| /***************************************************************************/ |
| /* */ |
| /* cffgload.c */ |
| /* */ |
| /* OpenType Glyph Loader (body). */ |
| /* */ |
| /* Copyright 1996-2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 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 FT_INTERNAL_DEBUG_H |
| #include FT_INTERNAL_CALC_H |
| #include FT_INTERNAL_STREAM_H |
| #include FT_INTERNAL_SFNT_H |
| #include FT_OUTLINE_H |
| #include FT_TRUETYPE_TAGS_H |
| #include FT_INTERNAL_POSTSCRIPT_HINTS_H |
| |
| #include "cffobjs.h" |
| #include "cffload.h" |
| #include "cffgload.h" |
| |
| #include "cfferrs.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_cffgload |
| |
| |
| typedef enum CFF_Operator_ |
| { |
| cff_op_unknown = 0, |
| |
| cff_op_rmoveto, |
| cff_op_hmoveto, |
| cff_op_vmoveto, |
| |
| cff_op_rlineto, |
| cff_op_hlineto, |
| cff_op_vlineto, |
| |
| cff_op_rrcurveto, |
| cff_op_hhcurveto, |
| cff_op_hvcurveto, |
| cff_op_rcurveline, |
| cff_op_rlinecurve, |
| cff_op_vhcurveto, |
| cff_op_vvcurveto, |
| |
| cff_op_flex, |
| cff_op_hflex, |
| cff_op_hflex1, |
| cff_op_flex1, |
| |
| cff_op_endchar, |
| |
| cff_op_hstem, |
| cff_op_vstem, |
| cff_op_hstemhm, |
| cff_op_vstemhm, |
| |
| cff_op_hintmask, |
| cff_op_cntrmask, |
| cff_op_dotsection, /* deprecated, acts as no-op */ |
| |
| cff_op_abs, |
| cff_op_add, |
| cff_op_sub, |
| cff_op_div, |
| cff_op_neg, |
| cff_op_random, |
| cff_op_mul, |
| cff_op_sqrt, |
| |
| cff_op_blend, |
| |
| cff_op_drop, |
| cff_op_exch, |
| cff_op_index, |
| cff_op_roll, |
| cff_op_dup, |
| |
| cff_op_put, |
| cff_op_get, |
| cff_op_store, |
| cff_op_load, |
| |
| cff_op_and, |
| cff_op_or, |
| cff_op_not, |
| cff_op_eq, |
| cff_op_ifelse, |
| |
| cff_op_callsubr, |
| cff_op_callgsubr, |
| cff_op_return, |
| |
| /* Type 1 opcodes: invalid but seen in real life */ |
| cff_op_hsbw, |
| cff_op_closepath, |
| cff_op_callothersubr, |
| cff_op_pop, |
| |
| /* do not remove */ |
| cff_op_max |
| |
| } CFF_Operator; |
| |
| |
| #define CFF_COUNT_CHECK_WIDTH 0x80 |
| #define CFF_COUNT_EXACT 0x40 |
| #define CFF_COUNT_CLEAR_STACK 0x20 |
| |
| /* count values which have the `CFF_COUNT_CHECK_WIDTH' flag set are */ |
| /* used for checking the width and requested numbers of arguments */ |
| /* only; they are set to zero afterwards */ |
| |
| /* the other two flags are informative only and unused currently */ |
| |
| static const FT_Byte cff_argument_counts[] = |
| { |
| 0, /* unknown */ |
| |
| 2 | CFF_COUNT_CHECK_WIDTH | CFF_COUNT_EXACT, /* rmoveto */ |
| 1 | CFF_COUNT_CHECK_WIDTH | CFF_COUNT_EXACT, |
| 1 | CFF_COUNT_CHECK_WIDTH | CFF_COUNT_EXACT, |
| |
| 0 | CFF_COUNT_CLEAR_STACK, /* rlineto */ |
| 0 | CFF_COUNT_CLEAR_STACK, |
| 0 | CFF_COUNT_CLEAR_STACK, |
| |
| 0 | CFF_COUNT_CLEAR_STACK, /* rrcurveto */ |
| 0 | CFF_COUNT_CLEAR_STACK, |
| 0 | CFF_COUNT_CLEAR_STACK, |
| 0 | CFF_COUNT_CLEAR_STACK, |
| 0 | CFF_COUNT_CLEAR_STACK, |
| 0 | CFF_COUNT_CLEAR_STACK, |
| 0 | CFF_COUNT_CLEAR_STACK, |
| |
| 13, /* flex */ |
| 7, |
| 9, |
| 11, |
| |
| 0 | CFF_COUNT_CHECK_WIDTH, /* endchar */ |
| |
| 2 | CFF_COUNT_CHECK_WIDTH, /* hstem */ |
| 2 | CFF_COUNT_CHECK_WIDTH, |
| 2 | CFF_COUNT_CHECK_WIDTH, |
| 2 | CFF_COUNT_CHECK_WIDTH, |
| |
| 0 | CFF_COUNT_CHECK_WIDTH, /* hintmask */ |
| 0 | CFF_COUNT_CHECK_WIDTH, /* cntrmask */ |
| 0, /* dotsection */ |
| |
| 1, /* abs */ |
| 2, |
| 2, |
| 2, |
| 1, |
| 0, |
| 2, |
| 1, |
| |
| 1, /* blend */ |
| |
| 1, /* drop */ |
| 2, |
| 1, |
| 2, |
| 1, |
| |
| 2, /* put */ |
| 1, |
| 4, |
| 3, |
| |
| 2, /* and */ |
| 2, |
| 1, |
| 2, |
| 4, |
| |
| 1, /* callsubr */ |
| 1, |
| 0, |
| |
| 2, /* hsbw */ |
| 0, |
| 0, |
| 0 |
| }; |
| |
| |
| /*************************************************************************/ |
| /*************************************************************************/ |
| /*************************************************************************/ |
| /********** *********/ |
| /********** *********/ |
| /********** GENERIC CHARSTRING PARSING *********/ |
| /********** *********/ |
| /********** *********/ |
| /*************************************************************************/ |
| /*************************************************************************/ |
| /*************************************************************************/ |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* cff_builder_init */ |
| /* */ |
| /* <Description> */ |
| /* Initializes a given glyph builder. */ |
| /* */ |
| /* <InOut> */ |
| /* builder :: A pointer to the glyph builder to initialize. */ |
| /* */ |
| /* <Input> */ |
| /* face :: The current face object. */ |
| /* */ |
| /* size :: The current size object. */ |
| /* */ |
| /* glyph :: The current glyph object. */ |
| /* */ |
| /* hinting :: Whether hinting is active. */ |
| /* */ |
| static void |
| cff_builder_init( CFF_Builder* builder, |
| TT_Face face, |
| CFF_Size size, |
| CFF_GlyphSlot glyph, |
| FT_Bool hinting ) |
| { |
| builder->path_begun = 0; |
| builder->load_points = 1; |
| |
| builder->face = face; |
| builder->glyph = glyph; |
| builder->memory = face->root.memory; |
| |
| if ( glyph ) |
| { |
| FT_GlyphLoader loader = glyph->root.internal->loader; |
| |
| |
| builder->loader = loader; |
| builder->base = &loader->base.outline; |
| builder->current = &loader->current.outline; |
| FT_GlyphLoader_Rewind( loader ); |
| |
| builder->hints_globals = 0; |
| builder->hints_funcs = 0; |
| |
| if ( hinting && size ) |
| { |
| CFF_Internal internal = (CFF_Internal)size->root.internal; |
| |
| |
| builder->hints_globals = (void *)internal->topfont; |
| builder->hints_funcs = glyph->root.internal->glyph_hints; |
| } |
| } |
| |
| builder->pos_x = 0; |
| builder->pos_y = 0; |
| |
| builder->left_bearing.x = 0; |
| builder->left_bearing.y = 0; |
| builder->advance.x = 0; |
| builder->advance.y = 0; |
| } |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* cff_builder_done */ |
| /* */ |
| /* <Description> */ |
| /* Finalizes a given glyph builder. Its contents can still be used */ |
| /* after the call, but the function saves important information */ |
| /* within the corresponding glyph slot. */ |
| /* */ |
| /* <Input> */ |
| /* builder :: A pointer to the glyph builder to finalize. */ |
| /* */ |
| static void |
| cff_builder_done( CFF_Builder* builder ) |
| { |
| CFF_GlyphSlot glyph = builder->glyph; |
| |
| |
| if ( glyph ) |
| glyph->root.outline = *builder->base; |
| } |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* cff_compute_bias */ |
| /* */ |
| /* <Description> */ |
| /* Computes the bias value in dependence of the number of glyph */ |
| /* subroutines. */ |
| /* */ |
| /* <Input> */ |
| /* num_subrs :: The number of glyph subroutines. */ |
| /* */ |
| /* <Return> */ |
| /* The bias value. */ |
| static FT_Int |
| cff_compute_bias( FT_UInt num_subrs ) |
| { |
| FT_Int result; |
| |
| |
| if ( num_subrs < 1240 ) |
| result = 107; |
| else if ( num_subrs < 33900U ) |
| result = 1131; |
| else |
| result = 32768U; |
| |
| return result; |
| } |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* cff_decoder_init */ |
| /* */ |
| /* <Description> */ |
| /* Initializes a given glyph decoder. */ |
| /* */ |
| /* <InOut> */ |
| /* decoder :: A pointer to the glyph builder to initialize. */ |
| /* */ |
| /* <Input> */ |
| /* face :: The current face object. */ |
| /* */ |
| /* size :: The current size object. */ |
| /* */ |
| /* slot :: The current glyph object. */ |
| /* */ |
| /* hinting :: Whether hinting is active. */ |
| /* */ |
| /* hint_mode :: The hinting mode. */ |
| /* */ |
| FT_LOCAL_DEF( void ) |
| cff_decoder_init( CFF_Decoder* decoder, |
| TT_Face face, |
