ref: cd92b11dc630b67d0ae630e03469e656abd86c19
parent: fa3d6e94229b8169b3ede1e5f3ee0f6549cd9916
author: Tom Kacvinsky <[email protected]>
date: Tue Jan 2 19:15:00 EST 2001
This file was previously known as t2gload.c.
--- /dev/null
+++ b/src/cff/cffgload.c
@@ -1,0 +1,2254 @@
+/***************************************************************************/
+/* */
+/* cffgload.c */
+/* */
+/* OpenType Glyph Loader (body). */
+/* */
+/* Copyright 1996-2000 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_SOURCE_FILE(cff,cffload.h)
+#include FT_SOURCE_FILE(cff,cffgload.h)
+
+#include FT_INTERNAL_CFF_ERRORS_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_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 */
+
+ 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 < 33900 )
+ result = 1131;
+ else
+ result = 32768;
+
+ 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 = 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] = 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] = 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 = 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_Outline* outline;
+ 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;
+ outline = builder->current;
+
+ 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 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;
+ ip += ( decoder->num_hints + 7 ) >> 3;
+ 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_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 = ( 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_Prepare_Decoder( &decoder, glyph_index );
+ error = CFF_Parse_CharStrings( &decoder, charstring, charstring_len );
+
+ CFF_Forget_Element( &cff->charstrings_index, &charstring );
+ }
+
+ /* 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 */