+++ /dev/null
-/***************************************************************************/
-/* */
-/* cffgload.c */
-/* */
-/* OpenType Glyph Loader (body). */
-/* */
-/* Copyright 1996-2001 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 "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,
-
- /* 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
-
-
- 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, /* hintmask */
- 0, /* 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
- };
-
-
- /*************************************************************************/
- /*************************************************************************/
- /*************************************************************************/
- /********** *********/
- /********** *********/
- /********** GENERIC CHARSTRING PARSING *********/
- /********** *********/
- /********** *********/
- /*************************************************************************/
- /*************************************************************************/
- /*************************************************************************/
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* CFF_Init_Builder */
- /* */
- /* <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. */
- /* */
- static void
- CFF_Init_Builder( CFF_Builder* builder,
- TT_Face face,
- CFF_Size size,
- CFF_GlyphSlot glyph )
- {
- 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 );
- }
-
- if ( size )
- {
- builder->scale_x = size->metrics.x_scale;
- builder->scale_y = size->metrics.y_scale;
- }
-
- 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_Done_Builder */
- /* */
- /* <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_Done_Builder( 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_Init_Decoder */
- /* */
- /* <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. */
- /* */
- FT_LOCAL_DEF void
- CFF_Init_Decoder( CFF_Decoder* decoder,
- TT_Face face,
- CFF_Size size,
- CFF_GlyphSlot slot )
- {
- CFF_Font* cff = (CFF_Font*)face->extra.data;
-
-
- /* clear everything */
- MEM_Set( decoder, 0, sizeof ( *decoder ) );
-
- /* initialize builder */
- CFF_Init_Builder( &decoder->builder, face, size, slot );
-
- /* initialize Type2 decoder */
- decoder->num_globals = cff->num_global_subrs;
- decoder->globals = cff->global_subrs;
- decoder->globals_bias = cff_compute_bias( decoder->num_globals );
- }
-
-
- /* this function is used to select the locals subrs array */
- FT_LOCAL_DEF void
- CFF_Prepare_Decoder( CFF_Decoder* decoder,
- FT_UInt glyph_index )
- {
- CFF_Font* cff = (CFF_Font*)decoder->builder.face->extra.data;
- CFF_SubFont* sub = &cff->top_font;
-
-
- /* manage CID fonts */
- if ( cff->num_subfonts >= 1 )
- {
- FT_Byte fd_index = CFF_Get_FD( &cff->fd_select, glyph_index );
-
-
- sub = cff->subfonts[fd_index];
- }
-
- 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;
- }
-
-
- /* check that there is enough room 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
- 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
- add_point1( CFF_Builder* builder,
- FT_Pos x,
- FT_Pos y )
- {
- FT_Error error;
-
-
- error = check_points( builder, 1 );
- if ( !error )
- add_point( builder, x, y, 1 );
-
- return error;
- }
-
-
- /* check room for a new contour, then add it */
- static FT_Error
- 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
- start_point( CFF_Builder* builder,
- FT_Pos x,
- FT_Pos y )
- {
- FT_Error error = 0;
-
-
- /* test whether we are building a new contour */
- if ( !builder->path_begun )
- {
