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Updated swapchain image count selection algorithm.

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The previous version was correct from Vulkan spec standpoint but due to bug in AMD drivers we can not
safely use surface_caps.minImageCount for the number of images in the swapchain for fullscreen window.
Now we request at least 2 images for immediate and fifo mode.
This commit is contained in:
Artem Kharytoniuk 2017-12-31 13:13:44 +01:00
parent c30a4b867f
commit abe1efe3aa
1 changed files with 6 additions and 8 deletions
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12
src/engine/renderer/vk.cpp
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@ -198,16 +198,14 @@ static VkSwapchainKHR create_swapchain(VkPhysicalDevice physical_device, VkDevic
if (mailbox_supported) { if (mailbox_supported) {
present_mode = VK_PRESENT_MODE_MAILBOX_KHR; present_mode = VK_PRESENT_MODE_MAILBOX_KHR;
image_count = std::max(3u, surface_caps.minImageCount); image_count = std::max(3u, surface_caps.minImageCount);
} else {
present_mode = immediate_supported ? VK_PRESENT_MODE_IMMEDIATE_KHR : VK_PRESENT_MODE_FIFO_KHR;
image_count = std::max(2u, surface_caps.minImageCount);
}
if (surface_caps.maxImageCount > 0) { if (surface_caps.maxImageCount > 0) {
image_count = std::min(image_count, surface_caps.maxImageCount); image_count = std::min(image_count, surface_caps.maxImageCount);
} }
} else if (immediate_supported) {
present_mode = VK_PRESENT_MODE_IMMEDIATE_KHR;
image_count = surface_caps.minImageCount;
} else {
present_mode = VK_PRESENT_MODE_FIFO_KHR;
image_count = surface_caps.minImageCount;
}
// create swap chain // create swap chain
VkSwapchainCreateInfoKHR desc; VkSwapchainCreateInfoKHR desc;