Mercurial > sdl-ios-xcode
annotate src/video/aalib/SDL_aavideo.c @ 4541:abb56f7699ea SDL-1.2
Fixed bug 936
Make sure that eip doesn't overflow the copy buffer beforehand. :)
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sun, 18 Jul 2010 10:08:06 -0700 |
| parents | a1b03ba2fcd0 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
| 4159 | 3 Copyright (C) 1997-2009 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
|
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6 modify it under the terms of the GNU Lesser General Public |
| 0 | 7 License as published by the Free Software Foundation; either |
|
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8 version 2.1 of the License, or (at your option) any later version. |
| 0 | 9 |
| 10 This library is distributed in the hope that it will be useful, | |
| 11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
|
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13 Lesser General Public License for more details. |
| 0 | 14 |
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15 You should have received a copy of the GNU Lesser General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 0 | 18 |
| 19 Sam Lantinga | |
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20 slouken@libsdl.org |
| 0 | 21 */ |
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22 #include "SDL_config.h" |
| 0 | 23 |
| 24 /* AAlib based SDL video driver implementation. | |
| 25 */ | |
| 26 | |
| 27 #include <unistd.h> | |
| 28 #include <sys/stat.h> | |
| 29 | |
| 30 | |
| 31 #include "SDL_video.h" | |
| 32 #include "SDL_mouse.h" | |
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33 #include "../SDL_sysvideo.h" |
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34 #include "../SDL_pixels_c.h" |
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35 #include "../../events/SDL_events_c.h" |
| 0 | 36 |
| 37 #include "SDL_aavideo.h" | |
| 38 #include "SDL_aaevents_c.h" | |
| 39 #include "SDL_aamouse_c.h" | |
| 40 | |
| 41 #include <aalib.h> | |
| 42 | |
| 43 /* Initialization/Query functions */ | |
| 44 static int AA_VideoInit(_THIS, SDL_PixelFormat *vformat); | |
| 45 static SDL_Rect **AA_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags); | |
| 46 static SDL_Surface *AA_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags); | |
| 47 static int AA_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors); | |
| 48 static void AA_VideoQuit(_THIS); | |
| 49 | |
| 50 /* Hardware surface functions */ | |
| 51 static int AA_AllocHWSurface(_THIS, SDL_Surface *surface); | |
| 52 static int AA_LockHWSurface(_THIS, SDL_Surface *surface); | |
| 53 static int AA_FlipHWSurface(_THIS, SDL_Surface *surface); | |
| 54 static void AA_UnlockHWSurface(_THIS, SDL_Surface *surface); | |
| 55 static void AA_FreeHWSurface(_THIS, SDL_Surface *surface); | |
| 56 | |
| 57 /* Cache the VideoDevice struct */ | |
| 58 static struct SDL_VideoDevice *local_this; | |
| 59 | |
| 60 /* AAlib driver bootstrap functions */ | |
| 61 | |
| 62 static int AA_Available(void) | |
| 63 { | |
| 64 return 1; /* Always available ! */ | |
| 65 } | |
| 66 | |
| 67 static void AA_DeleteDevice(SDL_VideoDevice *device) | |
| 68 { | |
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69 SDL_free(device->hidden); |
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70 SDL_free(device); |
| 0 | 71 } |
| 72 | |
| 73 static SDL_VideoDevice *AA_CreateDevice(int devindex) | |
| 74 { | |
| 75 SDL_VideoDevice *device; | |
| 76 | |
| 77 /* Initialize all variables that we clean on shutdown */ | |
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78 device = (SDL_VideoDevice *)SDL_malloc(sizeof(SDL_VideoDevice)); |
| 0 | 79 if ( device ) { |
