Actually pay attention to the vsync flag passed into choose_swap_mode

1 files changed, 10 insertions, 3 deletions

diff --git a/video.cpp b/video.cpp
index 8203eea..a0bbc2c 100644
--- a/video.cpp
+++ b/video.cpp
@@ -1895,8 +1895,15 @@ static VkSurfaceFormatKHR choose_swap_format(const Swap_Cap& cap) {
 }
 
 static VkPresentModeKHR choose_swap_mode(const Swap_Cap& cap, bool vsync) {
-	(void)vsync;
-	(void)cap; /* todo */
+	if (!vsync) {
+		int i, c = cap.pm_count;
+		for (i = 0; i < c; i++)
+			if (cap.pms[i] == VK_PRESENT_MODE_IMMEDIATE_KHR)
+				return cap.pms[i];
+		for (i = 0; i < c; i++)
+			if (cap.pms[i] == VK_PRESENT_MODE_MAILBOX_KHR)
+				return cap.pms[i];
+	}
 	return VK_PRESENT_MODE_FIFO_KHR;
 }
 
@@ -1937,7 +1944,7 @@ void Swapchain::initr(const App& app, Device_Vk* dev) {
 	image_count = get_image_count(dev->swap_cap);
 	size = choose_swap_extent(app, dev->swap_cap.cap);
 	format = choose_swap_format(dev->swap_cap);
-	mode = choose_swap_mode(dev->swap_cap, false);
+	mode = choose_swap_mode(dev->swap_cap, true);
 	{
 		VkResult r;
 		VkSwapchainCreateInfoKHR si{};