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-rw-r--r--src/type1/t1gload.c422
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diff --git a/src/type1/t1gload.c b/src/type1/t1gload.c
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-/***************************************************************************/
-/* */
-/* t1gload.c */
-/* */
-/* Type 1 Glyph Loader (body). */
-/* */
-/* Copyright 1996-2001, 2002, 2003, 2004, 2005, 2006 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 "t1gload.h"
-#include FT_INTERNAL_DEBUG_H
-#include FT_INTERNAL_STREAM_H
-#include FT_OUTLINE_H
-#include FT_INTERNAL_POSTSCRIPT_AUX_H
-
-#include "t1errors.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_t1gload
-
-
- /*************************************************************************/
- /*************************************************************************/
- /*************************************************************************/
- /********** *********/
- /********** 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 )
- 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 = T1_Err_Ok;
-
-
- decoder->font_matrix = type1->font_matrix;
- decoder->font_offset = type1->font_offset;
-
-#ifdef FT_CONFIG_OPTION_INCREMENTAL
-
- /* For incremental fonts get the character data using the */
- /* callback function. */
- if ( face->root.internal->incremental_interface )
- error = face->root.internal->incremental_interface->funcs->get_glyph_data(
- face->root.internal->incremental_interface->object,
- glyph_index, char_string );
- else
-
-#endif /* FT_CONFIG_OPTION_INCREMENTAL */
-
- /* 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];
- }
-
- if ( !error )
- error = decoder->funcs.parse_charstrings(
- decoder, (FT_Byte*)char_string->pointer,
- char_string->length );
-
-#ifdef FT_CONFIG_OPTION_INCREMENTAL
-
- /* Incremental fonts can optionally override the metrics. */
- if ( !error && face->root.internal->incremental_interface &&
- face->root.internal->incremental_interface->funcs->get_glyph_metrics )
- {
- FT_Incremental_MetricsRec metrics;
-
-
- metrics.bearing_x = decoder->builder.left_bearing.x;
- metrics.bearing_y = decoder->builder.left_bearing.y;
- metrics.advance = decoder->builder.advance.x;
- error = face->root.internal->incremental_interface->funcs->get_glyph_metrics(
- face->root.internal->incremental_interface->object,
- glyph_index, FALSE, &metrics );
- decoder->builder.left_bearing.x = metrics.bearing_x;
- decoder->builder.left_bearing.y = metrics.bearing_y;
- decoder->builder.advance.x = metrics.advance;
- decoder->builder.advance.y = 0;
- }
-
-#endif /* FT_CONFIG_OPTION_INCREMENTAL */
-
- return error;
- }
-
-
- 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 );
-
-
-#ifdef FT_CONFIG_OPTION_INCREMENTAL
-
- if ( !error )
- {
- T1_Face face = (T1_Face)decoder->builder.face;
-
-
- if ( face->root.internal->incremental_interface )
- face->root.internal->incremental_interface->funcs->free_glyph_data(
- face->root.internal->incremental_interface->object,
- &glyph_data );
- }
-
-#endif /* FT_CONFIG_OPTION_INCREMENTAL */
-
- return error;
- }
-
-
- 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;
-
-
- FT_ASSERT( ( face->len_buildchar == 0 ) == ( face->buildchar == NULL ) );
-
- *max_advance = 0;
-
- /* 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;
-
- decoder.builder.metrics_only = 1;
- decoder.builder.load_points = 0;
-
- decoder.num_subrs = type1->num_subrs;
- decoder.subrs = type1->subrs;
- decoder.subrs_len = type1->subrs_len;
-
- decoder.buildchar = face->buildchar;
- decoder.len_buildchar = face->len_buildchar;
-
- *max_advance = 0;
-
- /* 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;
-
- /* ignore the error if one occurred - skip to next glyph */
- }
-
- psaux->t1_decoder_funcs->done( &decoder );
-
- return T1_Err_Ok;
- }
-
-
- FT_LOCAL_DEF( FT_Error )
- T1_Load_Glyph( T1_GlyphSlot glyph,
- T1_Size size,
- FT_UInt glyph_index,
- FT_Int32 load_flags )
- {
- FT_Error error;
- T1_DecoderRec decoder;
- T1_Face face = (T1_Face)glyph->root.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;
-
- 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
-
-
- if ( glyph_index >= (FT_UInt)face->root.num_glyphs )
- {
- error = T1_Err_Invalid_Argument;
- goto Exit;
- }
-
- FT_ASSERT( ( face->len_buildchar == 0 ) == ( face->buildchar == NULL ) );
-
- 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 = decoder_funcs->init( &decoder,
- (FT_Face)face,
- (FT_Size)size,
- (FT_GlyphSlot)glyph,
- (FT_Byte**)type1->glyph_names,
- face->blend,
- FT_BOOL( hinting ),
- FT_LOAD_TARGET_MODE( load_flags ),
- T1_Parse_Glyph );
- if ( error )
- goto Exit;
-
- must_finish_decoder = TRUE;
-
- decoder.builder.no_recurse = FT_BOOL(
- ( load_flags & FT_LOAD_NO_RECURSE ) != 0 );
-
- decoder.num_subrs = type1->num_subrs;
- decoder.subrs = type1->subrs;
- decoder.subrs_len = type1->subrs_len;
-
- decoder.buildchar = face->buildchar;
- decoder.len_buildchar = face->len_buildchar;
-
- /* 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
-
- font_matrix = decoder.font_matrix;
- font_offset = decoder.font_offset;
-
- /* save new glyph tables */
- decoder_funcs->done( &decoder );
-
- must_finish_decoder = FALSE;
-
- /* 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;
- FT_Vector advance;
-
-
- /* 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 ones */
- metrics->vertAdvance = ( face->type1.font_bbox.yMax -
- face->type1.font_bbox.yMin ) >> 16;
- glyph->root.linearVertAdvance = metrics->vertAdvance;
-
- glyph->root.format = FT_GLYPH_FORMAT_OUTLINE;
-
- if ( size && size->root.metrics.y_ppem < 24 )
- glyph->root.outline.flags |= FT_OUTLINE_HIGH_PRECISION;
-
-#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( &glyph->root.outline, &font_matrix );
-
- if ( font_offset.x || font_offset.y )
- FT_Outline_Translate( &glyph->root.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;
-#endif
-
- 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 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 );
- }
-
- /* 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( &glyph->root.outline, &cbox );
-
- metrics->width = cbox.xMax - cbox.xMin;
- metrics->height = cbox.yMax - cbox.yMin;
-
- metrics->horiBearingX = cbox.xMin;
- metrics->horiBearingY = cbox.yMax;
-
- /* make up vertical ones */
- ft_synthesize_vertical_metrics( metrics,
- metrics->vertAdvance );
- }
-
- /* Set control data to the glyph charstrings. Note that this is */
- /* _not_ zero-terminated. */
- glyph->root.control_data = (FT_Byte*)glyph_data.pointer;
- glyph->root.control_len = glyph_data.length;
- }
-
-
- Exit:
-
-#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 );
-
- /* Set the control data to null - it is no longer available if */
- /* loaded incrementally. */
- glyph->root.control_data = 0;
- glyph->root.control_len = 0;
- }
-#endif
-
- if ( must_finish_decoder )
- decoder_funcs->done( &decoder );
-
- return error;
- }
-
-
-/* END */