test/testbitmap.c
branchSDL-1.3
changeset 1662 782fd950bd46
parent 1151 be9c9c8f6d53
child 1668 4da1ee79c9af
equal deleted inserted replaced
1661:281d3f4870e5 1662:782fd950bd46
     7 
     7 
     8 #include "SDL.h"
     8 #include "SDL.h"
     9 #include "picture.xbm"
     9 #include "picture.xbm"
    10 
    10 
    11 /* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
    11 /* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
    12 static void quit(int rc)
    12 static void
       
    13 quit (int rc)
    13 {
    14 {
    14 	SDL_Quit();
    15     SDL_Quit ();
    15 	exit(rc);
    16     exit (rc);
    16 }
    17 }
    17 
    18 
    18 SDL_Surface *LoadXBM(SDL_Surface *screen, int w, int h, Uint8 *bits)
    19 SDL_Surface *
       
    20 LoadXBM (SDL_Surface * screen, int w, int h, Uint8 * bits)
    19 {
    21 {
    20 	SDL_Surface *bitmap;
    22     SDL_Surface *bitmap;
    21 	Uint8 *line;
    23     Uint8 *line;
    22 
    24 
    23 	/* Allocate the bitmap */
    25     /* Allocate the bitmap */
    24 	bitmap = SDL_CreateRGBSurface(SDL_SWSURFACE, w, h, 1, 0, 0, 0, 0);
    26     bitmap = SDL_CreateRGBSurface (SDL_SWSURFACE, w, h, 1, 0, 0, 0, 0);
    25 	if ( bitmap == NULL ) {
    27     if (bitmap == NULL) {
    26 		fprintf(stderr, "Couldn't allocate bitmap: %s\n",
    28         fprintf (stderr, "Couldn't allocate bitmap: %s\n", SDL_GetError ());
    27 						SDL_GetError());
    29         return (NULL);
    28 		return(NULL);
    30     }
    29 	}
       
    30 
    31 
    31 	/* Copy the pixels */
    32     /* Copy the pixels */
    32 	line = (Uint8 *)bitmap->pixels;
    33     line = (Uint8 *) bitmap->pixels;
    33 	w = (w+7)/8;
    34     w = (w + 7) / 8;
    34 	while ( h-- ) {
    35     while (h--) {
    35 		memcpy(line, bits, w);
    36         memcpy (line, bits, w);
    36 		/* X11 Bitmap images have the bits reversed */
    37         /* X11 Bitmap images have the bits reversed */
    37 		{ int i, j; Uint8 *buf, byte;
    38         {
    38 			for ( buf=line, i=0; i<w; ++i, ++buf ) {
    39             int i, j;
    39 				byte = *buf;
    40             Uint8 *buf, byte;
    40 				*buf = 0;
    41             for (buf = line, i = 0; i < w; ++i, ++buf) {
    41 				for ( j=7; j>=0; --j ) {
    42                 byte = *buf;
    42 					*buf |= (byte&0x01)<<j;
    43                 *buf = 0;
    43 					byte >>= 1;
    44                 for (j = 7; j >= 0; --j) {
    44 				}
    45                     *buf |= (byte & 0x01) << j;
    45 			}
    46                     byte >>= 1;
    46 		}
    47                 }
    47 		line += bitmap->pitch;
    48             }
    48 		bits += w;
    49         }
    49 	}
    50         line += bitmap->pitch;
    50 	return(bitmap);
    51         bits += w;
       
    52     }
       
    53     return (bitmap);
    51 }
    54 }
    52 
    55 
    53 int main(int argc, char *argv[])
    56 int
       
