1511 lines
46 KiB
C
1511 lines
46 KiB
C
/***************************************************************************/
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/* */
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/* cidgload.c */
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/* */
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/* CID-keyed Type1 Glyph Loader (body). */
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/* */
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/* Copyright 1996-2000 by */
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/* David Turner, Robert Wilhelm, and Werner Lemberg. */
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/* */
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/* This file is part of the FreeType project, and may only be used, */
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/* modified, and distributed under the terms of the FreeType project */
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/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
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/* this file you indicate that you have read the license and */
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/* understand and accept it fully. */
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/* */
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/***************************************************************************/
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#include <cidload.h>
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#include <cidgload.h>
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#include <freetype/internal/ftdebug.h>
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#include <freetype/internal/ftstream.h>
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/*************************************************************************/
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/* */
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/* The macro FT_COMPONENT is used in trace mode. It is an implicit */
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/* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */
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/* messages during execution. */
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/* */
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#undef FT_COMPONENT
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#define FT_COMPONENT trace_cidgload
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/* forward */
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static
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FT_Error cid_load_glyph( CID_Decoder* decoder,
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FT_UInt glyph_index );
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typedef enum T1_Operator_
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{
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op_none = 0,
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op_endchar,
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op_hsbw,
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op_seac,
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op_sbw,
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op_closepath,
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op_hlineto,
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op_hmoveto,
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op_hvcurveto,
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op_rlineto,
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op_rmoveto,
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op_rrcurveto,
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op_vhcurveto,
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op_vlineto,
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op_vmoveto,
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op_dotsection,
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op_hstem,
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op_hstem3,
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op_vstem,
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op_vstem3,
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op_div,
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op_callothersubr,
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op_callsubr,
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op_pop,
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op_return,
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op_setcurrentpoint,
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op_max /* never remove this one */
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} T1_Operator;
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static const FT_Int t1_args_count[op_max] =
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{
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0, /* none */
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0, /* endchar */
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2, /* hsbw */
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5, /* seac */
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4, /* sbw */
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0, /* closepath */
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1, /* hlineto */
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1, /* hmoveto */
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4, /* hvcurveto */
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2, /* rlineto */
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2, /* rmoveto */
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6, /* rrcurveto */
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4, /* vhcurveto */
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1, /* vlineto */
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1, /* vmoveto */
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0, /* dotsection */
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2, /* hstem */
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6, /* hstem3 */
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2, /* vstem */
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6, /* vstem3 */
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2, /* div */
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-1, /* callothersubr */
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1, /* callsubr */
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0, /* pop */
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0, /* return */
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2 /* setcurrentpoint */
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};