| CFF_Size size, |
| CFF_GlyphSlot slot, |
| FT_Bool hinting, |
| FT_Render_Mode hint_mode ) |
| { |
| CFF_Font cff = (CFF_Font)face->extra.data; |
| |
| |
| /* clear everything */ |
| FT_MEM_ZERO( decoder, sizeof ( *decoder ) ); |
| |
| /* initialize builder */ |
| cff_builder_init( &decoder->builder, face, size, slot, hinting ); |
| |
| /* initialize Type2 decoder */ |
| decoder->num_globals = cff->num_global_subrs; |
| decoder->globals = cff->global_subrs; |
| decoder->globals_bias = cff_compute_bias( decoder->num_globals ); |
| |
| decoder->hint_mode = hint_mode; |
| } |
| |
| |
| /* this function is used to select the subfont */ |
| /* and the locals subrs array */ |
| FT_LOCAL_DEF( FT_Error ) |
| cff_decoder_prepare( CFF_Decoder* decoder, |
| CFF_Size size, |
| FT_UInt glyph_index ) |
| { |
| CFF_Builder *builder = &decoder->builder; |
| CFF_Font cff = (CFF_Font)builder->face->extra.data; |
| CFF_SubFont sub = &cff->top_font; |
| FT_Error error = CFF_Err_Ok; |
| |
| |
| /* manage CID fonts */ |
| if ( cff->num_subfonts ) |
| { |
| FT_Byte fd_index = cff_fd_select_get( &cff->fd_select, glyph_index ); |
| |
| |
| if ( fd_index >= cff->num_subfonts ) |
| { |
| FT_TRACE4(( "cff_decoder_prepare: invalid CID subfont index\n" )); |
| error = CFF_Err_Invalid_File_Format; |
| goto Exit; |
| } |
| |
| FT_TRACE4(( "glyph index %d (subfont %d):\n", glyph_index, fd_index )); |
| |
| sub = cff->subfonts[fd_index]; |
| |
| if ( builder->hints_funcs && size ) |
| { |
| CFF_Internal internal = (CFF_Internal)size->root.internal; |
| |
| |
| /* for CFFs without subfonts, this value has already been set */ |
| builder->hints_globals = (void *)internal->subfonts[fd_index]; |
| } |
| } |
| #ifdef FT_DEBUG_LEVEL_TRACE |
| else |
| FT_TRACE4(( "glyph index %d:\n", glyph_index )); |
| #endif |
| |
| decoder->num_locals = sub->num_local_subrs; |
| decoder->locals = sub->local_subrs; |
| decoder->locals_bias = cff_compute_bias( decoder->num_locals ); |
| |
| decoder->glyph_width = sub->private_dict.default_width; |
| decoder->nominal_width = sub->private_dict.nominal_width; |
| |
| Exit: |
| return error; |
| } |
| |
| |
| /* check that there is enough space for `count' more points */ |
| static FT_Error |
| check_points( CFF_Builder* builder, |
| FT_Int count ) |
| { |
| return FT_GLYPHLOADER_CHECK_POINTS( builder->loader, count, 0 ); |
| } |
| |
| |
| /* add a new point, do not check space */ |
| static void |
| cff_builder_add_point( CFF_Builder* builder, |
| FT_Pos x, |
| FT_Pos y, |
| FT_Byte flag ) |
| { |
| FT_Outline* outline = builder->current; |
| |
| |
| if ( builder->load_points ) |
| { |
| FT_Vector* point = outline->points + outline->n_points; |
| FT_Byte* control = (FT_Byte*)outline->tags + outline->n_points; |
| |
| |
| point->x = x >> 16; |
| point->y = y >> 16; |
| *control = (FT_Byte)( flag ? FT_CURVE_TAG_ON : FT_CURVE_TAG_CUBIC ); |
| |
| builder->last = *point; |
| } |
| |
| outline->n_points++; |
| } |
| |
| |
| /* check space for a new on-curve point, then add it */ |
| static FT_Error |
| cff_builder_add_point1( CFF_Builder* builder, |
| FT_Pos x, |
| FT_Pos y ) |
| { |
| FT_Error error; |
| |
| |
| error = check_points( builder, 1 ); |
| if ( !error ) |
| cff_builder_add_point( builder, x, y, 1 ); |
| |
| return error; |
| } |
| |
| |
| /* check space for a new contour, then add it */ |
| static FT_Error |
| cff_builder_add_contour( CFF_Builder* builder ) |
| { |
| FT_Outline* outline = builder->current; |
| FT_Error error; |
| |
| |
| if ( !builder->load_points ) |
| { |
| outline->n_contours++; |
| return CFF_Err_Ok; |
| } |
| |
| error = FT_GLYPHLOADER_CHECK_POINTS( builder->loader, 0, 1 ); |
| if ( !error ) |
| { |
| if ( outline->n_contours > 0 ) |
| outline->contours[outline->n_contours - 1] = |
| (short)( outline->n_points - 1 ); |
| |
| outline->n_contours++; |
| } |
| |
| return error; |
| } |
| |
| |
| /* if a path was begun, add its first on-curve point */ |
| static FT_Error |
| cff_builder_start_point( CFF_Builder* builder, |
| FT_Pos x, |
| FT_Pos y ) |
| { |
| FT_Error error = CFF_Err_Ok; |
| |
| |
| /* test whether we are building a new contour */ |
| if ( !builder->path_begun ) |
| { |
| builder->path_begun = 1; |
| error = cff_builder_add_contour( builder ); |
| if ( !error ) |
| error = cff_builder_add_point1( builder, x, y ); |
| } |
| |
| return error; |
| } |
| |
| |
| /* close the current contour */ |
| static void |
| cff_builder_close_contour( CFF_Builder* builder ) |
| { |
| FT_Outline* outline = builder->current; |
| |
| |
| if ( !outline ) |
| return; |
| |
| /* XXXX: We must not include the last point in the path if it */ |
| /* is located on the first point. */ |
| if ( outline->n_points > 1 ) |
| { |
| FT_Int first = 0; |
| FT_Vector* p1 = outline->points + first; |
| FT_Vector* p2 = outline->points + outline->n_points - 1; |
| FT_Byte* control = (FT_Byte*)outline->tags + outline->n_points - 1; |
| |
| |
| if ( outline->n_contours > 1 ) |
| { |
| first = outline->contours[outline->n_contours - 2] + 1; |
| p1 = outline->points + first; |
| } |
| |
| /* `delete' last point only if it coincides with the first */ |
| /* point and if it is not a control point (which can happen). */ |
| if ( p1->x == p2->x && p1->y == p2->y ) |
| if ( *control == FT_CURVE_TAG_ON ) |
| outline->n_points--; |
| } |
| |
| if ( outline->n_contours > 0 ) |
| outline->contours[outline->n_contours - 1] = |
| (short)( outline->n_points - 1 ); |
| } |
| |
| |
| static FT_Int |
| cff_lookup_glyph_by_stdcharcode( CFF_Font cff, |
| FT_Int charcode ) |
| { |
| FT_UInt n; |
| FT_UShort glyph_sid; |
| |
| |
| /* CID-keyed fonts don't have glyph names */ |
| if ( !cff->charset.sids ) |
| return -1; |
| |
| /* check range of standard char code */ |
| if ( charcode < 0 || charcode > 255 ) |
| return -1; |
| |
| /* Get code to SID mapping from `cff_standard_encoding'. */ |
| glyph_sid = cff_get_standard_encoding( (FT_UInt)charcode ); |
| |
| for ( n = 0; n < cff->num_glyphs; n++ ) |
| { |
| if ( cff->charset.sids[n] == glyph_sid ) |
| return n; |
| } |
| |
| return -1; |
| } |
| |
| |
| static FT_Error |
| cff_get_glyph_data( TT_Face face, |
| FT_UInt glyph_index, |
| FT_Byte** pointer, |
| FT_ULong* length ) |
| { |
| #ifdef FT_CONFIG_OPTION_INCREMENTAL |
| /* For incremental fonts get the character data using the */ |
| /* callback function. */ |
| if ( face->root.internal->incremental_interface ) |
| { |
| FT_Data data; |
| FT_Error error = |
| face->root.internal->incremental_interface->funcs->get_glyph_data( |
| face->root.internal->incremental_interface->object, |
| glyph_index, &data ); |
| |
| |
| *pointer = (FT_Byte*)data.pointer; |
| *length = data.length; |
| |
| return error; |
| } |
| else |
| #endif /* FT_CONFIG_OPTION_INCREMENTAL */ |
| |
| { |
| CFF_Font cff = (CFF_Font)(face->extra.data); |
| |
| |
| return cff_index_access_element( &cff->charstrings_index, glyph_index, |
| pointer, length ); |
| } |
| } |
| |
| |
| static void |
| cff_free_glyph_data( TT_Face face, |
| FT_Byte** pointer, |
| FT_ULong length ) |
| { |
| #ifndef FT_CONFIG_OPTION_INCREMENTAL |
| FT_UNUSED( length ); |
| #endif |
| |
| #ifdef FT_CONFIG_OPTION_INCREMENTAL |
| /* For incremental fonts get the character data using the */ |
| /* callback function. */ |
| if ( face->root.internal->incremental_interface ) |
| { |
| FT_Data data; |
| |
| |
| data.pointer = *pointer; |
| data.length = length; |
| |
| face->root.internal->incremental_interface->funcs->free_glyph_data( |
| face->root.internal->incremental_interface->object,&data ); |
| } |
| else |
| #endif /* FT_CONFIG_OPTION_INCREMENTAL */ |
| |
| { |
| CFF_Font cff = (CFF_Font)(face->extra.data); |
| |
| |
