/
SDL_dgavideo.c
1069 lines (958 loc) · 28.5 KB
1
/*
2
3
SDL - Simple DirectMedia Layer
Copyright (C) 1997-2006 Sam Lantinga
4
5
6
7
8
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
9
10
11
12
13
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
14
15
16
17
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18
19
20
Sam Lantinga
slouken@libsdl.org
21
22
23
24
25
26
27
28
*/
/* DGA 2.0 based SDL video driver implementation.
*/
#include <stdlib.h>
#include <string.h>
#include <X11/Xlib.h>
29
#include <Xext/extensions/xf86dga.h>
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
#ifdef HAVE_ALLOCA_H
#include <alloca.h>
#endif
#include "SDL.h"
#include "SDL_error.h"
#include "SDL_video.h"
#include "SDL_mouse.h"
#include "SDL_sysvideo.h"
#include "SDL_pixels_c.h"
#include "SDL_events_c.h"
#include "SDL_dgavideo.h"
#include "SDL_dgamouse_c.h"
#include "SDL_dgaevents_c.h"
46
47
48
/* get function pointers... */
#include "../x11/SDL_x11dyn.h"
49
50
51
52
53
54
55
56
57
58
/* Initialization/Query functions */
static int DGA_VideoInit(_THIS, SDL_PixelFormat *vformat);
static SDL_Rect **DGA_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags);
static SDL_Surface *DGA_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags);
static int DGA_SetColors(_THIS, int firstcolor, int ncolors,
SDL_Color *colors);
static int DGA_SetGammaRamp(_THIS, Uint16 *ramp);
static void DGA_VideoQuit(_THIS);
/* Hardware surface functions */
59
static int DGA_InitHWSurfaces(_THIS, SDL_Surface *screen, Uint8 *base, int size);
60
61
62
63
64
65
66
67
68
69
70
71
72
static void DGA_FreeHWSurfaces(_THIS);
static int DGA_AllocHWSurface(_THIS, SDL_Surface *surface);
static int DGA_FillHWRect(_THIS, SDL_Surface *dst, SDL_Rect *rect, Uint32 color);
static int DGA_CheckHWBlit(_THIS, SDL_Surface *src, SDL_Surface *dst);
static int DGA_LockHWSurface(_THIS, SDL_Surface *surface);
static void DGA_UnlockHWSurface(_THIS, SDL_Surface *surface);
static void DGA_FreeHWSurface(_THIS, SDL_Surface *surface);
static int DGA_FlipHWSurface(_THIS, SDL_Surface *surface);
/* DGA driver bootstrap functions */
static int DGA_Available(void)
{
73
74
75
const char *display = NULL;
Display *dpy = NULL;
int available = 0;
76
77
78
79
/* The driver is available is available if the display is local
and the DGA 2.0+ extension is available, and we can map mem.
*/
80
if ( SDL_X11_LoadSymbols() ) {
81
82
if ( (SDL_strncmp(pXDisplayName(display), ":", 1) == 0) ||
(SDL_strncmp(pXDisplayName(display), "unix:", 5) == 0) ) {
83
84
85
86
87
88
89
90
91
92
93
94
95
96
dpy = pXOpenDisplay(display);
if ( dpy ) {
int events, errors, major, minor;
if ( SDL_NAME(XDGAQueryExtension)(dpy, &events, &errors) &&
SDL_NAME(XDGAQueryVersion)(dpy, &major, &minor) ) {
int screen;
screen = DefaultScreen(dpy);
if ( (major >= 2) &&
SDL_NAME(XDGAOpenFramebuffer)(dpy, screen) ) {
available = 1;
SDL_NAME(XDGACloseFramebuffer)(dpy, screen);
}
97
}
98
pXCloseDisplay(dpy);
99
100
}
}
101
SDL_X11_UnloadSymbols();
102
103
104
105
106
107
}
return(available);
}
static void DGA_DeleteDevice(SDL_VideoDevice *device)
{
108
if (device != NULL) {
109
110
SDL_free(device->hidden);
SDL_free(device);
111
112
SDL_X11_UnloadSymbols();
}
113
114
115
116
}
static SDL_VideoDevice *DGA_CreateDevice(int devindex)
{
117
SDL_VideoDevice *device = NULL;
118
119
/* Initialize all variables that we clean on shutdown */
120
if (SDL_X11_LoadSymbols()) {
121
device = (SDL_VideoDevice *)SDL_malloc(sizeof(SDL_VideoDevice));
122
if ( device ) {
123
SDL_memset(device, 0, (sizeof *device));
124
device->hidden = (struct SDL_PrivateVideoData *)