- builder->path_begun = 1;
- error = add_contour( builder );
- if ( !error )
- error = add_point1( builder, x, y );
- }
- return error;
- }
-
-
- /* close the current contour */
- static void
- close_contour( CFF_Builder* builder )
- {
- FT_Outline* outline = builder->current;
-
- /* 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 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;
-
-
- /* 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_standard_encoding[charcode];
-
- for ( n = 0; n < cff->num_glyphs; n++ )
- {
- if ( cff->charset.sids[n] == glyph_sid )
- return n;
- }
-
- return -1;
- }
-
-
- static FT_Error
- cff_operator_seac( CFF_Decoder* decoder,
- FT_Pos adx,
- FT_Pos ady,
- FT_Int bchar,
- FT_Int achar )
- {
- FT_Error error;
- FT_Int bchar_index, achar_index, n_base_points;
- FT_Outline* base = decoder->builder.base;
- TT_Face face = decoder->builder.face;
- CFF_Font* cff = (CFF_Font*)(face->extra.data);
- FT_Vector left_bearing, advance;
- FT_Byte* charstring;
- FT_ULong charstring_len;
-
-
- 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 ( decoder->builder.no_recurse )
- {
- FT_GlyphSlot glyph = (FT_GlyphSlot)decoder->builder.glyph;
- FT_GlyphLoader* loader = glyph->internal->loader;
- FT_SubGlyph* subg;
-
-
- /* reallocate subglyph array if necessary */
- error = FT_GlyphLoader_Check_Subglyphs( 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 = adx;
- subg->arg2 = ady;
-
- /* 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;
- }
-
- /* First load `bchar' in builder */
- error = CFF_Access_Element( &cff->charstrings_index, bchar_index,
- &charstring, &charstring_len );
- if ( !error )
- {
- error = CFF_Parse_CharStrings( decoder, charstring, charstring_len );
-
- if ( error )
- goto Exit;
-
- CFF_Forget_Element( &cff->charstrings_index, &charstring );
- }
-
- n_base_points = base->n_points;
-
- /* Save the left bearing and width of the base character */
- /* as they will be erased by the next load. */
-
- left_bearing = decoder->builder.left_bearing;
- advance = decoder->builder.advance;
-
- decoder->builder.left_bearing.x = 0;
- decoder->builder.left_bearing.y = 0;
-
- /* Now load `achar' on top of the base outline. */
- error = CFF_Access_Element( &cff->charstrings_index, achar_index,
- &charstring, &charstring_len );
- if ( !error )
- {
- error = CFF_Parse_CharStrings( decoder, charstring, charstring_len );
-
- if ( error )
- goto Exit;
-
- CFF_Forget_Element( &cff->charstrings_index, &charstring );
- }
-
- /* Restore the left side bearing and advance width */
- /* of the base character. */
- decoder->builder.left_bearing = left_bearing;
- decoder->builder.advance = advance;
-
- /* Finally, move the accent. */
- if ( decoder->builder.load_points )
- {
- FT_Outline dummy;
-
-
- dummy.n_points = (short)( base->n_points - n_base_points );
- dummy.points = base->points + n_base_points;
-
- FT_Outline_Translate( &dummy, adx, ady );
- }
-
- Exit:
- return error;
- }
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* CFF_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_Parse_CharStrings( CFF_Decoder* decoder,
- FT_Byte* charstring_base,
- FT_Int 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;
-
-
- /* 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 ) ) & 0xFFFF;
- if ( seed == 0 )
- seed = 0x7384;
-
- /* initialize the decoder */
- decoder->top = decoder->stack;
- decoder->zone = decoder->zones;
- zone = decoder->zones;
- stack = decoder->top;
-
- 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;
-
- /* 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 & 0xFFFF ) )
