Size
Border::MeasureOverrideWithError (Size availableSize, MoonError *error)
{
Size desired = Size (0,0);
Thickness border = *GetPadding () + *GetBorderThickness ();
// Get the desired size of our child, and include any margins we set
VisualTreeWalker walker = VisualTreeWalker (this);
while (UIElement *child = walker.Step ()) {
child->MeasureWithError (availableSize.GrowBy (-border), error);
desired = child->GetDesiredSize ();
}
desired = desired.GrowBy (border);
desired = desired.Min (availableSize);
return desired;
}
void
Image::Render (cairo_t *cr, Region *region, bool path_only)
{
ImageSource *source = GetSource ();
cairo_pattern_t *pattern = NULL;
cairo_matrix_t matrix;
if (!source)
return;
source->Lock ();
cairo_save (cr);
Size specified (GetActualWidth (), GetActualHeight ());
Size stretched = ApplySizeConstraints (specified);
bool adjust = specified != GetRenderSize ();
if (GetStretch () != StretchUniformToFill)
specified = specified.Min (stretched);
Rect paint = Rect (0, 0, specified.width, specified.height);
if (!path_only) {
Rect image = Rect (0, 0, source->GetPixelWidth (), source->GetPixelHeight ());
if (GetStretch () == StretchNone)
paint = paint.Union (image);
if (image.width == 0.0 && image.height == 0.0)
goto cleanup;
pattern = cairo_pattern_create_for_surface (source->GetSurface (cr));
image_brush_compute_pattern_matrix (&matrix, paint.width, paint.height,
image.width, image.height,
GetStretch (),
AlignmentXCenter, AlignmentYCenter, NULL, NULL);
cairo_pattern_set_matrix (pattern, &matrix);
#if MAKE_EVERYTHING_SLOW_AND_BUGGY
cairo_pattern_set_extend (pattern, CAIRO_EXTEND_PAD);
#endif
if (cairo_pattern_status (pattern) == CAIRO_STATUS_SUCCESS) {
cairo_set_source (cr, pattern);
}
cairo_pattern_destroy (pattern);
}
if (adjust) {
// FIXME: Propagate error properly
MoonError error;
specified = MeasureOverrideWithError (specified, &error);
paint = Rect ((stretched.width - specified.width) * 0.5, (stretched.height - specified.height) * 0.5, specified.width, specified.height);
}
if (!path_only)
RenderLayoutClip (cr);
paint = paint.Intersection (Rect (0, 0, stretched.width, stretched.height));
paint.Draw (cr);
if (!path_only)
cairo_fill (cr);
cleanup:
cairo_restore (cr);
source->Unlock ();
}