Пример #1
0
  af_loader_load_glyph( AF_Loader  loader,
                        FT_Face    face,
                        FT_UInt    gindex,
                        FT_UInt32  load_flags )
  {
    FT_Error      error;
    FT_Size       size = face->size;
    AF_ScalerRec  scaler;


    if ( !size )
      return AF_Err_Invalid_Argument;

    FT_ZERO( &scaler );

    scaler.face    = face;
    scaler.x_scale = size->metrics.x_scale;
    scaler.x_delta = 0;  /* XXX: TODO: add support for sub-pixel hinting */
    scaler.y_scale = size->metrics.y_scale;
    scaler.y_delta = 0;  /* XXX: TODO: add support for sub-pixel hinting */

    scaler.render_mode = FT_LOAD_TARGET_MODE( load_flags );
    scaler.flags       = 0;  /* XXX: fix this */

    error = af_loader_reset( loader, face );
    if ( !error )
    {
      AF_ScriptMetrics  metrics;


      error = af_face_globals_get_metrics( loader->globals, gindex,
                                           &metrics );
      if ( !error )
      {
        loader->metrics = metrics;

        if ( metrics->clazz->script_metrics_scale )
          metrics->clazz->script_metrics_scale( metrics, &scaler );
        else
          metrics->scaler = scaler;

        load_flags |=  FT_LOAD_NO_SCALE | FT_LOAD_IGNORE_TRANSFORM;
        load_flags &= ~FT_LOAD_RENDER;

        error = metrics->clazz->script_hints_init( &loader->hints, metrics );
        if ( error )
          goto Exit;

        error = af_loader_load_g( loader, &scaler, gindex, load_flags, 0 );
      }
    }
  Exit:
    return error;
  }
Пример #2
0
  af_loader_load_glyph( AF_Module  module,
                        FT_Face    face,
                        FT_UInt    gindex,
                        FT_Int32   load_flags )
  {
    FT_Error      error;
    FT_Size       size   = face->size;
    AF_Loader     loader = module->loader;
    AF_ScalerRec  scaler;


    if ( !size )
      return AF_Err_Invalid_Argument;

    FT_ZERO( &scaler );

    scaler.face    = face;
    scaler.x_scale = size->metrics.x_scale;
    scaler.x_delta = 0;  /* XXX: TODO: add support for sub-pixel hinting */
    scaler.y_scale = size->metrics.y_scale;
    scaler.y_delta = 0;  /* XXX: TODO: add support for sub-pixel hinting */

    scaler.render_mode = FT_LOAD_TARGET_MODE( load_flags );
    scaler.flags       = 0;  /* XXX: fix this */

    error = af_loader_reset( module, face );
    if ( !error )
    {
      AF_ScriptMetrics  metrics;
      FT_UInt           options = 0;


#ifdef FT_OPTION_AUTOFIT2
      /* XXX: undocumented hook to activate the latin2 hinter */
      if ( load_flags & ( 1UL << 20 ) )
        options = 2;
#endif

      error = af_face_globals_get_metrics( loader->globals, gindex,
                                           options, &metrics );
      if ( !error )
      {
        loader->metrics = metrics;

        if ( metrics->clazz->script_metrics_scale )
          metrics->clazz->script_metrics_scale( metrics, &scaler );
        else
          metrics->scaler = scaler;

        load_flags |=  FT_LOAD_NO_SCALE | FT_LOAD_IGNORE_TRANSFORM;
        load_flags &= ~FT_LOAD_RENDER;

        if ( metrics->clazz->script_hints_init )
        {
          error = metrics->clazz->script_hints_init( &loader->hints,
                                                     metrics );
          if ( error )
            goto Exit;
        }

