Mercurial > sdl-ios-xcode
annotate test/testbitmap.c @ 1674:7688a73b25b1 SDL-1.3
Finishing up keyboard code revamp, at least for now...
author | Sam Lantinga <slouken@libsdl.org> |
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date | Sun, 11 Jun 2006 05:27:10 +0000 |
parents | 4da1ee79c9af |
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rev | line source |
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0 | 1 |
2 /* Simple program: Test bitmap blits */ | |
3 | |
4 #include <stdio.h> | |
5 #include <stdlib.h> | |
6 #include <string.h> | |
7 | |
8 #include "SDL.h" | |
9 #include "picture.xbm" | |
10 | |
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11 /* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */ |
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12 static void |
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13 quit(int rc) |
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14 { |
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15 SDL_Quit(); |
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16 exit(rc); |
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17 } |
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18 |
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19 SDL_Surface * |
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20 LoadXBM(SDL_Surface * screen, int w, int h, Uint8 * bits) |
0 | 21 { |
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22 SDL_Surface *bitmap; |
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23 Uint8 *line; |
0 | 24 |
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25 /* Allocate the bitmap */ |
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26 bitmap = SDL_CreateRGBSurface(SDL_SWSURFACE, w, h, 1, 0, 0, 0, 0); |
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27 if (bitmap == NULL) { |
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28 fprintf(stderr, "Couldn't allocate bitmap: %s\n", SDL_GetError()); |
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29 return (NULL); |
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30 } |
0 | 31 |
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32 /* Copy the pixels */ |
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33 line = (Uint8 *) bitmap->pixels; |
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34 w = (w + 7) / 8; |
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35 while (h--) { |
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36 memcpy(line, bits, w); |
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37 /* X11 Bitmap images have the bits reversed */ |
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38 { |
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39 int i, j; |
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40 Uint8 *buf, byte; |
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41 for (buf = line, i = 0; i < w; ++i, ++buf) { |
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42 byte = *buf; |
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43 *buf = 0; |
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44 for (j = 7; j >= 0; --j) { |
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45 *buf |= (byte & 0x01) << j; |
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46 byte >>= 1; |
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47 } |
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48 } |
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49 } |
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50 line += bitmap->pitch; |
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51 bits += w; |
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52 } |
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53 return (bitmap); |
0 | 54 } |
55 | |
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56 int |
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57 main(int argc, char *argv[]) |
0 | 58 { |
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59 SDL_Surface *screen; |
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60 SDL_Surface *bitmap; |
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61 Uint8 video_bpp; |
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62 Uint32 videoflags; |
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63 Uint8 *buffer; |
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64 int i, k, done; |
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65 SDL_Event event; |
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66 Uint16 *buffer16; |
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67 Uint16 color; |
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68 Uint8 gradient; |
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69 SDL_Color palette[256]; |
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70 |
0 | 71 |
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72 /* Initialize SDL */ |
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73 if (SDL_Init(SDL_INIT_VIDEO) < 0) { |
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74 fprintf(stderr, "Couldn't initialize SDL: %s\n", SDL_GetError()); |
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75 return (1); |
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76 } |
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78 video_bpp = 0; |
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79 videoflags = SDL_SWSURFACE; |
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80 while (argc > 1) { |
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81 --argc; |
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82 if (strcmp(argv[argc - 1], "-bpp") == 0) { |
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83 video_bpp = atoi(argv[argc]); |
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84 --argc; |
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85 } else if (strcmp(argv[argc], "-warp") == 0) { |
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86 videoflags |= SDL_HWPALETTE; |
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87 } else if (strcmp(argv[argc], "-hw") == 0) { |
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88 videoflags |= SDL_HWSURFACE; |
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89 } else if (strcmp(argv[argc], "-fullscreen") == 0) { |
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90 videoflags |= SDL_FULLSCREEN; |
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91 } else { |
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92 fprintf(stderr, |
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93 "Usage: %s [-bpp N] [-warp] [-hw] [-fullscreen]\n", |
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94 argv[0]); |
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95 quit(1); |
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96 } |
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97 } |
0 | 98 |
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99 /* Set 640x480 video mode */ |
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100 if ((screen = SDL_SetVideoMode(640, 480, video_bpp, videoflags)) == NULL) { |
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101 fprintf(stderr, "Couldn't set 640x480x%d video mode: %s\n", |
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102 video_bpp, SDL_GetError()); |
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103 quit(2); |
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104 } |
0 | 105 |
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106 if (video_bpp == 8) { |
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107 /* Set a gray colormap, reverse order from white to black */ |
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108 for (i = 0; i < 256; ++i) { |
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109 palette[i].r = 255 - i; |
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110 palette[i].g = 255 - i; |
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111 palette[i].b = 255 - i; |
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112 } |
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113 SDL_SetColors(screen, palette, 0, 256); |
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114 } |
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115 |
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116 /* Set the surface pixels and refresh! */ |
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117 if (SDL_LockSurface(screen) < 0) { |
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118 fprintf(stderr, "Couldn't lock the display surface: %s\n", |
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119 SDL_GetError()); |
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120 quit(2); |
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121 } |
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122 buffer = (Uint8 *) screen->pixels; |
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123 if (screen->format->BytesPerPixel != 2) { |
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124 for (i = 0; i < screen->h; ++i) { |
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125 memset(buffer, (i * 255) / screen->h, screen->pitch); |
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126 buffer += screen->pitch; |
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127 } |
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128 } else { |
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129 for (i = 0; i < screen->h; ++i) { |
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130 gradient = ((i * 255) / screen->h); |
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131 color = SDL_MapRGB(screen->format, gradient, gradient, gradient); |
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132 buffer16 = (Uint16 *) buffer; |
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133 for (k = 0; k < screen->w; k++) { |
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134 *(buffer16 + k) = color; |
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135 } |
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136 buffer += screen->pitch; |
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137 } |
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138 } |
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139 SDL_UnlockSurface(screen); |
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140 SDL_UpdateRect(screen, 0, 0, 0, 0); |
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141 |
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142 /* Load the bitmap */ |
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143 bitmap = LoadXBM(screen, picture_width, picture_height, |
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144 (Uint8 *) picture_bits); |
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145 if (bitmap == NULL) { |
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146 quit(1); |
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147 } |
0 | 148 |
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149 /* Wait for a keystroke */ |
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150 done = 0; |
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151 while (!done) { |
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152 /* Check for events */ |
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153 while (SDL_PollEvent(&event)) { |
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154 switch (event.type) { |
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155 case SDL_MOUSEBUTTONDOWN: |
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156 { |
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157 SDL_Rect dst; |
0 | 158 |
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159 dst.x = event.button.x - bitmap->w / 2; |
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160 dst.y = event.button.y - bitmap->h / 2; |
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161 dst.w = bitmap->w; |
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162 dst.h = bitmap->h; |
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163 SDL_BlitSurface(bitmap, NULL, screen, &dst); |
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164 SDL_UpdateRects(screen, 1, &dst); |
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165 } |
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166 break; |
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167 case SDL_KEYDOWN: |
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168 /* Any key press quits the app... */ |
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169 done = 1; |
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170 break; |
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171 case SDL_QUIT: |
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172 done = 1; |
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173 break; |
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174 default: |
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175 break; |
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176 } |
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177 } |
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178 } |
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179 SDL_FreeSurface(bitmap); |
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180 SDL_Quit(); |
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181 return (0); |
0 | 182 } |