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