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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* vim:set ts=4 sw=4 sts=4 et: */
/*
* Copyright (c) 2012, The Linux Foundation. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef mozilla_HwcComposer2D
#define mozilla_HwcComposer2D
#include "Composer2D.h"
#include "hwchal/HwcHALBase.h" // for HwcHAL
#include "HwcUtils.h" // for RectVector
#include "Layers.h"
#include "mozilla/Mutex.h"
#include "mozilla/layers/FenceUtils.h" // for FenceHandle
#include "mozilla/UniquePtr.h" // for HwcHAL
#include <vector>
#include <list>
#include <utils/Timers.h>
class nsScreenGonk;
namespace mozilla {
namespace gl {
class GLContext;
}
namespace layers {
class CompositorBridgeParent;
class Layer;
}
/*
* HwcComposer2D provides a way for gecko to render frames
* using hwcomposer.h in the AOSP HAL.
*
* hwcomposer.h defines an interface for display composition
* using dedicated hardware. This hardware is usually faster
* or more power efficient than the GPU. However, in exchange
* for better performance, generality has to be sacrificed:
* no 3d transforms, no intermediate surfaces, no special shader effects,
* and loss of other goodies depending on the platform.
*
* In general, when hwc is enabled gecko tries to compose
* its frames using HwcComposer2D first. Then if HwcComposer2D is
* unable to compose a frame then it falls back to compose it
* using the GPU with OpenGL.
*
*/
class HwcComposer2D : public mozilla::layers::Composer2D {
public:
HwcComposer2D();
virtual ~HwcComposer2D();
static HwcComposer2D* GetInstance();
// Returns TRUE if the container has been succesfully rendered
// Returns FALSE if the container cannot be fully rendered
// by this composer so nothing was rendered at all
virtual bool TryRenderWithHwc(layers::Layer* aRoot,
nsIWidget* aWidget,
bool aGeometryChanged,
bool aHasImageHostOverlays) override;
virtual bool Render(nsIWidget* aWidget) override;
virtual bool HasHwc() override { return mHal->HasHwc(); }
bool EnableVsync(bool aEnable);
bool RegisterHwcEventCallback();
void Vsync(int aDisplay, int64_t aTimestamp);
void Invalidate();
void Hotplug(int aDisplay, int aConnected);
void SetCompositorBridgeParent(layers::CompositorBridgeParent* aCompositorBridgeParent);
private:
void Reset();
void Prepare(buffer_handle_t dispHandle, int fence, nsScreenGonk* screen);
bool Commit(nsScreenGonk* aScreen);
bool TryHwComposition(nsScreenGonk* aScreen);
bool ReallocLayerList();
bool PrepareLayerList(layers::Layer* aContainer, const nsIntRect& aClip,
const gfx::Matrix& aParentTransform,
bool aFindSidebandStreams);
void SendtoLayerScope();
UniquePtr<HwcHALBase> mHal;
HwcList* mList;
nsIntRect mScreenRect;
int mMaxLayerCount;
bool mColorFill;
bool mRBSwapSupport;
//Holds all the dynamically allocated RectVectors needed
//to render the current frame
std::list<HwcUtils::RectVector> mVisibleRegions;
layers::FenceHandle mPrevRetireFence;
layers::FenceHandle mPrevDisplayFence;
nsTArray<HwcLayer> mCachedSidebandLayers;
nsTArray<layers::LayerComposite*> mHwcLayerMap;
bool mPrepared;
bool mHasHWVsync;
layers::CompositorBridgeParent* mCompositorBridgeParent;
Mutex mLock;
};
} // namespace mozilla
#endif // mozilla_HwcComposer2D
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