125
SDL_malloc((sizeof *device->hidden));
126
}
127
128
129
if ( (device == NULL) || (device->hidden == NULL) ) {
SDL_OutOfMemory();
if ( device ) {
130
SDL_free(device);
131
132
133
134
}
SDL_X11_UnloadSymbols();
return(0);
}
135
SDL_memset(device->hidden, 0, (sizeof *device->hidden));
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
/* Set the function pointers */
device->VideoInit = DGA_VideoInit;
device->ListModes = DGA_ListModes;
device->SetVideoMode = DGA_SetVideoMode;
device->SetColors = DGA_SetColors;
device->UpdateRects = NULL;
device->VideoQuit = DGA_VideoQuit;
device->AllocHWSurface = DGA_AllocHWSurface;
device->CheckHWBlit = DGA_CheckHWBlit;
device->FillHWRect = DGA_FillHWRect;
device->SetHWColorKey = NULL;
device->SetHWAlpha = NULL;
device->LockHWSurface = DGA_LockHWSurface;
device->UnlockHWSurface = DGA_UnlockHWSurface;
device->FlipHWSurface = DGA_FlipHWSurface;
device->FreeHWSurface = DGA_FreeHWSurface;
device->SetGammaRamp = DGA_SetGammaRamp;
device->GetGammaRamp = NULL;
device->SetCaption = NULL;
device->SetIcon = NULL;
device->IconifyWindow = NULL;
device->GrabInput = NULL;
device->GetWMInfo = NULL;
device->InitOSKeymap = DGA_InitOSKeymap;
device->PumpEvents = DGA_PumpEvents;
device->free = DGA_DeleteDevice;
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
}
return device;
}
VideoBootStrap DGA_bootstrap = {
"dga", "XFree86 DGA 2.0",
DGA_Available, DGA_CreateDevice
};
static int DGA_AddMode(_THIS, int bpp, int w, int h)
{
SDL_Rect *mode;
int i, index;
int next_mode;
/* Check to see if we already have this mode */
if ( bpp < 8 ) { /* Not supported */
return(0);
}
index = ((bpp+7)/8)-1;
for ( i=0; i<SDL_nummodes[index]; ++i ) {
mode = SDL_modelist[index][i];
if ( (mode->w == w) && (mode->h == h) ) {
return(0);
}
}
/* Set up the new video mode rectangle */
193
mode = (SDL_Rect *)SDL_malloc(sizeof *mode);
194
195
196
197
198
199
200
201
202
203
204
205
if ( mode == NULL ) {
SDL_OutOfMemory();
return(-1);
}
mode->x = 0;
mode->y = 0;
mode->w = w;
mode->h = h;
/* Allocate the new list of modes, and fill in the new mode */
next_mode = SDL_nummodes[index];
SDL_modelist[index] = (SDL_Rect **)
206
SDL_realloc(SDL_modelist[index], (1+next_mode+1)*sizeof(SDL_Rect *));
207
208
209
if ( SDL_modelist[index] == NULL ) {
SDL_OutOfMemory();
SDL_nummodes[index] = 0;
210
SDL_free(mode);
211
212
213
214
215
216
217
218
219
220
221
222
223
return(-1);
}
SDL_modelist[index][next_mode] = mode;
SDL_modelist[index][next_mode+1] = NULL;
SDL_nummodes[index]++;
return(0);
}
/* This whole function is a hack. :) */
static Uint32 get_video_size(_THIS)
{
/* This is a non-exported function from libXxf86dga.a */
224
extern unsigned char *SDL_NAME(XDGAGetMappedMemory)(int screen);
225
226
227
228
229
230
FILE *proc;
unsigned long mem;
unsigned start, stop;
char line[BUFSIZ];
Uint32 size;
231
mem = (unsigned long)SDL_NAME(XDGAGetMappedMemory)(DGA_Screen);
232
233
234
235
size = 0;
proc = fopen("/proc/self/maps", "r");
if ( proc ) {
while ( fgets(line, sizeof(line)-1, proc) ) {
236
SDL_sscanf(line, "%x-%x", &start, &stop);
237
238
239
240
241
242
243
244
245
246
247
if ( start == mem ) {
size = (Uint32)((stop-start)/1024);
break;
}
}
fclose(proc);
}
return(size);
}
#ifdef DGA_DEBUG
248
static void PrintMode(SDL_NAME(XDGAMode) *mode)
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
{
printf("Mode: %s (%dx%d) at %d bpp (%f refresh, %d pitch) num: %d\n",
mode->name,
mode->viewportWidth, mode->viewportHeight,
mode->depth == 24 ? mode->bitsPerPixel : mode->depth,
mode->verticalRefresh, mode->bytesPerScanline, mode->num);