- FT_TRACE4(( " %d", (FT_Int32)( val >> 16 ) ));
- else
- FT_TRACE4(( " %.2f", val / 65536.0 ));
-#endif
-
- }
- else
- {
- FT_Fixed* args = decoder->top;
- FT_Int num_args = 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 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 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 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 )
- {
- args = stack;
-
- 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:
- 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 );
-
- /* Consumed an argument. */
- num_args--;
- args++;
- }
- }
-
- decoder->read_width = 0;
- req_args = 0;
- }
-
- req_args &= 15;
- if ( num_args < req_args )
- goto Stack_Underflow;
- args -= req_args;
- num_args -= req_args;
-
- switch ( op )
- {
- case cff_op_hstem:
- case cff_op_vstem:
- case cff_op_hstemhm:
- case cff_op_vstemhm:
- /* if the number of arguments is not even, the first one */
- /* is simply the glyph width, encoded as the difference */
- /* to nominalWidthX */
- FT_TRACE4(( op == cff_op_hstem ? " hstem" :
- op == cff_op_vstem ? " vstem" :
- op == cff_op_hstemhm ? " hstemhm" :
- " vstemhm" ));
- 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" ));
-
- decoder->num_hints += num_args / 2;
-
-#ifdef FT_DEBUG_LEVEL_TRACE
- {
- FT_UInt maskbyte;
-
- FT_TRACE4(( " " ));
-
- for ( maskbyte = 0;
- maskbyte < (FT_UInt)(( decoder->num_hints + 7 ) >> 3);
- maskbyte++, ip++ )
- {
- FT_TRACE4(( "%02X", *ip ));
- }
-
- }
-#else
- ip += ( decoder->num_hints + 7 ) >> 3;
-#endif
- if ( ip >= limit )
- goto Syntax_Error;
- args = stack;
- break;
-
- case cff_op_rmoveto:
- FT_TRACE4(( " rmoveto" ));
-
- close_contour( builder );
- builder->path_begun = 0;
- x += args[0];
- y += args[1];
- args = stack;
- break;
-
- case cff_op_vmoveto:
- FT_TRACE4(( " vmoveto" ));
-
- close_contour( builder );
- builder->path_begun = 0;
- y += args[0];
- args = stack;
- break;
-
- case cff_op_hmoveto:
- FT_TRACE4(( " hmoveto" ));
-
- close_contour( builder );
- builder->path_begun = 0;
- x += args[0];
- args = stack;
- break;
-
- case cff_op_rlineto:
- FT_TRACE4(( " rlineto" ));
-
- if ( start_point ( builder, x, y ) ||
- check_points( builder, num_args / 2 ) )
- goto Memory_Error;
-
- if ( num_args < 2 || num_args & 1 )
- goto Stack_Underflow;
-
- args = stack;
- while ( args < decoder->top )
- {
- x += args[0];
- y += args[1];
- 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"
- : " vlineto" ));
-
- if ( start_point ( builder, x, y ) ||
- check_points( builder, num_args ) )
- goto Memory_Error;
-
- args = stack;
- while (args < decoder->top )
- {
- if ( phase )
- x += args[0];
- else
- y += args[0];
-
- if ( add_point1( builder, x, y ) )
- goto Memory_Error;
-
- args++;
- phase ^= 1;
- }
- args = stack;
- }
- break;
-
- case cff_op_rrcurveto:
- FT_TRACE4(( " rrcurveto" ));
-
- /* check number of arguments; must be a multiple of 6 */
- if ( num_args % 6 != 0 )
- goto Stack_Underflow;
-
- if ( start_point ( builder, x, y ) ||
- check_points( builder, num_args / 2 ) )
- goto Memory_Error;
-
- args = stack;
- while ( args < decoder->top )
- {
- x += args[0];
- y += args[1];
- add_point( builder, x, y, 0 );
- x += args[2];
- y += args[3];
- add_point( builder, x, y, 0 );
- x += args[4];
- y += args[5];
- add_point( builder, x, y, 1 );
- args += 6;
- }
- args = stack;
- break;
-
- case cff_op_vvcurveto:
- FT_TRACE4(( " vvcurveto" ));
-
- if ( start_point ( builder, x, y ) )
- goto Memory_Error;
-
- args = stack;
- if ( num_args & 1 )
- {
- x += args[0];
- args++;
