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/*
* Copyright (C) 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_HWC2_DEVICE_HWC_LAYER_H
#define ANDROID_HWC2_DEVICE_HWC_LAYER_H
#include <hardware/hwcomposer2.h>
#include "bufferinfo/BufferInfoGetter.h"
#include "compositor/LayerData.h"
namespace android {
class HwcDisplay;
class HwcLayer {
public:
explicit HwcLayer(HwcDisplay *parent_display) : parent_(parent_display){};
HWC2::Composition GetSfType() const {
return sf_type_;
}
HWC2::Composition GetValidatedType() const {
return validated_type_;
}
void AcceptTypeChange() {
sf_type_ = validated_type_;
}
void SetValidatedType(HWC2::Composition type) {
validated_type_ = type;
}
bool IsTypeChanged() const {
return sf_type_ != validated_type_;
}
bool GetPriorBufferScanOutFlag() const {
return prior_buffer_scanout_flag_;
}
void SetPriorBufferScanOutFlag(bool state) {
prior_buffer_scanout_flag_ = state;
}
uint32_t GetZOrder() const {
return z_order_;
}
auto &GetLayerData() {
return layer_data_;
}
// Layer hooks
HWC2::Error SetCursorPosition(int32_t /*x*/, int32_t /*y*/);
HWC2::Error SetLayerBlendMode(int32_t mode);
HWC2::Error SetLayerBuffer(buffer_handle_t buffer, int32_t acquire_fence);
HWC2::Error SetLayerColor(hwc_color_t /*color*/);
HWC2::Error SetLayerCompositionType(int32_t type);
HWC2::Error SetLayerDataspace(int32_t dataspace);
HWC2::Error SetLayerDisplayFrame(hwc_rect_t frame);
HWC2::Error SetLayerPlaneAlpha(float alpha);
HWC2::Error SetLayerSidebandStream(const native_handle_t *stream);
HWC2::Error SetLayerSourceCrop(hwc_frect_t crop);
HWC2::Error SetLayerSurfaceDamage(hwc_region_t damage);
HWC2::Error SetLayerTransform(int32_t transform);
HWC2::Error SetLayerVisibleRegion(hwc_region_t visible);
HWC2::Error SetLayerZOrder(uint32_t order);
private:
// sf_type_ stores the initial type given to us by surfaceflinger,
// validated_type_ stores the type after running ValidateDisplay
HWC2::Composition sf_type_ = HWC2::Composition::Invalid;
HWC2::Composition validated_type_ = HWC2::Composition::Invalid;
uint32_t z_order_ = 0;
LayerData layer_data_;
/* Should be populated to layer_data_.acquire_fence only before presenting */
UniqueFd acquire_fence_;
/* The following buffer data can have 2 sources:
* 1 - Mapper@4 metadata API
* 2 - HWC@2 API
* We keep ability to have 2 sources in drm_hwc. It may be useful for CLIENT
* layer, at this moment HWC@2 API can't specify blending mode for this layer,
* but Mapper@4 can do that
*/
BufferColorSpace color_space_{};
BufferSampleRange sample_range_{};
BufferBlendMode blend_mode_{};
buffer_handle_t buffer_handle_{};
bool buffer_handle_updated_{};
bool prior_buffer_scanout_flag_{};
HwcDisplay *const parent_;
/* Layer state */
public:
void PopulateLayerData(bool test);
bool IsLayerUsableAsDevice() const {
return !bi_get_failed_ && !fb_import_failed_ && buffer_handle_ != nullptr;
}
private:
void ImportFb();
bool bi_get_failed_{};
bool fb_import_failed_{};
/* SwapChain Cache */
public:
void SwChainClearCache();
private:
struct SwapChainElement {
std::optional<BufferInfo> bi;
std::shared_ptr<DrmFbIdHandle> fb;
};
bool SwChainGetBufferFromCache(BufferUniqueId unique_id);
void SwChainReassemble(BufferUniqueId unique_id);
void SwChainAddCurrentBuffer(BufferUniqueId unique_id);
std::map<int /*seq_no*/, SwapChainElement> swchain_cache_;
std::map<BufferUniqueId, int /*seq_no*/> swchain_lookup_table_;
bool swchain_reassembled_{};
};
} // namespace android
#endif
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