1 files changed, 113 insertions, 0 deletions
diff --git a/gfx/layers/ImageDataSerializer.h b/gfx/layers/ImageDataSerializer.h
new file mode 100644
index 0000000000..8584ea1a10
--- /dev/null
+++ b/gfx/layers/ImageDataSerializer.h
@@ -0,0 +1,113 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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/Rect.h"               // for IntRect
+#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, int32_t aYStride,
+                                const gfx::IntSize& aCbCrSize,
+                                int32_t aCbCrStride, uint32_t aYOffset,
+                                uint32_t aCbOffset, uint32_t aCrOffset);
+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);
+
+gfx::IntRect RectFromBufferDescriptor(const BufferDescriptor& aDescriptor);
+
+Maybe<gfx::IntSize> YSizeFromBufferDescriptor(
+    const BufferDescriptor& aDescriptor);
+
+Maybe<gfx::IntSize> CbCrSizeFromBufferDescriptor(
+    const BufferDescriptor& aDescriptor);
+
+Maybe<int32_t> YStrideFromBufferDescriptor(const BufferDescriptor& aDescriptor);
+
+Maybe<int32_t> CbCrStrideFromBufferDescriptor(
+    const BufferDescriptor& aDescriptor);
+
+Maybe<gfx::YUVColorSpace> YUVColorSpaceFromBufferDescriptor(
+    const BufferDescriptor& aDescriptor);
+
+Maybe<gfx::ColorDepth> ColorDepthFromBufferDescriptor(
+    const BufferDescriptor& aDescriptor);
+
+Maybe<gfx::ColorRange> ColorRangeFromBufferDescriptor(
+    const BufferDescriptor& aDescriptor);
+
+Maybe<StereoMode> StereoModeFromBufferDescriptor(
+    const BufferDescriptor& aDescriptor);
+
+Maybe<gfx::ChromaSubsampling> ChromaSubsamplingFromBufferDescriptor(
+    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);
+
+gfx::IntSize GetCroppedCbCrSize(const YCbCrDescriptor& aDescriptor);
+
+}  // namespace ImageDataSerializer
+
+}  // namespace layers
+}  // namespace mozilla
+
+#endif