[feat]: wire in scene into the simulation engine

1 files changed, 13 insertions, 1 deletions

diff --git a/src/platform/vulkan/vulkan_swapchain.cpp b/src/platform/vulkan/vulkan_swapchain.cpp
index fe5bd38..5bf2f60 100644
--- a/src/platform/vulkan/vulkan_swapchain.cpp
+++ b/src/platform/vulkan/vulkan_swapchain.cpp
@@ -117,7 +117,19 @@ namespace Donut::RHI
         sci.imageExtent = m_extent; sci.imageArrayLayers = 1;
         sci.imageUsage = VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT;
         sci.preTransform = caps.currentTransform; sci.compositeAlpha = VK_COMPOSITE_ALPHA_OPAQUE_BIT_KHR;
-        sci.presentMode = VK_PRESENT_MODE_FIFO_KHR; sci.clipped = VK_TRUE;
+        // FIFO is always available (vsync). With vsync off, prefer IMMEDIATE
+        // (uncapped, may tear) then MAILBOX, if the surface supports them.
+        VkPresentModeKHR present_mode = VK_PRESENT_MODE_FIFO_KHR;
+        if (!m_vsync)
+        {
+            uint32_t pmc = 0; vkGetPhysicalDeviceSurfacePresentModesKHR(m_physical, m_surface, &pmc, nullptr);
+            std::vector<VkPresentModeKHR> modes(pmc);
+            vkGetPhysicalDeviceSurfacePresentModesKHR(m_physical, m_surface, &pmc, modes.data());
+            auto has = [&](VkPresentModeKHR m){ return std::find(modes.begin(), modes.end(), m) != modes.end(); };
+            if (has(VK_PRESENT_MODE_IMMEDIATE_KHR))    present_mode = VK_PRESENT_MODE_IMMEDIATE_KHR;
+            else if (has(VK_PRESENT_MODE_MAILBOX_KHR)) present_mode = VK_PRESENT_MODE_MAILBOX_KHR;
+        }
+        sci.presentMode = present_mode; sci.clipped = VK_TRUE;
         uint32_t fam[2] = { m_graphics_family, m_present_family };
         if (m_graphics_family != m_present_family)
         { sci.imageSharingMode = VK_SHARING_MODE_CONCURRENT; sci.queueFamilyIndexCount = 2; sci.pQueueFamilyIndices = fam; }