Mercurial > sdl-ios-xcode
annotate src/video/svga/SDL_svgavideo.c @ 67:3647c809813d
Support for SVGALib 2.0, thanks to Benjamin Joel Stover
author | Sam Lantinga <slouken@lokigames.com> |
---|---|
date | Sat, 16 Jun 2001 01:32:09 +0000 |
parents | cf2af46e9e2a |
children | 13161d3d349d |
rev | line source |
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0 | 1 /* |
2 SDL - Simple DirectMedia Layer | |
3 Copyright (C) 1997, 1998, 1999, 2000, 2001 Sam Lantinga | |
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 | |
20 slouken@devolution.com | |
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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Support for SVGALib 2.0, thanks to Benjamin Joel Stover
Sam Lantinga <slouken@lokigames.com>
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35 #include <sys/types.h> |
3647c809813d
Support for SVGALib 2.0, thanks to Benjamin Joel Stover
Sam Lantinga <slouken@lokigames.com>
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36 #include <sys/ioctl.h> |
3647c809813d
Support for SVGALib 2.0, thanks to Benjamin Joel Stover
Sam Lantinga <slouken@lokigames.com>
parents:
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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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Sam Lantinga <slouken@lokigames.com>
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83 |
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Sam Lantinga <slouken@lokigames.com>
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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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Sam Lantinga <slouken@lokigames.com>
parents:
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87 /* See if we are connected to a virtual terminal */ |
0 | 88 console = STDIN_FILENO; |
89 if ( console >= 0 ) { | |
90 struct stat sb; | |
91 struct vt_mode dummy; | |
92 | |
93 if ( (fstat(console, &sb) < 0) || | |
94 (ioctl(console, VT_GETMODE, &dummy) < 0) ) { | |
95 console = -1; | |
96 } | |
97 } | |
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Sam Lantinga <slouken@lokigames.com>
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98 |
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Sam Lantinga <slouken@lokigames.com>
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99 /* See if SVGAlib 2.0 is available */ |
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Sam Lantinga <slouken@lokigames.com>
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100 svgalib2 = open("/dev/svga", O_RDONLY); |
3647c809813d
Support for SVGALib 2.0, thanks to Benjamin Joel Stover
Sam Lantinga <slouken@lokigames.com>
parents:
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101 if (svgalib2 != -1) { |
3647c809813d
Support for SVGALib 2.0, thanks to Benjamin Joel Stover
Sam Lantinga <slouken@lokigames.com>
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102 close(svgalib2); |
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Support for SVGALib 2.0, thanks to Benjamin Joel Stover
Sam Lantinga <slouken@lokigames.com>
parents:
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103 } |
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Support for SVGALib 2.0, thanks to Benjamin Joel Stover
Sam Lantinga <slouken@lokigames.com>
parents:
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104 |
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Support for SVGALib 2.0, thanks to Benjamin Joel Stover
Sam Lantinga <slouken@lokigames.com>
parents:
