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annotate Xcode-iPhoneOS/Template/SDL Application/main.c @ 5213:1be088cec098

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At least allow returning the values that were set.
author Sam Lantinga <slouken@libsdl.org>
date Sun, 06 Feb 2011 10:24:08 -0800
parents b6c7a6b07ebf
children
rev   line source
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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
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10 #define SCREEN_WIDTH 320
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11 #define SCREEN_HEIGHT 480
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12
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13 int
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14 randomInt(int min, int max)
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15 {
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16 return min + rand() % (max - min + 1);
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17 }
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18
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19 void
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20 render(void)
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21 {
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22
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23 Uint8 r, g, b;
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24 /* Come up with a random rectangle */
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25 SDL_Rect rect;
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26 rect.w = randomInt(64, 128);
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27 rect.h = randomInt(64, 128);
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28 rect.x = randomInt(0, SCREEN_WIDTH);
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29 rect.y = randomInt(0, SCREEN_HEIGHT);
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30
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31 /* Come up with a random color */
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32 r = randomInt(50, 255);
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33 g = randomInt(50, 255);
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34 b = randomInt(50, 255);
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35 SDL_SetRenderDrawColor(r, g, b, 255);
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36
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37 /* Fill the rectangle in the color */
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38 SDL_RenderFillRect(&rect);
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39
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40 /* update screen */
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41 SDL_RenderPresent();
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42
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43 }
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44
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45 int
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46 main(int argc, char *argv[])
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47 {
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48
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49 SDL_WindowID windowID;
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50 int done;
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51 SDL_Event event;
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52
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53 /* initialize SDL */
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54 if (SDL_Init(SDL_INIT_VIDEO) < 0) {
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55 printf("Could not initialize SDL\n");
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56 }
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57
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58 /* seed random number generator */
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59 srand(time(NULL));
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60
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61 /* create window and renderer */
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62 windowID =
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63 SDL_CreateWindow(NULL, 0, 0, SCREEN_WIDTH, SCREEN_HEIGHT,
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64 SDL_WINDOW_OPENGL | SDL_WINDOW_SHOWN);
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65 if (windowID == 0) {
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66 printf("Could not initialize Window\n");
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67 }
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68 if (SDL_CreateRenderer(windowID, -1, 0) != 0) {
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69 printf("Could not create renderer\n");
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70 }
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71
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72 /* Fill screen with black */
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73 SDL_RenderClear();
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74
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75 /* Enter render loop, waiting for user to quit */
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76 done = 0;
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77 while (!done) {
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78 while (SDL_PollEvent(&event)) {
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79 if (event.type == SDL_QUIT) {
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80 done = 1;
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81 }
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82 }
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83 render();
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84 SDL_Delay(1);
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85 }
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86
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87 /* shutdown SDL */
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88 SDL_Quit();
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89
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90 return 0;
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91 }