[gtk+/wip/otte/vulkan: 44/62] vulkan: Also wait on the draw semaphore when present()ing

[Benjamin Otte <otte src gnome org>]

commit 747df7aa3cc1cc3d97edd0d097556d4d79116f9e
Author: Benjamin Otte <otte redhat com>
Date:   Thu Dec 8 17:40:07 2016 +0100

    vulkan: Also wait on the draw semaphore when present()ing
    
    That way we have a synchronization primitive at the start and at the
    end.

 gdk/gdkvulkancontext.c |    4 ++++
 gsk/gskvulkanrender.c  |    6 +++++-
 2 files changed, 9 insertions(+), 1 deletions(-)
---
diff --git a/gdk/gdkvulkancontext.c b/gdk/gdkvulkancontext.c
index f0af29b..399cd98 100644
--- a/gdk/gdkvulkancontext.c
+++ b/gdk/gdkvulkancontext.c
@@ -306,6 +306,10 @@ gdk_vulkan_context_end_frame (GdkDrawContext *draw_context,
   GDK_VK_CHECK (vkQueuePresentKHR, gdk_vulkan_context_get_queue (context),
                                    &(VkPresentInfoKHR) {
                                        .sType = VK_STRUCTURE_TYPE_PRESENT_INFO_KHR,
+                                       .waitSemaphoreCount = 1,
+                                       .pWaitSemaphores = (VkSemaphore[]) {
+                                           priv->draw_semaphore
+                                       },
                                        .swapchainCount = 1,
                                        .pSwapchains = (VkSwapchainKHR[]) { 
                                            priv->swapchain
diff --git a/gsk/gskvulkanrender.c b/gsk/gskvulkanrender.c
index c57e701..8fd9160 100644
--- a/gsk/gskvulkanrender.c
+++ b/gsk/gskvulkanrender.c
@@ -237,13 +237,17 @@ gsk_vulkan_render_submit (GskVulkanRender *self,
                                   .sType = VK_STRUCTURE_TYPE_SUBMIT_INFO,
                                   .waitSemaphoreCount = 1,
                                   .pWaitSemaphores = (VkSemaphore[1]) {
-                                      gdk_vulkan_context_get_draw_semaphore (self->vulkan),
+                                      gdk_vulkan_context_get_draw_semaphore (self->vulkan)
                                   },
                                   .pWaitDstStageMask = (VkPipelineStageFlags []) {
                                      VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT,
                                   },
                                   .commandBufferCount = 1,
                                   .pCommandBuffers = &self->command_buffer,
+                                  .signalSemaphoreCount = 1,
+                                  .pSignalSemaphores = (VkSemaphore[1]) {
+                                      gdk_vulkan_context_get_draw_semaphore (self->vulkan)
+                                  }
                                },
                                fence);