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/*************************************************************************/
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/*************************************************************************/
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/*************************************************************************/
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/********** *********/
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/********** *********/
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/********** GENERIC CHARSTRING PARSING *********/
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/********** *********/
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/********** *********/
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/*************************************************************************/
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/*************************************************************************/
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/*************************************************************************/
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/*************************************************************************/
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/* */
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/* <Function> */
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/* CID_Init_Builder */
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/* */
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/* <Description> */
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/* Initializes a given glyph builder. */
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/* */
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/* <InOut> */
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/* builder :: A pointer to the glyph builder to initialize. */
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/* */
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/* <Input> */
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/* face :: The current face object. */
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/* */
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/* size :: The current size object. */
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/* */
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/* glyph :: The current glyph object. */
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/* */
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LOCAL_FUNC
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void CID_Init_Builder( CID_Builder* builder,
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CID_Face face,
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T1_Size size,
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T1_GlyphSlot glyph )
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{
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builder->path_begun = 0;
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builder->load_points = 1;
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builder->face = face;
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builder->glyph = glyph;
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builder->memory = face->root.memory;
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if ( glyph )
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{
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FT_GlyphLoader* loader = glyph->root.loader;
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builder->loader = loader;
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builder->base = &loader->base.outline;
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builder->current = &loader->current.outline;
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FT_GlyphLoader_Rewind( loader );
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}
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if ( size )
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{
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builder->scale_x = size->root.metrics.x_scale;
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builder->scale_y = size->root.metrics.y_scale;
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}
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builder->pos_x = 0;
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builder->pos_y = 0;
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builder->left_bearing.x = 0;
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builder->left_bearing.y = 0;
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builder->advance.x = 0;
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builder->advance.y = 0;
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}
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/*************************************************************************/
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/* */
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/* <Function> */
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/* CID_Done_Builder */
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/* */
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/* <Description> */
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/* Finalizes a given glyph builder. Its contents can still be used */
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/* after the call, but the function saves important information */
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/* within the corresponding glyph slot. */
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/* */
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/* <Input> */
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/* builder :: A pointer to the glyph builder to finalize. */
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/* */
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LOCAL_FUNC
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void CID_Done_Builder( CID_Builder* builder )
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{
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T1_GlyphSlot glyph = builder->glyph;
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if ( glyph )
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glyph->root.outline = *builder->base;
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}
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/*************************************************************************/
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/* */
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/* <Function> */
