[gtk/fix-vulkan-context-creation: 1/2] vulkan: Fix swapchain creation

[Matthias Clasen <matthiasc src gnome org>]

commit b9d4654fcaeb0313845f221135f4236c24ad2248
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Sep 10 13:55:16 2020 -0400

    vulkan: Fix swapchain creation
    
    We end up with a surface that has size 0x0 at the
    time we create the Vulkan context, and that is a
    size that Vulkan doesn't like, so ensure we request
    at least 1x1.
    
    Fixes: #3147

 gdk/gdkvulkancontext.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/gdk/gdkvulkancontext.c b/gdk/gdkvulkancontext.c
index d4c36a7cd0..917b443f94 100644
--- a/gdk/gdkvulkancontext.c
+++ b/gdk/gdkvulkancontext.c
@@ -324,13 +324,13 @@ gdk_vulkan_context_check_swapchain (GdkVulkanContext  *context,
 
   /*
    * Per 
https://www.khronos.org/registry/vulkan/specs/1.0-wsi_extensions/xhtml/vkspec.html#VkSurfaceCapabilitiesKHR
-   * the current extent may assume a special value, meaning that the extend should assume whatever
+   * the current extent may assume a special value, meaning that the extent should assume whatever
    * value the surface has.
    */
   if (capabilities.currentExtent.width == -1 || capabilities.currentExtent.height == -1)
     {
-      capabilities.currentExtent.width = gdk_surface_get_width (surface) * gdk_surface_get_scale_factor 
(surface);
-      capabilities.currentExtent.height = gdk_surface_get_height (surface) * gdk_surface_get_scale_factor 
(surface);
+      capabilities.currentExtent.width = MAX (1, gdk_surface_get_width (surface) * 
gdk_surface_get_scale_factor (surface));
+      capabilities.currentExtent.height = MAX (1, gdk_surface_get_height (surface) * 
gdk_surface_get_scale_factor (surface));
     }
 
   res = GDK_VK_CHECK (vkCreateSwapchainKHR, device,