dxvk/src/dxvk/dxvk_presenter.cpp

700 lines
24 KiB
C++

#include <algorithm>
#include "dxvk_device.h"
#include "dxvk_presenter.h"
#include "../wsi/wsi_window.h"
namespace dxvk {
Presenter::Presenter(
const Rc<DxvkDevice>& device,
const Rc<sync::Signal>& signal,
const PresenterDesc& desc)
: m_device(device), m_signal(signal),
m_vki(device->instance()->vki()),
m_vkd(device->vkd()) {
// If a frame signal was provided, launch thread that synchronizes
// with present operations and periodically signals the event
if (m_device->features().khrPresentWait.presentWait && m_signal != nullptr)
m_frameThread = dxvk::thread([this] { runFrameThread(); });
}
Presenter::~Presenter() {
destroySwapchain();
destroySurface();
if (m_frameThread.joinable()) {
{ std::lock_guard<dxvk::mutex> lock(m_frameMutex);
m_frameQueue.push(PresenterFrame());
m_frameCond.notify_one();
}
m_frameThread.join();
}
}
PresenterInfo Presenter::info() const {
return m_info;
}
PresenterImage Presenter::getImage(uint32_t index) const {
return m_images.at(index);
}
VkResult Presenter::acquireNextImage(PresenterSync& sync, uint32_t& index) {
sync = m_semaphores.at(m_frameIndex);
// Don't acquire more than one image at a time
if (m_acquireStatus == VK_NOT_READY) {
m_acquireStatus = m_vkd->vkAcquireNextImageKHR(m_vkd->device(),
m_swapchain, std::numeric_limits<uint64_t>::max(),
sync.acquire, VK_NULL_HANDLE, &m_imageIndex);
}
if (m_acquireStatus != VK_SUCCESS && m_acquireStatus != VK_SUBOPTIMAL_KHR)
return m_acquireStatus;
index = m_imageIndex;
return m_acquireStatus;
}
VkResult Presenter::presentImage(
VkPresentModeKHR mode,
uint64_t frameId) {
PresenterSync sync = m_semaphores.at(m_frameIndex);
VkPresentIdKHR presentId = { VK_STRUCTURE_TYPE_PRESENT_ID_KHR };
presentId.swapchainCount = 1;
presentId.pPresentIds = &frameId;
VkSwapchainPresentModeInfoEXT modeInfo = { VK_STRUCTURE_TYPE_SWAPCHAIN_PRESENT_MODE_INFO_EXT };
modeInfo.swapchainCount = 1;
modeInfo.pPresentModes = &mode;
VkPresentInfoKHR info = { VK_STRUCTURE_TYPE_PRESENT_INFO_KHR };
info.waitSemaphoreCount = 1;
info.pWaitSemaphores = &sync.present;
info.swapchainCount = 1;
info.pSwapchains = &m_swapchain;
info.pImageIndices = &m_imageIndex;
if (m_device->features().khrPresentId.presentId && frameId)
presentId.pNext = const_cast<void*>(std::exchange(info.pNext, &presentId));
if (m_device->features().extSwapchainMaintenance1.swapchainMaintenance1)
modeInfo.pNext = const_cast<void*>(std::exchange(info.pNext, &modeInfo));
VkResult status = m_vkd->vkQueuePresentKHR(
m_device->queues().graphics.queueHandle, &info);
if (status != VK_SUCCESS && status != VK_SUBOPTIMAL_KHR)
return status;
// Try to acquire next image already, in order to hide
// potential delays from the application thread.
