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/*
* Copyright (C) 2020 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.
*/
#include "config.h"
#if ENABLE(WEBXR) && USE(OPENXR)
#include "OpenXRSwapchain.h"
#include <wtf/TZoneMallocInlines.h>
using namespace WebCore;
namespace PlatformXR {
WTF_MAKE_TZONE_ALLOCATED_IMPL(OpenXRSwapchain);
std::unique_ptr<OpenXRSwapchain> OpenXRSwapchain::create(XrInstance instance, XrSession session, const XrSwapchainCreateInfo& info)
{
ASSERT(session != XR_NULL_HANDLE);
ASSERT(info.faceCount == 1);
XrSwapchain swapchain { XR_NULL_HANDLE };
auto result = xrCreateSwapchain(session, &info, &swapchain);
RETURN_IF_FAILED(result, "xrEnumerateInstanceExtensionProperties", instance, nullptr);
ASSERT(swapchain != XR_NULL_HANDLE);
uint32_t imageCount;
result = xrEnumerateSwapchainImages(swapchain, 0, &imageCount, nullptr);
RETURN_IF_FAILED(result, "xrEnumerateSwapchainImages", instance, nullptr);
if (!imageCount) {
LOG(XR, "xrEnumerateSwapchainImages(): no images\n");
return nullptr;
}
Vector<XrSwapchainImageOpenGLKHR> imageBuffers(imageCount, [] {
return createStructure<XrSwapchainImageOpenGLKHR, XR_TYPE_SWAPCHAIN_IMAGE_OPENGL_KHR>();
}());
Vector<XrSwapchainImageBaseHeader*> imageHeaders = imageBuffers.map([](auto& image) {
return (XrSwapchainImageBaseHeader*) ℑ
});
// Get images from an XrSwapchain
result = xrEnumerateSwapchainImages(swapchain, imageCount, &imageCount, imageHeaders[0]);
RETURN_IF_FAILED(result, "xrEnumerateSwapchainImages with imageCount", instance, nullptr);
return std::unique_ptr<OpenXRSwapchain>(new OpenXRSwapchain(instance, swapchain, info, WTFMove(imageBuffers)));
}
OpenXRSwapchain::OpenXRSwapchain(XrInstance instance, XrSwapchain swapchain, const XrSwapchainCreateInfo& info, Vector<XrSwapchainImageOpenGLKHR>&& imageBuffers)
: m_instance(instance)
, m_swapchain(swapchain)
, m_createInfo(info)
, m_imageBuffers(WTFMove(imageBuffers))
{
}
OpenXRSwapchain::~OpenXRSwapchain()
{
if (m_acquiredTexture)
releaseImage();
if (m_swapchain != XR_NULL_HANDLE)
xrDestroySwapchain(m_swapchain);
}
std::optional<PlatformGLObject> OpenXRSwapchain::acquireImage()
{
#if LOG_DISABLED
UNUSED_VARIABLE(m_instance);
#endif
RELEASE_ASSERT_WITH_MESSAGE(!m_acquiredTexture , "Expected no acquired images. ReleaseImage not called?");
auto acquireInfo = createStructure<XrSwapchainImageAcquireInfo, XR_TYPE_SWAPCHAIN_IMAGE_ACQUIRE_INFO>();
uint32_t swapchainImageIndex = 0;
auto result = xrAcquireSwapchainImage(m_swapchain, &acquireInfo, &swapchainImageIndex);
RETURN_IF_FAILED(result, "xrAcquireSwapchainImage", m_instance, std::nullopt);
RELEASE_ASSERT(swapchainImageIndex < m_imageBuffers.size());
auto waitInfo = createStructure<XrSwapchainImageWaitInfo, XR_TYPE_SWAPCHAIN_IMAGE_WAIT_INFO>();
waitInfo.timeout = XR_INFINITE_DURATION;
result = xrWaitSwapchainImage(m_swapchain, &waitInfo);
RETURN_IF_FAILED(result, "xrWaitSwapchainImage", m_instance, std::nullopt);
m_acquiredTexture = m_imageBuffers[swapchainImageIndex].image;
return m_acquiredTexture;
}
void OpenXRSwapchain::releaseImage()
{
RELEASE_ASSERT_WITH_MESSAGE(m_acquiredTexture, "Expected a valid acquired image. AcquireImage not called?");
auto releaseInfo = createStructure<XrSwapchainImageReleaseInfo, XR_TYPE_SWAPCHAIN_IMAGE_RELEASE_INFO>();
auto result = xrReleaseSwapchainImage(m_swapchain, &releaseInfo);
LOG_IF_FAILED(result, "xrReleaseSwapchainImage", m_instance);
m_acquiredTexture = 0;
}
} // namespace PlatformXR
#endif // ENABLE(WEBXR) && USE(OPENXR)
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