Mercurial > sdl-ios-xcode
annotate src/video/svga/SDL_svgavideo.c @ 1023:e719ee25439d
Fix potential use of freed memory in the threaded timer system
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Tue, 04 Jan 2005 19:05:32 +0000 |
| parents | b8d311d90021 |
| children | c9b51268668f |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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3 Copyright (C) 1997-2004 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
| 6 modify it under the terms of the GNU Library General Public | |
| 7 License as published by the Free Software Foundation; either | |
| 8 version 2 of the License, or (at your option) any later version. | |
| 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 | |
| 13 Library General Public License for more details. | |
| 14 | |
| 15 You should have received a copy of the GNU Library General Public | |
| 16 License along with this library; if not, write to the Free | |
| 17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 18 | |
| 19 Sam Lantinga | |
|
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20 slouken@libsdl.org |
| 0 | 21 */ |
| 22 | |
| 23 #ifdef SAVE_RCSID | |
| 24 static char rcsid = | |
| 25 "@(#) $Id$"; | |
| 26 #endif | |
| 27 | |
| 28 /* SVGAlib based SDL video driver implementation. | |
| 29 */ | |
| 30 | |
| 31 #include <stdlib.h> | |
| 32 #include <stdio.h> | |
| 33 #include <unistd.h> | |
| 34 #include <sys/stat.h> | |
|
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35 #include <sys/types.h> |
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36 #include <sys/ioctl.h> |
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37 #include <fcntl.h> |
| 0 | 38 |
| 39 #if defined(linux) | |
| 40 #include <linux/vt.h> | |
| 41 #elif defined(__FreeBSD__) | |
| 42 #include <sys/consio.h> | |
| 43 #else | |
| 44 #error You must choose your operating system here | |
| 45 #endif | |
| 46 #include <vga.h> | |
| 47 #include <vgamouse.h> | |
| 48 #include <vgakeyboard.h> | |
| 49 | |
| 50 #include "SDL.h" | |
| 51 #include "SDL_error.h" | |
| 52 #include "SDL_video.h" | |
| 53 #include "SDL_mouse.h" | |
| 54 #include "SDL_sysvideo.h" | |
| 55 #include "SDL_pixels_c.h" | |
| 56 #include "SDL_events_c.h" | |
| 57 #include "SDL_svgavideo.h" | |
| 58 #include "SDL_svgaevents_c.h" | |
| 59 #include "SDL_svgamouse_c.h" | |
| 60 | |
| 61 | |
| 62 /* Initialization/Query functions */ | |
| 63 static int SVGA_VideoInit(_THIS, SDL_PixelFormat *vformat); | |
| 64 static SDL_Rect **SVGA_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags); | |
| 65 static SDL_Surface *SVGA_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags); | |
| 66 static int SVGA_SetColors(_THIS, int firstcolor, int ncolors, | |
| 67 SDL_Color *colors); | |
| 68 static void SVGA_VideoQuit(_THIS); | |
| 69 | |
| 70 /* Hardware surface functions */ | |
| 71 static int SVGA_AllocHWSurface(_THIS, SDL_Surface *surface); | |
| 72 static int SVGA_LockHWSurface(_THIS, SDL_Surface *surface); | |
| 73 static int SVGA_FlipHWSurface(_THIS, SDL_Surface *surface); | |
| 74 static void SVGA_UnlockHWSurface(_THIS, SDL_Surface *surface); | |
| 75 static void SVGA_FreeHWSurface(_THIS, SDL_Surface *surface); | |
| 76 | |
| 77 /* SVGAlib driver bootstrap functions */ | |
| 78 | |
| 79 static int SVGA_Available(void) | |
| 80 { | |
| 81 /* Check to see if we are root and stdin is a virtual console */ | |
| 82 int console; | |
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83 |
