summaryrefslogtreecommitdiffstats
path: root/lib/libvgl/main.c
blob: ec7f4fe42c8ddca6b931015ce22a2b49dae6c0b6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
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
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
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
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
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
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
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
/*-
 * Copyright (c) 1991-1997 Søren Schmidt
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer
 *    in this position and unchanged.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software withough specific prior written permission
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");

#include <stdio.h>
#include <sys/types.h>
#include <sys/signal.h>
#include <sys/file.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/fbio.h>
#include <sys/kbio.h>
#include <sys/consio.h>
#include "vgl.h"

/* XXX Direct Color 24bits modes unsupported */

#define min(x, y)	(((x) < (y)) ? (x) : (y))
#define max(x, y)	(((x) > (y)) ? (x) : (y))

VGLBitmap *VGLDisplay;
video_info_t VGLModeInfo;
video_adapter_info_t VGLAdpInfo;
byte *VGLBuf;

static int VGLMode;
static int VGLOldMode;
static size_t VGLBufSize;
static byte *VGLMem = MAP_FAILED;
static int VGLSwitchPending;
static int VGLAbortPending;
static int VGLOnDisplay;
static unsigned int VGLCurWindow;
static int VGLInitDone = 0;
static vid_info_t VGLOldVInfo;

void
VGLEnd()
{
struct vt_mode smode;

  if (!VGLInitDone)
    return;
  VGLInitDone = 0;
  VGLSwitchPending = 0;
  VGLAbortPending = 0;

  signal(SIGUSR1, SIG_IGN);

  if (VGLMem != MAP_FAILED) {
    VGLClear(VGLDisplay, 0);
    munmap(VGLMem, VGLAdpInfo.va_window_size);
  }

  if (VGLOldMode >= M_VESA_BASE) {
    /* ugly, but necessary */
    ioctl(0, _IO('V', VGLOldMode - M_VESA_BASE), 0);
    if (VGLOldMode == M_VESA_800x600) {
      int size[3];
      size[0] = VGLOldVInfo.mv_csz;
      size[1] = VGLOldVInfo.mv_rsz;
      size[2] = 16;
      ioctl(0, KDRASTER, size);
    }
  } else {
    ioctl(0, _IO('S', VGLOldMode), 0);
  }
  ioctl(0, KDDISABIO, 0);
  ioctl(0, KDSETMODE, KD_TEXT);
  smode.mode = VT_AUTO;
  ioctl(0, VT_SETMODE, &smode);
  if (VGLBuf)
    free(VGLBuf);
  VGLBuf = NULL;
  free(VGLDisplay);
  VGLDisplay = NULL;
  VGLKeyboardEnd();
}

static void 
VGLAbort()
{
  VGLAbortPending = 1;
  signal(SIGINT, SIG_IGN);
  signal(SIGTERM, SIG_IGN);
  signal(SIGSEGV, SIG_IGN);
  signal(SIGBUS, SIG_IGN);
  signal(SIGUSR2, SIG_IGN);
}

static void
VGLSwitch()
{
  if (!VGLOnDisplay)
    VGLOnDisplay = 1;
  else
    VGLOnDisplay = 0;
  VGLSwitchPending = 1;
  signal(SIGUSR1, VGLSwitch);
}

int
VGLInit(int mode)
{
  struct vt_mode smode;
  int adptype;

  if (VGLInitDone)
    return -1;

  signal(SIGUSR1, VGLSwitch);
  signal(SIGINT, VGLAbort);
  signal(SIGTERM, VGLAbort);
  signal(SIGSEGV, VGLAbort);
  signal(SIGBUS, VGLAbort);
  signal(SIGUSR2, SIG_IGN);

  VGLOnDisplay = 1;
  VGLSwitchPending = 0;
  VGLAbortPending = 0;

  if (ioctl(0, CONS_GET, &VGLOldMode) || ioctl(0, CONS_CURRENT, &adptype))
    return -1;
  if (IOCGROUP(mode) == 'V')	/* XXX: this is ugly */
    VGLModeInfo.vi_mode = (mode & 0x0ff) + M_VESA_BASE;
  else
    VGLModeInfo.vi_mode = mode & 0x0ff;
  if (ioctl(0, CONS_MODEINFO, &VGLModeInfo))	/* FBIO_MODEINFO */
    return -1;

