e14743d1 |
1 | /* |
2 | SDL - Simple DirectMedia Layer |
3 | Copyright (C) 1997-2009 Sam Lantinga |
4 | |
5 | This library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either |
8 | version 2.1 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 | Lesser General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with this library; if not, write to the Free Software |
17 | Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
18 | |
19 | Sam Lantinga |
20 | slouken@libsdl.org |
21 | */ |
22 | #include "SDL_config.h" |
23 | |
24 | /* DGA 2.0 based SDL video driver implementation. |
25 | */ |
26 | |
27 | #include <stdio.h> |
28 | |
29 | #include <X11/Xlib.h> |
30 | #include "../Xext/extensions/xf86dga.h" |
31 | |
32 | #include "SDL_video.h" |
33 | #include "SDL_mouse.h" |
34 | #include "../SDL_sysvideo.h" |
35 | #include "../SDL_pixels_c.h" |
36 | #include "../../events/SDL_events_c.h" |
37 | #include "SDL_dgavideo.h" |
38 | #include "SDL_dgamouse_c.h" |
39 | #include "SDL_dgaevents_c.h" |
40 | |
41 | /* get function pointers... */ |
42 | #include "../x11/SDL_x11dyn.h" |
43 | |
44 | /*#define DGA_DEBUG*/ |
45 | |
46 | /* Initialization/Query functions */ |
47 | static int DGA_VideoInit(_THIS, SDL_PixelFormat *vformat); |
48 | static SDL_Rect **DGA_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags); |
49 | static SDL_Surface *DGA_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags); |
50 | static int DGA_SetColors(_THIS, int firstcolor, int ncolors, |
51 | SDL_Color *colors); |
52 | static int DGA_SetGammaRamp(_THIS, Uint16 *ramp); |
53 | static void DGA_VideoQuit(_THIS); |
54 | |
55 | /* Hardware surface functions */ |
56 | static int DGA_InitHWSurfaces(_THIS, SDL_Surface *screen, Uint8 *base, int size); |
57 | static void DGA_FreeHWSurfaces(_THIS); |
58 | static int DGA_AllocHWSurface(_THIS, SDL_Surface *surface); |
59 | static int DGA_FillHWRect(_THIS, SDL_Surface *dst, SDL_Rect *rect, Uint32 color); |
60 | static int DGA_CheckHWBlit(_THIS, SDL_Surface *src, SDL_Surface *dst); |
61 | static int DGA_LockHWSurface(_THIS, SDL_Surface *surface); |
62 | static void DGA_UnlockHWSurface(_THIS, SDL_Surface *surface); |
63 | static void DGA_FreeHWSurface(_THIS, SDL_Surface *surface); |
64 | static int DGA_FlipHWSurface(_THIS, SDL_Surface *surface); |
65 | |
66 | /* DGA driver bootstrap functions */ |
67 | |
68 | static int DGA_Available(void) |
69 | { |
70 | const char *display = NULL; |
71 | Display *dpy = NULL; |
72 | int available = 0; |
73 | |
74 | /* The driver is available is available if the display is local |
75 | and the DGA 2.0+ extension is available, and we can map mem. |
76 | */ |
77 | if ( SDL_X11_LoadSymbols() ) { |
78 | if ( (SDL_strncmp(XDisplayName(display), ":", 1) == 0) || |
79 | (SDL_strncmp(XDisplayName(display), "unix:", 5) == 0) ) { |
80 | dpy = XOpenDisplay(display); |
81 | if ( dpy ) { |
82 | int events, errors, major, minor; |
83 | |
84 | if ( SDL_NAME(XDGAQueryExtension)(dpy, &events, &errors) && |
85 | SDL_NAME(XDGAQueryVersion)(dpy, &major, &minor) ) { |
86 | int screen; |
87 | |
88 | screen = DefaultScreen(dpy); |
89 | if ( (major >= 2) && |
90 | SDL_NAME(XDGAOpenFramebuffer)(dpy, screen) ) { |
91 | available = 1; |
92 | SDL_NAME(XDGACloseFramebuffer)(dpy, screen); |
93 | } |
94 | } |
95 | XCloseDisplay(dpy); |
96 | } |
97 | } |
98 | SDL_X11_UnloadSymbols(); |
99 | } |
100 | return(available); |
101 | } |
102 | |
103 | static void DGA_DeleteDevice(SDL_VideoDevice *device) |
104 | { |
105 | if (device != NULL) { |
106 | SDL_free(device->hidden); |
107 | SDL_free(device); |
108 | SDL_X11_UnloadSymbols(); |
109 | } |
110 | } |
111 | |
112 | static SDL_VideoDevice *DGA_CreateDevice(int devindex) |
113 | { |
114 | SDL_VideoDevice *device = NULL; |
115 | |
116 | /* Initialize all variables that we clean on shutdown */ |
117 | if (SDL_X11_LoadSymbols()) { |
118 | device = (SDL_VideoDevice *)SDL_malloc(sizeof(SDL_VideoDevice)); |
119 | if ( device ) { |
120 | SDL_memset(device, 0, (sizeof *device)); |
121 | device->hidden = (struct SDL_PrivateVideoData *) |
122 | SDL_malloc((sizeof *device->hidden)); |
123 | } |
124 | if ( (device == NULL) || (device->hidden == NULL) ) { |
125 | SDL_OutOfMemory(); |
126 | if ( device ) { |
127 | SDL_free(device); |
128 | } |
129 | SDL_X11_UnloadSymbols(); |
130 | return(0); |
131 | } |
132 | SDL_memset(device->hidden, 0, (sizeof *device->hidden)); |
133 | |
134 | /* Set the function pointers */ |
135 | device->VideoInit = DGA_VideoInit; |
136 | device->ListModes = DGA_ListModes; |
137 | device->SetVideoMode = DGA_SetVideoMode; |
