sdl

FORK: Simple Directmedia Layer
git clone https://git.neptards.moe/neptards/sdl.git
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main.c (2040B)

      1 /*
      2  *  rectangles.c
      3  *  written by Holmes Futrell
      4  *  use however you want
      5  */
      6 
      7 #include "SDL.h"
      8 #include <stdio.h>
      9 #include <stdlib.h>
     10 #include <time.h>
     11 
     12 #define SCREEN_WIDTH 320
     13 #define SCREEN_HEIGHT 480
     14 
     15 int
     16 randomInt(int min, int max)
     17 {
     18     return min + rand() % (max - min + 1);
     19 }
     20 
     21 void
     22 render(SDL_Renderer *renderer)
     23 {
     24 
     25     SDL_Rect rect;
     26     Uint8 r, g, b;
     27 
     28     /* Clear the screen */
     29     SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
     30     SDL_RenderClear(renderer);
     31 
     32     /*  Come up with a random rectangle */
     33     rect.w = randomInt(64, 128);
     34     rect.h = randomInt(64, 128);
     35     rect.x = randomInt(0, SCREEN_WIDTH);
     36     rect.y = randomInt(0, SCREEN_HEIGHT);
     37 
     38     /* Come up with a random color */
     39     r = randomInt(50, 255);
     40     g = randomInt(50, 255);
     41     b = randomInt(50, 255);
     42     SDL_SetRenderDrawColor(renderer, r, g, b, 255);
     43 
     44     /*  Fill the rectangle in the color */
     45     SDL_RenderFillRect(renderer, &rect);
     46 
     47     /* update screen */
     48     SDL_RenderPresent(renderer);
     49 }
     50 
     51 int
     52 main(int argc, char *argv[])
     53 {
     54 
     55     SDL_Window *window;
     56     SDL_Renderer *renderer;
     57     int done;
     58     SDL_Event event;
     59 
     60     /* initialize SDL */
     61     if (SDL_Init(SDL_INIT_VIDEO) < 0) {
     62         printf("Could not initialize SDL\n");
     63         return 1;
     64     }
     65 
     66     /* seed random number generator */
     67     srand(time(NULL));
     68 
     69     /* create window and renderer */
     70     window =
     71         SDL_CreateWindow(NULL, 0, 0, SCREEN_WIDTH, SCREEN_HEIGHT,
     72                          SDL_WINDOW_OPENGL);
     73     if (!window) {
     74         printf("Could not initialize Window\n");
     75         return 1;
     76     }
     77 
     78     renderer = SDL_CreateRenderer(window, -1, 0);
     79     if (!renderer) {
     80         printf("Could not create renderer\n");
     81         return 1;
     82     }
     83 
     84     /* Enter render loop, waiting for user to quit */
     85     done = 0;
     86     while (!done) {
     87         while (SDL_PollEvent(&event)) {
     88             if (event.type == SDL_QUIT) {
     89                 done = 1;
     90             }
     91         }
     92         render(renderer);
     93         SDL_Delay(1);
     94     }
     95 
     96     /* shutdown SDL */
     97     SDL_Quit();
     98 
     99     return 0;
    100 }