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decoder.builder.metrics_only = 1; |
decoder.builder.load_points = 0; |
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decoder.num_subrs = type1->num_subrs; |
decoder.subrs = type1->subrs; |
decoder.subrs_len = type1->subrs_len; |
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decoder.buildchar = face->buildchar; |
decoder.len_buildchar = face->len_buildchar; |
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for ( nn = 0; nn < count; nn++ ) |
{ |
error = T1_Parse_Glyph( &decoder, first + nn ); |
if ( !error ) |
advances[nn] = FIXED_TO_INT( decoder.builder.advance.x ); |
else |
advances[nn] = 0; |
} |
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return FT_Err_Ok; |
} |
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FT_LOCAL_DEF( FT_Error ) |
T1_Load_Glyph( FT_GlyphSlot t1glyph, /* T1_GlyphSlot */ |
FT_Size t1size, /* T1_Size */ |
FT_UInt glyph_index, |
FT_Int32 load_flags ) |
{ |
T1_GlyphSlot glyph = (T1_GlyphSlot)t1glyph; |
FT_Error error; |
T1_DecoderRec decoder; |
T1_Face face = (T1_Face)t1glyph->face; |
FT_Bool hinting; |
T1_Font type1 = &face->type1; |
PSAux_Service psaux = (PSAux_Service)face->psaux; |
const T1_Decoder_Funcs decoder_funcs = psaux->t1_decoder_funcs; |
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FT_Matrix font_matrix; |
FT_Vector font_offset; |
FT_Data glyph_data; |
FT_Bool must_finish_decoder = FALSE; |
#ifdef FT_CONFIG_OPTION_INCREMENTAL |
FT_Bool glyph_data_loaded = 0; |
#endif |
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#ifdef FT_CONFIG_OPTION_INCREMENTAL |
if ( glyph_index >= (FT_UInt)face->root.num_glyphs && |
!face->root.internal->incremental_interface ) |
#else |
if ( glyph_index >= (FT_UInt)face->root.num_glyphs ) |
#endif /* FT_CONFIG_OPTION_INCREMENTAL */ |
{ |
error = FT_THROW( Invalid_Argument ); |
goto Exit; |
} |
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FT_ASSERT( ( face->len_buildchar == 0 ) == ( face->buildchar == NULL ) ); |
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if ( load_flags & FT_LOAD_NO_RECURSE ) |
load_flags |= FT_LOAD_NO_SCALE | FT_LOAD_NO_HINTING; |
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if ( t1size ) |
{ |
glyph->x_scale = t1size->metrics.x_scale; |
glyph->y_scale = t1size->metrics.y_scale; |
} |
else |
{ |
glyph->x_scale = 0x10000L; |
glyph->y_scale = 0x10000L; |
} |
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t1glyph->outline.n_points = 0; |
t1glyph->outline.n_contours = 0; |
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hinting = FT_BOOL( ( load_flags & FT_LOAD_NO_SCALE ) == 0 && |
( load_flags & FT_LOAD_NO_HINTING ) == 0 ); |
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t1glyph->format = FT_GLYPH_FORMAT_OUTLINE; |
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error = decoder_funcs->init( &decoder, |
t1glyph->face, |
t1size, |
t1glyph, |
(FT_Byte**)type1->glyph_names, |
face->blend, |
FT_BOOL( hinting ), |
FT_LOAD_TARGET_MODE( load_flags ), |
T1_Parse_Glyph ); |
if ( error ) |
goto Exit; |
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must_finish_decoder = TRUE; |
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decoder.builder.no_recurse = FT_BOOL( |
( load_flags & FT_LOAD_NO_RECURSE ) != 0 ); |
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decoder.num_subrs = type1->num_subrs; |
decoder.subrs = type1->subrs; |
decoder.subrs_len = type1->subrs_len; |
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decoder.buildchar = face->buildchar; |
decoder.len_buildchar = face->len_buildchar; |
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/* now load the unscaled outline */ |
error = T1_Parse_Glyph_And_Get_Char_String( &decoder, glyph_index, |
&glyph_data ); |
if ( error ) |
goto Exit; |
#ifdef FT_CONFIG_OPTION_INCREMENTAL |
glyph_data_loaded = 1; |
#endif |
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font_matrix = decoder.font_matrix; |
font_offset = decoder.font_offset; |
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/* save new glyph tables */ |
decoder_funcs->done( &decoder ); |
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must_finish_decoder = FALSE; |
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/* now, set the metrics -- this is rather simple, as */ |
/* the left side bearing is the xMin, and the top side */ |
/* bearing the yMax */ |
if ( !error ) |
{ |
t1glyph->outline.flags &= FT_OUTLINE_OWNER; |
t1glyph->outline.flags |= FT_OUTLINE_REVERSE_FILL; |
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/* for composite glyphs, return only left side bearing and */ |
/* advance width */ |
if ( load_flags & FT_LOAD_NO_RECURSE ) |
{ |
FT_Slot_Internal internal = t1glyph->internal; |
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t1glyph->metrics.horiBearingX = |