printf("\tRGB: 0x%8.8x 0x%8.8x 0x%8.8x (%d - %s)\n",
mode->redMask, mode->greenMask, mode->blueMask,
mode->visualClass,
mode->visualClass == TrueColor ? "truecolor" :
mode->visualClass == DirectColor ? "directcolor" :
mode->visualClass == PseudoColor ? "pseudocolor" : "unknown");
printf("\tFlags: ");
if ( mode->flags & XDGAConcurrentAccess )
printf(" XDGAConcurrentAccess");
if ( mode->flags & XDGASolidFillRect )
printf(" XDGASolidFillRect");
if ( mode->flags & XDGABlitRect )
printf(" XDGABlitRect");
if ( mode->flags & XDGABlitTransRect )
printf(" XDGABlitTransRect");
if ( mode->flags & XDGAPixmap )
printf(" XDGAPixmap");
if ( mode->flags & XDGAInterlaced )
printf(" XDGAInterlaced");
if ( mode->flags & XDGADoublescan )
printf(" XDGADoublescan");
if ( mode->viewportFlags & XDGAFlipRetrace )
printf(" XDGAFlipRetrace");
if ( mode->viewportFlags & XDGAFlipImmediate )
printf(" XDGAFlipImmediate");
printf("\n");
}
#endif /* DGA_DEBUG */
static int cmpmodes(const void *va, const void *vb)
{
286
287
const SDL_NAME(XDGAMode) *a = (const SDL_NAME(XDGAMode) *)va;
const SDL_NAME(XDGAMode) *b = (const SDL_NAME(XDGAMode) *)vb;
288
289
290
291
/* Prefer DirectColor visuals for otherwise equal modes */
if ( (a->viewportWidth == b->viewportWidth) &&
(b->viewportHeight == a->viewportHeight) ) {
292
if ( a->visualClass == DirectColor )
293
return -1;
294
295
296
297
if ( b->visualClass == DirectColor )
return 1;
return 0;
} else if ( a->viewportWidth == b->viewportWidth ) {
298
return b->viewportHeight - a->viewportHeight;
299
300
} else {
return b->viewportWidth - a->viewportWidth;
301
302
}
}
303
static void UpdateHWInfo(_THIS, SDL_NAME(XDGAMode) *mode)
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
{
this->info.wm_available = 0;
this->info.hw_available = 1;
if ( mode->flags & XDGABlitRect ) {
this->info.blit_hw = 1;
} else {
this->info.blit_hw = 0;
}
if ( mode->flags & XDGABlitTransRect ) {
this->info.blit_hw_CC = 1;
} else {
this->info.blit_hw_CC = 0;
}
if ( mode->flags & XDGASolidFillRect ) {
this->info.blit_fill = 1;
} else {
this->info.blit_fill = 0;
}
this->info.video_mem = get_video_size(this);
}
static int DGA_VideoInit(_THIS, SDL_PixelFormat *vformat)
{
const char *display;
int event_base, error_base;
int major_version, minor_version;
Visual *visual;
331
SDL_NAME(XDGAMode) *modes;
332
333
334
335
336
int i, num_modes;
/* Open the X11 display */
display = NULL; /* Get it from DISPLAY environment variable */
337
DGA_Display = pXOpenDisplay(display);
338
339
340
341
342
343
if ( DGA_Display == NULL ) {
SDL_SetError("Couldn't open X11 display");
return(-1);
}
/* Check for the DGA extension */
344
345
if ( ! SDL_NAME(XDGAQueryExtension)(DGA_Display, &event_base, &error_base) ||
! SDL_NAME(XDGAQueryVersion)(DGA_Display, &major_version, &minor_version) ) {
346
SDL_SetError("DGA extension not available");
347
pXCloseDisplay(DGA_Display);
348
349
350
351
return(-1);
}
if ( major_version < 2 ) {
SDL_SetError("DGA driver requires DGA 2.0 or newer");
352
pXCloseDisplay(DGA_Display);
353
354
355
356
357
358
359
360
361
362
363
return(-1);
}
DGA_event_base = event_base;
/* Determine the current screen depth */
visual = DefaultVisual(DGA_Display, DGA_Screen);
{
XPixmapFormatValues *pix_format;
int i, num_formats;
vformat->BitsPerPixel = DefaultDepth(DGA_Display, DGA_Screen);
364
pix_format = pXListPixmapFormats(DGA_Display, &num_formats);
365
366
if ( pix_format == NULL ) {
SDL_SetError("Couldn't determine screen formats");
367
pXCloseDisplay(DGA_Display);
368
369
370
371
372
373
374
375
return(-1);
}
