+
+ uint32_t image_modifier_count = 0, modifier_prop_count = 0;
+ struct wsi_format_modifier_properties *modifier_props = NULL;
+ uint64_t *image_modifiers = NULL;
+ if (num_modifier_lists == 0) {
+ /* If we don't have modifiers, fall back to the legacy "scanout" flag */
+ image_wsi_info.scanout = true;
+ } else {
+ /* The winsys can't request modifiers if we don't support them. */
+ assert(wsi->supports_modifiers);
+ struct wsi_format_modifier_properties_list modifier_props_list = {
+ .sType = VK_STRUCTURE_TYPE_WSI_FORMAT_MODIFIER_PROPERTIES_LIST_MESA,
+ .pNext = NULL,
+ };
+ VkFormatProperties2 format_props = {
+ .sType = VK_STRUCTURE_TYPE_FORMAT_PROPERTIES_2,
+ .pNext = &modifier_props_list,
+ };
+ wsi->GetPhysicalDeviceFormatProperties2KHR(wsi->pdevice,
+ pCreateInfo->imageFormat,
+ &format_props);
+ assert(modifier_props_list.modifier_count > 0);
+ modifier_props = vk_alloc(&chain->alloc,
+ sizeof(*modifier_props) *
+ modifier_props_list.modifier_count,
+ 8,
+ VK_SYSTEM_ALLOCATION_SCOPE_COMMAND);
+ if (!modifier_props) {
+ result = VK_ERROR_OUT_OF_HOST_MEMORY;
+ goto fail;
+ }
+
+ modifier_props_list.modifier_properties = modifier_props;
+ wsi->GetPhysicalDeviceFormatProperties2KHR(wsi->pdevice,
+ pCreateInfo->imageFormat,
+ &format_props);
+ modifier_prop_count = modifier_props_list.modifier_count;
+
+ uint32_t max_modifier_count = 0;
+ for (uint32_t l = 0; l < num_modifier_lists; l++)
+ max_modifier_count = MAX2(max_modifier_count, num_modifiers[l]);
+
+ image_modifiers = vk_alloc(&chain->alloc,
+ sizeof(*image_modifiers) *
+ max_modifier_count,
+ 8,
+ VK_SYSTEM_ALLOCATION_SCOPE_COMMAND);
+ if (!image_modifiers) {
+ result = VK_ERROR_OUT_OF_HOST_MEMORY;
+ goto fail;
+ }
+
+ image_modifier_count = 0;
+ for (uint32_t l = 0; l < num_modifier_lists; l++) {
+ /* Walk the modifier lists and construct a list of supported
+ * modifiers.
+ */
+ for (uint32_t i = 0; i < num_modifiers[l]; i++) {
+ for (uint32_t j = 0; j < modifier_prop_count; j++) {
+ if (modifier_props[j].modifier == modifiers[l][i])
+ image_modifiers[image_modifier_count++] = modifiers[l][i];
+ }
+ }
+
+ /* We only want to take the modifiers from the first list */
+ if (image_modifier_count > 0)
+ break;
+ }
+
+ if (image_modifier_count > 0) {
+ image_wsi_info.modifier_count = image_modifier_count;
+ image_wsi_info.modifiers = image_modifiers;
+ } else {
+ /* TODO: Add a proper error here */
+ assert(!"Failed to find a supported modifier! This should never "
+ "happen because LINEAR should always be available");
+ result = VK_ERROR_OUT_OF_HOST_MEMORY;
+ goto fail;
+ }
+ }
+