tomato-testing/examples/example_glfw_wgpu/main.cpp
Green Sky 0e1b1703f6 Squashed 'external/imgui/imgui/' changes from b475309fa1e..6ccc561a2ab
6ccc561a2ab Version 1.90.6
0d483a1c89f Backends: OpenGL3: Update loader for Linux to support EGL/GLVND. (#7562)
92df32d3390 Backends: OpenGL3: minor update of generated loader to match latest downloaded glcorearb.h/khrplatform.h files.
1ab1af80c74 Backends: Win32: Facepalm revert part of d15574c + additional commentary (#6275)
d15574ce2a5 Backends: Win32: Removed silent return when calling ImGui_ImplWin32_WndProcHandler() with no active context! (#6275)
d4495446d53 Windows, Internal: added experimental SkipRefresh mode. (#3515, #4763, #7556, #5116 , #4076, #2749, #2268)
0b309471f2e Windows: Changed default ClipRect to extend to windows' left and right borders. (#3312, #7540, #3756, #6170, #6365)
0c9c12c1bb9 InnerClipRect use ImFloor() matching docking branch (fix c41868531 for #6861, #2884, followed by rename 94da5842)
6ebbecc6a08 Realign assignments.
fc4d818e170 Tables: Angled headers: added TableAngledHeadersTextAlign, ImGuiStyleVar_TableAngledHeadersTextAlign. (#6917)
4bb75671414 Tables: Angled headers: fixed multi-line label display when angle is flipped. (#6917)
b30df8890de Table: Angled Headers: internal refactor to facilitate changing angled header bg and text colors per column. (#6917)
558c57a086c Fixed static analyzer warning "Pointer to local array 'overlay_buf' is stored outside the scope". Technically not used outside that scope, but best to play nice.
50b2ff0bf03 ImGuiIO: moved IMGUI_DISABLE_OBSOLETE_KEYIO block lower in the structure so other fields layout are not affected by it (#7534)
6ef4f67fa94 ImDrawList: moved cold fields lower in the structure so hot fields are closer to each others + better packed ImGuiNavItemData
a60387a3c25 Backends: GLFW: Add define guards for glfw native defines. (#7536)
913151caa89 Demo: move progress bars to their own section.
c895e987adf ProgressBar: added indeterminate mode by passing an animated negative value. (#5316, #5370, #1901)
b8a44b198c9 TreeNode: added ImGuiTreeNodeFlags_SpanTextWidth. (#6937)
baaaaea9e91 Demo: tweak TreeNode demo.
da18fcb7aed Internals: ensure ButtonBehavior() is called with non 0 id.
b720c0f541c Backends: Vulkan: Added convenience support for Volk via IMGUI_IMPL_VULKAN_USE_VOLK define. (#6582, #4854)
07e8ff9a8d4 Backends: Win32: Fixed a warning + moved header cruft below Changelog.
fa0120ea5ea Windows: Fixed subsequent Begin() append calls from setting last item information for title-bar. (#7506, #823)
361432a0bb2 TreeNode: fixed layout so that TreeNode("") or TreeNode("##HiddenLabel") may properly be used with SameLine(0,0). (#7505, #282)
eba46cb0d22 Drag and Drop: assert when nesting  BeginDragDropSource() and BeginDragDropTarget() (#7504) + update Gallery links
9ec299ebe31 Backends: OpenGL: Detect ES3 contexts on desktop based on version string, (#7447)
7b8107e7c84 Examples: GLFW+WebGPU: Rename example_emscripten_wgpu/ to example_glfw_wgpu/ (#7435, #7132)
648278cd62f Examples: GLFW+WebGPU: Amends. (#7435, #7132)
80a5fdb1089 Examples: GLFW+WebGPU: Fixed condition for when to recreate swapchain. (#7435, #7132)
f9df6bf6622 Examples: GLFW+WebGPU: added support for WebGPU-native/Dawn (#7435, #7132)

git-subtree-dir: external/imgui/imgui
git-subtree-split: 6ccc561a2ab497ad4ae6ee1dbd3b992ffada35cb
2024-05-15 13:22:13 +02:00

346 lines
14 KiB
C++

// Dear ImGui: standalone example application for using GLFW + WebGPU
// - Emscripten is supported for publishing on web. See https://emscripten.org.
// - Dawn is used as a WebGPU implementation on desktop.
// Learn about Dear ImGui:
// - FAQ https://dearimgui.com/faq
// - Getting Started https://dearimgui.com/getting-started
// - Documentation https://dearimgui.com/docs (same as your local docs/ folder).
