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gecko/gfx/layers/ImageContainer.h
Phil Ringnalda 71b27f8c88 Backed out 3 changesets (bug 972703, bug 889959) for build failures and crashes 
CLOSED TREE

Backed out changeset ef3d90780478 (bug 972703)
Backed out changeset 34c95e937671 (bug 889959)
Backed out changeset 5e25912d6696 (bug 889959)
2014-02-16 15:17:01 -08:00

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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 "ImageTypes.h" // for ImageFormat, etc
#include "gfxASurface.h" // for gfxASurface, 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 nsIntRect
#include "nsSize.h" // for nsIntSize
#include "nsTArray.h" // for nsTArray
#include "mozilla/Atomics.h"
#include "nsThreadUtils.h"
#include "mozilla/gfx/2D.h"
#include "nsDataHashtable.h"
#ifndef XPCOM_GLUE_AVOID_NSPR
/**
* We need to be able to hold a reference to a gfxASurface 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 gfxASurface off the main thread, but we might want to Release due
* to an Image being destroyed off the main thread.
*
* We use nsCountedRef<nsMainThreadSurfaceRef> to reference the
* gfxASurface. 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.
*
* This should be removed after after Image::DeprecatedGetAsSurface is
* removed. It is replaced by nsMainThreadSourceSurfaceRef
*/
class nsMainThreadSurfaceRef;
template <>
class nsAutoRefTraits<nsMainThreadSurfaceRef> {
public:
typedef gfxASurface* RawRef;
/**
* The XPCOM event that will do the actual release on the main thread.
*/
class SurfaceReleaser : public nsRunnable {
public:
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();
}
};
/**
* Same purpose as nsMainThreadSurfaceRef byt holds a gfx::SourceSurface instead.
* The specialization of nsMainThreadSurfaceRef should be removed after
* Image::DeprecatedGetAsSurface is removed
*/
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:
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 {
class CrossProcessMutex;
namespace layers {
class ImageClient;
class SharedPlanarYCbCrImage;
class DeprecatedSharedPlanarYCbCrImage;
class TextureClient;
class CompositableClient;
class CompositableForwarder;
class SurfaceDescriptor;
struct ImageBackendData
{
virtual ~ImageBackendData() {}
protected:
ImageBackendData() {}
};
// sadly we'll need this until we get rid of Deprected image classes
class ISharedImage {
public:
virtual uint8_t* GetBuffer() = 0;
/**
* For use with the CompositableClient only (so that the later can
* synchronize the TextureClient with the TextureHost).
*/
virtual TextureClient* GetTextureClient(CompositableClient* aClient) = 0;
};
/**
* 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:
virtual ~Image() {}
virtual ISharedImage* AsSharedImage() { return nullptr; }
ImageFormat GetFormat() { return mFormat; }
void* GetImplData() { return mImplData; }
virtual already_AddRefed<gfxASurface> DeprecatedGetAsSurface() = 0;
virtual gfx::IntSize GetSize() = 0;
virtual nsIntRect GetPictureRect()
{
return nsIntRect(0, 0, GetSize().width, GetSize().height);
}
ImageBackendData* GetBackendData(LayersBackend aBackend)
{ return mBackendData[size_t(aBackend)]; }
void SetBackendData(LayersBackend aBackend, ImageBackendData* aData)
{ mBackendData[size_t(aBackend)] = aData; }
int32_t GetSerial() { return mSerial; }
void MarkSent() { mSent = true; }
bool IsSentToCompositor() { return mSent; }
virtual TemporaryRef<gfx::SourceSurface> GetAsSourceSurface();
protected:
Image(void* aImplData, ImageFormat aFormat) :
mImplData(aImplData),
mSerial(++sSerialCounter),
mFormat(aFormat),
mSent(false)
{}
nsAutoPtr<ImageBackendData> mBackendData[size_t(mozilla::layers::LayersBackend::LAYERS_LAST)];
void* mImplData;
int32_t mSerial;
ImageFormat mFormat;
static mozilla::Atomic<int32_t> sSerialCounter;
bool mSent;
};
/**
* 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 {
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(RecycleBin)
//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;
// 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;
};
class CompositionNotifySink
{
public:
virtual void DidComposite() = 0;
virtual ~CompositionNotifySink() {}
};
/**
* 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);
};
/**
* This struct is used to store RemoteImages, it is meant to be able to live in
* shared memory. Therefor it should not contain a vtable pointer. Remote
* users can manipulate the data in this structure to specify what image is to
* be drawn by the container. When accessing this data users should make sure
* the mutex synchronizing access to the structure is held!