    57 main (int argc, char *argv[])
    54 {
    58 {
    55 	SDL_Surface *screen;
    59     SDL_Surface *screen;
    56 	SDL_Surface *bitmap;
    60     SDL_Surface *bitmap;
    57 	Uint8  video_bpp;
    61     Uint8 video_bpp;
    58 	Uint32 videoflags;
    62     Uint32 videoflags;
    59 	Uint8 *buffer;
    63     Uint8 *buffer;
    60 	int i, k, done;
    64     int i, k, done;
    61 	SDL_Event event;
    65     SDL_Event event;
    62 	Uint16 *buffer16;
    66     Uint16 *buffer16;
    63         Uint16 color;
    67     Uint16 color;
    64         Uint8  gradient;
    68     Uint8 gradient;
    65 	SDL_Color palette[256];
    69     SDL_Color palette[256];
    66 
    70 
    67 
    71 
    68 	/* Initialize SDL */
    72     /* Initialize SDL */
    69 	if ( SDL_Init(SDL_INIT_VIDEO) < 0 ) {
    73     if (SDL_Init (SDL_INIT_VIDEO) < 0) {
    70 		fprintf(stderr, "Couldn't initialize SDL: %s\n",SDL_GetError());
    74         fprintf (stderr, "Couldn't initialize SDL: %s\n", SDL_GetError ());
    71 		return(1);
    75         return (1);
    72 	}
    76     }
    73 
    77 
    74 	video_bpp = 0;
    78     video_bpp = 0;
    75 	videoflags = SDL_SWSURFACE;
    79     videoflags = SDL_SWSURFACE;
    76 	while ( argc > 1 ) {
    80     while (argc > 1) {
    77 		--argc;
    81         --argc;
    78 		if ( strcmp(argv[argc-1], "-bpp") == 0 ) {
    82         if (strcmp (argv[argc - 1], "-bpp") == 0) {
    79 			video_bpp = atoi(argv[argc]);
    83             video_bpp = atoi (argv[argc]);
    80 			--argc;
    84             --argc;
    81 		} else
    85         } else if (strcmp (argv[argc], "-warp") == 0) {
    82 		if ( strcmp(argv[argc], "-warp") == 0 ) {
    86             videoflags |= SDL_HWPALETTE;
    83 			videoflags |= SDL_HWPALETTE;
    87         } else if (strcmp (argv[argc], "-hw") == 0) {
    84 		} else
    88             videoflags |= SDL_HWSURFACE;
    85 		if ( strcmp(argv[argc], "-hw") == 0 ) {
    89         } else if (strcmp (argv[argc], "-fullscreen") == 0) {
    86 			videoflags |= SDL_HWSURFACE;
    90             videoflags |= SDL_FULLSCREEN;
    87 		} else
    91         } else {
    88 		if ( strcmp(argv[argc], "-fullscreen") == 0 ) {
    92             fprintf (stderr,
    89 			videoflags |= SDL_FULLSCREEN;
    93                      "Usage: %s [-bpp N] [-warp] [-hw] [-fullscreen]\n",
    90 		} else {
    94                      argv[0]);
    91 			fprintf(stderr,
    95             quit (1);
    92 			"Usage: %s [-bpp N] [-warp] [-hw] [-fullscreen]\n",
    96         }
    93 								argv[0]);
    97     }
    94 			quit(1);
       
    95 		}
       
    96 	}
       
    97 
    98 
    98 	/* Set 640x480 video mode */
    99     /* Set 640x480 video mode */
    99 	if ( (screen=SDL_SetVideoMode(640,480,video_bpp,videoflags)) == NULL ) {
   100     if ((screen = SDL_SetVideoMode (640, 480, video_bpp, videoflags)) == NULL) {
   100 		fprintf(stderr, "Couldn't set 640x480x%d video mode: %s\n",
   101         fprintf (stderr, "Couldn't set 640x480x%d video mode: %s\n",
   101 						video_bpp, SDL_GetError());
   102                  video_bpp, SDL_GetError ());
   102 		quit(2);
   103         quit (2);
   103 	}
   104     }
   104 
   105 
   105 	if (video_bpp==8) {
   106     if (video_bpp == 8) {
   106 		/* Set a gray colormap, reverse order from white to black */
   107         /* Set a gray colormap, reverse order from white to black */
   107 		for ( i=0; i<256; ++i ) {
   108         for (i = 0; i < 256; ++i) {
   108 			palette[i].r = 255-i;
   109             palette[i].r = 255 - i;
   109 			palette[i].g = 255-i;
   110             palette[i].g = 255 - i;
   110 			palette[i].b = 255-i;
   111             palette[i].b = 255 - i;
   111 		}
   112         }
   112 		SDL_SetColors(screen, palette, 0, 256);
   113         SDL_SetColors (screen, palette, 0, 256);
   113 	}
   114     }
   114 
   115 
   115 	/* Set the surface pixels and refresh! */
   116     /* Set the surface pixels and refresh! */
   116 	if ( SDL_LockSurface(screen) < 0 ) {
   117     if (SDL_LockSurface (screen) < 0) {
   117 		fprintf(stderr, "Couldn't lock the display surface: %s\n",
   118         fprintf (stderr, "Couldn't lock the display surface: %s\n",
   118 							SDL_GetError());
   119                  SDL_GetError ());
   119 		quit(2);
   120         quit (2);
   120 	}
   121     }
   121 	buffer=(Uint8 *)screen->pixels;
   122     buffer = (Uint8 *) screen->pixels;
   122 	if (screen->format->BytesPerPixel!=2) {
   123     if (screen->format->BytesPerPixel != 2) {
   123         	for ( i=0; i<screen->h; ++i ) {
   124         for (i = 0; i < screen->h; ++i) {
   124         		memset(buffer,(i*255)/screen->h, screen->pitch);
   125             memset (buffer, (i * 255) / screen->h, screen->pitch);
   125         		buffer += screen->pitch;
   126             buffer += screen->pitch;
   126         	}
       