// - Introduction, links and more at the top of imgui.cpp
#include "imgui.h"
#include "imgui_impl_glfw.h"
#include "imgui_impl_wgpu.h"
#include <stdio.h>
#ifdef __EMSCRIPTEN__
#include <emscripten.h>
#include <emscripten/html5.h>
#include <emscripten/html5_webgpu.h>
#else
#include <webgpu/webgpu_glfw.h>
#endif
#include <GLFW/glfw3.h>
#include <webgpu/webgpu.h>
#include <webgpu/webgpu_cpp.h>
// This example can also compile and run with Emscripten! See 'Makefile.emscripten' for details.
#ifdef __EMSCRIPTEN__
#include "../libs/emscripten/emscripten_mainloop_stub.h"
#endif
// Global WebGPU required states
static WGPUInstance wgpu_instance = nullptr;
static WGPUDevice wgpu_device = nullptr;
static WGPUSurface wgpu_surface = nullptr;
static WGPUTextureFormat wgpu_preferred_fmt = WGPUTextureFormat_RGBA8Unorm;
static WGPUSwapChain wgpu_swap_chain = nullptr;
static int wgpu_swap_chain_width = 1280;
static int wgpu_swap_chain_height = 720;
// Forward declarations
static bool InitWGPU(GLFWwindow* window);
static void CreateSwapChain(int width, int height);
static void glfw_error_callback(int error, const char* description)
{
printf("GLFW Error %d: %s\n", error, description);
}
static void wgpu_error_callback(WGPUErrorType error_type, const char* message, void*)
{
const char* error_type_lbl = "";
switch (error_type)
{
case WGPUErrorType_Validation: error_type_lbl = "Validation"; break;
case WGPUErrorType_OutOfMemory: error_type_lbl = "Out of memory"; break;
case WGPUErrorType_Unknown: error_type_lbl = "Unknown"; break;
case WGPUErrorType_DeviceLost: error_type_lbl = "Device lost"; break;
default: error_type_lbl = "Unknown";
}
printf("%s error: %s\n", error_type_lbl, message);
}
// Main code
int main(int, char**)
{
glfwSetErrorCallback(glfw_error_callback);
if (!glfwInit())
return 1;
// Make sure GLFW does not initialize any graphics context.
// This needs to be done explicitly later.
glfwWindowHint(GLFW_CLIENT_API, GLFW_NO_API);
GLFWwindow* window = glfwCreateWindow(wgpu_swap_chain_width, wgpu_swap_chain_height, "Dear ImGui GLFW+WebGPU example", nullptr, nullptr);
if (window == nullptr)
return 1;
// Initialize the WebGPU environment
if (!InitWGPU(window))
{
if (window)
glfwDestroyWindow(window);
glfwTerminate();
return 1;
}
CreateSwapChain(wgpu_swap_chain_width, wgpu_swap_chain_height);
glfwShowWindow(window);
// Setup Dear ImGui context
IMGUI_CHECKVERSION();
ImGui::CreateContext();
ImGuiIO& io = ImGui::GetIO(); (void)io;
io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard; // Enable Keyboard Controls
io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad; // Enable Gamepad Controls
// Setup Dear ImGui style
ImGui::StyleColorsDark();
//ImGui::StyleColorsLight();
// Setup Platform/Renderer backends
ImGui_ImplGlfw_InitForOther(window, true);
#ifdef __EMSCRIPTEN__
ImGui_ImplGlfw_InstallEmscriptenCanvasResizeCallback("#canvas");
#endif
ImGui_ImplWGPU_InitInfo init_info;
init_info.Device = wgpu_device;
init_info.NumFramesInFlight = 3;
init_info.RenderTargetFormat = wgpu_preferred_fmt;
init_info.DepthStencilFormat = WGPUTextureFormat_Undefined;
ImGui_ImplWGPU_Init(&init_info);
// Load Fonts
// - If no fonts are loaded, dear imgui will use the default font. You can also load multiple fonts and use ImGui::PushFont()/PopFont() to select them.
// - AddFontFromFileTTF() will return the ImFont* so you can store it if you need to select the font among multiple.
// - If the file cannot be loaded, the function will return a nullptr. Please handle those errors in your application (e.g. use an assertion, or display an error and quit).
// - The fonts will be rasterized at a given size (w/ oversampling) and stored into a texture when calling ImFontAtlas::Build()/GetTexDataAsXXXX(), which ImGui_ImplXXXX_NewFrame below will call.
// - Use '#define IMGUI_ENABLE_FREETYPE' in your imconfig file to use Freetype for higher quality font rendering.
// - Read 'docs/FONTS.md' for more instructions and details.
// - Remember that in C/C++ if you want to include a backslash \ in a string literal you need to write a double backslash \\ !
// - Emscripten allows preloading a file or folder to be accessible at runtime. See Makefile for details.