| cff_index_forget_element( &cff->charstrings_index, pointer ); |
| } |
| } |
| |
| |
| static FT_Error |
| cff_operator_seac( CFF_Decoder* decoder, |
| FT_Pos adx, |
| FT_Pos ady, |
| FT_Int bchar, |
| FT_Int achar ) |
| { |
| FT_Error error; |
| CFF_Builder* builder = &decoder->builder; |
| FT_Int bchar_index, achar_index; |
| TT_Face face = decoder->builder.face; |
| FT_Vector left_bearing, advance; |
| FT_Byte* charstring; |
| FT_ULong charstring_len; |
| |
| |
| #ifdef FT_CONFIG_OPTION_INCREMENTAL |
| /* Incremental fonts don't necessarily have valid charsets. */ |
| /* They use the character code, not the glyph index, in this case. */ |
| if ( face->root.internal->incremental_interface ) |
| { |
| bchar_index = bchar; |
| achar_index = achar; |
| } |
| else |
| #endif /* FT_CONFIG_OPTION_INCREMENTAL */ |
| { |
| CFF_Font cff = (CFF_Font)(face->extra.data); |
| |
| |
| bchar_index = cff_lookup_glyph_by_stdcharcode( cff, bchar ); |
| achar_index = cff_lookup_glyph_by_stdcharcode( cff, achar ); |
| } |
| |
| if ( bchar_index < 0 || achar_index < 0 ) |
| { |
| FT_ERROR(( "cff_operator_seac:" )); |
| FT_ERROR(( " invalid seac character code arguments\n" )); |
| return CFF_Err_Syntax_Error; |
| } |
| |
| /* If we are trying to load a composite glyph, do not load the */ |
| /* accent character and return the array of subglyphs. */ |
| if ( builder->no_recurse ) |
| { |
| FT_GlyphSlot glyph = (FT_GlyphSlot)builder->glyph; |
| FT_GlyphLoader loader = glyph->internal->loader; |
| FT_SubGlyph subg; |
| |
| |
| /* reallocate subglyph array if necessary */ |
| error = FT_GlyphLoader_CheckSubGlyphs( loader, 2 ); |
| if ( error ) |
| goto Exit; |
| |
| subg = loader->current.subglyphs; |
| |
| /* subglyph 0 = base character */ |
| subg->index = bchar_index; |
| subg->flags = FT_SUBGLYPH_FLAG_ARGS_ARE_XY_VALUES | |
| FT_SUBGLYPH_FLAG_USE_MY_METRICS; |
| subg->arg1 = 0; |
| subg->arg2 = 0; |
| subg++; |
| |
| /* subglyph 1 = accent character */ |
| subg->index = achar_index; |
| subg->flags = FT_SUBGLYPH_FLAG_ARGS_ARE_XY_VALUES; |
| subg->arg1 = (FT_Int)( adx >> 16 ); |
| subg->arg2 = (FT_Int)( ady >> 16 ); |
| |
| /* set up remaining glyph fields */ |
| glyph->num_subglyphs = 2; |
| glyph->subglyphs = loader->base.subglyphs; |
| glyph->format = FT_GLYPH_FORMAT_COMPOSITE; |
| |
| loader->current.num_subglyphs = 2; |
| } |
| |
| FT_GlyphLoader_Prepare( builder->loader ); |
| |
| /* First load `bchar' in builder */ |
| error = cff_get_glyph_data( face, bchar_index, |
| &charstring, &charstring_len ); |
| if ( !error ) |
| { |
| error = cff_decoder_parse_charstrings( decoder, charstring, |
| charstring_len ); |
| |
| if ( error ) |
| goto Exit; |
| |
| cff_free_glyph_data( face, &charstring, charstring_len ); |
| } |
| |
| /* Save the left bearing and width of the base character */ |
| /* as they will be erased by the next load. */ |
| |
| left_bearing = builder->left_bearing; |
| advance = builder->advance; |
| |
| builder->left_bearing.x = 0; |
| builder->left_bearing.y = 0; |
| |
| builder->pos_x = adx; |
| builder->pos_y = ady; |
| |
| /* Now load `achar' on top of the base outline. */ |
| error = cff_get_glyph_data( face, achar_index, |
| &charstring, &charstring_len ); |
| if ( !error ) |
| { |
| error = cff_decoder_parse_charstrings( decoder, charstring, |
| charstring_len ); |
| |
| if ( error ) |
| goto Exit; |
| |
| cff_free_glyph_data( face, &charstring, charstring_len ); |
| } |
| |
| /* Restore the left side bearing and advance width */ |
| /* of the base character. */ |
| builder->left_bearing = left_bearing; |
| builder->advance = advance; |
| |
| builder->pos_x = 0; |
| builder->pos_y = 0; |
| |
| Exit: |
| return error; |
| } |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* <Function> */ |
| /* cff_decoder_parse_charstrings */ |
| /* */ |
| /* <Description> */ |
| /* Parses a given Type 2 charstrings program. */ |
| /* */ |
| /* <InOut> */ |
| /* decoder :: The current Type 1 decoder. */ |
| /* */ |
| /* <Input> */ |
| /* charstring_base :: The base of the charstring stream. */ |
| /* */ |
| /* charstring_len :: The length in bytes of the charstring stream. */ |
| /* */ |
| /* <Return> */ |
| /* FreeType error code. 0 means success. */ |
| /* */ |
| FT_LOCAL_DEF( FT_Error ) |
| cff_decoder_parse_charstrings( CFF_Decoder* decoder, |
| FT_Byte* charstring_base, |
| FT_ULong charstring_len ) |
| { |
| FT_Error error; |
| CFF_Decoder_Zone* zone; |
| FT_Byte* ip; |
| FT_Byte* limit; |
| CFF_Builder* builder = &decoder->builder; |
| FT_Pos x, y; |
| FT_Fixed seed; |
| FT_Fixed* stack; |
| |
| T2_Hints_Funcs hinter; |
| |
| |
| /* set default width */ |
| decoder->num_hints = 0; |
| decoder->read_width = 1; |
| |
| /* compute random seed from stack address of parameter */ |
| seed = (FT_Fixed)(char*)&seed ^ |
| (FT_Fixed)(char*)&decoder ^ |
| (FT_Fixed)(char*)&charstring_base; |
| seed = ( seed ^ ( seed >> 10 ) ^ ( seed >> 20 ) ) & 0xFFFFL; |
| if ( seed == 0 ) |
| seed = 0x7384; |
| |
| /* initialize the decoder */ |
| decoder->top = decoder->stack; |
| decoder->zone = decoder->zones; |
| zone = decoder->zones; |
| stack = decoder->top; |
| |
| hinter = (T2_Hints_Funcs)builder->hints_funcs; |
| |
| builder->path_begun = 0; |
| |
| zone->base = charstring_base; |
| limit = zone->limit = charstring_base + charstring_len; |
| ip = zone->cursor = zone->base; |
| |
| error = CFF_Err_Ok; |
| |
| x = builder->pos_x; |
| y = builder->pos_y; |
| |
| /* begin hints recording session, if any */ |
| if ( hinter ) |
| hinter->open( hinter->hints ); |
| |
| /* now execute loop */ |
| while ( ip < limit ) |
| { |
| CFF_Operator op; |
| FT_Byte v; |
| |
| |
| /********************************************************************/ |
| /* */ |
| /* Decode operator or operand */ |
| /* */ |
| v = *ip++; |
| if ( v >= 32 || v == 28 ) |
| { |
| FT_Int shift = 16; |
| FT_Int32 val; |
| |
| |
| /* this is an operand, push it on the stack */ |
| if ( v == 28 ) |
| { |
| if ( ip + 1 >= limit ) |
| goto Syntax_Error; |
| val = (FT_Short)( ( (FT_Short)ip[0] << 8 ) | ip[1] ); |
| ip += 2; |
| } |
| else if ( v < 247 ) |
| val = (FT_Long)v - 139; |
| else if ( v < 251 ) |
| { |
| if ( ip >= limit ) |
| goto Syntax_Error; |
| val = ( (FT_Long)v - 247 ) * 256 + *ip++ + 108; |
| } |
| else if ( v < 255 ) |
| { |
| if ( ip >= limit ) |
| goto Syntax_Error; |
| val = -( (FT_Long)v - 251 ) * 256 - *ip++ - 108; |
| } |
| else |
| { |
| if ( ip + 3 >= limit ) |
| goto Syntax_Error; |
| val = ( (FT_Int32)ip[0] << 24 ) | |
| ( (FT_Int32)ip[1] << 16 ) | |
| ( (FT_Int32)ip[2] << 8 ) | |
| ip[3]; |
| ip += 4; |
| shift = 0; |
| } |
| if ( decoder->top - stack >= CFF_MAX_OPERANDS ) |
| goto Stack_Overflow; |
| |
| val <<= shift; |
| *decoder->top++ = val; |
| |
| #ifdef FT_DEBUG_LEVEL_TRACE |
| if ( !( val & 0xFFFFL ) ) |
| FT_TRACE4(( " %ld", (FT_Int32)( val >> 16 ) )); |
| else |
| FT_TRACE4(( " %.2f", val / 65536.0 )); |
| #endif |
| |
| } |
| else |
| { |
| /* The specification says that normally arguments are to be taken */ |
| /* from the bottom of the stack. However, this seems not to be */ |
| /* correct, at least for Acroread 7.0.8 on GNU/Linux: It pops the */ |
| /* arguments similar to a PS interpreter. */ |
| |
| FT_Fixed* args = decoder->top; |
| FT_Int num_args = (FT_Int)( args - decoder->stack ); |
| FT_Int req_args; |
| |
| |
| /* find operator */ |
| op = cff_op_unknown; |
| |
| switch ( v ) |
| { |
| case 1: |
| op = cff_op_hstem; |
| break; |
| case 3: |
| op = cff_op_vstem; |
| break; |
| case 4: |
| op = cff_op_vmoveto; |
| break; |
| case 5: |
| op = cff_op_rlineto; |
| break; |
| case 6: |
| op = cff_op_hlineto; |
| break; |
| case 7: |
| op = cff_op_vlineto; |
| break; |