- num_args--;
- }
-
- if ( num_args % 4 != 0 )
- goto Stack_Underflow;
-
- if ( check_points( builder, 3 * ( num_args / 4 ) ) )
- goto Memory_Error;
-
- while ( args < decoder->top )
- {
- y += args[0];
- add_point( builder, x, y, 0 );
- x += args[1];
- y += args[2];
- add_point( builder, x, y, 0 );
- y += args[3];
- add_point( builder, x, y, 1 );
- args += 4;
- }
- args = stack;
- break;
-
- case cff_op_hhcurveto:
- FT_TRACE4(( " hhcurveto" ));
-
- if ( start_point ( builder, x, y ) )
- goto Memory_Error;
-
- args = stack;
- if ( num_args & 1 )
- {
- y += args[0];
- args++;
- num_args--;
- }
-
- if ( num_args % 4 != 0 )
- goto Stack_Underflow;
-
- if ( check_points( builder, 3 * ( num_args / 4 ) ) )
- goto Memory_Error;
-
- while ( args < decoder->top )
- {
- x += args[0];
- add_point( builder, x, y, 0 );
- x += args[1];
- y += args[2];
- add_point( builder, x, y, 0 );
- x += args[3];
- add_point( builder, x, y, 1 );
- args += 4;
- }
- args = stack;
- break;
-
- case cff_op_vhcurveto:
- case cff_op_hvcurveto:
- {
- FT_Int phase;
-
-
- FT_TRACE4(( op == cff_op_vhcurveto ? " vhcurveto"
- : " hvcurveto" ));
-
- if ( start_point ( builder, x, y ) )
- goto Memory_Error;
-
- args = stack;
- if (num_args < 4 || ( num_args % 4 ) > 1 )
- goto Stack_Underflow;
-
- if ( check_points( builder, ( num_args / 4 ) * 3 ) )
- goto Stack_Underflow;
-
- phase = ( op == cff_op_hvcurveto );
-
- while ( num_args >= 4 )
- {
- num_args -= 4;
- if ( phase )
- {
- x += args[0];
- add_point( builder, x, y, 0 );
- x += args[1];
- y += args[2];
- add_point( builder, x, y, 0 );
- y += args[3];
- if ( num_args == 1 )
- x += args[4];
- add_point( builder, x, y, 1 );
- }
- else
- {
- y += args[0];
- add_point( builder, x, y, 0 );
- x += args[1];
- y += args[2];
- add_point( builder, x, y, 0 );
- x += args[3];
- if ( num_args == 1 )
- y += args[4];
- add_point( builder, x, y, 1 );
- }
- args += 4;
- phase ^= 1;
- }
- args = stack;
- }
- break;
-
- case cff_op_rlinecurve:
- {
- FT_Int num_lines = ( num_args - 6 ) / 2;
-
-
- FT_TRACE4(( " rlinecurve" ));
-
- if ( num_args < 8 || ( num_args - 6 ) & 1 )
- goto Stack_Underflow;
-
- if ( start_point( builder, x, y ) ||
- check_points( builder, num_lines + 3 ) )
- goto Memory_Error;
-
- args = stack;
-
- /* first, add the line segments */
- while ( num_lines > 0 )
- {
- x += args[0];
- y += args[1];
- add_point( builder, x, y, 1 );
- args += 2;
- num_lines--;
- }
-
- /* then the curve */
- x += args[0];
- y += args[1];
- add_point( builder, x, y, 0 );
- x += args[2];
- y += args[3];
- add_point( builder, x, y, 0 );
- x += args[4];
- y += args[5];
- add_point( builder, x, y, 1 );
- args = stack;
- }
- break;
-
- case cff_op_rcurveline:
- {
- FT_Int num_curves = ( num_args - 2 ) / 6;
-
-
- FT_TRACE4(( " rcurveline" ));
-
- if ( num_args < 8 || ( num_args - 2 ) % 6 )
- goto Stack_Underflow;
-
- if ( start_point ( builder, x, y ) ||
- check_points( builder, num_curves*3 + 2 ) )
- goto Memory_Error;
-
- args = stack;
-
- /* first, add the curves */
- while ( num_curves > 0 )
- {
- x += args[0];
- y += args[1];
- add_point( builder, x, y, 0 );
- x += args[2];
- y += args[3];
- add_point( builder, x, y, 0 );
- x += args[4];
- y += args[5];
- add_point( builder, x, y, 1 );
- args += 6;
- num_curves--;
- }
-
- /* then the final line */
- x += args[0];
- y += args[1];
- add_point( builder, x, y, 1 );
- args = stack;
- }
- break;
-
- case cff_op_hflex1:
- {
- FT_Pos start_y;
-
-
- FT_TRACE4(( " hflex1" ));
-
- args = stack;
-
- /* 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 ( start_point( builder, x, y ) ||
