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/*
* Copyright (C) 2020 Igalia S.L. All rights reserved.
* Copyright (C) 2021-2023 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 "GraphicsContextGL.h"
#include "GraphicsTypesGL.h"
#include "PlatformXR.h"
#include "WebXRLayer.h"
#include <wtf/Ref.h>
#include <wtf/RetainPtr.h>
#include <wtf/Vector.h>
namespace WebCore {
class IntSize;
class WebGLFramebuffer;
class WebGLRenderingContextBase;
struct XRWebGLLayerInit;
struct WebXRExternalRenderbuffer {
GCGLOwnedRenderbuffer renderBufferObject;
GCGLOwnedExternalImage image;
explicit operator bool() const { return !!image; }
void destroyImage(GraphicsContextGL&);
void release(GraphicsContextGL&);
void leakObject();
};
template<typename T>
struct WebXRAttachmentSet {
T colorBuffer;
T depthStencilBuffer;
operator bool() const
{
return !!colorBuffer; // Need colorBuffer at the minimum!
}
void release(GraphicsContextGL& gl)
{
colorBuffer.release(gl);
depthStencilBuffer.release(gl);
}
void leakObject()
{
colorBuffer.leakObject();
depthStencilBuffer.leakObject();
}
};
using WebXRAttachments = WebXRAttachmentSet<GCGLOwnedRenderbuffer>;
using WebXRExternalAttachments = WebXRAttachmentSet<WebXRExternalRenderbuffer>;
class WebXROpaqueFramebuffer {
public:
struct Attributes {
bool alpha { true };
bool antialias { true };
bool depth { true };
bool stencil { false };
};
static std::unique_ptr<WebXROpaqueFramebuffer> create(PlatformXR::LayerHandle, WebGLRenderingContextBase&, Attributes&&, IntSize);
~WebXROpaqueFramebuffer();
bool supportsDynamicViewportScaling() const;
PlatformXR::LayerHandle handle() const { return m_handle; }
const WebGLFramebuffer& framebuffer() const { return m_drawFramebuffer.get(); }
// Return the size of the framebuffer is Screen Space
IntSize drawFramebufferSize() const;
// Return the viewport for eye in Screen Space
IntRect drawViewport(PlatformXR::Eye) const;
void startFrame(PlatformXR::FrameData::LayerData&);
void endFrame();
bool usesLayeredMode() const;
#if PLATFORM(COCOA)
void releaseAllDisplayAttachments();
#endif
private:
WebXROpaqueFramebuffer(PlatformXR::LayerHandle, Ref<WebGLFramebuffer>&&, WebGLRenderingContextBase&, Attributes&&, IntSize);
#if PLATFORM(COCOA)
bool setupFramebuffer(GraphicsContextGL&, const PlatformXR::FrameData::LayerSetupData&);
const std::array<WebXRExternalAttachments, 2>* reusableDisplayAttachments(const PlatformXR::FrameData::ExternalTextureData&) const;
void bindCompositorTexturesForDisplay(GraphicsContextGL&, const PlatformXR::FrameData::LayerData&);
const std::array<WebXRExternalAttachments, 2>* reusableDisplayAttachmentsAtIndex(size_t);
void releaseDisplayAttachmentsAtIndex(size_t);
#endif
void allocateRenderbufferStorage(GraphicsContextGL&, GCGLOwnedRenderbuffer&, GCGLsizei, GCGLenum, IntSize);
void allocateAttachments(GraphicsContextGL&, WebXRAttachments&, GCGLsizei, IntSize);
void bindAttachments(GraphicsContextGL&, WebXRAttachments&);
#if PLATFORM(COCOA)
void bindResolveAttachments(GraphicsContextGL&, WebXRAttachments&);
#endif
void resolveMSAAFramebuffer(GraphicsContextGL&);
void blitShared(GraphicsContextGL&);
void blitSharedToLayered(GraphicsContextGL&);
IntRect calculateViewportShared(PlatformXR::Eye, bool, const IntRect&, const IntRect&);
PlatformXR::LayerHandle m_handle;
Ref<WebGLFramebuffer> m_drawFramebuffer;
WebGLRenderingContextBase& m_context;
Attributes m_attributes;
PlatformXR::Layout m_displayLayout = PlatformXR::Layout::Shared;
IntSize m_framebufferSize; // Physical Space
#if PLATFORM(COCOA)
IntRect m_leftViewport; // Screen Space
IntRect m_rightViewport; // Screen Space
IntSize m_leftPhysicalSize; // Physical Space
IntSize m_rightPhysicalSize; // Physical Space
#endif
WebXRAttachments m_drawAttachments;
WebXRAttachments m_resolveAttachments;
GCGLOwnedFramebuffer m_displayFBO;
GCGLOwnedFramebuffer m_resolvedFBO;
#if PLATFORM(COCOA)
Vector<std::array<WebXRExternalAttachments, 2>> m_displayAttachmentsSets;
size_t m_currentDisplayAttachmentIndex { 0 };
MachSendRight m_completionSyncEvent;
uint64_t m_renderingFrameIndex { ~0u };
bool m_usingFoveation { false };
bool m_blitDepth { false };
#else
PlatformGLObject m_colorTexture;
#endif
};
} // namespace WebCore
#endif // ENABLE(WEBXR)
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