zdoom/qzdoom
0
0
Fork 0
mirror of https://github.com/ZDoom/qzdoom.git synced 2025-01-18 15:11:46 +00:00
Code Issues Projects Releases Packages Wiki Activity

- this should be better for when vsync is off if I read the vulkan spec correctly

Browse source
This commit is contained in:
Magnus Norddahl 2019-04-30 19:26:28 +02:00
parent dffe45835d
commit 34a8e9050b
1 changed files with 6 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

7
src/rendering/vulkan/system/vk_swapchain.cpp
View file

@ -158,7 +158,12 @@ bool VulkanSwapChain::CreateSwapChain(VkSwapchainKHR oldSwapChain)
if (surfaceCapabilities.maxImageCount > 0 && imageCount > surfaceCapabilities.maxImageCount)
imageCount = surfaceCapabilities.maxImageCount;
imageCount = std::min(imageCount, (uint32_t)2); // Only use two buffers (triple buffering sucks! good for benchmarks, bad for mouse input)
// When vsync is on we only want two images. This creates a slight performance penalty in exchange for reduced input latency (less mouse lag).
// When vsync is off we want three images as it allows us to generate new images even during the vertical blanking period where one entry is being used by the presentation engine.
if (swapChainPresentMode == VK_PRESENT_MODE_MAILBOX_KHR || swapChainPresentMode == VK_PRESENT_MODE_IMMEDIATE_KHR)
imageCount = std::min(imageCount, (uint32_t)3);
else
imageCount = std::min(imageCount, (uint32_t)2);
VkSwapchainCreateInfoKHR swapChainCreateInfo = {};
swapChainCreateInfo.sType = VK_STRUCTURE_TYPE_SWAPCHAIN_CREATE_INFO_KHR;