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84 /* SVGALib 1.9.x+ doesn't require root (via /dev/svga) */ |
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85 int svgalib2 = -1; |
| 0 | 86 |
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87 /* See if we are connected to a virtual terminal */ |
| 0 | 88 console = STDIN_FILENO; |
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89 #if 0 /* This is no longer needed, SVGAlib can switch consoles for us */ |
| 0 | 90 if ( console >= 0 ) { |
| 91 struct stat sb; | |
| 92 struct vt_mode dummy; | |
| 93 | |
| 94 if ( (fstat(console, &sb) < 0) || | |
| 95 (ioctl(console, VT_GETMODE, &dummy) < 0) ) { | |
| 96 console = -1; | |
| 97 } | |
| 98 } | |
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99 #endif /* 0 */ |
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100 |
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101 /* See if SVGAlib 2.0 is available */ |
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102 svgalib2 = open("/dev/svga", O_RDONLY); |
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103 if (svgalib2 != -1) { |
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104 close(svgalib2); |
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105 } |
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106 |
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107 return(((svgalib2 != -1) || (geteuid() == 0)) && (console >= 0)); |
| 0 | 108 } |
| 109 | |
| 110 static void SVGA_DeleteDevice(SDL_VideoDevice *device) | |
| 111 { | |
| 112 free(device->hidden); | |
| 113 free(device); | |
| 114 } | |
| 115 | |
| 116 static SDL_VideoDevice *SVGA_CreateDevice(int devindex) | |
| 117 { | |
| 118 SDL_VideoDevice *device; | |
| 119 | |
| 120 /* Initialize all variables that we clean on shutdown */ | |
| 121 device = (SDL_VideoDevice *)malloc(sizeof(SDL_VideoDevice)); | |
| 122 if ( device ) { | |
| 123 memset(device, 0, (sizeof *device)); | |
| 124 device->hidden = (struct SDL_PrivateVideoData *) | |
| 125 malloc((sizeof *device->hidden)); | |
| 126 } | |
| 127 if ( (device == NULL) || (device->hidden == NULL) ) { | |
| 128 SDL_OutOfMemory(); | |
| 129 if ( device ) { | |
| 130 free(device); | |
| 131 } | |
| 132 return(0); | |
| 133 } | |
| 134 memset(device->hidden, 0, (sizeof *device->hidden)); | |
| 135 | |
| 136 /* Set the function pointers */ | |
| 137 device->VideoInit = SVGA_VideoInit; | |
| 138 device->ListModes = SVGA_ListModes; | |
| 139 device->SetVideoMode = SVGA_SetVideoMode; | |
| 140 device->SetColors = SVGA_SetColors; | |
| 141 device->UpdateRects = NULL; | |
| 142 device->VideoQuit = SVGA_VideoQuit; | |
| 143 device->AllocHWSurface = SVGA_AllocHWSurface; | |
| 144 device->CheckHWBlit = NULL; | |
| 145 device->FillHWRect = NULL; | |
| 146 device->SetHWColorKey = NULL; | |
| 147 device->SetHWAlpha = NULL; | |
| 148 device->LockHWSurface = SVGA_LockHWSurface; | |
| 149 device->UnlockHWSurface = SVGA_UnlockHWSurface; | |
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150 device->FlipHWSurface = SVGA_FlipHWSurface; |
| 0 | 151 device->FreeHWSurface = SVGA_FreeHWSurface; |
| 152 device->SetCaption = NULL; | |
| 153 device->SetIcon = NULL; | |
| 154 device->IconifyWindow = NULL; | |
| 155 device->GrabInput = NULL; | |
| 156 device->GetWMInfo = NULL; | |
| 157 device->InitOSKeymap = SVGA_InitOSKeymap; | |
| 158 device->PumpEvents = SVGA_PumpEvents; | |
| 159 | |
| 160 device->free = SVGA_DeleteDevice; | |
| 161 | |
| 162 return device; | |
