1 files changed, 150 insertions, 0 deletions
diff --git a/image/ImageOps.cpp b/image/ImageOps.cpp
new file mode 100644
index 000000000..addee7f15
--- /dev/null
+++ b/image/ImageOps.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 "ImageOps.h"
+
+#include "ClippedImage.h"
+#include "DecodePool.h"
+#include "Decoder.h"
+#include "DecoderFactory.h"
+#include "DynamicImage.h"
+#include "FrozenImage.h"
+#include "IDecodingTask.h"
+#include "Image.h"
+#include "imgIContainer.h"
+#include "mozilla/gfx/2D.h"
+#include "nsStreamUtils.h"
+#include "OrientedImage.h"
+#include "SourceBuffer.h"
+
+using namespace mozilla::gfx;
+
+namespace mozilla {
+namespace image {
+
+/* static */ already_AddRefed<Image>
+ImageOps::Freeze(Image* aImage)
+{
+  RefPtr<Image> frozenImage = new FrozenImage(aImage);
+  return frozenImage.forget();
+}
+
+/* static */ already_AddRefed<imgIContainer>
+ImageOps::Freeze(imgIContainer* aImage)
+{
+  nsCOMPtr<imgIContainer> frozenImage =
+    new FrozenImage(static_cast<Image*>(aImage));
+  return frozenImage.forget();
+}
+
+/* static */ already_AddRefed<Image>
+ImageOps::Clip(Image* aImage, nsIntRect aClip,
+               const Maybe<nsSize>& aSVGViewportSize)
+{
+  RefPtr<Image> clippedImage = new ClippedImage(aImage, aClip, aSVGViewportSize);
+  return clippedImage.forget();
+}
+
+/* static */ already_AddRefed<imgIContainer>
+ImageOps::Clip(imgIContainer* aImage, nsIntRect aClip,
+               const Maybe<nsSize>& aSVGViewportSize)
+{
+  nsCOMPtr<imgIContainer> clippedImage =
+    new ClippedImage(static_cast<Image*>(aImage), aClip, aSVGViewportSize);
+  return clippedImage.forget();
+}
+
+/* static */ already_AddRefed<Image>
+ImageOps::Orient(Image* aImage, Orientation aOrientation)
+{
+  RefPtr<Image> orientedImage = new OrientedImage(aImage, aOrientation);
+  return orientedImage.forget();
+}
+
+/* static */ already_AddRefed<imgIContainer>
+ImageOps::Orient(imgIContainer* aImage, Orientation aOrientation)
+{
+  nsCOMPtr<imgIContainer> orientedImage =
+    new OrientedImage(static_cast<Image*>(aImage), aOrientation);
+  return orientedImage.forget();
+}
+
+/* static */ already_AddRefed<imgIContainer>
+ImageOps::CreateFromDrawable(gfxDrawable* aDrawable)
+{
+  nsCOMPtr<imgIContainer> drawableImage = new DynamicImage(aDrawable);
+  return drawableImage.forget();
+}
+
+/* static */ already_AddRefed<gfx::SourceSurface>
+ImageOps::DecodeToSurface(nsIInputStream* aInputStream,
+                          const nsACString& aMimeType,
+                          uint32_t aFlags)
+{
+  MOZ_ASSERT(aInputStream);
+
+  nsresult rv;
+
+  // Prepare the input stream.
+  nsCOMPtr<nsIInputStream> inputStream = aInputStream;
+  if (!NS_InputStreamIsBuffered(aInputStream)) {
+    nsCOMPtr<nsIInputStream> bufStream;
+    rv = NS_NewBufferedInputStream(getter_AddRefs(bufStream),
+                                   aInputStream, 1024);
+    if (NS_SUCCEEDED(rv)) {
+      inputStream = bufStream;
+    }
+  }
+
+  // Figure out how much data we've been passed.
+  uint64_t length;
+  rv = inputStream->Available(&length);
+  if (NS_FAILED(rv) || length > UINT32_MAX) {
+    return nullptr;
+  }
+
+  // Write the data into a SourceBuffer.
+  NotNull<RefPtr<SourceBuffer>> sourceBuffer = WrapNotNull(new SourceBuffer());
+  sourceBuffer->ExpectLength(length);
+  rv = sourceBuffer->AppendFromInputStream(inputStream, length);
+  if (NS_FAILED(rv)) {
+    return nullptr;
+  }
+  sourceBuffer->Complete(NS_OK);
+
+  // Create a decoder.
+  DecoderType decoderType =
+    DecoderFactory::GetDecoderType(PromiseFlatCString(aMimeType).get());
+  RefPtr<Decoder> decoder =
+    DecoderFactory::CreateAnonymousDecoder(decoderType, sourceBuffer,
+                                           Nothing(), ToSurfaceFlags(aFlags));
+  if (!decoder) {
+    return nullptr;
+  }
+
+  // Run the decoder synchronously.
+  RefPtr<IDecodingTask> task = new AnonymousDecodingTask(WrapNotNull(decoder));
+  task->Run();
+  if (!decoder->GetDecodeDone() || decoder->HasError()) {
+    return nullptr;
+  }
+
+  // Pull out the surface.
+  RawAccessFrameRef frame = decoder->GetCurrentFrameRef();
+  if (!frame) {
+    return nullptr;
+  }
+
+  RefPtr<SourceSurface> surface = frame->GetSourceSurface();
+  if (!surface) {
+    return nullptr;
+  }
+
+  return surface.forget();
+}
+
+} // namespace image
+} // namespace mozilla