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/*
* Copyright (C) 2021 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 DRM_DRMFBIMPORTER_H_
#define DRM_DRMFBIMPORTER_H_
#include <drm/drm_fourcc.h>
#include <hardware/gralloc.h>
#include <array>
#include <map>
#include "drm/DrmDevice.h"
#include "drmhwcgralloc.h"
#ifndef DRM_FORMAT_INVALID
#define DRM_FORMAT_INVALID 0
#endif
using GemHandle = uint32_t;
namespace android {
class DrmFbIdHandle {
public:
static auto CreateInstance(hwc_drm_bo_t *bo, GemHandle first_gem_handle,
const std::shared_ptr<DrmDevice> &drm)
-> std::shared_ptr<DrmFbIdHandle>;
~DrmFbIdHandle();
DrmFbIdHandle(DrmFbIdHandle &&) = delete;
DrmFbIdHandle(const DrmFbIdHandle &) = delete;
auto operator=(const DrmFbIdHandle &) = delete;
auto operator=(DrmFbIdHandle &&) = delete;
auto GetFbId [[nodiscard]] () const -> uint32_t {
return fb_id_;
}
private:
explicit DrmFbIdHandle(std::shared_ptr<DrmDevice> drm)
: drm_(std::move(drm)){};
const std::shared_ptr<DrmDevice> drm_;
uint32_t fb_id_{};
std::array<GemHandle, kHwcDrmBoMaxPlanes> gem_handles_{};
};
class DrmFbImporter {
public:
explicit DrmFbImporter(std::shared_ptr<DrmDevice> drm)
: drm_(std::move(drm)){};
~DrmFbImporter() = default;
DrmFbImporter(const DrmFbImporter &) = delete;
DrmFbImporter(DrmFbImporter &&) = delete;
auto operator=(const DrmFbImporter &) = delete;
auto operator=(DrmFbImporter &&) = delete;
auto GetOrCreateFbId(hwc_drm_bo_t *bo) -> std::shared_ptr<DrmFbIdHandle>;
private:
void CleanupEmptyCacheElements() {
for (auto it = drm_fb_id_handle_cache_.begin();
it != drm_fb_id_handle_cache_.end();) {
if (it->second.expired()) {
it = drm_fb_id_handle_cache_.erase(it);
} else {
++it;
}
}
}
const std::shared_ptr<DrmDevice> drm_;
std::map<GemHandle, std::weak_ptr<DrmFbIdHandle>> drm_fb_id_handle_cache_;
};
} // namespace android
#endif
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