| 163 } | |
| 164 | |
| 165 VideoBootStrap SVGALIB_bootstrap = { | |
| 166 "svgalib", "SVGAlib", | |
| 167 SVGA_Available, SVGA_CreateDevice | |
| 168 }; | |
| 169 | |
| 170 static int SVGA_AddMode(_THIS, int mode, int actually_add, int force) | |
| 171 { | |
| 172 vga_modeinfo *modeinfo; | |
| 173 | |
| 174 modeinfo = vga_getmodeinfo(mode); | |
| 175 if ( force || ( modeinfo->flags & CAPABLE_LINEAR ) ) { | |
| 176 int i, j; | |
| 177 | |
| 178 i = modeinfo->bytesperpixel-1; | |
| 179 if ( actually_add ) { | |
| 180 SDL_Rect saved_rect[2]; | |
| 181 int saved_mode[2]; | |
| 182 int b; | |
| 183 | |
| 184 /* Add the mode, sorted largest to smallest */ | |
| 185 b = 0; | |
| 186 j = 0; | |
| 187 while ( (SDL_modelist[i][j]->w > modeinfo->width) || | |
| 188 (SDL_modelist[i][j]->h > modeinfo->height) ) { | |
| 189 ++j; | |
| 190 } | |
| 191 /* Skip modes that are already in our list */ | |
| 192 if ( (SDL_modelist[i][j]->w == modeinfo->width) && | |
| 193 (SDL_modelist[i][j]->h == modeinfo->height) ) { | |
| 194 return(0); | |
| 195 } | |
| 196 /* Insert the new mode */ | |
| 197 saved_rect[b] = *SDL_modelist[i][j]; | |
| 198 saved_mode[b] = SDL_vgamode[i][j]; | |
| 199 SDL_modelist[i][j]->w = modeinfo->width; | |
| 200 SDL_modelist[i][j]->h = modeinfo->height; | |
| 201 SDL_vgamode[i][j] = mode; | |
| 202 /* Everybody scoot down! */ | |
| 203 if ( saved_rect[b].w && saved_rect[b].h ) { | |
| 204 for ( ++j; SDL_modelist[i][j]->w; ++j ) { | |
| 205 saved_rect[!b] = *SDL_modelist[i][j]; | |
| 206 saved_mode[!b] = SDL_vgamode[i][j]; | |
| 207 *SDL_modelist[i][j] = saved_rect[b]; | |
| 208 SDL_vgamode[i][j] = saved_mode[b]; | |
| 209 b = !b; | |
| 210 } | |
| 211 *SDL_modelist[i][j] = saved_rect[b]; | |
| 212 SDL_vgamode[i][j] = saved_mode[b]; | |
| 213 } | |
| 214 } else { | |
| 215 ++SDL_nummodes[i]; | |
| 216 } | |
| 217 } | |
| 218 return( force || ( modeinfo->flags & CAPABLE_LINEAR ) ); | |
| 219 } | |
| 220 | |
| 221 static void SVGA_UpdateVideoInfo(_THIS) | |
| 222 { | |
| 223 vga_modeinfo *modeinfo; | |
| 224 | |
| 225 this->info.wm_available = 0; | |
| 226 this->info.hw_available = 1; | |
| 227 modeinfo = vga_getmodeinfo(vga_getcurrentmode()); | |
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228 this->info.video_mem = modeinfo->memory; |
| 0 | 229 /* FIXME: Add hardware accelerated blit information */ |
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230 #ifdef SVGALIB_DEBUG |
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231 printf("Hardware accelerated blit: %savailable\n", modeinfo->haveblit ? "" : "not "); |
| 0 | 232 #endif |
| 233 } | |
| 234 | |
| 235 int SVGA_VideoInit(_THIS, SDL_PixelFormat *vformat) | |
| 236 { | |
| 237 int keyboard; | |
| 238 int i, j; | |
| 239 int mode, total_modes; | |
| 240 | |
| 241 /* Initialize all variables that we clean on shutdown */ | |
| 242 for ( i=0; i<NUM_MODELISTS; ++i ) { | |
| 243 SDL_nummodes[i] = 0; | |
| 244 SDL_modelist[i] = NULL; | |
| 245 SDL_vgamode[i] = NULL; | |
| 246 } | |
| 247 | |
| 248 /* Initialize the library */ | |
| 249 vga_disabledriverreport(); | |
| 250 if ( vga_init() < 0 ) { | |
| 251 SDL_SetError("Unable to initialize SVGAlib"); | |
| 252 return(-1); | |
| 253 } | |
| 254 vga_setmode(TEXT); | |
| 255 | |
| 256 /* Enable mouse and keyboard support */ | |
| 257 vga_setmousesupport(1); | |
| 258 keyboard = keyboard_init_return_fd(); | |
| 259 if ( keyboard < 0 ) { | |
| 260 SDL_SetError("Unable to initialize keyboard"); | |
| 261 return(-1); | |
