From: Mikko Rasa <tdb@tdb.fi>
Date: Sun, 12 Dec 2021 11:01:15 +0000 (+0200)
Subject: Add an option for enabling geometry shaders on Vulkan
X-Git-Url: http://git.tdb.fi/?p=libs%2Fgui.git;a=commitdiff_plain;h=235af0c1148e6dbce927e56846e851564bd083e8

Add an option for enabling geometry shaders on Vulkan
---

diff --git a/source/graphics/vkxlib/vulkancontext.cpp b/source/graphics/vkxlib/vulkancontext.cpp
index 34c0c51..8e253e1 100644
--- a/source/graphics/vkxlib/vulkancontext.cpp
+++ b/source/graphics/vkxlib/vulkancontext.cpp
@@ -62,7 +62,8 @@ string vulkan_error::get_error_message(unsigned code)
 
 VulkanOptions::VulkanOptions():
 	enable_validation(false),
-	enable_debug_report(false)
+	enable_debug_report(false),
+	enable_geometry_shader(false)
 { }
 
 
@@ -193,12 +194,16 @@ void VulkanContext::platform_init(const VulkanOptions &opts)
 		extensions.clear();
 		extensions.push_back("VK_KHR_swapchain");
 
+		VkPhysicalDeviceFeatures features = { };
+		features.geometryShader = (opts.enable_geometry_shader ? VK_TRUE : VK_FALSE);
+
 		VkDeviceCreateInfo device_create_info = { };
 		device_create_info.sType = VK_STRUCTURE_TYPE_DEVICE_CREATE_INFO;
 		device_create_info.queueCreateInfoCount = 1;
 		device_create_info.pQueueCreateInfos = &queue_create_info;
 		device_create_info.enabledExtensionCount = extensions.size();
 		device_create_info.ppEnabledExtensionNames = extensions.data();
+		device_create_info.pEnabledFeatures = &features;
 
 		result = f.vkCreateDevice(priv->physical_device, &device_create_info, 0, &priv->device);
 		if(result!=VK_SUCCESS)
diff --git a/source/graphics/vulkancontext.h b/source/graphics/vulkancontext.h
index 44ac4a5..f80f5cb 100644
--- a/source/graphics/vulkancontext.h
+++ b/source/graphics/vulkancontext.h
@@ -24,6 +24,7 @@ struct VulkanOptions
 {
 	bool enable_validation;
 	bool enable_debug_report;
+	bool enable_geometry_shader;
 
 	VulkanOptions();
 };