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Examples: Add Win32+Vulkan example, amends. (#8180)

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ocornut
2025-01-06 17:43:52 +01:00
parent 38e606a153
commit 93a93071a2
7 changed files with 46 additions and 86 deletions
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61
examples/example_win32_vulkan/main.cpp
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@@ -1,4 +1,4 @@
// Dear ImGui: standalone example application for Vulkan
// Dear ImGui: standalone example application for Win32 + Vulkan
// Learn about Dear ImGui:
// - FAQ https://dearimgui.com/faq
@@ -74,35 +74,6 @@ static bool IsExtensionAvailable(const ImVector<VkExtensionProperties>& properti
return false;
}
static VkPhysicalDevice SetupVulkan_SelectPhysicalDevice()
{
uint32_t gpu_count;
VkResult err = vkEnumeratePhysicalDevices(g_Instance, &gpu_count, nullptr);
check_vk_result(err);
IM_ASSERT(gpu_count > 0);
ImVector<VkPhysicalDevice> gpus;
gpus.resize(gpu_count);
err = vkEnumeratePhysicalDevices(g_Instance, &gpu_count, gpus.Data);
check_vk_result(err);
// If a number >1 of GPUs got reported, find discrete GPU if present, or use first one available. This covers
// most common cases (multi-gpu/integrated+dedicated graphics). Handling more complicated setups (multiple
// dedicated GPUs) is out of scope of this sample.
for (VkPhysicalDevice& device : gpus)
{
VkPhysicalDeviceProperties properties;
vkGetPhysicalDeviceProperties(device, &properties);
if (properties.deviceType == VK_PHYSICAL_DEVICE_TYPE_DISCRETE_GPU)
return device;
}
// Use first GPU (Integrated) is a Discrete one is not available.
if (gpu_count > 0)
return gpus[0];
return VK_NULL_HANDLE;
}
static void SetupVulkan(ImVector<const char*> instance_extensions)
{
VkResult err;
@@ -166,23 +137,12 @@ static void SetupVulkan(ImVector<const char*> instance_extensions)
}
// Select Physical Device (GPU)
g_PhysicalDevice = SetupVulkan_SelectPhysicalDevice();
g_PhysicalDevice = ImGui_ImplVulkanH_SelectPhysicalDevice(g_Instance);
IM_ASSERT(g_PhysicalDevice != VK_NULL_HANDLE);
// Select graphics queue family
{
uint32_t count;
vkGetPhysicalDeviceQueueFamilyProperties(g_PhysicalDevice, &count, nullptr);
VkQueueFamilyProperties* queues = (VkQueueFamilyProperties*)malloc(sizeof(VkQueueFamilyProperties) * count);
vkGetPhysicalDeviceQueueFamilyProperties(g_PhysicalDevice, &count, queues);
for (uint32_t i = 0; i < count; i++)
if (queues[i].queueFlags & VK_QUEUE_GRAPHICS_BIT)
{
g_QueueFamily = i;
break;
}
free(queues);
IM_ASSERT(g_QueueFamily != (uint32_t)-1);
}
g_QueueFamily = ImGui_ImplVulkanH_SelectQueueFamilyIndex(g_PhysicalDevice);
IM_ASSERT(g_QueueFamily != (uint32_t)-1);
// Create Logical Device (with 1 queue)
{
@@ -257,7 +217,7 @@ static void SetupVulkanWindow(ImGui_ImplVulkanH_Window* wd, VkSurfaceKHR surface
wd->SurfaceFormat = ImGui_ImplVulkanH_SelectSurfaceFormat(g_PhysicalDevice, wd->Surface, requestSurfaceImageFormat, (size_t)IM_ARRAYSIZE(requestSurfaceImageFormat), requestSurfaceColorSpace);
// Select Present Mode
#ifdef APP_UNLIMITED_FRAME_RATE
#ifdef APP_USE_UNLIMITED_FRAME_RATE
VkPresentModeKHR present_modes[] = { VK_PRESENT_MODE_MAILBOX_KHR, VK_PRESENT_MODE_IMMEDIATE_KHR, VK_PRESENT_MODE_FIFO_KHR };
#else
VkPresentModeKHR present_modes[] = { VK_PRESENT_MODE_FIFO_KHR };
@@ -387,7 +347,7 @@ int main(int, char**)
//ImGui_ImplWin32_EnableDpiAwareness();
WNDCLASSEXW wc = { sizeof(wc), CS_CLASSDC, WndProc, 0L, 0L, GetModuleHandle(nullptr), nullptr, nullptr, nullptr, nullptr, L"ImGui Example", nullptr };
::RegisterClassExW(&wc);
HWND hwnd = ::CreateWindowW(wc.lpszClassName, L"Dear ImGui Vulkan Example", WS_OVERLAPPEDWINDOW, 100, 100, 1280, 800, nullptr, nullptr, wc.hInstance, nullptr);
HWND hwnd = ::CreateWindowW(wc.lpszClassName, L"Dear ImGui Win32+Vulkan Example", WS_OVERLAPPEDWINDOW, 100, 100, 1280, 800, nullptr, nullptr, wc.hInstance, nullptr);
ImVector<const char*> extensions;
extensions.push_back("VK_KHR_surface");
@@ -400,7 +360,7 @@ int main(int, char**)
VkWin32SurfaceCreateInfoKHR createInfo = {};
createInfo.sType = VK_STRUCTURE_TYPE_WIN32_SURFACE_CREATE_INFO_KHR;
createInfo.hwnd = hwnd;
createInfo.hinstance = GetModuleHandle(nullptr);
createInfo.hinstance = ::GetModuleHandle(nullptr);
if (vkCreateWin32SurfaceKHR(g_Instance, &createInfo, nullptr, &surface) != VK_SUCCESS)
{
printf("Failed to create Vulkan surface.\n");
@@ -408,6 +368,7 @@ int main(int, char**)
}
// Show the window
// FIXME: Retrieve client size from window itself.
ImGui_ImplVulkanH_Window* wd = &g_MainWindowData;
SetupVulkanWindow(wd, surface, 1280, 800);
::ShowWindow(hwnd, SW_SHOWDEFAULT);
@@ -525,7 +486,6 @@ int main(int, char**)
// Rendering
ImGui::Render();
ImDrawData* draw_data = ImGui::GetDrawData();
const bool is_minimized = (draw_data->DisplaySize.x <= 0.0f || draw_data->DisplaySize.y <= 0.0f);
if (!is_minimized)
@@ -539,10 +499,9 @@ int main(int, char**)
}
}
// Cleanup
err = vkDeviceWaitIdle(g_Device);
check_vk_result(err);
// Cleanup
ImGui_ImplVulkan_Shutdown();
ImGui_ImplWin32_Shutdown();
ImGui::DestroyContext();