From f1fe33f37ff9dc603c7d493ac299f85117bc6f0b Mon Sep 17 00:00:00 2001
From: saschawillems <webmaster@saschawillems.de>
Date: Wed, 10 Aug 2016 20:55:12 +0200
Subject: [PATCH] Fence for text overlay command buffer submission

---
 base/vulkantextoverlay.hpp | 12 +++++++++---
 base/vulkantools.h         |  2 +-
 2 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/base/vulkantextoverlay.hpp b/base/vulkantextoverlay.hpp
index 107524f1..7aecd00c 100644
--- a/base/vulkantextoverlay.hpp
+++ b/base/vulkantextoverlay.hpp
@@ -66,6 +66,7 @@ private:
 	VkCommandPool commandPool;
 	std::vector<VkFramebuffer*> frameBuffers;
 	std::vector<VkPipelineShaderStageCreateInfo> shaderStages;
+	VkFence fence;
 
 	// Used during text updates
 	glm::vec4 *mappedLocal = nullptr;
@@ -138,7 +139,7 @@ public:
 		vkDestroyRenderPass(vulkanDevice->logicalDevice, renderPass, nullptr);
 		vkFreeCommandBuffers(vulkanDevice->logicalDevice, commandPool, static_cast<uint32_t>(cmdBuffers.size()), cmdBuffers.data());
 		vkDestroyCommandPool(vulkanDevice->logicalDevice, commandPool, nullptr);
-		vkDestroyFence(vulkanDevice->logicalDevice, waitFence, nullptr);
+		vkDestroyFence(vulkanDevice->logicalDevice, fence, nullptr);
 	}
 
 	/**
@@ -346,6 +347,10 @@ public:
 		VkPipelineCacheCreateInfo pipelineCacheCreateInfo = {};
 		pipelineCacheCreateInfo.sType = VK_STRUCTURE_TYPE_PIPELINE_CACHE_CREATE_INFO;
 		VK_CHECK_RESULT(vkCreatePipelineCache(vulkanDevice->logicalDevice, &pipelineCacheCreateInfo, nullptr, &pipelineCache));
+
+		// Command buffer execution fence
+		VkFenceCreateInfo fenceCreateInfo = vkTools::initializers::fenceCreateInfo();
+		VK_CHECK_RESULT(vkCreateFence(vulkanDevice->logicalDevice, &fenceCreateInfo, nullptr, &fence));
 	}
 
 	/**
@@ -688,9 +693,10 @@ public:
 		submitInfo.pCommandBuffers = &cmdBuffers[bufferindex];
 		submitInfo.commandBufferCount = 1;
 
-		VK_CHECK_RESULT(vkQueueSubmit(queue, 1, &submitInfo, VK_NULL_HANDLE));
+		VK_CHECK_RESULT(vkQueueSubmit(queue, 1, &submitInfo, fence));
 
-		//todo: fence
+		VK_CHECK_RESULT(vkWaitForFences(vulkanDevice->logicalDevice, 1, &fence, VK_TRUE, UINT64_MAX));
+		VK_CHECK_RESULT(vkResetFences(vulkanDevice->logicalDevice, 1, &fence));
 	}
 
 	/**
diff --git a/base/vulkantools.h b/base/vulkantools.h
index 6953e867..0506488c 100644
--- a/base/vulkantools.h
+++ b/base/vulkantools.h
@@ -145,7 +145,7 @@ namespace vkTools
 		VkFramebufferCreateInfo framebufferCreateInfo();
 
 		VkSemaphoreCreateInfo semaphoreCreateInfo();
-		VkFenceCreateInfo fenceCreateInfo(VkFenceCreateFlags flags);
+		VkFenceCreateInfo fenceCreateInfo(VkFenceCreateFlags flags = VK_FLAGS_NONE);
 		VkEventCreateInfo eventCreateInfo();
 
 		VkSubmitInfo submitInfo();