| /**************************************************************************** |
| * |
| * t1gload.c |
| * |
| * Type 1 Glyph Loader (body). |
| * |
| * Copyright (C) 1996-2021 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 "t1gload.h" |
| #include <freetype/internal/ftcalc.h> |
| #include <freetype/internal/ftdebug.h> |
| #include <freetype/internal/ftstream.h> |
| #include <freetype/ftoutln.h> |
| #include <freetype/internal/psaux.h> |
| #include <freetype/internal/cfftypes.h> |
| #include <freetype/ftdriver.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 t1gload |
| |
| |
| static FT_Error |
| T1_Parse_Glyph_And_Get_Char_String( T1_Decoder decoder, |
| FT_UInt glyph_index, |
| FT_Data* char_string, |
| FT_Bool* force_scaling ) |
| { |
| T1_Face face = (T1_Face)decoder->builder.face; |
| T1_Font type1 = &face->type1; |
| FT_Error error = FT_Err_Ok; |
| |
| PSAux_Service psaux = (PSAux_Service)face->psaux; |
| const T1_Decoder_Funcs decoder_funcs = psaux->t1_decoder_funcs; |
| PS_Decoder psdecoder; |
| |
| #ifdef FT_CONFIG_OPTION_INCREMENTAL |
| FT_Incremental_InterfaceRec *inc = |
| face->root.internal->incremental_interface; |
| #endif |
| |
| #ifdef T1_CONFIG_OPTION_OLD_ENGINE |
| PS_Driver driver = (PS_Driver)FT_FACE_DRIVER( face ); |
| #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 = type1->charstrings_len[glyph_index]; |
| } |
| |
| if ( !error ) |
| { |
| /* choose which renderer to use */ |
| #ifdef T1_CONFIG_OPTION_OLD_ENGINE |
| if ( driver->hinting_engine == FT_HINTING_FREETYPE || |
| decoder->builder.metrics_only ) |
| error = decoder_funcs->parse_charstrings_old( |
| decoder, |
| (FT_Byte*)char_string->pointer, |
| (FT_UInt)char_string->length ); |
| #else |
| if ( decoder->builder.metrics_only ) |
| error = decoder_funcs->parse_metrics( |
| decoder, |
| (FT_Byte*)char_string->pointer, |
| (FT_UInt)char_string->length ); |
| #endif |
| else |
| { |
| CFF_SubFontRec subfont; |
| |
| |
| psaux->ps_decoder_init( &psdecoder, decoder, TRUE ); |
| |
| psaux->t1_make_subfont( FT_FACE( face ), |
| &face->type1.private_dict, &subfont ); |
| psdecoder.current_subfont = &subfont; |
| |
| error = decoder_funcs->parse_charstrings( |
| &psdecoder, |
| (FT_Byte*)char_string->pointer, |
| (FT_ULong)char_string->length ); |
| |
| /* Adobe's engine uses 16.16 numbers everywhere; */ |
| /* as a consequence, glyphs larger than 2000ppem get rejected */ |
| if ( FT_ERR_EQ( error, Glyph_Too_Big ) ) |
| { |
| /* this time, we retry unhinted and scale up the glyph later on */ |
| /* (the engine uses and sets the hardcoded value 0x10000 / 64 = */ |
| /* 0x400 for both `x_scale' and `y_scale' in this case) */ |
| ((T1_GlyphSlot)decoder->builder.glyph)->hint = FALSE; |
| |
| *force_scaling = TRUE; |
| |
| error = decoder_funcs->parse_charstrings( |
| &psdecoder, |
| (FT_Byte*)char_string->pointer, |
| (FT_ULong)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_Bool force_scaling = FALSE; |
| FT_Error error = T1_Parse_Glyph_And_Get_Char_String( |
| decoder, glyph_index, &glyph_data, |
| &force_scaling ); |
| |
| |
| #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; |
| } |
| |
| |
| /*************************************************************************/ |
| /*************************************************************************/ |
| /*************************************************************************/ |
| /********** *********/ |
| /********** 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_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.subrs_hash = type1->subrs_hash; |
| |
| decoder.buildchar = face->buildchar; |
| decoder.len_buildchar = face->len_buildchar; |
| |
| *max_advance = 0; |
| |
| FT_TRACE6(( "T1_Compute_Max_Advance:\n" )); |
| |
| /* 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 */ |
| (void)T1_Parse_Glyph( &decoder, (FT_UInt)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 */ |
| } |
| |
| FT_TRACE6(( "T1_Compute_Max_Advance: max advance: %f\n", |
| *max_advance / 65536.0 )); |
| |
| psaux->t1_decoder_funcs->done( &decoder ); |
| |
| return FT_Err_Ok; |
| } |
| |
| |
| FT_LOCAL_DEF( FT_Error ) |
| T1_Get_Advances( FT_Face t1face, /* T1_Face */ |
| FT_UInt first, |
| FT_UInt count, |
| FT_Int32 load_flags, |
| FT_Fixed* advances ) |
| { |
| T1_Face face = (T1_Face)t1face; |
| T1_DecoderRec decoder; |
| T1_Font type1 = &face->type1; |
