cube: Add subpass dependencies

Shared depth buffer and image layout transition both
need to be accounted for

Change-Id: Id26bc47798c58e4435a5585def3161105b7fffd1

1 files changed, 31 insertions, 5 deletions

diff --git a/cube/cube.c b/cube/cube.c
index 1d210342..644f3df4 100644
--- a/cube/cube.c
+++ b/cube/cube.c
@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 2015-2016 The Khronos Group Inc.
- * Copyright (c) 2015-2016 Valve Corporation
- * Copyright (c) 2015-2016 LunarG, Inc.
+ * Copyright (c) 2015-2019 The Khronos Group Inc.
+ * Copyright (c) 2015-2019 Valve Corporation
+ * Copyright (c) 2015-2019 LunarG, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -1892,6 +1892,32 @@ static void demo_prepare_render_pass(struct demo *demo) {
         .preserveAttachmentCount = 0,
         .pPreserveAttachments = NULL,
     };
+
+    VkSubpassDependency attachmentDependencies[2] = {
+        [0] =
+            {
+                // Depth buffer is shared between swapchain images
+                .srcSubpass = VK_SUBPASS_EXTERNAL,
+                .dstSubpass = 0,
+                .srcStageMask = VK_PIPELINE_STAGE_EARLY_FRAGMENT_TESTS_BIT | VK_PIPELINE_STAGE_LATE_FRAGMENT_TESTS_BIT,
+                .dstStageMask = VK_PIPELINE_STAGE_EARLY_FRAGMENT_TESTS_BIT | VK_PIPELINE_STAGE_LATE_FRAGMENT_TESTS_BIT,
+                .srcAccessMask = VK_ACCESS_DEPTH_STENCIL_ATTACHMENT_WRITE_BIT,
+                .dstAccessMask = VK_ACCESS_DEPTH_STENCIL_ATTACHMENT_READ_BIT | VK_ACCESS_DEPTH_STENCIL_ATTACHMENT_WRITE_BIT,
+                .dependencyFlags = 0,
+            },
+        [1] =
+            {
+                // Image Layout Transition
+                .srcSubpass = VK_SUBPASS_EXTERNAL,
+                .dstSubpass = 0,
+                .srcStageMask = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT,
+                .dstStageMask = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT,
+                .srcAccessMask = 0,
+                .dstAccessMask = VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT | VK_ACCESS_COLOR_ATTACHMENT_READ_BIT,
+                .dependencyFlags = 0,
+            },
+    };
+
     const VkRenderPassCreateInfo rp_info = {
         .sType = VK_STRUCTURE_TYPE_RENDER_PASS_CREATE_INFO,
         .pNext = NULL,
@@ -1900,8 +1926,8 @@ static void demo_prepare_render_pass(struct demo *demo) {
         .pAttachments = attachments,
         .subpassCount = 1,
         .pSubpasses = &subpass,
-        .dependencyCount = 0,
-        .pDependencies = NULL,
+        .dependencyCount = 2,
+        .pDependencies = attachmentDependencies,
     };
     VkResult U_ASSERT_ONLY err;