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80 SDL_memset(device, 0, (sizeof *device)); |
| 0 | 81 device->hidden = (struct SDL_PrivateVideoData *) |
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82 SDL_malloc((sizeof *device->hidden)); |
| 0 | 83 } |
| 84 if ( (device == NULL) || (device->hidden == NULL) ) { | |
| 85 SDL_OutOfMemory(); | |
| 86 if ( device ) { | |
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87 SDL_free(device); |
| 0 | 88 } |
| 89 return(0); | |
| 90 } | |
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91 SDL_memset(device->hidden, 0, (sizeof *device->hidden)); |
| 0 | 92 |
| 93 /* Set the function pointers */ | |
| 94 device->VideoInit = AA_VideoInit; | |
| 95 device->ListModes = AA_ListModes; | |
| 96 device->SetVideoMode = AA_SetVideoMode; | |
| 97 device->CreateYUVOverlay = NULL; | |
| 98 device->SetColors = AA_SetColors; | |
| 99 device->UpdateRects = NULL; | |
| 100 device->VideoQuit = AA_VideoQuit; | |
| 101 device->AllocHWSurface = AA_AllocHWSurface; | |
| 102 device->CheckHWBlit = NULL; | |
| 103 device->FillHWRect = NULL; | |
| 104 device->SetHWColorKey = NULL; | |
| 105 device->SetHWAlpha = NULL; | |
| 106 device->LockHWSurface = AA_LockHWSurface; | |
| 107 device->UnlockHWSurface = AA_UnlockHWSurface; | |
| 108 device->FlipHWSurface = NULL; | |
| 109 device->FreeHWSurface = AA_FreeHWSurface; | |
| 110 device->SetCaption = NULL; | |
| 111 device->SetIcon = NULL; | |
| 112 device->IconifyWindow = NULL; | |
| 113 device->GrabInput = NULL; | |
| 114 device->GetWMInfo = NULL; | |
| 115 device->InitOSKeymap = AA_InitOSKeymap; | |
| 116 device->PumpEvents = AA_PumpEvents; | |
| 117 | |
| 118 device->free = AA_DeleteDevice; | |
| 119 | |
| 120 return device; | |
| 121 } | |
| 122 | |
| 123 VideoBootStrap AALIB_bootstrap = { | |
| 124 "aalib", "ASCII Art Library", | |
| 125 AA_Available, AA_CreateDevice | |
| 126 }; | |
| 127 | |
| 128 static void AA_ResizeHandler(aa_context *); | |
| 129 | |
| 130 int AA_VideoInit(_THIS, SDL_PixelFormat *vformat) | |
| 131 { | |
| 132 int keyboard; | |
| 133 int i; | |
| 134 | |
| 135 /* Initialize all variables that we clean on shutdown */ | |
| 136 for ( i=0; i<SDL_NUMMODES; ++i ) { | |
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137 SDL_modelist[i] = SDL_malloc(sizeof(SDL_Rect)); |
| 0 | 138 SDL_modelist[i]->x = SDL_modelist[i]->y = 0; |
| 139 } | |
| 140 /* Modes sorted largest to smallest */ | |
| 141 SDL_modelist[0]->w = 1024; SDL_modelist[0]->h = 768; | |
| 142 SDL_modelist[1]->w = 800; SDL_modelist[1]->h = 600; | |
| 143 SDL_modelist[2]->w = 640; SDL_modelist[2]->h = 480; | |
| 144 SDL_modelist[3]->w = 320; SDL_modelist[3]->h = 400; | |
| 145 SDL_modelist[4]->w = 320; SDL_modelist[4]->h = 240; | |
| 146 SDL_modelist[5]->w = 320; SDL_modelist[5]->h = 200; | |
| 147 SDL_modelist[6] = NULL; | |
| 148 | |
| 149 /* Initialize the library */ | |
| 150 | |
| 151 AA_mutex = SDL_CreateMutex(); | |
| 152 | |
| 153 aa_parseoptions (NULL, NULL, NULL, NULL); | |
| 154 | |
| 155 AA_context = aa_autoinit(&aa_defparams); | |
| 156 if ( ! AA_context ) { | |
| 157 SDL_SetError("Unable to initialize AAlib"); | |
| 158 return(-1); | |
| 159 } | |
| 160 | |
| 161 /* Enable mouse and keyboard support */ | |
| 162 | |
| 163 if ( ! aa_autoinitkbd (AA_context, AA_SENDRELEASE) ) { | |
| 164 SDL_SetError("Unable to initialize AAlib keyboard"); | |
| 165 return(-1); | |
| 166 } | |
| 167 if ( ! aa_autoinitmouse (AA_context, AA_SENDRELEASE) ) { | |
| 168 fprintf(stderr,"Warning: Unable to initialize AAlib mouse"); | |
| 169 } | |
| 170 AA_rparams = aa_getrenderparams(); | |
| 171 | |
| 172 local_this = this; | |
| 173 | |
| 174 aa_resizehandler(AA_context, AA_ResizeHandler); | |
| 175 | |