        error = af_loader_load_g( loader, &scaler, gindex, load_flags, 0 );
      }
    }
  Exit:
    return error;
  }
Пример #3
0
  static FT_Error
  af_loader_load_g( AF_Loader  loader,
                    AF_Scaler  scaler,
                    FT_UInt    glyph_index,
                    FT_Int32   load_flags,
                    FT_UInt    depth )
  {
    FT_Error          error;
    FT_Face           face     = loader->face;
    FT_GlyphLoader    gloader  = loader->gloader;
    AF_ScriptMetrics  metrics  = loader->metrics;
    AF_GlyphHints     hints    = &loader->hints;
    FT_GlyphSlot      slot     = face->glyph;
    FT_Slot_Internal  internal = slot->internal;
    FT_Int32          flags;


    flags = load_flags | FT_LOAD_LINEAR_DESIGN;
    error = FT_Load_Glyph( face, glyph_index, flags );
    if ( error )
      goto Exit;

    loader->transformed = internal->glyph_transformed;
    if ( loader->transformed )
    {
      FT_Matrix  inverse;


      loader->trans_matrix = internal->glyph_matrix;
      loader->trans_delta  = internal->glyph_delta;

      inverse = loader->trans_matrix;
      FT_Matrix_Invert( &inverse );
      FT_Vector_Transform( &loader->trans_delta, &inverse );
    }

    switch ( slot->format )
    {
    case FT_GLYPH_FORMAT_OUTLINE:
      /* translate the loaded glyph when an internal transform is needed */
      if ( loader->transformed )
        FT_Outline_Translate( &slot->outline,
                              loader->trans_delta.x,
                              loader->trans_delta.y );

      /* copy the outline points in the loader's current                */
      /* extra points which are used to keep original glyph coordinates */
      error = FT_GLYPHLOADER_CHECK_POINTS( gloader,
                                           slot->outline.n_points + 4,
                                           slot->outline.n_contours );
      if ( error )
        goto Exit;

      FT_ARRAY_COPY( gloader->current.outline.points,
                     slot->outline.points,
                     slot->outline.n_points );

      FT_ARRAY_COPY( gloader->current.outline.contours,
                     slot->outline.contours,
                     slot->outline.n_contours );

      FT_ARRAY_COPY( gloader->current.outline.tags,
                     slot->outline.tags,
                     slot->outline.n_points );

      gloader->current.outline.n_points   = slot->outline.n_points;
      gloader->current.outline.n_contours = slot->outline.n_contours;

      /* compute original horizontal phantom points (and ignore */
      /* vertical ones)                                         */
      loader->pp1.x = hints->x_delta;
      loader->pp1.y = hints->y_delta;
      loader->pp2.x = FT_MulFix( slot->metrics.horiAdvance,
                                 hints->x_scale ) + hints->x_delta;
      loader->pp2.y = hints->y_delta;

      /* be sure to check for spacing glyphs */
      if ( slot->outline.n_points == 0 )
        goto Hint_Metrics;

      /* now load the slot image into the auto-outline and run the */
      /* automatic hinting process                                 */
      if ( metrics->clazz->script_hints_apply )
        metrics->clazz->script_hints_apply( hints,
                                            &gloader->current.outline,
                                            metrics );

      /* we now need to adjust the metrics according to the change in */
      /* width/positioning that occurred during the hinting process   */
      if ( scaler->render_mode != FT_RENDER_MODE_LIGHT )
      {
        FT_Pos        old_rsb, old_lsb, new_lsb;
        FT_Pos        pp1x_uh, pp2x_uh;
        AF_AxisHints  axis  = &hints->axis[AF_DIMENSION_HORZ];
        AF_Edge       edge1 = axis->edges;         /* leftmost edge  */
        AF_Edge       edge2 = edge1 +
                              axis->num_edges - 1; /* rightmost edge */


        if ( axis->num_edges > 1 && AF_HINTS_DO_ADVANCE( hints ) )
        {
          old_rsb = loader->pp2.x - edge2->opos;
          old_lsb = edge1->opos;
          new_lsb = edge1->pos;

          /* remember unhinted values to later account */
          /* for rounding errors                       */

          pp1x_uh = new_lsb    - old_lsb;
          pp2x_uh = edge2->pos + old_rsb;