  /* If current mode is VESA_800x600 then save its geometry to restore later */
  if ((VGLOldMode >= M_VESA_BASE) && (VGLOldMode == M_VESA_800x600)) {
    VGLOldVInfo.size = sizeof(VGLOldVInfo);
    if (ioctl(0, CONS_GETINFO, &VGLOldVInfo))
      return -1;
  }

  VGLDisplay = (VGLBitmap *)malloc(sizeof(VGLBitmap));
  if (VGLDisplay == NULL)
    return -2;

  if (ioctl(0, KDENABIO, 0)) {
    free(VGLDisplay);
    return -3;
  }

  VGLInitDone = 1;

  /*
   * vi_mem_model specifies the memory model of the current video mode
   * in -CURRENT.
   */
  switch (VGLModeInfo.vi_mem_model) {
  case V_INFO_MM_PLANAR:
    /* we can handle EGA/VGA planner modes only */
    if (VGLModeInfo.vi_depth != 4 || VGLModeInfo.vi_planes != 4
	|| (adptype != KD_EGA && adptype != KD_VGA)) {
      VGLEnd();
      return -4;
    }
    VGLDisplay->Type = VIDBUF4;
    break;
  case V_INFO_MM_PACKED:
    /* we can do only 256 color packed modes */
    if (VGLModeInfo.vi_depth != 8) {
      VGLEnd();
      return -4;
    }
    VGLDisplay->Type = VIDBUF8;
    VGLDisplay->PixelBytes = 1;
    break;
  case V_INFO_MM_VGAX:
    VGLDisplay->Type = VIDBUF8X;
    VGLDisplay->PixelBytes = 1;
    break;
  case V_INFO_MM_DIRECT:
    VGLDisplay->PixelBytes = VGLModeInfo.vi_pixel_size;
    switch (VGLDisplay->PixelBytes) {
    case 2:
      VGLDisplay->Type = VIDBUF16;
      break;
#if notyet
    case 3:
      VGLDisplay->Type = VIDBUF24;
      break;
#endif
    case 4:
      VGLDisplay->Type = VIDBUF32;
      break;
    default:
      VGLEnd();
      return -4;
    }
    break;
  default:
    VGLEnd();
    return -4;
  }

  ioctl(0, VT_WAITACTIVE, 0);
  ioctl(0, KDSETMODE, KD_GRAPHICS);
  if (ioctl(0, mode, 0)) {
    VGLEnd();
    return -5;
  }
  if (ioctl(0, CONS_ADPINFO, &VGLAdpInfo)) {	/* FBIO_ADPINFO */
    VGLEnd();
    return -6;
  }

  /*
   * Calculate the shadow screen buffer size.  In -CURRENT, va_buffer_size
   * always holds the entire frame buffer size, wheather it's in the linear
   * mode or windowed mode.  
   *     VGLBufSize = VGLAdpInfo.va_buffer_size;
   * In -STABLE, va_buffer_size holds the frame buffer size, only if
   * the linear frame buffer mode is supported. Otherwise the field is zero.
   * We shall calculate the minimal size in this case:
   *     VGLAdpInfo.va_line_width*VGLModeInfo.vi_height*VGLModeInfo.vi_planes
   * or
   *     VGLAdpInfo.va_window_size*VGLModeInfo.vi_planes;
   * Use whichever is larger.
   */
  if (VGLAdpInfo.va_buffer_size != 0)
    VGLBufSize = VGLAdpInfo.va_buffer_size;
  else
    VGLBufSize = max(VGLAdpInfo.va_line_width*VGLModeInfo.vi_height,
		     VGLAdpInfo.va_window_size)*VGLModeInfo.vi_planes;
  VGLBuf = malloc(VGLBufSize);
  if (VGLBuf == NULL) {
    VGLEnd();
    return -7;
  }

#ifdef LIBVGL_DEBUG
  fprintf(stderr, "VGLBufSize:0x%x\n", VGLBufSize);
#endif

  /* see if we are in the windowed buffer mode or in the linear buffer mode */
  if (VGLBufSize/VGLModeInfo.vi_planes > VGLAdpInfo.va_window_size) {
    switch (VGLDisplay->Type) {
    case VIDBUF4:
      VGLDisplay->Type = VIDBUF4S;
      break;
    case VIDBUF8:
      VGLDisplay->Type = VIDBUF8S;
      break;
    case VIDBUF16:
      VGLDisplay->Type = VIDBUF16S;
      break;
    case VIDBUF24:
      VGLDisplay->Type = VIDBUF24S;
      break;
    case VIDBUF32:
      VGLDisplay->Type = VIDBUF32S;
      break;
    default:
      VGLEnd();
      return -8;
    }
  }

