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gecko-dev/gfx/layers/ImageContainer.h

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/* -*- 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 GFX_IMAGECONTAINER_H
#define GFX_IMAGECONTAINER_H
#include <stdint.h> // for uint32_t, uint8_t, uint64_t
#include <sys/types.h> // for int32_t
#include "gfxTypes.h"
#include "ImageTypes.h" // for ImageFormat, etc
#include "mozilla/Assertions.h" // for MOZ_ASSERT_HELPER2
#include "mozilla/Mutex.h" // for Mutex
#include "mozilla/ReentrantMonitor.h" // for ReentrantMonitorAutoEnter, etc
#include "mozilla/TimeStamp.h" // for TimeStamp
#include "mozilla/gfx/Point.h" // For IntSize
#include "mozilla/layers/LayersTypes.h" // for LayersBackend, etc
#include "mozilla/mozalloc.h" // for operator delete, etc
#include "nsAutoPtr.h" // for nsRefPtr, nsAutoArrayPtr, etc
#include "nsAutoRef.h" // for nsCountedRef
#include "nsCOMPtr.h" // for already_AddRefed
#include "nsDebug.h" // for NS_ASSERTION
#include "nsISupportsImpl.h" // for Image::Release, etc
#include "nsRect.h" // for mozilla::gfx::IntRect
#include "nsTArray.h" // for nsTArray
#include "mozilla/Atomics.h"
#include "mozilla/WeakPtr.h"
#include "nsThreadUtils.h"
#include "mozilla/gfx/2D.h"
#include "nsDataHashtable.h"
#include "mozilla/EnumeratedArray.h"
#ifndef XPCOM_GLUE_AVOID_NSPR
/**
* We need to be able to hold a reference to a Moz2D SourceSurface from Image
* subclasses. This is potentially a problem since Images can be addrefed
* or released off the main thread. We can ensure that we never AddRef
* a SourceSurface off the main thread, but we might want to Release due
* to an Image being destroyed off the main thread.
*
* We use nsCountedRef<nsMainThreadSourceSurfaceRef> to reference the
* SourceSurface. When AddRefing, we assert that we're on the main thread.
* When Releasing, if we're not on the main thread, we post an event to
* the main thread to do the actual release.
*/
class nsMainThreadSourceSurfaceRef;
template <>
class nsAutoRefTraits<nsMainThreadSourceSurfaceRef> {
public:
typedef mozilla::gfx::SourceSurface* RawRef;
/**
* The XPCOM event that will do the actual release on the main thread.
*/
class SurfaceReleaser : public nsRunnable {
public:
explicit SurfaceReleaser(RawRef aRef) : mRef(aRef) {}
NS_IMETHOD Run() {
mRef->Release();
return NS_OK;
}
RawRef mRef;
};
static RawRef Void() { return nullptr; }
static void Release(RawRef aRawRef)
{
if (NS_IsMainThread()) {
aRawRef->Release();
return;
}
nsCOMPtr<nsIRunnable> runnable = new SurfaceReleaser(aRawRef);
NS_DispatchToMainThread(runnable);
}
static void AddRef(RawRef aRawRef)
{
NS_ASSERTION(NS_IsMainThread(),
"Can only add a reference on the main thread");
aRawRef->AddRef();
}
};
#endif
#ifdef XP_WIN
struct ID3D10Texture2D;
struct ID3D10Device;
struct ID3D10ShaderResourceView;
#endif
typedef void* HANDLE;
namespace mozilla {
namespace layers {
class ImageClient;
class ImageCompositeNotification;
class ImageContainerChild;
class PImageContainerChild;
class SharedPlanarYCbCrImage;
class TextureClient;
class CompositableClient;
class GrallocImage;
struct ImageBackendData
{
virtual ~ImageBackendData() {}
protected:
ImageBackendData() {}
};
/**
* A class representing a buffer of pixel data. The data can be in one
* of various formats including YCbCr.
*
* Create an image using an ImageContainer. Fill the image with data, and
* then call ImageContainer::SetImage to display it. An image must not be
* modified after calling SetImage. Image implementations do not need to
* perform locking; when filling an Image, the Image client is responsible
* for ensuring only one thread accesses the Image at a time, and after
* SetImage the image is immutable.
*
* When resampling an Image, only pixels within the buffer should be
* sampled. For example, cairo images should be sampled in EXTEND_PAD mode.