   127         }
   127         }
   128         else
   128     } else {
   129         {
   129         for (i = 0; i < screen->h; ++i) {
   130 		for ( i=0; i<screen->h; ++i ) {
   130             gradient = ((i * 255) / screen->h);
   131 			gradient=((i*255)/screen->h);
   131             color = SDL_MapRGB (screen->format, gradient, gradient, gradient);
   132                         color = SDL_MapRGB(screen->format, gradient, gradient, gradient);
   132             buffer16 = (Uint16 *) buffer;
   133                         buffer16=(Uint16*)buffer;
   133             for (k = 0; k < screen->w; k++) {
   134                         for (k=0; k<screen->w; k++)
   134                 *(buffer16 + k) = color;
   135                         {
   135             }
   136                             *(buffer16+k)=color;
   136             buffer += screen->pitch;
   137                         }
       
   138 			buffer += screen->pitch;
       
   139 		}
       
   140         }
   137         }
   141 	SDL_UnlockSurface(screen);
   138     }
   142 	SDL_UpdateRect(screen, 0, 0, 0, 0);
   139     SDL_UnlockSurface (screen);
       
   140     SDL_UpdateRect (screen, 0, 0, 0, 0);
   143 
   141 
   144 	/* Load the bitmap */
   142     /* Load the bitmap */
   145 	bitmap = LoadXBM(screen, picture_width, picture_height,
   143     bitmap = LoadXBM (screen, picture_width, picture_height,
   146 					(Uint8 *)picture_bits);
   144                       (Uint8 *) picture_bits);
   147 	if ( bitmap == NULL ) {
   145     if (bitmap == NULL) {
   148 		quit(1);
   146         quit (1);
   149 	}
   147     }
   150 
   148 
   151 	/* Wait for a keystroke */
   149     /* Wait for a keystroke */
   152 	done = 0;
   150     done = 0;
   153 	while ( !done ) {
   151     while (!done) {
   154 		/* Check for events */
   152         /* Check for events */
   155 		while ( SDL_PollEvent(&event) ) {
   153         while (SDL_PollEvent (&event)) {
   156 			switch (event.type) {
   154             switch (event.type) {
   157 				case SDL_MOUSEBUTTONDOWN: {
   155             case SDL_MOUSEBUTTONDOWN:
   158 					SDL_Rect dst;
   156                 {
       
   157                     SDL_Rect dst;
   159 
   158 
   160 					dst.x = event.button.x - bitmap->w/2;
   159                     dst.x = event.button.x - bitmap->w / 2;
   161 					dst.y = event.button.y - bitmap->h/2;
   160                     dst.y = event.button.y - bitmap->h / 2;
   162 					dst.w = bitmap->w;
   161                     dst.w = bitmap->w;
   163 					dst.h = bitmap->h;
   162                     dst.h = bitmap->h;
   164 					SDL_BlitSurface(bitmap, NULL,
   163                     SDL_BlitSurface (bitmap, NULL, screen, &dst);
   165 								screen, &dst);
   164                     SDL_UpdateRects (screen, 1, &dst);
   166 					SDL_UpdateRects(screen,1,&dst);
   165                 }
   167 					}
   166                 break;
   168 					break;
   167             case SDL_KEYDOWN:
   169 				case SDL_KEYDOWN:
   168                 /* Any key press quits the app... */
   170 					/* Any key press quits the app... */
   169                 done = 1;
   171 					done = 1;
   170                 break;
   172 					break;
   171             case SDL_QUIT:
   173 				case SDL_QUIT:
   172                 done = 1;
   174 					done = 1;
   173                 break;
   175 					break;
   174             default:
   176 				default:
   175                 break;
   177 					break;
   176             }
   178 			}
   177         }
   179 		}
   178     }
   180 	}
   179     SDL_FreeSurface (bitmap);
   181 	SDL_FreeSurface(bitmap);
   180     SDL_Quit ();
   182 	SDL_Quit();
   181     return (0);
   183 	return(0);
       
   184 }
   182 }