Add m-esr52 at 52.6.0

1 files changed, 101 insertions, 0 deletions

diff --git a/image/ClippedImage.h b/image/ClippedImage.h
new file mode 100644
index 0000000000..140cc19090
--- /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