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Vulkan Renderer - implement support for vsync disabled. Closes #9116.

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danginsburg
2024-02-23 08:43:37 -05:00
committed by Sam Lantinga
parent b9a00aa88e
commit b1431e6702
1 changed files with 40 additions and 1 deletions
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41
src/render/vulkan/SDL_render_vulkan.c
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@@ -1912,6 +1912,45 @@ static VkResult VULKAN_CreateSwapChain(SDL_Renderer *renderer, int w, int h)
return VK_ERROR_OUT_OF_DATE_KHR;
}
/* Choose a present mode. If vsync is requested, then use VK_PRESENT_MODE_FIFO_KHR which is guaranteed to be supported */
VkPresentModeKHR presentMode = VK_PRESENT_MODE_FIFO_KHR;
if (!(renderer->info.flags & SDL_RENDERER_PRESENTVSYNC)) {
uint32_t presentModeCount = 0;
result = vkGetPhysicalDeviceSurfacePresentModesKHR(rendererData->physicalDevice, rendererData->surface, &presentModeCount, NULL);
if (result != VK_SUCCESS) {
SDL_LogError(SDL_LOG_CATEGORY_RENDER, "vkGetPhysicalDeviceSurfacePresentModesKHR(): %s\n", SDL_Vulkan_GetResultString(result));
return result;
}
if (presentModeCount > 0) {
VkPresentModeKHR *presentModes = SDL_calloc(sizeof(VkPresentModeKHR), presentModeCount);
result = vkGetPhysicalDeviceSurfacePresentModesKHR(rendererData->physicalDevice, rendererData->surface, &presentModeCount, presentModes);
if (result != VK_SUCCESS) {
SDL_LogError(SDL_LOG_CATEGORY_RENDER, "vkGetPhysicalDeviceSurfacePresentModesKHR(): %s\n", SDL_Vulkan_GetResultString(result));
SDL_free(presentModes);
return result;
}
/* If vsync is not requested, in favor these options in order:
VK_PRESENT_MODE_IMMEDIATE_KHR - no v-sync with tearing
VK_PRESENT_MODE_MAILBOX_KHR - no v-sync without tearing
VK_PRESENT_MODE_FIFO_RELAXED_KHR - no v-sync, may tear */
for (uint32_t i = 0; i < presentModeCount; i++) {
if (presentModes[i] == VK_PRESENT_MODE_IMMEDIATE_KHR) {
presentMode = VK_PRESENT_MODE_IMMEDIATE_KHR;
break;
}
else if (presentModes[i] == VK_PRESENT_MODE_MAILBOX_KHR) {
presentMode = VK_PRESENT_MODE_MAILBOX_KHR;
}
else if ((presentMode != VK_PRESENT_MODE_MAILBOX_KHR) &&
(presentModes[i] == VK_PRESENT_MODE_FIFO_RELAXED_KHR)) {
presentMode = VK_PRESENT_MODE_FIFO_RELAXED_KHR;
}
}
SDL_free(presentModes);
}
}
VkSwapchainCreateInfoKHR swapchainCreateInfo = { 0 };
swapchainCreateInfo.sType = VK_STRUCTURE_TYPE_SWAPCHAIN_CREATE_INFO_KHR;
@@ -1925,7 +1964,7 @@ static VkResult VULKAN_CreateSwapChain(SDL_Renderer *renderer, int w, int h)
swapchainCreateInfo.imageSharingMode = VK_SHARING_MODE_EXCLUSIVE;
swapchainCreateInfo.preTransform = rendererData->surfaceCapabilities.currentTransform;
swapchainCreateInfo.compositeAlpha = VK_COMPOSITE_ALPHA_OPAQUE_BIT_KHR;
swapchainCreateInfo.presentMode = VK_PRESENT_MODE_FIFO_KHR; // TODO
swapchainCreateInfo.presentMode = presentMode;
swapchainCreateInfo.clipped = VK_TRUE;
swapchainCreateInfo.oldSwapchain = rendererData->swapchain;
result = vkCreateSwapchainKHR(rendererData->device, &swapchainCreateInfo, NULL, &rendererData->swapchain);