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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_OZONE_PLATFORM_DRM_GPU_DRM_OVERLAY_MANAGER_H_
#define UI_OZONE_PLATFORM_DRM_GPU_DRM_OVERLAY_MANAGER_H_
#include <memory>
#include <vector>
#include "base/containers/circular_deque.h"
#include "base/containers/flat_map.h"
#include "base/containers/flat_set.h"
#include "base/containers/lru_cache.h"
#include "base/threading/thread_checker.h"
#include "base/time/time.h"
#include "ui/gfx/native_widget_types.h"
#include "ui/ozone/public/hardware_capabilities.h"
#include "ui/ozone/public/overlay_candidates_ozone.h"
#include "ui/ozone/public/overlay_manager_ozone.h"
namespace ui {
class OverlaySurfaceCandidate;
// Ozone DRM extension of the OverlayManagerOzone interface. It queries the
// DrmDevice to see if an overlay configuration will work and keeps an MRU cache
// of recent configurations.
class DrmOverlayManager : public OverlayManagerOzone {
public:
DrmOverlayManager(bool handle_overlays_swap_failure,
bool allow_sync_and_real_buffer_page_flip_testing);
DrmOverlayManager(const DrmOverlayManager&) = delete;
DrmOverlayManager& operator=(const DrmOverlayManager&) = delete;
~DrmOverlayManager() override;
// OverlayManagerOzone:
std::unique_ptr<OverlayCandidatesOzone> CreateOverlayCandidates(
gfx::AcceleratedWidget w) override;
// Called when notified by the DRM thread of a display configuration change.
// Resets the cache of OverlaySurfaceCandidates and if they can be displayed
// as an overlay. Requests an updated HardwareCapabilities for any observing
// OverlayProcessors.
void DisplaysConfigured();
// Checks if overlay candidates can be displayed as overlays. Modifies
// |candidates| to indicate if they can.
void CheckOverlaySupport(std::vector<OverlaySurfaceCandidate>* candidates,
gfx::AcceleratedWidget widget);
void StartObservingHardwareCapabilities(
gfx::AcceleratedWidget widget,
HardwareCapabilitiesCallback receive_callback);
void StopObservingHardwareCapabilities(gfx::AcceleratedWidget widget);
virtual void GetHardwareCapabilities(
gfx::AcceleratedWidget widget,
HardwareCapabilitiesCallback& receive_callback) = 0;
// Should be called by the overlay processor to indicate if a widget has a
// candidate that requires an overlay. This is to prioritize which display
// gets the overlay in a multiple display environment.
void RegisterOverlayRequirement(gfx::AcceleratedWidget widget,
bool requires_overlay);
// Should be called by the overlay processor to indicate status of the last
// swap.
void OnSwapBuffersComplete(gfx::SwapResult swap_result);
// Should be called by the overlay processor once it gets hardware
// capabilities.
void SetSupportedBufferFormats(
gfx::AcceleratedWidget widget,
base::flat_set<gfx::BufferFormat> supported_buffer_formats);
// Should be called by the overlay processor to indicate what overlay types
// are promoted. This is later used in |OnSwapBuffersComplete| to distinguish
// overlay types. Can be empty.
void OnPromotedOverlayTypes(
std::vector<gfx::OverlayType> promoted_overlay_types);
protected:
// Sends a request to see if overlay configuration will work. Implementations
// should call UpdateCacheForOverlayCandidates() with the response.
virtual void SendOverlayValidationRequest(
const std::vector<OverlaySurfaceCandidate>& candidates,
gfx::AcceleratedWidget widget) = 0;
// Similar to SendOverlayValidationRequest() but instead of calling
// UpdateCacheForOverlayCandidates(), returns the result synchronously.
virtual std::vector<OverlayStatus> SendOverlayValidationRequestSync(
const std::vector<OverlaySurfaceCandidate>& candidates,
gfx::AcceleratedWidget widget) = 0;
// Perform basic validation to see if |candidate| is a valid request.
bool CanHandleCandidate(const OverlaySurfaceCandidate& candidate,
gfx::AcceleratedWidget widget) const;
// Checks if gfx::BufferFormat that overlay candidate requires is supported
// by hardware.
bool IsBufferFormatSupported(gfx::BufferFormat required_overlay_buffer_format,
gfx::AcceleratedWidget widget) const;
// Updates the MRU cache for overlay configuration |candidates| with |status|.
void UpdateCacheForOverlayCandidates(
const std::vector<OverlaySurfaceCandidate>& candidates,
const gfx::AcceleratedWidget widget,
const std::vector<OverlayStatus>& status);
base::TimeTicks disallow_fullscreen_overlays_end_time() const {
return disallow_fullscreen_overlays_end_time_;
}
private:
// Value for the request cache, that keeps track of how many times a
// specific validation has been requested, if there is a GPU validation
// in flight, and at last the result of the validation.
struct OverlayValidationCacheValue {
OverlayValidationCacheValue();
OverlayValidationCacheValue(OverlayValidationCacheValue&& other);
~OverlayValidationCacheValue();
OverlayValidationCacheValue& operator=(OverlayValidationCacheValue&& other);
int request_num = 0;
std::vector<OverlayStatus> status;
};
using OverlayCandidatesListCache =
base::LRUCache<std::vector<OverlaySurfaceCandidate>,
OverlayValidationCacheValue>;
// Map of each widget to the cache of list of all OverlaySurfaceCandidate
// instances which have been requested for validation and/or validated.
std::map<gfx::AcceleratedWidget, OverlayCandidatesListCache>
widget_cache_map_;
base::flat_set<gfx::AcceleratedWidget> widgets_with_required_overlays_;
std::map<gfx::AcceleratedWidget, HardwareCapabilitiesCallback>
hardware_capabilities_callbacks_;
base::flat_map<gfx::AcceleratedWidget, base::flat_set<gfx::BufferFormat>>
per_widget_overlay_supported_buffer_formats_;
// A simple queue of bools that helps to identify buffer swaps.
base::circular_deque<std::vector<gfx::OverlayType>> in_flight_overlay_types_;
// Tell the manager to handle overlay swap failures.
// TODO(b/331237773): Unfortunately, the kHandleOverlaysSwapFailure feature
// cannot be checked by the this overlay manager in ozone directly as it
// creates a circular dependency. That's why this control bool is here. Remove
// this once kHandleOverlaysSwapFailure is removed and DrmOverlayManager is
// always handling swap failures.
const bool handle_overlays_swap_failure_;
// Control variable, which allows to promote fullscreen overlay candidates
// without drm testing if |handle_overlays_swap_failure_| is true.
bool allow_skip_fullscreen_overlay_drm_test_ = true;
// The end time when fullscreen overlay drm test is allowed again. This is
// set when fullscreen overlay fails and the manager has to start to do
// drm test of fullscreen overlays again.
base::TimeTicks disallow_fullscreen_overlays_end_time_;
THREAD_CHECKER(thread_checker_);
};
} // namespace ui
#endif // UI_OZONE_PLATFORM_DRM_GPU_DRM_OVERLAY_MANAGER_H_
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