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Parameter to force V-Sync at swap chain creation

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saschawillems 2016-06-12 17:13:46 +02:00
parent 5f2a7fc537
commit 8b08d01157
1 changed files with 16 additions and 10 deletions
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10
base/vulkanswapchain.hpp
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@ -235,7 +235,7 @@ public:
} }
// Create the swap chain and get images with given width and height // Create the swap chain and get images with given width and height
void create(VkCommandBuffer cmdBuffer, uint32_t *width, uint32_t *height) void create(VkCommandBuffer cmdBuffer, uint32_t *width, uint32_t *height, VkBool32 vsync = VK_FALSE)
{ {
VkResult err; VkResult err;
VkSwapchainKHR oldSwapchain = swapChain; VkSwapchainKHR oldSwapchain = swapChain;
@ -273,8 +273,14 @@ public:
*height = surfCaps.currentExtent.height; *height = surfCaps.currentExtent.height;
} }
// Prefer mailbox mode if present, it's the lowest latency non-tearing present mode
// Select a present mode for the swapchain
// The VK_PRESENT_MODE_FIFO_KHR mode must always be present as per spec
// This mode waits for the vertical blank ("v-sync")
VkPresentModeKHR swapchainPresentMode = VK_PRESENT_MODE_FIFO_KHR; VkPresentModeKHR swapchainPresentMode = VK_PRESENT_MODE_FIFO_KHR;
// If v-sync is not requested, try to find a mailbox mode if present
// It's the lowest latency non-tearing present mode available
for (size_t i = 0; i < presentModeCount; i++) for (size_t i = 0; i < presentModeCount; i++)
{ {
if (presentModes[i] == VK_PRESENT_MODE_MAILBOX_KHR) if (presentModes[i] == VK_PRESENT_MODE_MAILBOX_KHR)