m_frameIndex += 1;
m_frameIndex %= m_semaphores.size();
sync = m_semaphores.at(m_frameIndex);
m_acquireStatus = m_vkd->vkAcquireNextImageKHR(m_vkd->device(),
m_swapchain, std::numeric_limits<uint64_t>::max(),
sync.acquire, VK_NULL_HANDLE, &m_imageIndex);
return status;
}
void Presenter::signalFrame(
VkResult result,
VkPresentModeKHR mode,
uint64_t frameId) {
if (m_signal == nullptr || !frameId)
return;
if (m_device->features().khrPresentWait.presentWait) {
std::lock_guard<dxvk::mutex> lock(m_frameMutex);
PresenterFrame frame = { };
frame.result = result;
frame.mode = mode;
frame.frameId = frameId;
m_frameQueue.push(frame);
m_frameCond.notify_one();
} else {
applyFrameRateLimit(mode);
m_signal->signal(frameId);
}
m_lastFrameId.store(frameId, std::memory_order_release);
}
VkResult Presenter::recreateSurface(
const std::function<VkResult (VkSurfaceKHR*)>& fn) {
if (m_swapchain)
destroySwapchain();
if (m_surface)
destroySurface();
return fn(&m_surface);
}
VkResult Presenter::recreateSwapChain(const PresenterDesc& desc) {
if (m_swapchain)
destroySwapchain();
if (!m_surface)
return VK_ERROR_SURFACE_LOST_KHR;
VkSurfaceFullScreenExclusiveInfoEXT fullScreenExclusiveInfo = { VK_STRUCTURE_TYPE_SURFACE_FULL_SCREEN_EXCLUSIVE_INFO_EXT };
fullScreenExclusiveInfo.fullScreenExclusive = desc.fullScreenExclusive;
VkPhysicalDeviceSurfaceInfo2KHR surfaceInfo = { VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SURFACE_INFO_2_KHR };
surfaceInfo.surface = m_surface;
if (m_device->features().extFullScreenExclusive)
surfaceInfo.pNext = &fullScreenExclusiveInfo;
// Query surface capabilities. Some properties might have changed,
// including the size limits and supported present modes, so we'll
// just query everything again.
VkSurfaceCapabilities2KHR caps = { VK_STRUCTURE_TYPE_SURFACE_CAPABILITIES_2_KHR };
std::vector<VkSurfaceFormatKHR> formats;
std::vector<VkPresentModeKHR> modes;
VkResult status;
if (m_device->features().extFullScreenExclusive) {
status = m_vki->vkGetPhysicalDeviceSurfaceCapabilities2KHR(
m_device->adapter()->handle(), &surfaceInfo, &caps);
} else {
status = m_vki->vkGetPhysicalDeviceSurfaceCapabilitiesKHR(
m_device->adapter()->handle(), m_surface, &caps.surfaceCapabilities);
}
if (status)
return status;
// Select image extent based on current surface capabilities, and return
// immediately if we cannot create an actual swap chain.
m_info.imageExtent = pickImageExtent(caps.surfaceCapabilities, desc.imageExtent);
if (!m_info.imageExtent.width || !m_info.imageExtent.height) {
m_info.imageCount = 0;
m_info.format = { VK_FORMAT_UNDEFINED, VK_COLOR_SPACE_SRGB_NONLINEAR_KHR };
return VK_SUCCESS;
}
// Select format based on swap chain properties
if ((status = getSupportedFormats(formats, desc.fullScreenExclusive)))
return status;
m_info.format = pickFormat(formats.size(), formats.data(), desc.numFormats, desc.formats);
// Select a present mode for the current sync interval
if ((status = getSupportedPresentModes(modes, desc.fullScreenExclusive)))
return status;
m_info.presentMode = pickPresentMode(modes.size(), modes.data(), m_info.syncInterval);
// Check whether we can change present modes dynamically. This may
// influence the image count as well as further swap chain creation.
std::vector<VkPresentModeKHR> dynamicModes = {{
pickPresentMode(modes.size(), modes.data(), 0),
pickPresentMode(modes.size(), modes.data(), 1),
}};
std::vector<VkPresentModeKHR> compatibleModes;
// As for the minimum image count, start with the most generic value
// that works with all present modes.
uint32_t minImageCount = caps.surfaceCapabilities.minImageCount;
uint32_t maxImageCount = caps.surfaceCapabilities.maxImageCount;
if (m_device->features().extSwapchainMaintenance1.swapchainMaintenance1) {
VkSurfacePresentModeCompatibilityEXT compatibleModeInfo = { VK_STRUCTURE_TYPE_SURFACE_PRESENT_MODE_COMPATIBILITY_EXT };
VkSurfacePresentModeEXT presentModeInfo = { VK_STRUCTURE_TYPE_SURFACE_PRESENT_MODE_EXT };
presentModeInfo.pNext = const_cast<void*>(std::exchange(surfaceInfo.pNext, &presentModeInfo));
presentModeInfo.presentMode = m_info.presentMode;
caps.pNext = &compatibleModeInfo;
if ((status = m_vki->vkGetPhysicalDeviceSurfaceCapabilities2KHR(
m_device->adapter()->handle(), &surfaceInfo, &caps)))
return status;
compatibleModes.resize(compatibleModeInfo.presentModeCount);
compatibleModeInfo.pPresentModes = compatibleModes.data();
if ((status = m_vki->vkGetPhysicalDeviceSurfaceCapabilities2KHR(
m_device->adapter()->handle(), &surfaceInfo, &caps)))
return status;
// Remove modes we don't need for the purpose of finding the minimum
// image count, as well as for swap chain creation later.
