ftoutln.c

qt-embedded-2.3.8.tar.gz源码

  FT_EXPORT_DEF( FT_Error )  FT_Outline_Copy( FT_Outline*  source,
                                              FT_Outline  *target )
  {
    FT_Int  is_owner;


    if ( !source            || !target            ||
         source->n_points   != target->n_points   ||
         source->n_contours != target->n_contours )
      return FT_Err_Invalid_Argument;

    MEM_Copy( target->points, source->points,
              source->n_points * sizeof ( FT_Vector ) );

    MEM_Copy( target->tags, source->tags,
              source->n_points * sizeof ( FT_Byte ) );

    MEM_Copy( target->contours, source->contours,
              source->n_contours * sizeof ( FT_Short ) );

    /* copy all flags, except the `ft_outline_owner' one */
    is_owner      = target->flags & ft_outline_owner;
    target->flags = source->flags;

    target->flags &= ~ft_outline_owner;
    target->flags |= is_owner;

    return FT_Err_Ok;
  }


  FT_EXPORT_DEF( FT_Error )  FT_Outline_Done_Internal( FT_Memory    memory,
                                                       FT_Outline*  outline )
  {
    if ( outline )
    {
      if ( outline->flags & ft_outline_owner )
      {
        FREE( outline->points   );
        FREE( outline->tags     );
        FREE( outline->contours );
      }
      *outline = null_outline;

      return FT_Err_Ok;
    }
    else
      return FT_Err_Invalid_Argument;
  }


  /* documentation is in ftoutln.h */

  FT_EXPORT_DEF( FT_Error )  FT_Outline_Done( FT_Library   library,
                                              FT_Outline*  outline )
  {
    /* check for valid `outline' in FT_Outline_Done_Internal() */

    if ( !library )
      return FT_Err_Invalid_Library_Handle;

    return FT_Outline_Done_Internal( library->memory, outline );
  }


  /* documentation is in ftoutln.h */

  FT_EXPORT_DEF( void )  FT_Outline_Get_CBox( FT_Outline*  outline,
                                              FT_BBox     *acbox )
  {
    FT_Pos  xMin, yMin, xMax, yMax;


    if ( outline && acbox )
    {
      if ( outline->n_points == 0 )
      {
        xMin = 0;
        yMin = 0;
        xMax = 0;
        yMax = 0;
      }
      else
      {
        FT_Vector*  vec   = outline->points;
        FT_Vector*  limit = vec + outline->n_points;


        xMin = xMax = vec->x;
        yMin = yMax = vec->y;
        vec++;

        for ( ; vec < limit; vec++ )
        {
          FT_Pos  x, y;


          x = vec->x;
          if ( x < xMin ) xMin = x;
          if ( x > xMax ) xMax = x;

          y = vec->y;
          if ( y < yMin ) yMin = y;
          if ( y > yMax ) yMax = y;
        }
      }
      acbox->xMin = xMin;
      acbox->xMax = xMax;
      acbox->yMin = yMin;
      acbox->yMax = yMax;
    }
  }


  /* documentation is in ftoutln.h */

  FT_EXPORT_DEF( void )  FT_Outline_Translate( FT_Outline*  outline,
                                               FT_Pos       xOffset,
                                               FT_Pos       yOffset )
  {
    FT_UShort   n;
    FT_Vector*  vec = outline->points;


    for ( n = 0; n < outline->n_points; n++ )
    {
      vec->x += xOffset;
      vec->y += yOffset;
      vec++;
    }
  }


  /* documentation is in ftoutln.h */

  FT_EXPORT_DEF( void )  FT_Outline_Reverse( FT_Outline*  outline )
  {
    FT_UShort  n;
    FT_Int     first, last;


    first = 0;

    for ( n = 0; n < outline->n_contours; n++ )
    {
      last  = outline->contours[n];

      /* reverse point table */
      {
        FT_Vector*  p = outline->points + first;
        FT_Vector*  q = outline->points + last;
        FT_Vector   swap;


        while ( p < q )
        {
          swap = *p;
          *p   = *q;
          *q   = swap;
          p++;
          q--;
        }
      }

      /* reverse tags table */
      {
        char*  p = outline->tags + first;
        char*  q = outline->tags + last;
        char   swap;


        while ( p < q )
        {
          swap = *p;
          *p   = *q;
          *q   = swap;
          p++;
          q--;
        }
      }

      first = last + 1;
    }

    outline->flags ^= ft_outline_reverse_fill;
  }


  /* documentation is in ftoutln.h */

  FT_EXPORT_DEF( FT_Error )  FT_Outline_Render( FT_Library         library,
                                                FT_Outline*        outline,
                                                FT_Raster_Params*  params )
  {
    FT_Error     error;
    FT_Bool      update = 0;
    FT_Renderer  renderer;
    FT_ListNode  node;


    if ( !library )
      return FT_Err_Invalid_Library_Handle;

    if ( !params )
      return FT_Err_Invalid_Argument;

    renderer = library->cur_renderer;
    node     = library->renderers.head;

    params->source = (void*)outline;

    error = FT_Err_Cannot_Render_Glyph;
    while ( renderer )
    {
      error = renderer->raster_render( renderer->raster, params );
      if ( !error || error != FT_Err_Cannot_Render_Glyph )
        break;

      /* FT_Err_Cannot_Render_Glyph is returned if the render mode   */
      /* is unsupported by the current renderer for this glyph image */
      /* format                                                      */

      /* now, look for another renderer that supports the same */
      /* format                                                */
      renderer = FT_Lookup_Renderer( library, ft_glyph_format_outline,
                                     &node );
      update   = 1;
    }

    /* if we changed the current renderer for the glyph image format */
    /* we need to select it as the next current one                  */
    if ( !error && update && renderer )
      FT_Set_Renderer( library, renderer, 0, 0 );

    return error;
  }


  /* documentation is in ftoutln.h */

  FT_EXPORT_DEF( FT_Error )  FT_Outline_Get_Bitmap( FT_Library   library,
                                                    FT_Outline*  outline,
                                                    FT_Bitmap   *abitmap )
  {
    FT_Raster_Params  params;


    if ( !abitmap )
      return FT_Err_Invalid_Argument;

    /* other checks are delayed to FT_Outline_Render() */

    params.target = abitmap;
    params.flags  = 0;

    if ( abitmap->pixel_mode == ft_pixel_mode_grays )
      params.flags |= ft_raster_flag_aa;

    return FT_Outline_Render( library, outline, &params );
  }


  /* documentation is in ftoutln.h */

  FT_EXPORT_DEF( void )  FT_Vector_Transform( FT_Vector*  vector,
                                              FT_Matrix*  matrix )
  {
    FT_Pos xz, yz;


    if ( !vector || !matrix )
      return;

    xz = FT_MulFix( vector->x, matrix->xx ) +
         FT_MulFix( vector->y, matrix->xy );

    yz = FT_MulFix( vector->x, matrix->yx ) +
         FT_MulFix( vector->y, matrix->yy );

    vector->x = xz;
    vector->y = yz;
  }


  /* documentation is in ftoutln.h */

  FT_EXPORT_DEF( void )  FT_Outline_Transform( FT_Outline*  outline,
                                               FT_Matrix*   matrix )
  {
    FT_Vector*  vec = outline->points;
    FT_Vector*  limit = vec + outline->n_points;


    for ( ; vec < limit; vec++ )
      FT_Vector_Transform( vec, matrix );
  }


/* END */