*/
class Image {
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(Image)
public:
ImageFormat GetFormat() { return mFormat; }
void* GetImplData() { return mImplData; }
virtual gfx::IntSize GetSize() = 0;
virtual gfx::IntRect GetPictureRect()
{
return gfx::IntRect(0, 0, GetSize().width, GetSize().height);
}
ImageBackendData* GetBackendData(LayersBackend aBackend)
{ return mBackendData[aBackend]; }
void SetBackendData(LayersBackend aBackend, ImageBackendData* aData)
{ mBackendData[aBackend] = aData; }
int32_t GetSerial() { return mSerial; }
virtual already_AddRefed<gfx::SourceSurface> GetAsSourceSurface() = 0;
virtual GrallocImage* AsGrallocImage()
{
return nullptr;
}
virtual bool IsValid() { return true; }
virtual uint8_t* GetBuffer() { return nullptr; }
/**
* For use with the CompositableClient only (so that the later can
* synchronize the TextureClient with the TextureHost).
*/
virtual TextureClient* GetTextureClient(CompositableClient* aClient) { return nullptr; }
protected:
Image(void* aImplData, ImageFormat aFormat) :
mImplData(aImplData),
mSerial(++sSerialCounter),
mFormat(aFormat)
{}
// Protected destructor, to discourage deletion outside of Release():
virtual ~Image() {}
mozilla::EnumeratedArray<mozilla::layers::LayersBackend,
mozilla::layers::LayersBackend::LAYERS_LAST,
nsAutoPtr<ImageBackendData>>
mBackendData;
void* mImplData;
int32_t mSerial;
ImageFormat mFormat;
bool mSent;
static mozilla::Atomic<int32_t> sSerialCounter;
};
/**
* A RecycleBin is owned by an ImageContainer. We store buffers in it that we
* want to recycle from one image to the next.It's a separate object from
* ImageContainer because images need to store a strong ref to their RecycleBin
* and we must avoid creating a reference loop between an ImageContainer and
* its active image.
*/
class BufferRecycleBin final {
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(BufferRecycleBin)
//typedef mozilla::gl::GLContext GLContext;
public:
BufferRecycleBin();
void RecycleBuffer(uint8_t* aBuffer, uint32_t aSize);
// Returns a recycled buffer of the right size, or allocates a new buffer.
uint8_t* GetBuffer(uint32_t aSize);
private:
typedef mozilla::Mutex Mutex;
// Private destructor, to discourage deletion outside of Release():
~BufferRecycleBin()
{
}
// This protects mRecycledBuffers, mRecycledBufferSize, mRecycledTextures
// and mRecycledTextureSizes
Mutex mLock;
// We should probably do something to prune this list on a timer so we don't
// eat excess memory while video is paused...
nsTArray<nsAutoArrayPtr<uint8_t> > mRecycledBuffers;
// This is only valid if mRecycledBuffers is non-empty
uint32_t mRecycledBufferSize;
};
/**
* A class that manages Image creation for a LayerManager. The only reason
* we need a separate class here is that LayerManagers aren't threadsafe
* (because layers can only be used on the main thread) and we want to
* be able to create images from any thread, to facilitate video playback
* without involving the main thread, for example.
* Different layer managers can implement child classes of this making it
* possible to create layer manager specific images.
* This class is not meant to be used directly but rather can be set on an
* image container. This is usually done by the layer system internally and
* not explicitly by users. For PlanarYCbCr or Cairo images the default
* implementation will creates images whose data lives in system memory, for
* MacIOSurfaces the default implementation will be a simple MacIOSurface
* wrapper.
*/
class ImageFactory
{
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(ImageFactory)
protected:
friend class ImageContainer;
ImageFactory() {}
virtual ~ImageFactory() {}
virtual already_AddRefed<Image> CreateImage(ImageFormat aFormat,
const gfx::IntSize &aScaleHint,
BufferRecycleBin *aRecycleBin);
};
/**
* A class that manages Images for an ImageLayer. The only reason
* we need a separate class here is that ImageLayers aren't threadsafe
* (because layers can only be used on the main thread) and we want to
* be able to set the current Image from any thread, to facilitate
* video playback without involving the main thread, for example.
*
* An ImageContainer can operate in one of these modes:
* 1) Normal. Triggered by constructing the ImageContainer with
* DISABLE_ASYNC or when compositing is happening on the main thread.