          /* prefer too much space over too little space */
          /* for very small sizes                        */

          if ( old_lsb < 24 )
            pp1x_uh -= 8;

          if ( old_rsb < 24 )
            pp2x_uh += 8;

          loader->pp1.x = FT_PIX_ROUND( pp1x_uh );
          loader->pp2.x = FT_PIX_ROUND( pp2x_uh );

          if ( loader->pp1.x >= new_lsb && old_lsb > 0 )
            loader->pp1.x -= 64;

          if ( loader->pp2.x <= edge2->pos && old_rsb > 0 )
            loader->pp2.x += 64;

          slot->lsb_delta = loader->pp1.x - pp1x_uh;
          slot->rsb_delta = loader->pp2.x - pp2x_uh;
        }
        else
        {
          FT_Pos  pp1x = loader->pp1.x;
          FT_Pos  pp2x = loader->pp2.x;


          loader->pp1.x = FT_PIX_ROUND( pp1x );
          loader->pp2.x = FT_PIX_ROUND( pp2x );

          slot->lsb_delta = loader->pp1.x - pp1x;
          slot->rsb_delta = loader->pp2.x - pp2x;
        }
      }
      else
      {
        FT_Pos  pp1x = loader->pp1.x;
        FT_Pos  pp2x = loader->pp2.x;


        loader->pp1.x = FT_PIX_ROUND( pp1x + hints->xmin_delta );
        loader->pp2.x = FT_PIX_ROUND( pp2x + hints->xmax_delta );

        slot->lsb_delta = loader->pp1.x - pp1x;
        slot->rsb_delta = loader->pp2.x - pp2x;
      }

      /* good, we simply add the glyph to our loader's base */
      FT_GlyphLoader_Add( gloader );
      break;

    case FT_GLYPH_FORMAT_COMPOSITE:
      {
        FT_UInt      nn, num_subglyphs = slot->num_subglyphs;
        FT_UInt      num_base_subgs, start_point;
        FT_SubGlyph  subglyph;


        start_point = gloader->base.outline.n_points;

        /* first of all, copy the subglyph descriptors in the glyph loader */
        error = FT_GlyphLoader_CheckSubGlyphs( gloader, num_subglyphs );
        if ( error )
          goto Exit;

        FT_ARRAY_COPY( gloader->current.subglyphs,
                       slot->subglyphs,
                       num_subglyphs );

        gloader->current.num_subglyphs = num_subglyphs;
        num_base_subgs                 = gloader->base.num_subglyphs;

        /* now read each subglyph independently */
        for ( nn = 0; nn < num_subglyphs; nn++ )
        {
          FT_Vector  pp1, pp2;
          FT_Pos     x, y;
          FT_UInt    num_points, num_new_points, num_base_points;


          /* gloader.current.subglyphs can change during glyph loading due */
          /* to re-allocation -- we must recompute the current subglyph on */
          /* each iteration                                                */
          subglyph = gloader->base.subglyphs + num_base_subgs + nn;

          pp1 = loader->pp1;
          pp2 = loader->pp2;

          num_base_points = gloader->base.outline.n_points;

          error = af_loader_load_g( loader, scaler, subglyph->index,
                                    load_flags, depth + 1 );
          if ( error )
            goto Exit;

          /* recompute subglyph pointer */
          subglyph = gloader->base.subglyphs + num_base_subgs + nn;

          if ( subglyph->flags & FT_SUBGLYPH_FLAG_USE_MY_METRICS )
          {
            pp1 = loader->pp1;
            pp2 = loader->pp2;
          }
          else
          {
            loader->pp1 = pp1;
            loader->pp2 = pp2;
          }

          num_points     = gloader->base.outline.n_points;
          num_new_points = num_points - num_base_points;

          /* now perform the transformation required for this subglyph */

          if ( subglyph->flags & ( FT_SUBGLYPH_FLAG_SCALE    |
                                   FT_SUBGLYPH_FLAG_XY_SCALE |
                                   FT_SUBGLYPH_FLAG_2X2      ) )
          {
            FT_Vector*  cur   = gloader->base.outline.points +
                                num_base_points;
            FT_Vector*  limit = cur + num_new_points;


            for ( ; cur < limit; cur++ )
              FT_Vector_Transform( cur, &subglyph->transform );
          }

