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/*
* Copyright (C) 2024 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.
*/
#include "config.h"
#include "XRGPUBinding.h"
#if ENABLE(WEBXR_LAYERS)
#include "GPUDevice.h"
#include "WebGPUXRBinding.h"
#include "WebGPUXREye.h"
#include "WebGPUXRView.h"
#include "WebXRFrame.h"
#include "WebXRView.h"
#include "XRCompositionLayer.h"
#include "XRGPUProjectionLayerInit.h"
#include "XRGPUSubImage.h"
#include "XRProjectionLayer.h"
#include <wtf/TZoneMallocInlines.h>
namespace WebCore {
static WebGPU::XREye convertToBacking(XREye eye)
{
switch (eye) {
case PlatformXR::Eye::None:
return WebGPU::XREye::None;
case PlatformXR::Eye::Left:
return WebGPU::XREye::Left;
case PlatformXR::Eye::Right:
return WebGPU::XREye::Right;
}
}
WTF_MAKE_TZONE_OR_ISO_ALLOCATED_IMPL(XRGPUBinding);
XRGPUBinding::XRGPUBinding(const WebXRSession& session, GPUDevice& device)
: m_backing(device.createXRBinding(session))
, m_session(&session)
, m_device(device)
{
}
GPUDevice& XRGPUBinding::device()
{
return m_device;
}
ExceptionOr<Ref<XRProjectionLayer>> XRGPUBinding::createProjectionLayer(ScriptExecutionContext& scriptExecutionContext, std::optional<XRGPUProjectionLayerInit> init)
{
if (!m_backing)
return Exception { ExceptionCode::AbortError };
WebGPU::XRProjectionLayerInit convertedInit;
if (init)
convertedInit = init->convertToBacking();
RefPtr projectionLayer = m_backing->createProjectionLayer(convertedInit);
if (!projectionLayer)
return Exception { ExceptionCode::AbortError };
m_init = init;
return XRProjectionLayer::create(scriptExecutionContext, projectionLayer.releaseNonNull());
}
double XRGPUBinding::nativeProjectionScaleFactor() const
{
return m_init ? m_init->scaleFactor : 1.0;
}
RefPtr<XRGPUSubImage> XRGPUBinding::getSubImage(XRCompositionLayer&, WebXRFrame&, std::optional<XREye>/* = "none"*/)
{
RELEASE_ASSERT_NOT_REACHED();
return nullptr;
}
ExceptionOr<Ref<XRGPUSubImage>> XRGPUBinding::getViewSubImage(XRProjectionLayer& projectionLayer, WebXRView& xrView)
{
if (!m_backing)
return Exception { ExceptionCode::AbortError };
auto layerData = projectionLayer.layerData();
if (!layerData)
return Exception { ExceptionCode::AbortError, "First frame is not ready"_s };
auto setupData = layerData->layerSetup;
auto textureData = layerData->textureData;
if (!setupData || !textureData)
return Exception { ExceptionCode::AbortError, "Layer setup or texture data is missing"_s };
unsigned eyeIndex = xrView.eye() == XREye::Right ? 1 : 0;
auto physicalSize = setupData->physicalSize[eyeIndex];
if (!physicalSize[0] || !physicalSize[1])
physicalSize = setupData->physicalSize[0];
auto viewport = setupData->viewports[eyeIndex];
if (eyeIndex)
viewport.move(-setupData->viewports[0].width(), 0);
RefPtr subImage = m_backing->getViewSubImage(projectionLayer.backing());
return XRGPUSubImage::create(subImage.releaseNonNull(), convertToBacking(xrView.eye()), WTFMove(physicalSize), WTFMove(viewport), m_device);
}
GPUTextureFormat XRGPUBinding::getPreferredColorFormat()
{
return GPUTextureFormat::Bgra8unorm;
}
} // namespace WebCore
#endif // ENABLE(WEBXR_LAYERS)
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