* SetCurrentImages changes ImageContainer state but nothing is sent to the
* compositor until the next layer transaction.
* 2) Asynchronous. Initiated by constructing the ImageContainer with
* ENABLE_ASYNC when compositing is happening on the main thread.
* SetCurrentImages sends a message through the ImageBridge to the compositor
* thread to update the image, without going through the main thread or
* a layer transaction.
* The ImageContainer uses a shared memory block containing a cross-process mutex
* to communicate with the compositor thread. SetCurrentImage synchronously
* updates the shared state to point to the new image and the old image
* is immediately released (not true in Normal or Asynchronous modes).
*/
class ImageContainer final : public SupportsWeakPtr<ImageContainer> {
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(ImageContainer)
public:
MOZ_DECLARE_WEAKREFERENCE_TYPENAME(ImageContainer)
enum Mode { SYNCHRONOUS = 0x0, ASYNCHRONOUS = 0x01, ASYNCHRONOUS_OVERLAY = 0x02 };
explicit ImageContainer(ImageContainer::Mode flag = SYNCHRONOUS);
typedef uint32_t FrameID;
typedef uint32_t ProducerID;
/**
* Create an Image in one of the given formats.
* Picks the "best" format from the list and creates an Image of that
* format.
* Returns null if this backend does not support any of the formats.
* Can be called on any thread. This method takes mReentrantMonitor
* when accessing thread-shared state.
*/
B2G_ACL_EXPORT already_AddRefed<Image> CreateImage(ImageFormat aFormat);
struct NonOwningImage {
explicit NonOwningImage(Image* aImage = nullptr,
TimeStamp aTimeStamp = TimeStamp(),
FrameID aFrameID = 0,
ProducerID aProducerID = 0)
: mImage(aImage), mTimeStamp(aTimeStamp), mFrameID(aFrameID),
mProducerID(aProducerID) {}
Image* mImage;
TimeStamp mTimeStamp;
FrameID mFrameID;
ProducerID mProducerID;
};
/**
* Set aImages as the list of timestamped to display. The Images must have
* been created by this ImageContainer.
* Can be called on any thread. This method takes mReentrantMonitor
* when accessing thread-shared state.
* aImages must be non-empty. The first timestamp in the list may be
* null but the others must not be, and the timestamps must increase.
* Every element of aImages must have non-null mImage.
* mFrameID can be zero, in which case you won't get meaningful
* painted/dropped frame counts. Otherwise you should use a unique and
* increasing ID for each decoded and submitted frame (but it's OK to
* pass the same frame to SetCurrentImages).
* mProducerID is a unique ID for the stream of images. A change in the
* mProducerID means changing to a new mFrameID namespace. All frames in
* aImages must have the same mProducerID.
*
* The Image data must not be modified after this method is called!
* Note that this must not be called if ENABLE_ASYNC has not been set.
*
* The implementation calls CurrentImageChanged() while holding
* mReentrantMonitor.
*
* If this ImageContainer has an ImageClient for async video:
* Schedule a task to send the image to the compositor using the
* PImageBridge protcol without using the main thread.
*/
void SetCurrentImages(const nsTArray<NonOwningImage>& aImages);
/**
* Clear all images. Let ImageClient release all TextureClients.
*/
void ClearAllImages();
/**
* Clear the current images.
* This function is expect to be called only from a CompositableClient
* that belongs to ImageBridgeChild. Created to prevent dead lock.
* See Bug 901224.
*/
void ClearImagesFromImageBridge();
/**
* Set an Image as the current image to display. The Image must have
* been created by this ImageContainer.
* Must be called on the main thread, within a layers transaction.
*
* This method takes mReentrantMonitor
* when accessing thread-shared state.
* aImage can be null. While it's null, nothing will be painted.
*
* The Image data must not be modified after this method is called!
* Note that this must not be called if ENABLE_ASYNC been set.
*
* You won't get meaningful painted/dropped counts when using this method.
*/
void SetCurrentImageInTransaction(Image* aImage);
/**
* Returns true if this ImageContainer uses the ImageBridge IPDL protocol.
*
* Can be called from any thread.
*/
bool IsAsync() const;
/**
* If this ImageContainer uses ImageBridge, returns the ID associated to
* this container, for use in the ImageBridge protocol.
* Returns 0 if this ImageContainer does not use ImageBridge. Note that
* 0 is always an invalid ID for asynchronous image containers.
*
* Can be called from any thread.