          /* apply offset */

          if ( !( subglyph->flags & FT_SUBGLYPH_FLAG_ARGS_ARE_XY_VALUES ) )
          {
            FT_Int      k = subglyph->arg1;
            FT_UInt     l = subglyph->arg2;
            FT_Vector*  p1;
            FT_Vector*  p2;


            if ( start_point + k >= num_base_points         ||
                               l >= (FT_UInt)num_new_points )
            {
              error = AF_Err_Invalid_Composite;
              goto Exit;
            }

            l += num_base_points;

            /* for now, only use the current point coordinates; */
            /* we eventually may consider another approach      */
            p1 = gloader->base.outline.points + start_point + k;
            p2 = gloader->base.outline.points + start_point + l;

            x = p1->x - p2->x;
            y = p1->y - p2->y;
          }
          else
          {
            x = FT_MulFix( subglyph->arg1, hints->x_scale ) + hints->x_delta;
            y = FT_MulFix( subglyph->arg2, hints->y_scale ) + hints->y_delta;

            x = FT_PIX_ROUND( x );
            y = FT_PIX_ROUND( y );
          }

          {
            FT_Outline  dummy = gloader->base.outline;


            dummy.points  += num_base_points;
            dummy.n_points = (short)num_new_points;

            FT_Outline_Translate( &dummy, x, y );
          }
        }
      }
      break;

    default:
      /* we don't support other formats (yet?) */
      error = AF_Err_Unimplemented_Feature;
    }

  Hint_Metrics:
    if ( depth == 0 )
    {
      FT_BBox    bbox;
      FT_Vector  vvector;


      vvector.x = slot->metrics.vertBearingX - slot->metrics.horiBearingX;
      vvector.y = slot->metrics.vertBearingY - slot->metrics.horiBearingY;
      vvector.x = FT_MulFix( vvector.x, metrics->scaler.x_scale );
      vvector.y = FT_MulFix( vvector.y, metrics->scaler.y_scale );

      /* transform the hinted outline if needed */
      if ( loader->transformed )
      {
        FT_Outline_Transform( &gloader->base.outline, &loader->trans_matrix );
        FT_Vector_Transform( &vvector, &loader->trans_matrix );
      }
#if 1
      /* we must translate our final outline by -pp1.x and compute */
      /* the new metrics                                           */
      if ( loader->pp1.x )
        FT_Outline_Translate( &gloader->base.outline, -loader->pp1.x, 0 );
#endif
      FT_Outline_Get_CBox( &gloader->base.outline, &bbox );

      bbox.xMin = FT_PIX_FLOOR( bbox.xMin );
      bbox.yMin = FT_PIX_FLOOR( bbox.yMin );
      bbox.xMax = FT_PIX_CEIL(  bbox.xMax );
      bbox.yMax = FT_PIX_CEIL(  bbox.yMax );

      slot->metrics.width        = bbox.xMax - bbox.xMin;
      slot->metrics.height       = bbox.yMax - bbox.yMin;
      slot->metrics.horiBearingX = bbox.xMin;
      slot->metrics.horiBearingY = bbox.yMax;

      slot->metrics.vertBearingX = FT_PIX_FLOOR( bbox.xMin + vvector.x );
      slot->metrics.vertBearingY = FT_PIX_FLOOR( bbox.yMax + vvector.y );

      /* for mono-width fonts (like Andale, Courier, etc.) we need */
      /* to keep the original rounded advance width; ditto for     */
      /* digits if all have the same advance width                 */
#if 0
      if ( !FT_IS_FIXED_WIDTH( slot->face ) )
        slot->metrics.horiAdvance = loader->pp2.x - loader->pp1.x;
      else
        slot->metrics.horiAdvance = FT_MulFix( slot->metrics.horiAdvance,
                                               x_scale );
#else
      if ( scaler->render_mode != FT_RENDER_MODE_LIGHT                      &&
           ( FT_IS_FIXED_WIDTH( slot->face )                              ||
             ( af_face_globals_is_digit( loader->globals, glyph_index ) &&
               metrics->digits_have_same_width                          ) ) )
      {
        slot->metrics.horiAdvance = FT_MulFix( slot->metrics.horiAdvance,
                                               metrics->scaler.x_scale );