*/
struct RemoteImageData {
enum Type {
/**
* This is a format that uses raw bitmap data.
*/
RAW_BITMAP,
/**
* This is a format that uses a pointer to a texture do draw directly
* from a shared texture. Any process may have created this texture handle,
* the process creating the texture handle is responsible for managing it's
* lifetime by managing the lifetime of the first D3D texture object this
* handle was created for. It must also ensure the handle is not set
* current anywhere when the last reference to this object is released.
*/
DXGI_TEXTURE_HANDLE
};
/* These formats describe the format in the memory byte-order */
enum Format {
/* 8 bits per channel */
BGRA32,
/* 8 bits per channel, alpha channel is ignored */
BGRX32
};
// This should be set to true if a change was made so that the ImageContainer
// knows to throw out any cached RemoteImage objects.
bool mWasUpdated;
Type mType;
Format mFormat;
gfx::IntSize mSize;
union {
struct {
/* This pointer is set by a remote process, however it will be set to
* the container process' address the memory of the raw bitmap resides
* at.
*/
unsigned char *mData;
int mStride;
} mBitmap;
#ifdef XP_WIN
HANDLE mTextureHandle;
#endif
};
};
/**
* 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 three modes:
* 1) Normal. Triggered by constructing the ImageContainer with
* DISABLE_ASYNC or when compositing is happening on the main thread.
* SetCurrentImage 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.
* SetCurrentImage sends a message through the ImageBridge to the compositor
* thread to update the image, without going through the main thread or
* a layer transaction.
* 3) Remote. Initiated by calling SetRemoteImageData on the ImageContainer
* before any other activity.
* 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 {
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(ImageContainer)
public:
enum { DISABLE_ASYNC = 0x0, ENABLE_ASYNC = 0x01 };
ImageContainer(int flag = 0);
~ImageContainer();
/**
* 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.
*/
already_AddRefed<Image> CreateImage(ImageFormat aFormat);
/**
* Set an Image as the current image to display. The Image must have
* been created by this ImageContainer.
* Can be called on any thread. 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 has not been set.
*
* Implementations must call CurrentImageChanged() while holding
* mReentrantMonitor.
*
* If this ImageContainer has an ImageClient for async video:
* Schelude a task to send the image to the compositor using the
* PImageBridge protcol without using the main thread.
*/
void SetCurrentImage(Image* aImage);
/**
* Clear all images. Let ImageClient release all TextureClients.
*/
void ClearAllImages();
/**
* Clear all images except current one.
* Let ImageClient release all TextureClients except front one.
*/
void ClearAllImagesExceptFront();
/**
* Clear the current image.
* This function is expect to be called only from a CompositableClient
* that belongs to ImageBridgeChild. Created to prevent dead lock.
* See Bug 901224.
*/
void ClearCurrentImage();
/**
* 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.
*
* Implementations must call CurrentImageChanged() while holding
* mReentrantMonitor.
*/
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();
/**
* Lock the current Image.
* This has to add a reference since otherwise there are race conditions
* where the current image is destroyed before the caller can add
* a reference. This lock strictly guarantees the underlying image remains
* valid, it does not mean the current image cannot change.
* Can be called on any thread. This method will lock the cross-process
* mutex to ensure remote processes cannot alter underlying data. This call
* -must- be balanced by a call to UnlockCurrentImage and users should avoid
* holding the image locked for a long time.
*/
already_AddRefed<Image> LockCurrentImage();
/**
* This call unlocks the image. For remote images releasing the cross-process
* mutex.
*/
void UnlockCurrentImage();
/**
* Get the current image as a gfxASurface. This is useful for fallback
* rendering.
* This can only be called from the main thread, since cairo objects
* can only be used from the main thread.
* This is defined here and not on Image because it's possible (likely)
* that some backends will make an Image "ready to draw" only when it
* becomes the current image for an image container.
* Returns null if there is no current image.
* Returns the size in aSize.
* The returned surface will never be modified. The caller must not
* modify it.
* Can be called on any thread. This method takes mReentrantMonitor
* when accessing thread-shared state.