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105 return(((svgalib2 != -1) || (geteuid() == 0)) && (console >= 0)); |
0 | 106 } |
107 | |
108 static void SVGA_DeleteDevice(SDL_VideoDevice *device) | |
109 { | |
110 free(device->hidden); | |
111 free(device); | |
112 } | |
113 | |
114 static SDL_VideoDevice *SVGA_CreateDevice(int devindex) | |
115 { | |
116 SDL_VideoDevice *device; | |
117 | |
118 /* Initialize all variables that we clean on shutdown */ | |
119 device = (SDL_VideoDevice *)malloc(sizeof(SDL_VideoDevice)); | |
120 if ( device ) { | |
121 memset(device, 0, (sizeof *device)); | |
122 device->hidden = (struct SDL_PrivateVideoData *) | |
123 malloc((sizeof *device->hidden)); | |
124 } | |
125 if ( (device == NULL) || (device->hidden == NULL) ) { | |
126 SDL_OutOfMemory(); | |
127 if ( device ) { | |
128 free(device); | |
129 } | |
130 return(0); | |
131 } | |
132 memset(device->hidden, 0, (sizeof *device->hidden)); | |
133 | |
134 /* Set the function pointers */ | |
135 device->VideoInit = SVGA_VideoInit; | |
136 device->ListModes = SVGA_ListModes; | |
137 device->SetVideoMode = SVGA_SetVideoMode; | |
138 device->SetColors = SVGA_SetColors; | |
139 device->UpdateRects = NULL; | |
140 device->VideoQuit = SVGA_VideoQuit; | |
141 device->AllocHWSurface = SVGA_AllocHWSurface; | |
142 device->CheckHWBlit = NULL; | |
143 device->FillHWRect = NULL; | |
144 device->SetHWColorKey = NULL; | |
145 device->SetHWAlpha = NULL; | |
146 device->LockHWSurface = SVGA_LockHWSurface; | |
147 device->UnlockHWSurface = SVGA_UnlockHWSurface; | |
148 device->FlipHWSurface = NULL; | |
149 device->FreeHWSurface = SVGA_FreeHWSurface; | |
150 device->SetCaption = NULL; | |
151 device->SetIcon = NULL; | |
152 device->IconifyWindow = NULL; | |
153 device->GrabInput = NULL; | |
154 device->GetWMInfo = NULL; | |
155 device->InitOSKeymap = SVGA_InitOSKeymap; | |
156 device->PumpEvents = SVGA_PumpEvents; | |
157 | |
158 device->free = SVGA_DeleteDevice; | |
159 | |
160 return device; | |
161 } | |
162 | |
163 VideoBootStrap SVGALIB_bootstrap = { | |
164 "svgalib", "SVGAlib", | |
165 SVGA_Available, SVGA_CreateDevice | |
166 }; | |
167 | |
168 static int SVGA_AddMode(_THIS, int mode, int actually_add, int force) | |
169 { | |
170 vga_modeinfo *modeinfo; | |
171 | |
172 modeinfo = vga_getmodeinfo(mode); | |
173 if ( force || ( modeinfo->flags & CAPABLE_LINEAR ) ) { | |
174 int i, j; | |
175 | |
176 i = modeinfo->bytesperpixel-1; | |
177 if ( actually_add ) { | |
178 SDL_Rect saved_rect[2]; | |
179 int saved_mode[2]; | |
180 int b; | |
181 | |
182 /* Add the mode, sorted largest to smallest */ | |
183 b = 0; | |
184 j = 0; | |
185 while ( (SDL_modelist[i][j]->w > modeinfo->width) || | |
186 (SDL_modelist[i][j]->h > modeinfo->height) ) { | |
187 ++j; | |
188 } | |
189 /* Skip modes that are already in our list */ | |
190 if ( (SDL_modelist[i][j]->w == modeinfo->width) && | |
191 (SDL_modelist[i][j]->h == modeinfo->height) ) { | |
192 return(0); | |
193 } | |
194 /* Insert the new mode */ | |
195 saved_rect[b] = *SDL_modelist[i][j]; | |
196 saved_mode[b] = SDL_vgamode[i][j]; | |
197 SDL_modelist[i][j]->w = modeinfo->width; | |
198 SDL_modelist[i][j]->h = modeinfo->height; | |
199 SDL_vgamode[i][j] = mode; | |
200 /* Everybody scoot down! */ | |
201 if ( saved_rect[b].w && saved_rect[b].h ) { | |
202 for ( ++j; SDL_modelist[i][j]->w; ++j ) { | |
203 saved_rect[!b] = *SDL_modelist[i][j]; | |
204 saved_mode[!b] = SDL_vgamode[i][j]; | |
205 *SDL_modelist[i][j] = saved_rect[b]; | |
206 SDL_vgamode[i][j] = saved_mode[b]; | |
207 b = !b; | |
208 } | |
209 *SDL_modelist[i][j] = saved_rect[b]; | |