| case 8: |
| op = cff_op_rrcurveto; |
| break; |
| case 9: |
| op = cff_op_closepath; |
| break; |
| case 10: |
| op = cff_op_callsubr; |
| break; |
| case 11: |
| op = cff_op_return; |
| break; |
| case 12: |
| { |
| if ( ip >= limit ) |
| goto Syntax_Error; |
| v = *ip++; |
| |
| switch ( v ) |
| { |
| case 0: |
| op = cff_op_dotsection; |
| break; |
| case 3: |
| op = cff_op_and; |
| break; |
| case 4: |
| op = cff_op_or; |
| break; |
| case 5: |
| op = cff_op_not; |
| break; |
| case 8: |
| op = cff_op_store; |
| break; |
| case 9: |
| op = cff_op_abs; |
| break; |
| case 10: |
| op = cff_op_add; |
| break; |
| case 11: |
| op = cff_op_sub; |
| break; |
| case 12: |
| op = cff_op_div; |
| break; |
| case 13: |
| op = cff_op_load; |
| break; |
| case 14: |
| op = cff_op_neg; |
| break; |
| case 15: |
| op = cff_op_eq; |
| break; |
| case 16: |
| op = cff_op_callothersubr; |
| break; |
| case 17: |
| op = cff_op_pop; |
| break; |
| case 18: |
| op = cff_op_drop; |
| break; |
| case 20: |
| op = cff_op_put; |
| break; |
| case 21: |
| op = cff_op_get; |
| break; |
| case 22: |
| op = cff_op_ifelse; |
| break; |
| case 23: |
| op = cff_op_random; |
| break; |
| case 24: |
| op = cff_op_mul; |
| break; |
| case 26: |
| op = cff_op_sqrt; |
| break; |
| case 27: |
| op = cff_op_dup; |
| break; |
| case 28: |
| op = cff_op_exch; |
| break; |
| case 29: |
| op = cff_op_index; |
| break; |
| case 30: |
| op = cff_op_roll; |
| break; |
| case 34: |
| op = cff_op_hflex; |
| break; |
| case 35: |
| op = cff_op_flex; |
| break; |
| case 36: |
| op = cff_op_hflex1; |
| break; |
| case 37: |
| op = cff_op_flex1; |
| break; |
| default: |
| /* decrement ip for syntax error message */ |
| ip--; |
| } |
| } |
| break; |
| case 13: |
| op = cff_op_hsbw; |
| break; |
| case 14: |
| op = cff_op_endchar; |
| break; |
| case 16: |
| op = cff_op_blend; |
| break; |
| case 18: |
| op = cff_op_hstemhm; |
| break; |
| case 19: |
| op = cff_op_hintmask; |
| break; |
| case 20: |
| op = cff_op_cntrmask; |
| break; |
| case 21: |
| op = cff_op_rmoveto; |
| break; |
| case 22: |
| op = cff_op_hmoveto; |
| break; |
| case 23: |
| op = cff_op_vstemhm; |
| break; |
| case 24: |
| op = cff_op_rcurveline; |
| break; |
| case 25: |
| op = cff_op_rlinecurve; |
| break; |
| case 26: |
| op = cff_op_vvcurveto; |
| break; |
| case 27: |
| op = cff_op_hhcurveto; |
| break; |
| case 29: |
| op = cff_op_callgsubr; |
| break; |
| case 30: |
| op = cff_op_vhcurveto; |
| break; |
| case 31: |
| op = cff_op_hvcurveto; |
| break; |
| default: |
| ; |
| } |
| |
| if ( op == cff_op_unknown ) |
| goto Syntax_Error; |
| |
| /* check arguments */ |
| req_args = cff_argument_counts[op]; |
| if ( req_args & CFF_COUNT_CHECK_WIDTH ) |
| { |
| if ( num_args > 0 && decoder->read_width ) |
| { |
| /* If `nominal_width' is non-zero, the number is really a */ |
| /* difference against `nominal_width'. Else, the number here */ |
| /* is truly a width, not a difference against `nominal_width'. */ |
| /* If the font does not set `nominal_width', then */ |
| /* `nominal_width' defaults to zero, and so we can set */ |
| /* `glyph_width' to `nominal_width' plus number on the stack */ |
| /* -- for either case. */ |
| |
| FT_Int set_width_ok; |
| |
| |
| switch ( op ) |
| { |
| case cff_op_hmoveto: |
| case cff_op_vmoveto: |
| set_width_ok = num_args & 2; |
| break; |
| |
| case cff_op_hstem: |
| case cff_op_vstem: |
| case cff_op_hstemhm: |
| case cff_op_vstemhm: |
| case cff_op_rmoveto: |
| case cff_op_hintmask: |
| case cff_op_cntrmask: |
| set_width_ok = num_args & 1; |
| break; |
| |
| case cff_op_endchar: |
| /* If there is a width specified for endchar, we either have */ |
| /* 1 argument or 5 arguments. We like to argue. */ |
| set_width_ok = ( num_args == 5 ) || ( num_args == 1 ); |
| break; |
| |
| default: |
| set_width_ok = 0; |
| break; |
| } |
| |
| if ( set_width_ok ) |
| { |
| decoder->glyph_width = decoder->nominal_width + |
| ( stack[0] >> 16 ); |
| |
| if ( decoder->width_only ) |
| { |
| /* we only want the advance width; stop here */ |
| break; |
| } |
| |
| /* Consumed an argument. */ |
| num_args--; |
| } |
| } |
| |
| decoder->read_width = 0; |
| req_args = 0; |
| } |
| |
| req_args &= 0x000F; |
| if ( num_args < req_args ) |
| goto Stack_Underflow; |
| args -= req_args; |
| num_args -= req_args; |
| |
| /* At this point, `args' points to the first argument of the */ |
| /* operand in case `req_args' isn't zero. Otherwise, we have */ |
| /* to adjust `args' manually. */ |
| |
| /* Note that we only pop arguments from the stack which we */ |
| /* really need and can digest so that we can continue in case */ |
| /* of superfluous stack elements. */ |
| |
| switch ( op ) |
| { |
| case cff_op_hstem: |
| case cff_op_vstem: |
| case cff_op_hstemhm: |
| case cff_op_vstemhm: |
| /* the number of arguments is always even here */ |
| FT_TRACE4(( |
| op == cff_op_hstem ? " hstem\n" : |
| ( op == cff_op_vstem ? " vstem\n" : |
| ( op == cff_op_hstemhm ? " hstemhm\n" : " vstemhm\n" ) ) )); |
| |
| if ( hinter ) |
| hinter->stems( hinter->hints, |
| ( op == cff_op_hstem || op == cff_op_hstemhm ), |
| num_args / 2, |
| args - ( num_args & ~1 ) ); |
| |
| decoder->num_hints += num_args / 2; |
| args = stack; |
| break; |
| |
| case cff_op_hintmask: |
| case cff_op_cntrmask: |
| FT_TRACE4(( op == cff_op_hintmask ? " hintmask" : " cntrmask" )); |
| |
| /* implement vstem when needed -- */ |
| /* the specification doesn't say it, but this also works */ |
| /* with the 'cntrmask' operator */ |
| /* */ |
| if ( num_args > 0 ) |
| { |
| if ( hinter ) |
| hinter->stems( hinter->hints, |
| 0, |
| num_args / 2, |
| args - ( num_args & ~1 ) ); |
| |
| decoder->num_hints += num_args / 2; |
| } |
| |
| if ( hinter ) |
| { |
| if ( op == cff_op_hintmask ) |
| hinter->hintmask( hinter->hints, |
| builder->current->n_points, |
| decoder->num_hints, |
| ip ); |
| else |
| hinter->counter( hinter->hints, |
| decoder->num_hints, |
| ip ); |
| } |
| |
| #ifdef FT_DEBUG_LEVEL_TRACE |
| { |
| FT_UInt maskbyte; |
| |
| |
| FT_TRACE4(( " (maskbytes: " )); |
| |
| for ( maskbyte = 0; |
| maskbyte < (FT_UInt)(( decoder->num_hints + 7 ) >> 3); |
| maskbyte++, ip++ ) |
| FT_TRACE4(( "0x%02X", *ip )); |
| |
| FT_TRACE4(( ")\n" )); |
| } |
| #else |
| ip += ( decoder->num_hints + 7 ) >> 3; |
| #endif |
| if ( ip >= limit ) |
| goto Syntax_Error; |
| args = stack; |
| break; |
| |
| case cff_op_rmoveto: |
| FT_TRACE4(( " rmoveto\n" )); |
| |
| cff_builder_close_contour( builder ); |
| builder->path_begun = 0; |
| x += args[-2]; |
| y += args[-1]; |
| args = stack; |
| break; |
| |
| case cff_op_vmoveto: |
| FT_TRACE4(( " vmoveto\n" )); |
| |
| cff_builder_close_contour( builder ); |
| builder->path_begun = 0; |
| y += args[-1]; |
| args = stack; |
| break; |
| |
| case cff_op_hmoveto: |
| FT_TRACE4(( " hmoveto\n" )); |
| |
| cff_builder_close_contour( builder ); |
| builder->path_begun = 0; |
| x += args[-1]; |
| args = stack; |
| break; |
| |
| case cff_op_rlineto: |
| FT_TRACE4(( " rlineto\n" )); |
| |
| if ( cff_builder_start_point ( builder, x, y ) || |
| check_points( builder, num_args / 2 ) ) |
| goto Fail; |
| |
| if ( num_args < 2 ) |
| goto Stack_Underflow; |
| |
| args -= num_args & ~1; |
| while ( args < decoder->top ) |
| { |
| x += args[0]; |
| y += args[1]; |
| cff_builder_add_point( builder, x, y, 1 ); |
| args += 2; |
| } |
| args = stack; |
| break; |
| |
| case cff_op_hlineto: |
| case cff_op_vlineto: |
| { |
| FT_Int phase = ( op == cff_op_hlineto ); |
| |
| |
| FT_TRACE4(( op == cff_op_hlineto ? " hlineto\n" |
| : " vlineto\n" )); |
| |
| if ( num_args < 1 ) |
| goto Stack_Underflow; |
| |