for ( i=0; i<num_formats; ++i ) {
if ( vformat->BitsPerPixel == pix_format[i].depth )
break;
}
if ( i != num_formats )
vformat->BitsPerPixel = pix_format[i].bits_per_pixel;
376
pXFree((char *)pix_format);
377
378
379
380
381
382
383
384
}
if ( vformat->BitsPerPixel > 8 ) {
vformat->Rmask = visual->red_mask;
vformat->Gmask = visual->green_mask;
vformat->Bmask = visual->blue_mask;
}
/* Open access to the framebuffer */
385
if ( ! SDL_NAME(XDGAOpenFramebuffer)(DGA_Display, DGA_Screen) ) {
386
SDL_SetError("Unable to map the video memory");
387
pXCloseDisplay(DGA_Display);
388
389
390
391
return(-1);
}
/* Query for the list of available video modes */
392
modes = SDL_NAME(XDGAQueryModes)(DGA_Display, DGA_Screen, &num_modes);
393
394
395
396
397
398
399
400
401
402
403
404
405
406
qsort(modes, num_modes, sizeof *modes, cmpmodes);
for ( i=0; i<num_modes; ++i ) {
#ifdef DGA_DEBUG
PrintMode(&modes[i]);
#endif
if ( (modes[i].visualClass == PseudoColor) ||
(modes[i].visualClass == DirectColor) ||
(modes[i].visualClass == TrueColor) ) {
DGA_AddMode(this, modes[i].bitsPerPixel,
modes[i].viewportWidth,
modes[i].viewportHeight);
}
}
UpdateHWInfo(this, modes);
407
pXFree(modes);
408
409
410
411
412
413
414
415
416
/* Create the hardware surface lock mutex */
hw_lock = SDL_CreateMutex();
if ( hw_lock == NULL ) {
SDL_SetError("Unable to create lock mutex");
DGA_VideoQuit(this);
return(-1);
}
417
418
419
420
421
#ifdef LOCK_DGA_DISPLAY
/* Create the event lock so we're thread-safe.. :-/ */
event_lock = SDL_CreateMutex();
#endif /* LOCK_DGA_DISPLAY */
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
/* We're done! */
return(0);
}
SDL_Rect **DGA_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags)
{
return(SDL_modelist[((format->BitsPerPixel+7)/8)-1]);
}
/* Various screen update functions available */
static void DGA_DirectUpdate(_THIS, int numrects, SDL_Rect *rects);
SDL_Surface *DGA_SetVideoMode(_THIS, SDL_Surface *current,
int width, int height, int bpp, Uint32 flags)
{
437
SDL_NAME(XDGAMode) *modes;
438
int i, num_modes;
439
SDL_NAME(XDGADevice) *mode;
440
441
442
443
444
445
int screen_len;
Uint8 *surfaces_mem;
int surfaces_len;
/* Free any previous colormap */
if ( DGA_colormap ) {
446
pXFreeColormap(DGA_Display, DGA_colormap);
447
448
449
450
DGA_colormap = 0;
}
/* Search for a matching video mode */
451
modes = SDL_NAME(XDGAQueryModes)(DGA_Display, DGA_Screen, &num_modes);
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
qsort(modes, num_modes, sizeof *modes, cmpmodes);
for ( i=0; i<num_modes; ++i ) {
int depth;
depth = modes[i].depth;
if ( depth == 24 ) { /* Distinguish between 24 and 32 bpp */
depth = modes[i].bitsPerPixel;
}
if ( (depth == bpp) &&
(modes[i].viewportWidth == width) &&
(modes[i].viewportHeight == height) &&
((modes[i].visualClass == PseudoColor) ||
(modes[i].visualClass == DirectColor) ||
(modes[i].visualClass == TrueColor)) ) {
break;
}
}
if ( i == num_modes ) {
SDL_SetError("No matching video mode found");
return(NULL);
}
/* Set the video mode */
476
mode = SDL_NAME(XDGASetMode)(DGA_Display, DGA_Screen, modes[i].num);
477
pXFree(modes);
478
479
480
481
if ( mode == NULL ) {
SDL_SetError("Unable to switch to requested mode");
return(NULL);
}
482
DGA_visualClass = mode->mode.visualClass;
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
memory_base = (Uint8 *)mode->data;
memory_pitch = mode->mode.bytesPerScanline;
/* Set up the new mode framebuffer */
current->flags = (SDL_FULLSCREEN|SDL_HWSURFACE);
current->w = mode->mode.viewportWidth;
current->h = mode->mode.viewportHeight;
