michael@0: /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
michael@0:  * vim: sw=2 ts=8 et :
michael@0:  */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef GFX_LAYERS_BLOBSURFACE_H
michael@0: #define GFX_LAYERS_BLOBSURFACE_H
michael@0: 
michael@0: #include <stdint.h>                     // for uint8_t, uint32_t
michael@0: #include "mozilla/Attributes.h"         // for MOZ_STACK_CLASS
michael@0: #include "mozilla/RefPtr.h"             // for TemporaryRef
michael@0: #include "mozilla/gfx/Point.h"          // for IntSize
michael@0: #include "mozilla/gfx/Types.h"          // for SurfaceFormat
michael@0: 
michael@0: class gfxImageSurface;
michael@0: 
michael@0: namespace mozilla {
michael@0: namespace gfx {
michael@0: class DataSourceSurface;
michael@0: class DrawTarget;
michael@0: } // namespace gfx
michael@0: } // namespace mozilla
michael@0: 
michael@0: namespace mozilla {
michael@0: namespace layers {
michael@0: 
michael@0: class ImageDataSerializerBase
michael@0: {
michael@0: public:
michael@0:   bool IsValid() const { return mIsValid; }
michael@0: 
michael@0:   uint8_t* GetData();
michael@0:   uint32_t GetStride() const;
michael@0:   gfx::IntSize GetSize() const;
michael@0:   gfx::SurfaceFormat GetFormat() const;
michael@0:   TemporaryRef<gfx::DataSourceSurface> GetAsSurface();
michael@0:   TemporaryRef<gfxImageSurface> GetAsThebesSurface();
michael@0:   TemporaryRef<gfx::DrawTarget> GetAsDrawTarget(gfx::BackendType aBackend);
michael@0: 
michael@0:   static uint32_t ComputeMinBufferSize(gfx::IntSize aSize,
michael@0:                                        gfx::SurfaceFormat aFormat);
michael@0: 
michael@0: protected:
michael@0: 
michael@0:   ImageDataSerializerBase(uint8_t* aData, size_t aDataSize)
michael@0:     : mData(aData)
michael@0:     , mDataSize(aDataSize)
michael@0:     , mIsValid(false)
michael@0:   {}
michael@0: 
michael@0:   void Validate();
michael@0: 
michael@0:   uint8_t* mData;
michael@0:   size_t mDataSize;
michael@0:   bool mIsValid;
michael@0: };
michael@0: 
michael@0: /**
michael@0:  * A facility to serialize an image into a buffer of memory.
michael@0:  * This is intended for use with the IPC code, in order to copy image data
michael@0:  * into shared memory.
michael@0:  * Note that there is a separate serializer class for YCbCr images
michael@0:  * (see YCbCrImageDataSerializer.h).
michael@0:  */
michael@0: class MOZ_STACK_CLASS ImageDataSerializer : public ImageDataSerializerBase
michael@0: {
michael@0: public:
michael@0:   ImageDataSerializer(uint8_t* aData, size_t aDataSize)
michael@0:     : ImageDataSerializerBase(aData, aDataSize)
michael@0:   {
michael@0:     // a serializer needs to be usable before correct buffer info has been written to it
michael@0:     mIsValid = !!mData;
michael@0:   }
michael@0:   void InitializeBufferInfo(gfx::IntSize aSize,
michael@0:                             gfx::SurfaceFormat aFormat);
michael@0: };
michael@0: 
michael@0: /**
michael@0:  * A facility to deserialize image data that has been serialized by an
michael@0:  * ImageDataSerializer.
michael@0:  */
michael@0: class MOZ_STACK_CLASS ImageDataDeserializer : public ImageDataSerializerBase
michael@0: {
michael@0: public:
michael@0:   ImageDataDeserializer(uint8_t* aData, size_t aDataSize)
michael@0:     : ImageDataSerializerBase(aData, aDataSize)
michael@0:   {
michael@0:     Validate();
michael@0:   }
michael@0: 
michael@0: };
michael@0: 
michael@0: } // namespace layers
michael@0: } // namespace mozilla
michael@0: 
michael@0: #endif