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xo-imgui: refactor: streamline pick_physical_device()

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This commit is contained in:
Roland Conybeare 2025-11-11 00:56:29 -05:00
commit 7495206e79
2 changed files with 52 additions and 35 deletions
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33
xo-imgui/example/ex4a/VulkanApp.cpp
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@ -103,4 +103,37 @@ MinimalImGuiVulkan::create_surface()
}
}
void
MinimalImGuiVulkan::pick_physical_device()
{
uint32_t n_device = 0;
vkEnumeratePhysicalDevices(instance_, &n_device, nullptr);
if (n_device == 0) {
throw std::runtime_error("Failed to find GPUs with Vulkan support!");
}
std::vector<VkPhysicalDevice> devices(n_device);
vkEnumeratePhysicalDevices(instance_, &n_device, devices.data());
this->physical_device_ = devices[0]; // Just pick the first one for simplicity
// Find graphics queue family
uint32_t n_queue_family = 0;
vkGetPhysicalDeviceQueueFamilyProperties(physical_device_, &n_queue_family, nullptr);
std::vector<VkQueueFamilyProperties> queue_families(n_queue_family);
vkGetPhysicalDeviceQueueFamilyProperties(physical_device_, &n_queue_family, queue_families.data());
for (uint32_t i = 0; i < queue_families.size(); i++) {
if (queue_families[i].queueFlags & VK_QUEUE_GRAPHICS_BIT) {
VkBool32 present_support = false;
vkGetPhysicalDeviceSurfaceSupportKHR(physical_device_, i, surface_, &present_support);
if (present_support) {
this->graphics_queue_family_ = i;
break;
}
}
}
}
/* end VulkanApp.cpp */