current->pitch = memory_pitch;
current->pixels = memory_base;
if ( ! SDL_ReallocFormat(current, mode->mode.bitsPerPixel,
mode->mode.redMask,
mode->mode.greenMask,
mode->mode.blueMask, 0) ) {
return(NULL);
}
screen_len = current->h*current->pitch;
/* Create a colormap if necessary */
if ( (DGA_visualClass == PseudoColor) ||
(DGA_visualClass == DirectColor) ) {
503
DGA_colormap = SDL_NAME(XDGACreateColormap)(DGA_Display, DGA_Screen,
504
505
506
507
508
509
510
511
512
513
514
mode, AllocAll);
if ( DGA_visualClass == PseudoColor ) {
current->flags |= SDL_HWPALETTE;
} else {
/* Initialize the colormap to the identity mapping */
SDL_GetGammaRamp(0, 0, 0);
this->screen = current;
DGA_SetGammaRamp(this, this->gamma);
this->screen = NULL;
}
} else {
515
DGA_colormap = SDL_NAME(XDGACreateColormap)(DGA_Display, DGA_Screen,
516
517
mode, AllocNone);
}
518
SDL_NAME(XDGAInstallColormap)(DGA_Display, DGA_Screen, DGA_colormap);
519
520
521
522
523
524
525
526
527
/* Update the hardware capabilities */
UpdateHWInfo(this, &mode->mode);
/* Set up the information for hardware surfaces */
surfaces_mem = (Uint8 *)current->pixels + screen_len;
surfaces_len = (mode->mode.imageHeight*current->pitch - screen_len);
/* Update for double-buffering, if we can */
528
SDL_NAME(XDGASetViewport)(DGA_Display, DGA_Screen, 0, 0, XDGAFlipRetrace);
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
if ( flags & SDL_DOUBLEBUF ) {
if ( mode->mode.imageHeight >= (current->h*2) ) {
current->flags |= SDL_DOUBLEBUF;
flip_page = 0;
flip_yoffset[0] = 0;
flip_yoffset[1] = current->h;
flip_address[0] = memory_base;
flip_address[1] = memory_base+screen_len;
surfaces_mem += screen_len;
surfaces_len -= screen_len;
}
}
/* Allocate memory tracking for hardware surfaces */
DGA_FreeHWSurfaces(this);
if ( surfaces_len < 0 ) {
surfaces_len = 0;
}
547
DGA_InitHWSurfaces(this, current, surfaces_mem, surfaces_len);
548
549
550
551
552
553
554
555
/* Expose the back buffer as surface memory */
if ( current->flags & SDL_DOUBLEBUF ) {
this->screen = current;
DGA_FlipHWSurface(this, current);
this->screen = NULL;
}
556
557
558
559
560
561
562
563
/* Set the update rectangle function */
this->UpdateRects = DGA_DirectUpdate;
/* Enable mouse and keyboard support */
{ long input_mask;
input_mask = (KeyPressMask | KeyReleaseMask);
input_mask |= (ButtonPressMask | ButtonReleaseMask);
input_mask |= PointerMotionMask;
564
SDL_NAME(XDGASelectInput)(DGA_Display, DGA_Screen, input_mask);
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
}
/* We're done */
return(current);
}
#ifdef DGA_DEBUG
static void DGA_DumpHWSurfaces(_THIS)
{
vidmem_bucket *bucket;
printf("Memory left: %d (%d total)\n", surfaces_memleft, surfaces_memtotal);
printf("\n");
printf(" Base Size\n");
for ( bucket=&surfaces; bucket; bucket=bucket->next ) {
printf("Bucket: %p, %d (%s)\n", bucket->base, bucket->size, bucket->used ? "used" : "free");
if ( bucket->prev ) {
if ( bucket->base != bucket->prev->base+bucket->prev->size ) {
printf("Warning, corrupt bucket list! (prev)\n");
}
} else {
if ( bucket != &surfaces ) {
printf("Warning, corrupt bucket list! (!prev)\n");
}
}
if ( bucket->next ) {
if ( bucket->next->base != bucket->base+bucket->size ) {
printf("Warning, corrupt bucket list! (next)\n");
}
}
}
printf("\n");
}
#endif
600
static int DGA_InitHWSurfaces(_THIS, SDL_Surface *screen, Uint8 *base, int size)
601
{
602
603
vidmem_bucket *bucket;
604
605
surfaces_memtotal = size;
surfaces_memleft = size;
606
607
if ( surfaces_memleft > 0 ) {
608
bucket = (vidmem_bucket *)SDL_malloc(sizeof(*bucket));