compatibleModes.erase(std::remove_if(compatibleModes.begin(), compatibleModes.end(),
[&dynamicModes] (VkPresentModeKHR mode) {
return std::find(dynamicModes.begin(), dynamicModes.end(), mode) == dynamicModes.end();
}), compatibleModes.end());
minImageCount = 0;
caps.pNext = nullptr;
for (auto mode : compatibleModes) {
presentModeInfo.presentMode = mode;
if ((status = m_vki->vkGetPhysicalDeviceSurfaceCapabilities2KHR(
m_device->adapter()->handle(), &surfaceInfo, &caps)))
return status;
minImageCount = std::max(minImageCount, caps.surfaceCapabilities.minImageCount);
if (caps.surfaceCapabilities.maxImageCount) {
maxImageCount = maxImageCount
? std::min(maxImageCount, caps.surfaceCapabilities.maxImageCount)
: caps.surfaceCapabilities.maxImageCount;
}
}
// If any required mode is not supported for dynamic present
// mode switching, clear the dynamic mode array.
for (auto mode : dynamicModes) {
if (std::find(compatibleModes.begin(), compatibleModes.end(), mode) == compatibleModes.end()) {
dynamicModes.clear();
break;
}
}
} else if (dynamicModes[0] != dynamicModes[1]) {
// If we can't switch modes dynamically, clear the
// array so that setSyncInterval errors out properly.
dynamicModes.clear();
}
// Compute swap chain image count based on available info
m_info.imageCount = pickImageCount(minImageCount, maxImageCount, desc.imageCount);
VkSurfaceFullScreenExclusiveInfoEXT fullScreenInfo = { VK_STRUCTURE_TYPE_SURFACE_FULL_SCREEN_EXCLUSIVE_INFO_EXT };
fullScreenInfo.fullScreenExclusive = desc.fullScreenExclusive;
VkSwapchainPresentModesCreateInfoEXT modeInfo = { VK_STRUCTURE_TYPE_SWAPCHAIN_PRESENT_MODES_CREATE_INFO_EXT };
modeInfo.presentModeCount = compatibleModes.size();
modeInfo.pPresentModes = compatibleModes.data();
VkSwapchainCreateInfoKHR swapInfo = { VK_STRUCTURE_TYPE_SWAPCHAIN_CREATE_INFO_KHR };
swapInfo.surface = m_surface;
swapInfo.minImageCount = m_info.imageCount;
swapInfo.imageFormat = m_info.format.format;
swapInfo.imageColorSpace = m_info.format.colorSpace;
swapInfo.imageExtent = m_info.imageExtent;
swapInfo.imageArrayLayers = 1;
swapInfo.imageUsage = VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT
| VK_IMAGE_USAGE_TRANSFER_DST_BIT;
swapInfo.imageSharingMode = VK_SHARING_MODE_EXCLUSIVE;
swapInfo.preTransform = VK_SURFACE_TRANSFORM_IDENTITY_BIT_KHR;
swapInfo.compositeAlpha = VK_COMPOSITE_ALPHA_OPAQUE_BIT_KHR;
swapInfo.presentMode = m_info.presentMode;
swapInfo.clipped = VK_TRUE;
if (m_device->features().extFullScreenExclusive)
fullScreenInfo.pNext = const_cast<void*>(std::exchange(swapInfo.pNext, &fullScreenInfo));
if (m_device->features().extSwapchainMaintenance1.swapchainMaintenance1)
modeInfo.pNext = std::exchange(swapInfo.pNext, &modeInfo);
Logger::info(str::format(
"Presenter: Actual swap chain properties:"
"\n Format: ", m_info.format.format,
"\n Color space: ", m_info.format.colorSpace,
"\n Present mode: ", m_info.presentMode, " (dynamic: ", (dynamicModes.empty() ? "no)" : "yes)"),
"\n Buffer size: ", m_info.imageExtent.width, "x", m_info.imageExtent.height,