210 SDL_vgamode[i][j] = saved_mode[b]; | |
211 } | |
212 } else { | |
213 ++SDL_nummodes[i]; | |
214 } | |
215 } | |
216 return( force || ( modeinfo->flags & CAPABLE_LINEAR ) ); | |
217 } | |
218 | |
219 static void SVGA_UpdateVideoInfo(_THIS) | |
220 { | |
221 vga_modeinfo *modeinfo; | |
222 | |
223 this->info.wm_available = 0; | |
224 this->info.hw_available = 1; | |
225 modeinfo = vga_getmodeinfo(vga_getcurrentmode()); | |
226 this->info.video_mem = (modeinfo->maxpixels/1024); | |
227 if ( modeinfo->bytesperpixel > 0 ) { | |
228 this->info.video_mem *= modeinfo->bytesperpixel; | |
229 } | |
230 /* FIXME: Add hardware accelerated blit information */ | |
231 #if 0 | |
232 printf("Hardware accelerated blit: %savailable\n", modeinfo->haveblit ? "" : "not "); | |
233 #endif | |
234 } | |
235 | |
236 int SVGA_VideoInit(_THIS, SDL_PixelFormat *vformat) | |
237 { | |
238 int keyboard; | |
239 int i, j; | |
240 int mode, total_modes; | |
241 | |
242 /* Initialize all variables that we clean on shutdown */ | |
243 for ( i=0; i<NUM_MODELISTS; ++i ) { | |
244 SDL_nummodes[i] = 0; | |
245 SDL_modelist[i] = NULL; | |
246 SDL_vgamode[i] = NULL; | |
247 } | |
248 | |
249 /* Initialize the library */ | |
250 vga_disabledriverreport(); | |
251 if ( vga_init() < 0 ) { | |
252 SDL_SetError("Unable to initialize SVGAlib"); | |
253 return(-1); | |
254 } | |
255 vga_setmode(TEXT); | |
256 | |
257 /* Enable mouse and keyboard support */ | |
258 vga_setmousesupport(1); | |
259 keyboard = keyboard_init_return_fd(); | |
260 if ( keyboard < 0 ) { | |
261 SDL_SetError("Unable to initialize keyboard"); | |
262 return(-1); | |
263 } | |
264 if ( SVGA_initkeymaps(keyboard) < 0 ) { | |
265 return(-1); | |
266 } | |
267 keyboard_seteventhandler(SVGA_keyboardcallback); | |
268 | |
269 /* Determine the screen depth (use default 8-bit depth) */ | |
270 vformat->BitsPerPixel = 8; | |
271 | |
272 /* Enumerate the available fullscreen modes */ | |
273 total_modes = 0; | |
274 for ( mode=vga_lastmodenumber(); mode; --mode ) { | |
275 if ( vga_hasmode(mode) ) { | |
276 if ( SVGA_AddMode(this, mode, 0, 0) ) { | |
277 ++total_modes; | |
278 } | |
279 } | |
280 } | |
281 if ( SVGA_AddMode(this, G320x200x256, 0, 1) ) ++total_modes; | |
282 if ( total_modes == 0 ) { | |
283 SDL_SetError("No linear video modes available"); | |
284 return(-1); | |
285 } | |
286 for ( i=0; i<NUM_MODELISTS; ++i ) { | |
287 SDL_vgamode[i] = (int *)malloc(SDL_nummodes[i]*sizeof(int)); | |
288 if ( SDL_vgamode[i] == NULL ) { | |
289 SDL_OutOfMemory(); | |
290 return(-1); | |
291 } | |
292 SDL_modelist[i] = (SDL_Rect **) | |
293 malloc((SDL_nummodes[i]+1)*sizeof(SDL_Rect *)); | |
294 if ( SDL_modelist[i] == NULL ) { | |
295 SDL_OutOfMemory(); | |
296 return(-1); | |
297 } | |
298 for ( j=0; j<SDL_nummodes[i]; ++j ) { | |
299 SDL_modelist[i][j]=(SDL_Rect *)malloc(sizeof(SDL_Rect)); | |
300 if ( SDL_modelist[i][j] == NULL ) { | |
301 SDL_OutOfMemory(); | |
302 return(-1); | |
303 } | |
304 memset(SDL_modelist[i][j], 0, sizeof(SDL_Rect)); | |
305 } | |
306 SDL_modelist[i][j] = NULL; | |
307 } | |
308 for ( mode=vga_lastmodenumber(); mode; --mode ) { | |
309 if ( vga_hasmode(mode) ) { | |
310 SVGA_AddMode(this, mode, 1, 0); | |
311 } | |
312 } | |
313 SVGA_AddMode(this, G320x200x256, 1, 1); | |
314 | |
315 /* Free extra (duplicated) modes */ | |
316 for ( i=0; i<NUM_MODELISTS; ++i ) { | |
317 j = 0; | |
318 while ( SDL_modelist[i][j] && SDL_modelist[i][j]->w ) { | |
319 j++; | |
320 } | |
321 while ( SDL_modelist[i][j] ) { | |
322 free(SDL_modelist[i][j]); | |
323 SDL_modelist[i][j] = NULL; | |