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
if ( bucket == NULL ) {
SDL_OutOfMemory();
return(-1);
}
bucket->prev = &surfaces;
bucket->used = 0;
bucket->dirty = 0;
bucket->base = base;
bucket->size = size;
bucket->next = NULL;
} else {
bucket = NULL;
}
surfaces.prev = NULL;
surfaces.used = 1;
surfaces.dirty = 0;
surfaces.base = screen->pixels;
surfaces.size = (unsigned int)((long)base - (long)surfaces.base);
surfaces.next = bucket;
screen->hwdata = (struct private_hwdata *)&surfaces;
630
631
632
633
634
635
636
637
638
639
return(0);
}
static void DGA_FreeHWSurfaces(_THIS)
{
vidmem_bucket *bucket, *freeable;
bucket = surfaces.next;
while ( bucket ) {
freeable = bucket;
bucket = bucket->next;
640
SDL_free(freeable);
641
642
643
644
}
surfaces.next = NULL;
}
645
static __inline__ void DGA_AddBusySurface(SDL_Surface *surface)
646
647
648
649
{
((vidmem_bucket *)surface->hwdata)->dirty = 1;
}
650
static __inline__ int DGA_IsSurfaceBusy(SDL_Surface *surface)
651
652
653
654
{
return ((vidmem_bucket *)surface->hwdata)->dirty;
}
655
static __inline__ void DGA_WaitBusySurfaces(_THIS)
656
657
658
659
{
vidmem_bucket *bucket;
/* Wait for graphic operations to complete */
660
SDL_NAME(XDGASync)(DGA_Display, DGA_Screen);
661
662
663
664
665
666
667
/* Clear all surface dirty bits */
for ( bucket=&surfaces; bucket; bucket=bucket->next ) {
bucket->dirty = 0;
}
}
668
669
670
671
672
static int DGA_AllocHWSurface(_THIS, SDL_Surface *surface)
{
vidmem_bucket *bucket;
int size;
int extra;
673
int retval = 0;
674
675
676
677
678
679
680
681
682
683
684
685
686
687
/* Temporarily, we only allow surfaces the same width as display.
Some blitters require the pitch between two hardware surfaces
to be the same. Others have interesting alignment restrictions.
*/
if ( surface->pitch > SDL_VideoSurface->pitch ) {
SDL_SetError("Surface requested wider than screen");
return(-1);
}
surface->pitch = SDL_VideoSurface->pitch;
size = surface->h * surface->pitch;
#ifdef DGA_DEBUG
fprintf(stderr, "Allocating bucket of %d bytes\n", size);
#endif
688
LOCK_DISPLAY();
689
690
691
692
/* Quick check for available mem */
if ( size > surfaces_memleft ) {
SDL_SetError("Not enough video memory");
693
694
retval = -1;
goto done;
695
696
697
698
699
700
701
702
703
704
}
/* Search for an empty bucket big enough */
for ( bucket=&surfaces; bucket; bucket=bucket->next ) {
if ( ! bucket->used && (size <= bucket->size) ) {
break;
}
}
if ( bucket == NULL ) {
SDL_SetError("Video memory too fragmented");
705
706
retval = -1;
goto done;
707
708
709
710
711
712
713
714
715
716
}
/* Create a new bucket for left-over memory */
extra = (bucket->size - size);
if ( extra ) {
vidmem_bucket *newbucket;
#ifdef DGA_DEBUG
fprintf(stderr, "Adding new free bucket of %d bytes\n", extra);
#endif
717
newbucket = (vidmem_bucket *)SDL_malloc(sizeof(*newbucket));
718
719
if ( newbucket == NULL ) {
SDL_OutOfMemory();
720
721
retval = -1;
goto done;
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
}
newbucket->prev = bucket;
newbucket->used = 0;
newbucket->base = bucket->base+size;
newbucket->size = extra;
newbucket->next = bucket->next;
if ( bucket->next ) {
bucket->next->prev = newbucket;
}
bucket->next = newbucket;
}
/* Set the current bucket values and return it! */
bucket->used = 1;
bucket->size = size;
737
bucket->dirty = 0;
738
739
740
741
742
743
#ifdef DGA_DEBUG
fprintf(stderr, "Allocated %d bytes at %p\n", bucket->size, bucket->base);
#endif
surfaces_memleft -= size;
surface->flags |= SDL_HWSURFACE;
surface->pixels = bucket->base;
744
745
746
747
surface->hwdata = (struct private_hwdata *)bucket;
