/***************************************************************************//*                                                                         *//*  cidgload.c                                                             *//*                                                                         *//*    CID-keyed Type1 Glyph Loader (body).                                 *//*                                                                         *//*  Copyright 1996-2001, 2002, 2003, 2004, 2005, 2006 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 "cidload.h"#include "cidgload.h"#include FT_INTERNAL_DEBUG_H#include FT_INTERNAL_STREAM_H#include FT_OUTLINE_H#include "ciderrs.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_cidgload  FT_CALLBACK_DEF( FT_Error )  cid_load_glyph( T1_Decoder  decoder,                  FT_UInt     glyph_index )  {    CID_Face       face = (CID_Face)decoder->builder.face;    CID_FaceInfo   cid  = &face->cid;    FT_Byte*       p;    FT_UInt        fd_select;    FT_Stream      stream = face->cid_stream;    FT_Error       error  = 0;    FT_Byte*       charstring = 0;    FT_Memory      memory = face->root.memory;    FT_ULong       glyph_length = 0;    PSAux_Service  psaux = (PSAux_Service)face->psaux;#ifdef FT_CONFIG_OPTION_INCREMENTAL    /* For incremental fonts get the character data using */    /* the callback function.                             */    if ( face->root.internal->incremental_interface )    {      FT_Data  glyph_data;      error = face->root.internal->incremental_interface->funcs->get_glyph_data(                face->root.internal->incremental_interface->object,                glyph_index,                &glyph_data );      if ( error )        goto Exit;      p         = (FT_Byte*)glyph_data.pointer;      fd_select = (FT_UInt)cid_get_offset( &p, (FT_Byte)cid->fd_bytes );      if ( glyph_data.length != 0 )      {        glyph_length = glyph_data.length - cid->fd_bytes;        FT_ALLOC( charstring, glyph_length );        if ( !error )          ft_memcpy( charstring, glyph_data.pointer + cid->fd_bytes,                     glyph_length );      }      face->root.internal->incremental_interface->funcs->free_glyph_data(                face->root.internal->incremental_interface->object,                &glyph_data );      if ( error )        goto Exit;    }    else#endif /* FT_CONFIG_OPTION_INCREMENTAL */    /* For ordinary fonts read the CID font dictionary index */    /* and charstring offset from the CIDMap.                */    {      FT_UInt   entry_len = cid->fd_bytes + cid->gd_bytes;      FT_ULong  off1;      if ( FT_STREAM_SEEK( cid->data_offset + cid->cidmap_offset +                           glyph_index * entry_len )               ||           FT_FRAME_ENTER( 2 * entry_len )                         )        goto Exit;      p            = (FT_Byte*)stream->cursor;      fd_select    = (FT_UInt) cid_get_offset( &p, (FT_Byte)cid->fd_bytes );      off1         = (FT_ULong)cid_get_offset( &p, (FT_Byte)cid->gd_bytes );      p           += cid->fd_bytes;      glyph_length = cid_get_offset( &p, (FT_Byte)cid->gd_bytes ) - off1;      FT_FRAME_EXIT();      if ( glyph_length == 0 )        goto Exit;      if ( FT_ALLOC( charstring, glyph_length ) )        goto Exit;      if ( FT_STREAM_READ_AT( cid->data_offset + off1,                              charstring, glyph_length ) )        goto Exit;    }    /* Now set up the subrs array and parse the charstrings. */    {      CID_FaceDict  dict;      CID_Subrs     cid_subrs = face->subrs + fd_select;      FT_Int        cs_offset;      /* Set up subrs */      decoder->num_subrs = cid_subrs->num_subrs;      decoder->subrs     = cid_subrs->code;      decoder->subrs_len = 0;      /* Set up font matrix */      dict                 = cid->font_dicts + fd_select;      decoder->font_matrix = dict->font_matrix;      decoder->font_offset = dict->font_offset;      decoder->lenIV       = dict->private_dict.lenIV;      /* Decode the charstring. */      /* Adjustment for seed bytes. */      cs_offset = ( decoder->lenIV >= 0 ? decoder->lenIV : 0 );      /* Decrypt only if lenIV >= 0. */      if ( decoder->lenIV >= 0 )        psaux->t1_decrypt( charstring, glyph_length, 4330 );      error = decoder->funcs.parse_charstrings(                