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comparison src/video/dga/SDL_dgavideo.c @ 0:74212992fb08

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Initial revision
author Sam Lantinga <slouken@lokigames.com>
date Thu, 26 Apr 2001 16:45:43 +0000
parents
children e85e03f195b4
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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 /* DGA 2.0 based SDL video driver implementation.
29 */
30
31 #include <stdlib.h>
32 #include <string.h>
33 #include <X11/Xlib.h>
34 #include <X11/extensions/xf86dga.h>
35
36 #ifdef HAVE_ALLOCA_H
37 #include <alloca.h>
38 #endif
39
40 #include "SDL.h"
41 #include "SDL_error.h"
42 #include "SDL_video.h"
43 #include "SDL_mouse.h"
44 #include "SDL_sysvideo.h"
45 #include "SDL_pixels_c.h"
46 #include "SDL_events_c.h"
47 #include "SDL_dgavideo.h"
48 #include "SDL_dgamouse_c.h"
49 #include "SDL_dgaevents_c.h"
50
51 /* Initialization/Query functions */
52 static int DGA_VideoInit(_THIS, SDL_PixelFormat *vformat);
53 static SDL_Rect **DGA_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags);
54 static SDL_Surface *DGA_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags);
55 static int DGA_SetColors(_THIS, int firstcolor, int ncolors,
56 SDL_Color *colors);
57 static int DGA_SetGammaRamp(_THIS, Uint16 *ramp);
58 static void DGA_VideoQuit(_THIS);
59
60 /* Hardware surface functions */
61 static int DGA_InitHWSurfaces(_THIS, Uint8 *base, int size);
62 static void DGA_FreeHWSurfaces(_THIS);
63 static int DGA_AllocHWSurface(_THIS, SDL_Surface *surface);
64 static int DGA_FillHWRect(_THIS, SDL_Surface *dst, SDL_Rect *rect, Uint32 color);
65 static int DGA_CheckHWBlit(_THIS, SDL_Surface *src, SDL_Surface *dst);
66 static int DGA_LockHWSurface(_THIS, SDL_Surface *surface);
67 static void DGA_UnlockHWSurface(_THIS, SDL_Surface *surface);
68 static void DGA_FreeHWSurface(_THIS, SDL_Surface *surface);
69 static int DGA_FlipHWSurface(_THIS, SDL_Surface *surface);
70
71 /* DGA driver bootstrap functions */
72
73 static int DGA_Available(void)
74 {
75 const char *display;
76 Display *dpy;
77 int available;
78
79 /* The driver is available is available if the display is local
80 and the DGA 2.0+ extension is available, and we can map mem.
81 */
82 available = 0;
83 display = NULL;
84 if ( (strncmp(XDisplayName(display), ":", 1) == 0) ||
85 (strncmp(XDisplayName(display), "unix:", 5) == 0) ) {
86 dpy = XOpenDisplay(display);
87 if ( dpy ) {
88 int events, errors, major, minor;
89
90 if ( XDGAQueryExtension(dpy, &events, &errors) &&
91 XDGAQueryVersion(dpy, &major, &minor) ) {
92 int screen;
93
94 screen = DefaultScreen(dpy);
95 if ( (major >= 2) &&
96 XDGAOpenFramebuffer(dpy, screen) ) {
97 available = 1;
98 XDGACloseFramebuffer(dpy, screen);
99 }
100 }
101 XCloseDisplay(dpy);
102 }
103 }
104 return(available);
105 }
106
107 static void DGA_DeleteDevice(SDL_VideoDevice *device)
108 {
109 free(device->hidden);
110 free(device);
111 }
112
113 static SDL_VideoDevice *DGA_CreateDevice(int devindex)
114 {
115 SDL_VideoDevice *device;
116
117 /* Initialize all variables that we clean on shutdown */
118 device = (SDL_VideoDevice *)malloc(sizeof(SDL_VideoDevice));
119 if ( device ) {
120 memset(device, 0, (sizeof *device));
121 device->hidden = (struct SDL_PrivateVideoData *)
122 malloc((sizeof *device->hidden));
123 }
124 if ( (device == NULL) || (device->hidden == NULL) ) {
125 SDL_OutOfMemory();
126 if ( device ) {
127 free(device);
128 }
129 return(0);
130 }
131 memset(device->hidden, 0, (sizeof *device->hidden));
