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/*
* Copyright (C) 2014 The Android Open Source Project
*
* 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 EGLMANAGER_H
#define EGLMANAGER_H
#include <cutils/compiler.h>
#include <EGL/egl.h>
#include <SkRect.h>
#include <ui/GraphicBuffer.h>
#include <utils/StrongPointer.h>
namespace android {
namespace uirenderer {
namespace renderthread {
class Frame;
class RenderThread;
// This class contains the shared global EGL objects, such as EGLDisplay
// and EGLConfig, which are re-used by CanvasContext
class EglManager {
public:
static const char* eglErrorString();
// Returns true on success, false on failure
void initialize();
bool hasEglContext();
EGLSurface createSurface(EGLNativeWindowType window, bool wideColorGamut);
void destroySurface(EGLSurface surface);
void destroy();
bool isCurrent(EGLSurface surface) { return mCurrentSurface == surface; }
// Returns true if the current surface changed, false if it was already current
bool makeCurrent(EGLSurface surface, EGLint* errOut = nullptr);
Frame beginFrame(EGLSurface surface);
void damageFrame(const Frame& frame, const SkRect& dirty);
// If this returns true it is mandatory that swapBuffers is called
// if damageFrame is called without subsequent calls to damageFrame().
// See EGL_KHR_partial_update for more information
bool damageRequiresSwap();
bool swapBuffers(const Frame& frame, const SkRect& screenDirty);
// Returns true iff the surface is now preserving buffers.
bool setPreserveBuffer(EGLSurface surface, bool preserve);
void fence();
private:
friend class RenderThread;
explicit EglManager(RenderThread& thread);
// EglContext is never destroyed, method is purposely not implemented
~EglManager();
void initExtensions();
void createPBufferSurface();
void loadConfigs();
void createContext();
EGLint queryBufferAge(EGLSurface surface);
RenderThread& mRenderThread;
EGLDisplay mEglDisplay;
EGLConfig mEglConfig;
EGLConfig mEglConfigWideGamut;
EGLContext mEglContext;
EGLSurface mPBufferSurface;
EGLSurface mCurrentSurface;
enum class SwapBehavior {
Discard,
Preserved,
BufferAge,
};
SwapBehavior mSwapBehavior = SwapBehavior::Discard;
};
} /* namespace renderthread */
} /* namespace uirenderer */
} /* namespace android */
#endif /* EGLMANAGER_H */
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