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/* CID_Init_Decoder */
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/* */
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/* <Description> */
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/* Initializes a given glyph decoder. */
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/* */
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/* <InOut> */
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/* decoder :: A pointer to the glyph builder to initialize. */
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/* */
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LOCAL_FUNC
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void CID_Init_Decoder( CID_Decoder* decoder )
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{
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MEM_Set( decoder, 0, sizeof ( *decoder ) );
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decoder->font_matrix.xx = 0x10000L;
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decoder->font_matrix.yy = 0x10000L;
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}
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/* check that there is enough room for `count' more points */
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static
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FT_Error check_points( CID_Builder* builder,
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FT_Int count )
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{
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return FT_GlyphLoader_Check_Points( builder->loader, count, 0 );
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}
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/* add a new point, do not check space */
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static
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void add_point( CID_Builder* builder,
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FT_Pos x,
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FT_Pos y,
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FT_Byte flag )
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{
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FT_Outline* outline = builder->current;
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if ( builder->load_points )
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{
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FT_Vector* point = outline->points + outline->n_points;
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FT_Byte* control = (FT_Byte*)outline->tags + outline->n_points;
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point->x = x;
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point->y = y;
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*control = flag ? FT_Curve_Tag_On : FT_Curve_Tag_Cubic;
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builder->last = *point;
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}
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outline->n_points++;
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}
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/* check room for a new on-curve point, then add it */
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static
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FT_Error add_point1( CID_Builder* builder,
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FT_Pos x,
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FT_Pos y )
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{
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FT_Error error;
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error = check_points( builder, 1 );
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if ( !error )
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add_point( builder, x, y, 1 );
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return error;
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}
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/* check room for a new contour, then add it */
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static
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FT_Error add_contour( CID_Builder* builder )
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{
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FT_Outline* outline = builder->current;
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FT_Error error;
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if ( !builder->load_points )
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{
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outline->n_contours++;
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return T1_Err_Ok;
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}
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error = FT_GlyphLoader_Check_Points( builder->loader, 0, 1 );
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if ( !error )
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{
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if ( outline->n_contours > 0 )
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outline->contours[outline->n_contours - 1] = outline->n_points - 1;
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outline->n_contours++;
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}
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return error;
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}
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/* if a path was begun, add its first on-curve point */
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static
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FT_Error start_point( CID_Builder* builder,
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FT_Pos x,
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FT_Pos y )
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{
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/* test whether we are building a new contour */
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if ( !builder->path_begun )
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{
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FT_Error error;
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builder->path_begun = 1;
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error = add_contour( builder );
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if ( error )
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return error;
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}
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return add_point1( builder, x, y );
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}
