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annotate XCodeiPhoneOS/Demos/src/rectangles.c @ 2808:368410632f2d

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Whoops, we need this for subrect updates (testsprite)
author Sam Lantinga <slouken@libsdl.org>
date Sat, 29 Nov 2008 15:32:14 +0000
parents f55c87ae336b
children 375ee92745e8
rev   line source
2765
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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(void)
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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_RenderFill(r, g, b, 255, &rect);
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30
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31 /* update screen */
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32 SDL_RenderPresent();
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33
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34 }
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35
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36 int
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37 main(int argc, char *argv[])
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38 {
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39
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40 SDL_WindowID windowID;
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41 int done;
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42 SDL_Event event;
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43
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44 /* initialize SDL */
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45 if (SDL_Init(SDL_INIT_VIDEO) < 0) {
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46 fatalError("Could not initialize SDL");
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47 }
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48
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49 /* seed random number generator */
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50 srand(time(NULL));
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51
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52 /* create window and renderer */
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53 windowID =
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54 SDL_CreateWindow(NULL, 0, 0, SCREEN_WIDTH, SCREEN_HEIGHT,
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55 SDL_WINDOW_SHOWN);
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56 if (windowID == 0) {
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57 fatalError("Could not initialize Window");
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58 }
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59 if (SDL_CreateRenderer(windowID, -1, 0) != 0) {
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60 fatalError("Could not create renderer");
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61 }
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62
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63 /* Fill screen with black */
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64 SDL_RenderFill(0, 0, 0, 0, NULL);
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65
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66 /* Enter render loop, waiting for user to quit */
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67 done = 0;
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68 while (!done) {
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69 while (SDL_PollEvent(&event)) {
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70 if (event.type == SDL_QUIT) {
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71 done = 1;
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72 }
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73 }
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74 render();
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75 SDL_Delay(1);
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76 }
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77
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78 /* shutdown SDL */
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79 SDL_Quit();
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80
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81 return 0;
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82 }