324 j++; | |
325 } | |
326 } | |
327 | |
328 /* Fill in our hardware acceleration capabilities */ | |
329 SVGA_UpdateVideoInfo(this); | |
330 | |
331 /* We're done! */ | |
332 return(0); | |
333 } | |
334 | |
335 SDL_Rect **SVGA_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags) | |
336 { | |
337 return(SDL_modelist[((format->BitsPerPixel+7)/8)-1]); | |
338 } | |
339 | |
340 /* Various screen update functions available */ | |
341 static void SVGA_DirectUpdate(_THIS, int numrects, SDL_Rect *rects); | |
342 static void SVGA_BankedUpdate(_THIS, int numrects, SDL_Rect *rects); | |
343 | |
344 SDL_Surface *SVGA_SetVideoMode(_THIS, SDL_Surface *current, | |
345 int width, int height, int bpp, Uint32 flags) | |
346 { | |
347 int mode; | |
348 int vgamode; | |
349 vga_modeinfo *modeinfo; | |
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 | |
396 /* Set the blit function */ | |
397 this->UpdateRects = SVGA_DirectUpdate; | |
398 | |
399 /* Set up the mouse handler again (buggy SVGAlib 1.40) */ | |
400 mouse_seteventhandler(SVGA_mousecallback); | |
401 | |
402 /* We're done */ | |
403 return(current); | |
404 } | |
405 | |
406 /* We don't actually allow hardware surfaces other than the main one */ | |
407 static int SVGA_AllocHWSurface(_THIS, SDL_Surface *surface) | |
408 { | |
409 return(-1); | |
410 } | |
411 static void SVGA_FreeHWSurface(_THIS, SDL_Surface *surface) | |
412 { | |
413 return; | |
414 } | |
415 | |
416 /* We need to wait for vertical retrace on page flipped displays */ | |
417 static int SVGA_LockHWSurface(_THIS, SDL_Surface *surface) | |
418 { | |
419 if ( (surface->flags & SDL_DOUBLEBUF) == SDL_DOUBLEBUF ) { | |
420 vga_waitretrace(); | |
421 } | |
422 return(0); | |
423 } | |
424 static void SVGA_UnlockHWSurface(_THIS, SDL_Surface *surface) | |
425 { | |
426 return; | |
427 } | |
428 | |
429 /* FIXME: How is this done with SVGAlib? */ | |
430 static int SVGA_FlipHWSurface(_THIS, SDL_Surface *surface) | |
431 { | |
432 return(0); | |
433 } | |
434 | |
435 static void SVGA_DirectUpdate(_THIS, int numrects, SDL_Rect *rects) | |
436 { | |
437 return; | |
438 } | |
439 | |
440 /* FIXME: Can this be used under SVGAlib? */ | |
441 static void SVGA_BankedUpdate(_THIS, int numrects, SDL_Rect *rects) | |
442 { | |
443 return; | |
444 } | |
445 | |
446 int SVGA_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors) | |
447 { | |
448 int i; | |
449 | |
450 for(i = 0; i < ncolors; i++) { | |
451 vga_setpalette(firstcolor + i, | |
452 colors[i].r>>2, | |
453 colors[i].g>>2, | |
454 colors[i].b>>2); | |
455 } | |
456 return(1); | |
457 } | |
458 | |
459 /* Note: If we are terminated, this could be called in the middle of | |
460 another SDL video routine -- notably UpdateRects. | |
461 */ | |
462 void SVGA_VideoQuit(_THIS) | |
463 { | |
464 int i, j; | |
465 | |
466 /* Reset the console video mode */ | |
467 if ( this->screen && (this->screen->w && this->screen->h) ) { | |
468 vga_setmode(TEXT); | |
469 } | |
470 keyboard_close(); | |
471 | |
472 /* Free video mode lists */ | |
473 for ( i=0; i<NUM_MODELISTS; ++i ) { | |
474 if ( SDL_modelist[i] != NULL ) { | |
475 for ( j=0; SDL_modelist[i][j]; ++j ) | |
476 free(SDL_modelist[i][j]); | |
477 free(SDL_modelist[i]); | |
478 SDL_modelist[i] = NULL; | |
479 } | |
480 if ( SDL_vgamode[i] != NULL ) { | |
481 free(SDL_vgamode[i]); | |
482 SDL_vgamode[i] = NULL; | |
483 } | |
484 } | |
485 if ( this->screen && (this->screen->flags & SDL_HWSURFACE) ) { | |
486 /* Direct screen access, no memory buffer */ | |
487 this->screen->pixels = NULL; | |
488 } | |
489 } |