* If the current image is a remote image, that is, if it is an image that
* may be shared accross processes, calling this function will make
* a copy of the image data while holding the mRemoteDataMutex. If possible,
* the lock methods should be used to avoid the copy, however this should be
* avoided if the surface is required for a long period of time.
*/
already_AddRefed<gfxASurface> DeprecatedGetCurrentAsSurface(gfx::IntSize* aSizeResult);
/**
* This is similar to GetCurrentAsSurface, however this does not make a copy
* of the image data and requires the user to call UnlockCurrentImage when
* done with the image data. Once UnlockCurrentImage has been called the
* surface returned by this function is no longer valid! This works for any
* type of image. Optionally a pointer can be passed to receive the current
* image.
*/
already_AddRefed<gfxASurface> DeprecatedLockCurrentAsSurface(gfx::IntSize* aSizeResult,
Image** aCurrentImage = nullptr);
/**
* Same as GetCurrentAsSurface but for Moz2D
*/
TemporaryRef<gfx::SourceSurface> GetCurrentAsSourceSurface(gfx::IntSize* aSizeResult);
/**
* Same as LockCurrentAsSurface but for Moz2D
*/
TemporaryRef<gfx::SourceSurface> LockCurrentAsSourceSurface(gfx::IntSize* aSizeResult,
Image** aCurrentImage = 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();
}
/**
* Returns the time at which the currently contained image was first
* painted. This is reset every time a new image is set as the current
* image. Note this may return a null timestamp if the current image
* has not yet been painted. Can be called from any thread.
*/
TimeStamp GetPaintTime() {
ReentrantMonitorAutoEnter mon(mReentrantMonitor);
return mPaintTime;
}
/**
* 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;
}
/**
* Resets the paint count to zero.
* Can be called from any thread.
*/
void ResetPaintCount() {
ReentrantMonitorAutoEnter mon(mReentrantMonitor);
mPaintCount = 0;
}
/**
* Increments mPaintCount if this is the first time aPainted has been
* painted, and sets mPaintTime if the painted image is the current image.
* current image. Can be called from any thread.
*/
void NotifyPaintedImage(Image* aPainted) {
ReentrantMonitorAutoEnter mon(mReentrantMonitor);
nsRefPtr<Image> current = mActiveImage;
if (aPainted == current) {
if (mPaintTime.IsNull()) {
mPaintTime = TimeStamp::Now();
mPaintCount++;
}
} else if (!mPreviousImagePainted) {
// While we were painting this image, the current image changed. We
// still must count it as painted, but can't set mPaintTime, since we're
// no longer the current image.
mPaintCount++;
mPreviousImagePainted = true;
}
if (mCompositionNotifySink) {
mCompositionNotifySink->DidComposite();
}
}
void SetCompositionNotifySink(CompositionNotifySink *aSink) {
mCompositionNotifySink = aSink;
}
/**
* This function is called to tell the ImageContainer where the
* (cross-process) segment lives where the shared data about possible
* remote images are stored. In addition to this a CrossProcessMutex object
* is passed telling the container how to synchronize access to this data.
* NOTE: This should be called during setup of the container and not after
* usage has started.
*/
void SetRemoteImageData(RemoteImageData *aRemoteData,
CrossProcessMutex *aRemoteDataMutex);
/**
* This can be used to check if the container has RemoteData set.
*/
RemoteImageData *GetRemoteImageData() { return mRemoteData; }
protected:
typedef mozilla::ReentrantMonitor ReentrantMonitor;
void SetCurrentImageInternal(Image* aImage);
// 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();
// ReentrantMonitor to protect thread safe access to the "current
// image", and any other state which is shared between threads.
ReentrantMonitor mReentrantMonitor;
// Performs necessary housekeeping to ensure the painted frame statistics
// are accurate. Must be called by SetCurrentImage() implementations with
// mReentrantMonitor held.
void CurrentImageChanged() {
mReentrantMonitor.AssertCurrentThreadIn();
mPreviousImagePainted = !mPaintTime.IsNull();
mPaintTime = TimeStamp();
}
nsRefPtr<Image> mActiveImage;
// 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;
// Time stamp at which the current image was first painted. It's up to the
// ImageContainer implementation to ensure accesses to this are threadsafe.
