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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 <EGL/egl.h>
#include <EGL/eglext.h>
#include <SkImageInfo.h>
#include <SkRect.h>
#include <cutils/compiler.h>
#include <utils/StrongPointer.h>
#include "IRenderPipeline.h"
#include "utils/Result.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:
explicit EglManager();
~EglManager();
static const char* eglErrorString();
void initialize();
bool hasEglContext();
Result<EGLSurface, EGLint> createSurface(EGLNativeWindowType window, ColorMode colorMode,
sk_sp<SkColorSpace> colorSpace);
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, bool force = false);
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();
EGLDisplay eglDisplay() const { return mEglDisplay; }
// Inserts a wait on fence command into the OpenGL ES command stream. If EGL extension
// support is missing, block the CPU on the fence.
status_t fenceWait(int fence);
// Creates a fence that is signaled, when all the pending GL commands are flushed.
// Depending on installed extensions, the result is either Android native fence or EGL fence.
status_t createReleaseFence(bool useFenceSync, EGLSyncKHR* eglFence, int* nativeFence);
private:
enum class SwapBehavior {
Discard,
Preserved,
BufferAge,
};
static EGLConfig load8BitsConfig(EGLDisplay display, SwapBehavior swapBehavior);
static EGLConfig loadFP16Config(EGLDisplay display, SwapBehavior swapBehavior);
static EGLConfig load1010102Config(EGLDisplay display, SwapBehavior swapBehavior);
static EGLConfig loadA8Config(EGLDisplay display, SwapBehavior swapBehavior);
void initExtensions();
void createPBufferSurface();
void loadConfigs();
void createContext();
EGLint queryBufferAge(EGLSurface surface);
EGLDisplay mEglDisplay;
EGLConfig mEglConfig;
EGLConfig mEglConfigF16;
EGLConfig mEglConfig1010102;
EGLConfig mEglConfigA8;
EGLContext mEglContext;
EGLSurface mPBufferSurface;
EGLSurface mCurrentSurface;
bool mHasWideColorGamutSupport;
SwapBehavior mSwapBehavior = SwapBehavior::Discard;
};
} /* namespace renderthread */
} /* namespace uirenderer */
} /* namespace android */
#endif /* EGLMANAGER_H */
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