*/
uint64_t GetAsyncContainerID() const;
/**
* Returns if the container currently has an image.
* Can be called on any thread. This method takes mReentrantMonitor
* when accessing thread-shared state.
*/
bool HasCurrentImage();
struct OwningImage {
OwningImage() : mFrameID(0), mProducerID(0), mComposited(false) {}
nsRefPtr<Image> mImage;
TimeStamp mTimeStamp;
FrameID mFrameID;
ProducerID mProducerID;
bool mComposited;
};
/**
* Copy the current Image list to aImages.
* This has to add references since otherwise there are race conditions
* where the current image is destroyed before the caller can add
* a reference.
* Can be called on any thread.
* May return an empty list to indicate there is no current image.
* If aGenerationCounter is non-null, sets *aGenerationCounter to a value
* that's unique for this ImageContainer state.
*/
void GetCurrentImages(nsTArray<OwningImage>* aImages,
uint32_t* aGenerationCounter = nullptr);
/**
* Returns the size of the image in pixels.
* Can be called on any thread. This method takes mReentrantMonitor when accessing
* thread-shared state.
*/
gfx::IntSize GetCurrentSize();
/**
* Sets a size that the image is expected to be rendered at.
* This is a hint for image backends to optimize scaling.
* Default implementation in this class is to ignore the hint.
* Can be called on any thread. This method takes mReentrantMonitor
* when accessing thread-shared state.
*/
void SetScaleHint(const gfx::IntSize& aScaleHint)
{ mScaleHint = aScaleHint; }
void SetImageFactory(ImageFactory *aFactory)
{
ReentrantMonitorAutoEnter mon(mReentrantMonitor);
mImageFactory = aFactory ? aFactory : new ImageFactory();
}
ImageFactory* GetImageFactory() const
{
return mImageFactory;
}
/**
* Returns the delay between the last composited image's presentation
* timestamp and when it was first composited. It's possible for the delay
* to be negative if the first image in the list passed to SetCurrentImages
* has a presentation timestamp greater than "now".
* Returns 0 if the composited image had a null timestamp, or if no
* image has been composited yet.
*/
TimeDuration GetPaintDelay()
{
ReentrantMonitorAutoEnter mon(mReentrantMonitor);
return mPaintDelay;
}
/**
* Returns the number of images which have been contained in this container
* and painted at least once. Can be called from any thread.
*/
uint32_t GetPaintCount() {
ReentrantMonitorAutoEnter mon(mReentrantMonitor);
return mPaintCount;
}
/**
* An entry in the current image list "expires" when the entry has an
* non-null timestamp, and in a SetCurrentImages call the new image list is
* non-empty, the timestamp of the first new image is non-null and greater
* than the timestamp associated with the image, and the first new image's
* frameID is not the same as the entry's.
* Every expired image that is never composited is counted as dropped.
*/
uint32_t GetDroppedImageCount()
{
ReentrantMonitorAutoEnter mon(mReentrantMonitor);
return mDroppedImageCount;
}
PImageContainerChild* GetPImageContainerChild();
static void NotifyComposite(const ImageCompositeNotification& aNotification);
/**
* Main thread only.
*/
static ProducerID AllocateProducerID();
private:
typedef mozilla::ReentrantMonitor ReentrantMonitor;
// Private destructor, to discourage deletion outside of Release():
B2G_ACL_EXPORT ~ImageContainer();
void SetCurrentImageInternal(const nsTArray<NonOwningImage>& aImages);
// This is called to ensure we have an active image, this may not be true
// when we're storing image information in a RemoteImageData structure.
// NOTE: If we have remote data mRemoteDataMutex should be locked when
// calling this function!
void EnsureActiveImage();
void NotifyCompositeInternal(const ImageCompositeNotification& aNotification);
// ReentrantMonitor to protect thread safe access to the "current
// image", and any other state which is shared between threads.
ReentrantMonitor mReentrantMonitor;
nsTArray<OwningImage> mCurrentImages;
// Updates every time mActiveImage changes
uint32_t mGenerationCounter;
// Number of contained images that have been painted at least once. It's up
// to the ImageContainer implementation to ensure accesses to this are
// threadsafe.
uint32_t mPaintCount;
// See GetPaintDelay. Accessed only with mReentrantMonitor held.
