+++ /dev/null
-/***************************************************************************/
-/* */
-/* cidgload.c */
-/* */
-/* CID-keyed Type1 Glyph Loader (body). */
-/* */
-/* Copyright 1996-2001 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 "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_Info* cid = &face->cid;
- FT_Byte* p;
- FT_UInt entry_len = cid->fd_bytes + cid->gd_bytes;
- FT_UInt fd_select;
- FT_ULong off1, glyph_len;
- FT_Stream stream = face->root.stream;
- FT_Error error = 0;
-
-
- /* read the CID font dict index and charstring offset from the CIDMap */
- if ( FILE_Seek( cid->data_offset + cid->cidmap_offset +
- glyph_index * entry_len ) ||
- ACCESS_Frame( 2 * entry_len ) )
- goto Exit;
-
- 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_len = cid_get_offset( &p, (FT_Byte)cid->gd_bytes ) - off1;
-
- FORGET_Frame();
-
- /* now, if the glyph is not empty, set up the subrs array, and parse */
- /* the charstrings */
- if ( glyph_len > 0 )
- {
- CID_FontDict* dict;
- CID_Subrs* cid_subrs = face->subrs + fd_select;
- FT_Byte* charstring;
- FT_Memory memory = face->root.memory;
-
-
- /* setup subrs */
- decoder->num_subrs = cid_subrs->num_subrs;
- decoder->subrs = cid_subrs->code;
- decoder->subrs_len = 0;
-
- /* setup 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;
-
- /* the charstrings are encoded (stupid!) */
- /* load the charstrings, then execute it */
-
- if ( ALLOC( charstring, glyph_len ) )
- goto Exit;
-
- if ( !FILE_Read_At( cid->data_offset + off1, charstring, glyph_len ) )
- {
- FT_Int cs_offset;
-
-
- /* Adjustment for seed bytes. */
- cs_offset = ( decoder->lenIV >= 0 ? decoder->lenIV : 0 );
-
- /* Decrypt only if lenIV >= 0. */
- if ( decoder->lenIV >= 0 )
- cid_decrypt( charstring, glyph_len, 4330 );
-
- error = decoder->funcs.parse_charstrings( decoder,
- charstring + cs_offset,
- glyph_len - cs_offset );
- }
-
- FREE( charstring );
- }
-
- Exit:
- 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_Compute_Max_Advance( CID_Face face,
- FT_Int* max_advance )
- {
- FT_Error error;
- T1_Decoder decoder;
- FT_Int glyph_index;
-
- PSAux_Interface* psaux = (PSAux_Interface*)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 */
- cid_load_glyph );
- if ( error )
- return error;
-
- 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 = decoder.builder.advance.x;
-
- return CID_Err_Ok;
- }
-
-
-#endif /* 0 */
-
-
- /*************************************************************************/
- /*************************************************************************/
- /*************************************************************************/
- /********** *********/
- /********** *********/
- /********** UNHINTED GLYPH LOADER *********/
- /********** *********/
- /********** The following code is in charge of loading a *********/
- /********** single outline. It completely ignores hinting *********/
- /********** and is used when FT_LOAD_NO_HINTING is set. *********/
- /********** *********/
- /*************************************************************************/
- /*************************************************************************/
- /*************************************************************************/
-
-
- FT_LOCAL_DEF FT_Error
- CID_Load_Glyph( CID_GlyphSlot glyph,
- CID_Size size,
- FT_Int glyph_index,
- FT_Int load_flags )
- {
- FT_Error error;
- T1_Decoder decoder;
- CID_Face face = (CID_Face)glyph->root.face;
- FT_Bool hinting;
-
- PSAux_Interface* psaux = (PSAux_Interface*)face->psaux;
- FT_Matrix font_matrix;
- FT_Vector font_offset;
-
-
- if ( load_flags & FT_LOAD_NO_RECURSE )
- load_flags |= FT_LOAD_NO_SCALE | FT_LOAD_NO_HINTING;
-
- glyph->x_scale = size->root.metrics.x_scale;
- glyph->y_scale = size->root.metrics.y_scale;
-
- glyph->root.outline.n_points = 0;
- glyph->root.outline.n_contours = 0;
-
- hinting = FT_BOOL( ( load_flags & FT_LOAD_NO_SCALE ) == 0 &&
- ( load_flags & FT_LOAD_NO_HINTING ) == 0 );
-
- glyph->root.format = ft_glyph_format_outline;
-
- {
- error = psaux->t1_decoder_funcs->init( &decoder,
- (FT_Face)face,
- (FT_Size)size,
- (FT_GlyphSlot)glyph,
- 0, /* glyph names -- XXX */
- 0, /* blend == 0 */
- cid_load_glyph );
-
- /* set up the decoder */
- decoder.builder.no_recurse = FT_BOOL(
- ( ( load_flags & FT_LOAD_NO_RECURSE ) != 0 ) );
-
- error = cid_load_glyph( &decoder, glyph_index );
-
- 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 */
- if ( !error )
- {
- glyph->root.outline.flags &= ft_outline_owner;
- glyph->root.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 = glyph->root.internal;
-
-
- glyph->root.metrics.horiBearingX = decoder.builder.left_bearing.x;
- glyph->root.metrics.horiAdvance = 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 = &glyph->root.metrics;
-
-
- /* copy the _unscaled_ advance width */
- metrics->horiAdvance = decoder.builder.advance.x;
- glyph->root.linearHoriAdvance = decoder.builder.advance.x;
- glyph->root.internal->glyph_transformed = 0;
-
- /* make up vertical metrics */
- metrics->vertBearingX = 0;
- metrics->vertBearingY = 0;
- metrics->vertAdvance = 0;
-
- glyph->root.linearVertAdvance = 0;
- glyph->root.format = ft_glyph_format_outline;
-
- if ( size && size->root.metrics.y_ppem < 24 )
- glyph->root.outline.flags |= ft_outline_high_precision;
-
- /* apply the font matrix */
- FT_Outline_Transform( &glyph->root.outline, &font_matrix );
-
- FT_Outline_Translate( &glyph->root.outline,
- font_offset.x,
- 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 */
- 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 );
- }
-
- FT_Outline_Get_CBox( &glyph->root.outline, &cbox );
-
- /* Then scale the metrics */
- metrics->horiAdvance = FT_MulFix( metrics->horiAdvance, x_scale );
- metrics->vertAdvance = FT_MulFix( metrics->vertAdvance, y_scale );
-
- metrics->vertBearingX = FT_MulFix( metrics->vertBearingX, x_scale );
- metrics->vertBearingY = FT_MulFix( metrics->vertBearingY, y_scale );
- }
-
- /* compute the other metrics */
- FT_Outline_Get_CBox( &glyph->root.outline, &cbox );
-
- /* grid fit the bounding box if necessary */
- if ( hinting )
- {
- cbox.xMin &= -64;
- cbox.yMin &= -64;
- cbox.xMax = ( cbox.xMax + 63 ) & -64;
- cbox.yMax = ( cbox.yMax + 63 ) & -64;
- }
-
- metrics->width = cbox.xMax - cbox.xMin;
- metrics->height = cbox.yMax - cbox.yMin;
-
- metrics->horiBearingX = cbox.xMin;
- metrics->horiBearingY = cbox.yMax;
- }
- }
- return error;
- }
-
-
-/* END */
projects / rrdtool.git / blobdiff