| PSAux_Service psaux = (PSAux_Service)face->psaux; |
| FT_UInt nn; |
| FT_Error error; |
| |
| |
| FT_TRACE5(( "T1_Get_Advances:\n" )); |
| |
| if ( load_flags & FT_LOAD_VERTICAL_LAYOUT ) |
| { |
| for ( nn = 0; nn < count; nn++ ) |
| { |
| advances[nn] = 0; |
| |
| FT_TRACE5(( " idx %d: advance height 0 font units\n", |
| first + nn )); |
| } |
| |
| return FT_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.subrs_hash = type1->subrs_hash; |
| |
| 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; |
| |
| FT_TRACE5(( " idx %d: advance width %ld font unit%s\n", |
| first + nn, |
| advances[nn], |
| advances[nn] == 1 ? "" : "s" )); |
| } |
| |
| return FT_Err_Ok; |
| } |
| |
| |
| FT_LOCAL_DEF( FT_Error ) |
| T1_Load_Glyph( FT_GlyphSlot t1glyph, /* T1_GlyphSlot */ |
| FT_Size t1size, /* T1_Size */ |
| FT_UInt glyph_index, |
| FT_Int32 load_flags ) |
| { |
| T1_GlyphSlot glyph = (T1_GlyphSlot)t1glyph; |
| FT_Error error; |
| T1_DecoderRec decoder; |
| T1_Face face = (T1_Face)t1glyph->face; |
| FT_Bool hinting; |
| FT_Bool scaled; |
| FT_Bool force_scaling = FALSE; |
| 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 = FT_THROW( Invalid_Argument ); |
| goto Exit; |
| } |
| |
| FT_TRACE1(( "T1_Load_Glyph: glyph index %d\n", glyph_index )); |
| |
| 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 ( t1size ) |
| { |
| glyph->x_scale = t1size->metrics.x_scale; |
| glyph->y_scale = t1size->metrics.y_scale; |
| } |
| else |
| { |
| glyph->x_scale = 0x10000L; |
| glyph->y_scale = 0x10000L; |
| } |
| |
| t1glyph->outline.n_points = 0; |
| t1glyph->outline.n_contours = 0; |
| |
| hinting = FT_BOOL( !( load_flags & FT_LOAD_NO_SCALE ) && |
| !( load_flags & FT_LOAD_NO_HINTING ) ); |
| scaled = FT_BOOL( !( load_flags & FT_LOAD_NO_SCALE ) ); |
| |
| glyph->hint = hinting; |
| glyph->scaled = scaled; |
| t1glyph->format = FT_GLYPH_FORMAT_OUTLINE; |
| |
| error = decoder_funcs->init( &decoder, |
| t1glyph->face, |
| t1size, |
| t1glyph, |
| (FT_Byte**)type1->glyph_names, |
| face->blend, |
| 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 ); |
| |
| decoder.num_subrs = type1->num_subrs; |
| decoder.subrs = type1->subrs; |
| decoder.subrs_len = type1->subrs_len; |
| decoder.subrs_hash = type1->subrs_hash; |
| |
| 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, |
| &force_scaling ); |
| if ( error ) |
| goto Exit; |
| #ifdef FT_CONFIG_OPTION_INCREMENTAL |
| glyph_data_loaded = 1; |
| #endif |
| |
| hinting = glyph->hint; |
| 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 ) |
| { |
| t1glyph->outline.flags &= FT_OUTLINE_OWNER; |
| t1glyph->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 = t1glyph->internal; |
| |
| |
| t1glyph->metrics.horiBearingX = |
| FIXED_TO_INT( decoder.builder.left_bearing.x ); |
| t1glyph->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 = &t1glyph->metrics; |
| |
| |
| /* copy the _unscaled_ advance width */ |
| metrics->horiAdvance = |
| FIXED_TO_INT( decoder.builder.advance.x ); |
| t1glyph->linearHoriAdvance = |
| FIXED_TO_INT( decoder.builder.advance.x ); |
| t1glyph->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; |
| t1glyph->linearVertAdvance = metrics->vertAdvance; |
| } |
| else |
| { |
| metrics->vertAdvance = |
| FIXED_TO_INT( decoder.builder.advance.y ); |
| t1glyph->linearVertAdvance = |
| FIXED_TO_INT( decoder.builder.advance.y ); |
| } |
| |
| t1glyph->format = FT_GLYPH_FORMAT_OUTLINE; |
| |
| if ( t1size && t1size->metrics.y_ppem < 24 ) |
| t1glyph->outline.flags |= FT_OUTLINE_HIGH_PRECISION; |
| |
| #if 1 |
| /* 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( &t1glyph->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( &t1glyph->outline, |
| font_offset.x, |
| font_offset.y ); |
| |
| metrics->horiAdvance += font_offset.x; |
| metrics->vertAdvance += font_offset.y; |
| } |
| #endif |
| |
| if ( ( load_flags & FT_LOAD_NO_SCALE ) == 0 || force_scaling ) |
| { |
| /* 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( &t1glyph->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. */ |
| t1glyph->control_data = (FT_Byte*)glyph_data.pointer; |
| t1glyph->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. */ |
| t1glyph->control_data = NULL; |
| t1glyph->control_len = 0; |
| } |
| #endif |
| |
| if ( must_finish_decoder ) |
| decoder_funcs->done( &decoder ); |
| |
| return error; |
| } |
| |
| |
| /* END */ |