- check_points( builder, 6 ) )
- goto Memory_Error;
-
- /* Record the starting point's y postion for later use */
- start_y = y;
-
- /* first control point */
- x += args[0];
- y += args[1];
- add_point( builder, x, y, 0 );
-
- /* second control point */
- x += args[2];
- y += args[3];
- 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];
- add_point( builder, x, y, 1 );
-
- /* third control point, with y-value the same as the join */
- /* point's y-value */
- x += args[5];
- add_point( builder, x, y, 0 );
-
- /* fourth control point */
- x += args[6];
- y += args[7];
- add_point( builder, x, y, 0 );
-
- /* ending point, with y-value the same as the start */
- x += args[8];
- y = start_y;
- add_point( builder, x, y, 1 );
-
- args = stack;
- break;
- }
-
- case cff_op_hflex:
- {
- FT_Pos start_y;
-
-
- FT_TRACE4(( " hflex" ));
-
- args = stack;
-
- /* adding six more points; 4 control points, 2 on-curve points */
- if ( start_point( builder, x, y ) ||
- check_points ( builder, 6 ) )
- goto Memory_Error;
-
- /* record the starting point's y-position for later use */
- start_y = y;
-
- /* first control point */
- x += args[0];
- add_point( builder, x, y, 0 );
-
- /* second control point */
- x += args[1];
- y += args[2];
- 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];
- add_point( builder, x, y, 1 );
-
- /* third control point, with y-value the same as the join */
- /* point's y-value */
- x += args[4];
- add_point( builder, x, y, 0 );
-
- /* fourth control point */
- x += args[5];
- y = start_y;
- 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];
- 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_Int dx = 0, dy = 0; /* used in horizontal/vertical */
- /* algorithm below */
- FT_Int horizontal, count;
-
-
- FT_TRACE4(( " flex1" ));
-
- /* adding six more points; 4 control points, 2 on-curve points */
- if ( start_point( builder, x, y ) ||
- check_points( builder, 6 ) )
- goto Memory_Error;
-
- /* record the starting point's x, y postion 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... */
-
- args = stack;
-
- /* grab up to the last argument */
- for ( count = 5; count > 0; count-- )
- {
- dx += args[0];
- dy += args[1];
- args += 2;
- }
-
- /* rewind */
- args = stack;
-
- 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];
- 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];
- }
-
- add_point( builder, x, y, 1 );
-
- args = stack;
- break;
- }
-
- case cff_op_flex:
- {
- FT_UInt count;
-
-
- FT_TRACE4(( " flex" ));
-
- if ( start_point( builder, x, y ) ||
- check_points( builder, 6 ) )
- goto Memory_Error;
-
- args = stack;
- for ( count = 6; count > 0; count-- )
- {
- x += args[0];
- y += args[1];
- add_point( builder, x, y,
- (FT_Bool)( count == 3 || count == 0 ) );
- args += 2;
- }
-
- args = stack;
- }
- break;
-
- case cff_op_endchar:
- FT_TRACE4(( " endchar" ));
-
- /* We are going to emulate the seac operator. */
- if ( num_args == 4 )
- {
- error = cff_operator_seac( decoder,
- args[0] >> 16, args[1] >> 16,
- args[2] >> 16, args[3] >> 16 );
- args += 4;
- }
-
- if ( !error )
- error = CFF_Err_Ok;
-
- close_contour( builder );
-
- /* add current outline to the glyph slot */
- FT_GlyphLoader_Add( builder->loader );
-
- /* return now! */
- FT_TRACE4(( "\n\n" ));
- return error;
-
- case cff_op_abs:
- FT_TRACE4(( " abs" ));
-
- if ( args[0] < 0 )
- args[0] = -args[0];
- args++;
- break;
-
- case cff_op_add:
- FT_TRACE4(( " add" ));
-
- args[0] += args[1];
- args++;
- break;
-
- case cff_op_sub:
- FT_TRACE4(( " sub" ));
-
- args[0] -= args[1];
