+static bool
+wsi_swapchain_is_present_mode_supported(struct wsi_device *wsi,
+ const VkSwapchainCreateInfoKHR *pCreateInfo,
+ VkPresentModeKHR mode)
+{
+ ICD_FROM_HANDLE(VkIcdSurfaceBase, surface, pCreateInfo->surface);
+ struct wsi_interface *iface = wsi->wsi[surface->platform];
+ VkPresentModeKHR *present_modes;
+ uint32_t present_mode_count;
+ bool supported = false;
+ VkResult result;
+
+ result = iface->get_present_modes(surface, &present_mode_count, NULL);
+ if (result != VK_SUCCESS)
+ return supported;
+
+ present_modes = malloc(present_mode_count * sizeof(*present_modes));
+ if (!present_modes)
+ return supported;
+
+ result = iface->get_present_modes(surface, &present_mode_count,
+ present_modes);
+ if (result != VK_SUCCESS)
+ goto fail;
+
+ for (uint32_t i = 0; i < present_mode_count; i++) {
+ if (present_modes[i] == mode) {
+ supported = true;
+ break;
+ }
+ }
+
+fail:
+ free(present_modes);
+ return supported;
+}
+
+enum VkPresentModeKHR
+wsi_swapchain_get_present_mode(struct wsi_device *wsi,
+ const VkSwapchainCreateInfoKHR *pCreateInfo)
+{
+ if (wsi->override_present_mode == VK_PRESENT_MODE_MAX_ENUM_KHR)
+ return pCreateInfo->presentMode;
+
+ if (!wsi_swapchain_is_present_mode_supported(wsi, pCreateInfo,
+ wsi->override_present_mode)) {
+ fprintf(stderr, "Unsupported MESA_VK_WSI_PRESENT_MODE value!\n");
+ return pCreateInfo->presentMode;
+ }
+
+ return wsi->override_present_mode;
+}
+