"\n Image count: ", m_info.imageCount,
"\n Exclusive FS: ", desc.fullScreenExclusive));
if ((status = m_vkd->vkCreateSwapchainKHR(m_vkd->device(),
&swapInfo, nullptr, &m_swapchain)))
return status;
// Acquire images and create views
std::vector<VkImage> images;
if ((status = getSwapImages(images)))
return status;
// Update actual image count
m_info.imageCount = images.size();
m_images.resize(m_info.imageCount);
for (uint32_t i = 0; i < m_info.imageCount; i++) {
m_images[i].image = images[i];
VkImageViewCreateInfo viewInfo = { VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO };
viewInfo.image = images[i];
viewInfo.viewType = VK_IMAGE_VIEW_TYPE_2D;
viewInfo.format = m_info.format.format;
viewInfo.components = VkComponentMapping {
VK_COMPONENT_SWIZZLE_IDENTITY, VK_COMPONENT_SWIZZLE_IDENTITY,
VK_COMPONENT_SWIZZLE_IDENTITY, VK_COMPONENT_SWIZZLE_IDENTITY };
viewInfo.subresourceRange = {
VK_IMAGE_ASPECT_COLOR_BIT,
0, 1, 0, 1 };
if ((status = m_vkd->vkCreateImageView(m_vkd->device(),
&viewInfo, nullptr, &m_images[i].view)))
return status;
}
// Create one set of semaphores per swap image
m_semaphores.resize(m_info.imageCount);
for (uint32_t i = 0; i < m_semaphores.size(); i++) {
VkSemaphoreCreateInfo semInfo = { VK_STRUCTURE_TYPE_SEMAPHORE_CREATE_INFO };
if ((status = m_vkd->vkCreateSemaphore(m_vkd->device(),
&semInfo, nullptr, &m_semaphores[i].acquire)))
return status;
if ((status = m_vkd->vkCreateSemaphore(m_vkd->device(),
&semInfo, nullptr, &m_semaphores[i].present)))
return status;
}
// Invalidate indices
m_imageIndex = 0;
m_frameIndex = 0;
m_acquireStatus = VK_NOT_READY;
m_dynamicModes = std::move(dynamicModes);
return VK_SUCCESS;
}
bool Presenter::supportsColorSpace(VkColorSpaceKHR colorspace) {
if (!m_surface)
return false;
std::vector<VkSurfaceFormatKHR> surfaceFormats;
getSupportedFormats(surfaceFormats, VK_FULL_SCREEN_EXCLUSIVE_DEFAULT_EXT);
for (const auto& surfaceFormat : surfaceFormats) {
if (surfaceFormat.colorSpace == colorspace)
return true;
}
return false;
}
VkResult Presenter::setSyncInterval(uint32_t syncInterval) {
// Normalize sync interval for present modes. We currently
// cannot support anything other than 1 natively anyway.
syncInterval = std::min(syncInterval, 1u);
if (syncInterval == m_info.syncInterval)
return VK_SUCCESS;
m_info.syncInterval = syncInterval;
if (syncInterval >= m_dynamicModes.size())
return VK_ERROR_OUT_OF_DATE_KHR;
m_info.presentMode = m_dynamicModes[syncInterval];
return VK_SUCCESS;
}
void Presenter::setFrameRateLimit(double frameRate) {
m_fpsLimiter.setTargetFrameRate(frameRate);
}
void Presenter::setHdrMetadata(const VkHdrMetadataEXT& hdrMetadata) {
if (m_device->features().extHdrMetadata)
m_vkd->vkSetHdrMetadataEXT(m_vkd->device(), 1, &m_swapchain, &hdrMetadata);
}
VkResult Presenter::getSupportedFormats(std::vector<VkSurfaceFormatKHR>& formats, VkFullScreenExclusiveEXT fullScreenExclusive) const {
uint32_t numFormats = 0;
VkSurfaceFullScreenExclusiveInfoEXT fullScreenInfo = { VK_STRUCTURE_TYPE_SURFACE_FULL_SCREEN_EXCLUSIVE_INFO_EXT };
