/***************************************************************************/ | |
/* */ | |
/* cidgload.c */ | |
/* */ | |
/* CID-keyed Type1 Glyph Loader (body). */ | |
/* */ | |
/* Copyright 1996-2015 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 "cidload.h" | |
#include "cidgload.h" | |
#include FT_INTERNAL_DEBUG_H | |
#include FT_INTERNAL_STREAM_H | |
#include FT_OUTLINE_H | |
#include FT_INTERNAL_CALC_H | |
#include "ciderrs.h" | |
/*************************************************************************/ | |
/* */ | |
/* 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 | |
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_ULong fd_select; | |
FT_Stream stream = face->cid_stream; | |
FT_Error error = FT_Err_Ok; | |
FT_Byte* charstring = NULL; | |
FT_Memory memory = face->root.memory; | |
FT_ULong glyph_length = 0; | |
PSAux_Service psaux = (PSAux_Service)face->psaux; | |
#ifdef FT_CONFIG_OPTION_INCREMENTAL | |
FT_Incremental_InterfaceRec *inc = | |
face->root.internal->incremental_interface; | |
#endif | |
FT_TRACE1(( "cid_load_glyph: glyph index %d\n", glyph_index )); | |
#ifdef FT_CONFIG_OPTION_INCREMENTAL | |
/* For incremental fonts get the character data using */ | |
/* the callback function. */ | |
if ( inc ) | |
{ | |
FT_Data glyph_data; | |
error = inc->funcs->get_glyph_data( inc->object, | |
glyph_index, &glyph_data ); | |
if ( error ) | |
goto Exit; | |
p = (FT_Byte*)glyph_data.pointer; | |
fd_select = cid_get_offset( &p, (FT_Byte)cid->fd_bytes ); | |
if ( glyph_data.length != 0 ) | |
{ | |
glyph_length = (FT_ULong)( 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 ); | |
} | |
inc->funcs->free_glyph_data( inc->object, &glyph_data ); | |
if ( error ) | |
goto Exit; | |
} | |
else | |
#endif /* FT_CONFIG_OPTION_INCREMENTAL */ | |
/* For ordinary fonts read the CID font dictionary index */ | |
/* and charstring offset from the CIDMap. */ | |
{ | |
FT_UInt entry_len = (FT_UInt)( cid->fd_bytes + cid->gd_bytes ); | |
FT_ULong off1, off2; | |
if ( FT_STREAM_SEEK( cid->data_offset + cid->cidmap_offset + | |
glyph_index * entry_len ) || | |
FT_FRAME_ENTER( 2 * entry_len ) ) | |
goto Exit; | |
p = (FT_Byte*)stream->cursor; | |
fd_select = cid_get_offset( &p, (FT_Byte)cid->fd_bytes ); | |
off1 = cid_get_offset( &p, (FT_Byte)cid->gd_bytes ); | |
p += cid->fd_bytes; | |
off2 = cid_get_offset( &p, (FT_Byte)cid->gd_bytes ); | |
FT_FRAME_EXIT(); | |
if ( fd_select >= (FT_ULong)cid->num_dicts || | |
off2 > stream->size || | |
off1 > off2 ) | |
{ | |
FT_TRACE0(( "cid_load_glyph: invalid glyph stream offsets\n" )); | |
error = FT_THROW( Invalid_Offset ); | |
goto Exit; | |
} | |
glyph_length = off2 - off1; | |
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; | |
} | |
/* Now set up the subrs array and parse the charstrings. */ | |
{ | |
CID_FaceDict dict; | |
CID_Subrs cid_subrs = face->subrs + fd_select; | |
FT_UInt cs_offset; | |
/* Set up subrs */ | |
decoder->num_subrs = cid_subrs->num_subrs; | |
decoder->subrs = cid_subrs->code; | |
decoder->subrs_len = 0; | |
/* Set up font matrix */ | |
dict = cid->font_dicts + fd_select; | |
decoder->font_matrix = dict->font_matrix; | |
decoder->font_offset = dict->font_offset; | |
decoder->lenIV = dict->private_dict.lenIV; | |
/* Decode the charstring. */ | |
/* Adjustment for seed bytes. */ | |
cs_offset = decoder->lenIV >= 0 ? (FT_UInt)decoder->lenIV : 0; | |
if ( cs_offset > glyph_length ) | |
{ | |
FT_TRACE0(( "cid_load_glyph: invalid glyph stream offsets\n" )); | |
error = FT_THROW( Invalid_Offset ); | |
goto Exit; | |
} | |
/* Decrypt only if lenIV >= 0. */ | |
if ( decoder->lenIV >= 0 ) | |
psaux->t1_decrypt( charstring, glyph_length, 4330 ); | |
error = decoder->funcs.parse_charstrings( | |
decoder, charstring + cs_offset, | |
glyph_length - cs_offset ); | |
} | |
#ifdef FT_CONFIG_OPTION_INCREMENTAL | |
/* Incremental fonts can optionally override the metrics. */ | |
if ( !error && inc && inc->funcs->get_glyph_metrics ) | |
{ | |
FT_Incremental_MetricsRec metrics; | |
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 ); | |
error = inc->funcs->get_glyph_metrics( inc->object, | |
glyph_index, FALSE, &metrics ); | |
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 ); | |
} | |
#endif /* FT_CONFIG_OPTION_INCREMENTAL */ | |
Exit: | |
FT_FREE( charstring ); | |
return error; | |
} | |
#if 0 | |
/*************************************************************************/ | |
/*************************************************************************/ | |
/*************************************************************************/ | |
/********** *********/ | |
/********** *********/ | |
