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annotate test/automated/common/common.c @ 3638:6e70cf55a368

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Removed incorrect SDL_GetAudioDeviceName() call from loopwave.c. SDL_GetAudioDeviceName(1, 0) does not mean "name of the default output device."
author Ryan C. Gordon <icculus@icculus.org>
date Mon, 11 Jan 2010 07:58:55 +0000
parents 5f038ec1a1af
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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.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, int allowable_error )
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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 {
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50 int dist = 0;
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51 Uint8 R, G, B, A;
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52
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53 SDL_GetRGBA(*(Uint32*)p, sur->format, &R, &G, &B, &A);
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54
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55 if (img->bytes_per_pixel == 3) {
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56 dist += (R-pd[0])*(R-pd[0]);
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57 dist += (G-pd[1])*(G-pd[1]);
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58 dist += (B-pd[2])*(B-pd[2]);
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59 } else {
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60 dist += (R-pd[0])*(R-pd[0]);
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61 dist += (G-pd[1])*(G-pd[1]);
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62 dist += (B-pd[2])*(B-pd[2]);
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63 dist += (A-pd[3])*(A-pd[3]);
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64 }
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65 /* Allow some difference in blending accuracy */
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66 if (dist > allowable_error) {
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67 /*printf("pixel %d,%d varies by %d\n", i, j, dist);*/
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68 ++ret;
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69 }
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70 }
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71 break;
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72 }
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73 }
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74 }
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75
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76 SDL_UnlockSurface( sur );
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77
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78 if (ret) {
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79 SDL_SaveBMP(sur, "fail.bmp");
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80
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81 SDL_LockSurface( sur );
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82
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83 bpp = sur->format->BytesPerPixel;
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84
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85 if (bpp == 4) {
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86 for (j=0; j<sur->h; j++) {
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87 for (i=0; i<sur->w; i++) {
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88 Uint8 R, G, B, A;
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89 p = (Uint8 *)sur->pixels + j * sur->pitch + i * bpp;
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90 pd = (Uint8 *)img->pixel_data + (j*img->width + i) * img->bytes_per_pixel;
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91
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92 R = pd[0];
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93 G = pd[1];
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94 B = pd[2];
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95 if (img->bytes_per_pixel == 4) {
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96 A = pd[3];
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97 } else {
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98 A = 0;
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99 }
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100 *(Uint32*)p = (A << 24) | (R << 16) | (G << 8) | B;
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101 }
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102 }
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103 }
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104
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105 SDL_UnlockSurface( sur );
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106
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107 SDL_SaveBMP(sur, "good.bmp");
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108 }
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109 return ret;
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110 }