132
133 /* Set the function pointers */
134 device->VideoInit = DGA_VideoInit;
135 device->ListModes = DGA_ListModes;
136 device->SetVideoMode = DGA_SetVideoMode;
137 device->SetColors = DGA_SetColors;
138 device->UpdateRects = NULL;
139 device->VideoQuit = DGA_VideoQuit;
140 device->AllocHWSurface = DGA_AllocHWSurface;
141 device->CheckHWBlit = DGA_CheckHWBlit;
142 device->FillHWRect = DGA_FillHWRect;
143 device->SetHWColorKey = NULL;
144 device->SetHWAlpha = NULL;
145 device->LockHWSurface = DGA_LockHWSurface;
146 device->UnlockHWSurface = DGA_UnlockHWSurface;
147 device->FlipHWSurface = DGA_FlipHWSurface;
148 device->FreeHWSurface = DGA_FreeHWSurface;
149 device->SetGammaRamp = DGA_SetGammaRamp;
150 device->GetGammaRamp = NULL;
151 device->SetCaption = NULL;
152 device->SetIcon = NULL;
153 device->IconifyWindow = NULL;
154 device->GrabInput = NULL;
155 device->GetWMInfo = NULL;
156 device->InitOSKeymap = DGA_InitOSKeymap;
157 device->PumpEvents = DGA_PumpEvents;
158
159 device->free = DGA_DeleteDevice;
160
161 return device;
162 }
163
164 VideoBootStrap DGA_bootstrap = {
165 "dga", "XFree86 DGA 2.0",
166 DGA_Available, DGA_CreateDevice
167 };
168
169 static int DGA_AddMode(_THIS, int bpp, int w, int h)
170 {
171 SDL_Rect *mode;
172 int i, index;
173 int next_mode;
174
175 /* Check to see if we already have this mode */
176 if ( bpp < 8 ) { /* Not supported */
177 return(0);
178 }
179 index = ((bpp+7)/8)-1;
180 for ( i=0; i<SDL_nummodes[index]; ++i ) {
181 mode = SDL_modelist[index][i];
182 if ( (mode->w == w) && (mode->h == h) ) {
183 return(0);
184 }
185 }
186
187 /* Set up the new video mode rectangle */
188 mode = (SDL_Rect *)malloc(sizeof *mode);
189 if ( mode == NULL ) {
190 SDL_OutOfMemory();
191 return(-1);
192 }
193 mode->x = 0;
194 mode->y = 0;
195 mode->w = w;
196 mode->h = h;
197
198 /* Allocate the new list of modes, and fill in the new mode */
199 next_mode = SDL_nummodes[index];
200 SDL_modelist[index] = (SDL_Rect **)
201 realloc(SDL_modelist[index], (1+next_mode+1)*sizeof(SDL_Rect *));
202 if ( SDL_modelist[index] == NULL ) {
203 SDL_OutOfMemory();
204 SDL_nummodes[index] = 0;
205 free(mode);
206 return(-1);
207 }
208 SDL_modelist[index][next_mode] = mode;
209 SDL_modelist[index][next_mode+1] = NULL;
210 SDL_nummodes[index]++;
211
212 return(0);
213 }
214
215 /* This whole function is a hack. :) */
216 static Uint32 get_video_size(_THIS)
217 {
218 /* This is a non-exported function from libXxf86dga.a */
219 extern unsigned char *XDGAGetMappedMemory(int screen);
220 FILE *proc;
221 unsigned long mem;
222 unsigned start, stop;
223 char line[BUFSIZ];
224 Uint32 size;
225
226 mem = (unsigned long)XDGAGetMappedMemory(DGA_Screen);
227 size = 0;
228 proc = fopen("/proc/self/maps", "r");
229 if ( proc ) {
230 while ( fgets(line, sizeof(line)-1, proc) ) {
231 sscanf(line, "%x-%x", &start, &stop);
232 if ( start == mem ) {
233 size = (Uint32)((stop-start)/1024);
234 break;
235 }
236 }
237 fclose(proc);
238 }
239 return(size);
240 }
241
242 #ifdef DGA_DEBUG
243 static void PrintMode(XDGAMode *mode)
244 {
245 printf("Mode: %s (%dx%d) at %d bpp (%f refresh, %d pitch) num: %d\n",
246 mode->name,
247 mode->viewportWidth, mode->viewportHeight,
248 mode->depth == 24 ? mode->bitsPerPixel : mode->depth,
249 mode->verticalRefresh, mode->bytesPerScanline, mode->num);
250 printf("\tRGB: 0x%8.8x 0x%8.8x 0x%8.8x (%d - %s)\n",
251 mode->redMask, mode->greenMask, mode->blueMask,
252 mode->visualClass,
253 mode->visualClass == TrueColor ? "truecolor" :
254 mode->visualClass == DirectColor ? "directcolor" :