done:
UNLOCK_DISPLAY();
return(retval);
748
749
750
751
752
753
}
static void DGA_FreeHWSurface(_THIS, SDL_Surface *surface)
{
vidmem_bucket *bucket, *freeable;
/* Look for the bucket in the current list */
754
755
756
757
for ( bucket=&surfaces; bucket; bucket=bucket->next ) {
if ( bucket == (vidmem_bucket *)surface->hwdata ) {
break;
}
758
}
759
760
if ( bucket && bucket->used ) {
/* Add the memory back to the total */
761
762
763
#ifdef DGA_DEBUG
printf("Freeing bucket of %d bytes\n", bucket->size);
#endif
764
surfaces_memleft += bucket->size;
765
766
767
768
/* Can we merge the space with surrounding buckets? */
bucket->used = 0;
if ( bucket->next && ! bucket->next->used ) {
769
770
771
#ifdef DGA_DEBUG
printf("Merging with next bucket, for %d total bytes\n", bucket->size+bucket->next->size);
#endif
772
773
774
775
776
777
freeable = bucket->next;
bucket->size += bucket->next->size;
bucket->next = bucket->next->next;
if ( bucket->next ) {
bucket->next->prev = bucket;
}
778
SDL_free(freeable);
779
}
780
if ( bucket->prev && ! bucket->prev->used ) {
781
782
783
#ifdef DGA_DEBUG
printf("Merging with previous bucket, for %d total bytes\n", bucket->prev->size+bucket->size);
#endif
784
785
786
787
788
789
freeable = bucket;
bucket->prev->size += bucket->size;
bucket->prev->next = bucket->next;
if ( bucket->next ) {
bucket->next->prev = bucket->prev;
}
790
SDL_free(freeable);
791
792
793
}
}
surface->pixels = NULL;
794
surface->hwdata = NULL;
795
796
}
797
static __inline__ void DGA_dst_to_xy(_THIS, SDL_Surface *dst, int *x, int *y)
798
799
800
801
802
803
804
805
806
807
808
{
*x = (long)((Uint8 *)dst->pixels - memory_base)%memory_pitch;
*y = (long)((Uint8 *)dst->pixels - memory_base)/memory_pitch;
}
static int DGA_FillHWRect(_THIS, SDL_Surface *dst, SDL_Rect *rect, Uint32 color)
{
int x, y;
unsigned int w, h;
/* Don't fill the visible part of the screen, wait until flipped */
809
LOCK_DISPLAY();
810
if ( was_flipped && (dst == this->screen) ) {
811
while ( SDL_NAME(XDGAGetViewportStatus)(DGA_Display, DGA_Screen) )
812
813
814
/* Keep waiting for the hardware ... */ ;
was_flipped = 0;
}
815
DGA_dst_to_xy(this, dst, &x, &y);
816
817
818
819
820
821
822
x += rect->x;
y += rect->y;
w = rect->w;
h = rect->h;
#if 0
printf("Hardware accelerated rectangle fill: %dx%d at %d,%d\n", w, h, x, y);
#endif
823
SDL_NAME(XDGAFillRectangle)(DGA_Display, DGA_Screen, x, y, w, h, color);
824
if ( !(this->screen->flags & SDL_DOUBLEBUF) ) {
825
pXFlush(DGA_Display);
826
}
827
DGA_AddBusySurface(dst);
828
UNLOCK_DISPLAY();
829
830
831
832
833
834
835
836
837
838
839
840
841
return(0);
}
static int HWAccelBlit(SDL_Surface *src, SDL_Rect *srcrect,
SDL_Surface *dst, SDL_Rect *dstrect)
{
SDL_VideoDevice *this;
int srcx, srcy;
int dstx, dsty;
unsigned int w, h;
this = current_video;
/* Don't blit to the visible part of the screen, wait until flipped */
842
LOCK_DISPLAY();
843
if ( was_flipped && (dst == this->screen) ) {
844
while ( SDL_NAME(XDGAGetViewportStatus)(DGA_Display, DGA_Screen) )
845
846
847
/* Keep waiting for the hardware ... */ ;
was_flipped = 0;
}
848
DGA_dst_to_xy(this, src, &srcx, &srcy);
849
850
srcx += srcrect->x;
srcy += srcrect->y;
851
DGA_dst_to_xy(this, dst, &dstx, &dsty);
852
853
854
855
856
857
858
859
dstx += dstrect->x;
dsty += dstrect->y;
w = srcrect->w;
h = srcrect->h;
#if 0
printf("Blitting %dx%d from %d,%d to %d,%d\n", w, h, srcx, srcy, dstx, dsty);
#endif
if ( (src->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) {
860
SDL_NAME(XDGACopyTransparentArea)(DGA_Display, DGA_Screen,
861
