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/*
* Copyright (C) 2025 Igalia, S.L.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* aint with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#pragma once
#if ENABLE(WEBXR) && USE(OPENXR)
#include "OpenXRExtensions.h"
#include "PlatformXRCoordinator.h"
#include <WebCore/PageIdentifier.h>
#include <openxr/openxr.h>
#include <wtf/Box.h>
#include <wtf/TZoneMalloc.h>
#include <wtf/Threading.h>
namespace WebCore {
class GBMDevice;
class GLContext;
class GLDisplay;
}
namespace WebKit {
class OpenXRInput;
class OpenXRLayer;
class OpenXRSwapchain;
class OpenXRCoordinator final : public PlatformXRCoordinator {
WTF_MAKE_TZONE_ALLOCATED(OpenXRCoordinator);
struct RenderState;
public:
OpenXRCoordinator();
virtual ~OpenXRCoordinator();
void getPrimaryDeviceInfo(WebPageProxy&, DeviceInfoCallback&&) override;
void requestPermissionOnSessionFeatures(WebPageProxy&, const WebCore::SecurityOriginData&, PlatformXR::SessionMode, const PlatformXR::Device::FeatureList&, const PlatformXR::Device::FeatureList&, const PlatformXR::Device::FeatureList&, const PlatformXR::Device::FeatureList&, const PlatformXR::Device::FeatureList&, FeatureListCallback&&) override;
void createLayerProjection(uint32_t, uint32_t, bool, CompletionHandler<void(std::optional<PlatformXR::LayerHandle>)>&&) override;
void startSession(WebPageProxy&, WeakPtr<PlatformXRCoordinatorSessionEventClient>&&, const WebCore::SecurityOriginData&, PlatformXR::SessionMode, const PlatformXR::Device::FeatureList&, std::optional<WebCore::XRCanvasConfiguration>&&) override;
void endSessionIfExists(WebPageProxy&) override;
void scheduleAnimationFrame(WebPageProxy&, std::optional<PlatformXR::RequestData>&&, PlatformXR::Device::RequestFrameCallback&& onFrameUpdateCallback) override;
void submitFrame(WebPageProxy&, Vector<XRDeviceLayer>&&) override;
#if ENABLE(WEBXR_HIT_TEST)
void requestHitTestSource(WebPageProxy&, const PlatformXR::HitTestOptions&, CompletionHandler<void(WebCore::ExceptionOr<PlatformXR::HitTestSource>)>&&) override;
void deleteHitTestSource(WebPageProxy&, PlatformXR::HitTestSource) override;
void requestTransientInputHitTestSource(WebPageProxy&, const PlatformXR::TransientInputHitTestOptions&, CompletionHandler<void(WebCore::ExceptionOr<PlatformXR::TransientInputHitTestSource>)>&&) override;
void deleteTransientInputHitTestSource(WebPageProxy&, PlatformXR::TransientInputHitTestSource) override;
#endif
private:
void createInstance();
RefPtr<WebCore::GLDisplay> createGLDisplay(bool isForTesting) const;
void initializeDevice(bool isForTesting);
void initializeSystem();
void initializeBlendModes();
void collectViewConfigurations();
struct Idle {
};
struct Active {
WeakPtr<PlatformXRCoordinatorSessionEventClient> sessionEventClient;
WebCore::PageIdentifier pageIdentifier;
Box<RenderState> renderState;
RefPtr<WorkQueue> renderQueue;
bool didStart { false };
};
using State = Variant<Idle, Active>;
void createSessionIfNeeded();
void handleSessionStateChange();
void tryInitializeGraphicsBinding();
void cleanupAllResources();
void cleanupInstanceAndAssociatedResources();
void cleanupSessionAndAssociatedResources();
bool collectSwapchainFormatsIfNeeded();
enum class PollResult : bool;
PollResult pollEvents();
std::unique_ptr<OpenXRSwapchain> createSwapchain(uint32_t width, uint32_t height, bool alpha) const;
void createReferenceSpacesIfNeeded(Box<RenderState>);
PlatformXR::FrameData populateFrameData(Box<RenderState>);
void beginFrame(Box<RenderState>);
void endFrame(Box<RenderState>, Vector<XRDeviceLayer>&&);
void renderLoop(Box<RenderState>);
XrEnvironmentBlendMode blendModeForSessionMode(Box<RenderState>) const;
XRDeviceIdentifier m_deviceIdentifier { XRDeviceIdentifier::generate() };
XrInstance m_instance { XR_NULL_HANDLE };
XrSystemId m_systemId { XR_NULL_SYSTEM_ID };
State m_state;
Vector<XrViewConfigurationView> m_viewConfigurationViews;
XrViewConfigurationType m_currentViewConfiguration;
XrEnvironmentBlendMode m_vrBlendMode;
XrEnvironmentBlendMode m_arBlendMode;
PlatformXR::SessionMode m_sessionMode;
RefPtr<WebCore::GLDisplay> m_glDisplay;
#if USE(GBM)
mutable RefPtr<WebCore::GBMDevice> m_gbmDevice;
#endif
std::unique_ptr<OpenXRInput> m_input;
XrSession m_session { XR_NULL_HANDLE };
XrSessionState m_sessionState { XR_SESSION_STATE_UNKNOWN };
bool m_isSessionRunning { false };
Vector<XrView> m_views;
HashMap<PlatformXR::LayerHandle, std::unique_ptr<OpenXRLayer>> m_layers;
Vector<int64_t> m_supportedSwapchainFormats;
#if OS(ANDROID)
XrGraphicsBindingOpenGLESAndroidKHR m_graphicsBinding;
#else
XrGraphicsBindingEGLMNDX m_graphicsBinding;
#endif
std::unique_ptr<WebCore::GLContext> m_glContext;
XrSpace m_localSpace { XR_NULL_HANDLE };
XrSpace m_floorSpace { XR_NULL_HANDLE };
PlatformXR::LayerHandle m_nextLayerHandle { 1 };
};
} // namespace WebKit
#endif // ENABLE(WEBXR) && USE(OPENXR)
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