255 mode->visualClass == PseudoColor ? "pseudocolor" : "unknown");
256 printf("\tFlags: ");
257 if ( mode->flags & XDGAConcurrentAccess )
258 printf(" XDGAConcurrentAccess");
259 if ( mode->flags & XDGASolidFillRect )
260 printf(" XDGASolidFillRect");
261 if ( mode->flags & XDGABlitRect )
262 printf(" XDGABlitRect");
263 if ( mode->flags & XDGABlitTransRect )
264 printf(" XDGABlitTransRect");
265 if ( mode->flags & XDGAPixmap )
266 printf(" XDGAPixmap");
267 if ( mode->flags & XDGAInterlaced )
268 printf(" XDGAInterlaced");
269 if ( mode->flags & XDGADoublescan )
270 printf(" XDGADoublescan");
271 if ( mode->viewportFlags & XDGAFlipRetrace )
272 printf(" XDGAFlipRetrace");
273 if ( mode->viewportFlags & XDGAFlipImmediate )
274 printf(" XDGAFlipImmediate");
275 printf("\n");
276 }
277 #endif /* DGA_DEBUG */
278
279 static int cmpmodes(const void *va, const void *vb)
280 {
281 XDGAMode *a = (XDGAMode *)va;
282 XDGAMode *b = (XDGAMode *)vb;
283
284 /* Prefer DirectColor visuals for otherwise equal modes */
285 if ( (a->viewportWidth == b->viewportWidth) &&
286 (b->viewportHeight == a->viewportHeight) ) {
287 if ( a->visualClass == DirectColor )
288 return -1;
289 if ( b->visualClass == DirectColor )
290 return 1;
291 return 0;
292 } else {
293 if(a->viewportWidth > b->viewportWidth)
294 return -1;
295 return b->viewportHeight - a->viewportHeight;
296 }
297 }
298 static void UpdateHWInfo(_THIS, XDGAMode *mode)
299 {
300 this->info.wm_available = 0;
301 this->info.hw_available = 1;
302 if ( mode->flags & XDGABlitRect ) {
303 this->info.blit_hw = 1;
304 } else {
305 this->info.blit_hw = 0;
306 }
307 if ( mode->flags & XDGABlitTransRect ) {
308 this->info.blit_hw_CC = 1;
309 } else {
310 this->info.blit_hw_CC = 0;
311 }
312 if ( mode->flags & XDGASolidFillRect ) {
313 this->info.blit_fill = 1;
314 } else {
315 this->info.blit_fill = 0;
316 }
317 this->info.video_mem = get_video_size(this);
318 }
319
320 static int DGA_VideoInit(_THIS, SDL_PixelFormat *vformat)
321 {
322 const char *display;
323 int event_base, error_base;
324 int major_version, minor_version;
325 Visual *visual;
326 XDGAMode *modes;
327 int i, num_modes;
328
329 /* Open the X11 display */
330 display = NULL; /* Get it from DISPLAY environment variable */
331
332 DGA_Display = XOpenDisplay(display);
333 if ( DGA_Display == NULL ) {
334 SDL_SetError("Couldn't open X11 display");
335 return(-1);
336 }
337
338 /* Check for the DGA extension */
339 if ( ! XDGAQueryExtension(DGA_Display, &event_base, &error_base) ||
340 ! XDGAQueryVersion(DGA_Display, &major_version, &minor_version) ) {
341 SDL_SetError("DGA extension not available");
342 XCloseDisplay(DGA_Display);
343 return(-1);
344 }
345 if ( major_version < 2 ) {
346 SDL_SetError("DGA driver requires DGA 2.0 or newer");
347 XCloseDisplay(DGA_Display);
348 return(-1);
349 }
350 DGA_event_base = event_base;
351
352 /* Determine the current screen depth */
353 visual = DefaultVisual(DGA_Display, DGA_Screen);
354 {
355 XPixmapFormatValues *pix_format;
356 int i, num_formats;
357
358 vformat->BitsPerPixel = DefaultDepth(DGA_Display, DGA_Screen);
359 pix_format = XListPixmapFormats(DGA_Display, &num_formats);
360 if ( pix_format == NULL ) {
361 SDL_SetError("Couldn't determine screen formats");
362 XCloseDisplay(DGA_Display);
363 return(-1);
364 }
365 for ( i=0; i<num_formats; ++i ) {
366 if ( vformat->BitsPerPixel == pix_format[i].depth )
367 break;
368 }
369 if ( i != num_formats )
370 vformat->BitsPerPixel = pix_format[i].bits_per_pixel;
371 XFree((char *)pix_format);
372 }
