100 lines
3.3 KiB
C++
100 lines
3.3 KiB
C++
#include "overlay.hpp"
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#include <stdio.h>
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#include "imgui/imgui.h"
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#include "imgui/imgui_impl_sdl3.h"
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#include "imgui/imgui_impl_opengl3.h"
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#include <SDL3/SDL.h>
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#include <SDL3/SDL_opengl.h>
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int run_overlay(void)
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{
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// Setup SDL
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if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_TIMER | SDL_INIT_GAMEPAD) != 0)
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{
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printf("Error: SDL_Init(): %s\n", SDL_GetError());
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return -1;
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}
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const char* glsl_version = "#version 130";
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SDL_GL_SetAttribute(SDL_GL_CONTEXT_FLAGS, 0);
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SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE);
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SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
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SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 0);
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// Enable native IME.
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SDL_SetHint(SDL_HINT_IME_SHOW_UI, "1");
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// Create window with graphics context
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SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
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SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 24);
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SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE, 8);
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SDL_WindowFlags window_flags = (SDL_WindowFlags)(SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE | SDL_WINDOW_HIDDEN | SDL_WINDOW_ALWAYS_ON_TOP | SDL_WINDOW_UTILITY);
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SDL_Window* window = SDL_CreateWindow("Dear ImGui SDL3+OpenGL3 example", 1280, 720, window_flags);
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if (window == nullptr)
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{
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printf("Error: SDL_CreateWindow(): %s\n", SDL_GetError());
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return -1;
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}
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SDL_SetWindowPosition(window, SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED);
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SDL_GLContext gl_context = SDL_GL_CreateContext(window);
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SDL_GL_MakeCurrent(window, gl_context);
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SDL_GL_SetSwapInterval(1); // Enable vsync
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SDL_ShowWindow(window);
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// Setup Dear ImGui context
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IMGUI_CHECKVERSION();
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ImGui::CreateContext();
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ImGuiIO& io = ImGui::GetIO(); (void)io;
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io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard; // Enable Keyboard Controls
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io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad; // Enable Gamepad Controls
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// Setup Dear ImGui style
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ImGui::StyleColorsDark();
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// Setup Platform/Renderer backends
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ImGui_ImplSDL3_InitForOpenGL(window, gl_context);
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ImGui_ImplOpenGL3_Init(glsl_version);
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// Main loop
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bool done = false;
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ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
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while (!done)
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{
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SDL_Event event;
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while (SDL_PollEvent(&event))
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{
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ImGui_ImplSDL3_ProcessEvent(&event);
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if (event.type == SDL_EVENT_QUIT)
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done = true;
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if (event.type == SDL_EVENT_WINDOW_CLOSE_REQUESTED && event.window.windowID == SDL_GetWindowID(window))
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done = true;
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}
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// Start the Dear ImGui frame
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ImGui_ImplOpenGL3_NewFrame();
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ImGui_ImplSDL3_NewFrame();
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ImGui::NewFrame();
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ImGui::ShowDemoWindow();
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// Rendering
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ImGui::Render();
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glViewport(0, 0, (int)io.DisplaySize.x, (int)io.DisplaySize.y);
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glClearColor(clear_color.x * clear_color.w, clear_color.y * clear_color.w, clear_color.z * clear_color.w, clear_color.w);
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glClear(GL_COLOR_BUFFER_BIT);
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ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
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SDL_GL_SwapWindow(window);
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}
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// Cleanup
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ImGui_ImplOpenGL3_Shutdown();
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ImGui_ImplSDL3_Shutdown();
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ImGui::DestroyContext();
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SDL_GL_DeleteContext(gl_context);
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SDL_DestroyWindow(window);
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SDL_Quit();
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return 1;
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}
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