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/*
* Copyright 2022 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 ANDROID_HWC_GUESTFRAMECOMPOSER_H
#define ANDROID_HWC_GUESTFRAMECOMPOSER_H
#include "AlternatingImageStorage.h"
#include "Common.h"
#include "Display.h"
#include "DrmClient.h"
#include "FrameComposer.h"
#include "Gralloc.h"
#include "Layer.h"
namespace aidl::android::hardware::graphics::composer3::impl {
class GuestFrameComposer : public FrameComposer {
public:
GuestFrameComposer() = default;
GuestFrameComposer(const GuestFrameComposer&) = delete;
GuestFrameComposer& operator=(const GuestFrameComposer&) = delete;
GuestFrameComposer(GuestFrameComposer&&) = delete;
GuestFrameComposer& operator=(GuestFrameComposer&&) = delete;
HWC3::Error init() override;
HWC3::Error registerOnHotplugCallback(const HotplugCallback& cb) override;
HWC3::Error unregisterOnHotplugCallback() override;
HWC3::Error onDisplayCreate(Display*) override;
HWC3::Error onDisplayDestroy(Display*) override;
HWC3::Error onDisplayClientTargetSet(Display*) override;
// Determines if this composer can compose the given layers on the given
// display and requests changes for layers that can't not be composed.
HWC3::Error validateDisplay(Display* display, DisplayChanges* outChanges) override;
// Performs the actual composition of layers and presents the composed result
// to the display.
HWC3::Error presentDisplay(
Display* display, ::android::base::unique_fd* outDisplayFence,
std::unordered_map<int64_t, ::android::base::unique_fd>* outLayerFences) override;
HWC3::Error onActiveConfigChange(Display* /*display*/) override;
const DrmClient* getDrmPresenter() const override { return &mDrmClient; }
private:
struct DisplayConfig {
int width;
int height;
int dpiX;
int dpiY;
int refreshRateHz;
};
HWC3::Error getDisplayConfigsFromSystemProp(std::vector<DisplayConfig>* configs);
// Returns true if the given layer's buffer has supported format.
bool canComposeLayer(Layer* layer);
// Composes the given layer into the given destination buffer.
HWC3::Error composeLayerInto(AlternatingImageStorage& storage, Layer* layer,
std::uint8_t* dstBuffer, std::uint32_t dstBufferWidth,
std::uint32_t dstBufferHeight, std::uint32_t dstBufferStrideBytes,
std::uint32_t dstBufferBytesPerPixel);
struct DisplayInfo {
// Additional per display buffer for the composition result.
buffer_handle_t compositionResultBuffer = nullptr;
std::shared_ptr<DrmBuffer> compositionResultDrmBuffer;
// Scratch storage space for intermediate images during composition.
AlternatingImageStorage compositionIntermediateStorage;
};
std::unordered_map<int64_t, DisplayInfo> mDisplayInfos;
Gralloc mGralloc;
DrmClient mDrmClient;
// Cuttlefish on QEMU does not have a display. Disable presenting to avoid
// spamming logcat with DRM commit failures.
bool mPresentDisabled = false;
HWC3::Error applyColorTransformToRGBA(const std::array<float, 16>& colorTransform, //
std::uint8_t* buffer, //
std::uint32_t bufferWidth, //
std::uint32_t bufferHeight, //
std::uint32_t bufferStrideBytes);
};
} // namespace aidl::android::hardware::graphics::composer3::impl
#endif
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