373 if ( vformat->BitsPerPixel > 8 ) {
374 vformat->Rmask = visual->red_mask;
375 vformat->Gmask = visual->green_mask;
376 vformat->Bmask = visual->blue_mask;
377 }
378
379 /* Open access to the framebuffer */
380 if ( ! XDGAOpenFramebuffer(DGA_Display, DGA_Screen) ) {
381 SDL_SetError("Unable to map the video memory");
382 XCloseDisplay(DGA_Display);
383 return(-1);
384 }
385
386 /* Query for the list of available video modes */
387 modes = XDGAQueryModes(DGA_Display, DGA_Screen, &num_modes);
388 qsort(modes, num_modes, sizeof *modes, cmpmodes);
389 for ( i=0; i<num_modes; ++i ) {
390 #ifdef DGA_DEBUG
391 PrintMode(&modes[i]);
392 #endif
393 if ( (modes[i].visualClass == PseudoColor) ||
394 (modes[i].visualClass == DirectColor) ||
395 (modes[i].visualClass == TrueColor) ) {
396 DGA_AddMode(this, modes[i].bitsPerPixel,
397 modes[i].viewportWidth,
398 modes[i].viewportHeight);
399 }
400 }
401 UpdateHWInfo(this, modes);
402 XFree(modes);
403
404 /* Create the hardware surface lock mutex */
405 hw_lock = SDL_CreateMutex();
406 if ( hw_lock == NULL ) {
407 SDL_SetError("Unable to create lock mutex");
408 DGA_VideoQuit(this);
409 return(-1);
410 }
411
412 /* We're done! */
413 return(0);
414 }
415
416 SDL_Rect **DGA_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags)
417 {
418 return(SDL_modelist[((format->BitsPerPixel+7)/8)-1]);
419 }
420
421 /* Various screen update functions available */
422 static void DGA_DirectUpdate(_THIS, int numrects, SDL_Rect *rects);
423
424 SDL_Surface *DGA_SetVideoMode(_THIS, SDL_Surface *current,
425 int width, int height, int bpp, Uint32 flags)
426 {
427 XDGAMode *modes;
428 int i, num_modes;
429 XDGADevice *mode;
430 int screen_len;
431 Uint8 *surfaces_mem;
432 int surfaces_len;
433
434 /* Free any previous colormap */
435 if ( DGA_colormap ) {
436 XFreeColormap(DGA_Display, DGA_colormap);
437 DGA_colormap = 0;
438 }
439
440 /* Search for a matching video mode */
441 modes = XDGAQueryModes(DGA_Display, DGA_Screen, &num_modes);
442 qsort(modes, num_modes, sizeof *modes, cmpmodes);
443 for ( i=0; i<num_modes; ++i ) {
444 int depth;
445
446
447 depth = modes[i].depth;
448 if ( depth == 24 ) { /* Distinguish between 24 and 32 bpp */
449 depth = modes[i].bitsPerPixel;
450 }
451 if ( (depth == bpp) &&
452 (modes[i].viewportWidth == width) &&
453 (modes[i].viewportHeight == height) &&
454 ((modes[i].visualClass == PseudoColor) ||
455 (modes[i].visualClass == DirectColor) ||
456 (modes[i].visualClass == TrueColor)) ) {
457 break;
458 }
459 }
460 if ( i == num_modes ) {
461 SDL_SetError("No matching video mode found");
462 return(NULL);
463 }
464
465 /* Set the video mode */
466 mode = XDGASetMode(DGA_Display, DGA_Screen, modes[i].num);
467 XFree(modes);
468 if ( mode == NULL ) {
469 SDL_SetError("Unable to switch to requested mode");
470 return(NULL);
471 }
472 DGA_visualClass = modes[i].visualClass;
473 memory_base = (Uint8 *)mode->data;
474 memory_pitch = mode->mode.bytesPerScanline;
475
476 /* Set up the new mode framebuffer */
477 current->flags = (SDL_FULLSCREEN|SDL_HWSURFACE);
478 current->w = mode->mode.viewportWidth;
479 current->h = mode->mode.viewportHeight;
480 current->pitch = memory_pitch;
481 current->pixels = memory_base;
482 if ( ! SDL_ReallocFormat(current, mode->mode.bitsPerPixel,
483 mode->mode.redMask,
484 mode->mode.greenMask,
485 mode->mode.blueMask, 0) ) {
486 return(NULL);
487 }
488 screen_len = current->h*current->pitch;
489
490 /* Create a colormap if necessary */
491 if ( (DGA_visualClass == PseudoColor) ||
492 (DGA_visualClass == DirectColor) ) {