fullScreenInfo.fullScreenExclusive = fullScreenExclusive;
VkPhysicalDeviceSurfaceInfo2KHR surfaceInfo = { VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SURFACE_INFO_2_KHR, &fullScreenInfo };
surfaceInfo.surface = m_surface;
VkResult status;
if (m_device->features().extFullScreenExclusive) {
status = m_vki->vkGetPhysicalDeviceSurfaceFormats2KHR(
m_device->adapter()->handle(), &surfaceInfo, &numFormats, nullptr);
} else {
status = m_vki->vkGetPhysicalDeviceSurfaceFormatsKHR(
m_device->adapter()->handle(), m_surface, &numFormats, nullptr);
}
if (status != VK_SUCCESS)
return status;
formats.resize(numFormats);
if (m_device->features().extFullScreenExclusive) {
std::vector<VkSurfaceFormat2KHR> tmpFormats(numFormats,
{ VK_STRUCTURE_TYPE_SURFACE_FORMAT_2_KHR, nullptr, VkSurfaceFormatKHR() });
status = m_vki->vkGetPhysicalDeviceSurfaceFormats2KHR(
m_device->adapter()->handle(), &surfaceInfo, &numFormats, tmpFormats.data());
for (uint32_t i = 0; i < numFormats; i++)
formats[i] = tmpFormats[i].surfaceFormat;
} else {
status = m_vki->vkGetPhysicalDeviceSurfaceFormatsKHR(
m_device->adapter()->handle(), m_surface, &numFormats, formats.data());
}
return status;
}
VkResult Presenter::getSupportedPresentModes(std::vector<VkPresentModeKHR>& modes, VkFullScreenExclusiveEXT fullScreenExclusive) const {
uint32_t numModes = 0;
VkSurfaceFullScreenExclusiveInfoEXT fullScreenInfo = { VK_STRUCTURE_TYPE_SURFACE_FULL_SCREEN_EXCLUSIVE_INFO_EXT };
fullScreenInfo.fullScreenExclusive = fullScreenExclusive;
VkPhysicalDeviceSurfaceInfo2KHR surfaceInfo = { VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SURFACE_INFO_2_KHR, &fullScreenInfo };
surfaceInfo.surface = m_surface;
VkResult status;
if (m_device->features().extFullScreenExclusive) {
status = m_vki->vkGetPhysicalDeviceSurfacePresentModes2EXT(
m_device->adapter()->handle(), &surfaceInfo, &numModes, nullptr);
} else {
status = m_vki->vkGetPhysicalDeviceSurfacePresentModesKHR(
m_device->adapter()->handle(), m_surface, &numModes, nullptr);
}
if (status != VK_SUCCESS)
return status;
modes.resize(numModes);
if (m_device->features().extFullScreenExclusive) {
status = m_vki->vkGetPhysicalDeviceSurfacePresentModes2EXT(
m_device->adapter()->handle(), &surfaceInfo, &numModes, modes.data());
} else {
status = m_vki->vkGetPhysicalDeviceSurfacePresentModesKHR(
m_device->adapter()->handle(), m_surface, &numModes, modes.data());
}
return status;
}
VkResult Presenter::getSwapImages(std::vector<VkImage>& images) {
uint32_t imageCount = 0;
VkResult status = m_vkd->vkGetSwapchainImagesKHR(
m_vkd->device(), m_swapchain, &imageCount, nullptr);
if (status != VK_SUCCESS)
return status;
images.resize(imageCount);
return m_vkd->vkGetSwapchainImagesKHR(
m_vkd->device(), m_swapchain, &imageCount, images.data());
}
VkSurfaceFormatKHR Presenter::pickFormat(
uint32_t numSupported,
const VkSurfaceFormatKHR* pSupported,
uint32_t numDesired,
const VkSurfaceFormatKHR* pDesired) {
if (numDesired > 0) {
// If the implementation allows us to freely choose
// the format, we'll just use the preferred format.
