1 files changed, 79 insertions, 0 deletions
diff --git a/image/OrientedImage.h b/image/OrientedImage.h
new file mode 100644
index 000000000..604ab3d4f
--- /dev/null
+++ b/image/OrientedImage.h
@@ -0,0 +1,79 @@
+/* -*- 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_OrientedImage_h
+#define mozilla_image_OrientedImage_h
+
+#include "ImageWrapper.h"
+#include "mozilla/gfx/2D.h"
+#include "mozilla/RefPtr.h"
+#include "Orientation.h"
+
+namespace mozilla {
+namespace image {
+
+/**
+ * An Image wrapper that rotates and/or flips an image according to a specified
+ * Orientation.
+ *
+ * XXX(seth): There a known (performance, not correctness) issue with
+ * GetImageContainer. See the comments for that method for more information.
+ */
+class OrientedImage : 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_(nsIntRect) GetImageSpaceInvalidationRect(
+                                           const nsIntRect& aRect) override;
+  nsIntSize OptimalImageSizeForDest(const gfxSize& aDest,
+                                    uint32_t aWhichFrame,
+                                    gfx::SamplingFilter aSamplingFilter,
+                                    uint32_t aFlags) override;
+
+protected:
+  OrientedImage(Image* aImage, Orientation aOrientation)
+    : ImageWrapper(aImage)
+    , mOrientation(aOrientation)
+  { }
+
+  virtual ~OrientedImage() { }
+
+  gfxMatrix OrientationMatrix(const nsIntSize& aSize, bool aInvert = false);
+
+private:
+  Orientation mOrientation;
+
+  friend class ImageOps;
+};
+
+} // namespace image
+} // namespace mozilla
+
+#endif // mozilla_image_OrientedImage_h