| if ( cff_builder_start_point ( builder, x, y ) || |
| check_points( builder, num_args ) ) |
| goto Fail; |
| |
| args = stack; |
| while ( args < decoder->top ) |
| { |
| if ( phase ) |
| x += args[0]; |
| else |
| y += args[0]; |
| |
| if ( cff_builder_add_point1( builder, x, y ) ) |
| goto Fail; |
| |
| args++; |
| phase ^= 1; |
| } |
| args = stack; |
| } |
| break; |
| |
| case cff_op_rrcurveto: |
| { |
| FT_Int nargs; |
| |
| |
| FT_TRACE4(( " rrcurveto\n" )); |
| |
| if ( num_args < 6 ) |
| goto Stack_Underflow; |
| |
| nargs = num_args - num_args % 6; |
| |
| if ( cff_builder_start_point ( builder, x, y ) || |
| check_points( builder, nargs / 2 ) ) |
| goto Fail; |
| |
| args -= nargs; |
| while ( args < decoder->top ) |
| { |
| x += args[0]; |
| y += args[1]; |
| cff_builder_add_point( builder, x, y, 0 ); |
| x += args[2]; |
| y += args[3]; |
| cff_builder_add_point( builder, x, y, 0 ); |
| x += args[4]; |
| y += args[5]; |
| cff_builder_add_point( builder, x, y, 1 ); |
| args += 6; |
| } |
| args = stack; |
| } |
| break; |
| |
| case cff_op_vvcurveto: |
| { |
| FT_Int nargs; |
| |
| |
| FT_TRACE4(( " vvcurveto\n" )); |
| |
| if ( num_args < 4 ) |
| goto Stack_Underflow; |
| |
| /* if num_args isn't of the form 4n or 4n+1, */ |
| /* we reduce it to 4n+1 */ |
| |
| nargs = num_args - num_args % 4; |
| if ( num_args - nargs > 0 ) |
| nargs += 1; |
| |
| if ( cff_builder_start_point( builder, x, y ) ) |
| goto Fail; |
| |
| args -= nargs; |
| |
| if ( nargs & 1 ) |
| { |
| x += args[0]; |
| args++; |
| nargs--; |
| } |
| |
| if ( check_points( builder, 3 * ( nargs / 4 ) ) ) |
| goto Fail; |
| |
| while ( args < decoder->top ) |
| { |
| y += args[0]; |
| cff_builder_add_point( builder, x, y, 0 ); |
| x += args[1]; |
| y += args[2]; |
| cff_builder_add_point( builder, x, y, 0 ); |
| y += args[3]; |
| cff_builder_add_point( builder, x, y, 1 ); |
| args += 4; |
| } |
| args = stack; |
| } |
| break; |
| |
| case cff_op_hhcurveto: |
| { |
| FT_Int nargs; |
| |
| |
| FT_TRACE4(( " hhcurveto\n" )); |
| |
| if ( num_args < 4 ) |
| goto Stack_Underflow; |
| |
| /* if num_args isn't of the form 4n or 4n+1, */ |
| /* we reduce it to 4n+1 */ |
| |
| nargs = num_args - num_args % 4; |
| if ( num_args - nargs > 0 ) |
| nargs += 1; |
| |
| if ( cff_builder_start_point( builder, x, y ) ) |
| goto Fail; |
| |
| args -= nargs; |
| if ( nargs & 1 ) |
| { |
| y += args[0]; |
| args++; |
| nargs--; |
| } |
| |
| if ( check_points( builder, 3 * ( nargs / 4 ) ) ) |
| goto Fail; |
| |
| while ( args < decoder->top ) |
| { |
| x += args[0]; |
| cff_builder_add_point( builder, x, y, 0 ); |
| x += args[1]; |
| y += args[2]; |
| cff_builder_add_point( builder, x, y, 0 ); |
| x += args[3]; |
| cff_builder_add_point( builder, x, y, 1 ); |
| args += 4; |
| } |
| args = stack; |
| } |
| break; |
| |
| case cff_op_vhcurveto: |
| case cff_op_hvcurveto: |
| { |
| FT_Int phase; |
| FT_Int nargs; |
| |
| |
| FT_TRACE4(( op == cff_op_vhcurveto ? " vhcurveto\n" |
| : " hvcurveto\n" )); |
| |
| if ( cff_builder_start_point( builder, x, y ) ) |
| goto Fail; |
| |
| if ( num_args < 4 ) |
| goto Stack_Underflow; |
| |
| /* if num_args isn't of the form 8n, 8n+1, 8n+4, or 8n+5, */ |
| /* we reduce it to the largest one which fits */ |
| |
| nargs = num_args - num_args % 4; |
| if ( num_args - nargs > 0 ) |
| nargs += 1; |
| |
| args -= nargs; |
| if ( check_points( builder, ( nargs / 4 ) * 3 ) ) |
| goto Stack_Underflow; |
| |
| phase = ( op == cff_op_hvcurveto ); |
| |
| while ( nargs >= 4 ) |
| { |
| nargs -= 4; |
| if ( phase ) |
| { |
| x += args[0]; |
| cff_builder_add_point( builder, x, y, 0 ); |
| x += args[1]; |
| y += args[2]; |
| cff_builder_add_point( builder, x, y, 0 ); |
| y += args[3]; |
| if ( nargs == 1 ) |
| x += args[4]; |
| cff_builder_add_point( builder, x, y, 1 ); |
| } |
| else |
| { |
| y += args[0]; |
| cff_builder_add_point( builder, x, y, 0 ); |
| x += args[1]; |
| y += args[2]; |
| cff_builder_add_point( builder, x, y, 0 ); |
| x += args[3]; |
| if ( nargs == 1 ) |
| y += args[4]; |
| cff_builder_add_point( builder, x, y, 1 ); |
| } |
| args += 4; |
| phase ^= 1; |
| } |
| args = stack; |
| } |
| break; |
| |
| case cff_op_rlinecurve: |
| { |
| FT_Int num_lines; |
| FT_Int nargs; |
| |
| |
| FT_TRACE4(( " rlinecurve\n" )); |
| |
| if ( num_args < 8 ) |
| goto Stack_Underflow; |
| |
| nargs = num_args & ~1; |
| num_lines = ( nargs - 6 ) / 2; |
| |
| if ( cff_builder_start_point( builder, x, y ) || |
| check_points( builder, num_lines + 3 ) ) |
| goto Fail; |
| |
| args -= nargs; |
| |
| /* first, add the line segments */ |
| while ( num_lines > 0 ) |
| { |
| x += args[0]; |
| y += args[1]; |
| cff_builder_add_point( builder, x, y, 1 ); |
| args += 2; |
| num_lines--; |
| } |
| |
| /* then the curve */ |
| x += args[0]; |
| y += args[1]; |
| cff_builder_add_point( builder, x, y, 0 ); |
| x += args[2]; |
| y += args[3]; |
| cff_builder_add_point( builder, x, y, 0 ); |
| x += args[4]; |
| y += args[5]; |
| cff_builder_add_point( builder, x, y, 1 ); |
| args = stack; |
| } |
| break; |
| |
| case cff_op_rcurveline: |
| { |
| FT_Int num_curves; |
| FT_Int nargs; |
| |
| |
| FT_TRACE4(( " rcurveline\n" )); |
| |
| if ( num_args < 8 ) |
| goto Stack_Underflow; |
| |
| nargs = num_args - 2; |
| nargs = nargs - nargs % 6 + 2; |
| num_curves = ( nargs - 2 ) / 6; |
| |
| if ( cff_builder_start_point ( builder, x, y ) || |
| check_points( builder, num_curves * 3 + 2 ) ) |
| goto Fail; |
| |
| args -= nargs; |
| |
| /* first, add the curves */ |
| while ( num_curves > 0 ) |
| { |
| x += args[0]; |
| y += args[1]; |
| cff_builder_add_point( builder, x, y, 0 ); |
| x += args[2]; |
| y += args[3]; |
| cff_builder_add_point( builder, x, y, 0 ); |
| x += args[4]; |
| y += args[5]; |
| cff_builder_add_point( builder, x, y, 1 ); |
| args += 6; |
| num_curves--; |
| } |
| |
| /* then the final line */ |
| x += args[0]; |
| y += args[1]; |
| cff_builder_add_point( builder, x, y, 1 ); |
| args = stack; |
| } |
| break; |
| |
| case cff_op_hflex1: |
| { |
| FT_Pos start_y; |
| |
| |
| FT_TRACE4(( " hflex1\n" )); |
| |
| /* adding five more points: 4 control points, 1 on-curve point */ |
| /* -- make sure we have enough space for the start point if it */ |
| /* needs to be added */ |
| if ( cff_builder_start_point( builder, x, y ) || |
| check_points( builder, 6 ) ) |
| goto Fail; |
| |
| /* record the starting point's y position for later use */ |
| start_y = y; |
| |
| /* first control point */ |
| x += args[0]; |
| y += args[1]; |
| cff_builder_add_point( builder, x, y, 0 ); |
| |
| /* second control point */ |
| x += args[2]; |
| y += args[3]; |
| cff_builder_add_point( builder, x, y, 0 ); |
| |
| /* join point; on curve, with y-value the same as the last */ |
| /* control point's y-value */ |
| x += args[4]; |
| cff_builder_add_point( builder, x, y, 1 ); |
| |
| /* third control point, with y-value the same as the join */ |
| /* point's y-value */ |
| x += args[5]; |
| cff_builder_add_point( builder, x, y, 0 ); |
| |
| /* fourth control point */ |
| x += args[6]; |
| y += args[7]; |
| cff_builder_add_point( builder, x, y, 0 ); |
| |
| /* ending point, with y-value the same as the start */ |
| x += args[8]; |
| y = start_y; |
| cff_builder_add_point( builder, x, y, 1 ); |
| |
| args = stack; |
| break; |
| } |
| |
| case cff_op_hflex: |
| { |
| FT_Pos start_y; |
| |
| |
| FT_TRACE4(( " hflex\n" )); |
| |
| /* adding six more points; 4 control points, 2 on-curve points */ |
| if ( cff_builder_start_point( builder, x, y ) || |
| check_points( builder, 6 ) ) |
| goto Fail; |
| |
| /* record the starting point's y-position for later use */ |
| start_y = y; |
| |
| /* first control point */ |