138 | device->SetColors = DGA_SetColors; |
139 | device->UpdateRects = NULL; |
140 | device->VideoQuit = DGA_VideoQuit; |
141 | device->AllocHWSurface = DGA_AllocHWSurface; |
142 | device->CheckHWBlit = DGA_CheckHWBlit; |
143 | device->FillHWRect = DGA_FillHWRect; |
144 | device->SetHWColorKey = NULL; |
145 | device->SetHWAlpha = NULL; |
146 | device->LockHWSurface = DGA_LockHWSurface; |
147 | device->UnlockHWSurface = DGA_UnlockHWSurface; |
148 | device->FlipHWSurface = DGA_FlipHWSurface; |
149 | device->FreeHWSurface = DGA_FreeHWSurface; |
150 | device->SetGammaRamp = DGA_SetGammaRamp; |
151 | device->GetGammaRamp = NULL; |
152 | device->SetCaption = NULL; |
153 | device->SetIcon = NULL; |
154 | device->IconifyWindow = NULL; |
155 | device->GrabInput = NULL; |
156 | device->GetWMInfo = NULL; |
157 | device->InitOSKeymap = DGA_InitOSKeymap; |
158 | device->PumpEvents = DGA_PumpEvents; |
159 | |
160 | device->free = DGA_DeleteDevice; |
161 | } |
162 | |
163 | return device; |
164 | } |
165 | |
166 | VideoBootStrap DGA_bootstrap = { |
167 | "dga", "XFree86 DGA 2.0", |
168 | DGA_Available, DGA_CreateDevice |
169 | }; |
170 | |
171 | static int DGA_AddMode(_THIS, int bpp, int w, int h) |
172 | { |
173 | SDL_Rect *mode; |
174 | int index; |
175 | int next_mode; |
176 | |
177 | /* Check to see if we already have this mode */ |
178 | if ( bpp < 8 ) { /* Not supported */ |
179 | return(0); |
180 | } |
181 | index = ((bpp+7)/8)-1; |
182 | if ( SDL_nummodes[index] > 0 ) { |
183 | mode = SDL_modelist[index][SDL_nummodes[index]-1]; |
184 | if ( (mode->w == w) && (mode->h == h) ) { |
185 | return(0); |
186 | } |
187 | } |
188 | |
189 | /* Set up the new video mode rectangle */ |
190 | mode = (SDL_Rect *)SDL_malloc(sizeof *mode); |
191 | if ( mode == NULL ) { |
192 | SDL_OutOfMemory(); |
193 | return(-1); |
194 | } |
195 | mode->x = 0; |
196 | mode->y = 0; |
197 | mode->w = w; |
198 | mode->h = h; |
199 | |
200 | /* Allocate the new list of modes, and fill in the new mode */ |
201 | next_mode = SDL_nummodes[index]; |
202 | SDL_modelist[index] = (SDL_Rect **) |
203 | SDL_realloc(SDL_modelist[index], (1+next_mode+1)*sizeof(SDL_Rect *)); |
204 | if ( SDL_modelist[index] == NULL ) { |
205 | SDL_OutOfMemory(); |
206 | SDL_nummodes[index] = 0; |
207 | SDL_free(mode); |
208 | return(-1); |
209 | } |
210 | SDL_modelist[index][next_mode] = mode; |
211 | SDL_modelist[index][next_mode+1] = NULL; |
212 | SDL_nummodes[index]++; |
213 | |
214 | return(0); |
215 | } |
216 | |
217 | /* This whole function is a hack. :) */ |
218 | static Uint32 get_video_size(_THIS) |
219 | { |
220 | /* This is a non-exported function from libXxf86dga.a */ |
221 | extern unsigned char *SDL_NAME(XDGAGetMappedMemory)(int screen); |
222 | FILE *proc; |
223 | unsigned long mem; |
224 | unsigned start, stop; |
225 | char line[BUFSIZ]; |
226 | Uint32 size; |
227 | |
228 | mem = (unsigned long)SDL_NAME(XDGAGetMappedMemory)(DGA_Screen); |
229 | size = 0; |
230 | proc = fopen("/proc/self/maps", "r"); |
231 | if ( proc ) { |
232 | while ( fgets(line, sizeof(line)-1, proc) ) { |
233 | SDL_sscanf(line, "%x-%x", &start, &stop); |
234 | if ( start == mem ) { |
235 | size = (Uint32)((stop-start)/1024); |
236 | break; |
237 | } |
238 | } |
239 | fclose(proc); |
240 | } |
241 | return(size); |
242 | } |
243 | |
244 | #ifdef DGA_DEBUG |
245 | static void PrintMode(SDL_NAME(XDGAMode) *mode) |
246 | { |
247 | printf("Mode: %s (%dx%d) at %d bpp (%f refresh, %d pitch) num: %d\n", |
248 | mode->name, |
249 | mode->viewportWidth, mode->viewportHeight, |
250 | mode->depth == 24 ? mode->bitsPerPixel : mode->depth, |
251 | mode->verticalRefresh, mode->bytesPerScanline, mode->num); |
252 | printf("\tRGB: 0x%8.8x 0x%8.8x 0x%8.8x (%d - %s)\n", |
253 | mode->redMask, mode->greenMask, mode->blueMask, |
254 | mode->visualClass, |
255 | mode->visualClass == TrueColor ? "truecolor" : |
256 | mode->visualClass == DirectColor ? "directcolor" : |
257 | mode->visualClass == PseudoColor ? "pseudocolor" : "unknown"); |
258 | printf("\tFlags: "); |
259 | if ( mode->flags & XDGAConcurrentAccess ) |
260 | printf(" XDGAConcurrentAccess"); |
261 | if ( mode->flags & XDGASolidFillRect ) |
262 | printf(" XDGASolidFillRect"); |
263 | if ( mode->flags & XDGABlitRect ) |
264 | printf(" XDGABlitRect"); |
265 | if ( mode->flags & XDGABlitTransRect ) |
266 | printf(" XDGABlitTransRect"); |
267 | if ( mode->flags & XDGAPixmap ) |
268 | printf(" XDGAPixmap"); |
269 | if ( mode->flags & XDGAInterlaced ) |
270 | printf(" XDGAInterlaced"); |
271 | if ( mode->flags & XDGADoublescan ) |
272 | printf(" XDGADoublescan"); |