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/* close the current contour */
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static
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void close_contour( CID_Builder* builder )
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{
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FT_Outline* outline = builder->current;
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if ( outline->n_contours > 0 )
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outline->contours[outline->n_contours - 1] = outline->n_points - 1;
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}
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#if 0
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/*************************************************************************/
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/* */
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/* <Function> */
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/* lookup_glyph_by_stdcharcode */
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/* */
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/* <Description> */
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/* Looks up a given glyph by its StandardEncoding charcode. Used */
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/* to implement the SEAC Type 1 operator. */
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/* */
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/* <Input> */
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/* face :: The current face object. */
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/* */
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/* charcode :: The character code to look for. */
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/* */
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/* <Return> */
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/* A glyph index in the font face. Returns -1 if the corresponding */
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/* glyph wasn't found. */
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/* */
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static
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FT_Int lookup_glyph_by_stdcharcode( CID_Face face,
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FT_Int charcode )
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{
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FT_Int n;
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const FT_String* glyph_name;
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PSNames_Interface* psnames = (PSNames_Interface*)face->psnames;
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/* check range of standard char code */
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if ( charcode < 0 || charcode > 255 )
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return -1;
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glyph_name = psnames->adobe_std_strings(
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psnames->adobe_std_encoding[charcode]);
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for ( n = 0; n < face->cid.cid_count; n++ )
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{
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FT_String* name = (FT_String*)face->type1.glyph_names[n];
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if ( name && strcmp( name, glyph_name ) == 0 )
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return n;
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}
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return -1;
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}
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#endif /* 0 */
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/*************************************************************************/
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/* */
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/* <Function> */
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/* t1operator_seac */
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/* */
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/* <Description> */
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/* Implements the `seac' Type 1 operator for a Type 1 decoder. */
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/* */
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/* <Input> */
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/* decoder :: The current CID decoder. */
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/* */
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/* asb :: The accent's side bearing. */
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/* */
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/* adx :: The horizontal offset of the accent. */
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/* */
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/* ady :: The vertical offset of the accent. */
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/* */
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/* bchar :: The base character's StandardEncoding charcode. */
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/* */
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/* achar :: The accent character's StandardEncoding charcode. */
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/* */
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/* <Return> */
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/* FreeType error code. 0 means success. */
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/* */
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static
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FT_Error t1operator_seac( CID_Decoder* decoder,
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FT_Pos asb,
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FT_Pos adx,
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FT_Pos ady,
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FT_Int bchar,
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FT_Int achar )
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{
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FT_Error error;
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FT_Int bchar_index, achar_index, n_base_points;
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FT_Outline* cur = decoder->builder.current;
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FT_Outline* base = decoder->builder.base;
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FT_Vector left_bearing, advance;
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bchar_index = bchar;