| x += args[0]; |
| cff_builder_add_point( builder, x, y, 0 ); |
| |
| /* second control point */ |
| x += args[1]; |
| y += args[2]; |
| cff_builder_add_point( builder, x, y, 0 ); |
| |
| /* join point; on curve, with y-value the same as the last */ |
| /* control point's y-value */ |
| x += args[3]; |
| cff_builder_add_point( builder, x, y, 1 ); |
| |
| /* third control point, with y-value the same as the join */ |
| /* point's y-value */ |
| x += args[4]; |
| cff_builder_add_point( builder, x, y, 0 ); |
| |
| /* fourth control point */ |
| x += args[5]; |
| y = start_y; |
| cff_builder_add_point( builder, x, y, 0 ); |
| |
| /* ending point, with y-value the same as the start point's */ |
| /* y-value -- we don't add this point, though */ |
| x += args[6]; |
| cff_builder_add_point( builder, x, y, 1 ); |
| |
| args = stack; |
| break; |
| } |
| |
| case cff_op_flex1: |
| { |
| FT_Pos start_x, start_y; /* record start x, y values for */ |
| /* alter use */ |
| FT_Fixed dx = 0, dy = 0; /* used in horizontal/vertical */ |
| /* algorithm below */ |
| FT_Int horizontal, count; |
| FT_Fixed* temp; |
| |
| |
| FT_TRACE4(( " flex1\n" )); |
| |
| /* adding six more points; 4 control points, 2 on-curve points */ |
| if ( cff_builder_start_point( builder, x, y ) || |
| check_points( builder, 6 ) ) |
| goto Fail; |
| |
| /* record the starting point's x, y position for later use */ |
| start_x = x; |
| start_y = y; |
| |
| /* XXX: figure out whether this is supposed to be a horizontal */ |
| /* or vertical flex; the Type 2 specification is vague... */ |
| |
| temp = args; |
| |
| /* grab up to the last argument */ |
| for ( count = 5; count > 0; count-- ) |
| { |
| dx += temp[0]; |
| dy += temp[1]; |
| temp += 2; |
| } |
| |
| if ( dx < 0 ) |
| dx = -dx; |
| if ( dy < 0 ) |
| dy = -dy; |
| |
| /* strange test, but here it is... */ |
| horizontal = ( dx > dy ); |
| |
| for ( count = 5; count > 0; count-- ) |
| { |
| x += args[0]; |
| y += args[1]; |
| cff_builder_add_point( builder, x, y, |
| (FT_Bool)( count == 3 ) ); |
| args += 2; |
| } |
| |
| /* is last operand an x- or y-delta? */ |
| if ( horizontal ) |
| { |
| x += args[0]; |
| y = start_y; |
| } |
| else |
| { |
| x = start_x; |
| y += args[0]; |
| } |
| |
| cff_builder_add_point( builder, x, y, 1 ); |
| |
| args = stack; |
| break; |
| } |
| |
| case cff_op_flex: |
| { |
| FT_UInt count; |
| |
| |
| FT_TRACE4(( " flex\n" )); |
| |
| if ( cff_builder_start_point( builder, x, y ) || |
| check_points( builder, 6 ) ) |
| goto Fail; |
| |
| for ( count = 6; count > 0; count-- ) |
| { |
| x += args[0]; |
| y += args[1]; |
| cff_builder_add_point( builder, x, y, |
| (FT_Bool)( count == 4 || count == 1 ) ); |
| args += 2; |
| } |
| |
| args = stack; |
| } |
| break; |
| |
| case cff_op_endchar: |
| FT_TRACE4(( " endchar\n" )); |
| |
| /* We are going to emulate the seac operator. */ |
| if ( num_args >= 4 ) |
| { |
| /* Save glyph width so that the subglyphs don't overwrite it. */ |
| FT_Pos glyph_width = decoder->glyph_width; |
| |
| |
| error = cff_operator_seac( decoder, |
| args[-4], |
| args[-3], |
| (FT_Int)( args[-2] >> 16 ), |
| (FT_Int)( args[-1] >> 16 ) ); |
| |
| decoder->glyph_width = glyph_width; |
| } |
| else |
| { |
| if ( !error ) |
| error = CFF_Err_Ok; |
| |
| cff_builder_close_contour( builder ); |
| |
| /* close hints recording session */ |
| if ( hinter ) |
| { |
| if ( hinter->close( hinter->hints, |
| builder->current->n_points ) ) |
| goto Syntax_Error; |
| |
| /* apply hints to the loaded glyph outline now */ |
| hinter->apply( hinter->hints, |
| builder->current, |
| (PSH_Globals)builder->hints_globals, |
| decoder->hint_mode ); |
| } |
| |
| /* add current outline to the glyph slot */ |
| FT_GlyphLoader_Add( builder->loader ); |
| } |
| |
| /* return now! */ |
| FT_TRACE4(( "\n" )); |
| return error; |
| |
| case cff_op_abs: |
| FT_TRACE4(( " abs\n" )); |
| |
| if ( args[0] < 0 ) |
| args[0] = -args[0]; |
| args++; |
| break; |
| |
| case cff_op_add: |
| FT_TRACE4(( " add\n" )); |
| |
| args[0] += args[1]; |
| args++; |
| break; |
| |
| case cff_op_sub: |
| FT_TRACE4(( " sub\n" )); |
| |
| args[0] -= args[1]; |
| args++; |
| break; |
| |
| case cff_op_div: |
| FT_TRACE4(( " div\n" )); |
| |
| args[0] = FT_DivFix( args[0], args[1] ); |
| args++; |
| break; |
| |
| case cff_op_neg: |
| FT_TRACE4(( " neg\n" )); |
| |
| args[0] = -args[0]; |
| args++; |
| break; |
| |
| case cff_op_random: |
| { |
| FT_Fixed Rand; |
| |
| |
| FT_TRACE4(( " rand\n" )); |
| |
| Rand = seed; |
| if ( Rand >= 0x8000L ) |
| Rand++; |
| |
| args[0] = Rand; |
| seed = FT_MulFix( seed, 0x10000L - seed ); |
| if ( seed == 0 ) |
| seed += 0x2873; |
| args++; |
| } |
| break; |
| |
| case cff_op_mul: |
| FT_TRACE4(( " mul\n" )); |
| |
| args[0] = FT_MulFix( args[0], args[1] ); |
| args++; |
| break; |
| |
| case cff_op_sqrt: |
| FT_TRACE4(( " sqrt\n" )); |
| |
| if ( args[0] > 0 ) |
| { |
| FT_Int count = 9; |
| FT_Fixed root = args[0]; |
| FT_Fixed new_root; |
| |
| |
| for (;;) |
| { |
| new_root = ( root + FT_DivFix( args[0], root ) + 1 ) >> 1; |
| if ( new_root == root || count <= 0 ) |
| break; |
| root = new_root; |
| } |
| args[0] = new_root; |
| } |
| else |
| args[0] = 0; |
| args++; |
| break; |
| |
| case cff_op_drop: |
| /* nothing */ |
| FT_TRACE4(( " drop\n" )); |
| |
| break; |
| |
| case cff_op_exch: |
| { |
| FT_Fixed tmp; |
| |
| |
| FT_TRACE4(( " exch\n" )); |
| |
| tmp = args[0]; |
| args[0] = args[1]; |
| args[1] = tmp; |
| args += 2; |
| } |
| break; |
| |
| case cff_op_index: |
| { |
| FT_Int idx = (FT_Int)( args[0] >> 16 ); |
| |
| |
| FT_TRACE4(( " index\n" )); |
| |
| if ( idx < 0 ) |
| idx = 0; |
| else if ( idx > num_args - 2 ) |
| idx = num_args - 2; |
| args[0] = args[-( idx + 1 )]; |
| args++; |
| } |
| break; |
| |
| case cff_op_roll: |
| { |
| FT_Int count = (FT_Int)( args[0] >> 16 ); |
| FT_Int idx = (FT_Int)( args[1] >> 16 ); |
| |
| |
| FT_TRACE4(( " roll\n" )); |
| |
| if ( count <= 0 ) |
| count = 1; |
| |
| args -= count; |
| if ( args < stack ) |
| goto Stack_Underflow; |
| |
| if ( idx >= 0 ) |
| { |
| while ( idx > 0 ) |
| { |
| FT_Fixed tmp = args[count - 1]; |
| FT_Int i; |
| |
| |
| for ( i = count - 2; i >= 0; i-- ) |
| args[i + 1] = args[i]; |
| args[0] = tmp; |
| idx--; |
| } |
| } |
| else |
| { |
| while ( idx < 0 ) |
| { |
| FT_Fixed tmp = args[0]; |
| FT_Int i; |
| |
| |
| for ( i = 0; i < count - 1; i++ ) |
| args[i] = args[i + 1]; |
| args[count - 1] = tmp; |
| idx++; |
| } |
| } |
| args += count; |
| } |
| break; |
| |
| case cff_op_dup: |
| FT_TRACE4(( " dup\n" )); |
| |
| args[1] = args[0]; |
| args++; |
| break; |
| |
| case cff_op_put: |
| { |
| FT_Fixed val = args[0]; |
| FT_Int idx = (FT_Int)( args[1] >> 16 ); |
| |
| |
| FT_TRACE4(( " put\n" )); |
| |
| if ( idx >= 0 && idx < decoder->len_buildchar ) |
| decoder->buildchar[idx] = val; |
| } |
| break; |
| |
| case cff_op_get: |
| { |
| FT_Int idx = (FT_Int)( args[0] >> 16 ); |
| FT_Fixed val = 0; |
| |
| |
| FT_TRACE4(( " get\n" )); |
| |
| if ( idx >= 0 && idx < decoder->len_buildchar ) |
| val = decoder->buildchar[idx]; |
| |
| args[0] = val; |
| args++; |
| } |
| break; |
| |
| case cff_op_store: |
| FT_TRACE4(( " store\n")); |
| |
| goto Unimplemented; |
| |
| case cff_op_load: |
| FT_TRACE4(( " load\n" )); |
| |
| goto Unimplemented; |
| |
| case cff_op_dotsection: |
| /* this operator is deprecated and ignored by the parser */ |
| FT_TRACE4(( " dotsection\n" )); |
| break; |
| |
| case cff_op_closepath: |
| /* this is an invalid Type 2 operator; however, there */ |
| /* exist fonts which are incorrectly converted from probably */ |
| /* Type 1 to CFF, and some parsers seem to accept it */ |
| |