| 176 fprintf(stderr,"Using AAlib driver: %s (%s)\n", AA_context->driver->name, AA_context->driver->shortname); | |
| 177 | |
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178 AA_in_x11 = (SDL_strcmp(AA_context->driver->shortname,"X11") == 0); |
| 0 | 179 /* Determine the screen depth (use default 8-bit depth) */ |
| 180 vformat->BitsPerPixel = 8; | |
| 181 vformat->BytesPerPixel = 1; | |
| 182 | |
| 183 /* We're done! */ | |
| 184 return(0); | |
| 185 } | |
| 186 | |
| 187 SDL_Rect **AA_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags) | |
| 188 { | |
| 189 if(format->BitsPerPixel != 8) | |
| 190 return NULL; | |
| 191 | |
| 192 if ( flags & SDL_FULLSCREEN ) { | |
| 193 return SDL_modelist; | |
| 194 } else { | |
| 195 return (SDL_Rect **) -1; | |
| 196 } | |
| 197 } | |
| 198 | |
| 199 /* From aavga.c | |
| 200 AAlib does not give us the choice of the actual resolution, thus we have to simulate additional | |
| 201 resolution by scaling down manually each frame | |
| 202 */ | |
| 203 static void fastscale (register char *b1, register char *b2, int x1, int x2, int y1, int y2) | |
| 204 { | |
| 205 register int ex, spx = 0, ddx, ddx1; | |
| 206 int ddy1, ddy, spy = 0, ey; | |
| 207 int x; | |
| 208 char *bb1 = b1; | |
| 209 if (!x1 || !x2 || !y1 || !y2) | |
| 210 return; | |
| 211 ddx = x1 + x1; | |
| 212 ddx1 = x2 + x2; | |
| 213 if (ddx1 < ddx) | |
| 214 spx = ddx / ddx1, ddx %= ddx1; | |
| 215 ddy = y1 + y1; | |
| 216 ddy1 = y2 + y2; | |
| 217 if (ddy1 < ddy) | |
| 218 spy = (ddy / ddy1) * x1, ddy %= ddy1; | |
| 219 ey = -ddy1; | |
| 220 for (; y2; y2--) { | |
| 221 ex = -ddx1; | |
| 222 for (x = x2; x; x--) { | |
| 223 *b2 = *b1; | |
| 224 b2++; | |
| 225 b1 += spx; | |
| 226 ex += ddx; | |
| 227 if (ex > 0) { | |
| 228 b1++; | |
| 229 ex -= ddx1; | |
| 230 } | |
| 231 } | |
| 232 bb1 += spy; | |
| 233 ey += ddy; | |
| 234 if (ey > 0) { | |
| 235 bb1 += x1; | |
| 236 ey -= ddy1; | |
| 237 } | |
| 238 b1 = bb1; | |
| 239 } | |
| 240 } | |
| 241 | |
| 242 /* Various screen update functions available */ | |
| 243 static void AA_DirectUpdate(_THIS, int numrects, SDL_Rect *rects); | |
| 244 | |
| 245 SDL_Surface *AA_SetVideoMode(_THIS, SDL_Surface *current, | |
| 246 int width, int height, int bpp, Uint32 flags) | |
| 247 { | |
| 248 int mode; | |
| 249 | |
| 250 if ( AA_buffer ) { | |
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251 SDL_free( AA_buffer ); |
| 0 | 252 } |
| 253 | |
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254 AA_buffer = SDL_malloc(width * height); |
| 0 | 255 if ( ! AA_buffer ) { |
| 256 SDL_SetError("Couldn't allocate buffer for requested mode"); | |
| 257 return(NULL); | |
| 258 } | |
| 259 | |
| 260 /* printf("Setting mode %dx%d\n", width, height); */ | |
| 261 | |
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262 SDL_memset(aa_image(AA_context), 0, aa_imgwidth(AA_context) * aa_imgheight(AA_context)); |
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263 SDL_memset(AA_buffer, 0, width * height); |
| 0 | 264 |
| 265 /* Allocate the new pixel format for the screen */ | |
| 266 if ( ! SDL_ReallocFormat(current, 8, 0, 0, 0, 0) ) { | |
| 267 return(NULL); | |
| 268 } | |
| 269 | |
| 270 /* Set up the new mode framebuffer */ | |
| 271 current->flags = SDL_FULLSCREEN; | |
| 272 AA_w = current->w = width; | |
| 273 AA_h = current->h = height; | |
| 274 current->pitch = current->w; | |
| 275 current->pixels = AA_buffer; | |
| 276 | |
| 277 AA_x_ratio = ((double)aa_imgwidth(AA_context)) / ((double)width); | |
| 278 AA_y_ratio = ((double)aa_imgheight(AA_context)) / ((double)height); | |
| 279 | |
| 280 /* Set the blit function */ | |
| 281 this->UpdateRects = AA_DirectUpdate; | |
| 282 | |
| 283 /* We're done */ | |
