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// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/exo/wayland/overlay_prioritizer.h"
#include <overlay-prioritizer-server-protocol.h>
#include <memory>
#include "base/memory/raw_ptr.h"
#include "components/exo/surface.h"
#include "components/exo/surface_observer.h"
#include "components/exo/wayland/server_util.h"
namespace exo {
namespace wayland {
namespace {
// A property key containing a boolean set to true if a surface augmenter is
// associated with with surface object.
DEFINE_UI_CLASS_PROPERTY_KEY(bool, kSurfaceHasOverlayPrioritizerKey, false)
////////////////////////////////////////////////////////////////////////////////
// overlay_prioritized_surface_interface:
// Implements the augmenter interface to a Surface. The "augmented"-state is set
// to null upon destruction. A window property will be set during the lifetime
// of this class to prevent multiple instances from being created for the same
// Surface.
class OverlayPrioritizedSurface : public SurfaceObserver {
public:
explicit OverlayPrioritizedSurface(Surface* surface) : surface_(surface) {
surface_->AddSurfaceObserver(this);
surface_->SetProperty(kSurfaceHasOverlayPrioritizerKey, true);
}
OverlayPrioritizedSurface(const OverlayPrioritizedSurface&) = delete;
OverlayPrioritizedSurface& operator=(const OverlayPrioritizedSurface&) =
delete;
~OverlayPrioritizedSurface() override {
if (surface_) {
surface_->RemoveSurfaceObserver(this);
surface_->SetProperty(kSurfaceHasOverlayPrioritizerKey, false);
}
}
void SetOverlayPriority(uint priority) {
OverlayPriority hint = OverlayPriority::REGULAR;
switch (priority) {
case OVERLAY_PRIORITIZED_SURFACE_OVERLAY_PRIORITY_NONE:
hint = OverlayPriority::LOW;
break;
case OVERLAY_PRIORITIZED_SURFACE_OVERLAY_PRIORITY_REQUIRED_HARDWARE_PROTECTION:
case OVERLAY_PRIORITIZED_SURFACE_OVERLAY_PRIORITY_PREFERRED_LOW_LATENCY_CANVAS:
hint = OverlayPriority::REQUIRED;
break;
default:
hint = OverlayPriority::REGULAR;
}
surface_->SetOverlayPriorityHint(hint);
}
// Overridden from SurfaceObserver:
void OnSurfaceDestroying(Surface* surface) override {
surface->RemoveSurfaceObserver(this);
surface_ = nullptr;
}
private:
raw_ptr<Surface, ExperimentalAsh> surface_;
};
void overlay_prioritized_surface_destroy(wl_client* client,
wl_resource* resource) {
wl_resource_destroy(resource);
}
void overlay_prioritized_surface_set_overlay_priority(wl_client* client,
wl_resource* resource,
uint priority) {
if (OVERLAY_PRIORITIZED_SURFACE_OVERLAY_PRIORITY_REQUIRED_HARDWARE_PROTECTION <
priority) {
wl_resource_post_error(resource,
OVERLAY_PRIORITIZED_SURFACE_ERROR_BAD_VALUE,
"priority is out of bound");
return;
}
GetUserDataAs<OverlayPrioritizedSurface>(resource)->SetOverlayPriority(
priority);
}
const struct overlay_prioritized_surface_interface prioritized_implementation =
{overlay_prioritized_surface_destroy,
overlay_prioritized_surface_set_overlay_priority};
////////////////////////////////////////////////////////////////////////////////
// overlay_prioritizer_interface:
void prioritizer_destroy(wl_client* client, wl_resource* resource) {
wl_resource_destroy(resource);
}
void prioritizer_get_prioritized_surface(wl_client* client,
wl_resource* resource,
uint32_t id,
wl_resource* surface_resource) {
Surface* surface = GetUserDataAs<Surface>(surface_resource);
if (surface->GetProperty(kSurfaceHasOverlayPrioritizerKey)) {
wl_resource_post_error(
resource, OVERLAY_PRIORITIZER_ERROR_OVERLAY_HINTED_SURFACE_EXISTS,
"a prioritizer for that surface already exists");
return;
}
wl_resource* prioritized_resource =
wl_resource_create(client, &overlay_prioritized_surface_interface,
wl_resource_get_version(resource), id);
SetImplementation(prioritized_resource, &prioritized_implementation,
std::make_unique<OverlayPrioritizedSurface>(surface));
}
const struct overlay_prioritizer_interface prioritizer_implementation = {
prioritizer_destroy, prioritizer_get_prioritized_surface};
} // namespace
void bind_overlay_prioritizer(wl_client* client,
void* data,
uint32_t version,
uint32_t id) {
wl_resource* resource =
wl_resource_create(client, &overlay_prioritizer_interface,
std::min(version, kOverlayPrioritizerVersion), id);
wl_resource_set_implementation(resource, &prioritizer_implementation, data,
nullptr);
}
} // namespace wayland
} // namespace exo
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