| FT_TRACE4(( " closepath (invalid op)\n" )); |
| |
| args = stack; |
| break; |
| |
| case cff_op_hsbw: |
| /* this is an invalid Type 2 operator; however, there */ |
| /* exist fonts which are incorrectly converted from probably */ |
| /* Type 1 to CFF, and some parsers seem to accept it */ |
| |
| FT_TRACE4(( " hsbw (invalid op)\n" )); |
| |
| decoder->glyph_width = decoder->nominal_width + |
| (args[1] >> 16); |
| x = args[0]; |
| y = 0; |
| args = stack; |
| break; |
| |
| case cff_op_callothersubr: |
| /* this is an invalid Type 2 operator; however, there */ |
| /* exist fonts which are incorrectly converted from probably */ |
| /* Type 1 to CFF, and some parsers seem to accept it */ |
| |
| FT_TRACE4(( " callothersubr (invalid op)\n" )); |
| |
| /* don't modify stack; handle the subr as `unknown' so that */ |
| /* following `pop' operands use the arguments on stack */ |
| break; |
| |
| case cff_op_pop: |
| /* this is an invalid Type 2 operator; however, there */ |
| /* exist fonts which are incorrectly converted from probably */ |
| /* Type 1 to CFF, and some parsers seem to accept it */ |
| |
| FT_TRACE4(( " pop (invalid op)\n" )); |
| |
| args++; |
| break; |
| |
| case cff_op_and: |
| { |
| FT_Fixed cond = args[0] && args[1]; |
| |
| |
| FT_TRACE4(( " and\n" )); |
| |
| args[0] = cond ? 0x10000L : 0; |
| args++; |
| } |
| break; |
| |
| case cff_op_or: |
| { |
| FT_Fixed cond = args[0] || args[1]; |
| |
| |
| FT_TRACE4(( " or\n" )); |
| |
| args[0] = cond ? 0x10000L : 0; |
| args++; |
| } |
| break; |
| |
| case cff_op_eq: |
| { |
| FT_Fixed cond = !args[0]; |
| |
| |
| FT_TRACE4(( " eq\n" )); |
| |
| args[0] = cond ? 0x10000L : 0; |
| args++; |
| } |
| break; |
| |
| case cff_op_ifelse: |
| { |
| FT_Fixed cond = ( args[2] <= args[3] ); |
| |
| |
| FT_TRACE4(( " ifelse\n" )); |
| |
| if ( !cond ) |
| args[0] = args[1]; |
| args++; |
| } |
| break; |
| |
| case cff_op_callsubr: |
| { |
| FT_UInt idx = (FT_UInt)( ( args[0] >> 16 ) + |
| decoder->locals_bias ); |
| |
| |
| FT_TRACE4(( " callsubr(%d)\n", idx )); |
| |
| if ( idx >= decoder->num_locals ) |
| { |
| FT_ERROR(( "cff_decoder_parse_charstrings:" )); |
| FT_ERROR(( " invalid local subr index\n" )); |
| goto Syntax_Error; |
| } |
| |
| if ( zone - decoder->zones >= CFF_MAX_SUBRS_CALLS ) |
| { |
| FT_ERROR(( "cff_decoder_parse_charstrings:" |
| " too many nested subrs\n" )); |
| goto Syntax_Error; |
| } |
| |
| zone->cursor = ip; /* save current instruction pointer */ |
| |
| zone++; |
| zone->base = decoder->locals[idx]; |
| zone->limit = decoder->locals[idx + 1]; |
| zone->cursor = zone->base; |
| |
| if ( !zone->base || zone->limit == zone->base ) |
| { |
| FT_ERROR(( "cff_decoder_parse_charstrings:" |
| " invoking empty subrs!\n" )); |
| goto Syntax_Error; |
| } |
| |
| decoder->zone = zone; |
| ip = zone->base; |
| limit = zone->limit; |
| } |
| break; |
| |
| case cff_op_callgsubr: |
| { |
| FT_UInt idx = (FT_UInt)( ( args[0] >> 16 ) + |
| decoder->globals_bias ); |
| |
| |
| FT_TRACE4(( " callgsubr(%d)\n", idx )); |
| |
| if ( idx >= decoder->num_globals ) |
| { |
| FT_ERROR(( "cff_decoder_parse_charstrings:" )); |
| FT_ERROR(( " invalid global subr index\n" )); |
| goto Syntax_Error; |
| } |
| |
| if ( zone - decoder->zones >= CFF_MAX_SUBRS_CALLS ) |
| { |
| FT_ERROR(( "cff_decoder_parse_charstrings:" |
| " too many nested subrs\n" )); |
| goto Syntax_Error; |
| } |
| |
| zone->cursor = ip; /* save current instruction pointer */ |
| |
| zone++; |
| zone->base = decoder->globals[idx]; |
| zone->limit = decoder->globals[idx + 1]; |
| zone->cursor = zone->base; |
| |
| if ( !zone->base || zone->limit == zone->base ) |
| { |
| FT_ERROR(( "cff_decoder_parse_charstrings:" |
| " invoking empty subrs!\n" )); |
| goto Syntax_Error; |
| } |
| |
| decoder->zone = zone; |
| ip = zone->base; |
| limit = zone->limit; |
| } |
| break; |
| |
| case cff_op_return: |
| FT_TRACE4(( " return\n" )); |
| |
| if ( decoder->zone <= decoder->zones ) |
| { |
| FT_ERROR(( "cff_decoder_parse_charstrings:" |
| " unexpected return\n" )); |
| goto Syntax_Error; |
| } |
| |
| decoder->zone--; |
| zone = decoder->zone; |
| ip = zone->cursor; |
| limit = zone->limit; |
| break; |
| |
| default: |
| Unimplemented: |
| FT_ERROR(( "Unimplemented opcode: %d", ip[-1] )); |
| |
| if ( ip[-1] == 12 ) |
| FT_ERROR(( " %d", ip[0] )); |
| FT_ERROR(( "\n" )); |
| |
| return CFF_Err_Unimplemented_Feature; |
| } |
| |
| decoder->top = args; |
| |
| } /* general operator processing */ |
| |
| } /* while ip < limit */ |
| |
| FT_TRACE4(( "..end..\n\n" )); |
| |
| Fail: |
| return error; |
| |
| Syntax_Error: |
| FT_TRACE4(( "cff_decoder_parse_charstrings: syntax error!\n" )); |
| return CFF_Err_Invalid_File_Format; |
| |
| Stack_Underflow: |
| FT_TRACE4(( "cff_decoder_parse_charstrings: stack underflow!\n" )); |
| return CFF_Err_Too_Few_Arguments; |
| |
| Stack_Overflow: |
| FT_TRACE4(( "cff_decoder_parse_charstrings: stack overflow!\n" )); |
| return CFF_Err_Stack_Overflow; |
| } |
| |
| |
| /*************************************************************************/ |
| /*************************************************************************/ |
| /*************************************************************************/ |
| /********** *********/ |
| /********** *********/ |
| /********** 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. *********/ |
| /********** *********/ |
| /*************************************************************************/ |
| /*************************************************************************/ |
| /*************************************************************************/ |
| |
| |
| #if 0 /* unused until we support pure CFF fonts */ |
| |
| |
| FT_LOCAL_DEF( FT_Error ) |
| cff_compute_max_advance( TT_Face face, |
| FT_Int* max_advance ) |
| { |
| FT_Error error = CFF_Err_Ok; |
| CFF_Decoder decoder; |
| FT_Int glyph_index; |
| CFF_Font cff = (CFF_Font)face->other; |
| |
| |
| *max_advance = 0; |
| |
| /* Initialize load decoder */ |
| cff_decoder_init( &decoder, face, 0, 0, 0, 0 ); |
| |
| 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++ ) |
| { |
| FT_Byte* charstring; |
| FT_ULong charstring_len; |
| |
| |
| /* now get load the unscaled outline */ |
| error = cff_get_glyph_data( face, glyph_index, |
| &charstring, &charstring_len ); |
| if ( !error ) |
| { |
| error = cff_decoder_prepare( &decoder, size, glyph_index ); |
| if ( !error ) |
| error = cff_decoder_parse_charstrings( &decoder, |
| charstring, |
| charstring_len ); |
| |
| cff_free_glyph_data( face, &charstring, &charstring_len ); |
| } |
| |
| /* ignore the error if one has occurred -- skip to next glyph */ |
| error = CFF_Err_Ok; |
| } |
| |
| *max_advance = decoder.builder.advance.x; |
| |
| return CFF_Err_Ok; |
| } |
| |
| |
| #endif /* 0 */ |
| |
| |
| FT_LOCAL_DEF( FT_Error ) |
| cff_slot_load( CFF_GlyphSlot glyph, |
| CFF_Size size, |
| FT_UInt glyph_index, |
| FT_Int32 load_flags ) |
| { |
| FT_Error error; |
| CFF_Decoder decoder; |
| TT_Face face = (TT_Face)glyph->root.face; |
| FT_Bool hinting, force_scaling; |
| CFF_Font cff = (CFF_Font)face->extra.data; |
| |
| FT_Matrix font_matrix; |
| FT_Vector font_offset; |
| |
| |
| force_scaling = FALSE; |
| |
| /* in a CID-keyed font, consider `glyph_index' as a CID and map */ |
| /* it immediately to the real glyph_index -- if it isn't a */ |
| /* subsetted font, glyph_indices and CIDs are identical, though */ |
| if ( cff->top_font.font_dict.cid_registry != 0xFFFFU && |
| cff->charset.cids ) |
| { |
| /* don't handle CID 0 (.notdef) which is directly mapped to GID 0 */ |
| if ( glyph_index != 0 ) |
| { |
| glyph_index = cff_charset_cid_to_gindex( &cff->charset, |