862
srcx, srcy, w, h, dstx, dsty, src->format->colorkey);
} else {
863
SDL_NAME(XDGACopyArea)(DGA_Display, DGA_Screen,
864
865
srcx, srcy, w, h, dstx, dsty);
}
866
if ( !(this->screen->flags & SDL_DOUBLEBUF) ) {
867
pXFlush(DGA_Display);
868
}
869
870
DGA_AddBusySurface(src);
DGA_AddBusySurface(dst);
871
UNLOCK_DISPLAY();
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
return(0);
}
static int DGA_CheckHWBlit(_THIS, SDL_Surface *src, SDL_Surface *dst)
{
int accelerated;
/* Set initial acceleration on */
src->flags |= SDL_HWACCEL;
/* Set the surface attributes */
if ( (src->flags & SDL_SRCALPHA) == SDL_SRCALPHA ) {
if ( ! this->info.blit_hw_A ) {
src->flags &= ~SDL_HWACCEL;
}
}
if ( (src->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) {
if ( ! this->info.blit_hw_CC ) {
src->flags &= ~SDL_HWACCEL;
}
}
/* Check to see if final surface blit is accelerated */
accelerated = !!(src->flags & SDL_HWACCEL);
if ( accelerated ) {
src->map->hw_blit = HWAccelBlit;
}
return(accelerated);
}
902
static __inline__ void DGA_WaitFlip(_THIS)
903
904
{
if ( was_flipped ) {
905
while ( SDL_NAME(XDGAGetViewportStatus)(DGA_Display, DGA_Screen) )
906
907
908
909
910
911
912
/* Keep waiting for the hardware ... */ ;
was_flipped = 0;
}
}
static int DGA_LockHWSurface(_THIS, SDL_Surface *surface)
{
913
if ( surface == this->screen ) {
914
SDL_mutexP(hw_lock);
915
LOCK_DISPLAY();
916
917
if ( DGA_IsSurfaceBusy(surface) ) {
DGA_WaitBusySurfaces(this);
918
919
920
921
}
DGA_WaitFlip(this);
UNLOCK_DISPLAY();
} else {
922
if ( DGA_IsSurfaceBusy(surface) ) {
923
LOCK_DISPLAY();
924
DGA_WaitBusySurfaces(this);
925
926
UNLOCK_DISPLAY();
}
927
928
929
930
931
}
return(0);
}
static void DGA_UnlockHWSurface(_THIS, SDL_Surface *surface)
{
932
if ( surface == this->screen ) {
933
934
935
936
937
938
939
SDL_mutexV(hw_lock);
}
}
static int DGA_FlipHWSurface(_THIS, SDL_Surface *surface)
{
/* Wait for vertical retrace and then flip display */
940
LOCK_DISPLAY();
941
942
if ( DGA_IsSurfaceBusy(this->screen) ) {
DGA_WaitBusySurfaces(this);
943
944
}
DGA_WaitFlip(this);
945
SDL_NAME(XDGASetViewport)(DGA_Display, DGA_Screen,
946
0, flip_yoffset[flip_page], XDGAFlipRetrace);
947
pXFlush(DGA_Display);
948
UNLOCK_DISPLAY();
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
was_flipped = 1;
flip_page = !flip_page;
surface->pixels = flip_address[flip_page];
return(0);
}
static void DGA_DirectUpdate(_THIS, int numrects, SDL_Rect *rects)
{
/* The application is already updating the visible video memory */
return;
}
static int DGA_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors)
{
int i;
XColor *xcmap;
/* This happens on initialization */
if ( ! DGA_colormap ) {
return(0);
}
xcmap = (XColor *)alloca(ncolors*sizeof(*xcmap));
for ( i=0; i<ncolors; ++i ) {
xcmap[i].pixel = firstcolor + i;
xcmap[i].red = (colors[i].r<<8)|colors[i].r;
xcmap[i].green = (colors[i].g<<8)|colors[i].g;
xcmap[i].blue = (colors[i].b<<8)|colors[i].b;
xcmap[i].flags = (DoRed|DoGreen|DoBlue);
}
979
LOCK_DISPLAY();
980
981
pXStoreColors(DGA_Display, DGA_colormap, xcmap, ncolors);
pXSync(DGA_Display, False);
982
UNLOCK_DISPLAY();
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/* That was easy. :) */
return(1);
}
int DGA_SetGammaRamp(_THIS, Uint16 *ramp)
{
int i, ncolors;
XColor xcmap[256];
/* See if actually setting the gamma is supported */
if ( DGA_visualClass != DirectColor ) {
SDL_SetError("Gamma correction not supported on this visual");
return(-1);
}
/* Calculate the appropriate palette for the given gamma ramp */
if ( this->screen->format->BitsPerPixel <= 16 ) {