gecko/gfx/layers/opengl/ImageLayerOGL.h
2010-05-24 23:35:35 -07:00

230 lines
6.8 KiB
C++

/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla Corporation code.
*
* The Initial Developer of the Original Code is Mozilla Foundation.
* Portions created by the Initial Developer are Copyright (C) 2009
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Bas Schouten <bschouten@mozilla.org>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef GFX_IMAGELAYEROGL_H
#define GFX_IMAGELAYEROGL_H
#include "LayerManagerOGL.h"
#include "ImageLayers.h"
#include "mozilla/Mutex.h"
namespace mozilla {
namespace layers {
/**
* This class wraps a GL texture. It includes a GLContext reference
* so we can use to free the texture when destroyed. The implementation
* makes sure to always free the texture on the main thread, even if the
* destructor runs on another thread.
*
* We ensure that the GLContext reference is only addrefed and released
* on the main thread, although it uses threadsafe recounting so we don't
* really have to.
*
* Initially the texture is not allocated --- it's in a "null" state.
*/
class GLTexture {
typedef mozilla::gl::GLContext GLContext;
public:
GLTexture() : mTexture(0) {}
~GLTexture() { Release(); }
/**
* Allocate the texture. This can only be called on the main thread.
*/
void Allocate(GLContext *aContext);
/**
* Move the state of aOther to this GLTexture. If this GLTexture currently
* has a texture, it is released. This can be called on any thread.
*/
void TakeFrom(GLTexture *aOther);
PRBool IsAllocated() { return mTexture != 0; }
GLuint GetTextureID() { return mTexture; }
GLContext *GetGLContext() { return mContext; }
private:
void Release();
nsRefPtr<GLContext> mContext;
GLuint mTexture;
};
/**
* A RecycleBin is owned by an ImageContainerOGL. We store buffers
* and textures in it that we want to recycle from one image to the next.
* It's a separate object from ImageContainerOGL because images need to store
* a strong ref to their RecycleBin and we must avoid creating a
* reference loop between an ImageContainerOGL and its active image.
*/
class RecycleBin {
THEBES_INLINE_DECL_THREADSAFE_REFCOUNTING(RecycleBin)
typedef mozilla::gl::GLContext GLContext;
public:
RecycleBin();
void RecycleBuffer(PRUint8* aBuffer, PRUint32 aSize);
// Returns a recycled buffer of the right size, or allocates a new buffer.
PRUint8* TakeBuffer(PRUint32 aSize);
enum TextureType {
TEXTURE_Y,
TEXTURE_C
};
void RecycleTexture(GLTexture *aTexture, TextureType aType,
const gfxIntSize& aSize);
void TakeTexture(TextureType aType, const gfxIntSize& aSize,
GLContext *aContext, GLTexture *aOutTexture);
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<PRUint8> > mRecycledBuffers;
// This is only valid if mRecycledBuffers is non-empty
PRUint32 mRecycledBufferSize;
nsTArray<GLTexture> mRecycledTextures[2];
gfxIntSize mRecycledTextureSizes[2];
};
class THEBES_API ImageContainerOGL : public ImageContainer
{
public:
ImageContainerOGL(LayerManagerOGL *aManager);
virtual ~ImageContainerOGL() {}
virtual already_AddRefed<Image> CreateImage(const Image::Format* aFormats,
PRUint32 aNumFormats);
virtual void SetCurrentImage(Image* aImage);
virtual already_AddRefed<Image> GetCurrentImage();
virtual already_AddRefed<gfxASurface> GetCurrentAsSurface(gfxIntSize* aSize);
virtual gfxIntSize GetCurrentSize();
private:
typedef mozilla::Mutex Mutex;
nsRefPtr<RecycleBin> mRecycleBin;
// This protects mActiveImage
Mutex mActiveImageLock;
nsRefPtr<Image> mActiveImage;
};
class THEBES_API ImageLayerOGL : public ImageLayer,
public LayerOGL
{
public:
ImageLayerOGL(LayerManagerOGL *aManager)
: ImageLayer(aManager, NULL)
, LayerOGL(aManager)
{
mImplData = static_cast<LayerOGL*>(this);
}
// LayerOGL Implementation
virtual LayerType GetType();
virtual Layer* GetLayer();
virtual void RenderLayer(int aPreviousFrameBuffer,
const nsIntPoint& aOffset);
};
class THEBES_API PlanarYCbCrImageOGL : public PlanarYCbCrImage
{
typedef mozilla::gl::GLContext GLContext;
public:
PlanarYCbCrImageOGL(RecycleBin *aRecycleBin);
~PlanarYCbCrImageOGL();
virtual void SetData(const Data &aData);
/**
* Upload the data from out mData into our textures. For now we use this to
* make sure the textures are created and filled on the main thread.
*/
void AllocateTextures(LayerManagerOGL *aManager);
PRBool HasData() { return mHasData; }
PRBool HasTextures()
{
return mTextures[0].IsAllocated() && mTextures[1].IsAllocated() &&
mTextures[2].IsAllocated();
}
nsAutoArrayPtr<PRUint8> mBuffer;
PRUint32 mBufferSize;
nsRefPtr<RecycleBin> mRecycleBin;
GLTexture mTextures[3];
Data mData;
gfxIntSize mSize;
PRPackedBool mHasData;
};
class THEBES_API CairoImageOGL : public CairoImage
{
typedef mozilla::gl::GLContext GLContext;
public:
CairoImageOGL(LayerManagerOGL *aManager);
void SetData(const Data &aData);
GLTexture mTexture;
gfxIntSize mSize;
};
} /* layers */
} /* mozilla */
#endif /* GFX_IMAGELAYEROGL_H */