- args++;
- break;
-
- case cff_op_div:
- FT_TRACE4(( " div" ));
-
- args[0] = FT_DivFix( args[0], args[1] );
- args++;
- break;
-
- case cff_op_neg:
- FT_TRACE4(( " neg" ));
-
- args[0] = -args[0];
- args++;
- break;
-
- case cff_op_random:
- {
- FT_Fixed rand;
-
-
- FT_TRACE4(( " rand" ));
-
- rand = seed;
- if ( rand >= 0x8000 )
- rand++;
-
- args[0] = rand;
- seed = FT_MulFix( seed, 0x10000L - seed );
- if ( seed == 0 )
- seed += 0x2873;
- args++;
- }
- break;
-
- case cff_op_mul:
- FT_TRACE4(( " mul" ));
-
- args[0] = FT_MulFix( args[0], args[1] );
- args++;
- break;
-
- case cff_op_sqrt:
- FT_TRACE4(( " sqrt" ));
-
- 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" ));
-
- break;
-
- case cff_op_exch:
- {
- FT_Fixed tmp;
-
-
- FT_TRACE4(( " exch" ));
-
- tmp = args[0];
- args[0] = args[1];
- args[1] = tmp;
- args += 2;
- }
- break;
-
- case cff_op_index:
- {
- FT_Int index = args[0] >> 16;
-
-
- FT_TRACE4(( " index" ));
-
- if ( index < 0 )
- index = 0;
- else if ( index > num_args - 2 )
- index = num_args - 2;
- args[0] = args[-( index + 1 )];
- args++;
- }
- break;
-
- case cff_op_roll:
- {
- FT_Int count = (FT_Int)( args[0] >> 16 );
- FT_Int index = (FT_Int)( args[1] >> 16 );
-
-
- FT_TRACE4(( " roll" ));
-
- if ( count <= 0 )
- count = 1;
-
- args -= count;
- if ( args < stack )
- goto Stack_Underflow;
-
- if ( index >= 0 )
- {
- while ( index > 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;
- index--;
- }
- }
- else
- {
- while ( index < 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;
- index++;
- }
- }
- args += count;
- }
- break;
-
- case cff_op_dup:
- FT_TRACE4(( " dup" ));
-
- args[1] = args[0];
- args++;
- break;
-
- case cff_op_put:
- {
- FT_Fixed val = args[0];
- FT_Int index = (FT_Int)( args[1] >> 16 );
-
-
- FT_TRACE4(( " put" ));
-
- if ( index >= 0 && index < decoder->len_buildchar )
- decoder->buildchar[index] = val;
- }
- break;
-
- case cff_op_get:
- {
- FT_Int index = (FT_Int)( args[0] >> 16 );
- FT_Fixed val = 0;
-
-
- FT_TRACE4(( " get" ));
-
- if ( index >= 0 && index < decoder->len_buildchar )
- val = decoder->buildchar[index];
-
- args[0] = val;
- args++;
- }
- break;
-
- case cff_op_store:
- FT_TRACE4(( " store "));
-
- goto Unimplemented;
-
- case cff_op_load:
- FT_TRACE4(( " load" ));
-
- goto Unimplemented;
-
- case cff_op_dotsection:
- /* this operator is deprecated and ignored by the parser */
- FT_TRACE4(( " dotsection" ));
- break;
-
- case cff_op_and:
- {
- FT_Fixed cond = args[0] && args[1];
-
-
- FT_TRACE4(( " and" ));
-
- args[0] = cond ? 0x10000L : 0;
- args++;
- }
- break;
-
- case cff_op_or:
- {
- FT_Fixed cond = args[0] || args[1];
-
-
- FT_TRACE4(( " or" ));
-
- args[0] = cond ? 0x10000L : 0;
- args++;
- }
- break;
-
- case cff_op_eq:
- {
- FT_Fixed cond = !args[0];
-
-
- FT_TRACE4(( " eq" ));
-
- args[0] = cond ? 0x10000L : 0;
- args++;
- }
- break;
-
- case cff_op_ifelse:
- {
- FT_Fixed cond = (args[2] <= args[3]);
-
-
- FT_TRACE4(( " ifelse" ));
-
- if ( !cond )
- args[0] = args[1];
- args++;
- }
- break;
-
- case cff_op_callsubr:
- {
- FT_UInt index = (FT_UInt)( ( args[0] >> 16 ) +
- decoder->locals_bias );
-
-
- FT_TRACE4(( " callsubr(%d)", index ));
-
- if ( index >= decoder->num_locals )
- {
- FT_ERROR(( "CFF_Parse_CharStrings:" ));
- FT_ERROR(( " invalid local subr index\n" ));
- goto Syntax_Error;
- }
-
- if ( zone - decoder->zones >= CFF_MAX_SUBRS_CALLS )
- {
- FT_ERROR(( "CFF_Parse_CharStrings: too many nested subrs\n" ));
- goto Syntax_Error;
- }
-
- zone->cursor = ip; /* save current instruction pointer */
-
- zone++;