273 | if ( mode->viewportFlags & XDGAFlipRetrace ) |
274 | printf(" XDGAFlipRetrace"); |
275 | if ( mode->viewportFlags & XDGAFlipImmediate ) |
276 | printf(" XDGAFlipImmediate"); |
277 | printf("\n"); |
278 | } |
279 | #endif /* DGA_DEBUG */ |
280 | |
281 | static int cmpmodes(const void *va, const void *vb) |
282 | { |
283 | const SDL_NAME(XDGAMode) *a = (const SDL_NAME(XDGAMode) *)va; |
284 | const SDL_NAME(XDGAMode) *b = (const SDL_NAME(XDGAMode) *)vb; |
285 | |
286 | if ( (a->viewportWidth == b->viewportWidth) && |
287 | (b->viewportHeight == a->viewportHeight) ) { |
288 | /* Prefer 32 bpp over 24 bpp, 16 bpp over 15 bpp */ |
289 | int a_bpp = a->depth == 24 ? a->bitsPerPixel : a->depth; |
290 | int b_bpp = b->depth == 24 ? b->bitsPerPixel : b->depth; |
291 | if ( a_bpp != b_bpp ) { |
292 | return b_bpp - a_bpp; |
293 | } |
294 | /* Prefer DirectColor visuals, for gamma support */ |
295 | if ( a->visualClass == DirectColor && b->visualClass != DirectColor ) |
296 | return -1; |
297 | if ( b->visualClass == DirectColor && a->visualClass != DirectColor ) |
298 | return 1; |
299 | /* Maintain server refresh rate sorting */ |
300 | return a->num - b->num; |
301 | } else if ( a->viewportWidth == b->viewportWidth ) { |
302 | return b->viewportHeight - a->viewportHeight; |
303 | } else { |
304 | return b->viewportWidth - a->viewportWidth; |
305 | } |
306 | } |
307 | static void UpdateHWInfo(_THIS, SDL_NAME(XDGAMode) *mode) |
308 | { |
309 | this->info.wm_available = 0; |
310 | this->info.hw_available = 1; |
311 | if ( mode->flags & XDGABlitRect ) { |
312 | this->info.blit_hw = 1; |
313 | } else { |
314 | this->info.blit_hw = 0; |
315 | } |
316 | if ( mode->flags & XDGABlitTransRect ) { |
317 | this->info.blit_hw_CC = 1; |
318 | } else { |
319 | this->info.blit_hw_CC = 0; |
320 | } |
321 | if ( mode->flags & XDGASolidFillRect ) { |
322 | this->info.blit_fill = 1; |
323 | } else { |
324 | this->info.blit_fill = 0; |
325 | } |
326 | this->info.video_mem = get_video_size(this); |
327 | } |
328 | |
329 | static int DGA_VideoInit(_THIS, SDL_PixelFormat *vformat) |
330 | { |
331 | const char *env; |
332 | const char *display; |
333 | int event_base, error_base; |
334 | int major_version, minor_version; |
335 | Visual *visual; |
336 | SDL_NAME(XDGAMode) *modes; |
337 | int i, num_modes; |
338 | |
339 | /* Open the X11 display */ |
340 | display = NULL; /* Get it from DISPLAY environment variable */ |
341 | |
342 | DGA_Display = XOpenDisplay(display); |
343 | if ( DGA_Display == NULL ) { |
344 | SDL_SetError("Couldn't open X11 display"); |
345 | return(-1); |
346 | } |
347 | |
348 | /* Check for the DGA extension */ |
349 | if ( ! SDL_NAME(XDGAQueryExtension)(DGA_Display, &event_base, &error_base) || |
350 | ! SDL_NAME(XDGAQueryVersion)(DGA_Display, &major_version, &minor_version) ) { |
351 | SDL_SetError("DGA extension not available"); |
352 | XCloseDisplay(DGA_Display); |
353 | return(-1); |
354 | } |
355 | if ( major_version < 2 ) { |
356 | SDL_SetError("DGA driver requires DGA 2.0 or newer"); |
357 | XCloseDisplay(DGA_Display); |
358 | return(-1); |
359 | } |
360 | DGA_event_base = event_base; |
361 | |
362 | /* Determine the current screen size */ |
363 | this->info.current_w = DisplayWidth(DGA_Display, DGA_Screen); |
364 | this->info.current_h = DisplayHeight(DGA_Display, DGA_Screen); |
365 | |
366 | /* Determine the current screen depth */ |
367 | visual = DefaultVisual(DGA_Display, DGA_Screen); |
368 | { |
369 | XPixmapFormatValues *pix_format; |
370 | int i, num_formats; |
371 | |
372 | vformat->BitsPerPixel = DefaultDepth(DGA_Display, DGA_Screen); |
373 | pix_format = XListPixmapFormats(DGA_Display, &num_formats); |
374 | if ( pix_format == NULL ) { |
375 | SDL_SetError("Couldn't determine screen formats"); |
376 | XCloseDisplay(DGA_Display); |
377 | return(-1); |
378 | } |
379 | for ( i=0; i<num_formats; ++i ) { |
380 | if ( vformat->BitsPerPixel == pix_format[i].depth ) |
381 | break; |
382 | } |
383 | if ( i != num_formats ) |
384 | vformat->BitsPerPixel = pix_format[i].bits_per_pixel; |
385 | XFree((char *)pix_format); |
386 | } |
387 | if ( vformat->BitsPerPixel > 8 ) { |
388 | vformat->Rmask = visual->red_mask; |
389 | vformat->Gmask = visual->green_mask; |
390 | vformat->Bmask = visual->blue_mask; |
391 | } |
392 | |
393 | /* Open access to the framebuffer */ |
394 | if ( ! SDL_NAME(XDGAOpenFramebuffer)(DGA_Display, DGA_Screen) ) { |
395 | SDL_SetError("Unable to map the video memory"); |
396 | XCloseDisplay(DGA_Display); |
397 | return(-1); |
398 | } |
399 | |
