|
|
@@ -0,0 +1,188 @@
|
|
|
+// Dear ImGui: standalone example application for SDL3 + Metal
|
|
|
+// (SDL is a cross-platform general purpose library for handling windows, inputs, OpenGL/Vulkan/Metal graphics context creation, etc.)
|
|
|
+
|
|
|
+// 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_sdl3.h"
|
|
|
+#include "imgui_impl_metal.h"
|
|
|
+#include <stdio.h>
|
|
|
+#include <SDL3/SDL.h>
|
|
|
+
|
|
|
+#import <Metal/Metal.h>
|
|
|
+#import <QuartzCore/QuartzCore.h>
|
|
|
+
|
|
|
+int main(int, char**)
|
|
|
+{
|
|
|
+ // Setup SDL
|
|
|
+ // [If using SDL_MAIN_USE_CALLBACKS: all code below until the main loop starts would likely be your SDL_AppInit() function]
|
|
|
+ if (!SDL_Init(SDL_INIT_VIDEO | SDL_INIT_GAMEPAD))
|
|
|
+ {
|
|
|
+ printf("Error: SDL_Init(): %s\n", SDL_GetError());
|
|
|
+ return -1;
|
|
|
+ }
|
|
|
+
|
|
|
+ float main_scale = SDL_GetDisplayContentScale(SDL_GetPrimaryDisplay());
|
|
|
+ SDL_WindowFlags window_flags = SDL_WINDOW_METAL | SDL_WINDOW_RESIZABLE | SDL_WINDOW_HIDDEN | SDL_WINDOW_HIGH_PIXEL_DENSITY;
|
|
|
+ SDL_Window *window = SDL_CreateWindow("Dear ImGui SDL3+SDL_GPU example", (int)(1280 * main_scale), (int)(720 * main_scale), window_flags);
|
|
|
+ if (window == nullptr)
|
|
|
+ {
|
|
|
+ printf("Error: SDL_CreateWindow(): %s\n", SDL_GetError());
|
|
|
+ return -1;
|
|
|
+ }
|
|
|
+ SDL_SetWindowPosition(window, SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED);
|
|
|
+ SDL_ShowWindow(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 scaling
|
|
|
+ ImGuiStyle& style = ImGui::GetStyle();
|
|
|
+ style.ScaleAllSizes(main_scale); // Bake a fixed style scale. (until we have a solution for dynamic style scaling, changing this requires resetting Style + calling this again)
|
|
|
+ style.FontScaleDpi = main_scale; // Set initial font scale. (using io.ConfigDpiScaleFonts=true makes this unnecessary. We leave both here for documentation purpose)
|
|
|
+
|
|
|
+ // Setup Platform/Renderer backends
|
|
|
+ // Create Metal device BEFORE creating the view/layer
|
|
|
+ id<MTLDevice> metalDevice = MTLCreateSystemDefaultDevice();
|
|
|
+ if (!metalDevice)
|
|
|
+ {
|
|
|
+ printf("Error: failed to create Metal device.\n");
|
|
|
+ SDL_DestroyWindow(window);
|
|
|
+ SDL_Quit();
|
|
|
+ return -1;
|
|
|
+ }
|
|
|
+
|
|
|
+ SDL_MetalView view = SDL_Metal_CreateView(window);
|
|
|
+ CAMetalLayer* layer = (__bridge CAMetalLayer*)SDL_Metal_GetLayer(view);
|
|
|
+ layer.device = metalDevice;
|
|
|
+ layer.pixelFormat = MTLPixelFormatBGRA8Unorm;
|
|
|
+ ImGui_ImplMetal_Init(layer.device);
|
|
|
+
|
|
|
+ ImGui_ImplSDL3_InitForMetal(window);
|
|
|
+
|
|
|
+ id<MTLCommandQueue> commandQueue = [layer.device newCommandQueue];
|
|
|
+ MTLRenderPassDescriptor* renderPassDescriptor = [MTLRenderPassDescriptor new];
|
|
|
+
|
|
|
+ // Our state
|
|
|
+ bool show_demo_window = true;
|
|
|
+ bool show_another_window = false;
|
|
|
+ float clear_color[4] = {0.45f, 0.55f, 0.60f, 1.00f};
|
|
|
+
|
|
|
+ // Main loop
|
|
|
+ bool done = false;
|
|
|
+ while (!done)
|
|
|
+ {
|
|
|
+ @autoreleasepool
|
|
|
+ {
|
|
|
+ // 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.
|
|
|
+ SDL_Event event;
|
|
|
+ while (SDL_PollEvent(&event))
|
|
|
+ {
|
|
|
+ ImGui_ImplSDL3_ProcessEvent(&event);
|
|
|
+ if (event.type == SDL_EVENT_QUIT)
|
|
|
+ done = true;
|
|
|
+ if (event.type == SDL_EVENT_WINDOW_CLOSE_REQUESTED && event.window.windowID == SDL_GetWindowID(window))
|
|
|
+ done = true;
|
|
|
+ }
|
|
|
+
|
|
|
+ // [If using SDL_MAIN_USE_CALLBACKS: all code below would likely be your SDL_AppIterate() function]
|
|
|
+ if (SDL_GetWindowFlags(window) & SDL_WINDOW_MINIMIZED)
|
|
|
+ {
|
|
|
+ SDL_Delay(10);
|
|
|
+ continue;
|
|
|
+ }
|
|
|
+
|
|
|
+ int width, height;
|
|
|
+ SDL_GetWindowSizeInPixels(window, &width, &height);
|
|
|
+
|
|
|
+ layer.drawableSize = CGSizeMake(width, height);
|
|
|
+ id<CAMetalDrawable> drawable = [layer nextDrawable];
|
|
|
+
|
|
|
+ id<MTLCommandBuffer> commandBuffer = [commandQueue commandBuffer];
|
|
|
+ renderPassDescriptor.colorAttachments[0].clearColor = MTLClearColorMake(clear_color[0] * clear_color[3], clear_color[1] * clear_color[3], clear_color[2] * clear_color[3], clear_color[3]);
|
|
|
+ renderPassDescriptor.colorAttachments[0].texture = drawable.texture;
|
|
|
+ renderPassDescriptor.colorAttachments[0].loadAction = MTLLoadActionClear;
|
|
|
+ renderPassDescriptor.colorAttachments[0].storeAction = MTLStoreActionStore;
|
|
|
+ id <MTLRenderCommandEncoder> renderEncoder = [commandBuffer renderCommandEncoderWithDescriptor:renderPassDescriptor];
|
|
|
+ [renderEncoder pushDebugGroup:@"ImGui demo"];
|
|
|
+
|
|
|
+ // Start the Dear ImGui frame
|
|
|
+ ImGui_ImplMetal_NewFrame(renderPassDescriptor);
|
|
|
+ ImGui_ImplSDL3_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();
|
|
|
+ ImGui_ImplMetal_RenderDrawData(ImGui::GetDrawData(), commandBuffer, renderEncoder);
|
|
|
+
|
|
|
+ [renderEncoder popDebugGroup];
|
|
|
+ [renderEncoder endEncoding];
|
|
|
+
|
|
|
+ [commandBuffer presentDrawable:drawable];
|
|
|
+ [commandBuffer commit];
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ // Cleanup
|
|
|
+ ImGui_ImplMetal_Shutdown();
|
|
|
+ ImGui_ImplSDL3_Shutdown();
|
|
|
+ ImGui::DestroyContext();
|
|
|
+
|
|
|
+ SDL_DestroyWindow(window);
|
|
|
+ SDL_Quit();
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
Shi Yan