101 lines
2.1 KiB
C++
101 lines
2.1 KiB
C++
#include "gl3w.h"
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#include <SDL.h>
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#include <iostream>
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#include <ft2build.h>
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#include FT_FREETYPE_H
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using namespace std;
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#define WIDTH 500
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#define HEIGHT 500
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static FT_Library ft;
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static FT_Face face;
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void init(void)
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{
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glClearColor (0.0, 0.0, 0.0, 0.0);
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}
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void display(SDL_Window * window)
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{
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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SDL_GL_SwapWindow(window);
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}
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int main(int argc, char *argv[])
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{
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if (argc < 2)
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{
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cerr << "Usage: " << argv[0] << " <font>" << endl;
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return 1;
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}
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if (SDL_Init(SDL_INIT_VIDEO))
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{
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cerr << "Failed to initialize SDL!" << endl;
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return 1;
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}
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atexit(SDL_Quit);
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SDL_Window * window = SDL_CreateWindow(argv[0],
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SDL_WINDOWPOS_UNDEFINED,
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SDL_WINDOWPOS_UNDEFINED,
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WIDTH,
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HEIGHT,
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SDL_WINDOW_OPENGL);
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if (!window)
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{
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cerr << "Failed to create window!" << endl;
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SDL_Quit();
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return 2;
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}
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SDL_GLContext gl_context = SDL_GL_CreateContext(window);
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if (gl3wInit() != 0)
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{
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cerr << "Failed to gl3wInit()" << endl;
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SDL_Quit();
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return 2;
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}
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if (!gl3wIsSupported(3, 0))
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{
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cerr << "OpenGL 3.0 is not supported!" << endl;
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SDL_Quit();
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return 2;
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}
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if (FT_Init_FreeType(&ft) != 0)
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{
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cerr << "Could not FT_Init_FreeType()" << endl;
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return 2;
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}
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if (FT_New_Face(ft, argv[1], 0, &face) != 0)
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{
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cerr << "Could not load font " << argv[1] << endl;
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return 2;
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}
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FT_Set_Pixel_Sizes(face, 0, 20);
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init();
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display(window);
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SDL_Event event;
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while (SDL_WaitEvent(&event))
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{
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if (event.type == SDL_QUIT)
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break;
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else if (event.type == SDL_KEYDOWN)
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{
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if (event.key.keysym.sym == SDLK_ESCAPE)
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break;
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if (event.key.keysym.sym == SDLK_RETURN)
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display(window);
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}
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}
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}
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