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achar_index = achar;
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if ( bchar_index < 0 || achar_index < 0 )
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{
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FT_ERROR(( "t1operator_seac: invalid seac character code arguments\n" ));
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return T1_Err_Syntax_Error;
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}
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/* if we are trying to load a composite glyph, do not load the */
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/* accent character and return the array of subglyphs. */
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if ( decoder->builder.no_recurse )
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{
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FT_GlyphSlot glyph = (FT_GlyphSlot)decoder->builder.glyph;
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FT_GlyphLoader* loader = glyph->loader;
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FT_SubGlyph* subg;
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/* reallocate subglyph array if necessary */
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error = FT_GlyphLoader_Check_Subglyphs( loader, 2 );
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if ( error )
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goto Exit;
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subg = loader->current.subglyphs;
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/* subglyph 0 = base character */
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subg->index = bchar_index;
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subg->flags = FT_SUBGLYPH_FLAG_ARGS_ARE_XY_VALUES |
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FT_SUBGLYPH_FLAG_USE_MY_METRICS;
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subg->arg1 = 0;
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subg->arg2 = 0;
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subg++;
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/* subglyph 1 = accent character */
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subg->index = achar_index;
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subg->flags = FT_SUBGLYPH_FLAG_ARGS_ARE_XY_VALUES;
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subg->arg1 = adx - asb;
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subg->arg2 = ady;
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/* set up remaining glyph fields */
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glyph->num_subglyphs = 2;
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glyph->format = ft_glyph_format_composite;
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loader->current.num_subglyphs = 2;
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}
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/* First load `bchar' in builder */
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/* now load the unscaled outline */
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if ( decoder->builder.loader )
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FT_GlyphLoader_Prepare( decoder->builder.loader );
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error = cid_load_glyph( decoder, bchar_index ); /* load one glyph */
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if ( error )
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goto Exit;
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n_base_points = cur->n_points;
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{
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/* save the left bearing and width of the base character */
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/* as they will be erased by the next load. */
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left_bearing = decoder->builder.left_bearing;
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advance = decoder->builder.advance;
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decoder->builder.left_bearing.x = 0;
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decoder->builder.left_bearing.y = 0;
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/* Now load `achar' on top of */
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/* the base outline */
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error = cid_load_glyph( decoder, achar_index );
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if ( error )
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return error;
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/* restore the left side bearing and */
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/* advance width of the base character */
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decoder->builder.left_bearing = left_bearing;
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decoder->builder.advance = advance;
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/* Finally, move the accent */
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if ( decoder->builder.load_points )
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{
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FT_Outline dummy;
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|
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dummy.n_points = base->n_points - n_base_points;
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dummy.points = base->points + n_base_points;
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FT_Outline_Translate( &dummy, adx - asb, ady );
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}
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}
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Exit:
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return error;
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}
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|
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#define USE_ARGS( n ) top -= n; \
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if ( top < decoder->stack ) \
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goto Stack_Underflow
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|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* CID_Parse_CharStrings */
|
|
/* */
|
|
/* <Description> */
|
|
/* Parses a given CID charstrings program. */
|
|
/* */
|
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/* <InOut> */
|
|
/* decoder :: The current CID decoder. */
|
|
/* */
|
|
/* <Input> */
|
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/* 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. */
|
|
/* */
|
|
LOCAL_FUNC