decoder, charstring + cs_offset,                (FT_Int)glyph_length - cs_offset  );    }    FT_FREE( charstring );#ifdef FT_CONFIG_OPTION_INCREMENTAL    /* Incremental fonts can optionally override the metrics. */    if ( !error                                                              &&         face->root.internal->incremental_interface                          &&         face->root.internal->incremental_interface->funcs->get_glyph_metrics )    {      FT_Incremental_MetricsRec  metrics;      metrics.bearing_x = decoder->builder.left_bearing.x;      metrics.bearing_y = decoder->builder.left_bearing.y;      metrics.advance   = decoder->builder.advance.x;      error = face->root.internal->incremental_interface->funcs->get_glyph_metrics(                face->root.internal->incremental_interface->object,                glyph_index, FALSE, &metrics );      decoder->builder.left_bearing.x = metrics.bearing_x;      decoder->builder.left_bearing.y = metrics.bearing_y;      decoder->builder.advance.x      = metrics.advance;      decoder->builder.advance.y      = 0;    }#endif /* FT_CONFIG_OPTION_INCREMENTAL */  Exit:    return error;  }#if 0  /*************************************************************************/  /*************************************************************************/  /*************************************************************************/  /**********                                                      *********/  /**********                                                      *********/  /**********            COMPUTE THE MAXIMUM ADVANCE WIDTH         *********/  /**********                                                      *********/  /**********    The following code is in charge of computing      *********/  /**********    the maximum advance width of the font.  It        *********/  /**********    quickly processes each glyph charstring to        *********/  /**********    extract the value from either a `sbw' or `seac'   *********/  /**********    operator.                                         *********/  /**********                                                      *********/  /*************************************************************************/  /*************************************************************************/  /*************************************************************************/  FT_LOCAL_DEF( FT_Error )  cid_face_compute_max_advance( CID_Face  face,                                FT_Int*   max_advance )  {    FT_Error       error;    T1_DecoderRec  decoder;    FT_Int         glyph_index;    PSAux_Service  psaux = (PSAux_Service)face->psaux;    *max_advance = 0;    /* Initialize load decoder */    error = psaux->t1_decoder_funcs->init( &decoder,                                           (FT_Face)face,                                           0, /* size       */                                           0, /* glyph slot */                                           0, /* glyph names! XXX */                                           0, /* blend == 0 */                                           0, /* hinting == 0 */                                           cid_load_glyph );    if ( error )      return error;    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 occurred - skip to next glyph */    }    *max_advance = decoder.builder.advance.x;    return CID_Err_Ok;  }#endif /* 0 */  FT_LOCAL_DEF( FT_Error )  cid_slot_load_glyph( FT_GlyphSlot  cidglyph,      /* CID_GlyphSlot */                       FT_Size       cidsize,       /* CID_Size      */                       FT_UInt       glyph_index,                       FT_Int32      load_flags )  {    CID_GlyphSlot  glyph = (CID_GlyphSlot)cidglyph;    CID_Size       size  = (CID_Size)cidsize;    FT_Error       error;    T1_DecoderRec  decoder;    CID_Face       face = (CID_Face)cidglyph->face;    FT_Bool        hinting;    PSAux_Service  psaux = (PSAux_Service)face->psaux;    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 = cidsize->metrics.x_scale;    glyph->y_scale = cidsize->metrics.y_scale;    cidglyph->outline.n_points   = 0;    cidglyph->outline.n_contours = 0;    hinting = FT_BOOL( ( load_flags & FT_LOAD_NO_SCALE   ) == 0 &&                       ( load_flags & FT_LOAD_NO_HINTING ) == 0 );    cidglyph->format = FT_GLYPH_FORMAT_OUTLINE;    {      error = psaux->t1_decoder_funcs->init( &decoder,                                             cidglyph->face,                                             cidsize,                                             cidglyph,                                             0, /* glyph names -- XXX */                                             0, /* blend == 0 */                                             hinting,                                             FT_LOAD_TARGET_MODE( load_flags ),                                             cid_load_glyph );      /* set up the decoder */      decoder.builder.no_recurse = FT_BOOL(        ( ( load_flags & FT_LOAD_NO_RECURSE ) != 0 ) );      error = cid_load_glyph( &decoder, glyph_index );      font_matrix = decoder.font_matrix;      font_offset = decoder.font_offset;      /* save new glyph tables */      psaux->t1_decoder_funcs->done( &decoder );    }    /* 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 )    {      cidglyph->outline.flags &= FT_OUTLINE_OWNER;      cidglyph->outline.flags |= FT_OUTLINE_REVERSE_FILL;      /* for composite glyphs, return only left side bearing and */      /* advance width                                           */      if ( load_flags & FT_LOAD_NO_RECURSE )      {        FT_Slot_Internal  internal = cidglyph->internal;        cidglyph->metrics.horiBearingX = decoder.builder.left_bearing.x;        cidglyph->metrics.horiAdvance  = decoder.builder.advance.x;        internal->glyph_matrix         = font_matrix;        internal->glyph_delta          = font_offset;        internal->glyph_transformed    = 1;      }      else      {        FT_BBox            cbox;        FT_Glyph_Metrics*  metrics = &cidglyph->metrics;        FT_Vector          advance;        /* copy the _unscaled_ advance width */        metrics->horiAdvance                  = decoder.builder.advance.x;        cidglyph->linearHoriAdvance           = decoder.builder.advance.x;        cidglyph->internal->glyph_transformed = 0;        /* make up vertical ones */        metrics->vertAdvance        = ( face->cid.font_bbox.yMax -                                        face->cid.font_bbox.yMin ) >> 16;        cidglyph->linearVertAdvance = metrics->vertAdvance;        cidglyph->format            = FT_GLYPH_FORMAT_OUTLINE;        if ( size && cidsize->metrics.y_ppem < 24 )          cidglyph->outline.flags |= FT_OUTLINE_HIGH_PRECISION;        /* apply the font matrix */        FT_Outline_Transform( &cidglyph->outline, &font_matrix );        FT_Outline_Translate( &cidglyph->outline,                              font_offset.x,                              font_offset.y );        advance.x = metrics->horiAdvance;        advance.y = 0;        FT_Vector_Transform( &advance, &font_matrix );        metrics->horiAdvance = advance.x + font_offset.x;        advance.x = 0;        advance.y = metrics->vertAdvance;        FT_Vector_Transform( &advance, &font_matrix );        metrics->vertAdvance = advance.y + font_offset.y;        if ( ( load_flags & FT_LOAD_NO_SCALE ) == 0 )        {          /* scale the outline and the metrics */          FT_Int       n;          FT_Outline*  cur = decoder.builder.base;          FT_Vector*   vec = cur->points;          FT_Fixed     x_scale = glyph->x_scale;          FT_Fixed     y_scale = glyph->y_scale;          /* First of all, scale the points */          if ( !hinting || !decoder.builder.hints_funcs )            for ( n = cur->n_points; n > 0; n--, vec++ )            {              vec->x = FT_MulFix( vec->x, x_scale );              vec->y = FT_MulFix( vec->y, y_scale );            }          /* Then scale the metrics */          metrics->horiAdvance  = FT_MulFix( metrics->horiAdvance,  x_scale );          metrics->vertAdvance  = FT_MulFix( metrics->vertAdvance,  y_scale );        }        /* compute the other metrics */        FT_Outline_Get_CBox( &cidglyph->outline, &cbox );        metrics->width  = cbox.xMax - cbox.xMin;        metrics->height = cbox.yMax - cbox.yMin;        metrics->horiBearingX = cbox.xMin;        metrics->horiBearingY = cbox.yMax;        /* make up vertical ones */        ft_synthesize_vertical_metrics( metrics,                                        metrics->vertAdvance );      }    }    return error;  }/* END */