[gtk+] vulkan: Create required number of swapchain images

[Benjamin Otte <otte src gnome org>]

commit f74490739f1016e5b6696cbf68c8528b0ff00525
Author: Benjamin Otte <otte redhat com>
Date:   Wed Jan 4 18:38:40 2017 +0100

    vulkan: Create required number of swapchain images
    
    Wayland has minImageCount == 4, so us just creating 2 images is not very
    nice. So we don't do that anymore.

 gdk/gdkvulkancontext.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/gdk/gdkvulkancontext.c b/gdk/gdkvulkancontext.c
index dae6a34..c08356b 100644
--- a/gdk/gdkvulkancontext.c
+++ b/gdk/gdkvulkancontext.c
@@ -235,7 +235,9 @@ gdk_vulkan_context_check_swapchain (GdkVulkanContext  *context,
                                                 .pNext = NULL,
                                                 .flags = 0,
                                                 .surface = priv->surface,
-                                                .minImageCount = 2,
+                                                .minImageCount = CLAMP (2,
+                                                                        capabilities.minImageCount,
+                                                                        capabilities.maxImageCount ? 
capabilities.maxImageCount : G_MAXUINT32),
                                                 .imageFormat = priv->image_format.format,
                                                 .imageColorSpace = priv->image_format.colorSpace,
                                                 .imageExtent = capabilities.currentExtent,