t1gload.c

奇趣公司比较新的qt/emd版本

    T1_Face                 face = (T1_Face)glyph->root.face;
    FT_Bool                 hinting;
    T1_Font                 type1         = &face->type1;
    PSAux_Service           psaux         = (PSAux_Service)face->psaux;
    const T1_Decoder_Funcs  decoder_funcs = psaux->t1_decoder_funcs;

    FT_Matrix               font_matrix;
    FT_Vector               font_offset;
    FT_Data                 glyph_data;
    FT_Bool                 must_finish_decoder = FALSE;
#ifdef FT_CONFIG_OPTION_INCREMENTAL
    FT_Bool                 glyph_data_loaded = 0;
#endif


    if ( glyph_index >= (FT_UInt)face->root.num_glyphs )
    {
      error = T1_Err_Invalid_Argument;
      goto Exit;
    }

    FT_ASSERT( ( face->len_buildchar == 0 ) == ( face->buildchar == NULL ) );

    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 = FT_BOOL( ( load_flags & FT_LOAD_NO_SCALE   ) == 0 &&
                       ( load_flags & FT_LOAD_NO_HINTING ) == 0 );

    glyph->root.format = FT_GLYPH_FORMAT_OUTLINE;

    error = decoder_funcs->init( &decoder,
                                 (FT_Face)face,
                                 (FT_Size)size,
                                 (FT_GlyphSlot)glyph,
                                 (FT_Byte**)type1->glyph_names,
                                 face->blend,
                                 FT_BOOL( hinting ),
                                 FT_LOAD_TARGET_MODE( load_flags ),
                                 T1_Parse_Glyph );
    if ( error )
      goto Exit;

    must_finish_decoder = TRUE;

    decoder.builder.no_recurse = FT_BOOL(
                                   ( load_flags & FT_LOAD_NO_RECURSE ) != 0 );

    decoder.num_subrs     = type1->num_subrs;
    decoder.subrs         = type1->subrs;
    decoder.subrs_len     = type1->subrs_len;

    decoder.buildchar     = face->buildchar;
    decoder.len_buildchar = face->len_buildchar;

    /* now load the unscaled outline */
    error = T1_Parse_Glyph_And_Get_Char_String( &decoder, glyph_index,
                                                &glyph_data );
    if ( error )
      goto Exit;
#ifdef FT_CONFIG_OPTION_INCREMENTAL
    glyph_data_loaded = 1;
#endif

    font_matrix = decoder.font_matrix;
    font_offset = decoder.font_offset;

    /* save new glyph tables */
    decoder_funcs->done( &decoder );

    must_finish_decoder = FALSE;

    /* 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 )
    {
      glyph->root.outline.flags &= FT_OUTLINE_OWNER;
      glyph->root.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 = glyph->root.internal;


        glyph->root.metrics.horiBearingX = decoder.builder.left_bearing.x;
        glyph->root.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 = &glyph->root.metrics;
        FT_Vector          advance;


        /* copy the _unscaled_ advance width */
        metrics->horiAdvance                    = decoder.builder.advance.x;
        glyph->root.linearHoriAdvance           = decoder.builder.advance.x;
        glyph->root.internal->glyph_transformed = 0;

        /* make up vertical ones */
        metrics->vertAdvance = ( face->type1.font_bbox.yMax -
                                 face->type1.font_bbox.yMin ) >> 16;
        glyph->root.linearVertAdvance = metrics->vertAdvance;

        glyph->root.format = FT_GLYPH_FORMAT_OUTLINE;

        if ( size && size->root.metrics.y_ppem < 24 )
          glyph->root.outline.flags |= FT_OUTLINE_HIGH_PRECISION;

#if 1
        /* apply the font matrix, if any */
        if ( font_matrix.xx != 0x10000L || font_matrix.yy != font_matrix.xx ||
             font_matrix.xy != 0        || font_matrix.yx != 0              )
          FT_Outline_Transform( &glyph->root.outline, &font_matrix );

        if ( font_offset.x || font_offset.y )
          FT_Outline_Translate( &glyph->root.outline,
                                font_offset.x,
                                font_offset.y );

        advance.x = metrics->horiAdvance;
        advance.y = 0;
        FT_Vector_Transform( &advance, &font_matrix );
        metrics->horiAdvance = advance.x + font_offset.x;
        advance.x = 0;
        advance.y = metrics->vertAdvance;
        FT_Vector_Transform( &advance, &font_matrix );
        metrics->vertAdvance = advance.y + font_offset.y;
#endif

        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 we are not hinting */
          if ( !hinting || ! decoder.builder.hints_funcs )
            for ( n = cur->n_points; n > 0; n--, vec++ )
            {
              vec->x = FT_MulFix( vec->x, x_scale );
              vec->y = FT_MulFix( vec->y, y_scale );
            }

          /* Then scale the metrics */
          metrics->horiAdvance  = FT_MulFix( metrics->horiAdvance,  x_scale );
          metrics->vertAdvance  = FT_MulFix( metrics->vertAdvance,  y_scale );
        }

        /* compute the other metrics */
        FT_Outline_Get_CBox( &glyph->root.outline, &cbox );

        metrics->width  = cbox.xMax - cbox.xMin;
        metrics->height = cbox.yMax - cbox.yMin;

        metrics->horiBearingX = cbox.xMin;
        metrics->horiBearingY = cbox.yMax;

        /* make up vertical ones */
        ft_synthesize_vertical_metrics( metrics,
                                        metrics->vertAdvance );
      }

      /* Set control data to the glyph charstrings.  Note that this is */
      /* _not_ zero-terminated.                                        */
      glyph->root.control_data = (FT_Byte*)glyph_data.pointer;
      glyph->root.control_len  = glyph_data.length;
    }


  Exit:

#ifdef FT_CONFIG_OPTION_INCREMENTAL
    if ( glyph_data_loaded && face->root.internal->incremental_interface )
    {
      face->root.internal->incremental_interface->funcs->free_glyph_data(
        face->root.internal->incremental_interface->object,
        &glyph_data );

      /* Set the control data to null - it is no longer available if   */
      /* loaded incrementally.                                         */
      glyph->root.control_data = 0;
      glyph->root.control_len  = 0;
    }
#endif

    if ( must_finish_decoder )
      decoder_funcs->done( &decoder );

    return error;
  }


/* END */