        /* Set delta values to 0.  Otherwise code that uses them is */
        /* going to ruin the fixed advance width.                   */
        slot->lsb_delta = 0;
        slot->rsb_delta = 0;
      }
      else
      {
        /* non-spacing glyphs must stay as-is */
        if ( slot->metrics.horiAdvance )
          slot->metrics.horiAdvance = loader->pp2.x - loader->pp1.x;
      }
#endif

      slot->metrics.vertAdvance = FT_MulFix( slot->metrics.vertAdvance,
                                             metrics->scaler.y_scale );

      slot->metrics.horiAdvance = FT_PIX_ROUND( slot->metrics.horiAdvance );
      slot->metrics.vertAdvance = FT_PIX_ROUND( slot->metrics.vertAdvance );

      /* now copy outline into glyph slot */
      FT_GlyphLoader_Rewind( internal->loader );
      error = FT_GlyphLoader_CopyPoints( internal->loader, gloader );
      if ( error )
        goto Exit;

      /* reassign all outline fields except flags to protect them */
      slot->outline.n_contours = internal->loader->base.outline.n_contours;
      slot->outline.n_points   = internal->loader->base.outline.n_points;
      slot->outline.points     = internal->loader->base.outline.points;
      slot->outline.tags       = internal->loader->base.outline.tags;
      slot->outline.contours   = internal->loader->base.outline.contours;

      slot->format  = FT_GLYPH_FORMAT_OUTLINE;
    }

  Exit:
    return error;
  }
Пример #4
0
  af_loader_load_glyph( AF_Loader  loader,
                        AF_Module  module,
                        FT_Face    face,
                        FT_UInt    gindex,
                        FT_Int32   load_flags )
  {
    FT_Error      error;
    FT_Size       size   = face->size;
    AF_ScalerRec  scaler;


    if ( !size )
      return FT_THROW( Invalid_Size_Handle );

    FT_ZERO( &scaler );

    scaler.face    = face;
    scaler.x_scale = size->metrics.x_scale;
    scaler.x_delta = 0;  /* XXX: TODO: add support for sub-pixel hinting */
    scaler.y_scale = size->metrics.y_scale;
    scaler.y_delta = 0;  /* XXX: TODO: add support for sub-pixel hinting */

    scaler.render_mode = FT_LOAD_TARGET_MODE( load_flags );
    scaler.flags       = 0;  /* XXX: fix this */

    error = af_loader_reset( loader, module, face );
    if ( !error )
    {
      AF_StyleMetrics  metrics;
      FT_UInt          options = AF_STYLE_NONE_DFLT;


#ifdef FT_OPTION_AUTOFIT2
      /* XXX: undocumented hook to activate the latin2 writing system */
      if ( load_flags & ( 1UL << 20 ) )
        options = AF_STYLE_LTN2_DFLT;
#endif

      error = af_face_globals_get_metrics( loader->globals, gindex,
                                           options, &metrics );
      if ( !error )
      {
#ifdef FT_CONFIG_OPTION_PIC
        AF_FaceGlobals         globals = loader->globals;
#endif
        AF_StyleClass          style_class = metrics->style_class;
        AF_WritingSystemClass  writing_system_class =
          AF_WRITING_SYSTEM_CLASSES_GET[style_class->writing_system];


        loader->metrics = metrics;

        if ( writing_system_class->style_metrics_scale )
          writing_system_class->style_metrics_scale( metrics, &scaler );
        else
          metrics->scaler = scaler;

        load_flags |=  FT_LOAD_NO_SCALE | FT_LOAD_IGNORE_TRANSFORM;
        load_flags &= ~FT_LOAD_RENDER;

        if ( writing_system_class->style_hints_init )
        {
          error = writing_system_class->style_hints_init( loader->hints,
                                                          metrics );
          if ( error )
            goto Exit;
        }