| 262 } | |
| 263 if ( SVGA_initkeymaps(keyboard) < 0 ) { | |
| 264 return(-1); | |
| 265 } | |
| 266 keyboard_seteventhandler(SVGA_keyboardcallback); | |
| 267 | |
| 268 /* Determine the screen depth (use default 8-bit depth) */ | |
| 269 vformat->BitsPerPixel = 8; | |
| 270 | |
| 271 /* Enumerate the available fullscreen modes */ | |
| 272 total_modes = 0; | |
| 273 for ( mode=vga_lastmodenumber(); mode; --mode ) { | |
| 274 if ( vga_hasmode(mode) ) { | |
| 275 if ( SVGA_AddMode(this, mode, 0, 0) ) { | |
| 276 ++total_modes; | |
| 277 } | |
| 278 } | |
| 279 } | |
| 280 if ( SVGA_AddMode(this, G320x200x256, 0, 1) ) ++total_modes; | |
| 281 if ( total_modes == 0 ) { | |
| 282 SDL_SetError("No linear video modes available"); | |
| 283 return(-1); | |
| 284 } | |
| 285 for ( i=0; i<NUM_MODELISTS; ++i ) { | |
| 286 SDL_vgamode[i] = (int *)malloc(SDL_nummodes[i]*sizeof(int)); | |
| 287 if ( SDL_vgamode[i] == NULL ) { | |
| 288 SDL_OutOfMemory(); | |
| 289 return(-1); | |
| 290 } | |
| 291 SDL_modelist[i] = (SDL_Rect **) | |
| 292 malloc((SDL_nummodes[i]+1)*sizeof(SDL_Rect *)); | |
| 293 if ( SDL_modelist[i] == NULL ) { | |
| 294 SDL_OutOfMemory(); | |
| 295 return(-1); | |
| 296 } | |
| 297 for ( j=0; j<SDL_nummodes[i]; ++j ) { | |
| 298 SDL_modelist[i][j]=(SDL_Rect *)malloc(sizeof(SDL_Rect)); | |
| 299 if ( SDL_modelist[i][j] == NULL ) { | |
| 300 SDL_OutOfMemory(); | |
| 301 return(-1); | |
| 302 } | |
| 303 memset(SDL_modelist[i][j], 0, sizeof(SDL_Rect)); | |
| 304 } | |
| 305 SDL_modelist[i][j] = NULL; | |
| 306 } | |
| 307 for ( mode=vga_lastmodenumber(); mode; --mode ) { | |
| 308 if ( vga_hasmode(mode) ) { | |
| 309 SVGA_AddMode(this, mode, 1, 0); | |
| 310 } | |
| 311 } | |
| 312 SVGA_AddMode(this, G320x200x256, 1, 1); | |
| 313 | |
| 314 /* Free extra (duplicated) modes */ | |
| 315 for ( i=0; i<NUM_MODELISTS; ++i ) { | |
| 316 j = 0; | |
| 317 while ( SDL_modelist[i][j] && SDL_modelist[i][j]->w ) { | |
| 318 j++; | |
| 319 } | |
| 320 while ( SDL_modelist[i][j] ) { | |
| 321 free(SDL_modelist[i][j]); | |
| 322 SDL_modelist[i][j] = NULL; | |
| 323 j++; | |
| 324 } | |
| 325 } | |
| 326 | |
| 327 /* Fill in our hardware acceleration capabilities */ | |
| 328 SVGA_UpdateVideoInfo(this); | |
| 329 | |
| 330 /* We're done! */ | |
| 331 return(0); | |
| 332 } | |
| 333 | |
| 334 SDL_Rect **SVGA_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags) | |
| 335 { | |
| 336 return(SDL_modelist[((format->BitsPerPixel+7)/8)-1]); | |
| 337 } | |
| 338 | |
| 339 /* Various screen update functions available */ | |
| 340 static void SVGA_DirectUpdate(_THIS, int numrects, SDL_Rect *rects); | |
| 341 static void SVGA_BankedUpdate(_THIS, int numrects, SDL_Rect *rects); | |
| 342 | |
| 343 SDL_Surface *SVGA_SetVideoMode(_THIS, SDL_Surface *current, | |
| 344 int width, int height, int bpp, Uint32 flags) | |
| 345 { | |
| 346 int mode; | |
| 347 int vgamode; | |
| 348 vga_modeinfo *modeinfo; | |
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349 int screenpage_len; |
| 0 | 350 |
| 351 /* Try to set the requested linear video mode */ | |
| 352 bpp = (bpp+7)/8-1; | |
| 353 for ( mode=0; SDL_modelist[bpp][mode]; ++mode ) { | |
| 354 if ( (SDL_modelist[bpp][mode]->w == width) && | |
| 355 (SDL_modelist[bpp][mode]->h == height) ) { | |
| 356 break; | |
| 357 } | |
| 358 } | |
| 359 if ( SDL_modelist[bpp][mode] == NULL ) { | |
| 360 SDL_SetError("Couldn't find requested mode in list"); | |
| 361 return(NULL); | |
| 362 } | |
