1 files changed, 99 insertions, 0 deletions
diff --git a/image/ImageMetadata.h b/image/ImageMetadata.h
new file mode 100644
index 000000000..05f572980
--- /dev/null
+++ b/image/ImageMetadata.h
@@ -0,0 +1,99 @@
+/* -*- 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_ImageMetadata_h
+#define mozilla_image_ImageMetadata_h
+
+#include <stdint.h>
+#include "mozilla/Maybe.h"
+#include "nsSize.h"
+#include "Orientation.h"
+
+namespace mozilla {
+namespace image {
+
+class RasterImage;
+
+// The metadata about an image that decoders accumulate as they decode.
+class ImageMetadata
+{
+public:
+  ImageMetadata()
+    : mLoopCount(-1)
+    , mFirstFrameTimeout(FrameTimeout::Forever())
+    , mHasAnimation(false)
+  { }
+
+  void SetHotspot(uint16_t aHotspotX, uint16_t aHotspotY)
+  {
+    mHotspot = Some(gfx::IntPoint(aHotspotX, aHotspotY));
+  }
+  gfx::IntPoint GetHotspot() const { return *mHotspot; }
+  bool HasHotspot() const { return mHotspot.isSome(); }
+
+  void SetLoopCount(int32_t loopcount)
+  {
+    mLoopCount = loopcount;
+  }
+  int32_t GetLoopCount() const { return mLoopCount; }
+
+  void SetLoopLength(FrameTimeout aLength) { mLoopLength = Some(aLength); }
+  FrameTimeout GetLoopLength() const { return *mLoopLength; }
+  bool HasLoopLength() const { return mLoopLength.isSome(); }
+
+  void SetFirstFrameTimeout(FrameTimeout aTimeout) { mFirstFrameTimeout = aTimeout; }
+  FrameTimeout GetFirstFrameTimeout() const { return mFirstFrameTimeout; }
+
+  void SetFirstFrameRefreshArea(const gfx::IntRect& aRefreshArea)
+  {
+    mFirstFrameRefreshArea = Some(aRefreshArea);
+  }
+  gfx::IntRect GetFirstFrameRefreshArea() const { return *mFirstFrameRefreshArea; }
+  bool HasFirstFrameRefreshArea() const { return mFirstFrameRefreshArea.isSome(); }
+
+  void SetSize(int32_t width, int32_t height, Orientation orientation)
+  {
+    if (!HasSize()) {
+      mSize.emplace(nsIntSize(width, height));
+      mOrientation.emplace(orientation);
+    }
+  }
+  nsIntSize GetSize() const { return *mSize; }
+  bool HasSize() const { return mSize.isSome(); }
+
+  Orientation GetOrientation() const { return *mOrientation; }
+  bool HasOrientation() const { return mOrientation.isSome(); }
+
+  void SetHasAnimation() { mHasAnimation = true; }
+  bool HasAnimation() const { return mHasAnimation; }
+
+private:
+  /// The hotspot found on cursors, if present.
+  Maybe<gfx::IntPoint> mHotspot;
+
+  /// The loop count for animated images, or -1 for infinite loop.
+  int32_t mLoopCount;
+
+  // The total length of a single loop through an animated image.
+  Maybe<FrameTimeout> mLoopLength;
+
+  /// The timeout of an animated image's first frame.
+  FrameTimeout mFirstFrameTimeout;
+
+  // The area of the image that needs to be invalidated when the animation
+  // loops.
+  Maybe<gfx::IntRect> mFirstFrameRefreshArea;
+
+  Maybe<nsIntSize> mSize;
+  Maybe<Orientation> mOrientation;
+
+  bool mHasAnimation : 1;
+};
+
+} // namespace image
+} // namespace mozilla
+
+#endif // mozilla_image_ImageMetadata_h