400 | /* Allow environment override of screensaver disable. */ |
401 | env = SDL_getenv("SDL_VIDEO_ALLOW_SCREENSAVER"); |
402 | if ( env ) { |
403 | allow_screensaver = SDL_atoi(env); |
404 | } else { |
405 | #ifdef SDL_VIDEO_DISABLE_SCREENSAVER |
406 | allow_screensaver = 0; |
407 | #else |
408 | allow_screensaver = 1; |
409 | #endif |
410 | } |
411 | |
412 | /* Query for the list of available video modes */ |
413 | modes = SDL_NAME(XDGAQueryModes)(DGA_Display, DGA_Screen, &num_modes); |
414 | SDL_qsort(modes, num_modes, sizeof *modes, cmpmodes); |
415 | for ( i=0; i<num_modes; ++i ) { |
416 | if ( ((modes[i].visualClass == PseudoColor) || |
417 | (modes[i].visualClass == DirectColor) || |
418 | (modes[i].visualClass == TrueColor)) && |
419 | !(modes[i].flags & (XDGAInterlaced|XDGADoublescan)) ) { |
420 | #ifdef DGA_DEBUG |
421 | PrintMode(&modes[i]); |
422 | #endif |
423 | DGA_AddMode(this, modes[i].bitsPerPixel, |
424 | modes[i].viewportWidth, |
425 | modes[i].viewportHeight); |
426 | } |
427 | } |
428 | UpdateHWInfo(this, modes); |
429 | XFree(modes); |
430 | |
431 | /* Create the hardware surface lock mutex */ |
432 | hw_lock = SDL_CreateMutex(); |
433 | if ( hw_lock == NULL ) { |
434 | SDL_SetError("Unable to create lock mutex"); |
435 | DGA_VideoQuit(this); |
436 | return(-1); |
437 | } |
438 | |
439 | #ifdef LOCK_DGA_DISPLAY |
440 | /* Create the event lock so we're thread-safe.. :-/ */ |
441 | event_lock = SDL_CreateMutex(); |
442 | #endif /* LOCK_DGA_DISPLAY */ |
443 | |
444 | /* We're done! */ |
445 | return(0); |
446 | } |
447 | |
448 | SDL_Rect **DGA_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags) |
449 | { |
450 | return(SDL_modelist[((format->BitsPerPixel+7)/8)-1]); |
451 | } |
452 | |
453 | /* Various screen update functions available */ |
454 | static void DGA_DirectUpdate(_THIS, int numrects, SDL_Rect *rects); |
455 | |
456 | SDL_Surface *DGA_SetVideoMode(_THIS, SDL_Surface *current, |
457 | int width, int height, int bpp, Uint32 flags) |
458 | { |
459 | SDL_NAME(XDGAMode) *modes; |
460 | int i, num_modes; |
461 | SDL_NAME(XDGADevice) *mode; |
462 | int screen_len; |
463 | Uint8 *surfaces_mem; |
464 | int surfaces_len; |
465 | |
466 | /* Free any previous colormap */ |
467 | if ( DGA_colormap ) { |
468 | XFreeColormap(DGA_Display, DGA_colormap); |
469 | DGA_colormap = 0; |
470 | } |
471 | |
472 | /* Search for a matching video mode */ |
473 | modes = SDL_NAME(XDGAQueryModes)(DGA_Display, DGA_Screen, &num_modes); |
474 | SDL_qsort(modes, num_modes, sizeof *modes, cmpmodes); |
475 | for ( i=0; i<num_modes; ++i ) { |
476 | int depth; |
477 | |
478 | depth = modes[i].depth; |
479 | if ( depth == 24 ) { /* Distinguish between 24 and 32 bpp */ |
480 | depth = modes[i].bitsPerPixel; |
481 | } |
482 | if ( (depth == bpp) && |
483 | (modes[i].viewportWidth == width) && |
484 | (modes[i].viewportHeight == height) && |
485 | ((modes[i].visualClass == PseudoColor) || |
486 | (modes[i].visualClass == DirectColor) || |
487 | (modes[i].visualClass == TrueColor)) && |
488 | !(modes[i].flags & (XDGAInterlaced|XDGADoublescan)) ) { |
489 | break; |
490 | } |
491 | } |
492 | if ( i == num_modes ) { |
493 | SDL_SetError("No matching video mode found"); |
494 | return(NULL); |
495 | } |
496 | #ifdef DGA_DEBUG |
497 | PrintMode(&modes[i]); |
498 | #endif |
499 | |
500 | /* Set the video mode */ |
501 | mode = SDL_NAME(XDGASetMode)(DGA_Display, DGA_Screen, modes[i].num); |
502 | XFree(modes); |
503 | if ( mode == NULL ) { |
504 | SDL_SetError("Unable to switch to requested mode"); |
505 | return(NULL); |
506 | } |
507 | DGA_visualClass = mode->mode.visualClass; |
508 | memory_base = (Uint8 *)mode->data; |
509 | memory_pitch = mode->mode.bytesPerScanline; |
510 | |
511 | /* Set up the new mode framebuffer */ |
512 | current->flags = (SDL_FULLSCREEN|SDL_HWSURFACE); |
513 | current->w = mode->mode.viewportWidth; |
514 | current->h = mode->mode.viewportHeight; |
515 | current->pitch = memory_pitch; |
516 | current->pixels = memory_base; |
517 | if ( ! SDL_ReallocFormat(current, mode->mode.bitsPerPixel, |
518 | mode->mode.redMask, |
519 | mode->mode.greenMask, |
520 | mode->mode.blueMask, 0) ) { |
521 | return(NULL); |
522 | } |
523 | screen_len = current->h*current->pitch; |
524 | |
525 | /* Create a colormap if necessary */ |
526 | if ( (DGA_visualClass == PseudoColor) || |
527 | (DGA_visualClass == DirectColor) ) { |
528 | DGA_colormap = SDL_NAME(XDGACreateColormap)(DGA_Display, DGA_Screen, |
529 | mode, AllocAll); |
530 | if ( DGA_visualClass == PseudoColor ) { |
531 | current->flags |= SDL_HWPALETTE; |
532 | } else { |