//io.Fonts->AddFontDefault();
#ifndef IMGUI_DISABLE_FILE_FUNCTIONS
//io.Fonts->AddFontFromFileTTF("fonts/segoeui.ttf", 18.0f);
//io.Fonts->AddFontFromFileTTF("fonts/DroidSans.ttf", 16.0f);
//io.Fonts->AddFontFromFileTTF("fonts/Roboto-Medium.ttf", 16.0f);
//io.Fonts->AddFontFromFileTTF("fonts/Cousine-Regular.ttf", 15.0f);
//io.Fonts->AddFontFromFileTTF("fonts/ProggyTiny.ttf", 10.0f);
//ImFont* font = io.Fonts->AddFontFromFileTTF("fonts/ArialUni.ttf", 18.0f, nullptr, io.Fonts->GetGlyphRangesJapanese());
//IM_ASSERT(font != nullptr);
#endif
// Our state
bool show_demo_window = true;
bool show_another_window = false;
ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
// Main loop
#ifdef __EMSCRIPTEN__
// For an Emscripten build we are disabling file-system access, so let's not attempt to do a fopen() of the imgui.ini file.
// You may manually call LoadIniSettingsFromMemory() to load settings from your own storage.
io.IniFilename = nullptr;
EMSCRIPTEN_MAINLOOP_BEGIN
#else
while (!glfwWindowShouldClose(window))
#endif
{
// Poll and handle events (inputs, window resize, etc.)
// You can read the io.WantCaptureMouse, io.WantCaptureKeyboard flags to tell if dear imgui wants to use your inputs.
// - When io.WantCaptureMouse is true, do not dispatch mouse input data to your main application, or clear/overwrite your copy of the mouse data.
// - When io.WantCaptureKeyboard is true, do not dispatch keyboard input data to your main application, or clear/overwrite your copy of the keyboard data.
// Generally you may always pass all inputs to dear imgui, and hide them from your application based on those two flags.
glfwPollEvents();
// React to changes in screen size
int width, height;
glfwGetFramebufferSize((GLFWwindow*)window, &width, &height);
if (width != wgpu_swap_chain_width || height != wgpu_swap_chain_height)
{
ImGui_ImplWGPU_InvalidateDeviceObjects();
CreateSwapChain(width, height);
ImGui_ImplWGPU_CreateDeviceObjects();
}
// Start the Dear ImGui frame
ImGui_ImplWGPU_NewFrame();
ImGui_ImplGlfw_NewFrame();
ImGui::NewFrame();
// 1. Show the big demo window (Most of the sample code is in ImGui::ShowDemoWindow()! You can browse its code to learn more about Dear ImGui!).
if (show_demo_window)
ImGui::ShowDemoWindow(&show_demo_window);
// 2. Show a simple window that we create ourselves. We use a Begin/End pair to create a named window.
{
static float f = 0.0f;
static int counter = 0;
ImGui::Begin("Hello, world!"); // Create a window called "Hello, world!" and append into it.
ImGui::Text("This is some useful text."); // Display some text (you can use a format strings too)
ImGui::Checkbox("Demo Window", &show_demo_window); // Edit bools storing our window open/close state
ImGui::Checkbox("Another Window", &show_another_window);
ImGui::SliderFloat("float", &f, 0.0f, 1.0f); // Edit 1 float using a slider from 0.0f to 1.0f
ImGui::ColorEdit3("clear color", (float*)&clear_color); // Edit 3 floats representing a color
if (ImGui::Button("Button")) // Buttons return true when clicked (most widgets return true when edited/activated)
counter++;
ImGui::SameLine();
ImGui::Text("counter = %d", counter);
ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", 1000.0f / io.Framerate, io.Framerate);
ImGui::End();
}
// 3. Show another simple window.