493 DGA_colormap = XDGACreateColormap(DGA_Display, DGA_Screen,
494 mode, AllocAll);
495 if ( DGA_visualClass == PseudoColor ) {
496 current->flags |= SDL_HWPALETTE;
497 } else {
498 /* Initialize the colormap to the identity mapping */
499 SDL_GetGammaRamp(0, 0, 0);
500 this->screen = current;
501 DGA_SetGammaRamp(this, this->gamma);
502 this->screen = NULL;
503 }
504 } else {
505 DGA_colormap = XDGACreateColormap(DGA_Display, DGA_Screen,
506 mode, AllocNone);
507 }
508 XDGAInstallColormap(DGA_Display, DGA_Screen, DGA_colormap);
509
510 /* Update the hardware capabilities */
511 UpdateHWInfo(this, &mode->mode);
512
513 /* Set up the information for hardware surfaces */
514 surfaces_mem = (Uint8 *)current->pixels + screen_len;
515 surfaces_len = (mode->mode.imageHeight*current->pitch - screen_len);
516
517 /* Update for double-buffering, if we can */
518 XDGASetViewport(DGA_Display, DGA_Screen, 0, 0, XDGAFlipRetrace);
519 if ( flags & SDL_DOUBLEBUF ) {
520 if ( mode->mode.imageHeight >= (current->h*2) ) {
521 current->flags |= SDL_DOUBLEBUF;
522 flip_page = 0;
523 flip_yoffset[0] = 0;
524 flip_yoffset[1] = current->h;
525 flip_address[0] = memory_base;
526 flip_address[1] = memory_base+screen_len;
527 surfaces_mem += screen_len;
528 surfaces_len -= screen_len;
529 DGA_FlipHWSurface(this, current);
530 }
531 }
532
533 /* Allocate memory tracking for hardware surfaces */
534 DGA_FreeHWSurfaces(this);
535 if ( surfaces_len < 0 ) {
536 surfaces_len = 0;
537 }
538 DGA_InitHWSurfaces(this, surfaces_mem, surfaces_len);
539
540 /* Set the update rectangle function */
541 this->UpdateRects = DGA_DirectUpdate;
542
543 /* Enable mouse and keyboard support */
544 { long input_mask;
545 input_mask = (KeyPressMask | KeyReleaseMask);
546 input_mask |= (ButtonPressMask | ButtonReleaseMask);
547 input_mask |= PointerMotionMask;
548 XDGASelectInput(DGA_Display, DGA_Screen, input_mask);
549 }
550
551 /* We're done */
552 return(current);
553 }
554
555 #ifdef DGA_DEBUG
556 static void DGA_DumpHWSurfaces(_THIS)
557 {
558 vidmem_bucket *bucket;
559
560 printf("Memory left: %d (%d total)\n", surfaces_memleft, surfaces_memtotal);
561 printf("\n");
562 printf(" Base Size\n");
563 for ( bucket=&surfaces; bucket; bucket=bucket->next ) {
564 printf("Bucket: %p, %d (%s)\n", bucket->base, bucket->size, bucket->used ? "used" : "free");
565 if ( bucket->prev ) {
566 if ( bucket->base != bucket->prev->base+bucket->prev->size ) {
567 printf("Warning, corrupt bucket list! (prev)\n");
568 }
569 } else {
570 if ( bucket != &surfaces ) {
571 printf("Warning, corrupt bucket list! (!prev)\n");
572 }
573 }
574 if ( bucket->next ) {
575 if ( bucket->next->base != bucket->base+bucket->size ) {
576 printf("Warning, corrupt bucket list! (next)\n");
577 }
578 }
579 }
580 printf("\n");
581 }
582 #endif
583
584 static int DGA_InitHWSurfaces(_THIS, Uint8 *base, int size)
585 {
586 surfaces.prev = NULL;
587 surfaces.used = 0;
588 surfaces.base = base;
589 surfaces.size = size;
590 surfaces.next = NULL;
591 surfaces_memtotal = size;
592 surfaces_memleft = size;
593 return(0);
594 }
595 static void DGA_FreeHWSurfaces(_THIS)
596 {
597 vidmem_bucket *bucket, *freeable;
598
599 bucket = surfaces.next;
600 while ( bucket ) {
601 freeable = bucket;
602 bucket = bucket->next;
603 free(freeable);
604 }
605 surfaces.next = NULL;
606 }
607
608 static int DGA_AllocHWSurface(_THIS, SDL_Surface *surface)
609 {
610 vidmem_bucket *bucket;
611 int size;
612 int extra;
613
614 /* Temporarily, we only allow surfaces the same width as display.
