1 files changed, 150 insertions, 0 deletions
diff --git a/image/Image.cpp b/image/Image.cpp
new file mode 100644
index 000000000..b757a60f7
--- /dev/null
+++ b/image/Image.cpp
@@ -0,0 +1,150 @@
+/* -*- 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/. */
+
+#include "Image.h"
+#include "nsRefreshDriver.h"
+#include "mozilla/TimeStamp.h"
+
+namespace mozilla {
+namespace image {
+
+///////////////////////////////////////////////////////////////////////////////
+// Memory Reporting
+///////////////////////////////////////////////////////////////////////////////
+
+ImageMemoryCounter::ImageMemoryCounter(Image* aImage,
+                                       MallocSizeOf aMallocSizeOf,
+                                       bool aIsUsed)
+  : mIsUsed(aIsUsed)
+{
+  MOZ_ASSERT(aImage);
+
+  // Extract metadata about the image.
+  RefPtr<ImageURL> imageURL(aImage->GetURI());
+  if (imageURL) {
+    imageURL->GetSpec(mURI);
+  }
+
+  int32_t width = 0;
+  int32_t height = 0;
+  aImage->GetWidth(&width);
+  aImage->GetHeight(&height);
+  mIntrinsicSize.SizeTo(width, height);
+
+  mType = aImage->GetType();
+
+  // Populate memory counters for source and decoded data.
+  mValues.SetSource(aImage->SizeOfSourceWithComputedFallback(aMallocSizeOf));
+  aImage->CollectSizeOfSurfaces(mSurfaces, aMallocSizeOf);
+
+  // Compute totals.
+  for (const SurfaceMemoryCounter& surfaceCounter : mSurfaces) {
+    mValues += surfaceCounter.Values();
+  }
+}
+
+
+///////////////////////////////////////////////////////////////////////////////
+// Image Base Types
+///////////////////////////////////////////////////////////////////////////////
+
+// Constructor
+ImageResource::ImageResource(ImageURL* aURI) :
+  mURI(aURI),
+  mInnerWindowId(0),
+  mAnimationConsumers(0),
+  mAnimationMode(kNormalAnimMode),
+  mInitialized(false),
+  mAnimating(false),
+  mError(false)
+{ }
+
+ImageResource::~ImageResource()
+{
+  // Ask our ProgressTracker to drop its weak reference to us.
+  mProgressTracker->ResetImage();
+}
+
+void
+ImageResource::IncrementAnimationConsumers()
+{
+  MOZ_ASSERT(NS_IsMainThread(), "Main thread only to encourage serialization "
+                                "with DecrementAnimationConsumers");
+  mAnimationConsumers++;
+}
+
+void
+ImageResource::DecrementAnimationConsumers()
+{
+  MOZ_ASSERT(NS_IsMainThread(), "Main thread only to encourage serialization "
+                                "with IncrementAnimationConsumers");
+  MOZ_ASSERT(mAnimationConsumers >= 1,
+             "Invalid no. of animation consumers!");
+  mAnimationConsumers--;
+}
+
+nsresult
+ImageResource::GetAnimationModeInternal(uint16_t* aAnimationMode)
+{
+  if (mError) {
+    return NS_ERROR_FAILURE;
+  }
+
+  NS_ENSURE_ARG_POINTER(aAnimationMode);
+
+  *aAnimationMode = mAnimationMode;
+  return NS_OK;
+}
+
+nsresult
+ImageResource::SetAnimationModeInternal(uint16_t aAnimationMode)
+{
+  if (mError) {
+    return NS_ERROR_FAILURE;
+  }
+
+  NS_ASSERTION(aAnimationMode == kNormalAnimMode ||
+               aAnimationMode == kDontAnimMode ||
+               aAnimationMode == kLoopOnceAnimMode,
+               "Wrong Animation Mode is being set!");
+
+  mAnimationMode = aAnimationMode;
+
+  return NS_OK;
+}
+
+bool
+ImageResource::HadRecentRefresh(const TimeStamp& aTime)
+{
+  // Our threshold for "recent" is 1/2 of the default refresh-driver interval.
+  // This ensures that we allow for frame rates at least as fast as the
+  // refresh driver's default rate.
+  static TimeDuration recentThreshold =
+      TimeDuration::FromMilliseconds(nsRefreshDriver::DefaultInterval() / 2.0);
+
+  if (!mLastRefreshTime.IsNull() &&
+      aTime - mLastRefreshTime < recentThreshold) {
+    return true;
+  }
+
+  // else, we can proceed with a refresh.
+  // But first, update our last refresh time:
+  mLastRefreshTime = aTime;
+  return false;
+}
+
+void
+ImageResource::EvaluateAnimation()
+{
+  if (!mAnimating && ShouldAnimate()) {
+    nsresult rv = StartAnimation();
+    mAnimating = NS_SUCCEEDED(rv);
+  } else if (mAnimating && !ShouldAnimate()) {
+    StopAnimation();
+  }
+}
+
+} // namespace image
+} // namespace mozilla