        error = af_loader_load_g( loader, &scaler, gindex, load_flags );
      }
    }
  Exit:
    return error;
  }
Пример #5
0
  static FT_Error
  af_loader_load_g( AF_Loader  loader,
                    AF_Scaler  scaler,
                    FT_UInt    glyph_index,
                    FT_Int32   load_flags,
                    FT_UInt    depth )
  {
    FT_Error          error    = 0;
    FT_Face           face     = loader->face;
    FT_GlyphLoader    gloader  = loader->gloader;
    AF_ScriptMetrics  metrics  = loader->metrics;
    AF_GlyphHints     hints    = &loader->hints;
    FT_GlyphSlot      slot     = face->glyph;
    FT_Slot_Internal  internal = slot->internal;

    error = FT_Load_Glyph( face, glyph_index, load_flags );
    if ( error )
      goto Exit;

    loader->transformed = internal->glyph_transformed;
    if ( loader->transformed )
    {
      FT_Matrix  inverse;

      loader->trans_matrix = internal->glyph_matrix;
      loader->trans_delta  = internal->glyph_delta;

      inverse = loader->trans_matrix;
      FT_Matrix_Invert( &inverse );
      FT_Vector_Transform( &loader->trans_delta, &inverse );
    }

    /* set linear metrics */
    slot->linearHoriAdvance = slot->metrics.horiAdvance;
    slot->linearVertAdvance = slot->metrics.vertAdvance;

    switch ( slot->format )
    {
      case FT_GLYPH_FORMAT_OUTLINE:
       /* translate the loaded glyph when an internal transform
        * is needed
        */
        if ( loader->transformed )
          FT_Outline_Translate( &slot->outline,
                                loader->trans_delta.x,
                                loader->trans_delta.y );

        /* copy the outline points in the loader's current               */
        /* extra points which is used to keep original glyph coordinates */
        error = FT_GlyphLoader_CheckPoints( gloader,
                                            slot->outline.n_points + 4,
                                            slot->outline.n_contours );
        if ( error )
          goto Exit;

        FT_ARRAY_COPY( gloader->current.outline.points,
                       slot->outline.points,
                       slot->outline.n_points );

        FT_ARRAY_COPY( gloader->current.extra_points,
                       slot->outline.points,
                       slot->outline.n_points );

        FT_ARRAY_COPY( gloader->current.outline.contours,
                       slot->outline.contours,
                       slot->outline.n_contours );

        FT_ARRAY_COPY( gloader->current.outline.tags,
                       slot->outline.tags,
                       slot->outline.n_points );

        gloader->current.outline.n_points   = slot->outline.n_points;
        gloader->current.outline.n_contours = slot->outline.n_contours;

        /* compute original horizontal phantom points (and ignore */
        /* vertical ones)                                         */
        loader->pp1.x = hints->x_delta;
        loader->pp1.y = hints->y_delta;
        loader->pp2.x = FT_MulFix( slot->metrics.horiAdvance,
                                   hints->x_scale ) + hints->x_delta;
        loader->pp2.y = hints->y_delta;

        /* be sure to check for spacing glyphs */
        if ( slot->outline.n_points == 0 )
          goto Hint_Metrics;

        /* now load the slot image into the auto-outline and run the */
        /* automatic hinting process                                 */
        metrics->clazz->script_hints_apply( hints,
                                            &gloader->current.outline,
                                            metrics );

        /* we now need to hint the metrics according to the change in */
        /* width/positioning that occured during the hinting process  */
        {
          FT_Pos        old_advance, old_rsb, old_lsb, new_lsb;
          FT_Pos        pp1x_uh, pp2x_uh;
          AF_AxisHints  axis  = &hints->axis[ AF_DIMENSION_HORZ ];
          AF_Edge       edge1 = axis->edges;         /* leftmost edge  */
          AF_Edge       edge2 = edge1 +
                                axis->num_edges - 1; /* rightmost edge */


          if ( edge2 > edge1 )
          {
            old_advance = loader->pp2.x;
            old_rsb     = old_advance - edge2->opos;
            old_lsb     = edge1->opos;
            new_lsb     = edge1->pos;

