gecko/gfx/layers/GrallocImages.h

149 lines
3.9 KiB
C++

/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* 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 GRALLOCIMAGES_H
#define GRALLOCIMAGES_H
#ifdef MOZ_WIDGET_GONK
#include "mozilla/layers/LayersSurfaces.h"
#include "ImageLayers.h"
#include "ImageContainer.h"
#include <ui/GraphicBuffer.h>
namespace mozilla {
namespace layers {
class GrallocTextureClientOGL;
/**
* The gralloc buffer maintained by android GraphicBuffer can be
* shared between the compositor thread and the producer thread. The
* mGraphicBuffer is owned by the producer thread, but when it is
* wrapped by GraphicBufferLocked and passed to the compositor, the
* buffer content is guaranteed to not change until Unlock() is
* called. Each producer must maintain their own buffer queue and
* implement the GraphicBufferLocked::Unlock() interface.
*/
class GraphicBufferLocked {
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(GraphicBufferLocked)
public:
GraphicBufferLocked(SurfaceDescriptor aGraphicBuffer)
: mSurfaceDescriptor(aGraphicBuffer)
{}
virtual ~GraphicBufferLocked() {}
virtual void Unlock() {}
SurfaceDescriptor GetSurfaceDescriptor()
{
return mSurfaceDescriptor;
}
protected:
SurfaceDescriptor mSurfaceDescriptor;
};
/**
* The YUV format supported by Android HAL
*
* 4:2:0 - CbCr width and height is half that of Y.
*
* This format assumes
* - an even width
* - an even height
* - a horizontal stride multiple of 16 pixels
* - a vertical stride equal to the height
*
* y_size = stride * height
* c_size = ALIGN(stride/2, 16) * height/2
* size = y_size + c_size * 2
* cr_offset = y_size
* cb_offset = y_size + c_size
*
* The Image that is rendered is the picture region defined by
* mPicX, mPicY and mPicSize. The size of the rendered image is
* mPicSize, not mYSize or mCbCrSize.
*/
class GrallocImage : public PlanarYCbCrImage
, public ISharedImage
{
typedef PlanarYCbCrImage::Data Data;
static uint32_t sColorIdMap[];
public:
struct GrallocData {
nsRefPtr<GraphicBufferLocked> mGraphicBuffer;
gfxIntSize mPicSize;
};
GrallocImage();
virtual ~GrallocImage();
/**
* This makes a copy of the data buffers, in order to support functioning
* in all different layer managers.
*/
virtual void SetData(const Data& aData);
/**
* Share the SurfaceDescriptor without making the copy, in order
* to support functioning in all different layer managers.
*/
virtual void SetData(const GrallocData& aData);
// From [android 4.0.4]/hardware/msm7k/libgralloc-qsd8k/gralloc_priv.h
enum {
/* OEM specific HAL formats */
HAL_PIXEL_FORMAT_YCbCr_422_P = 0x102,
HAL_PIXEL_FORMAT_YCbCr_420_P = 0x103,
HAL_PIXEL_FORMAT_YCbCr_420_SP = 0x109,
HAL_PIXEL_FORMAT_YCrCb_420_SP_ADRENO = 0x10A,
};
virtual already_AddRefed<gfxASurface> GetAsSurface();
void* GetNativeBuffer()
{
if (IsValid()) {
return GrallocBufferActor::GetFrom(GetSurfaceDescriptor())->getNativeBuffer();
} else {
return nullptr;
}
}
virtual bool IsValid() { return GetSurfaceDescriptor().type() != SurfaceDescriptor::T__None; }
SurfaceDescriptor GetSurfaceDescriptor() {
if (mGraphicBuffer.get()) {
return mGraphicBuffer->GetSurfaceDescriptor();
}
return SurfaceDescriptor();
}
virtual ISharedImage* AsSharedImage() MOZ_OVERRIDE { return this; }
virtual TextureClient* GetTextureClient() MOZ_OVERRIDE;
virtual uint8_t* GetBuffer()
{
return static_cast<uint8_t*>(GetNativeBuffer());
}
private:
bool mBufferAllocated;
nsRefPtr<GraphicBufferLocked> mGraphicBuffer;
RefPtr<GrallocTextureClientOGL> mTextureClient;
};
} // namespace layers
} // namespace mozilla
#endif
#endif /* GRALLOCIMAGES_H */