| 363 vga_setmode(SDL_vgamode[bpp][mode]); | |
| 364 vga_setpage(0); | |
| 365 | |
| 366 vgamode=SDL_vgamode[bpp][mode]; | |
| 367 if ((vga_setlinearaddressing()<0) && (vgamode!=G320x200x256)) { | |
| 368 SDL_SetError("Unable to set linear addressing"); | |
| 369 return(NULL); | |
| 370 } | |
| 371 modeinfo = vga_getmodeinfo(SDL_vgamode[bpp][mode]); | |
| 372 | |
| 373 /* Update hardware acceleration info */ | |
| 374 SVGA_UpdateVideoInfo(this); | |
| 375 | |
| 376 /* Allocate the new pixel format for the screen */ | |
| 377 bpp = (bpp+1)*8; | |
| 378 if ( (bpp == 16) && (modeinfo->colors == 32768) ) { | |
| 379 bpp = 15; | |
| 380 } | |
| 381 if ( ! SDL_ReallocFormat(current, bpp, 0, 0, 0, 0) ) { | |
| 382 return(NULL); | |
| 383 } | |
| 384 | |
| 385 /* Set up the new mode framebuffer */ | |
| 386 current->flags = (SDL_FULLSCREEN|SDL_HWSURFACE); | |
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387 if ( bpp == 8 ) { |
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388 /* FIXME: What about DirectColor? */ |
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389 current->flags |= SDL_HWPALETTE; |
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390 } |
| 0 | 391 current->w = width; |
| 392 current->h = height; | |
| 393 current->pitch = modeinfo->linewidth; | |
| 394 current->pixels = vga_getgraphmem(); | |
| 395 | |
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396 /* set double-buffering */ |
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397 if ( flags & SDL_DOUBLEBUF ) |
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398 { |
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399 /* length of one screen page in bytes */ |
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400 screenpage_len=current->h*modeinfo->linewidth; |
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401 |
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402 /* if start address should be aligned */ |
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403 if ( modeinfo->linewidth_unit ) |
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404 { |
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405 if ( screenpage_len % modeinfo->linewidth_unit ) |
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406 { |
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407 screenpage_len += modeinfo->linewidth_unit - ( screenpage_len % modeinfo->linewidth_unit ); |
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408 } |
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409 } |
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410 |
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411 /* if we heve enough videomemory = ak je dost videopamete */ |
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412 if ( modeinfo->memory > ( screenpage_len * 2 / 1024 ) ) |
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413 { |
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414 current->flags |= SDL_DOUBLEBUF; |
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415 flip_page = 0; |
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416 flip_offset[0] = 0; |
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417 flip_offset[1] = screenpage_len; |
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418 flip_address[0] = vga_getgraphmem(); |
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419 flip_address[1] = flip_address[0]+screenpage_len; |
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420 SVGA_FlipHWSurface(this,current); |
