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- improve the queue family selection process to pick first entry in the list over later ones

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This commit is contained in:
Magnus Norddahl 2019-03-24 18:33:59 +01:00
parent 0be5cc7d1d
commit 954b72915c
1 changed files with 31 additions and 9 deletions
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40
src/rendering/vulkan/system/vk_device.cpp
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@ -120,23 +120,45 @@ void VulkanDevice::SelectPhysicalDevice()
VulkanCompatibleDevice dev; VulkanCompatibleDevice dev;
dev.device = &AvailableDevices[idx]; dev.device = &AvailableDevices[idx];
int i = 0; // Figure out what can present
for (const auto& queueFamily : info.QueueFamilies) for (int i = 0; i < (int)info.QueueFamilies.size(); i++)
{ {
// Only accept a decent GPU for now.. VkBool32 presentSupport = false;
VkResult result = vkGetPhysicalDeviceSurfaceSupportKHR(info.Device, i, surface, &presentSupport);
if (result == VK_SUCCESS && info.QueueFamilies[i].queueCount > 0 && presentSupport)
{
dev.presentFamily = i;
break;
}
}
// Look for family that can do both graphics and transfer
for (int i = 0; i < (int)info.QueueFamilies.size(); i++)
{
const auto &queueFamily = info.QueueFamilies[i];
VkQueueFlags gpuFlags = (VK_QUEUE_GRAPHICS_BIT | VK_QUEUE_TRANSFER_BIT); VkQueueFlags gpuFlags = (VK_QUEUE_GRAPHICS_BIT | VK_QUEUE_TRANSFER_BIT);
if (queueFamily.queueCount > 0 && (queueFamily.queueFlags & gpuFlags) == gpuFlags) if (queueFamily.queueCount > 0 && (queueFamily.queueFlags & gpuFlags) == gpuFlags)
{ {
dev.graphicsFamily = i; dev.graphicsFamily = i;
dev.transferFamily = i; dev.transferFamily = i;
break;
} }
}
VkBool32 presentSupport = false; // OK we didn't find any. Look for any match now.
VkResult result = vkGetPhysicalDeviceSurfaceSupportKHR(info.Device, i, surface, &presentSupport); if (dev.graphicsFamily == -1)
if (result == VK_SUCCESS && queueFamily.queueCount > 0 && presentSupport) {
dev.presentFamily = i; for (int i = 0; i < (int)info.QueueFamilies.size(); i++)
{
i++; const auto &queueFamily = info.QueueFamilies[i];
if (queueFamily.queueCount > 0)
{
if (dev.graphicsFamily == -1 && (queueFamily.queueFlags & VK_QUEUE_GRAPHICS_BIT))
dev.graphicsFamily = i;
if (dev.transferFamily == -1 && (queueFamily.queueFlags & VK_QUEUE_TRANSFER_BIT))
dev.transferFamily = i;
}
}
} }
std::set<std::string> requiredExtensionSearch(EnabledDeviceExtensions.begin(), EnabledDeviceExtensions.end()); std::set<std::string> requiredExtensionSearch(EnabledDeviceExtensions.begin(), EnabledDeviceExtensions.end());