  VGLMode = mode;
  VGLCurWindow = 0;

  VGLDisplay->Xsize = VGLModeInfo.vi_width;
  VGLDisplay->Ysize = VGLModeInfo.vi_height;
  VGLDisplay->VXsize = VGLAdpInfo.va_line_width
			   *8/(VGLModeInfo.vi_depth/VGLModeInfo.vi_planes);
  VGLDisplay->VYsize = VGLBufSize/VGLModeInfo.vi_planes/VGLAdpInfo.va_line_width;
  VGLDisplay->Xorigin = 0;
  VGLDisplay->Yorigin = 0;

  VGLMem = (byte*)mmap(0, VGLAdpInfo.va_window_size, PROT_READ|PROT_WRITE,
		       MAP_FILE, 0, 0);
  if (VGLMem == MAP_FAILED) {
    VGLEnd();
    return -7;
  }
  VGLDisplay->Bitmap = VGLMem;

  VGLSavePalette();

#ifdef LIBVGL_DEBUG
  fprintf(stderr, "va_line_width:%d\n", VGLAdpInfo.va_line_width);
  fprintf(stderr, "VGLXsize:%d, Ysize:%d, VXsize:%d, VYsize:%d\n",
	  VGLDisplay->Xsize, VGLDisplay->Ysize, 
	  VGLDisplay->VXsize, VGLDisplay->VYsize);
#endif

  smode.mode = VT_PROCESS;
  smode.waitv = 0;
  smode.relsig = SIGUSR1;
  smode.acqsig = SIGUSR1;
  smode.frsig  = SIGINT;	
  if (ioctl(0, VT_SETMODE, &smode)) {
    VGLEnd();
    return -9;
  }
  VGLTextSetFontFile((byte*)0);
  VGLClear(VGLDisplay, 0);
  return 0;
}

void
VGLCheckSwitch()
{
  if (VGLAbortPending) {
    VGLEnd();
    exit(0);
  }
  while (VGLSwitchPending) {
    unsigned int offset;
    unsigned int len;
    int i;

    VGLSwitchPending = 0;
    if (VGLOnDisplay) {
      ioctl(0, KDENABIO, 0);
      ioctl(0, KDSETMODE, KD_GRAPHICS);
      ioctl(0, VGLMode, 0);
      VGLCurWindow = 0;
      VGLMem = (byte*)mmap(0, VGLAdpInfo.va_window_size, PROT_READ|PROT_WRITE,
			   MAP_FILE, 0, 0);

      /* XXX: what if mmap() has failed! */
      VGLDisplay->Type = VIDBUF8;	/* XXX */
      switch (VGLModeInfo.vi_mem_model) {
      case V_INFO_MM_PLANAR:
	if (VGLModeInfo.vi_depth == 4 && VGLModeInfo.vi_planes == 4) {
	  if (VGLBufSize/VGLModeInfo.vi_planes > VGLAdpInfo.va_window_size)
	    VGLDisplay->Type = VIDBUF4S;
	  else
	    VGLDisplay->Type = VIDBUF4;
	} else {
	  /* shouldn't be happening */
	}
        break;
      case V_INFO_MM_PACKED:
	if (VGLModeInfo.vi_depth == 8) {
	  if (VGLBufSize/VGLModeInfo.vi_planes > VGLAdpInfo.va_window_size)
	    VGLDisplay->Type = VIDBUF8S;
	  else
	    VGLDisplay->Type = VIDBUF8;
	}
        break;
      case V_INFO_MM_VGAX:
	VGLDisplay->Type = VIDBUF8X;
	break;
      case V_INFO_MM_DIRECT:
	switch (VGLModeInfo.vi_pixel_size) {
	  case 2:
	    if (VGLBufSize/VGLModeInfo.vi_planes > VGLAdpInfo.va_window_size)
	      VGLDisplay->Type = VIDBUF16S;
	    else
	      VGLDisplay->Type = VIDBUF16;
	    break;
	  case 3:
	    if (VGLBufSize/VGLModeInfo.vi_planes > VGLAdpInfo.va_window_size)
	      VGLDisplay->Type = VIDBUF24S;
	    else
	      VGLDisplay->Type = VIDBUF24;
	    break;
	  case 4:
	    if (VGLBufSize/VGLModeInfo.vi_planes > VGLAdpInfo.va_window_size)
	      VGLDisplay->Type = VIDBUF32S;
	    else
	      VGLDisplay->Type = VIDBUF32;
	    break;
	  default:
	  /* shouldn't be happening */
          break;
        }
      default:
	/* shouldn't be happening */
        break;
      }