/********** 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. *********/ | |
/********** *********/ | |
/*************************************************************************/ | |
/*************************************************************************/ | |
/*************************************************************************/ | |
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; | |
PSAux_Service psaux = (PSAux_Service)face->psaux; | |
*max_advance = 0; | |
/* 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; | |
/* TODO: initialize decoder.len_buildchar and decoder.buildchar */ | |
/* if we ever support CID-keyed multiple master fonts */ | |
decoder.builder.metrics_only = 1; | |
decoder.builder.load_points = 0; | |
/* 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 */ | |
} | |
*max_advance = FIXED_TO_INT( decoder.builder.advance.x ); | |
psaux->t1_decoder_funcs->done( &decoder ); | |
return FT_Err_Ok; | |
} | |
#endif /* 0 */ | |
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; | |
PSAux_Service psaux = (PSAux_Service)face->psaux; | |
FT_Matrix font_matrix; | |
FT_Vector font_offset; | |
if ( glyph_index >= (FT_UInt)face->root.num_glyphs ) | |
{ | |
error = FT_THROW( Invalid_Argument ); | |
goto Exit; | |
} | |
if ( load_flags & FT_LOAD_NO_RECURSE ) | |
load_flags |= FT_LOAD_NO_SCALE | FT_LOAD_NO_HINTING; | |
glyph->x_scale = cidsize->metrics.x_scale; | |
glyph->y_scale = cidsize->metrics.y_scale; | |
cidglyph->outline.n_points = 0; | |
cidglyph->outline.n_contours = 0; | |
hinting = FT_BOOL( ( load_flags & FT_LOAD_NO_SCALE ) == 0 && | |
( load_flags & FT_LOAD_NO_HINTING ) == 0 ); | |
cidglyph->format = FT_GLYPH_FORMAT_OUTLINE; | |
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; | |
/* TODO: initialize decoder.len_buildchar and decoder.buildchar */ | |
/* if we ever support CID-keyed multiple master fonts */ | |
/* set up the decoder */ | |
decoder.builder.no_recurse = FT_BOOL( | |
( ( load_flags & FT_LOAD_NO_RECURSE ) != 0 ) ); | |
error = cid_load_glyph( &decoder, glyph_index ); | |
if ( error ) | |
goto Exit; | |
font_matrix = decoder.font_matrix; | |
font_offset = decoder.font_offset; | |
/* save new glyph tables */ | |
psaux->t1_decoder_funcs->done( &decoder ); | |
/* 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; | |
/* for composite glyphs, return only left side bearing and */ | |
/* advance width */ | |
if ( load_flags & FT_LOAD_NO_RECURSE ) | |
{ | |
FT_Slot_Internal internal = cidglyph->internal; | |
cidglyph->metrics.horiBearingX = | |
FIXED_TO_INT( decoder.builder.left_bearing.x ); | |
cidglyph->metrics.horiAdvance = | |
FIXED_TO_INT( decoder.builder.advance.x ); | |
internal->glyph_matrix = font_matrix; | |
internal->glyph_delta = font_offset; | |
internal->glyph_transformed = 1; | |
} | |
else | |
{ | |
FT_BBox cbox; | |
FT_Glyph_Metrics* metrics = &cidglyph->metrics; | |
/* 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; | |
/* make up vertical ones */ | |
metrics->vertAdvance = ( face->cid.font_bbox.yMax - | |
face->cid.font_bbox.yMin ) >> 16; | |
cidglyph->linearVertAdvance = metrics->vertAdvance; | |
cidglyph->format = FT_GLYPH_FORMAT_OUTLINE; | |
if ( cidsize->metrics.y_ppem < 24 ) | |
cidglyph->outline.flags |= FT_OUTLINE_HIGH_PRECISION; | |
/* apply the font matrix, if any */ | |
if ( font_matrix.xx != 0x10000L || font_matrix.yy != 0x10000L || | |
font_matrix.xy != 0 || font_matrix.yx != 0 ) | |
{ | |
FT_Outline_Transform( &cidglyph->outline, &font_matrix ); | |
metrics->horiAdvance = FT_MulFix( metrics->horiAdvance, | |
font_matrix.xx ); | |
metrics->vertAdvance = FT_MulFix( metrics->vertAdvance, | |
font_matrix.yy ); | |
} | |
if ( font_offset.x || font_offset.y ) | |
{ | |
FT_Outline_Translate( &cidglyph->outline, | |
font_offset.x, | |
font_offset.y ); | |
metrics->horiAdvance += font_offset.x; | |
metrics->vertAdvance += font_offset.y; | |
} | |
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; | |
/* 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 ); | |
} | |
/* Then scale the metrics */ | |
metrics->horiAdvance = FT_MulFix( metrics->horiAdvance, x_scale ); | |
metrics->vertAdvance = FT_MulFix( metrics->vertAdvance, y_scale ); | |
} | |
/* compute the other metrics */ | |
FT_Outline_Get_CBox( &cidglyph->outline, &cbox ); | |
metrics->width = cbox.xMax - cbox.xMin; | |
metrics->height = cbox.yMax - cbox.yMin; | |
metrics->horiBearingX = cbox.xMin; | |
metrics->horiBearingY = cbox.yMax; | |
if ( load_flags & FT_LOAD_VERTICAL_LAYOUT ) | |
{ | |
/* make up vertical ones */ | |
ft_synthesize_vertical_metrics( metrics, | |
metrics->vertAdvance ); | |
} | |
} | |
Exit: | |
return error; | |
} | |
/* END */ |