TimeStamp mPaintTime;
// Denotes whether the previous image was painted.
bool mPreviousImagePainted;
// 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 contains the remote image data for this container, if this is nullptr
// that means the container has no other process that may control its active
// image.
RemoteImageData *mRemoteData;
// This cross-process mutex is used to synchronise access to mRemoteData.
// When this mutex is held, we will always be inside the mReentrantMonitor
// however the same is not true vice versa.
CrossProcessMutex *mRemoteDataMutex;
CompositionNotifySink *mCompositionNotifySink;
// 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;
};
class AutoLockImage
{
public:
AutoLockImage(ImageContainer *aContainer) : mContainer(aContainer) { mImage = mContainer->LockCurrentImage(); }
AutoLockImage(ImageContainer *aContainer, RefPtr<gfx::SourceSurface> *aSurface) : mContainer(aContainer) {
*aSurface = mContainer->LockCurrentAsSourceSurface(&mSize, getter_AddRefs(mImage));
}
~AutoLockImage() { if (mContainer) { mContainer->UnlockCurrentImage(); } }
Image* GetImage() { return mImage; }
const gfx::IntSize &GetSize() { return mSize; }
void Unlock() {
if (mContainer) {
mImage = nullptr;
mContainer->UnlockCurrentImage();
mContainer = nullptr;
}
}
/** Things get a little tricky here, because our underlying image can -still-
* change, and OS X requires a complicated callback mechanism to update this
* we need to support staying the lock and getting the new image in a proper
* way. This method makes any images retrieved with GetImage invalid!
*/
void Refresh() {
if (mContainer) {
mContainer->UnlockCurrentImage();
mImage = mContainer->LockCurrentImage();
}
}
private:
ImageContainer *mContainer;
nsRefPtr<Image> mImage;
gfx::IntSize mSize;
};
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;
nsIntRect GetPictureRect() const {
return nsIntRect(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; }
PlanarYCbCrImage(BufferRecycleBin *aRecycleBin);
virtual SharedPlanarYCbCrImage *AsSharedPlanarYCbCrImage() { return nullptr; }
virtual DeprecatedSharedPlanarYCbCrImage *AsDeprecatedSharedPlanarYCbCrImage() { return nullptr; }
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<gfxASurface> DeprecatedGetAsSurface();
TemporaryRef<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<nsMainThreadSurfaceRef> mDeprecatedSurface;
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 : public Image,
public ISharedImage {
public:
struct Data {
gfxASurface* mDeprecatedSurface;
gfx::IntSize mSize;
// mSourceSurface wraps mDeprrecatedSurface's data, therefore it should not
// outlive mDeprecatedSurface
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)
{
mDeprecatedSurface = aData.mDeprecatedSurface;
mSize = aData.mSize;
mSourceSurface = aData.mSourceSurface;
}
virtual TemporaryRef<gfx::SourceSurface> GetAsSourceSurface()
{
return mSourceSurface.get();
}
virtual already_AddRefed<gfxASurface> DeprecatedGetAsSurface()
{
nsRefPtr<gfxASurface> surface = mDeprecatedSurface.get();
return surface.forget();
}
virtual ISharedImage* AsSharedImage() { return this; }
virtual uint8_t* GetBuffer() { return nullptr; }
virtual TextureClient* GetTextureClient(CompositableClient* aClient);
gfx::IntSize GetSize() { return mSize; }
CairoImage();
~CairoImage();
nsCountedRef<nsMainThreadSurfaceRef> mDeprecatedSurface;
gfx::IntSize mSize;
// mSourceSurface wraps mDeprrecatedSurface's data, therefore it should not
// outlive mDeprecatedSurface
nsCountedRef<nsMainThreadSourceSurfaceRef> mSourceSurface;
nsDataHashtable<nsUint32HashKey, RefPtr<TextureClient> > mTextureClients;
};
class RemoteBitmapImage : public Image {
public:
RemoteBitmapImage() : Image(nullptr, ImageFormat::REMOTE_IMAGE_BITMAP) {}
already_AddRefed<gfxASurface> DeprecatedGetAsSurface();
TemporaryRef<gfx::SourceSurface> GetAsSourceSurface();
gfx::IntSize GetSize() { return mSize; }
unsigned char *mData;
int mStride;
gfx::IntSize mSize;
RemoteImageData::Format mFormat;
};
} //namespace
} //namespace
#endif
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