TimeDuration mPaintDelay;
// See GetDroppedImageCount. Accessed only with mReentrantMonitor held.
uint32_t mDroppedImageCount;
// This is the image factory used by this container, layer managers using
// this container can set an alternative image factory that will be used to
// create images for this container.
nsRefPtr<ImageFactory> mImageFactory;
gfx::IntSize mScaleHint;
nsRefPtr<BufferRecycleBin> mRecycleBin;
// This member points to an ImageClient if this ImageContainer was
// sucessfully created with ENABLE_ASYNC, or points to null otherwise.
// 'unsuccessful' in this case only means that the ImageClient could not
// be created, most likely because off-main-thread compositing is not enabled.
// In this case the ImageContainer is perfectly usable, but it will forward
// frames to the compositor through transactions in the main thread rather than
// asynchronusly using the ImageBridge IPDL protocol.
ImageClient* mImageClient;
nsTArray<FrameID> mFrameIDsNotYetComposited;
// ProducerID for last current image(s), including the frames in
// mFrameIDsNotYetComposited
ProducerID mCurrentProducerID;
// Object must be released on the ImageBridge thread. Field is immutable
// after creation of the ImageContainer.
ImageContainerChild* mIPDLChild;
static mozilla::Atomic<uint32_t> sGenerationCounter;
};
class AutoLockImage
{
public:
explicit AutoLockImage(ImageContainer *aContainer)
{
aContainer->GetCurrentImages(&mImages);
}
bool HasImage() const { return !mImages.IsEmpty(); }
Image* GetImage() const
{
return mImages.IsEmpty() ? nullptr : mImages[0].mImage.get();
}
private:
nsAutoTArray<ImageContainer::OwningImage,4> mImages;
};
struct PlanarYCbCrData {
// Luminance buffer
uint8_t* mYChannel;
int32_t mYStride;
gfx::IntSize mYSize;
int32_t mYSkip;
// Chroma buffers
uint8_t* mCbChannel;
uint8_t* mCrChannel;
int32_t mCbCrStride;
gfx::IntSize mCbCrSize;
int32_t mCbSkip;
int32_t mCrSkip;
// Picture region
uint32_t mPicX;
uint32_t mPicY;
gfx::IntSize mPicSize;
StereoMode mStereoMode;
gfx::IntRect GetPictureRect() const {
return gfx::IntRect(mPicX, mPicY,
mPicSize.width,
mPicSize.height);
}
PlanarYCbCrData()
: mYChannel(nullptr), mYStride(0), mYSize(0, 0), mYSkip(0)
, mCbChannel(nullptr), mCrChannel(nullptr)
, mCbCrStride(0), mCbCrSize(0, 0) , mCbSkip(0), mCrSkip(0)
, mPicX(0), mPicY(0), mPicSize(0, 0), mStereoMode(StereoMode::MONO)
{}
};
/****** Image subtypes for the different formats ******/
/**
* We assume that the image data is in the REC 470M color space (see
* Theora specification, section 4.3.1).
*
* The YCbCr format can be:
*
* 4:4:4 - CbCr width/height are the same as Y.
* 4:2:2 - CbCr width is half that of Y. Height is the same.
* 4:2:0 - CbCr width and height is half that of Y.
*
* The color format is detected based on the height/width ratios
* defined above.
*
* 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.
*
* mYSkip, mCbSkip, mCrSkip are added to support various output
* formats from hardware decoder. They are per-pixel skips in the
* source image.
*
* For example when image width is 640, mYStride is 670, mYSkip is 3,
* the mYChannel buffer looks like:
*
* |<----------------------- mYStride ----------------------------->|
* |<----------------- mYSize.width --------------->|
* 0 3 6 9 12 15 18 21 659 669
* |----------------------------------------------------------------|
* |Y___Y___Y___Y___Y___Y___Y___Y... |%%%%%%%%%|
* |Y___Y___Y___Y___Y___Y___Y___Y... |%%%%%%%%%|
* |Y___Y___Y___Y___Y___Y___Y___Y... |%%%%%%%%%|
* | |<->|
* mYSkip
*/
class PlanarYCbCrImage : public Image {
public:
typedef PlanarYCbCrData Data;
enum {
MAX_DIMENSION = 16384
};
virtual ~PlanarYCbCrImage();
/**
* This makes a copy of the data buffers, in order to support functioning
* in all different layer managers.
*/
virtual void SetData(const Data& aData);
/**
* This doesn't make a copy of the data buffers. Can be used when mBuffer is
* pre allocated with AllocateAndGetNewBuffer(size) and then SetDataNoCopy is
* called to only update the picture size, planes etc. fields in mData.