|
|
FT_Error CID_Parse_CharStrings( CID_Decoder* decoder,
|
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FT_Byte* charstring_base,
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FT_Int charstring_len )
|
|
{
|
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FT_Error error;
|
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CID_Decoder_Zone* zone;
|
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FT_Byte* ip;
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FT_Byte* limit;
|
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CID_Builder* builder = &decoder->builder;
|
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FT_Outline* outline;
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FT_Pos x, y;
|
|
|
|
|
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/* First of all, initialize the decoder */
|
|
decoder->top = decoder->stack;
|
|
decoder->zone = decoder->zones;
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zone = decoder->zones;
|
|
|
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builder->path_begun = 0;
|
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|
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zone->base = charstring_base;
|
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limit = zone->limit = charstring_base + charstring_len;
|
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ip = zone->cursor = zone->base;
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|
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error = T1_Err_Ok;
|
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outline = builder->current;
|
|
|
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x = builder->pos_x;
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y = builder->pos_y;
|
|
|
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/* now, execute loop */
|
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while ( ip < limit )
|
|
{
|
|
FT_Int* top = decoder->top;
|
|
T1_Operator op = op_none;
|
|
FT_Long value = 0;
|
|
|
|
|
|
/********************************************************************/
|
|
/* */
|
|
/* Decode operator or operand */
|
|
/* */
|
|
|
|
/* First of all, decompress operator or value */
|
|
switch ( *ip++ )
|
|
{
|
|
case 1:
|
|
op = op_hstem;
|
|
break;
|
|
|
|
case 3:
|
|
op = op_vstem;
|
|
break;
|
|
case 4:
|
|
op = op_vmoveto;
|
|
break;
|
|
case 5:
|
|
op = op_rlineto;
|
|
break;
|
|
case 6:
|
|
op = op_hlineto;
|
|
break;
|
|
case 7:
|
|
op = op_vlineto;
|
|
break;
|
|
case 8:
|
|
op = op_rrcurveto;
|
|
break;
|
|
case 9:
|
|
op = op_closepath;
|
|
break;
|
|
case 10:
|
|
op = op_callsubr;
|
|
break;
|
|
case 11:
|
|
op = op_return;
|
|
break;
|
|
|
|
case 13:
|
|
op = op_hsbw;
|
|
break;
|
|
case 14:
|
|
op = op_endchar;
|
|
break;
|
|
|
|
case 21:
|
|
op = op_rmoveto;
|
|
break;
|
|
case 22:
|
|
op = op_hmoveto;
|
|
break;
|
|
|
|
case 30:
|
|
op = op_vhcurveto;
|
|
break;
|
|
case 31:
|
|
op = op_hvcurveto;
|
|
break;
|
|
|
|
case 12:
|
|
if ( ip > limit )
|
|
{
|
|
FT_ERROR(( "CID_Parse_CharStrings: invalid escape (12+EOF)\n" ));
|
|
goto Syntax_Error;
|
|
}
|
|
|
|
switch ( *ip++ )
|
|
{
|
|
case 0:
|
|
op = op_dotsection;
|
|
break;
|
|
case 1:
|
|
op = op_vstem3;
|
|
break;
|
|
case 2:
|
|
op = op_hstem3;
|
|
break;
|
|
case 6:
|
|
op = op_seac;
|
|
break;
|
|
case 7:
|
|
op = op_sbw;
|
|
break;
|
|
case 12:
|
|
op = op_div;
|
|
break;
|
|
case 16:
|
|
op = op_callothersubr;
|
|
break;
|
|
case 17:
|
|
op = op_pop;
|
|
break;
|
|
case 33:
|
|
op = op_setcurrentpoint;
|
|
break;
|
|
|
|
default:
|
|
FT_ERROR(( "CID_Parse_CharStrings: invalid escape (12+%d)\n",
|
|
ip[-1] ));
|
|
goto Syntax_Error;
|
|
}
|
|
break;
|
|
|
|
case 255: /* four bytes integer */
|
|
if ( ip + 4 > limit )
|
|
{
|
|
FT_ERROR(( "CID_Parse_CharStrings: unexpected EOF in integer\n" ));
|
|
goto Syntax_Error;
|
|
}
|
|
|
|
value = ( (long)ip[0] << 24 ) |
|
|
( (long)ip[1] << 16 ) |
|
|
( (long)ip[2] << 8 ) |
|
|
ip[3];
|
|
ip += 4;
|
|
break;
|
|
|
|
default:
|
|
if ( ip[-1] >= 32 )
|
|
{
|
|
if ( ip[-1] < 247 )
|
|
value = (long)ip[-1] - 139;
|
|
else
|
|
{
|
|
if ( ++ip > limit )
|
|
{
|
|
FT_ERROR(( "CID_Parse_CharStrings: unexpected EOF in integer\n" ));
|
|
goto Syntax_Error;
|
|
}
|
|
|
|
if ( ip[-2] < 251 )
|
|
value = ( (long)( ip[-2] - 247 ) << 8 ) + ip[-1] + 108;
|
|
else
|
|
value = -( ( ( (long)ip[-2] - 251 ) << 8 ) + ip[-1] + 108 );
|
|
}
|
|
}
|
|
else
|
|
{
|
|
FT_ERROR(( "CID_Parse_CharStrings: invalid byte (%d)\n",
|
|
ip[-1] ));
|
|
goto Syntax_Error;
|
|
}
|
|
}
|
|
|
|
/********************************************************************/
|
|
/* */
|
|
/* Push value on stack, or process operator */
|
|
/* */
|
|
if ( op == op_none )
|
|
{
|
|
if ( top - decoder->stack >= T1_MAX_CHARSTRINGS_OPERANDS )
|
|
{
|
|
FT_ERROR(( "CID_Parse_CharStrings: Stack overflow!\n" ));
|
|
goto Syntax_Error;
|
|
}
|
|
|
|
FT_TRACE4(( " %ld", value ));
|
|
*top++ = value;
|
|
decoder->top = top;
|
|
}
|
|
else if ( op == op_callothersubr ) /* callothersubr */
|
|
{
|
|
FT_TRACE4(( " callothersubr" ));
|
|
if ( top - decoder->stack < 2 )
|
|
goto Stack_Underflow;
|
|
|
|
top -= 2;
|
|
switch ( top[1] )
|
|
{
|
|
case 1: /* start flex feature ---------------------- */
|
|
if ( top[0] != 0 )
|
|
goto Unexpected_OtherSubr;
|
|
|
|
decoder->flex_state = 1;
|
|
decoder->num_flex_vectors = 0;
|
|
if ( start_point( builder, x, y ) ||
|
|
check_points( builder, 6 ) )
|
|
goto Memory_Error;
|
|
break;
|
|
|
|
case 2: /* add flex vectors ------------------------ */
|
|
{
|
|
FT_Int index;
|
|
|
|
|
|
if ( top[0] != 0 )
|
|
goto Unexpected_OtherSubr;
|
|
|
|
/* note that we should not add a point for index 0. */
|
|
/* this will move our current position to the flex */
|
|
/* point without adding any point to the outline */
|
|
index = decoder->num_flex_vectors++;
|
|
if ( index > 0 && index < 7 )
|
|
add_point( builder,
|
|
x,
|
|
y,
|
|
(FT_Byte)( index==3 || index==6 ) );
|
|
}
|
|
break;
|
|
|
|
case 0: /* end flex feature ------------------------- */
|
|
if ( top[0] != 3 )
|
|
goto Unexpected_OtherSubr;
|
|
|
|
if ( decoder->flex_state == 0 ||
|
|
decoder->num_flex_vectors != 7 )
|
|
{
|
|
FT_ERROR(( "CID)Parse_CharStrings: unexpected flex end\n" ));
|
|
goto Syntax_Error;
|
|
}
|
|
|
|
/* now consume the remaining `pop pop setcurpoint' */
|
|
if ( ip + 6 > limit ||
|
|
ip[0] != 12 || ip[1] != 17 || /* pop */
|
|
ip[2] != 12 || ip[3] != 17 || /* pop */
|
|
ip[4] != 12 || ip[5] != 33 ) /* setcurpoint */
|
|
{
|
|
FT_ERROR(( "CID_Parse_CharStrings: invalid flex charstring\n" ));
|
|
goto Syntax_Error;
|
|
}
|
|
|
|
ip += 6;
|
|
decoder->flex_state = 0;
|
|
break;
|
|
|
|
case 3: /* change hints ---------------------------- */
|
|
if ( top[0] != 1 )
|
|
goto Unexpected_OtherSubr;
|
|
|
|
