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
}
Size
Image::MeasureOverrideWithError (Size availableSize, MoonError *error)
{
Size desired = availableSize;
Rect shape_bounds = Rect ();
ImageSource *source = GetSource ();
double sx = 0.0;
double sy = 0.0;
if (source)
shape_bounds = Rect (0,0,source->GetPixelWidth (),source->GetPixelHeight ());
/* don't stretch to infinite size */
if (isinf (desired.width))
desired.width = shape_bounds.width;
if (isinf (desired.height))
desired.height = shape_bounds.height;
/* compute the scaling */
if (shape_bounds.width > 0)
sx = desired.width / shape_bounds.width;
if (shape_bounds.height > 0)
sy = desired.height / shape_bounds.height;
/* don't use infinite dimensions as constraints */
if (isinf (availableSize.width))
sx = sy;
if (isinf (availableSize.height))
sy = sx;
switch (GetStretch ()) {
case StretchUniform:
sx = sy = MIN (sx, sy);
break;
case StretchUniformToFill:
sx = sy = MAX (sx, sy);
break;
case StretchFill:
if (isinf (availableSize.width))
sx = sy;
if (isinf (availableSize.height))
sy = sx;
break;
case StretchNone:
sx = sy = 1.0;
break;
}
desired = Size (shape_bounds.width * sx, shape_bounds.height * sy);
return desired;
}
void
Image::OnPropertyChanged (PropertyChangedEventArgs *args, MoonError *error)
{
if (args->GetProperty ()->GetOwnerType() != Type::IMAGE) {
MediaBase::OnPropertyChanged (args, error);
return;
}
if (args->GetId () == Image::SourceProperty) {
ImageSource *source = args->GetNewValue () ? args->GetNewValue ()->AsImageSource () : NULL;
ImageSource *old = args->GetOldValue () ? args->GetOldValue ()->AsImageSource () : NULL;
if (old) {
if (old->Is(Type::BITMAPSOURCE)) {
old->RemoveHandler (BitmapSource::PixelDataChangedEvent, source_pixel_data_changed, this);
}
if (old->Is(Type::BITMAPIMAGE)) {
old->RemoveHandler (BitmapImage::DownloadProgressEvent, download_progress, this);
old->RemoveHandler (BitmapImage::ImageOpenedEvent, image_opened, this);
old->RemoveHandler (BitmapImage::ImageFailedEvent, image_failed, this);
}
}
if (source) {
if (source->Is(Type::BITMAPSOURCE)) {
source->AddHandler (BitmapSource::PixelDataChangedEvent, source_pixel_data_changed, this);
}
if (source->Is(Type::BITMAPIMAGE)) {
source->AddHandler (BitmapImage::DownloadProgressEvent, download_progress, this);
source->AddHandler (BitmapImage::ImageOpenedEvent, image_opened, this);
source->AddHandler (BitmapImage::ImageFailedEvent, image_failed, this);
}
if (source->GetPixelWidth () > 0 && source->GetPixelHeight () > 0) {
RoutedEventArgs *args = MoonUnmanagedFactory::CreateRoutedEventArgs ();
ImageOpened (args);
args->unref ();
}
} else {
UpdateBounds ();
Invalidate ();
}
InvalidateMeasure ();
}
// we need to notify attachees if our DownloadProgress changed.
NotifyListenersOfPropertyChange (args, error);
}
Size
Image::ArrangeOverrideWithError (Size finalSize, MoonError *error)
{
Size arranged = finalSize;
Rect shape_bounds = Rect ();
ImageSource *source = GetSource ();
double sx = 1.0;
double sy = 1.0;
if (source)
shape_bounds = Rect (0, 0, source->GetPixelWidth (), source->GetPixelHeight ());
/* compute the scaling */
if (shape_bounds.width == 0)
shape_bounds.width = arranged.width;
if (shape_bounds.height == 0)
shape_bounds.height = arranged.height;
if (shape_bounds.width != arranged.width)
sx = arranged.width / shape_bounds.width;
if (shape_bounds.height != arranged.height)
sy = arranged.height / shape_bounds.height;
switch (GetStretch ()) {
case StretchUniform:
sx = sy = MIN (sx, sy);
break;
case StretchUniformToFill:
sx = sy = MAX (sx, sy);
break;
case StretchNone:
sx = sy = 1.0;
default:
break;
}
arranged = Size (shape_bounds.width * sx, shape_bounds.height * sy);
return arranged;
}
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 ();
}