if (numSupported == 1 && pSupported[0].format == VK_FORMAT_UNDEFINED)
return pDesired[0];
// If the preferred format is explicitly listed in
// the array of supported surface formats, use it
for (uint32_t i = 0; i < numDesired; i++) {
for (uint32_t j = 0; j < numSupported; j++) {
if (pSupported[j].format == pDesired[i].format
&& pSupported[j].colorSpace == pDesired[i].colorSpace)
return pSupported[j];
}
}
// If that didn't work, we'll fall back to a format
// which has similar properties to the preferred one
DxvkFormatFlags prefFlags = lookupFormatInfo(pDesired[0].format)->flags;
for (uint32_t j = 0; j < numSupported; j++) {
auto currFlags = lookupFormatInfo(pSupported[j].format)->flags;
if ((currFlags & DxvkFormatFlag::ColorSpaceSrgb)
== (prefFlags & DxvkFormatFlag::ColorSpaceSrgb))
return pSupported[j];
}
}
// Otherwise, fall back to the first supported format
return pSupported[0];
}
VkPresentModeKHR Presenter::pickPresentMode(
uint32_t numSupported,
const VkPresentModeKHR* pSupported,
uint32_t syncInterval) {
std::array<VkPresentModeKHR, 2> desired = { };
uint32_t numDesired = 0;
Tristate tearFree = m_device->config().tearFree;
if (!syncInterval) {
if (tearFree != Tristate::True)
desired[numDesired++] = VK_PRESENT_MODE_IMMEDIATE_KHR;
desired[numDesired++] = VK_PRESENT_MODE_MAILBOX_KHR;
} else {
if (tearFree == Tristate::False)
desired[numDesired++] = VK_PRESENT_MODE_FIFO_RELAXED_KHR;
}
// Just pick the first desired and supported mode
for (uint32_t i = 0; i < numDesired; i++) {
for (uint32_t j = 0; j < numSupported; j++) {
if (pSupported[j] == desired[i])
return pSupported[j];
}
}
// Guaranteed to be available
return VK_PRESENT_MODE_FIFO_KHR;
}
VkExtent2D Presenter::pickImageExtent(
const VkSurfaceCapabilitiesKHR& caps,
VkExtent2D desired) {
if (caps.currentExtent.width != std::numeric_limits<uint32_t>::max())
return caps.currentExtent;
VkExtent2D actual;
actual.width = clamp(desired.width, caps.minImageExtent.width, caps.maxImageExtent.width);
actual.height = clamp(desired.height, caps.minImageExtent.height, caps.maxImageExtent.height);
return actual;
}
uint32_t Presenter::pickImageCount(
uint32_t minImageCount,
uint32_t maxImageCount,
uint32_t desired) {
uint32_t count = minImageCount + 1;
if (count < desired)
count = desired;
if (count > maxImageCount && maxImageCount != 0)
count = maxImageCount;
return count;
}
void Presenter::destroySwapchain() {
if (m_signal != nullptr)
m_signal->wait(m_lastFrameId.load(std::memory_order_acquire));
for (const auto& img : m_images)
m_vkd->vkDestroyImageView(m_vkd->device(), img.view, nullptr);
for (const auto& sem : m_semaphores) {
m_vkd->vkDestroySemaphore(m_vkd->device(), sem.acquire, nullptr);
m_vkd->vkDestroySemaphore(m_vkd->device(), sem.present, nullptr);
}
m_vkd->vkDestroySwapchainKHR(m_vkd->device(), m_swapchain, nullptr);
m_images.clear();
m_semaphores.clear();
m_dynamicModes.clear();
m_swapchain = VK_NULL_HANDLE;
}
void Presenter::destroySurface() {
m_vki->vkDestroySurfaceKHR(m_vki->instance(), m_surface, nullptr);
m_surface = VK_NULL_HANDLE;
}
void Presenter::applyFrameRateLimit(VkPresentModeKHR mode) {
bool vsync = mode == VK_PRESENT_MODE_FIFO_KHR
|| mode == VK_PRESENT_MODE_FIFO_RELAXED_KHR;
m_fpsLimiter.delay(vsync);
}
void Presenter::runFrameThread() {
env::setThreadName("dxvk-frame");
while (true) {
std::unique_lock<dxvk::mutex> lock(m_frameMutex);
m_frameCond.wait(lock, [this] {
return !m_frameQueue.empty();
});
PresenterFrame frame = m_frameQueue.front();
m_frameQueue.pop();
lock.unlock();
// Use a frame ID of 0 as an exit condition
if (!frame.frameId)
return;
// Apply the FPS limiter before signaling the frame event in
// order to reduce latency if the app uses it for frame pacing.
applyFrameRateLimit(frame.mode);
// If the present operation has succeeded, actually wait for it to complete.
// Don't bother with it on MAILBOX / IMMEDIATE modes since doing so would
// restrict us to the display refresh rate on some platforms (XWayland).
if (frame.result >= 0 && (frame.mode == VK_PRESENT_MODE_FIFO_KHR || frame.mode == VK_PRESENT_MODE_FIFO_RELAXED_KHR)) {
VkResult vr = m_vkd->vkWaitForPresentKHR(m_vkd->device(),
m_swapchain, frame.frameId, std::numeric_limits<uint64_t>::max());
if (vr < 0 && vr != VK_ERROR_OUT_OF_DATE_KHR && vr != VK_ERROR_SURFACE_LOST_KHR)
Logger::err(str::format("Presenter: vkWaitForPresentKHR failed: ", vr));
}
// Always signal even on error, since failures here
// are transparent to the front-end.
m_signal->signal(frame.frameId);
}
}
}