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annotate Xcode-iPhoneOS/Demos/src/rectangles.c @ 5225:1fbe1c202501

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Renamed SDL_Key to SDL_Keycode to clarify terminology.
author Sam Lantinga <slouken@libsdl.org>
date Mon, 07 Feb 2011 10:40:21 -0800
parents 78db79f5a4e2
children
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1 /*
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2 * rectangles.c
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3 * written by Holmes Futrell
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4 * use however you want
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5 */
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6
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7 #include "SDL.h"
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8 #include <time.h>
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9 #include "common.h"
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10
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11 void
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12 render(SDL_Renderer *renderer)
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13 {
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14
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15 Uint8 r, g, b;
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16 /* Come up with a random rectangle */
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17 SDL_Rect rect;
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18 rect.w = randomInt(64, 128);
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19 rect.h = randomInt(64, 128);
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20 rect.x = randomInt(0, SCREEN_WIDTH);
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21 rect.y = randomInt(0, SCREEN_HEIGHT);
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22
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23 /* Come up with a random color */
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24 r = randomInt(50, 255);
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25 g = randomInt(50, 255);
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26 b = randomInt(50, 255);
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27
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28 /* Fill the rectangle in the color */
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29 SDL_SetRenderDrawColor(renderer, r, g, b, 255);
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30 SDL_RenderFillRect(renderer, &rect);
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31
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32 /* update screen */
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33 SDL_RenderPresent(renderer);
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34
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35 }
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36
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37 int
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38 main(int argc, char *argv[])
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39 {
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40
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41 SDL_Window *window;
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42 SDL_Renderer *renderer;
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43 int done;
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44 SDL_Event event;
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45
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46 /* initialize SDL */
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47 if (SDL_Init(SDL_INIT_VIDEO) < 0) {
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48 fatalError("Could not initialize SDL");
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49 }
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50
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51 /* seed random number generator */
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52 srand(time(NULL));
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53
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54 /* create window and renderer */
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55 window =
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56 SDL_CreateWindow(NULL, 0, 0, SCREEN_WIDTH, SCREEN_HEIGHT,
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57 SDL_WINDOW_SHOWN);
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58 if (window == 0) {
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59 fatalError("Could not initialize Window");
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60 }
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61 renderer = SDL_CreateRenderer(window, -1, 0);
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62 if (!renderer) {
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63 fatalError("Could not create renderer");
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64 }
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65
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66 /* Fill screen with black */
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67 SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
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68 SDL_RenderClear(renderer);
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69
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70 /* Enter render loop, waiting for user to quit */
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71 done = 0;
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72 while (!done) {
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73 while (SDL_PollEvent(&event)) {
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74 if (event.type == SDL_QUIT) {
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75 done = 1;
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76 }
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77 }
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78 render(renderer);
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79 SDL_Delay(1);
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80 }
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81
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82 /* shutdown SDL */
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83 SDL_Quit();
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84
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85 return 0;
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86 }