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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 "XRProjectionLayer.h"
#if ENABLE(WEBXR_LAYERS)
#include "PlatformXR.h"
#include <wtf/TZoneMallocInlines.h>
namespace WebCore {
WTF_MAKE_TZONE_OR_ISO_ALLOCATED_IMPL(XRProjectionLayer);
#if ENABLE(WEBGPU)
XRProjectionLayer::XRProjectionLayer(ScriptExecutionContext& scriptExecutionContext, Ref<WebCore::WebGPU::XRProjectionLayer>&& backing)
: XRCompositionLayer(&scriptExecutionContext)
, m_backing(WTFMove(backing))
{
}
#endif
XRProjectionLayer::~XRProjectionLayer() = default;
void XRProjectionLayer::startFrame(PlatformXR::FrameData& data)
{
#if ENABLE(WEBGPU)
static constexpr auto defaultLayerHandle = 1;
auto it = data.layers.find(defaultLayerHandle);
if (it == data.layers.end()) {
// For some reason the device didn't provide a texture for this frame.
// The frame is ignored and the device can recover the texture in future frames;
return;
}
auto& frameData = it->value;
if (frameData->layerSetup && frameData->textureData) {
m_layerData = frameData;
auto& textureData = frameData->textureData;
m_backing->startFrame(frameData->renderingFrameIndex, WTFMove(textureData->colorTexture.handle), WTFMove(textureData->depthStencilBuffer.handle), WTFMove(frameData->layerSetup->completionSyncEvent), textureData->reusableTextureIndex, WTFMove(frameData->layerSetup->foveationRateMapDesc));
}
#else
UNUSED_PARAM(data);
#endif
}
#if ENABLE(WEBGPU)
std::optional<PlatformXR::FrameData::LayerData> XRProjectionLayer::layerData() const
{
return m_layerData;
}
#endif
PlatformXR::Device::Layer XRProjectionLayer::endFrame()
{
#if ENABLE(WEBGPU)
m_backing->endFrame();
#endif
return PlatformXR::Device::Layer {
.handle = 0,
.visible = true,
.views = { },
#if PLATFORM(GTK) || PLATFORM(WPE)
.fenceFD = { }
#endif
};
}
uint32_t XRProjectionLayer::textureWidth() const
{
#if ENABLE(WEBGPU)
return m_backing->textureWidth();
#endif
return 0;
}
uint32_t XRProjectionLayer::textureHeight() const
{
#if ENABLE(WEBGPU)
return m_backing->textureHeight();
#endif
return 0;
}
uint32_t XRProjectionLayer::textureArrayLength() const
{
#if ENABLE(WEBGPU)
#if PLATFORM(IOS_FAMILY_SIMULATOR)
ASSERT(m_backing->textureArrayLength() == 1);
#else
ASSERT(m_backing->textureArrayLength() == 2);
#endif
return m_backing->textureArrayLength();
#endif
return 0;
}
bool XRProjectionLayer::ignoreDepthValues() const
{
return false;
}
std::optional<float> XRProjectionLayer::fixedFoveation() const
{
return 1.0;
}
void XRProjectionLayer::setFixedFoveation(std::optional<float>)
{
}
WebXRRigidTransform* XRProjectionLayer::deltaPose() const
{
return m_transform.get();
}
void XRProjectionLayer::setDeltaPose(WebXRRigidTransform* deltaPose)
{
m_transform = deltaPose;
}
#if ENABLE(WEBGPU)
WebCore::WebGPU::XRProjectionLayer& XRProjectionLayer::backing()
{
return m_backing;
}
#endif
} // namespace WebCore
#endif // ENABLE(WEBXR_LAYERS)
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