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comparison src/video/svga/SDL_svgavideo.c @ 0:74212992fb08

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Initial revision
author Sam Lantinga <slouken@lokigames.com>
date Thu, 26 Apr 2001 16:45:43 +0000
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children cf2af46e9e2a
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-1:000000000000 0:74212992fb08
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>
35
36 #if defined(linux)
37 #include <linux/vt.h>
38 #elif defined(__FreeBSD__)
39 #include <sys/consio.h>
40 #else
41 #error You must choose your operating system here
42 #endif
43 #include <vga.h>
44 #include <vgamouse.h>
45 #include <vgakeyboard.h>
46
47 #include "SDL.h"
48 #include "SDL_error.h"
49 #include "SDL_video.h"
50 #include "SDL_mouse.h"
51 #include "SDL_sysvideo.h"
52 #include "SDL_pixels_c.h"
53 #include "SDL_events_c.h"
54 #include "SDL_svgavideo.h"
55 #include "SDL_svgaevents_c.h"
56 #include "SDL_svgamouse_c.h"
57
58
59 /* Initialization/Query functions */
60 static int SVGA_VideoInit(_THIS, SDL_PixelFormat *vformat);
61 static SDL_Rect **SVGA_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags);
62 static SDL_Surface *SVGA_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags);
63 static int SVGA_SetColors(_THIS, int firstcolor, int ncolors,
64 SDL_Color *colors);
65 static void SVGA_VideoQuit(_THIS);
66
67 /* Hardware surface functions */
68 static int SVGA_AllocHWSurface(_THIS, SDL_Surface *surface);
69 static int SVGA_LockHWSurface(_THIS, SDL_Surface *surface);
70 static int SVGA_FlipHWSurface(_THIS, SDL_Surface *surface);
71 static void SVGA_UnlockHWSurface(_THIS, SDL_Surface *surface);
72 static void SVGA_FreeHWSurface(_THIS, SDL_Surface *surface);
73
74 /* SVGAlib driver bootstrap functions */
75
76 static int SVGA_Available(void)
77 {
78 /* Check to see if we are root and stdin is a virtual console */
79 int console;
80
81 console = STDIN_FILENO;
82 if ( console >= 0 ) {
83 struct stat sb;
84 struct vt_mode dummy;
85
86 if ( (fstat(console, &sb) < 0) ||
87 (ioctl(console, VT_GETMODE, &dummy) < 0) ) {
88 console = -1;
89 }
90 }
91 return((geteuid() == 0) && (console >= 0));
92 }
93
94 static void SVGA_DeleteDevice(SDL_VideoDevice *device)
95 {
96 free(device->hidden);
97 free(device);
98 }
99
100 static SDL_VideoDevice *SVGA_CreateDevice(int devindex)
101 {
102 SDL_VideoDevice *device;
103
104 /* Initialize all variables that we clean on shutdown */
105 device = (SDL_VideoDevice *)malloc(sizeof(SDL_VideoDevice));
106 if ( device ) {
107 memset(device, 0, (sizeof *device));
108 device->hidden = (struct SDL_PrivateVideoData *)
109 malloc((sizeof *device->hidden));
110 }
111 if ( (device == NULL) || (device->hidden == NULL) ) {
112 SDL_OutOfMemory();
113 if ( device ) {
114 free(device);
115 }
116 return(0);
117 }
118 memset(device->hidden, 0, (sizeof *device->hidden));
119
120 /* Set the function pointers */
121 device->VideoInit = SVGA_VideoInit;
122 device->ListModes = SVGA_ListModes;
123 device->SetVideoMode = SVGA_SetVideoMode;
124 device->SetColors = SVGA_SetColors;
125 device->UpdateRects = NULL;