615 Some blitters require the pitch between two hardware surfaces
616 to be the same. Others have interesting alignment restrictions.
617 */
618 if ( surface->pitch > SDL_VideoSurface->pitch ) {
619 SDL_SetError("Surface requested wider than screen");
620 return(-1);
621 }
622 surface->pitch = SDL_VideoSurface->pitch;
623 size = surface->h * surface->pitch;
624 #ifdef DGA_DEBUG
625 fprintf(stderr, "Allocating bucket of %d bytes\n", size);
626 #endif
627
628 /* Quick check for available mem */
629 if ( size > surfaces_memleft ) {
630 SDL_SetError("Not enough video memory");
631 return(-1);
632 }
633
634 /* Search for an empty bucket big enough */
635 for ( bucket=&surfaces; bucket; bucket=bucket->next ) {
636 if ( ! bucket->used && (size <= bucket->size) ) {
637 break;
638 }
639 }
640 if ( bucket == NULL ) {
641 SDL_SetError("Video memory too fragmented");
642 return(-1);
643 }
644
645 /* Create a new bucket for left-over memory */
646 extra = (bucket->size - size);
647 if ( extra ) {
648 vidmem_bucket *newbucket;
649
650 #ifdef DGA_DEBUG
651 fprintf(stderr, "Adding new free bucket of %d bytes\n", extra);
652 #endif
653 newbucket = (vidmem_bucket *)malloc(sizeof(*newbucket));
654 if ( newbucket == NULL ) {
655 SDL_OutOfMemory();
656 return(-1);
657 }
658 newbucket->prev = bucket;
659 newbucket->used = 0;
660 newbucket->base = bucket->base+size;
661 newbucket->size = extra;
662 newbucket->next = bucket->next;
663 if ( bucket->next ) {
664 bucket->next->prev = newbucket;
665 }
666 bucket->next = newbucket;
667 }
668
669 /* Set the current bucket values and return it! */
670 bucket->used = 1;
671 bucket->size = size;
672 #ifdef DGA_DEBUG
673 fprintf(stderr, "Allocated %d bytes at %p\n", bucket->size, bucket->base);
674 #endif
675 surfaces_memleft -= size;
676 surface->flags |= SDL_HWSURFACE;
677 surface->pixels = bucket->base;
678 return(0);
679 }
680 static void DGA_FreeHWSurface(_THIS, SDL_Surface *surface)
681 {
682 vidmem_bucket *bucket, *freeable;
683
684 /* Look for the bucket in the current list */
685 for ( bucket=&surfaces; bucket; bucket=bucket->next ) {
686 if ( bucket->base == (Uint8 *)surface->pixels ) {
687 break;
688 }
689 }
690 if ( (bucket == NULL) || ! bucket->used ) {
691 return;
692 }
693
694 /* Add the memory back to the total */
695 #ifdef DGA_DEBUG
696 printf("Freeing bucket of %d bytes\n", bucket->size);
697 #endif
698 surfaces_memleft += bucket->size;
699
700 /* Can we merge the space with surrounding buckets? */
701 bucket->used = 0;
702 if ( bucket->next && ! bucket->next->used ) {
703 #ifdef DGA_DEBUG
704 printf("Merging with next bucket, for %d total bytes\n", bucket->size+bucket->next->size);
705 #endif
706 freeable = bucket->next;
707 bucket->size += bucket->next->size;
708 bucket->next = bucket->next->next;
709 if ( bucket->next ) {
710 bucket->next->prev = bucket;
711 }
712 free(freeable);
713 }
714 if ( bucket->prev && ! bucket->prev->used ) {
715 #ifdef DGA_DEBUG
716 printf("Merging with previous bucket, for %d total bytes\n", bucket->prev->size+bucket->size);
717 #endif
718 freeable = bucket;
719 bucket->prev->size += bucket->size;
720 bucket->prev->next = bucket->next;
721 if ( bucket->next ) {
722 bucket->next->prev = bucket->prev;
723 }
724 free(freeable);
725 }
726 surface->pixels = NULL;
727 }
728
729 static __inline__ void dst_to_xy(_THIS, SDL_Surface *dst, int *x, int *y)
