--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/misc/libfreetype/src/cid/cidgload.c Mon Apr 25 01:46:54 2011 +0200
@@ -0,0 +1,442 @@
+/***************************************************************************/
+/* */
+/* cidgload.c */
+/* */
+/* CID-keyed Type1 Glyph Loader (body). */
+/* */
+/* Copyright 1996-2001, 2002, 2003, 2004, 2005, 2006, 2007, 2009, 2010 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_UInt fd_select;
+ FT_Stream stream = face->cid_stream;
+ FT_Error error = CID_Err_Ok;
+ FT_Byte* charstring = 0;
+ 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_TRACE4(( "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 = (FT_UInt)cid_get_offset( &p, (FT_Byte)cid->fd_bytes );
+
+ 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 );
+ }
+
+ 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 = cid->fd_bytes + cid->gd_bytes;
+ FT_ULong off1;
+
+
+ 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 = (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();
+
+ if ( fd_select >= (FT_UInt)cid->num_dicts )
+ {
+ error = CID_Err_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;
+ }
+
+ /* 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;
+
+
+ /* 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 ? decoder->lenIV : 0 );
+
+ /* 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,
+ (FT_Int)glyph_length - cs_offset );
+ }
+
+ FT_FREE( charstring );
+
+#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:
+ 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 CID_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 = CID_Err_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;
+ FT_Vector advance;
+
+
+ /* 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 */
+ FT_Outline_Transform( &cidglyph->outline, &font_matrix );
+
+ FT_Outline_Translate( &cidglyph->outline,
+ font_offset.x,
+ font_offset.y );
+
+ 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;
+
+ 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 */