| glyph_index ); |
| if ( glyph_index == 0 ) |
| return CFF_Err_Invalid_Argument; |
| } |
| } |
| else if ( glyph_index >= cff->num_glyphs ) |
| return CFF_Err_Invalid_Argument; |
| |
| if ( load_flags & FT_LOAD_NO_RECURSE ) |
| load_flags |= FT_LOAD_NO_SCALE | FT_LOAD_NO_HINTING; |
| |
| glyph->x_scale = 0x10000L; |
| glyph->y_scale = 0x10000L; |
| if ( size ) |
| { |
| glyph->x_scale = size->root.metrics.x_scale; |
| glyph->y_scale = size->root.metrics.y_scale; |
| } |
| |
| #ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS |
| |
| /* try to load embedded bitmap if any */ |
| /* */ |
| /* XXX: The convention should be emphasized in */ |
| /* the documents because it can be confusing. */ |
| if ( size ) |
| { |
| CFF_Face cff_face = (CFF_Face)size->root.face; |
| SFNT_Service sfnt = (SFNT_Service)cff_face->sfnt; |
| FT_Stream stream = cff_face->root.stream; |
| |
| |
| if ( size->strike_index != 0xFFFFFFFFUL && |
| sfnt->load_eblc && |
| ( load_flags & FT_LOAD_NO_BITMAP ) == 0 ) |
| { |
| TT_SBit_MetricsRec metrics; |
| |
| |
| error = sfnt->load_sbit_image( face, |
| size->strike_index, |
| glyph_index, |
| (FT_Int)load_flags, |
| stream, |
| &glyph->root.bitmap, |
| &metrics ); |
| |
| if ( !error ) |
| { |
| glyph->root.outline.n_points = 0; |
| glyph->root.outline.n_contours = 0; |
| |
| glyph->root.metrics.width = (FT_Pos)metrics.width << 6; |
| glyph->root.metrics.height = (FT_Pos)metrics.height << 6; |
| |
| glyph->root.metrics.horiBearingX = (FT_Pos)metrics.horiBearingX << 6; |
| glyph->root.metrics.horiBearingY = (FT_Pos)metrics.horiBearingY << 6; |
| glyph->root.metrics.horiAdvance = (FT_Pos)metrics.horiAdvance << 6; |
| |
| glyph->root.metrics.vertBearingX = (FT_Pos)metrics.vertBearingX << 6; |
| glyph->root.metrics.vertBearingY = (FT_Pos)metrics.vertBearingY << 6; |
| glyph->root.metrics.vertAdvance = (FT_Pos)metrics.vertAdvance << 6; |
| |
| glyph->root.format = FT_GLYPH_FORMAT_BITMAP; |
| |
| if ( load_flags & FT_LOAD_VERTICAL_LAYOUT ) |
| { |
| glyph->root.bitmap_left = metrics.vertBearingX; |
| glyph->root.bitmap_top = metrics.vertBearingY; |
| } |
| else |
| { |
| glyph->root.bitmap_left = metrics.horiBearingX; |
| glyph->root.bitmap_top = metrics.horiBearingY; |
| } |
| return error; |
| } |
| } |
| } |
| |
| #endif /* TT_CONFIG_OPTION_EMBEDDED_BITMAPS */ |
| |
| /* return immediately if we only want the embedded bitmaps */ |
| if ( load_flags & FT_LOAD_SBITS_ONLY ) |
| return CFF_Err_Invalid_Argument; |
| |
| /* if we have a CID subfont, use its matrix (which has already */ |
| /* been multiplied with the root matrix) */ |
| |
| /* this scaling is only relevant if the PS hinter isn't active */ |
| if ( cff->num_subfonts ) |
| { |
| FT_Byte fd_index = cff_fd_select_get( &cff->fd_select, |
| glyph_index ); |
| |
| FT_Int top_upm = cff->top_font.font_dict.units_per_em; |
| FT_Int sub_upm = cff->subfonts[fd_index]->font_dict.units_per_em; |
| |
| |
| font_matrix = cff->subfonts[fd_index]->font_dict.font_matrix; |
| font_offset = cff->subfonts[fd_index]->font_dict.font_offset; |
| |
| if ( top_upm != sub_upm ) |
| { |
| glyph->x_scale = FT_MulDiv( glyph->x_scale, top_upm, sub_upm ); |
| glyph->y_scale = FT_MulDiv( glyph->y_scale, top_upm, sub_upm ); |
| |
| force_scaling = TRUE; |
| } |
| } |
| else |
| { |
| font_matrix = cff->top_font.font_dict.font_matrix; |
| font_offset = cff->top_font.font_dict.font_offset; |
| } |
| |
| 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; /* by default */ |
| |
| { |
| FT_Byte* charstring; |
| FT_ULong charstring_len; |
| |
| |
| cff_decoder_init( &decoder, face, size, glyph, hinting, |
| FT_LOAD_TARGET_MODE( load_flags ) ); |
| |
| if ( load_flags & FT_LOAD_ADVANCE_ONLY ) |
| decoder.width_only = TRUE; |
| |
| decoder.builder.no_recurse = |
| (FT_Bool)( load_flags & FT_LOAD_NO_RECURSE ); |
| |
| /* now load the unscaled outline */ |
| error = cff_get_glyph_data( face, glyph_index, |
| &charstring, &charstring_len ); |
| if ( !error ) |
| { |
| error = cff_decoder_prepare( &decoder, size, glyph_index ); |
| if ( !error ) |
| { |
| error = cff_decoder_parse_charstrings( &decoder, |
| charstring, |
| charstring_len ); |
| |
| cff_free_glyph_data( face, &charstring, charstring_len ); |
| |
| |
| #ifdef FT_CONFIG_OPTION_INCREMENTAL |
| /* Control data and length may not be available for incremental */ |
| /* fonts. */ |
| if ( face->root.internal->incremental_interface ) |
| { |
| glyph->root.control_data = 0; |
| glyph->root.control_len = 0; |
| } |
| else |
| #endif /* FT_CONFIG_OPTION_INCREMENTAL */ |
| |
| /* We set control_data and control_len if charstrings is loaded. */ |
| /* See how charstring loads at cff_index_access_element() in */ |
| /* cffload.c. */ |
| { |
| CFF_Index csindex = &cff->charstrings_index; |
| |
| |
| if ( csindex->offsets ) |
| { |
| glyph->root.control_data = csindex->bytes + |
| csindex->offsets[glyph_index] - 1; |
| glyph->root.control_len = charstring_len; |
| } |
| } |
| } |
| } |
| |
| /* save new glyph tables */ |
| cff_builder_done( &decoder.builder ); |
| } |
| |
| #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 */ |
| |
| if ( !error ) |
| { |
| /* Now, set the metrics -- this is rather simple, as */ |
| /* the left side bearing is the xMin, and the top side */ |
| /* bearing the yMax. */ |
| |
| /* 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.glyph_width; |
| 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; |
| FT_Bool has_vertical_info; |
| |
| |
| /* copy the _unscaled_ advance width */ |
| metrics->horiAdvance = decoder.glyph_width; |
| glyph->root.linearHoriAdvance = decoder.glyph_width; |
| glyph->root.internal->glyph_transformed = 0; |
| |
| has_vertical_info = FT_BOOL( face->vertical_info && |
| face->vertical.number_Of_VMetrics > 0 && |
| face->vertical.long_metrics ); |
| |
| /* get the vertical metrics from the vtmx table if we have one */ |
| if ( has_vertical_info ) |
| { |
| FT_Short vertBearingY = 0; |
| FT_UShort vertAdvance = 0; |
| |
| |
| ( (SFNT_Service)face->sfnt )->get_metrics( face, 1, |
| glyph_index, |
| &vertBearingY, |
| &vertAdvance ); |
| metrics->vertBearingY = vertBearingY; |
| metrics->vertAdvance = vertAdvance; |
| } |
| else |
| { |
| /* make up vertical ones */ |
| if ( face->os2.version != 0xFFFFU ) |
| metrics->vertAdvance = (FT_Pos)( face->os2.sTypoAscender - |
| face->os2.sTypoDescender ); |
| else |
| metrics->vertAdvance = (FT_Pos)( face->horizontal.Ascender - |
| face->horizontal.Descender ); |
| } |
| |
| glyph->root.linearVertAdvance = metrics->vertAdvance; |
| |
| glyph->root.format = FT_GLYPH_FORMAT_OUTLINE; |
| |
| glyph->root.outline.flags = 0; |
| if ( size && size->root.metrics.y_ppem < 24 ) |
| glyph->root.outline.flags |= FT_OUTLINE_HIGH_PRECISION; |
| |
| glyph->root.outline.flags |= FT_OUTLINE_REVERSE_FILL; |
| |
| /* apply the font matrix -- `xx' has already been normalized */ |
| if ( !( font_matrix.yy == 0x10000L && |
| font_matrix.xy == 0 && |
| font_matrix.yx == 0 ) ) |
| FT_Outline_Transform( &glyph->root.outline, &font_matrix ); |
| |
| if ( !( font_offset.x == 0 && |
| font_offset.y == 0 ) ) |
| 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; |
| |
| if ( ( load_flags & FT_LOAD_NO_SCALE ) == 0 || force_scaling ) |
| { |
| /* scale the outline and the metrics */ |
| FT_Int n; |
| FT_Outline* cur = &glyph->root.outline; |
| 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( &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 ( has_vertical_info ) |
| metrics->vertBearingX = -metrics->width / 2; |
| else |
| ft_synthesize_vertical_metrics( metrics, |
| metrics->vertAdvance ); |
| } |
| } |
| |
| return error; |
| } |
| |
| |
| /* END */ |