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421 } |
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422 } |
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423 |
| 0 | 424 /* Set the blit function */ |
| 425 this->UpdateRects = SVGA_DirectUpdate; | |
| 426 | |
| 427 /* Set up the mouse handler again (buggy SVGAlib 1.40) */ | |
| 428 mouse_seteventhandler(SVGA_mousecallback); | |
| 429 | |
| 430 /* We're done */ | |
| 431 return(current); | |
| 432 } | |
| 433 | |
| 434 /* We don't actually allow hardware surfaces other than the main one */ | |
| 435 static int SVGA_AllocHWSurface(_THIS, SDL_Surface *surface) | |
| 436 { | |
| 437 return(-1); | |
| 438 } | |
| 439 static void SVGA_FreeHWSurface(_THIS, SDL_Surface *surface) | |
| 440 { | |
| 441 return; | |
| 442 } | |
| 443 | |
| 444 /* We need to wait for vertical retrace on page flipped displays */ | |
| 445 static int SVGA_LockHWSurface(_THIS, SDL_Surface *surface) | |
| 446 { | |
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447 /* The waiting is done in SVGA_FlipHWSurface() */ |
| 0 | 448 return(0); |
| 449 } | |
| 450 static void SVGA_UnlockHWSurface(_THIS, SDL_Surface *surface) | |
| 451 { | |
| 452 return; | |
| 453 } | |
| 454 | |
| 455 static int SVGA_FlipHWSurface(_THIS, SDL_Surface *surface) | |
| 456 { | |
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457 vga_setdisplaystart(flip_offset[flip_page]); |
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458 flip_page=!flip_page; |
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459 surface->pixels=flip_address[flip_page]; |
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460 vga_waitretrace(); |
| 0 | 461 return(0); |
| 462 } | |
| 463 | |
| 464 static void SVGA_DirectUpdate(_THIS, int numrects, SDL_Rect *rects) | |
| 465 { | |
| 466 return; | |
| 467 } | |
| 468 | |
| 469 /* FIXME: Can this be used under SVGAlib? */ | |
| 470 static void SVGA_BankedUpdate(_THIS, int numrects, SDL_Rect *rects) | |
| 471 { | |
| 472 return; | |
| 473 } | |
| 474 | |
| 475 int SVGA_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors) | |
| 476 { | |
| 477 int i; | |
| 478 | |
| 479 for(i = 0; i < ncolors; i++) { | |
| 480 vga_setpalette(firstcolor + i, | |
| 481 colors[i].r>>2, | |
| 482 colors[i].g>>2, | |
| 483 colors[i].b>>2); | |
| 484 } | |
| 485 return(1); | |
| 486 } | |
| 487 | |
| 488 /* Note: If we are terminated, this could be called in the middle of | |
| 489 another SDL video routine -- notably UpdateRects. | |
| 490 */ | |
| 491 void SVGA_VideoQuit(_THIS) | |
| 492 { | |
| 493 int i, j; | |
| 494 | |
| 495 /* Reset the console video mode */ | |
| 496 if ( this->screen && (this->screen->w && this->screen->h) ) { | |
| 497 vga_setmode(TEXT); | |
| 498 } | |
| 499 keyboard_close(); | |
| 500 | |
| 501 /* Free video mode lists */ | |
| 502 for ( i=0; i<NUM_MODELISTS; ++i ) { | |
| 503 if ( SDL_modelist[i] != NULL ) { | |
| 504 for ( j=0; SDL_modelist[i][j]; ++j ) | |
| 505 free(SDL_modelist[i][j]); | |
| 506 free(SDL_modelist[i]); | |
| 507 SDL_modelist[i] = NULL; | |
| 508 } | |
| 509 if ( SDL_vgamode[i] != NULL ) { | |
| 510 free(SDL_vgamode[i]); | |
| 511 SDL_vgamode[i] = NULL; | |
| 512 } | |
| 513 } | |
| 514 if ( this->screen && (this->screen->flags & SDL_HWSURFACE) ) { | |
| 515 /* Direct screen access, no memory buffer */ | |
| 516 this->screen->pixels = NULL; | |
| 517 } | |
| 518 } | |
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519 |