            /* remember unhinted values to later account */
            /* for rounding errors                       */

            pp1x_uh = new_lsb    - old_lsb;
            pp2x_uh = edge2->pos + old_rsb;

            /* prefer too much space over too little space */
            /* for very small sizes                        */

            if ( old_lsb < 24 )
              pp1x_uh -= 5;

            if ( old_rsb < 24 )
              pp2x_uh += 5;

            loader->pp1.x = FT_PIX_ROUND( pp1x_uh );
            loader->pp2.x = FT_PIX_ROUND( pp2x_uh );

            slot->lsb_delta = loader->pp1.x - pp1x_uh;
            slot->rsb_delta = loader->pp2.x - pp2x_uh;

#if 0
            /* try to fix certain bad advance computations */
            if ( loader->pp2.x + loader->pp1.x == edge2->pos && old_rsb > 4 )
              loader->pp2.x += 64;
#endif
          }
          else
          {
            loader->pp1.x = FT_PIX_ROUND( loader->pp1.x );
            loader->pp2.x = FT_PIX_ROUND( loader->pp2.x );
          }
        }

        /* good, we simply add the glyph to our loader's base */
        FT_GlyphLoader_Add( gloader );
        break;

    case FT_GLYPH_FORMAT_COMPOSITE:
      {
        FT_UInt      nn, num_subglyphs = slot->num_subglyphs;
        FT_UInt      num_base_subgs, start_point;
        FT_SubGlyph  subglyph;


        start_point = gloader->base.outline.n_points;

        /* first of all, copy the subglyph descriptors in the glyph loader */
        error = FT_GlyphLoader_CheckSubGlyphs( gloader, num_subglyphs );
        if ( error )
          goto Exit;

        FT_ARRAY_COPY( gloader->current.subglyphs,
                       slot->subglyphs,
                       num_subglyphs );

        gloader->current.num_subglyphs = num_subglyphs;
        num_base_subgs = gloader->base.num_subglyphs;

        /* now, read each subglyph independently */
        for ( nn = 0; nn < num_subglyphs; nn++ )
        {
          FT_Vector  pp1, pp2;
          FT_Pos     x, y;
          FT_UInt    num_points, num_new_points, num_base_points;


          /* gloader.current.subglyphs can change during glyph loading due */
          /* to re-allocation -- we must recompute the current subglyph on */
          /* each iteration                                                */
          subglyph = gloader->base.subglyphs + num_base_subgs + nn;

          pp1 = loader->pp1;
          pp2 = loader->pp2;

          num_base_points = gloader->base.outline.n_points;

          error = af_loader_load_g( loader, scaler, subglyph->index,
                                    load_flags, depth + 1 );
          if ( error )
            goto Exit;

          /* recompute subglyph pointer */
          subglyph = gloader->base.subglyphs + num_base_subgs + nn;

          if ( subglyph->flags & FT_SUBGLYPH_FLAG_USE_MY_METRICS )
          {
            pp1 = loader->pp1;
            pp2 = loader->pp2;
          }
          else
          {
            loader->pp1 = pp1;
            loader->pp2 = pp2;
          }

          num_points     = gloader->base.outline.n_points;
          num_new_points = num_points - num_base_points;

          /* now perform the transform required for this subglyph */

          if ( subglyph->flags & ( FT_SUBGLYPH_FLAG_SCALE    |
                                   FT_SUBGLYPH_FLAG_XY_SCALE |
                                   FT_SUBGLYPH_FLAG_2X2      ) )
          {
            FT_Vector*  cur   = gloader->base.outline.points +
                                num_base_points;
            FT_Vector*  org   = gloader->base.extra_points +
                                num_base_points;
            FT_Vector*  limit = cur + num_new_points;


            for ( ; cur < limit; cur++, org++ )
            {
              FT_Vector_Transform( cur, &subglyph->transform );
              FT_Vector_Transform( org, &subglyph->transform );
            }
          }