/* eat the following `pop' */
|
|
if ( ip + 2 > limit )
|
|
{
|
|
FT_ERROR(( "CID_Parse_CharStrings: invalid escape (12+%d)\n",
|
|
ip[-1] ));
|
|
goto Syntax_Error;
|
|
}
|
|
|
|
if ( ip[0] != 12 || ip[1] != 17 )
|
|
{
|
|
FT_ERROR(( "CID_Parse_CharStrings: `pop' expected, found (%d %d)\n",
|
|
ip[0], ip[1] ));
|
|
goto Syntax_Error;
|
|
}
|
|
ip += 2;
|
|
break;
|
|
|
|
case 12:
|
|
case 13:
|
|
/* counter control hints, clear stack */
|
|
top = decoder->stack;
|
|
break;
|
|
|
|
#if 0
|
|
|
|
case 14:
|
|
case 15:
|
|
case 16:
|
|
case 17:
|
|
case 18: /* multiple masters */
|
|
{
|
|
T1_Blend* blend = decoder->blend;
|
|
FT_UInt num_points, nn, mm;
|
|
FT_Int* delta;
|
|
FT_Int* values;
|
|
|
|
if ( !blend )
|
|
{
|
|
FT_ERROR(( "CID_Parse_CharStrings: unexpected multiple masters operator!\n" ));
|
|
goto Syntax_Error;
|
|
}
|
|
|
|
num_points = top[1] - 13 + ( top[1] == 18 );
|
|
if ( top[0] != num_points * blend->num_designs )
|
|
{
|
|
FT_ERROR(( "CID_Parse_CharStrings: incorrect number of mm arguments\n" ));
|
|
goto Syntax_Error;
|
|
}
|
|
|
|
top -= blend->num_designs * num_points;
|
|
if ( top < decoder->stack )
|
|
goto Stack_Underflow;
|
|
|
|
/* we want to compute: */
|
|
/* */
|
|
/* a0*w0 + a1*w1 + ... + ak*wk */
|
|
/* */
|
|
/* but we only have the a0, a1-a0, a2-a0, .. ak-a0 */
|
|
/* however, given that w0 + w1 + ... + wk == 1, we can */
|
|
/* rewrite it easily as: */
|
|
/* */
|
|
/* a0 + (a1-a0)*w1 + (a2-a0)*w2 + .. + (ak-a0)*wk */
|
|
/* */
|
|
/* where k == num_designs-1 */
|
|
/* */
|
|
/* I guess that's why it's written in this `compact' */
|
|
/* form... */
|
|
/* */
|
|
/* */
|
|
delta = top + num_points;
|
|
values = top;
|
|
for ( nn = 0; nn < num_points; nn++ )
|
|
{
|
|
FT_Int x = values[0];
|
|
|
|
|
|
for ( mm = 1; mm < blend->num_designs; mm++ )
|
|
x += FT_MulFix( *delta++, blend->weight_vector[mm] );
|
|
|
|
*values++ = x;
|
|
}
|
|
/* note that `top' will be incremented later by calls to `pop' */
|
|
}
|
|
break;
|
|
|
|
#endif
|
|
|
|
default:
|
|
Unexpected_OtherSubr:
|
|
FT_ERROR(( "CID_Parse_CharStrings: invalid othersubr [%d %d]!\n",
|
|
top[0], top[1] ));
|
|
goto Syntax_Error;
|
|
}
|
|
decoder->top = top;
|
|
}
|
|
else /* general operator */
|
|
{
|
|
FT_Int num_args = t1_args_count[op];
|
|
|
|
|
|
if ( top - decoder->stack < num_args )
|
|
goto Stack_Underflow;
|
|
|
|
top -= num_args;
|
|
|
|
switch ( op )
|
|
{
|
|
case op_endchar:
|
|
FT_TRACE4(( " endchar" ));
|
|
|
|
close_contour( builder );
|
|
|
|
/* add current outline to the glyph slot */
|
|
FT_GlyphLoader_Add( builder->loader );
|
|
|
|
/* return now! */
|
|
FT_TRACE4(( "\n\n" ));
|
|
return T1_Err_Ok;
|
|
|
|
case op_hsbw:
|
|
FT_TRACE4(( " hsbw" ));
|
|
|
|
builder->left_bearing.x += top[0];
|
|
builder->advance.x = top[1];
|
|
builder->advance.y = 0;
|
|
|
|
builder->last.x = x = top[0];
|
|
builder->last.y = y = 0;
|
|
|
|
/* the `metrics_only' indicates that we only want to compute */
|
|
/* the glyph's metrics (lsb + advance width), not load the */
|
|
/* rest of it. So exit immediately. */
|
|
if ( builder->metrics_only )
|
|
return T1_Err_Ok;
|
|
|
|
break;
|
|
|
|
case op_seac:
|
|
/* return immediately after the processing */
|
|
return t1operator_seac( decoder, top[0], top[1],
|
|
top[2], top[3], top[4] );
|
|
|
|
case op_sbw:
|
|
FT_TRACE4(( " sbw" ));
|
|
|
|
builder->left_bearing.x += top[0];
|
|
builder->left_bearing.y += top[1];
|
|
builder->advance.x = top[2];
|
|
builder->advance.y = top[3];
|
|
|
|
builder->last.x = x = top[0];
|
|
builder->last.y = y = top[1];
|
|
|
|
/* the `metrics_only' indicates that we only want to compute */
|
|
/* the glyph's metrics (lsb + advance width), not load the */
|
|
/* rest of it. So exit immediately. */
|
|
if ( builder->metrics_only )
|
|
return T1_Err_Ok;
|
|
|
|
break;
|
|
|
|
case op_closepath:
|
|
FT_TRACE4(( " closepath" ));
|
|
|
|
close_contour( builder );
|
|
builder->path_begun = 0;
|
|
break;
|
|
|
|
case op_hlineto:
|
|
FT_TRACE4(( " hlineto" ));
|
|
|
|
if ( start_point( builder, x, y ) )
|
|
goto Memory_Error;
|
|
|
|
x += top[0];
|
|
goto Add_Line;
|
|
|
|
case op_hmoveto:
|
|
FT_TRACE4(( " hmoveto" ));
|
|
|
|
x += top[0];
|
|
break;
|
|
|
|
case op_hvcurveto:
|
|
FT_TRACE4(( " hvcurveto" ));
|
|
|
|
if ( start_point( builder, x, y ) ||
|
|
check_points( builder, 3 ) )
|
|
goto Memory_Error;
|
|
|
|
x += top[0];
|
|
add_point( builder, x, y, 0 );
|
|
|
|
x += top[1];
|
|
y += top[2];
|
|
add_point( builder, x, y, 0 );
|
|
|
|
y += top[3];
|
|
add_point( builder, x, y, 1 );
|
|
|
|
break;
|
|
|
|
case op_rlineto:
|
|
FT_TRACE4(( " rlineto" ));
|
|
|
|
if ( start_point( builder, x, y ) )
|
|
goto Memory_Error;
|
|
|
|
x += top[0];
|
|
y += top[1];
|
|
|
|
Add_Line:
|
|
if ( add_point1( builder, x, y ) )
|
|
goto Memory_Error;
|
|
break;
|
|
|
|
case op_rmoveto:
|
|
FT_TRACE4(( " rmoveto" ));
|
|
|
|
x += top[0];
|
|
y += top[1];
|
|
break;
|
|
|
|
case op_rrcurveto:
|
|
FT_TRACE4(( " rcurveto" ));
|
|
|
|
if ( start_point( builder, x, y ) ||
|
|
check_points( builder, 3 ) )
|
|
goto Memory_Error;
|
|
|
|
x += top[0];
|
|
y += top[1];
|
|
add_point( builder, x, y, 0 );
|
|
|
|
x += top[2];
|
|
y += top[3];
|
|
add_point( builder, x, y, 0 );
|
|
|
|
x += top[4];
|
|
y += top[5];
|
|
add_point( builder, x, y, 1 );
|
|
|
|
break;
|
|
|
|
case op_vhcurveto:
|
|
FT_TRACE4(( " vhcurveto" ));
|
|
if ( start_point( builder, x, y ) ||
|
|
check_points( builder, 3 ) )
|
|
goto Memory_Error;
|
|
|
|
y += top[0];
|
|
add_point( builder, x, y, 0 );
|
|
|
|
x += top[1];
|
|
y += top[2];
|
|
add_point( builder, x, y, 0 );
|
|
|
|
x += top[3];
|
|
add_point( builder, x, y, 1 );
|
|
|
|
break;
|
|
|
|
case op_vlineto:
|
|
FT_TRACE4(( " vlineto" ));
|
|
|
|
if ( start_point( builder, x, y ) )
|
|
goto Memory_Error;
|
|
|
|
y += top[0];
|
|
goto Add_Line;
|
|
|
|
case op_vmoveto:
|
|
FT_TRACE4(( " vmoveto" ));
|
|
|
|
y += top[0];
|
|
break;
|
|
|
|
case op_div:
|
|
FT_TRACE4(( " div" ));
|
|
|
|
if ( top[1] )
|
|
*top++ = top[0] / top[1];
|
|
else
|
|
{
|
|
FT_ERROR(( "CID_Parse_CharStrings: division by 0\n" ));
|
|
goto Syntax_Error;
|
|
}
|
|
break;
|
|
|
|
case op_callsubr:
|
|
{
|
|
FT_Int index;
|
|
|
|
|
|
FT_TRACE4(( " callsubr" ));
|
|
|
|
index = top[0];
|
|
if ( index < 0 || index >= decoder->subrs->num_subrs )
|
|
{
|
|
FT_ERROR(( "CID_Parse_CharStrings: invalid subrs index\n" ));
|
|
goto Syntax_Error;
|
|
}
|
|
|
|
if ( zone - decoder->zones >= T1_MAX_SUBRS_CALLS )
|
|
{
|
|
FT_ERROR(( "CID_Parse_CharStrings: too many nested subrs\n" ));
|
|
goto Syntax_Error;
|
|
}
|
|
|
|
zone->cursor = ip; /* save current instruction pointer */
|
|
|
|
zone++;
|
|
zone->base = decoder->subrs->code[index] + decoder->lenIV;
|
|
zone->limit = decoder->subrs->code[index + 1];
|
|
zone->cursor = zone->base;
|
|
|
|
if ( !zone->base )
|
|
{
|
|
