Rect
Image::GetCoverageBounds ()
{
// FIXME: SL3 final only supports PixelFormatPbgra32 which makes this optimization
// obsolete - unless we keep an "has_alpha" flag with each image ?!?
return Rect ();
#if FALSE
ImageSource *source = GetSource ();
if (!source || source->GetPixelFormat () == PixelFormatPbgra32)
return Rect ();
Stretch stretch = GetStretch ();
if (stretch == StretchFill || stretch == StretchUniformToFill)
return bounds;
cairo_matrix_t matrix;
Rect image = Rect (0, 0, source->GetPixelWidth (), source->GetPixelHeight ());
Rect paint = Rect (0, 0, GetActualWidth (), GetActualHeight ());
image_brush_compute_pattern_matrix (&matrix,
paint.width, paint.height,
image.width, image.height, stretch,
AlignmentXCenter, AlignmentYCenter, NULL, NULL);
cairo_matrix_invert (&matrix);
cairo_matrix_multiply (&matrix, &matrix, &absolute_xform);
image = image.Transform (&matrix);
image = image.Intersection (bounds);
return image;
#endif
}