126 device->VideoQuit = SVGA_VideoQuit;
127 device->AllocHWSurface = SVGA_AllocHWSurface;
128 device->CheckHWBlit = NULL;
129 device->FillHWRect = NULL;
130 device->SetHWColorKey = NULL;
131 device->SetHWAlpha = NULL;
132 device->LockHWSurface = SVGA_LockHWSurface;
133 device->UnlockHWSurface = SVGA_UnlockHWSurface;
134 device->FlipHWSurface = NULL;
135 device->FreeHWSurface = SVGA_FreeHWSurface;
136 device->SetCaption = NULL;
137 device->SetIcon = NULL;
138 device->IconifyWindow = NULL;
139 device->GrabInput = NULL;
140 device->GetWMInfo = NULL;
141 device->InitOSKeymap = SVGA_InitOSKeymap;
142 device->PumpEvents = SVGA_PumpEvents;
143
144 device->free = SVGA_DeleteDevice;
145
146 return device;
147 }
148
149 VideoBootStrap SVGALIB_bootstrap = {
150 "svgalib", "SVGAlib",
151 SVGA_Available, SVGA_CreateDevice
152 };
153
154 static int SVGA_AddMode(_THIS, int mode, int actually_add, int force)
155 {
156 vga_modeinfo *modeinfo;
157
158 modeinfo = vga_getmodeinfo(mode);
159 if ( force || ( modeinfo->flags & CAPABLE_LINEAR ) ) {
160 int i, j;
161
162 i = modeinfo->bytesperpixel-1;
163 if ( actually_add ) {
164 SDL_Rect saved_rect[2];
165 int saved_mode[2];
166 int b;
167
168 /* Add the mode, sorted largest to smallest */
169 b = 0;
170 j = 0;
171 while ( (SDL_modelist[i][j]->w > modeinfo->width) ||
172 (SDL_modelist[i][j]->h > modeinfo->height) ) {
173 ++j;
174 }
175 /* Skip modes that are already in our list */
176 if ( (SDL_modelist[i][j]->w == modeinfo->width) &&
177 (SDL_modelist[i][j]->h == modeinfo->height) ) {
178 return(0);
179 }
180 /* Insert the new mode */
181 saved_rect[b] = *SDL_modelist[i][j];
182 saved_mode[b] = SDL_vgamode[i][j];
183 SDL_modelist[i][j]->w = modeinfo->width;
184 SDL_modelist[i][j]->h = modeinfo->height;
185 SDL_vgamode[i][j] = mode;
186 /* Everybody scoot down! */
187 if ( saved_rect[b].w && saved_rect[b].h ) {
188 for ( ++j; SDL_modelist[i][j]->w; ++j ) {
189 saved_rect[!b] = *SDL_modelist[i][j];
190 saved_mode[!b] = SDL_vgamode[i][j];
191 *SDL_modelist[i][j] = saved_rect[b];
192 SDL_vgamode[i][j] = saved_mode[b];
193 b = !b;
194 }
195 *SDL_modelist[i][j] = saved_rect[b];
196 SDL_vgamode[i][j] = saved_mode[b];
197 }
198 } else {
199 ++SDL_nummodes[i];
200 }
201 }
202 return( force || ( modeinfo->flags & CAPABLE_LINEAR ) );
203 }
204
205 static void SVGA_UpdateVideoInfo(_THIS)
206 {
207 vga_modeinfo *modeinfo;
208
209 this->info.wm_available = 0;
210 this->info.hw_available = 1;
211 modeinfo = vga_getmodeinfo(vga_getcurrentmode());
212 this->info.video_mem = (modeinfo->maxpixels/1024);
213 if ( modeinfo->bytesperpixel > 0 ) {
214 this->info.video_mem *= modeinfo->bytesperpixel;
215 }
216 /* FIXME: Add hardware accelerated blit information */
217 #if 0
218 printf("Hardware accelerated blit: %savailable\n", modeinfo->haveblit ? "" : "not ");
219 #endif
220 }
221
222 int SVGA_VideoInit(_THIS, SDL_PixelFormat *vformat)
223 {
224 int keyboard;
225 int i, j;
226 int mode, total_modes;
227
228 /* Initialize all variables that we clean on shutdown */
229 for ( i=0; i<NUM_MODELISTS; ++i ) {
230 SDL_nummodes[i] = 0;
231 SDL_modelist[i] = NULL;
232 SDL_vgamode[i] = NULL;
233 }
234
235 /* Initialize the library */