- zone->base = decoder->locals[index];
- zone->limit = decoder->locals[index + 1];
- zone->cursor = zone->base;
-
- if ( !zone->base )
- {
- FT_ERROR(( "CFF_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 index = (FT_UInt)( ( args[0] >> 16 ) +
- decoder->globals_bias );
-
-
- FT_TRACE4(( " callgsubr(%d)", index ));
-
- if ( index >= decoder->num_globals )
- {
- FT_ERROR(( "CFF_Parse_CharStrings:" ));
- FT_ERROR(( " invalid global subr index\n" ));
- goto Syntax_Error;
- }
-
- if ( zone - decoder->zones >= CFF_MAX_SUBRS_CALLS )
- {
- FT_ERROR(( "CFF_Parse_CharStrings: too many nested subrs\n" ));
- goto Syntax_Error;
- }
-
- zone->cursor = ip; /* save current instruction pointer */
-
- zone++;
- zone->base = decoder->globals[index];
- zone->limit = decoder->globals[index+1];
- zone->cursor = zone->base;
-
- if ( !zone->base )
- {
- FT_ERROR(( "CFF_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" ));
-
- if ( decoder->zone <= decoder->zones )
- {
- FT_ERROR(( "CFF_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" ));
-
- return error;
-
- Syntax_Error:
- FT_TRACE4(( "CFF_Parse_CharStrings: syntax error!" ));
- return CFF_Err_Invalid_File_Format;
-
- Stack_Underflow:
- FT_TRACE4(( "CFF_Parse_CharStrings: stack underflow!" ));
- return CFF_Err_Too_Few_Arguments;
-
- Stack_Overflow:
- FT_TRACE4(( "CFF_Parse_CharStrings: stack overflow!" ));
- return CFF_Err_Stack_Overflow;
-
- Memory_Error:
- return builder->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. *********/
- /********** *********/
- /*************************************************************************/
- /*************************************************************************/
- /*************************************************************************/
-
-
-#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 = 0;
- CFF_Decoder decoder;
- FT_Int glyph_index;
- CFF_Font* cff = (CFF_Font*)face->other;
-
-
- *max_advance = 0;
-
- /* Initialize load decoder */
- CFF_Init_Decoder( &decoder, face, 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_Access_Element( &cff->charstrings_index, glyph_index,
- &charstring, &charstring_len );
- if ( !error )
- {
- CFF_Prepare_Decoder( &decoder, glyph_index );
- error = CFF_Parse_CharStrings( &decoder, charstring, charstring_len );
-
- CFF_Forget_Element( &cff->charstrings_index, &charstring );
- }
-
- /* ignore the error if one has occurred -- skip to next glyph */
- error = 0;
- }
-
- *max_advance = decoder.builder.advance.x;
-
- return CFF_Err_Ok;
- }
-
-
-#endif /* 0 */
-
-
- /*************************************************************************/
- /*************************************************************************/
- /*************************************************************************/
- /********** *********/
- /********** *********/
- /********** UNHINTED GLYPH LOADER *********/
- /********** *********/
- /********** The following code is in charge of loading a *********/
- /********** single outline. It completely ignores hinting *********/
- /********** and is used when FT_LOAD_NO_HINTING is set. *********/
- /********** *********/
- /*************************************************************************/
- /*************************************************************************/
- /*************************************************************************/
-
-
- FT_LOCAL_DEF FT_Error
- CFF_Load_Glyph( CFF_GlyphSlot glyph,
- CFF_Size size,
- FT_Int glyph_index,
- FT_Int load_flags )
- {
- FT_Error error;
- CFF_Decoder decoder;
