diff -r 000000000000 -r 6474c204b198 image/src/Image.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/image/src/Image.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,143 @@
+/* -*- 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 "nsMimeTypes.h"
+
+#include "Image.h"
+
+namespace mozilla {
+namespace image {
+
+// Constructor
+ImageResource::ImageResource(ImageURL* aURI) :
+  mURI(aURI),
+  mInnerWindowId(0),
+  mAnimationConsumers(0),
+  mAnimationMode(kNormalAnimMode),
+  mInitialized(false),
+  mAnimating(false),
+  mError(false)
+{
+}
+
+uint32_t
+ImageResource::SizeOfData()
+{
+  if (mError)
+    return 0;
+
+  // This is not used by memory reporters, but for sizing the cache, which is
+  // why it uses |moz_malloc_size_of| rather than a
+  // |MOZ_DEFINE_MALLOC_SIZE_OF|.
+  return uint32_t(HeapSizeOfSourceWithComputedFallback(moz_malloc_size_of) +
+                  HeapSizeOfDecodedWithComputedFallback(moz_malloc_size_of) +
+                  NonHeapSizeOfDecoded() +
+                  OutOfProcessSizeOfDecoded());
+}
+
+// Translates a mimetype into a concrete decoder
+Image::eDecoderType
+Image::GetDecoderType(const char *aMimeType)
+{
+  // By default we don't know
+  eDecoderType rv = eDecoderType_unknown;
+
+  // PNG
+  if (!strcmp(aMimeType, IMAGE_PNG))
+    rv = eDecoderType_png;
+  else if (!strcmp(aMimeType, IMAGE_X_PNG))
+    rv = eDecoderType_png;
+
+  // GIF
+  else if (!strcmp(aMimeType, IMAGE_GIF))
+    rv = eDecoderType_gif;
+
+
+  // JPEG
+  else if (!strcmp(aMimeType, IMAGE_JPEG))
+    rv = eDecoderType_jpeg;
+  else if (!strcmp(aMimeType, IMAGE_PJPEG))
+    rv = eDecoderType_jpeg;
+  else if (!strcmp(aMimeType, IMAGE_JPG))
+    rv = eDecoderType_jpeg;
+
+  // BMP
+  else if (!strcmp(aMimeType, IMAGE_BMP))
+    rv = eDecoderType_bmp;
+  else if (!strcmp(aMimeType, IMAGE_BMP_MS))
+    rv = eDecoderType_bmp;
+
+
+  // ICO
+  else if (!strcmp(aMimeType, IMAGE_ICO))
+    rv = eDecoderType_ico;
+  else if (!strcmp(aMimeType, IMAGE_ICO_MS))
+    rv = eDecoderType_ico;
+
+  // Icon
+  else if (!strcmp(aMimeType, IMAGE_ICON_MS))
+    rv = eDecoderType_icon;
+
+  return rv;
+}
+
+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");
+  NS_ABORT_IF_FALSE(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;
+}
+
+void
+ImageResource::EvaluateAnimation()
+{
+  if (!mAnimating && ShouldAnimate()) {
+    nsresult rv = StartAnimation();
+    mAnimating = NS_SUCCEEDED(rv);
+  } else if (mAnimating && !ShouldAnimate()) {
+    StopAnimation();
+  }
+}
+
+} // namespace image
+} // namespace mozilla