參考資訊:
https://wiki.libsdl.org/FrontPage
main.c
#include <stdio.h> #include <stdlib.h> #include <SDL.h> #include <SDL2_gfxPrimitives.h> int main(int argc, char **argv) { const int w = 320; const int h = 240; const int bpp = 16; char buf[255] = {0}; SDL_Window *window = NULL; SDL_Renderer *renderer = NULL; SDL_Init(SDL_INIT_VIDEO); window = SDL_CreateWindow("main", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, w, h, SDL_WINDOW_SHOWN); renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC); SDL_RenderClear(renderer); SDL_RenderPresent(renderer); SDL_Event event; while (1) { if (SDL_PollEvent(&event)) { if (event.type == SDL_MOUSEMOTION) { int x = 0, y = 0; SDL_GetMouseState(&x, &y); sprintf(buf, "mouse pos: %d %d", x, y); SDL_RenderClear(renderer); stringRGBA(renderer, 100, 100, buf, 0xff, 0xff, 0xff, 0xff); SDL_RenderPresent(renderer); } if ((event.type == SDL_MOUSEBUTTONUP) || (event.type == SDL_MOUSEBUTTONDOWN)) { break; } } SDL_Delay(15); } SDL_DestroyRenderer(renderer); SDL_DestroyWindow(window); SDL_Quit(); return 0; }
編譯、執行
$ gcc main.c -o main -lSDL2 -lSDL2_gfx -I/usr/include/SDL2 $ ./main