1 files changed, 88 insertions, 0 deletions
diff --git a/gfx/layers/ImageDataSerializer.h b/gfx/layers/ImageDataSerializer.h
new file mode 100644
index 000000000..53a589d21
--- /dev/null
+++ b/gfx/layers/ImageDataSerializer.h
@@ -0,0 +1,88 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: sw=2 ts=8 et :
+ */
+/* 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 GFX_LAYERS_BLOBSURFACE_H
+#define GFX_LAYERS_BLOBSURFACE_H
+
+#include <stdint.h>                     // for uint8_t, uint32_t
+#include "mozilla/Attributes.h"         // for MOZ_STACK_CLASS
+#include "mozilla/RefPtr.h"             // for already_AddRefed
+#include "mozilla/gfx/Point.h"          // for IntSize
+#include "mozilla/gfx/Types.h"          // for SurfaceFormat
+#include "mozilla/layers/LayersSurfaces.h"  // for SurfaceDescriptor
+
+namespace mozilla {
+namespace gfx {
+class DataSourceSurface;
+class DrawTarget;
+} // namespace gfx
+} // namespace mozilla
+
+namespace mozilla {
+namespace layers {
+
+namespace ImageDataSerializer {
+
+// RGB
+
+int32_t ComputeRGBStride(gfx::SurfaceFormat aFormat, int32_t aWidth);
+
+int32_t GetRGBStride(const RGBDescriptor& aDescriptor);
+
+uint32_t ComputeRGBBufferSize(gfx::IntSize aSize, gfx::SurfaceFormat aFormat);
+
+
+// YCbCr
+
+///This function is meant as a helper to know how much shared memory we need
+///to allocate in a shmem in order to place a shared YCbCr image blob of
+///given dimensions.
+uint32_t ComputeYCbCrBufferSize(const gfx::IntSize& aYSize,
+                                int32_t aYStride,
+                                const gfx::IntSize& aCbCrSize,
+                                int32_t aCbCrStride);
+uint32_t ComputeYCbCrBufferSize(const gfx::IntSize& aYSize,
+                                const gfx::IntSize& aCbCrSize);
+
+uint32_t ComputeYCbCrBufferSize(uint32_t aBufferSize);
+
+void ComputeYCbCrOffsets(int32_t yStride, int32_t yHeight,
+                         int32_t cbCrStride, int32_t cbCrHeight,
+                         uint32_t& outYOffset, uint32_t& outCbOffset, uint32_t& outCrOffset);
+
+gfx::SurfaceFormat FormatFromBufferDescriptor(const BufferDescriptor& aDescriptor);
+
+gfx::IntSize SizeFromBufferDescriptor(const BufferDescriptor& aDescriptor);
+
+Maybe<gfx::IntSize> CbCrSizeFromBufferDescriptor(const BufferDescriptor& aDescriptor);
+
+Maybe<YUVColorSpace> YUVColorSpaceFromBufferDescriptor(const BufferDescriptor& aDescriptor);
+
+Maybe<StereoMode> StereoModeFromBufferDescriptor(const BufferDescriptor& aDescriptor);
+
+uint8_t* GetYChannel(uint8_t* aBuffer, const YCbCrDescriptor& aDescriptor);
+
+uint8_t* GetCbChannel(uint8_t* aBuffer, const YCbCrDescriptor& aDescriptor);
+
+uint8_t* GetCrChannel(uint8_t* aBuffer, const YCbCrDescriptor& aDescriptor);
+
+already_AddRefed<gfx::DataSourceSurface>
+DataSourceSurfaceFromYCbCrDescriptor(uint8_t* aBuffer, const YCbCrDescriptor& aDescriptor, gfx::DataSourceSurface* aSurface = nullptr);
+
+void ConvertAndScaleFromYCbCrDescriptor(uint8_t* aBuffer,
+                                        const YCbCrDescriptor& aDescriptor,
+                                        const gfx::SurfaceFormat& aDestFormat,
+                                        const gfx::IntSize& aDestSize,
+                                        unsigned char* aDestBuffer,
+                                        int32_t aStride);
+
+} // ImageDataSerializer
+
+} // namespace layers
+} // namespace mozilla
+
+#endif