diff -r f9283dc4860d -r 88f2e05288ba misc/libfreetype/src/type1/t1gload.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/misc/libfreetype/src/type1/t1gload.c Mon Apr 25 01:46:54 2011 +0200 @@ -0,0 +1,515 @@ +/***************************************************************************/ +/* */ +/* t1gload.c */ +/* */ +/* Type 1 Glyph Loader (body). */ +/* */ +/* Copyright 1996-2001, 2002, 2003, 2004, 2005, 2006, 2008, 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 +#include "t1gload.h" +#include FT_INTERNAL_CALC_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; + +#ifdef FT_CONFIG_OPTION_INCREMENTAL + FT_Incremental_InterfaceRec *inc = + face->root.internal->incremental_interface; +#endif + + + 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 ( inc ) + error = inc->funcs->get_glyph_data( inc->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 && 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 */ + + 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_Get_Advances( T1_Face face, + FT_UInt first, + FT_UInt count, + FT_ULong load_flags, + FT_Fixed* advances ) + { + T1_DecoderRec decoder; + T1_Font type1 = &face->type1; + PSAux_Service psaux = (PSAux_Service)face->psaux; + FT_UInt nn; + FT_Error error; + + + if ( load_flags & FT_LOAD_VERTICAL_LAYOUT ) + { + for ( nn = 0; nn < count; nn++ ) + advances[nn] = 0; + + return T1_Err_Ok; + } + + 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; + + for ( nn = 0; nn < count; nn++ ) + { + error = T1_Parse_Glyph( &decoder, first + nn ); + if ( !error ) + advances[nn] = FIXED_TO_INT( decoder.builder.advance.x ); + else + advances[nn] = 0; + } + + 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 + + +#ifdef FT_CONFIG_OPTION_INCREMENTAL + if ( glyph_index >= (FT_UInt)face->root.num_glyphs && + !face->root.internal->incremental_interface ) +#else + if ( glyph_index >= (FT_UInt)face->root.num_glyphs ) +#endif /* FT_CONFIG_OPTION_INCREMENTAL */ + { + 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; + + if ( size ) + { + glyph->x_scale = size->root.metrics.x_scale; + glyph->y_scale = size->root.metrics.y_scale; + } + else + { + glyph->x_scale = 0x10000L; + glyph->y_scale = 0x10000L; + } + + 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 = + FIXED_TO_INT( decoder.builder.left_bearing.x ); + glyph->root.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 = &glyph->root.metrics; + FT_Vector advance; + + + /* copy the _unscaled_ advance width */ + metrics->horiAdvance = + FIXED_TO_INT( decoder.builder.advance.x ); + glyph->root.linearHoriAdvance = + FIXED_TO_INT( decoder.builder.advance.x ); + glyph->root.internal->glyph_transformed = 0; + + if ( load_flags & FT_LOAD_VERTICAL_LAYOUT ) + { + /* make up vertical ones */ + metrics->vertAdvance = ( face->type1.font_bbox.yMax - + face->type1.font_bbox.yMin ) >> 16; + glyph->root.linearVertAdvance = metrics->vertAdvance; + } + else + { + metrics->vertAdvance = + FIXED_TO_INT( decoder.builder.advance.y ); + glyph->root.linearVertAdvance = + FIXED_TO_INT( decoder.builder.advance.y ); + } + + 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; + + if ( load_flags & FT_LOAD_VERTICAL_LAYOUT ) + { + /* 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 */