* The GStreamer media backend uses this to decode into PlanarYCbCrImage(s)
* directly.
*/
virtual void SetDataNoCopy(const Data &aData);
/**
* This allocates and returns a new buffer
*/
virtual uint8_t* AllocateAndGetNewBuffer(uint32_t aSize);
/**
* Ask this Image to not convert YUV to RGB during SetData, and make
* the original data available through GetData. This is optional,
* and not all PlanarYCbCrImages will support it.
*/
virtual void SetDelayedConversion(bool aDelayed) { }
/**
* Grab the original YUV data. This is optional.
*/
virtual const Data* GetData() { return &mData; }
/**
* Return the number of bytes of heap memory used to store this image.
*/
virtual uint32_t GetDataSize() { return mBufferSize; }
virtual bool IsValid() { return !!mBufferSize; }
virtual gfx::IntSize GetSize() { return mSize; }
explicit PlanarYCbCrImage(BufferRecycleBin *aRecycleBin);
virtual SharedPlanarYCbCrImage *AsSharedPlanarYCbCrImage() { return nullptr; }
virtual size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const {
return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
}
virtual size_t SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const;
protected:
/**
* Make a copy of the YCbCr data into local storage.
*
* @param aData Input image data.
*/
void CopyData(const Data& aData);
/**
* Return a buffer to store image data in.
* The default implementation returns memory that can
* be freed wit delete[]
*/
virtual uint8_t* AllocateBuffer(uint32_t aSize);
already_AddRefed<gfx::SourceSurface> GetAsSourceSurface();
void SetOffscreenFormat(gfxImageFormat aFormat) { mOffscreenFormat = aFormat; }
gfxImageFormat GetOffscreenFormat();
nsAutoArrayPtr<uint8_t> mBuffer;
uint32_t mBufferSize;
Data mData;
gfx::IntSize mSize;
gfxImageFormat mOffscreenFormat;
nsCountedRef<nsMainThreadSourceSurfaceRef> mSourceSurface;
nsRefPtr<BufferRecycleBin> mRecycleBin;
};
/**
* Currently, the data in a CairoImage surface is treated as being in the
* device output color space. This class is very simple as all backends
* have to know about how to deal with drawing a cairo image.
*/
class CairoImage final : public Image {
public:
struct Data {
gfx::IntSize mSize;
RefPtr<gfx::SourceSurface> mSourceSurface;
};
/**
* This can only be called on the main thread. It may add a reference
* to the surface (which will eventually be released on the main thread).
* The surface must not be modified after this call!!!
*/
void SetData(const Data& aData)
{
mSize = aData.mSize;
mSourceSurface = aData.mSourceSurface;
}
virtual already_AddRefed<gfx::SourceSurface> GetAsSourceSurface() override
{
RefPtr<gfx::SourceSurface> surface(mSourceSurface);
return surface.forget();
}
virtual TextureClient* GetTextureClient(CompositableClient* aClient) override;
virtual gfx::IntSize GetSize() override { return mSize; }
CairoImage();
~CairoImage();
gfx::IntSize mSize;
nsCountedRef<nsMainThreadSourceSurfaceRef> mSourceSurface;
nsDataHashtable<nsUint32HashKey, RefPtr<TextureClient> > mTextureClients;
};
#ifdef MOZ_WIDGET_GONK
class OverlayImage : public Image {
/**
* OverlayImage is a special Image type that does not hold any buffer.
* It only hold an Id as identifier to the real content of the Image.
* Therefore, OverlayImage must be handled by some specialized hardware(e.g. HWC)
* to show its content.
*/
public:
struct Data {
int32_t mOverlayId;
gfx::IntSize mSize;
};
OverlayImage() : Image(nullptr, ImageFormat::OVERLAY_IMAGE) { mOverlayId = INVALID_OVERLAY; }
void SetData(const Data& aData)
{
mOverlayId = aData.mOverlayId;
mSize = aData.mSize;
}
already_AddRefed<gfx::SourceSurface> GetAsSourceSurface() { return nullptr; } ;
int32_t GetOverlayId() { return mOverlayId; }
gfx::IntSize GetSize() { return mSize; }
private:
int32_t mOverlayId;
gfx::IntSize mSize;
};
#endif
} // namespace layers
} // namespace mozilla
#endif
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