236 vga_disabledriverreport();
237 if ( vga_init() < 0 ) {
238 SDL_SetError("Unable to initialize SVGAlib");
239 return(-1);
240 }
241 vga_setmode(TEXT);
242
243 /* Enable mouse and keyboard support */
244 vga_setmousesupport(1);
245 keyboard = keyboard_init_return_fd();
246 if ( keyboard < 0 ) {
247 SDL_SetError("Unable to initialize keyboard");
248 return(-1);
249 }
250 if ( SVGA_initkeymaps(keyboard) < 0 ) {
251 return(-1);
252 }
253 keyboard_seteventhandler(SVGA_keyboardcallback);
254
255 /* Determine the screen depth (use default 8-bit depth) */
256 vformat->BitsPerPixel = 8;
257
258 /* Enumerate the available fullscreen modes */
259 total_modes = 0;
260 for ( mode=vga_lastmodenumber(); mode; --mode ) {
261 if ( vga_hasmode(mode) ) {
262 if ( SVGA_AddMode(this, mode, 0, 0) ) {
263 ++total_modes;
264 }
265 }
266 }
267 if ( SVGA_AddMode(this, G320x200x256, 0, 1) ) ++total_modes;
268 if ( total_modes == 0 ) {
269 SDL_SetError("No linear video modes available");
270 return(-1);
271 }
272 for ( i=0; i<NUM_MODELISTS; ++i ) {
273 SDL_vgamode[i] = (int *)malloc(SDL_nummodes[i]*sizeof(int));
274 if ( SDL_vgamode[i] == NULL ) {
275 SDL_OutOfMemory();
276 return(-1);
277 }
278 SDL_modelist[i] = (SDL_Rect **)
279 malloc((SDL_nummodes[i]+1)*sizeof(SDL_Rect *));
280 if ( SDL_modelist[i] == NULL ) {
281 SDL_OutOfMemory();
282 return(-1);
283 }
284 for ( j=0; j<SDL_nummodes[i]; ++j ) {
285 SDL_modelist[i][j]=(SDL_Rect *)malloc(sizeof(SDL_Rect));
286 if ( SDL_modelist[i][j] == NULL ) {
287 SDL_OutOfMemory();
288 return(-1);
289 }
290 memset(SDL_modelist[i][j], 0, sizeof(SDL_Rect));
291 }
292 SDL_modelist[i][j] = NULL;
293 }
294 for ( mode=vga_lastmodenumber(); mode; --mode ) {
295 if ( vga_hasmode(mode) ) {
296 SVGA_AddMode(this, mode, 1, 0);
297 }
298 }
299 SVGA_AddMode(this, G320x200x256, 1, 1);
300
301 /* Free extra (duplicated) modes */
302 for ( i=0; i<NUM_MODELISTS; ++i ) {
303 j = 0;
304 while ( SDL_modelist[i][j] && SDL_modelist[i][j]->w ) {
305 j++;
306 }
307 while ( SDL_modelist[i][j] ) {
308 free(SDL_modelist[i][j]);
309 SDL_modelist[i][j] = NULL;
310 j++;
311 }
312 }
313
314 /* Fill in our hardware acceleration capabilities */
315 SVGA_UpdateVideoInfo(this);
316
317 /* We're done! */
318 return(0);
319 }
320
321 SDL_Rect **SVGA_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags)
322 {
323 return(SDL_modelist[((format->BitsPerPixel+7)/8)-1]);
324 }
325
326 /* Various screen update functions available */
327 static void SVGA_DirectUpdate(_THIS, int numrects, SDL_Rect *rects);
328 static void SVGA_BankedUpdate(_THIS, int numrects, SDL_Rect *rects);
329
330 SDL_Surface *SVGA_SetVideoMode(_THIS, SDL_Surface *current,
331 int width, int height, int bpp, Uint32 flags)
332 {
333 int mode;
334 int vgamode;
335 vga_modeinfo *modeinfo;
336
337 /* Try to set the requested linear video mode */
338 bpp = (bpp+7)/8-1;
339 for ( mode=0; SDL_modelist[bpp][mode]; ++mode ) {
340 if ( (SDL_modelist[bpp][mode]->w == width) &&
341 (SDL_modelist[bpp][mode]->h == height) ) {
342 break;
343 }
344 }
345 if ( SDL_modelist[bpp][mode] == NULL ) {
346 SDL_SetError("Couldn't find requested mode in list");
347 return(NULL);
348 }
349 vga_setmode(SDL_vgamode[bpp][mode]);