533 | /* Initialize the colormap to the identity mapping */ |
534 | SDL_GetGammaRamp(0, 0, 0); |
535 | this->screen = current; |
536 | DGA_SetGammaRamp(this, this->gamma); |
537 | this->screen = NULL; |
538 | } |
539 | } else { |
540 | DGA_colormap = SDL_NAME(XDGACreateColormap)(DGA_Display, DGA_Screen, |
541 | mode, AllocNone); |
542 | } |
543 | SDL_NAME(XDGAInstallColormap)(DGA_Display, DGA_Screen, DGA_colormap); |
544 | |
545 | /* Update the hardware capabilities */ |
546 | UpdateHWInfo(this, &mode->mode); |
547 | |
548 | /* Set up the information for hardware surfaces */ |
549 | surfaces_mem = (Uint8 *)current->pixels + screen_len; |
550 | surfaces_len = (mode->mode.imageHeight*current->pitch - screen_len); |
551 | |
552 | /* Update for double-buffering, if we can */ |
553 | SDL_NAME(XDGASetViewport)(DGA_Display, DGA_Screen, 0, 0, XDGAFlipRetrace); |
554 | if ( flags & SDL_DOUBLEBUF ) { |
555 | if ( mode->mode.imageHeight >= (current->h*2) ) { |
556 | current->flags |= SDL_DOUBLEBUF; |
557 | flip_page = 0; |
558 | flip_yoffset[0] = 0; |
559 | flip_yoffset[1] = current->h; |
560 | flip_address[0] = memory_base; |
561 | flip_address[1] = memory_base+screen_len; |
562 | surfaces_mem += screen_len; |
563 | surfaces_len -= screen_len; |
564 | } |
565 | } |
566 | |
567 | /* Allocate memory tracking for hardware surfaces */ |
568 | DGA_FreeHWSurfaces(this); |
569 | if ( surfaces_len < 0 ) { |
570 | surfaces_len = 0; |
571 | } |
572 | DGA_InitHWSurfaces(this, current, surfaces_mem, surfaces_len); |
573 | |
574 | /* Expose the back buffer as surface memory */ |
575 | if ( current->flags & SDL_DOUBLEBUF ) { |
576 | this->screen = current; |
577 | DGA_FlipHWSurface(this, current); |
578 | this->screen = NULL; |
579 | } |
580 | |
581 | /* Set the update rectangle function */ |
582 | this->UpdateRects = DGA_DirectUpdate; |
583 | |
584 | /* Enable mouse and keyboard support */ |
585 | { long input_mask; |
586 | input_mask = (KeyPressMask | KeyReleaseMask); |
587 | input_mask |= (ButtonPressMask | ButtonReleaseMask); |
588 | input_mask |= PointerMotionMask; |
589 | SDL_NAME(XDGASelectInput)(DGA_Display, DGA_Screen, input_mask); |
590 | } |
591 | |
592 | /* We're done */ |
593 | return(current); |
594 | } |
595 | |
596 | #ifdef DGA_DEBUG |
597 | static void DGA_DumpHWSurfaces(_THIS) |
598 | { |
599 | vidmem_bucket *bucket; |
600 | |
601 | printf("Memory left: %d (%d total)\n", surfaces_memleft, surfaces_memtotal); |
602 | printf("\n"); |
603 | printf(" Base Size\n"); |
604 | for ( bucket=&surfaces; bucket; bucket=bucket->next ) { |
605 | printf("Bucket: %p, %d (%s)\n", bucket->base, bucket->size, bucket->used ? "used" : "free"); |
606 | if ( bucket->prev ) { |
607 | if ( bucket->base != bucket->prev->base+bucket->prev->size ) { |
608 | printf("Warning, corrupt bucket list! (prev)\n"); |
609 | } |
610 | } else { |
611 | if ( bucket != &surfaces ) { |
612 | printf("Warning, corrupt bucket list! (!prev)\n"); |
613 | } |
614 | } |
615 | if ( bucket->next ) { |
616 | if ( bucket->next->base != bucket->base+bucket->size ) { |
617 | printf("Warning, corrupt bucket list! (next)\n"); |
618 | } |
619 | } |
620 | } |
621 | printf("\n"); |
622 | } |
623 | #endif |
624 | |
625 | static int DGA_InitHWSurfaces(_THIS, SDL_Surface *screen, Uint8 *base, int size) |
626 | { |
627 | vidmem_bucket *bucket; |
628 | |
629 | surfaces_memtotal = size; |
630 | surfaces_memleft = size; |
631 | |
632 | if ( surfaces_memleft > 0 ) { |
633 | bucket = (vidmem_bucket *)SDL_malloc(sizeof(*bucket)); |
634 | if ( bucket == NULL ) { |
635 | SDL_OutOfMemory(); |
636 | return(-1); |
637 | } |
638 | bucket->prev = &surfaces; |
639 | bucket->used = 0; |
640 | bucket->dirty = 0; |
641 | bucket->base = base; |
642 | bucket->size = size; |
643 | bucket->next = NULL; |
644 | } else { |
645 | bucket = NULL; |
646 | } |
647 | |
648 | surfaces.prev = NULL; |
649 | surfaces.used = 1; |
650 | surfaces.dirty = 0; |
651 | surfaces.base = screen->pixels; |
652 | surfaces.size = (unsigned int)((long)base - (long)surfaces.base); |
653 | surfaces.next = bucket; |
654 | screen->hwdata = (struct private_hwdata *)&surfaces; |
655 | return(0); |
656 | } |
657 | static void DGA_FreeHWSurfaces(_THIS) |
658 | { |
659 | vidmem_bucket *bucket, *freeable; |
660 | |
661 | bucket = surfaces.next; |
662 | while ( bucket ) { |
663 | freeable = bucket; |
664 | bucket = bucket->next; |
665 | SDL_free(freeable); |
666 | } |
667 | surfaces.next = NULL; |
668 | } |
669 | |
670 | static __inline__ void DGA_AddBusySurface(SDL_Surface *surface) |
671 | { |
672 | ((vidmem_bucket *)surface->hwdata)->dirty = 1; |