if (show_another_window)
{
ImGui::Begin("Another Window", &show_another_window); // Pass a pointer to our bool variable (the window will have a closing button that will clear the bool when clicked)
ImGui::Text("Hello from another window!");
if (ImGui::Button("Close Me"))
show_another_window = false;
ImGui::End();
}
// Rendering
ImGui::Render();
#ifndef __EMSCRIPTEN__
// Tick needs to be called in Dawn to display validation errors
wgpuDeviceTick(wgpu_device);
#endif
WGPURenderPassColorAttachment color_attachments = {};
color_attachments.depthSlice = WGPU_DEPTH_SLICE_UNDEFINED;
color_attachments.loadOp = WGPULoadOp_Clear;
color_attachments.storeOp = WGPUStoreOp_Store;
color_attachments.clearValue = { clear_color.x * clear_color.w, clear_color.y * clear_color.w, clear_color.z * clear_color.w, clear_color.w };
color_attachments.view = wgpuSwapChainGetCurrentTextureView(wgpu_swap_chain);
WGPURenderPassDescriptor render_pass_desc = {};
render_pass_desc.colorAttachmentCount = 1;
render_pass_desc.colorAttachments = &color_attachments;
render_pass_desc.depthStencilAttachment = nullptr;
WGPUCommandEncoderDescriptor enc_desc = {};
WGPUCommandEncoder encoder = wgpuDeviceCreateCommandEncoder(wgpu_device, &enc_desc);
WGPURenderPassEncoder pass = wgpuCommandEncoderBeginRenderPass(encoder, &render_pass_desc);
ImGui_ImplWGPU_RenderDrawData(ImGui::GetDrawData(), pass);
wgpuRenderPassEncoderEnd(pass);
WGPUCommandBufferDescriptor cmd_buffer_desc = {};
WGPUCommandBuffer cmd_buffer = wgpuCommandEncoderFinish(encoder, &cmd_buffer_desc);
WGPUQueue queue = wgpuDeviceGetQueue(wgpu_device);
wgpuQueueSubmit(queue, 1, &cmd_buffer);
#ifndef __EMSCRIPTEN__
wgpuSwapChainPresent(wgpu_swap_chain);
#endif
wgpuTextureViewRelease(color_attachments.view);
wgpuRenderPassEncoderRelease(pass);
wgpuCommandEncoderRelease(encoder);
wgpuCommandBufferRelease(cmd_buffer);
}
#ifdef __EMSCRIPTEN__
EMSCRIPTEN_MAINLOOP_END;
#endif
// Cleanup
ImGui_ImplWGPU_Shutdown();
ImGui_ImplGlfw_Shutdown();
ImGui::DestroyContext();
glfwDestroyWindow(window);
glfwTerminate();
return 0;
}
#ifndef __EMSCRIPTEN__
static WGPUAdapter RequestAdapter(WGPUInstance instance)
{
auto onAdapterRequestEnded = [](WGPURequestAdapterStatus status, WGPUAdapter adapter, const char* message, void* pUserData)
{
if (status == WGPURequestAdapterStatus_Success)
*(WGPUAdapter*)(pUserData) = adapter;
else
printf("Could not get WebGPU adapter: %s\n", message);
};
WGPUAdapter adapter;
wgpuInstanceRequestAdapter(instance, nullptr, onAdapterRequestEnded, (void*)&adapter);
return adapter;
}
static WGPUDevice RequestDevice(WGPUAdapter& adapter)
{
auto onDeviceRequestEnded = [](WGPURequestDeviceStatus status, WGPUDevice device, const char* message, void* pUserData)
{
if (status == WGPURequestDeviceStatus_Success)
*(WGPUDevice*)(pUserData) = device;
else
printf("Could not get WebGPU device: %s\n", message);
};
WGPUDevice device;
wgpuAdapterRequestDevice(adapter, nullptr, onDeviceRequestEnded, (void*)&device);
return device;
}
#endif
static bool InitWGPU(GLFWwindow* window)
{
wgpu::Instance instance = wgpuCreateInstance(nullptr);
#ifdef __EMSCRIPTEN__
wgpu_device = emscripten_webgpu_get_device();
if (!wgpu_device)
return false;
#else
WGPUAdapter adapter = RequestAdapter(instance.Get());
if (!adapter)
return false;
wgpu_device = RequestDevice(adapter);
#endif
#ifdef __EMSCRIPTEN__
wgpu::SurfaceDescriptorFromCanvasHTMLSelector html_surface_desc = {};
html_surface_desc.selector = "#canvas";
wgpu::SurfaceDescriptor surface_desc = {};
surface_desc.nextInChain = &html_surface_desc;
wgpu::Surface surface = instance.CreateSurface(&surface_desc);
wgpu::Adapter adapter = {};
wgpu_preferred_fmt = (WGPUTextureFormat)surface.GetPreferredFormat(adapter);
#else
wgpu::Surface surface = wgpu::glfw::CreateSurfaceForWindow(instance, window);
if (!surface)
return false;
wgpu_preferred_fmt = WGPUTextureFormat_BGRA8Unorm;
#endif
wgpu_instance = instance.MoveToCHandle();
wgpu_surface = surface.MoveToCHandle();
wgpuDeviceSetUncapturedErrorCallback(wgpu_device, wgpu_error_callback, nullptr);
return true;
}
static void CreateSwapChain(int width, int height)
{
if (wgpu_swap_chain)
wgpuSwapChainRelease(wgpu_swap_chain);
wgpu_swap_chain_width = width;
wgpu_swap_chain_height = height;
WGPUSwapChainDescriptor swap_chain_desc = {};
swap_chain_desc.usage = WGPUTextureUsage_RenderAttachment;
swap_chain_desc.format = wgpu_preferred_fmt;
swap_chain_desc.width = width;
swap_chain_desc.height = height;
swap_chain_desc.presentMode = WGPUPresentMode_Fifo;
wgpu_swap_chain = wgpuDeviceCreateSwapChain(wgpu_device, wgpu_surface, &swap_chain_desc);
}