          /* apply offset */

          if ( !( subglyph->flags & FT_SUBGLYPH_FLAG_ARGS_ARE_XY_VALUES ) )
          {
            FT_Int      k = subglyph->arg1;
            FT_UInt     l = subglyph->arg2;
            FT_Vector*  p1;
            FT_Vector*  p2;


            if ( start_point + k >= num_base_points         ||
                               l >= (FT_UInt)num_new_points )
            {
              error = FT_Err_Invalid_Composite;
              goto Exit;
            }

            l += num_base_points;

            /* for now, only use the current point coordinates;    */
            /* we may consider another approach in the near future */
            p1 = gloader->base.outline.points + start_point + k;
            p2 = gloader->base.outline.points + start_point + l;

            x = p1->x - p2->x;
            y = p1->y - p2->y;
          }
          else
          {
            x = FT_MulFix( subglyph->arg1, hints->x_scale ) + hints->x_delta;
            y = FT_MulFix( subglyph->arg2, hints->y_scale ) + hints->y_delta;

            x = FT_PIX_ROUND(x);
            y = FT_PIX_ROUND(y);
          }

          {
            FT_Outline  dummy = gloader->base.outline;


            dummy.points  += num_base_points;
            dummy.n_points = (short)num_new_points;

            FT_Outline_Translate( &dummy, x, y );
          }
        }
      }
      break;

    default:
      /* we don't support other formats (yet?) */
      error = FT_Err_Unimplemented_Feature;
    }

  Hint_Metrics:
    if ( depth == 0 )
    {
      FT_BBox  bbox;


      /* transform the hinted outline if needed */
      if ( loader->transformed )
        FT_Outline_Transform( &gloader->base.outline, &loader->trans_matrix );

      /* we must translate our final outline by -pp1.x and compute */
      /* the new metrics                                           */
      if ( loader->pp1.x )
        FT_Outline_Translate( &gloader->base.outline, -loader->pp1.x, 0 );

      FT_Outline_Get_CBox( &gloader->base.outline, &bbox );

      bbox.xMin  = FT_PIX_FLOOR(  bbox.xMin );
      bbox.yMin  = FT_PIX_FLOOR(  bbox.yMin );
      bbox.xMax  = FT_PIX_CEIL( bbox.xMax );
      bbox.yMax  = FT_PIX_CEIL( bbox.yMax );

      slot->metrics.width        = bbox.xMax - bbox.xMin;
      slot->metrics.height       = bbox.yMax - bbox.yMin;
      slot->metrics.horiBearingX = bbox.xMin;
      slot->metrics.horiBearingY = bbox.yMax;

      /* for mono-width fonts (like Andale, Courier, etc.) we need */
      /* to keep the original rounded advance width                */
#if 0
      if ( !FT_IS_FIXED_WIDTH( slot->face ) )
        slot->metrics.horiAdvance = loader->pp2.x - loader->pp1.x;
      else
        slot->metrics.horiAdvance = FT_MulFix( slot->metrics.horiAdvance,
                                               x_scale );
#else
      /* for mono-width fonts (like Andale, Courier, etc.) we need */
      /* to keep the original rounded advance width                */
      if ( !FT_IS_FIXED_WIDTH( slot->face ) )
        slot->metrics.horiAdvance = loader->pp2.x - loader->pp1.x;
      else
        slot->metrics.horiAdvance = FT_MulFix( slot->metrics.horiAdvance,
                                               metrics->scaler.x_scale );
#endif

      slot->metrics.horiAdvance = FT_PIX_ROUND( slot->metrics.horiAdvance );

      /* now copy outline into glyph slot */
      FT_GlyphLoader_Rewind( internal->loader );
      error = FT_GlyphLoader_CopyPoints( internal->loader, gloader );
      if ( error )
        goto Exit;

      slot->outline = internal->loader->base.outline;
      slot->format  = FT_GLYPH_FORMAT_OUTLINE;
    }

#ifdef DEBUG_HINTER
    af_debug_hinter = hinter;
#endif

  Exit:
    return error;
  }