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* Copyright (C) 2010 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
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* See the License for the specific language governing permissions and
* limitations under the License.
#ifndef USE_HWC2
#include "HWComposer_hwc1.h"
#include "HWC2.h"
#include <stdint.h>
#include <sys/types.h>
#include <ui/Fence.h>
#include <utils/BitSet.h>
#include <utils/Condition.h>
#include <utils/Mutex.h>
#include <utils/StrongPointer.h>
#include <utils/Thread.h>
#include <utils/Timers.h>
#include <utils/Vector.h>
#include <memory>
#include <set>
#include <vector>
extern "C" int clock_nanosleep(clockid_t clock_id, int flags,
const struct timespec *request,
struct timespec *remain);
struct framebuffer_device_t;
namespace HWC2 {
class Device;
class Display;
namespace android {
// ---------------------------------------------------------------------------
class DisplayDevice;
class Fence;
class FloatRect;
class GraphicBuffer;
class NativeHandle;
class Region;
class String8;
class HWComposer
// Uses the named composer service. Valid choices for normal use
// are 'default' and 'vr'.
HWComposer(const std::string& serviceName);
void registerCallback(HWC2::ComposerCallback* callback,
int32_t sequenceId);
bool hasCapability(HWC2::Capability capability) const;
// Attempts to allocate a virtual display. If the virtual display is created
// on the HWC device, outId will contain its HWC ID.
status_t allocateVirtualDisplay(uint32_t width, uint32_t height,
android_pixel_format_t* format, int32_t* outId);
// Attempts to create a new layer on this display
HWC2::Layer* createLayer(int32_t displayId);
// Destroy a previously created layer
void destroyLayer(int32_t displayId, HWC2::Layer* layer);
// Asks the HAL what it can do
status_t prepare(DisplayDevice& displayDevice);
status_t setClientTarget(int32_t displayId, uint32_t slot,
const sp<Fence>& acquireFence,
const sp<GraphicBuffer>& target, android_dataspace_t dataspace);
// Present layers to the display and read releaseFences.
status_t presentAndGetReleaseFences(int32_t displayId);
// set power mode
status_t setPowerMode(int32_t displayId, int mode);
// set active config
status_t setActiveConfig(int32_t displayId, size_t configId);
// Sets a color transform to be applied to the result of composition
status_t setColorTransform(int32_t displayId, const mat4& transform);
// reset state when an external, non-virtual display is disconnected
void disconnectDisplay(int32_t displayId);
// does this display have layers handled by HWC
bool hasDeviceComposition(int32_t displayId) const;
// does this display have layers handled by GLES
bool hasClientComposition(int32_t displayId) const;
// get the present fence received from the last call to present.
sp<Fence> getPresentFence(int32_t displayId) const;
// Get last release fence for the given layer
sp<Fence> getLayerReleaseFence(int32_t displayId,
HWC2::Layer* layer) const;
// Set the output buffer and acquire fence for a virtual display.
// Returns INVALID_OPERATION if displayId is not a virtual display.
status_t setOutputBuffer(int32_t displayId, const sp<Fence>& acquireFence,
const sp<GraphicBuffer>& buf);
// After SurfaceFlinger has retrieved the release fences for all the frames,
// it can call this to clear the shared pointers in the release fence map
void clearReleaseFences(int32_t displayId);
// Returns the HDR capabilities of the given display
std::unique_ptr<HdrCapabilities> getHdrCapabilities(int32_t displayId);
// Events handling ---------------------------------------------------------
// Returns true if successful, false otherwise. The
// DisplayDevice::DisplayType of the display is returned as an output param.
bool onVsync(hwc2_display_t displayId, int64_t timestamp,
int32_t* outDisplay);
void onHotplug(hwc2_display_t displayId, HWC2::Connection connection);
void setVsyncEnabled(int32_t displayId, HWC2::Vsync enabled);
// Query display parameters. Pass in a display index (e.g.
nsecs_t getRefreshTimestamp(int32_t displayId) const;
bool isConnected(int32_t displayId) const;
// Non-const because it can update configMap inside of mDisplayData
std::vector<std::shared_ptr<const HWC2::Display::Config>>
getConfigs(int32_t displayId) const;
std::shared_ptr<const HWC2::Display::Config>
getActiveConfig(int32_t displayId) const;
std::vector<android_color_mode_t> getColorModes(int32_t displayId) const;
status_t setActiveColorMode(int32_t displayId, android_color_mode_t mode);
bool isUsingVrComposer() const;
// for debugging ----------------------------------------------------------
void dump(String8& out) const;
android::Hwc2::Composer* getComposer() const { return mHwcDevice->getComposer(); }
static const int32_t VIRTUAL_DISPLAY_ID_BASE = 2;
bool isValidDisplay(int32_t displayId) const;
static void validateChange(HWC2::Composition from, HWC2::Composition to);
struct cb_context;
struct DisplayData {
void reset();
bool hasClientComposition;
bool hasDeviceComposition;
HWC2::Display* hwcDisplay;
HWC2::DisplayRequest displayRequests;
sp<Fence> lastPresentFence; // signals when the last set op retires
std::unordered_map<HWC2::Layer*, sp<Fence>> releaseFences;
buffer_handle_t outbufHandle;
sp<Fence> outbufAcquireFence;
mutable std::unordered_map<int32_t,
std::shared_ptr<const HWC2::Display::Config>> configMap;
// protected by mVsyncLock
HWC2::Vsync vsyncEnabled;
bool validateWasSkipped;
HWC2::Error presentError;
std::unique_ptr<HWC2::Device> mHwcDevice;
std::vector<DisplayData> mDisplayData;
std::set<size_t> mFreeDisplaySlots;
std::unordered_map<hwc2_display_t, int32_t> mHwcDisplaySlots;
// protect mDisplayData from races between prepare and dump
mutable Mutex mDisplayLock;
cb_context* mCBContext;
uint32_t mRemainingHwcVirtualDisplays;
// protected by mLock
mutable Mutex mLock;
mutable std::unordered_map<int32_t, nsecs_t> mLastHwVSync;
// thread-safe
mutable Mutex mVsyncLock;
// ---------------------------------------------------------------------------
}; // namespace android
#endif // #ifdef USE_HWC2