730 {
731 *x = (long)((Uint8 *)dst->pixels - memory_base)%memory_pitch;
732 *y = (long)((Uint8 *)dst->pixels - memory_base)/memory_pitch;
733 if ( dst == this->screen ) {
734 *x += this->offset_x;
735 *y += this->offset_y;
736 }
737 }
738
739 static int DGA_FillHWRect(_THIS, SDL_Surface *dst, SDL_Rect *rect, Uint32 color)
740 {
741 int x, y;
742 unsigned int w, h;
743
744 /* Don't fill the visible part of the screen, wait until flipped */
745 if ( was_flipped && (dst == this->screen) ) {
746 while ( XDGAGetViewportStatus(DGA_Display, DGA_Screen) )
747 /* Keep waiting for the hardware ... */ ;
748 was_flipped = 0;
749 }
750 dst_to_xy(this, dst, &x, &y);
751 x += rect->x;
752 y += rect->y;
753 w = rect->w;
754 h = rect->h;
755 #if 0
756 printf("Hardware accelerated rectangle fill: %dx%d at %d,%d\n", w, h, x, y);
757 #endif
758 XDGAFillRectangle(DGA_Display, DGA_Screen, x, y, w, h, color);
759 sync_needed++;
760 XFlush(DGA_Display);
761 return(0);
762 }
763
764 static int HWAccelBlit(SDL_Surface *src, SDL_Rect *srcrect,
765 SDL_Surface *dst, SDL_Rect *dstrect)
766 {
767 SDL_VideoDevice *this;
768 int srcx, srcy;
769 int dstx, dsty;
770 unsigned int w, h;
771
772 this = current_video;
773 /* Don't blit to the visible part of the screen, wait until flipped */
774 if ( was_flipped && (dst == this->screen) ) {
775 while ( XDGAGetViewportStatus(DGA_Display, DGA_Screen) )
776 /* Keep waiting for the hardware ... */ ;
777 was_flipped = 0;
778 }
779 dst_to_xy(this, src, &srcx, &srcy);
780 srcx += srcrect->x;
781 srcy += srcrect->y;
782 dst_to_xy(this, dst, &dstx, &dsty);
783 dstx += dstrect->x;
784 dsty += dstrect->y;
785 w = srcrect->w;
786 h = srcrect->h;
787 #if 0
788 printf("Blitting %dx%d from %d,%d to %d,%d\n", w, h, srcx, srcy, dstx, dsty);
789 #endif
790 if ( (src->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) {
791 XDGACopyTransparentArea(DGA_Display, DGA_Screen,
792 srcx, srcy, w, h, dstx, dsty, src->format->colorkey);
793 } else {
794 XDGACopyArea(DGA_Display, DGA_Screen,
795 srcx, srcy, w, h, dstx, dsty);
796 }
797 sync_needed++;
798 XFlush(DGA_Display);
799 return(0);
800 }
801
802 static int DGA_CheckHWBlit(_THIS, SDL_Surface *src, SDL_Surface *dst)
803 {
804 int accelerated;
805
806 /* Set initial acceleration on */
807 src->flags |= SDL_HWACCEL;
808
809 /* Set the surface attributes */
810 if ( (src->flags & SDL_SRCALPHA) == SDL_SRCALPHA ) {
811 if ( ! this->info.blit_hw_A ) {
812 src->flags &= ~SDL_HWACCEL;
813 }
814 }
815 if ( (src->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) {
816 if ( ! this->info.blit_hw_CC ) {
817 src->flags &= ~SDL_HWACCEL;
818 }
819 }
820
821 /* Check to see if final surface blit is accelerated */
822 accelerated = !!(src->flags & SDL_HWACCEL);
823 if ( accelerated ) {
824 src->map->hw_blit = HWAccelBlit;
825 }
826 return(accelerated);
827 }
828
829 static __inline__ void DGA_WaitHardware(_THIS)
830 {
831 if ( sync_needed ) {
832 XDGASync(DGA_Display, DGA_Screen);
833 sync_needed = 0;
834 }
835 if ( was_flipped ) {
836 while ( XDGAGetViewportStatus(DGA_Display, DGA_Screen) )
837 /* Keep waiting for the hardware ... */ ;
838 was_flipped = 0;
839 }
840 }
841
842 static int DGA_LockHWSurface(_THIS, SDL_Surface *surface)
843 {
844 if ( surface == SDL_VideoSurface ) {
845 SDL_mutexP(hw_lock);
846 DGA_WaitHardware(this);