673 | } |
674 | |
675 | static __inline__ int DGA_IsSurfaceBusy(SDL_Surface *surface) |
676 | { |
677 | return ((vidmem_bucket *)surface->hwdata)->dirty; |
678 | } |
679 | |
680 | static __inline__ void DGA_WaitBusySurfaces(_THIS) |
681 | { |
682 | vidmem_bucket *bucket; |
683 | |
684 | /* Wait for graphic operations to complete */ |
685 | SDL_NAME(XDGASync)(DGA_Display, DGA_Screen); |
686 | |
687 | /* Clear all surface dirty bits */ |
688 | for ( bucket=&surfaces; bucket; bucket=bucket->next ) { |
689 | bucket->dirty = 0; |
690 | } |
691 | } |
692 | |
693 | static int DGA_AllocHWSurface(_THIS, SDL_Surface *surface) |
694 | { |
695 | vidmem_bucket *bucket; |
696 | int size; |
697 | int extra; |
698 | int retval = 0; |
699 | |
700 | /* Temporarily, we only allow surfaces the same width as display. |
701 | Some blitters require the pitch between two hardware surfaces |
702 | to be the same. Others have interesting alignment restrictions. |
703 | */ |
704 | if ( surface->pitch > SDL_VideoSurface->pitch ) { |
705 | SDL_SetError("Surface requested wider than screen"); |
706 | return(-1); |
707 | } |
708 | surface->pitch = SDL_VideoSurface->pitch; |
709 | size = surface->h * surface->pitch; |
710 | #ifdef DGA_DEBUG |
711 | fprintf(stderr, "Allocating bucket of %d bytes\n", size); |
712 | #endif |
713 | LOCK_DISPLAY(); |
714 | |
715 | /* Quick check for available mem */ |
716 | if ( size > surfaces_memleft ) { |
717 | SDL_SetError("Not enough video memory"); |
718 | retval = -1; |
719 | goto done; |
720 | } |
721 | |
722 | /* Search for an empty bucket big enough */ |
723 | for ( bucket=&surfaces; bucket; bucket=bucket->next ) { |
724 | if ( ! bucket->used && (size <= bucket->size) ) { |
725 | break; |
726 | } |
727 | } |
728 | if ( bucket == NULL ) { |
729 | SDL_SetError("Video memory too fragmented"); |
730 | retval = -1; |
731 | goto done; |
732 | } |
733 | |
734 | /* Create a new bucket for left-over memory */ |
735 | extra = (bucket->size - size); |
736 | if ( extra ) { |
737 | vidmem_bucket *newbucket; |
738 | |
739 | #ifdef DGA_DEBUG |
740 | fprintf(stderr, "Adding new free bucket of %d bytes\n", extra); |
741 | #endif |
742 | newbucket = (vidmem_bucket *)SDL_malloc(sizeof(*newbucket)); |
743 | if ( newbucket == NULL ) { |
744 | SDL_OutOfMemory(); |
745 | retval = -1; |
746 | goto done; |
747 | } |
748 | newbucket->prev = bucket; |
749 | newbucket->used = 0; |
750 | newbucket->base = bucket->base+size; |
751 | newbucket->size = extra; |
752 | newbucket->next = bucket->next; |
753 | if ( bucket->next ) { |
754 | bucket->next->prev = newbucket; |
755 | } |
756 | bucket->next = newbucket; |
757 | } |
758 | |
759 | /* Set the current bucket values and return it! */ |
760 | bucket->used = 1; |
761 | bucket->size = size; |
762 | bucket->dirty = 0; |
763 | #ifdef DGA_DEBUG |
764 | fprintf(stderr, "Allocated %d bytes at %p\n", bucket->size, bucket->base); |
765 | #endif |
766 | surfaces_memleft -= size; |
767 | surface->flags |= SDL_HWSURFACE; |
768 | surface->pixels = bucket->base; |
769 | surface->hwdata = (struct private_hwdata *)bucket; |
770 | done: |
771 | UNLOCK_DISPLAY(); |
772 | return(retval); |
773 | } |
774 | static void DGA_FreeHWSurface(_THIS, SDL_Surface *surface) |
775 | { |
776 | vidmem_bucket *bucket, *freeable; |
777 | |
778 | /* Wait for any pending operations involving this surface */ |
779 | if ( DGA_IsSurfaceBusy(surface) ) { |
780 | LOCK_DISPLAY(); |
781 | DGA_WaitBusySurfaces(this); |
782 | UNLOCK_DISPLAY(); |
783 | } |
784 | |
785 | /* Look for the bucket in the current list */ |
786 | for ( bucket=&surfaces; bucket; bucket=bucket->next ) { |
787 | if ( bucket == (vidmem_bucket *)surface->hwdata ) { |
788 | break; |
789 | } |
790 | } |
791 | if ( bucket && bucket->used ) { |
792 | /* Add the memory back to the total */ |
793 | #ifdef DGA_DEBUG |
794 | printf("Freeing bucket of %d bytes\n", bucket->size); |
795 | #endif |
796 | surfaces_memleft += bucket->size; |
797 | |
798 | /* Can we merge the space with surrounding buckets? */ |
799 | bucket->used = 0; |
800 | if ( bucket->next && ! bucket->next->used ) { |
801 | #ifdef DGA_DEBUG |
802 | printf("Merging with next bucket, for %d total bytes\n", bucket->size+bucket->next->size); |
803 | #endif |
804 | freeable = bucket->next; |
805 | bucket->size += bucket->next->size; |
806 | bucket->next = bucket->next->next; |
807 | if ( bucket->next ) { |
808 | bucket->next->prev = bucket; |
809 | } |
810 | SDL_free(freeable); |
811 | } |
812 | if ( bucket->prev && ! bucket->prev->used ) { |
813 | #ifdef DGA_DEBUG |
