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/*
* Copyright (C) 2020 Igalia S.L. All rights reserved.
* Copyright (C) 2023 Apple, Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#if ENABLE(WEBXR)
#include "CanvasObserver.h"
#include "ExceptionOr.h"
#include "FloatRect.h"
#include "GraphicsTypesGL.h"
#include "PlatformXR.h"
#include "WebXRLayer.h"
#include <variant>
#include <wtf/Ref.h>
#include <wtf/RefPtr.h>
#include <wtf/TZoneMalloc.h>
namespace WebCore {
class HTMLCanvasElement;
class IntSize;
class WebGLFramebuffer;
class WebGLRenderingContext;
class WebGLRenderingContextBase;
class WebGL2RenderingContext;
class WebXROpaqueFramebuffer;
class WebXRSession;
class WebXRView;
class WebXRViewport;
struct XRWebGLLayerInit;
class WebXRWebGLLayer : public WebXRLayer, private CanvasObserver {
WTF_MAKE_TZONE_OR_ISO_ALLOCATED(WebXRWebGLLayer);
public:
using WebXRRenderingContext = std::variant<
RefPtr<WebGLRenderingContext>,
RefPtr<WebGL2RenderingContext>
>;
static ExceptionOr<Ref<WebXRWebGLLayer>> create(Ref<WebXRSession>&&, WebXRRenderingContext&&, const XRWebGLLayerInit&);
~WebXRWebGLLayer();
bool antialias() const;
bool ignoreDepthValues() const;
const WebGLFramebuffer* framebuffer() const;
unsigned framebufferWidth() const;
unsigned framebufferHeight() const;
ExceptionOr<RefPtr<WebXRViewport>> getViewport(WebXRView&);
static double getNativeFramebufferScaleFactor(const WebXRSession&);
const WebXRSession* session() { return m_session.get(); }
bool isCompositionEnabled() const { return m_isCompositionEnabled; }
HTMLCanvasElement* canvas() const;
void sessionEnded();
// WebXRLayer
void startFrame(PlatformXR::FrameData&) final;
PlatformXR::Device::Layer endFrame() final;
private:
WebXRWebGLLayer(Ref<WebXRSession>&&, WebXRRenderingContext&&, std::unique_ptr<WebXROpaqueFramebuffer>&&, bool antialias, bool ignoreDepthValues, bool isCompositionEnabled);
void computeViewports();
static IntSize computeNativeWebGLFramebufferResolution();
static IntSize computeRecommendedWebGLFramebufferResolution();
void canvasChanged(CanvasBase&, const FloatRect&) final { };
void canvasResized(CanvasBase&) final;
void canvasDestroyed(CanvasBase&) final { };
RefPtr<WebXRSession> m_session;
WebXRRenderingContext m_context;
struct ViewportData {
Ref<WebXRViewport> viewport;
double currentScale { 1.0 };
};
ViewportData m_leftViewportData;
ViewportData m_rightViewportData;
std::unique_ptr<WebXROpaqueFramebuffer> m_framebuffer;
bool m_antialias { false };
bool m_ignoreDepthValues { false };
bool m_isCompositionEnabled { true };
};
} // namespace WebCore
#endif // ENABLE(WEBXR)
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