Set default queue priorities to 0.5f (#1426)

* Set default queue priorities to 0.0f

* Adjust queue priorities to 0.5f

Author: SaschaWillems

framework/core/device.h

@@ -638,7 +638,7 @@ inline void Device<bindingType>::init(std::unordered_map<const char *, bool> con
 		if (gpu.has_high_priority_graphics_queue() &&
 		    (vkb::common::get_queue_family_index(queue_family_properties, vk::QueueFlagBits::eGraphics) == queue_family_index))
 		{
-			queue_priorities.back()[0] = 1.0f;
+			queue_priorities.back()[0] = 0.5f;
 		}
 
 		queue_create_infos.push_back({.queueFamilyIndex = queue_family_index,

samples/api/hello_triangle/hello_triangle.cpp

@@ -310,7 +310,7 @@ void HelloTriangle::init_device()
 #endif
 
 	// The sample uses a single graphics queue
-	const float queue_priority = 1.0f;
+	const float queue_priority = 0.5f;
 
 	VkDeviceQueueCreateInfo queue_info{
 	    .sType            = VK_STRUCTURE_TYPE_DEVICE_QUEUE_CREATE_INFO,

samples/api/hello_triangle_1_3/hello_triangle_1_3.cpp

@@ -360,7 +360,7 @@ void HelloTriangleV13::init_device()
 	    .pNext = &enable_vulkan13_features};
 	// Create the logical device
 
-	float queue_priority = 1.0f;
+	float queue_priority = 0.5f;
 
 	// Create one queue
 	VkDeviceQueueCreateInfo queue_info{

samples/api/hpp_hello_triangle/hpp_hello_triangle.cpp

@@ -334,7 +334,7 @@ vk::Device HPPHelloTriangle::create_device(const std::vector<const char *> &requ
 #endif
 
 	// Create a device with one queue
-	float                     queue_priority = 1.0f;
+	float                     queue_priority = 0.5f;
 	vk::DeviceQueueCreateInfo queue_info{.queueFamilyIndex = graphics_queue_index, .queueCount = 1, .pQueuePriorities = &queue_priority};
 	vk::DeviceCreateInfo      device_info{.queueCreateInfoCount    = 1,
 	                                      .pQueueCreateInfos       = &queue_info,

samples/api/hpp_hello_triangle_1_3/hpp_hello_triangle_1_3.cpp

@@ -419,7 +419,7 @@ void HPPHelloTriangleV13::init_device()
 	    enabled_features_chain = {{}, {.synchronization2 = true, .dynamicRendering = true}, {.extendedDynamicState = true}};
 
 	// Create the logical device
-	float queue_priority = 1.0f;
+	float queue_priority = 0.5f;
 
 	// Create one queue
 	vk::DeviceQueueCreateInfo queue_info{.queueFamilyIndex = static_cast<uint32_t>(context.graphics_queue_index),

samples/extensions/full_screen_exclusive/full_screen_exclusive.cpp

@@ -220,7 +220,7 @@ void FullScreenExclusive::init_device(const std::vector<const char *> &required_
 		throw std::runtime_error("Required device extensions are missing, will try without.");
 	}
 
-	float queue_priority = 1.0f;
+	float queue_priority = 0.5f;
 
 	VkDeviceQueueCreateInfo queue_info{VK_STRUCTURE_TYPE_DEVICE_QUEUE_CREATE_INFO};
 	queue_info.queueFamilyIndex = context.graphics_queue_index;

samples/tooling/profiles/profiles.cpp

@@ -74,7 +74,7 @@ std::unique_ptr<vkb::core::DeviceC> Profiles::create_device(vkb::core::PhysicalD
 	// Simplified queue setup (only graphics)
 	uint32_t                selected_queue_family   = 0;
 	const auto             &queue_family_properties = gpu.get_queue_family_properties();
-	const float             default_queue_priority{0.0f};
+	const float             default_queue_priority{0.5f};
 	VkDeviceQueueCreateInfo queue_create_info{};
 	queue_create_info.sType            = VK_STRUCTURE_TYPE_DEVICE_QUEUE_CREATE_INFO;
 	queue_create_info.queueCount       = 1;