814 | printf("Merging with previous bucket, for %d total bytes\n", bucket->prev->size+bucket->size); |
815 | #endif |
816 | freeable = bucket; |
817 | bucket->prev->size += bucket->size; |
818 | bucket->prev->next = bucket->next; |
819 | if ( bucket->next ) { |
820 | bucket->next->prev = bucket->prev; |
821 | } |
822 | SDL_free(freeable); |
823 | } |
824 | } |
825 | surface->pixels = NULL; |
826 | surface->hwdata = NULL; |
827 | } |
828 | |
829 | static __inline__ void DGA_dst_to_xy(_THIS, SDL_Surface *dst, int *x, int *y) |
830 | { |
831 | *x = (long)((Uint8 *)dst->pixels - memory_base)%memory_pitch; |
832 | *y = (long)((Uint8 *)dst->pixels - memory_base)/memory_pitch; |
833 | } |
834 | |
835 | static int DGA_FillHWRect(_THIS, SDL_Surface *dst, SDL_Rect *rect, Uint32 color) |
836 | { |
837 | int x, y; |
838 | unsigned int w, h; |
839 | |
840 | /* Don't fill the visible part of the screen, wait until flipped */ |
841 | LOCK_DISPLAY(); |
842 | if ( was_flipped && (dst == this->screen) ) { |
843 | while ( SDL_NAME(XDGAGetViewportStatus)(DGA_Display, DGA_Screen) ) |
844 | /* Keep waiting for the hardware ... */ ; |
845 | was_flipped = 0; |
846 | } |
847 | DGA_dst_to_xy(this, dst, &x, &y); |
848 | x += rect->x; |
849 | y += rect->y; |
850 | w = rect->w; |
851 | h = rect->h; |
852 | #if 0 |
853 | printf("Hardware accelerated rectangle fill: %dx%d at %d,%d\n", w, h, x, y); |
854 | #endif |
855 | SDL_NAME(XDGAFillRectangle)(DGA_Display, DGA_Screen, x, y, w, h, color); |
856 | if ( !(this->screen->flags & SDL_DOUBLEBUF) ) { |
857 | XFlush(DGA_Display); |
858 | } |
859 | DGA_AddBusySurface(dst); |
860 | UNLOCK_DISPLAY(); |
861 | return(0); |
862 | } |
863 | |
864 | static int HWAccelBlit(SDL_Surface *src, SDL_Rect *srcrect, |
865 | SDL_Surface *dst, SDL_Rect *dstrect) |
866 | { |
867 | SDL_VideoDevice *this; |
868 | int srcx, srcy; |
869 | int dstx, dsty; |
870 | unsigned int w, h; |
871 | |
872 | this = current_video; |
873 | /* Don't blit to the visible part of the screen, wait until flipped */ |
874 | LOCK_DISPLAY(); |
875 | if ( was_flipped && (dst == this->screen) ) { |
876 | while ( SDL_NAME(XDGAGetViewportStatus)(DGA_Display, DGA_Screen) ) |
877 | /* Keep waiting for the hardware ... */ ; |
878 | was_flipped = 0; |
879 | } |
880 | DGA_dst_to_xy(this, src, &srcx, &srcy); |
881 | srcx += srcrect->x; |
882 | srcy += srcrect->y; |
883 | DGA_dst_to_xy(this, dst, &dstx, &dsty); |
884 | dstx += dstrect->x; |
885 | dsty += dstrect->y; |
886 | w = srcrect->w; |
887 | h = srcrect->h; |
888 | #if 0 |
889 | printf("Blitting %dx%d from %d,%d to %d,%d\n", w, h, srcx, srcy, dstx, dsty); |
890 | #endif |
891 | if ( (src->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) { |
892 | SDL_NAME(XDGACopyTransparentArea)(DGA_Display, DGA_Screen, |
893 | srcx, srcy, w, h, dstx, dsty, src->format->colorkey); |
894 | } else { |
895 | SDL_NAME(XDGACopyArea)(DGA_Display, DGA_Screen, |
896 | srcx, srcy, w, h, dstx, dsty); |
897 | } |
898 | if ( !(this->screen->flags & SDL_DOUBLEBUF) ) { |
899 | XFlush(DGA_Display); |
900 | } |
901 | DGA_AddBusySurface(src); |
902 | DGA_AddBusySurface(dst); |
903 | UNLOCK_DISPLAY(); |
904 | return(0); |
905 | } |
906 | |
907 | static int DGA_CheckHWBlit(_THIS, SDL_Surface *src, SDL_Surface *dst) |
908 | { |
909 | int accelerated; |
910 | |
911 | /* Set initial acceleration on */ |
912 | src->flags |= SDL_HWACCEL; |
913 | |
914 | /* Set the surface attributes */ |
915 | if ( (src->flags & SDL_SRCALPHA) == SDL_SRCALPHA ) { |
916 | if ( ! this->info.blit_hw_A ) { |
917 | src->flags &= ~SDL_HWACCEL; |
918 | } |
919 | } |
920 | if ( (src->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) { |
921 | if ( ! this->info.blit_hw_CC ) { |
922 | src->flags &= ~SDL_HWACCEL; |
923 | } |
924 | } |
925 | |
926 | /* Check to see if final surface blit is accelerated */ |
927 | accelerated = !!(src->flags & SDL_HWACCEL); |
928 | if ( accelerated ) { |
929 | src->map->hw_blit = HWAccelBlit; |
930 | } |
931 | return(accelerated); |
932 | } |
933 | |
934 | static __inline__ void DGA_WaitFlip(_THIS) |
935 | { |
936 | if ( was_flipped ) { |
937 | while ( SDL_NAME(XDGAGetViewportStatus)(DGA_Display, DGA_Screen) ) |
938 | /* Keep waiting for the hardware ... */ ; |
939 | was_flipped = 0; |
940 | } |
941 | } |
942 | |
943 | static int DGA_LockHWSurface(_THIS, SDL_Surface *surface) |
944 | { |
945 | if ( surface == this->screen ) { |
946 | SDL_mutexP(hw_lock); |
947 | LOCK_DISPLAY(); |
948 | if ( DGA_IsSurfaceBusy(surface) ) { |
949 | DGA_WaitBusySurfaces(this); |
950 | } |
951 | DGA_WaitFlip(this); |
952 | UNLOCK_DISPLAY(); |