FT_ERROR(( "CID_Parse_CharStrings: invoking empty subrs!\n" ));
|
|
goto Syntax_Error;
|
|
}
|
|
|
|
decoder->zone = zone;
|
|
ip = zone->base;
|
|
limit = zone->limit;
|
|
}
|
|
break;
|
|
|
|
case op_pop:
|
|
FT_TRACE4(( " pop" ));
|
|
|
|
/* theorically, the arguments are already on the stack */
|
|
top++;
|
|
break;
|
|
|
|
case op_return:
|
|
FT_TRACE4(( " return" ));
|
|
|
|
if ( zone <= decoder->zones )
|
|
{
|
|
FT_ERROR(( "CID_Parse_CharStrings: unexpected return\n" ));
|
|
goto Syntax_Error;
|
|
}
|
|
|
|
zone--;
|
|
ip = zone->cursor;
|
|
limit = zone->limit;
|
|
decoder->zone = zone;
|
|
|
|
break;
|
|
|
|
case op_dotsection:
|
|
FT_TRACE4(( " dotsection" ));
|
|
|
|
break;
|
|
|
|
case op_hstem:
|
|
FT_TRACE4(( " hstem" ));
|
|
|
|
break;
|
|
|
|
case op_hstem3:
|
|
FT_TRACE4(( " hstem3" ));
|
|
|
|
break;
|
|
|
|
case op_vstem:
|
|
FT_TRACE4(( " vstem" ));
|
|
|
|
break;
|
|
|
|
case op_vstem3:
|
|
FT_TRACE4(( " vstem3" ));
|
|
|
|
break;
|
|
|
|
case op_setcurrentpoint:
|
|
FT_TRACE4(( " setcurrentpoint" ));
|
|
|
|
FT_ERROR(( "CID_Parse_CharStrings: unexpected `setcurrentpoint'\n" ));
|
|
goto Syntax_Error;
|
|
|
|
default:
|
|
FT_ERROR(( "CID_Parse_CharStrings: unhandled opcode %d\n", op ));
|
|
goto Syntax_Error;
|
|
}
|
|
|
|
decoder->top = top;
|
|
|
|
} /* general operator processing */
|
|
|
|
} /* while ip < limit */
|
|
|
|
FT_TRACE4(( "..end..\n\n" ));
|
|
|
|
return error;
|
|
|
|
Syntax_Error:
|
|
return T1_Err_Syntax_Error;
|
|
|
|
Stack_Underflow:
|
|
return T1_Err_Stack_Underflow;
|
|
|
|
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
|
|
|
|
|
|
LOCAL_FUNC
|
|
FT_Error CID_Compute_Max_Advance( CID_Face face,
|
|
FT_Int* max_advance )
|
|
{
|
|
FT_Error error;
|
|
CID_Decoder decoder;
|
|
FT_Int glyph_index;
|
|
|
|
|
|
*max_advance = 0;
|
|
|
|
/* Initialize load decoder */
|
|
CID_Init_Decoder( &decoder );
|
|
CID_Init_Builder( &decoder.builder, 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++ )
|
|
{
|
|
/* now get load the unscaled outline */
|
|
error = cid_load_glyph( &decoder, glyph_index );
|
|
/* ignore the error if one occured - skip to next glyph */
|
|
}
|
|
|
|
*max_advance = decoder.builder.advance.x;
|
|
|
|
return T1_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. *********/
|
|
/********** *********/
|
|
/*************************************************************************/
|
|
/*************************************************************************/
|
|
/*************************************************************************/
|
|
|
|
|
|
static
|
|
FT_Error cid_load_glyph( CID_Decoder* decoder,
|
|
FT_UInt glyph_index )
|
|
{
|
|
CID_Face face = decoder->builder.face;
|
|
CID_Info* cid = &face->cid;
|
|
FT_Byte* p;
|
|
FT_UInt entry_len = cid->fd_bytes + cid->gd_bytes;
|
|
FT_UInt fd_select;
|
|
FT_ULong off1, glyph_len;
|
|
FT_Stream stream = face->root.stream;
|
|
FT_Error error = 0;
|
|
|
|
|
|
/* read the CID font dict index and charstring offset from the CIDMap */
|
|
if ( FILE_Seek( cid->data_offset + cid->cidmap_offset +
|
|
glyph_index * entry_len) ||
|
|
ACCESS_Frame( 2 * entry_len ) )
|
|
goto Exit;
|
|
|
|
p = (FT_Byte*)stream->cursor;
|
|
fd_select = (FT_UInt) cid_get_offset( &p, cid->fd_bytes );
|
|
off1 = (FT_ULong)cid_get_offset( &p, cid->gd_bytes );
|
|
p += cid->fd_bytes;
|
|
glyph_len = cid_get_offset( &p, cid->gd_bytes ) - off1;
|
|
|
|
FORGET_Frame();
|
|
|
|
/* now, if the glyph is not empty, set up the subrs array, and parse */
|
|
/* the charstrings */
|
|
if ( glyph_len > 0 )
|
|
{
|
|
CID_FontDict* dict;
|
|
FT_Byte* charstring;
|
|
FT_UInt lenIV;
|
|
FT_Memory memory = face->root.memory;
|
|
|
|
|
|
/* setup subrs */
|
|
decoder->subrs = face->subrs + fd_select;
|
|
|
|
/* setup font matrix */
|
|
dict = cid->font_dicts + fd_select;
|
|
decoder->font_matrix = dict->font_matrix;
|
|
lenIV = dict->private_dict.lenIV;
|
|
decoder->lenIV = lenIV;
|
|
|
|
/* the charstrings are encoded (stupid!) */
|
|
/* load the charstrings, then execute it */
|
|
|
|
if ( ALLOC( charstring, glyph_len ) )
|
|
goto Exit;
|
|
|
|
if ( !FILE_Read_At( cid->data_offset + off1, charstring, glyph_len ) )
|
|
{
|
|
cid_decrypt( charstring, glyph_len, 4330 );
|
|
error = CID_Parse_CharStrings( decoder,
|
|
charstring + lenIV,
|
|
glyph_len - lenIV );
|
|
}
|
|
|
|
FREE( charstring );
|
|
}
|
|
|
|
Exit:
|
|
return error;
|
|
}
|
|
|
|
|
|
|
|
LOCAL_FUNC
|
|
FT_Error CID_Load_Glyph( T1_GlyphSlot glyph,
|
|
T1_Size size,
|
|
FT_Int glyph_index,
|
|
FT_Int load_flags )
|
|
{
|
|
FT_Error error;
|
|
CID_Decoder decoder;
|
|
CID_Face face = (CID_Face)glyph->root.face;
|
|
FT_Bool hinting;
|
|
|
|
|
|
if ( load_flags & FT_LOAD_NO_RECURSE )
|
|
load_flags |= FT_LOAD_NO_SCALE | FT_LOAD_NO_HINTING;
|
|
|
|
glyph->x_scale = size->root.metrics.x_scale;
|
|
glyph->y_scale = size->root.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_none;
|
|
|
|
{
|
|
CID_Init_Decoder( &decoder );
|
|
CID_Init_Builder( &decoder.builder, face, size, glyph );
|
|
|
|
/* set up the decoder */
|
|
decoder.builder.no_recurse =
|
|
(FT_Bool)( load_flags & FT_LOAD_NO_RECURSE );
|
|
|
|
error = cid_load_glyph( &decoder, glyph_index );
|
|
|
|
/* save new glyph tables */
|
|
CID_Done_Builder( &decoder.builder );
|
|
}
|
|
|
|
/* 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 the left side bearing and the */
|
|
/* advance width.. */
|
|
if ( load_flags & FT_LOAD_NO_RECURSE )
|
|
{
|
|
glyph->root.metrics.horiBearingX = decoder.builder.left_bearing.x;
|
|
glyph->root.metrics.horiAdvance = decoder.builder.advance.x;
|
|
}
|
|
else
|
|
{
|
|
FT_BBox cbox;
|
|
FT_Glyph_Metrics* metrics = &glyph->root.metrics;
|
|
|
|
|
|
/* copy the _unscaled_ advance width */
|
|
metrics->horiAdvance = decoder.builder.advance.x;
|
|
|
|
/* make up vertical metrics */
|
|
metrics->vertBearingX = 0;
|
|
metrics->vertBearingY = 0;
|
|
metrics->vertAdvance = 0;
|
|
|
|
glyph->root.format = ft_glyph_format_outline;
|
|
|
|
glyph->root.outline.flags &= ft_outline_owner;
|
|
if ( size && size->root.metrics.y_ppem < 24 )
|
|
glyph->root.outline.flags |= ft_outline_high_precision;
|
|
|
|
glyph->root.outline.flags |= ft_outline_reverse_fill;
|
|
|
|
#if 0
|
|
glyph->root.outline.second_pass = TRUE;
|
|
glyph->root.outline.high_precision = size->root.metrics.y_ppem < 24;
|
|
glyph->root.outline.dropout_mode = 2;
|
|
#endif
|
|
|
|
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->vertBearingX = FT_MulFix( metrics->vertBearingX, x_scale );
|
|
metrics->vertBearingY = FT_MulFix( metrics->vertBearingY, y_scale );
|
|
metrics->vertAdvance = FT_MulFix( metrics->vertAdvance, x_scale );
|
|
}
|
|
|
|
/* apply the font matrix */
|
|
FT_Outline_Transform( &glyph->root.outline, &decoder.font_matrix );
|
|
|
|
/* 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 */
|