| 284 return(current); | |
| 285 } | |
| 286 | |
| 287 static void AA_ResizeHandler(aa_context *context) | |
| 288 { | |
| 289 aa_resize(context); | |
| 290 local_this->hidden->x_ratio = ((double)aa_imgwidth(context)) / ((double)local_this->screen->w); | |
| 291 local_this->hidden->y_ratio = ((double)aa_imgheight(context)) / ((double)local_this->screen->h); | |
| 292 | |
| 293 fastscale (local_this->hidden->buffer, aa_image(context), local_this->hidden->w, aa_imgwidth (context), local_this->hidden->h, aa_imgheight (context)); | |
| 294 aa_renderpalette(context, local_this->hidden->palette, local_this->hidden->rparams, 0, 0, aa_scrwidth(context), aa_scrheight(context)); | |
| 295 aa_flush(context); | |
| 296 } | |
| 297 | |
| 298 /* We don't actually allow hardware surfaces other than the main one */ | |
| 299 static int AA_AllocHWSurface(_THIS, SDL_Surface *surface) | |
| 300 { | |
| 301 return(-1); | |
| 302 } | |
| 303 static void AA_FreeHWSurface(_THIS, SDL_Surface *surface) | |
| 304 { | |
| 305 return; | |
| 306 } | |
| 307 | |
| 308 /* We need to wait for vertical retrace on page flipped displays */ | |
| 309 static int AA_LockHWSurface(_THIS, SDL_Surface *surface) | |
| 310 { | |
| 311 /* TODO ? */ | |
| 312 return(0); | |
| 313 } | |
| 314 static void AA_UnlockHWSurface(_THIS, SDL_Surface *surface) | |
| 315 { | |
| 316 return; | |
| 317 } | |
| 318 | |
| 319 /* FIXME: How is this done with AAlib? */ | |
| 320 static int AA_FlipHWSurface(_THIS, SDL_Surface *surface) | |
| 321 { | |
| 322 SDL_mutexP(AA_mutex); | |
| 323 aa_flush(AA_context); | |
| 324 SDL_mutexV(AA_mutex); | |
| 325 return(0); | |
| 326 } | |
| 327 | |
| 328 static void AA_DirectUpdate(_THIS, int numrects, SDL_Rect *rects) | |
| 329 { | |
| 330 int i; | |
| 331 SDL_Rect *rect; | |
| 332 | |
| 333 fastscale (AA_buffer, aa_image(AA_context), AA_w, aa_imgwidth (AA_context), AA_h, aa_imgheight (AA_context)); | |
| 334 #if 1 | |
| 335 aa_renderpalette(AA_context, AA_palette, AA_rparams, 0, 0, aa_scrwidth(AA_context), aa_scrheight(AA_context)); | |
| 336 #else | |
| 337 /* Render only the rectangles in the list */ | |
| 338 printf("Update rects : "); | |
| 339 for ( i=0; i < numrects; ++i ) { | |
| 340 rect = &rects[i]; | |
| 341 printf("(%d,%d-%d,%d)", rect->x, rect->y, rect->w, rect->h); | |
| 342 aa_renderpalette(AA_context, AA_palette, AA_rparams, rect->x * AA_x_ratio, rect->y * AA_y_ratio, rect->w * AA_x_ratio, rect->h * AA_y_ratio); | |
| 343 } | |
| 344 printf("\n"); | |
| 345 #endif | |
| 346 SDL_mutexP(AA_mutex); | |
| 347 aa_flush(AA_context); | |
| 348 SDL_mutexV(AA_mutex); | |
| 349 return; | |
| 350 } | |
| 351 | |
| 352 int AA_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors) | |
| 353 { | |
| 354 int i; | |
| 355 | |
| 356 for ( i=0; i < ncolors; i++ ) { | |
| 357 aa_setpalette(AA_palette, firstcolor + i, | |
| 358 colors[i].r>>2, | |
| 359 colors[i].g>>2, | |
| 360 colors[i].b>>2); | |
| 361 } | |
| 362 return(1); | |
| 363 } | |
| 364 | |
| 365 /* Note: If we are terminated, this could be called in the middle of | |
| 366 another SDL video routine -- notably UpdateRects. | |
| 367 */ | |
| 368 void AA_VideoQuit(_THIS) | |
| 369 { | |
| 370 int i; | |
| 371 | |
| 372 aa_uninitkbd(AA_context); | |
| 373 aa_uninitmouse(AA_context); | |
| 374 | |
| 375 /* Free video mode lists */ | |
| 376 for ( i=0; i<SDL_NUMMODES; ++i ) { | |
| 377 if ( SDL_modelist[i] != NULL ) { | |
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378 SDL_free(SDL_modelist[i]); |
| 0 | 379 SDL_modelist[i] = NULL; |
| 380 } | |
| 381 } | |
| 382 | |
| 383 aa_close(AA_context); | |
| 384 | |
| 385 SDL_DestroyMutex(AA_mutex); | |
| 386 | |
| 387 this->screen->pixels = NULL; | |
| 388 } |