847 }
848 return(0);
849 }
850 static void DGA_UnlockHWSurface(_THIS, SDL_Surface *surface)
851 {
852 if ( surface == SDL_VideoSurface ) {
853 SDL_mutexV(hw_lock);
854 }
855 }
856
857 static int DGA_FlipHWSurface(_THIS, SDL_Surface *surface)
858 {
859 /* Wait for vertical retrace and then flip display */
860 DGA_WaitHardware(this);
861 XDGASetViewport(DGA_Display, DGA_Screen,
862 0, flip_yoffset[flip_page], XDGAFlipRetrace);
863 XFlush(DGA_Display);
864 was_flipped = 1;
865 flip_page = !flip_page;
866
867 surface->pixels = flip_address[flip_page];
868 return(0);
869 }
870
871 static void DGA_DirectUpdate(_THIS, int numrects, SDL_Rect *rects)
872 {
873 /* The application is already updating the visible video memory */
874 return;
875 }
876
877 static int DGA_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors)
878 {
879 int i;
880 XColor *xcmap;
881
882 /* This happens on initialization */
883 if ( ! DGA_colormap ) {
884 return(0);
885 }
886 xcmap = (XColor *)alloca(ncolors*sizeof(*xcmap));
887 for ( i=0; i<ncolors; ++i ) {
888 xcmap[i].pixel = firstcolor + i;
889 xcmap[i].red = (colors[i].r<<8)|colors[i].r;
890 xcmap[i].green = (colors[i].g<<8)|colors[i].g;
891 xcmap[i].blue = (colors[i].b<<8)|colors[i].b;
892 xcmap[i].flags = (DoRed|DoGreen|DoBlue);
893 }
894 XStoreColors(DGA_Display, DGA_colormap, xcmap, ncolors);
895 XSync(DGA_Display, False);
896
897 /* That was easy. :) */
898 return(1);
899 }
900
901 int DGA_SetGammaRamp(_THIS, Uint16 *ramp)
902 {
903 int i, ncolors;
904 XColor xcmap[256];
905
906 /* See if actually setting the gamma is supported */
907 if ( DGA_visualClass != DirectColor ) {
908 SDL_SetError("Gamma correction not supported on this visual");
909 return(-1);
910 }
911
912 /* Calculate the appropriate palette for the given gamma ramp */
913 if ( this->screen->format->BitsPerPixel <= 16 ) {
914 ncolors = 64; /* Is this right? */
915 } else {
916 ncolors = 256;
917 }
918 for ( i=0; i<ncolors; ++i ) {
919 Uint8 c = (256 * i / ncolors);
920 xcmap[i].pixel = SDL_MapRGB(this->screen->format, c, c, c);
921 xcmap[i].red = ramp[0*256+c];
922 xcmap[i].green = ramp[1*256+c];
923 xcmap[i].blue = ramp[2*256+c];
924 xcmap[i].flags = (DoRed|DoGreen|DoBlue);
925 }
926 XStoreColors(DGA_Display, DGA_colormap, xcmap, ncolors);
927 XSync(DGA_Display, False);
928 return(0);
929 }
930
931 void DGA_VideoQuit(_THIS)
932 {
933 int i, j;
934
935 if ( DGA_Display ) {
936 /* Free colormap, if necessary */
937 if ( DGA_colormap ) {
938 XFreeColormap(DGA_Display, DGA_colormap);
939 DGA_colormap = 0;
940 }
941
942 /* Unmap memory and reset video mode */
943 XDGACloseFramebuffer(DGA_Display, DGA_Screen);
944 if ( this->screen ) {
945 /* Tell SDL not to free the pixels */
946 this->screen->pixels = NULL;
947 }
948 XDGASetMode(DGA_Display, DGA_Screen, 0);
949
950 /* Clear the lock mutex */
951 if ( hw_lock != NULL ) {
952 SDL_DestroyMutex(hw_lock);
953 hw_lock = NULL;
954 }
955
956 /* Clean up defined video modes */
957 for ( i=0; i<NUM_MODELISTS; ++i ) {
958 if ( SDL_modelist[i] != NULL ) {
959 for ( j=0; SDL_modelist[i][j]; ++j ) {
960 free(SDL_modelist[i][j]);
961 }
962 free(SDL_modelist[i]);
963 SDL_modelist[i] = NULL;
964 }
965 }
966
967 /* Clean up the memory bucket list */
968 DGA_FreeHWSurfaces(this);
969
970 /* Close up the display */
971 XCloseDisplay(DGA_Display);
972 }
973 }