FIXED_TO_INT( decoder.builder.left_bearing.x ); |
t1glyph->metrics.horiAdvance = |
FIXED_TO_INT( decoder.builder.advance.x ); |
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internal->glyph_matrix = font_matrix; |
internal->glyph_delta = font_offset; |
internal->glyph_transformed = 1; |
} |
else |
{ |
FT_BBox cbox; |
FT_Glyph_Metrics* metrics = &t1glyph->metrics; |
FT_Vector advance; |
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/* copy the _unscaled_ advance width */ |
metrics->horiAdvance = |
FIXED_TO_INT( decoder.builder.advance.x ); |
t1glyph->linearHoriAdvance = |
FIXED_TO_INT( decoder.builder.advance.x ); |
t1glyph->internal->glyph_transformed = 0; |
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if ( load_flags & FT_LOAD_VERTICAL_LAYOUT ) |
{ |
/* make up vertical ones */ |
metrics->vertAdvance = ( face->type1.font_bbox.yMax - |
face->type1.font_bbox.yMin ) >> 16; |
t1glyph->linearVertAdvance = metrics->vertAdvance; |
} |
else |
{ |
metrics->vertAdvance = |
FIXED_TO_INT( decoder.builder.advance.y ); |
t1glyph->linearVertAdvance = |
FIXED_TO_INT( decoder.builder.advance.y ); |
} |
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t1glyph->format = FT_GLYPH_FORMAT_OUTLINE; |
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if ( t1size && t1size->metrics.y_ppem < 24 ) |
t1glyph->outline.flags |= FT_OUTLINE_HIGH_PRECISION; |
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#if 1 |
/* apply the font matrix, if any */ |
if ( font_matrix.xx != 0x10000L || font_matrix.yy != font_matrix.xx || |
font_matrix.xy != 0 || font_matrix.yx != 0 ) |
FT_Outline_Transform( &t1glyph->outline, &font_matrix ); |
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if ( font_offset.x || font_offset.y ) |
FT_Outline_Translate( &t1glyph->outline, |
font_offset.x, |
font_offset.y ); |
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advance.x = metrics->horiAdvance; |
advance.y = 0; |
FT_Vector_Transform( &advance, &font_matrix ); |
metrics->horiAdvance = advance.x + font_offset.x; |
advance.x = 0; |
advance.y = metrics->vertAdvance; |
FT_Vector_Transform( &advance, &font_matrix ); |
metrics->vertAdvance = advance.y + font_offset.y; |
#endif |
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if ( ( load_flags & FT_LOAD_NO_SCALE ) == 0 ) |
{ |
/* scale the outline and the metrics */ |
FT_Int n; |
FT_Outline* cur = decoder.builder.base; |
FT_Vector* vec = cur->points; |
FT_Fixed x_scale = glyph->x_scale; |
FT_Fixed y_scale = glyph->y_scale; |
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/* First of all, scale the points, if we are not hinting */ |
if ( !hinting || ! decoder.builder.hints_funcs ) |
for ( n = cur->n_points; n > 0; n--, vec++ ) |
{ |
vec->x = FT_MulFix( vec->x, x_scale ); |
vec->y = FT_MulFix( vec->y, y_scale ); |
} |
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/* Then scale the metrics */ |
metrics->horiAdvance = FT_MulFix( metrics->horiAdvance, x_scale ); |
metrics->vertAdvance = FT_MulFix( metrics->vertAdvance, y_scale ); |
} |
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/* compute the other metrics */ |
FT_Outline_Get_CBox( &t1glyph->outline, &cbox ); |
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metrics->width = cbox.xMax - cbox.xMin; |
metrics->height = cbox.yMax - cbox.yMin; |
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metrics->horiBearingX = cbox.xMin; |
metrics->horiBearingY = cbox.yMax; |
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if ( load_flags & FT_LOAD_VERTICAL_LAYOUT ) |
{ |
/* make up vertical ones */ |
ft_synthesize_vertical_metrics( metrics, |
metrics->vertAdvance ); |
} |
} |
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/* Set control data to the glyph charstrings. Note that this is */ |
/* _not_ zero-terminated. */ |
t1glyph->control_data = (FT_Byte*)glyph_data.pointer; |
t1glyph->control_len = glyph_data.length; |
} |
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Exit: |
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#ifdef FT_CONFIG_OPTION_INCREMENTAL |
if ( glyph_data_loaded && face->root.internal->incremental_interface ) |
{ |
face->root.internal->incremental_interface->funcs->free_glyph_data( |
face->root.internal->incremental_interface->object, |
&glyph_data ); |
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/* Set the control data to null - it is no longer available if */ |
/* loaded incrementally. */ |
t1glyph->control_data = 0; |
t1glyph->control_len = 0; |
} |
#endif |
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if ( must_finish_decoder ) |
decoder_funcs->done( &decoder ); |
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return error; |
} |
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/* END */ |