gecko-dev/gfx/layers/ImageDataSerializer.h

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2.2 KiB
C++

/* -*- 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 TemporaryRef
#include "mozilla/gfx/Point.h" // for IntSize
#include "mozilla/gfx/Types.h" // for SurfaceFormat
class gfxImageSurface;
namespace mozilla {
namespace gfx {
class DataSourceSurface;
} // namespace gfx
} // namespace mozilla
namespace mozilla {
namespace layers {
class ImageDataSerializerBase
{
public:
bool IsValid() const;
uint8_t* GetData();
gfx::IntSize GetSize() const;
gfx::SurfaceFormat GetFormat() const;
TemporaryRef<gfx::DataSourceSurface> GetAsSurface();
TemporaryRef<gfxImageSurface> GetAsThebesSurface();
protected:
ImageDataSerializerBase(uint8_t* aData)
: mData(aData) {}
uint8_t* mData;
};
/**
* A facility to serialize an image into a buffer of memory.
* This is intended for use with the IPC code, in order to copy image data
* into shared memory.
* Note that there is a separate serializer class for YCbCr images
* (see YCbCrImageDataSerializer.h).
*/
class MOZ_STACK_CLASS ImageDataSerializer : public ImageDataSerializerBase
{
public:
ImageDataSerializer(uint8_t* aData) : ImageDataSerializerBase(aData) {}
void InitializeBufferInfo(gfx::IntSize aSize,
gfx::SurfaceFormat aFormat);
static uint32_t ComputeMinBufferSize(gfx::IntSize aSize,
gfx::SurfaceFormat aFormat);
};
/**
* A facility to deserialize image data that has been serialized by an
* ImageDataSerializer.
*/
class MOZ_STACK_CLASS ImageDataDeserializer : public ImageDataSerializerBase
{
public:
ImageDataDeserializer(uint8_t* aData) : ImageDataSerializerBase(aData) {}
};
} // namespace layers
} // namespace mozilla
#endif