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-// Dear ImGui: standalone example application for GLFW + Metal, using programmable pipeline
-// (GLFW 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_glfw.h"
-#include "imgui_impl_metal.h"
-#include <stdio.h>
-
-#define GLFW_INCLUDE_NONE
-#define GLFW_EXPOSE_NATIVE_COCOA
-#include <GLFW/glfw3.h>
-#include <GLFW/glfw3native.h>
-
-#import <Metal/Metal.h>
-#import <QuartzCore/QuartzCore.h>
-
-static void glfw_error_callback(int error, const char* description)
-{
- fprintf(stderr, "Glfw Error %d: %s\n", error, description);
-}
-
-int main(int, char**)
-{
- // 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 style
- ImGui::StyleColorsDark();
- //ImGui::StyleColorsLight();
-
- // 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).
- // - 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 \\ !
- //style.FontSizeBase = 20.0f;
- //io.Fonts->AddFontDefault();
- //io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\segoeui.ttf");
- //io.Fonts->AddFontFromFileTTF("../../misc/fonts/DroidSans.ttf");
- //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Roboto-Medium.ttf");
- //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Cousine-Regular.ttf");
- //ImFont* font = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf");
- //IM_ASSERT(font != nullptr);
-
- // Setup window
- glfwSetErrorCallback(glfw_error_callback);
- if (!glfwInit())
- return 1;
-
- // Create window with graphics context
- glfwWindowHint(GLFW_CLIENT_API, GLFW_NO_API);
- GLFWwindow* window = glfwCreateWindow(1280, 720, "Dear ImGui GLFW+Metal example", nullptr, nullptr);
- if (window == nullptr)
- return 1;
-
- id <MTLDevice> device = MTLCreateSystemDefaultDevice();
- id <MTLCommandQueue> commandQueue = [device newCommandQueue];
-
- // Setup Platform/Renderer backends
- ImGui_ImplGlfw_InitForOpenGL(window, true);
- ImGui_ImplMetal_Init(device);
-
- NSWindow *nswin = glfwGetCocoaWindow(window);
- CAMetalLayer *layer = [CAMetalLayer layer];
- layer.device = device;
- layer.pixelFormat = MTLPixelFormatBGRA8Unorm;
- nswin.contentView.layer = layer;
- nswin.contentView.wantsLayer = YES;
-
- 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
- while (!glfwWindowShouldClose(window))
- {
- @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.
- glfwPollEvents();
-
- int width, height;
- glfwGetFramebufferSize(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_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();
- ImGui_ImplMetal_RenderDrawData(ImGui::GetDrawData(), commandBuffer, renderEncoder);
-
- [renderEncoder popDebugGroup];
- [renderEncoder endEncoding];
-
- [commandBuffer presentDrawable:drawable];
- [commandBuffer commit];
- }
- }
-
- // Cleanup
- ImGui_ImplMetal_Shutdown();
- ImGui_ImplGlfw_Shutdown();
- ImGui::DestroyContext();
-
- glfwDestroyWindow(window);
- glfwTerminate();
-
- return 0;
-}