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Merged Edgar's code changes from Google Summer of Code 2009
author Sam Lantinga <slouken@libsdl.org>
date Mon, 07 Sep 2009 05:06:34 +0000
parents
children 0acec8c9f5c9
rev   line source
3259
22ac66da0765 Merged Edgar's code changes from Google Summer of Code 2009
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1 /**
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2 * Automated SDL_Surface test.
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3 *
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4 * Written by Edgar Simo "bobbens"
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5 *
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6 * Released under Public Domain.
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7 */
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8
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9
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10 #include "SDL.h"
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11 #include "SDL_at.h"
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12
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13 #include "common/common.h"
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14
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15
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16 /**
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17 * @brief Compares a surface and a surface image for equality.
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18 */
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19 int surface_compare( SDL_Surface *sur, const SurfaceImage_t *img )
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20 {
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21 int ret;
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22 int i,j;
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23 int bpp;
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24 Uint8 *p, *pd;
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25
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26 /* Make sure size is the same. */
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27 if ((sur->w != img->width) || (sur->h != img->height))
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28 return -1;
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29
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30 SDL_LockSurface( sur );
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31
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32 ret = 0;
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33 bpp = sur->format->BytesPerPixel;
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34
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35 /* Compare image - should be same format. */
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36 for (j=0; j<sur->h; j++) {
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37 for (i=0; i<sur->w; i++) {
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38 p = (Uint8 *)sur->pixels + j * sur->pitch + i * bpp;
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39 pd = (Uint8 *)img->pixel_data + (j*img->width + i) * img->bytes_per_pixel;
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40 switch (bpp) {
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41 case 1:
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42 case 2:
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43 case 3:
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44 ret += 1;
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45 printf("%d BPP not supported yet.\n",bpp);
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46 break;
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47
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48 case 4:
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49 ret += !( (p[0] == pd[0]) &&
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50 (p[1] == pd[1]) &&
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51 (p[2] == pd[2]) );
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52 break;
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53 }
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54 }
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55 }
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56
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57 SDL_UnlockSurface( sur );
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58
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59 return ret;
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60 }