0,0 → 1,442 |
/***************************************************************************/ |
/* */ |
/* cidgload.c */ |
/* */ |
/* CID-keyed Type1 Glyph Loader (body). */ |
/* */ |
/* Copyright 1996-2007, 2009, 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 "cidload.h" |
#include "cidgload.h" |
#include FT_INTERNAL_DEBUG_H |
#include FT_INTERNAL_STREAM_H |
#include FT_OUTLINE_H |
#include FT_INTERNAL_CALC_H |
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#include "ciderrs.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_cidgload |
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FT_CALLBACK_DEF( FT_Error ) |
cid_load_glyph( T1_Decoder decoder, |
FT_UInt glyph_index ) |
{ |
CID_Face face = (CID_Face)decoder->builder.face; |
CID_FaceInfo cid = &face->cid; |
FT_Byte* p; |
FT_UInt fd_select; |
FT_Stream stream = face->cid_stream; |
FT_Error error = FT_Err_Ok; |
FT_Byte* charstring = 0; |
FT_Memory memory = face->root.memory; |
FT_ULong glyph_length = 0; |
PSAux_Service psaux = (PSAux_Service)face->psaux; |
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#ifdef FT_CONFIG_OPTION_INCREMENTAL |
FT_Incremental_InterfaceRec *inc = |
face->root.internal->incremental_interface; |
#endif |
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FT_TRACE4(( "cid_load_glyph: glyph index %d\n", glyph_index )); |
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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 ) |
{ |
FT_Data glyph_data; |
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error = inc->funcs->get_glyph_data( inc->object, |
glyph_index, &glyph_data ); |
if ( error ) |
goto Exit; |
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p = (FT_Byte*)glyph_data.pointer; |
fd_select = (FT_UInt)cid_get_offset( &p, (FT_Byte)cid->fd_bytes ); |
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if ( glyph_data.length != 0 ) |
{ |
glyph_length = glyph_data.length - cid->fd_bytes; |
(void)FT_ALLOC( charstring, glyph_length ); |
if ( !error ) |
ft_memcpy( charstring, glyph_data.pointer + cid->fd_bytes, |
glyph_length ); |
} |
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inc->funcs->free_glyph_data( inc->object, &glyph_data ); |
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if ( error ) |
goto Exit; |
} |
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else |
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#endif /* FT_CONFIG_OPTION_INCREMENTAL */ |
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/* For ordinary fonts read the CID font dictionary index */ |
/* and charstring offset from the CIDMap. */ |
{ |
FT_UInt entry_len = cid->fd_bytes + cid->gd_bytes; |
FT_ULong off1; |
|
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if ( FT_STREAM_SEEK( cid->data_offset + cid->cidmap_offset + |
glyph_index * entry_len ) || |
FT_FRAME_ENTER( 2 * entry_len ) ) |
goto Exit; |
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p = (FT_Byte*)stream->cursor; |
fd_select = (FT_UInt) cid_get_offset( &p, (FT_Byte)cid->fd_bytes ); |
off1 = (FT_ULong)cid_get_offset( &p, (FT_Byte)cid->gd_bytes ); |
p += cid->fd_bytes; |
glyph_length = cid_get_offset( &p, (FT_Byte)cid->gd_bytes ) - off1; |
FT_FRAME_EXIT(); |
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if ( fd_select >= (FT_UInt)cid->num_dicts ) |
{ |
error = FT_THROW( Invalid_Offset ); |
goto Exit; |
} |
if ( glyph_length == 0 ) |
goto Exit; |
if ( FT_ALLOC( charstring, glyph_length ) ) |
goto Exit; |
if ( FT_STREAM_READ_AT( cid->data_offset + off1, |
charstring, glyph_length ) ) |
goto Exit; |
} |
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/* Now set up the subrs array and parse the charstrings. */ |
{ |
CID_FaceDict dict; |
CID_Subrs cid_subrs = face->subrs + fd_select; |
FT_Int cs_offset; |
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/* Set up subrs */ |
decoder->num_subrs = cid_subrs->num_subrs; |
decoder->subrs = cid_subrs->code; |
decoder->subrs_len = 0; |
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/* Set up font matrix */ |
dict = cid->font_dicts + fd_select; |
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decoder->font_matrix = dict->font_matrix; |
decoder->font_offset = dict->font_offset; |
decoder->lenIV = dict->private_dict.lenIV; |
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/* Decode the charstring. */ |
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/* Adjustment for seed bytes. */ |
cs_offset = ( decoder->lenIV >= 0 ? decoder->lenIV : 0 ); |
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/* Decrypt only if lenIV >= 0. */ |
if ( decoder->lenIV >= 0 ) |
psaux->t1_decrypt( charstring, glyph_length, 4330 ); |
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error = decoder->funcs.parse_charstrings( |
decoder, charstring + cs_offset, |
(FT_Int)glyph_length - cs_offset ); |
} |
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FT_FREE( charstring ); |
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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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Exit: |
return error; |
} |
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#if 0 |
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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 ) |
cid_face_compute_max_advance( CID_Face face, |
FT_Int* max_advance ) |
{ |
FT_Error error; |
T1_DecoderRec decoder; |
FT_Int glyph_index; |
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PSAux_Service psaux = (PSAux_Service)face->psaux; |
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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 */ |