350 vga_setpage(0);
351
352 vgamode=SDL_vgamode[bpp][mode];
353 if ((vga_setlinearaddressing()<0) && (vgamode!=G320x200x256)) {
354 SDL_SetError("Unable to set linear addressing");
355 return(NULL);
356 }
357 modeinfo = vga_getmodeinfo(SDL_vgamode[bpp][mode]);
358
359 /* Update hardware acceleration info */
360 SVGA_UpdateVideoInfo(this);
361
362 /* Allocate the new pixel format for the screen */
363 bpp = (bpp+1)*8;
364 if ( (bpp == 16) && (modeinfo->colors == 32768) ) {
365 bpp = 15;
366 }
367 if ( ! SDL_ReallocFormat(current, bpp, 0, 0, 0, 0) ) {
368 return(NULL);
369 }
370
371 /* Set up the new mode framebuffer */
372 current->flags = (SDL_FULLSCREEN|SDL_HWSURFACE);
373 current->w = width;
374 current->h = height;
375 current->pitch = modeinfo->linewidth;
376 current->pixels = vga_getgraphmem();
377
378 /* Set the blit function */
379 this->UpdateRects = SVGA_DirectUpdate;
380
381 /* Set up the mouse handler again (buggy SVGAlib 1.40) */
382 mouse_seteventhandler(SVGA_mousecallback);
383
384 /* We're done */
385 return(current);
386 }
387
388 /* We don't actually allow hardware surfaces other than the main one */
389 static int SVGA_AllocHWSurface(_THIS, SDL_Surface *surface)
390 {
391 return(-1);
392 }
393 static void SVGA_FreeHWSurface(_THIS, SDL_Surface *surface)
394 {
395 return;
396 }
397
398 /* We need to wait for vertical retrace on page flipped displays */
399 static int SVGA_LockHWSurface(_THIS, SDL_Surface *surface)
400 {
401 if ( (surface->flags & SDL_DOUBLEBUF) == SDL_DOUBLEBUF ) {
402 vga_waitretrace();
403 }
404 return(0);
405 }
406 static void SVGA_UnlockHWSurface(_THIS, SDL_Surface *surface)
407 {
408 return;
409 }
410
411 /* FIXME: How is this done with SVGAlib? */
412 static int SVGA_FlipHWSurface(_THIS, SDL_Surface *surface)
413 {
414 return(0);
415 }
416
417 static void SVGA_DirectUpdate(_THIS, int numrects, SDL_Rect *rects)
418 {
419 return;
420 }
421
422 /* FIXME: Can this be used under SVGAlib? */
423 static void SVGA_BankedUpdate(_THIS, int numrects, SDL_Rect *rects)
424 {
425 return;
426 }
427
428 int SVGA_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors)
429 {
430 int i;
431
432 for(i = 0; i < ncolors; i++) {
433 vga_setpalette(firstcolor + i,
434 colors[i].r>>2,
435 colors[i].g>>2,
436 colors[i].b>>2);
437 }
438 return(1);
439 }
440
441 /* Note: If we are terminated, this could be called in the middle of
442 another SDL video routine -- notably UpdateRects.
443 */
444 void SVGA_VideoQuit(_THIS)
445 {
446 int i, j;
447
448 /* Reset the console video mode */
449 if ( this->screen && (this->screen->w && this->screen->h) ) {
450 vga_setmode(TEXT);
451 }
452 keyboard_close();
453
454 /* Free video mode lists */
455 for ( i=0; i<NUM_MODELISTS; ++i ) {
456 if ( SDL_modelist[i] != NULL ) {
457 for ( j=0; SDL_modelist[i][j]; ++j )
458 free(SDL_modelist[i][j]);
459 free(SDL_modelist[i]);
460 SDL_modelist[i] = NULL;
461 }
462 if ( SDL_vgamode[i] != NULL ) {
463 free(SDL_vgamode[i]);
464 SDL_vgamode[i] = NULL;
465 }
466 }
467 if ( this->screen && (this->screen->flags & SDL_HWSURFACE) ) {
468 /* Direct screen access, no memory buffer */
469 this->screen->pixels = NULL;
470 }
471 }