953 | } else { |
954 | if ( DGA_IsSurfaceBusy(surface) ) { |
955 | LOCK_DISPLAY(); |
956 | DGA_WaitBusySurfaces(this); |
957 | UNLOCK_DISPLAY(); |
958 | } |
959 | } |
960 | return(0); |
961 | } |
962 | static void DGA_UnlockHWSurface(_THIS, SDL_Surface *surface) |
963 | { |
964 | if ( surface == this->screen ) { |
965 | SDL_mutexV(hw_lock); |
966 | } |
967 | } |
968 | |
969 | static int DGA_FlipHWSurface(_THIS, SDL_Surface *surface) |
970 | { |
971 | /* Wait for vertical retrace and then flip display */ |
972 | LOCK_DISPLAY(); |
973 | if ( DGA_IsSurfaceBusy(this->screen) ) { |
974 | DGA_WaitBusySurfaces(this); |
975 | } |
976 | DGA_WaitFlip(this); |
977 | SDL_NAME(XDGASetViewport)(DGA_Display, DGA_Screen, |
978 | 0, flip_yoffset[flip_page], XDGAFlipRetrace); |
979 | XFlush(DGA_Display); |
980 | UNLOCK_DISPLAY(); |
981 | was_flipped = 1; |
982 | flip_page = !flip_page; |
983 | |
984 | surface->pixels = flip_address[flip_page]; |
985 | return(0); |
986 | } |
987 | |
988 | static void DGA_DirectUpdate(_THIS, int numrects, SDL_Rect *rects) |
989 | { |
990 | /* The application is already updating the visible video memory */ |
991 | return; |
992 | } |
993 | |
994 | static int DGA_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors) |
995 | { |
996 | int i; |
997 | XColor *xcmap; |
998 | |
999 | /* This happens on initialization */ |
1000 | if ( ! DGA_colormap ) { |
1001 | return(0); |
1002 | } |
1003 | xcmap = SDL_stack_alloc(XColor, ncolors); |
1004 | for ( i=0; i<ncolors; ++i ) { |
1005 | xcmap[i].pixel = firstcolor + i; |
1006 | xcmap[i].red = (colors[i].r<<8)|colors[i].r; |
1007 | xcmap[i].green = (colors[i].g<<8)|colors[i].g; |
1008 | xcmap[i].blue = (colors[i].b<<8)|colors[i].b; |
1009 | xcmap[i].flags = (DoRed|DoGreen|DoBlue); |
1010 | } |
1011 | LOCK_DISPLAY(); |
1012 | XStoreColors(DGA_Display, DGA_colormap, xcmap, ncolors); |
1013 | XSync(DGA_Display, False); |
1014 | UNLOCK_DISPLAY(); |
1015 | SDL_stack_free(xcmap); |
1016 | |
1017 | /* That was easy. :) */ |
1018 | return(1); |
1019 | } |
1020 | |
1021 | int DGA_SetGammaRamp(_THIS, Uint16 *ramp) |
1022 | { |
1023 | int i, ncolors; |
1024 | XColor xcmap[256]; |
1025 | |
1026 | /* See if actually setting the gamma is supported */ |
1027 | if ( DGA_visualClass != DirectColor ) { |
1028 | SDL_SetError("Gamma correction not supported on this visual"); |
1029 | return(-1); |
1030 | } |
1031 | |
1032 | /* Calculate the appropriate palette for the given gamma ramp */ |
1033 | if ( this->screen->format->BitsPerPixel <= 16 ) { |
1034 | ncolors = 64; /* Is this right? */ |
1035 | } else { |
1036 | ncolors = 256; |
1037 | } |
1038 | for ( i=0; i<ncolors; ++i ) { |
1039 | Uint8 c = (256 * i / ncolors); |
1040 | xcmap[i].pixel = SDL_MapRGB(this->screen->format, c, c, c); |
1041 | xcmap[i].red = ramp[0*256+c]; |
1042 | xcmap[i].green = ramp[1*256+c]; |
1043 | xcmap[i].blue = ramp[2*256+c]; |
1044 | xcmap[i].flags = (DoRed|DoGreen|DoBlue); |
1045 | } |
1046 | LOCK_DISPLAY(); |
1047 | XStoreColors(DGA_Display, DGA_colormap, xcmap, ncolors); |
1048 | XSync(DGA_Display, False); |
1049 | UNLOCK_DISPLAY(); |
1050 | return(0); |
1051 | } |
1052 | |
1053 | void DGA_VideoQuit(_THIS) |
1054 | { |
1055 | int i, j; |
1056 | |
1057 | if ( DGA_Display ) { |
1058 | /* Free colormap, if necessary */ |
1059 | if ( DGA_colormap ) { |
1060 | XFreeColormap(DGA_Display, DGA_colormap); |
1061 | DGA_colormap = 0; |
1062 | } |
1063 | |
1064 | /* Unmap memory and reset video mode */ |
1065 | SDL_NAME(XDGACloseFramebuffer)(DGA_Display, DGA_Screen); |
1066 | if ( this->screen ) { |
1067 | /* Tell SDL not to free the pixels */ |
1068 | DGA_FreeHWSurface(this, this->screen); |
1069 | } |
1070 | SDL_NAME(XDGASetMode)(DGA_Display, DGA_Screen, 0); |
1071 | |
1072 | /* Clear the lock mutex */ |
1073 | if ( hw_lock != NULL ) { |
1074 | SDL_DestroyMutex(hw_lock); |
1075 | hw_lock = NULL; |
1076 | } |
1077 | #ifdef LOCK_DGA_DISPLAY |
1078 | if ( event_lock != NULL ) { |
1079 | SDL_DestroyMutex(event_lock); |
1080 | event_lock = NULL; |
1081 | } |
1082 | #endif /* LOCK_DGA_DISPLAY */ |
1083 | |
1084 | /* Clean up defined video modes */ |
1085 | for ( i=0; i<NUM_MODELISTS; ++i ) { |
1086 | if ( SDL_modelist[i] != NULL ) { |
1087 | for ( j=0; SDL_modelist[i][j]; ++j ) { |
1088 | SDL_free(SDL_modelist[i][j]); |
1089 | } |
1090 | SDL_free(SDL_modelist[i]); |
1091 | SDL_modelist[i] = NULL; |
1092 | } |
1093 | } |
1094 | |
1095 | /* Clean up the memory bucket list */ |
1096 | DGA_FreeHWSurfaces(this); |
1097 | |
1098 | /* Close up the display */ |
1099 | XCloseDisplay(DGA_Display); |
1100 | } |
1101 | } |