Respect minImageCount from surface capabilities

renderdoc/driver/vulkan/vk_outputwindow.cpp

@@ -201,6 +201,8 @@ void VulkanReplay::OutputWindow::Create(WrappedVulkan *driver, VkDevice device,
 
   VkResult vkr = VK_SUCCESS;
 
+  uint32_t numImages = 2;
+
   if(m_WindowSystem != WindowingSystem::Headless)
   {
     VkSurfaceCapabilitiesKHR capabilities;
@@ -208,6 +210,9 @@ void VulkanReplay::OutputWindow::Create(WrappedVulkan *driver, VkDevice device,
     ObjDisp(inst)->GetPhysicalDeviceSurfaceCapabilitiesKHR(Unwrap(phys), Unwrap(surface),
                                                            &capabilities);
 
+    if(capabilities.minImageCount < 8)
+      numImages = RDCMAX(numImages, capabilities.minImageCount);
+
     RDCASSERT(capabilities.supportedUsageFlags & VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT);
     // AMD didn't report this capability for a while. If the assert fires for you, update
     // your drivers!
@@ -308,7 +313,7 @@ void VulkanReplay::OutputWindow::Create(WrappedVulkan *driver, VkDevice device,
         NULL,
         0,
         Unwrap(surface),
-        2,
+        numImages,
         imformat,
         imcolspace,
         {width, height},