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annotate XCodeiPhoneOS/Demos/src/rectangles.c @ 2429:2c55b72ba46e gsoc2008_iphone

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testdyngles is exactly what it sounds like -- a version of testdyngl that uses OpenGL ES calls instead of OpenGL. Was necessary to create because glOrtho is called glOrthof in OpenGL ES, and OpenGL ES doesn't have glBegin() type semantics for specifying geometry.
author Holmes Futrell <hfutrell@umail.ucsb.edu>
date Fri, 15 Aug 2008 00:52:52 +0000
parents 0705e8ebe951
children
rev   line source
2385
0705e8ebe951 Rectangles demo (SDL_RenderFill)
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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 render(void) {
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12
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13 Uint8 r, g, b;
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14 /* Come up with a random rectangle */
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15 SDL_Rect rect;
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16 rect.w = randomInt(64, 128);
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17 rect.h = randomInt(64, 128);
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18 rect.x = randomInt(0, SCREEN_WIDTH);
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19 rect.y = randomInt(0, SCREEN_HEIGHT);
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20
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21 /* Come up with a random color */
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22 r = randomInt(50, 255);
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23 g = randomInt(50, 255);
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24 b = randomInt(50, 255);
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25
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26 /* Fill the rectangle in the color */
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27 SDL_RenderFill(r, g, b, 255, &rect);
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28
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29 /* update screen */
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30 SDL_RenderPresent();
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31
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32 }
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33
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34 int main(int argc, char *argv[]) {
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35
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36 SDL_WindowID windowID;
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37 int done;
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38 SDL_Event event;
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39
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40 /* initialize SDL */
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41 if (SDL_Init(SDL_INIT_VIDEO) < 0) {
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42 fatalError("Could not initialize SDL");
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43 }
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44
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45 /* seed random number generator */
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46 srand(time(NULL));
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47
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48 /* create window and renderer */
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49 windowID = SDL_CreateWindow(NULL, 0, 0, SCREEN_WIDTH, SCREEN_HEIGHT, SDL_WINDOW_SHOWN);
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50 if (windowID == 0) {
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51 fatalError("Could not initialize Window");
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52 }
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53 if (SDL_CreateRenderer(windowID, -1, 0) != 0) {
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54 fatalError("Could not create renderer");
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55 }
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56
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57 /* Fill screen with black */
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58 SDL_RenderFill(0,0,0,0, NULL);
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59
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60 /* Enter render loop, waiting for user to quit */
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61 done = 0;
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62 while(!done) {
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63 while (SDL_PollEvent(&event)) {
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64 if (event.type == SDL_QUIT) {
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65 done = 1;
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66 }
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67 }
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68 render();
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69 SDL_Delay(1);
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70 }
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71
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72 /* shutdown SDL */
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73 SDL_Quit();
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74
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75 return 0;
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76 }