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93 lines
2.5 KiB
C++
93 lines
2.5 KiB
C++
/**
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* @file gui.cpp
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* @brief Contains code for GUI-related logic.
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*
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* Copyright (C) 2021 Clyne Sullivan
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*
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* Distributed under the GNU GPL v3 or later. You should have received a copy of
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* the GNU General Public License along with this program.
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* If not, see <https://www.gnu.org/licenses/>.
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*/
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#include "imgui.h"
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#include "backends/imgui_impl_sdl.h"
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#include "backends/imgui_impl_opengl2.h"
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#include "config.h"
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#include <SDL2/SDL.h>
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#include <SDL2/SDL_opengl.h>
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ImFont *font = nullptr;
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static ImGuiIO *io = nullptr;
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static SDL_Window *window = nullptr;
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static decltype(SDL_GL_CreateContext(nullptr)) gl_context;
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bool guiInitialize()
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{
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if (SDL_Init(SDL_INIT_VIDEO) != 0) {
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printf("Error: %s\n", SDL_GetError());
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return false;
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}
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// Setup window
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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_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 2);
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SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 2);
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window = SDL_CreateWindow("stmdsp gui",
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SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED,
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WINDOW_WIDTH, WINDOW_HEIGHT,
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SDL_WINDOW_OPENGL /*| SDL_WINDOW_RESIZABLE | SDL_WINDOW_ALLOW_HIGHDPI*/);
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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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// Setup Dear ImGui context
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IMGUI_CHECKVERSION();
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ImGui::CreateContext();
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io = &ImGui::GetIO();
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io->ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard;
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font = io->Fonts->AddFontFromFileTTF("fonts/Roboto-Medium.ttf", 20);
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ImGui::StyleColorsLight();
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ImGui_ImplSDL2_InitForOpenGL(window, gl_context);
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ImGui_ImplOpenGL2_Init();
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return true;
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}
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void guiRender(void (*func)())
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{
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glViewport(0, 0, (int)io->DisplaySize.x, (int)io->DisplaySize.y);
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glClearColor(1, 1, 1, 1);
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glClear(GL_COLOR_BUFFER_BIT);
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func();
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SDL_GL_SwapWindow(window);
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}
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void guiHandleEvents(bool& done)
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{
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SDL_Event event;
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for (SDL_Event event; SDL_PollEvent(&event);) {
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ImGui_ImplSDL2_ProcessEvent(&event);
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if (event.type == SDL_QUIT)
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done = true;
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if (event.type == SDL_WINDOWEVENT && event.window.event == SDL_WINDOWEVENT_CLOSE && event.window.windowID == SDL_GetWindowID(window))
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done = true;
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}
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}
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void guiShutdown()
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{
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ImGui_ImplOpenGL2_Shutdown();
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ImGui_ImplSDL2_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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}
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