0, /* glyph names! XXX */ |
0, /* blend == 0 */ |
0, /* hinting == 0 */ |
cid_load_glyph ); |
if ( error ) |
return error; |
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/* TODO: initialize decoder.len_buildchar and decoder.buildchar */ |
/* if we ever support CID-keyed multiple master fonts */ |
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decoder.builder.metrics_only = 1; |
decoder.builder.load_points = 0; |
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/* for each glyph, parse the glyph charstring and extract */ |
/* the advance width */ |
for ( glyph_index = 0; glyph_index < face->root.num_glyphs; |
glyph_index++ ) |
{ |
/* now get load the unscaled outline */ |
error = cid_load_glyph( &decoder, glyph_index ); |
/* ignore the error if one occurred - skip to next glyph */ |
} |
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*max_advance = FIXED_TO_INT( decoder.builder.advance.x ); |
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psaux->t1_decoder_funcs->done( &decoder ); |
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return FT_Err_Ok; |
} |
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#endif /* 0 */ |
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FT_LOCAL_DEF( FT_Error ) |
cid_slot_load_glyph( FT_GlyphSlot cidglyph, /* CID_GlyphSlot */ |
FT_Size cidsize, /* CID_Size */ |
FT_UInt glyph_index, |
FT_Int32 load_flags ) |
{ |
CID_GlyphSlot glyph = (CID_GlyphSlot)cidglyph; |
FT_Error error; |
T1_DecoderRec decoder; |
CID_Face face = (CID_Face)cidglyph->face; |
FT_Bool hinting; |
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PSAux_Service psaux = (PSAux_Service)face->psaux; |
FT_Matrix font_matrix; |
FT_Vector font_offset; |
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if ( glyph_index >= (FT_UInt)face->root.num_glyphs ) |
{ |
error = FT_THROW( Invalid_Argument ); |
goto Exit; |
} |
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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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glyph->x_scale = cidsize->metrics.x_scale; |
glyph->y_scale = cidsize->metrics.y_scale; |
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cidglyph->outline.n_points = 0; |
cidglyph->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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cidglyph->format = FT_GLYPH_FORMAT_OUTLINE; |
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error = psaux->t1_decoder_funcs->init( &decoder, |
cidglyph->face, |
cidsize, |
cidglyph, |
0, /* glyph names -- XXX */ |
0, /* blend == 0 */ |
hinting, |
FT_LOAD_TARGET_MODE( load_flags ), |
cid_load_glyph ); |
if ( error ) |
goto Exit; |
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/* TODO: initialize decoder.len_buildchar and decoder.buildchar */ |
/* if we ever support CID-keyed multiple master fonts */ |
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/* set up the decoder */ |
decoder.builder.no_recurse = FT_BOOL( |
( ( load_flags & FT_LOAD_NO_RECURSE ) != 0 ) ); |
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error = cid_load_glyph( &decoder, glyph_index ); |
if ( error ) |
goto Exit; |
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font_matrix = decoder.font_matrix; |
font_offset = decoder.font_offset; |
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/* save new glyph tables */ |
psaux->t1_decoder_funcs->done( &decoder ); |
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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 */ |
cidglyph->outline.flags &= FT_OUTLINE_OWNER; |
cidglyph->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 = cidglyph->internal; |
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cidglyph->metrics.horiBearingX = |
FIXED_TO_INT( decoder.builder.left_bearing.x ); |
cidglyph->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 = &cidglyph->metrics; |
FT_Vector advance; |
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/* copy the _unscaled_ advance width */ |
metrics->horiAdvance = |
FIXED_TO_INT( decoder.builder.advance.x ); |
cidglyph->linearHoriAdvance = |
FIXED_TO_INT( decoder.builder.advance.x ); |
cidglyph->internal->glyph_transformed = 0; |
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/* make up vertical ones */ |
metrics->vertAdvance = ( face->cid.font_bbox.yMax - |
face->cid.font_bbox.yMin ) >> 16; |
cidglyph->linearVertAdvance = metrics->vertAdvance; |
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cidglyph->format = FT_GLYPH_FORMAT_OUTLINE; |
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if ( cidsize->metrics.y_ppem < 24 ) |
cidglyph->outline.flags |= FT_OUTLINE_HIGH_PRECISION; |
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/* apply the font matrix */ |
FT_Outline_Transform( &cidglyph->outline, &font_matrix ); |
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FT_Outline_Translate( &cidglyph->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; |
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advance.x = 0; |
advance.y = metrics->vertAdvance; |
FT_Vector_Transform( &advance, &font_matrix ); |
metrics->vertAdvance = advance.y + font_offset.y; |
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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 ( !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( &cidglyph->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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Exit: |
return error; |
} |
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/* END */ |