90 lines
2.4 KiB
C++
90 lines
2.4 KiB
C++
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// python -m glad --out-path=build --api="gl=2.1" --extensions="" --generator="c"
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// g++ example/c++/sdl.cpp build/src/glad.c -Ibuild/include -lSDL2 -ldl
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#include <iostream>
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#include <glad/glad.h>
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#include <SDL2/SDL.h>
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int main(int argc, char **argv) {
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if (SDL_Init(SDL_INIT_VIDEO) != 0) {
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std::cerr << "SDL2 video subsystem couldn't be initialized. Error: "
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<< SDL_GetError()
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<< std::endl;
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exit(1);
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}
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SDL_Window* window = SDL_CreateWindow("Glad Sample",
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SDL_WINDOWPOS_CENTERED,
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SDL_WINDOWPOS_CENTERED,
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800, 600, SDL_WINDOW_SHOWN |
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SDL_WINDOW_OPENGL);
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SDL_Renderer* renderer = SDL_CreateRenderer(window, -1,
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SDL_RENDERER_ACCELERATED);
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if (renderer == nullptr) {
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std::cerr << "SDL2 Renderer couldn't be created. Error: "
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<< SDL_GetError()
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<< std::endl;
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exit(1);
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}
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// Create a OpenGL context on SDL2
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SDL_GLContext gl_context = SDL_GL_CreateContext(window);
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// Load GL extensions using glad
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if (!gladLoadGLLoader((GLADloadproc) SDL_GL_GetProcAddress)) {
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std::cerr << "Failed to initialize the OpenGL context." << std::endl;
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exit(1);
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}
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// Loaded OpenGL successfully.
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std::cout << "OpenGL version loaded: " << GLVersion.major << "."
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<< GLVersion.minor << std::endl;
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// Create an event handler
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SDL_Event event;
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// Loop condition
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bool running = true;
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while (running) {
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SDL_PollEvent(&event);
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switch(event.type) {
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case SDL_QUIT:
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running = false;
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break;
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case SDL_KEYDOWN:
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switch(event.key.keysym.sym) {
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case SDLK_ESCAPE:
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running = false;
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break;
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}
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}
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glClearColor(0, 0, 0, 1);
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// You'd want to use modern OpenGL here
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glColor3d(0, 1, 0);
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glBegin(GL_TRIANGLES);
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glVertex2f(.2, 0);
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glVertex2f(.01, .2);
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glVertex2f(-.2, 0);
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glEnd();
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SDL_GL_SwapWindow(window);
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}
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// Destroy everything to not leak memory.
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SDL_GL_DeleteContext(gl_context);
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SDL_DestroyRenderer(renderer);
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SDL_DestroyWindow(window);
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SDL_Quit();
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return 0;
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}
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