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Added support for late swap tearing to the Vulkan renderer

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This commit is contained in:
Sam Lantinga 2024-05-13 14:26:56 -07:00
parent 17520c2e6e
commit 5f1e01cce0
1 changed files with 25 additions and 15 deletions
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40
src/render/vulkan/SDL_render_vulkan.c
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@ -2092,7 +2092,7 @@ static VkResult VULKAN_CreateSwapChain(SDL_Renderer *renderer, int w, int h)
/* 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 (!rendererData->vsync) {
if (rendererData->vsync <= 0) {
uint32_t presentModeCount = 0;
result = vkGetPhysicalDeviceSurfacePresentModesKHR(rendererData->physicalDevice, rendererData->surface, &presentModeCount, NULL);
if (result != VK_SUCCESS) {
@ -2108,21 +2108,30 @@ static VkResult VULKAN_CreateSwapChain(SDL_Renderer *renderer, int w, int h)
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;
if (rendererData->vsync == 0) {
/* 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;
}
}
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;
} else if (rendererData->vsync == -1) {
for (uint32_t i = 0; i < presentModeCount; i++) {
if (presentModes[i] == VK_PRESENT_MODE_FIFO_RELAXED_KHR) {
presentMode = VK_PRESENT_MODE_FIFO_RELAXED_KHR;
break;
}
}
}
SDL_free(presentModes);
@ -4026,6 +4035,7 @@ static int VULKAN_SetVSync(SDL_Renderer *renderer, const int vsync)
VULKAN_RenderData *rendererData = (VULKAN_RenderData *)renderer->driverdata;
switch (vsync) {
case -1:
case 0:
case 1:
/* Supported */