зеркало из https://github.com/mozilla/pjs.git
171 строка
5.8 KiB
C++
171 строка
5.8 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):
|
|
* Robert O'Callahan <robert@ocallahan.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_BASICLAYERS_H
|
|
#define GFX_BASICLAYERS_H
|
|
|
|
#include "Layers.h"
|
|
|
|
#include "gfxContext.h"
|
|
#include "nsAutoRef.h"
|
|
#include "nsThreadUtils.h"
|
|
|
|
namespace mozilla {
|
|
namespace layers {
|
|
|
|
class BasicThebesLayer;
|
|
|
|
/**
|
|
* This is a cairo/Thebes-only, main-thread-only implementation of layers.
|
|
* Currently it only supports immediate mode but we will probably
|
|
* extend it to support retained buffers. In other words, currently,
|
|
* no buffers are retained between transactions.
|
|
*
|
|
* In each transaction, the client sets up the layer tree and then during
|
|
* the drawing phase, each ThebesLayer is painted directly into the target
|
|
* context (with appropriate clipping and Push/PopGroups performed
|
|
* between layers).
|
|
*/
|
|
class THEBES_API BasicLayerManager : public LayerManager {
|
|
public:
|
|
/**
|
|
* Construct a BasicLayerManager which will render to aContext when
|
|
* BeginTransaction is called. This can be null, in which case
|
|
* transactions started with BeginTransaction will not do any painting.
|
|
*/
|
|
BasicLayerManager(gfxContext* aContext);
|
|
virtual ~BasicLayerManager();
|
|
|
|
/**
|
|
* Set the default target context that will be used when BeginTransaction
|
|
* is called. This can only be called outside a transaction.
|
|
*/
|
|
void SetDefaultTarget(gfxContext* aContext);
|
|
|
|
virtual void BeginTransaction();
|
|
virtual void BeginTransactionWithTarget(gfxContext* aTarget);
|
|
virtual void EndTransaction(DrawThebesLayerCallback aCallback,
|
|
void* aCallbackData);
|
|
|
|
virtual void SetRoot(Layer* aLayer);
|
|
|
|
virtual already_AddRefed<ThebesLayer> CreateThebesLayer();
|
|
virtual already_AddRefed<ContainerLayer> CreateContainerLayer();
|
|
virtual already_AddRefed<ImageLayer> CreateImageLayer();
|
|
virtual already_AddRefed<CanvasLayer> CreateCanvasLayer();
|
|
virtual already_AddRefed<ImageContainer> CreateImageContainer();
|
|
virtual already_AddRefed<ColorLayer> CreateColorLayer();
|
|
virtual LayersBackend GetBackendType() { return LAYERS_BASIC; }
|
|
|
|
#ifdef DEBUG
|
|
PRBool InConstruction() { return mPhase == PHASE_CONSTRUCTION; }
|
|
PRBool InDrawing() { return mPhase == PHASE_DRAWING; }
|
|
#endif
|
|
gfxContext* GetTarget() { return mTarget; }
|
|
|
|
private:
|
|
// Paints aLayer to mTarget.
|
|
void PaintLayer(Layer* aLayer,
|
|
DrawThebesLayerCallback aCallback,
|
|
void* aCallbackData);
|
|
|
|
// The default context for BeginTransaction.
|
|
nsRefPtr<gfxContext> mDefaultTarget;
|
|
// The context to draw into.
|
|
nsRefPtr<gfxContext> mTarget;
|
|
|
|
#ifdef DEBUG
|
|
enum TransactionPhase { PHASE_NONE, PHASE_CONSTRUCTION, PHASE_DRAWING };
|
|
TransactionPhase mPhase;
|
|
#endif
|
|
};
|
|
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 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.
|
|
*/
|
|
class nsMainThreadSurfaceRef;
|
|
|
|
NS_SPECIALIZE_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 nsnull; }
|
|
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 /* GFX_BASICLAYERS_H */
|