- TT_Face face = (TT_Face)glyph->root.face;
- FT_Bool hinting;
- CFF_Font* cff = (CFF_Font*)face->extra.data;
-
- FT_Matrix font_matrix;
- FT_Vector font_offset;
-
-
- 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->metrics.x_scale;
- glyph->y_scale = size->metrics.y_scale;
- }
-
- glyph->root.outline.n_points = 0;
- glyph->root.outline.n_contours = 0;
-
- hinting = FT_BOOL( ( load_flags & FT_LOAD_NO_SCALE ) == 0 &&
- ( load_flags & FT_LOAD_NO_HINTING ) == 0 );
-
- glyph->root.format = ft_glyph_format_outline; /* by default */
-
- {
- FT_Byte* charstring;
- FT_ULong charstring_len;
-
-
- CFF_Init_Decoder( &decoder, face, size, glyph );
-
- decoder.builder.no_recurse =
- (FT_Bool)( ( load_flags & FT_LOAD_NO_RECURSE ) != 0 );
-
- /* now load the unscaled outline */
- error = CFF_Access_Element( &cff->charstrings_index, glyph_index,
- &charstring, &charstring_len );
- if ( !error )
- {
- CFF_Index csindex = cff->charstrings_index;
-
-
- CFF_Prepare_Decoder( &decoder, glyph_index );
- error = CFF_Parse_CharStrings( &decoder, charstring, charstring_len );
-
- CFF_Forget_Element( &cff->charstrings_index, &charstring );
-
- /* We set control_data and control_len if charstrings is loaded. */
- /* See how charstring loads at CFF_Access_Element() in cffload.c. */
-
- glyph->root.control_data =
- csindex.bytes + csindex.offsets[glyph_index] - 1;
- glyph->root.control_len =
- charstring_len;
- }
-
- /* save new glyph tables */
- CFF_Done_Builder( &decoder.builder );
- }
-
- font_matrix = cff->top_font.font_dict.font_matrix;
- font_offset = cff->top_font.font_dict.font_offset;
-
- /* 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 )
- {
- /* 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;
-
-
- /* copy the _unscaled_ advance width */
- metrics->horiAdvance = decoder.glyph_width;
- glyph->root.linearHoriAdvance = decoder.glyph_width;
- glyph->root.internal->glyph_transformed = 0;
-
- /* make up vertical metrics */
- metrics->vertBearingX = 0;
- metrics->vertBearingY = 0;
- metrics->vertAdvance = 0;
-
- glyph->root.linearVertAdvance = 0;
-
- glyph->root.format = ft_glyph_format_outline;
-
- glyph->root.outline.flags = 0;
- if ( size && size->metrics.y_ppem < 24 )
- glyph->root.outline.flags |= ft_outline_high_precision;
-
- glyph->root.outline.flags |= ft_outline_reverse_fill;
-
- /* apply the font matrix */
- FT_Outline_Transform( &glyph->root.outline, &font_matrix );
-
- FT_Outline_Translate( &glyph->root.outline,
- font_offset.x,
- font_offset.y );
-
- if ( ( load_flags & FT_LOAD_NO_SCALE ) == 0 )
- {
- /* 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 */
- 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 );
- }
-
- FT_Outline_Get_CBox( &glyph->root.outline, &cbox );
-
- /* Then scale the metrics */
- metrics->horiAdvance = FT_MulFix( metrics->horiAdvance, x_scale );
- metrics->vertAdvance = FT_MulFix( metrics->vertAdvance, y_scale );
-
- metrics->vertBearingX = FT_MulFix( metrics->vertBearingX, x_scale );
- metrics->vertBearingY = FT_MulFix( metrics->vertBearingY, y_scale );
- }
-
- /* compute the other metrics */
- FT_Outline_Get_CBox( &glyph->root.outline, &cbox );
-
- /* grid fit the bounding box if necessary */
- if ( hinting )
- {
- cbox.xMin &= -64;
- cbox.yMin &= -64;
- cbox.xMax = ( cbox.xMax + 63 ) & -64;
- cbox.yMax = ( cbox.yMax + 63 ) & -64;
- }
-
- metrics->width = cbox.xMax - cbox.xMin;
- metrics->height = cbox.yMax - cbox.yMin;
-
- metrics->horiBearingX = cbox.xMin;
- metrics->horiBearingY = cbox.yMax;
- }
- }
-
- return error;
- }
-
-
-/* END */
projects / rrdtool.git / blobdiff