1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/layers/ImageDataSerializer.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,98 @@
1.4 +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
1.5 + * vim: sw=2 ts=8 et :
1.6 + */
1.7 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.8 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.9 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.10 +
1.11 +#ifndef GFX_LAYERS_BLOBSURFACE_H
1.12 +#define GFX_LAYERS_BLOBSURFACE_H
1.13 +
1.14 +#include <stdint.h> // for uint8_t, uint32_t
1.15 +#include "mozilla/Attributes.h" // for MOZ_STACK_CLASS
1.16 +#include "mozilla/RefPtr.h" // for TemporaryRef
1.17 +#include "mozilla/gfx/Point.h" // for IntSize
1.18 +#include "mozilla/gfx/Types.h" // for SurfaceFormat
1.19 +
1.20 +class gfxImageSurface;
1.21 +
1.22 +namespace mozilla {
1.23 +namespace gfx {
1.24 +class DataSourceSurface;
1.25 +class DrawTarget;
1.26 +} // namespace gfx
1.27 +} // namespace mozilla
1.28 +
1.29 +namespace mozilla {
1.30 +namespace layers {
1.31 +
1.32 +class ImageDataSerializerBase
1.33 +{
1.34 +public:
1.35 + bool IsValid() const { return mIsValid; }
1.36 +
1.37 + uint8_t* GetData();
1.38 + uint32_t GetStride() const;
1.39 + gfx::IntSize GetSize() const;
1.40 + gfx::SurfaceFormat GetFormat() const;
1.41 + TemporaryRef<gfx::DataSourceSurface> GetAsSurface();
1.42 + TemporaryRef<gfxImageSurface> GetAsThebesSurface();
1.43 + TemporaryRef<gfx::DrawTarget> GetAsDrawTarget(gfx::BackendType aBackend);
1.44 +
1.45 + static uint32_t ComputeMinBufferSize(gfx::IntSize aSize,
1.46 + gfx::SurfaceFormat aFormat);
1.47 +
1.48 +protected:
1.49 +
1.50 + ImageDataSerializerBase(uint8_t* aData, size_t aDataSize)
1.51 + : mData(aData)
1.52 + , mDataSize(aDataSize)
1.53 + , mIsValid(false)
1.54 + {}
1.55 +
1.56 + void Validate();
1.57 +
1.58 + uint8_t* mData;
1.59 + size_t mDataSize;
1.60 + bool mIsValid;
1.61 +};
1.62 +
1.63 +/**
1.64 + * A facility to serialize an image into a buffer of memory.
1.65 + * This is intended for use with the IPC code, in order to copy image data
1.66 + * into shared memory.
1.67 + * Note that there is a separate serializer class for YCbCr images
1.68 + * (see YCbCrImageDataSerializer.h).
1.69 + */
1.70 +class MOZ_STACK_CLASS ImageDataSerializer : public ImageDataSerializerBase
1.71 +{
1.72 +public:
1.73 + ImageDataSerializer(uint8_t* aData, size_t aDataSize)
1.74 + : ImageDataSerializerBase(aData, aDataSize)
1.75 + {
1.76 + // a serializer needs to be usable before correct buffer info has been written to it
1.77 + mIsValid = !!mData;
1.78 + }
1.79 + void InitializeBufferInfo(gfx::IntSize aSize,
1.80 + gfx::SurfaceFormat aFormat);
1.81 +};
1.82 +
1.83 +/**
1.84 + * A facility to deserialize image data that has been serialized by an
1.85 + * ImageDataSerializer.
1.86 + */
1.87 +class MOZ_STACK_CLASS ImageDataDeserializer : public ImageDataSerializerBase
1.88 +{
1.89 +public:
1.90 + ImageDataDeserializer(uint8_t* aData, size_t aDataSize)
1.91 + : ImageDataSerializerBase(aData, aDataSize)
1.92 + {
1.93 + Validate();
1.94 + }
1.95 +
1.96 +};
1.97 +
1.98 +} // namespace layers
1.99 +} // namespace mozilla
1.100 +
1.101 +#endif
