summaryrefslogtreecommitdiffstats
path: root/image/ClippedImage.h
diff options
context:
space:
mode:
Diffstat (limited to 'image/ClippedImage.h')
-rw-r--r--image/ClippedImage.h101
1 files changed, 101 insertions, 0 deletions
diff --git a/image/ClippedImage.h b/image/ClippedImage.h
new file mode 100644
index 000000000..140cc1909
--- /dev/null
+++ b/image/ClippedImage.h
@@ -0,0 +1,101 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_image_ClippedImage_h
+#define mozilla_image_ClippedImage_h
+
+#include "ImageWrapper.h"
+#include "mozilla/gfx/2D.h"
+#include "mozilla/Maybe.h"
+#include "mozilla/RefPtr.h"
+#include "mozilla/UniquePtr.h"
+
+namespace mozilla {
+namespace image {
+
+class ClippedImageCachedSurface;
+class DrawSingleTileCallback;
+
+/**
+ * An Image wrapper that clips an image against a rectangle. Right now only
+ * absolute coordinates in pixels are supported.
+ *
+ * XXX(seth): There a known (performance, not correctness) issue with
+ * GetImageContainer. See the comments for that method for more information.
+ */
+class ClippedImage : public ImageWrapper
+{
+ typedef gfx::SourceSurface SourceSurface;
+
+public:
+ NS_DECL_ISUPPORTS_INHERITED
+
+ NS_IMETHOD GetWidth(int32_t* aWidth) override;
+ NS_IMETHOD GetHeight(int32_t* aHeight) override;
+ NS_IMETHOD GetIntrinsicSize(nsSize* aSize) override;
+ NS_IMETHOD GetIntrinsicRatio(nsSize* aRatio) override;
+ NS_IMETHOD_(already_AddRefed<SourceSurface>)
+ GetFrame(uint32_t aWhichFrame, uint32_t aFlags) override;
+ NS_IMETHOD_(already_AddRefed<SourceSurface>)
+ GetFrameAtSize(const gfx::IntSize& aSize,
+ uint32_t aWhichFrame,
+ uint32_t aFlags) override;
+ NS_IMETHOD_(bool) IsImageContainerAvailable(layers::LayerManager* aManager,
+ uint32_t aFlags) override;
+ NS_IMETHOD_(already_AddRefed<layers::ImageContainer>)
+ GetImageContainer(layers::LayerManager* aManager,
+ uint32_t aFlags) override;
+ NS_IMETHOD_(DrawResult) Draw(gfxContext* aContext,
+ const nsIntSize& aSize,
+ const ImageRegion& aRegion,
+ uint32_t aWhichFrame,
+ gfx::SamplingFilter aSamplingFilter,
+ const Maybe<SVGImageContext>& aSVGContext,
+ uint32_t aFlags) override;
+ NS_IMETHOD RequestDiscard() override;
+ NS_IMETHOD_(Orientation) GetOrientation() override;
+ NS_IMETHOD_(nsIntRect) GetImageSpaceInvalidationRect(const nsIntRect& aRect)
+ override;
+ nsIntSize OptimalImageSizeForDest(const gfxSize& aDest,
+ uint32_t aWhichFrame,
+ gfx::SamplingFilter aSamplingFilter,
+ uint32_t aFlags) override;
+
+protected:
+ ClippedImage(Image* aImage, nsIntRect aClip,
+ const Maybe<nsSize>& aSVGViewportSize);
+
+ virtual ~ClippedImage();
+
+private:
+ Pair<DrawResult, RefPtr<SourceSurface>>
+ GetFrameInternal(const nsIntSize& aSize,
+ const Maybe<SVGImageContext>& aSVGContext,
+ uint32_t aWhichFrame,
+ uint32_t aFlags);
+ bool ShouldClip();
+ DrawResult DrawSingleTile(gfxContext* aContext,
+ const nsIntSize& aSize,
+ const ImageRegion& aRegion,
+ uint32_t aWhichFrame,
+ gfx::SamplingFilter aSamplingFilter,
+ const Maybe<SVGImageContext>& aSVGContext,
+ uint32_t aFlags);
+
+ // If we are forced to draw a temporary surface, we cache it here.
+ UniquePtr<ClippedImageCachedSurface> mCachedSurface;
+
+ nsIntRect mClip; // The region to clip to.
+ Maybe<bool> mShouldClip; // Memoized ShouldClip() if present.
+ Maybe<nsIntSize> mSVGViewportSize; // If we're clipping a VectorImage, this
+ // is the size of viewport of that image.
+ friend class DrawSingleTileCallback;
+ friend class ImageOps;
+};
+
+} // namespace image
+} // namespace mozilla
+
+#endif // mozilla_image_ClippedImage_h