      VGLDisplay->Bitmap = VGLMem;
      VGLDisplay->Xsize = VGLModeInfo.vi_width;
      VGLDisplay->Ysize = VGLModeInfo.vi_height;
      VGLSetVScreenSize(VGLDisplay, VGLDisplay->VXsize, VGLDisplay->VYsize);
      VGLPanScreen(VGLDisplay, VGLDisplay->Xorigin, VGLDisplay->Yorigin);
      switch (VGLDisplay->Type) {
      case VIDBUF4S:
	outb(0x3c6, 0xff);
	outb(0x3ce, 0x01); outb(0x3cf, 0x00);		/* set/reset enable */
	outb(0x3ce, 0x08); outb(0x3cf, 0xff);		/* bit mask */
	for (offset = 0; offset < VGLBufSize/VGLModeInfo.vi_planes;
	     offset += len) {
	  VGLSetSegment(offset);
	  len = min(VGLBufSize/VGLModeInfo.vi_planes - offset,
		    VGLAdpInfo.va_window_size);
	  for (i = 0; i < VGLModeInfo.vi_planes; i++) {
	    outb(0x3c4, 0x02);
	    outb(0x3c5, 0x01<<i);
	    bcopy(&VGLBuf[i*VGLBufSize/VGLModeInfo.vi_planes + offset],
		  VGLMem, len);
	  }
	}
	break;
      case VIDBUF4:
      case VIDBUF8X:
	outb(0x3c6, 0xff);
	outb(0x3ce, 0x01); outb(0x3cf, 0x00);		/* set/reset enable */
	outb(0x3ce, 0x08); outb(0x3cf, 0xff);		/* bit mask */
	for (i = 0; i < VGLModeInfo.vi_planes; i++) {
	  outb(0x3c4, 0x02);
	  outb(0x3c5, 0x01<<i);
	  bcopy(&VGLBuf[i*VGLAdpInfo.va_window_size], VGLMem,
		VGLAdpInfo.va_window_size);
	}
	break;
      case VIDBUF8:
      case VIDBUF8S:
      case VIDBUF16:
      case VIDBUF16S:
      case VIDBUF24:
      case VIDBUF24S:
      case VIDBUF32:
      case VIDBUF32S:
	for (offset = 0; offset < VGLBufSize; offset += len) {
	  VGLSetSegment(offset);
	  len = min(VGLBufSize - offset, VGLAdpInfo.va_window_size);
          bcopy(&VGLBuf[offset], VGLMem, len);
	}
	break;
      }
      VGLRestorePalette();
      ioctl(0, VT_RELDISP, VT_ACKACQ);
    }
    else {
      switch (VGLDisplay->Type) {
      case VIDBUF4S:
	for (offset = 0; offset < VGLBufSize/VGLModeInfo.vi_planes;
	     offset += len) {
	  VGLSetSegment(offset);
	  len = min(VGLBufSize/VGLModeInfo.vi_planes - offset,
		    VGLAdpInfo.va_window_size);
	  for (i = 0; i < VGLModeInfo.vi_planes; i++) {
	    outb(0x3ce, 0x04);
	    outb(0x3cf, i);
	    bcopy(VGLMem, &VGLBuf[i*VGLBufSize/VGLModeInfo.vi_planes + offset],
		  len);
	  }
	}
	break;
      case VIDBUF4:
      case VIDBUF8X:
	/*
	 * NOTE: the saved buffer is NOT in the MEMBUF format which 
	 * the ordinary memory bitmap object is stored in. XXX
	 */
	for (i = 0; i < VGLModeInfo.vi_planes; i++) {
	  outb(0x3ce, 0x04);
	  outb(0x3cf, i);
	  bcopy(VGLMem, &VGLBuf[i*VGLAdpInfo.va_window_size],
		VGLAdpInfo.va_window_size);
	}
	break;
      case VIDBUF8:
      case VIDBUF8S:
      case VIDBUF16:
      case VIDBUF16S:
      case VIDBUF24:
      case VIDBUF24S:
      case VIDBUF32:
      case VIDBUF32S:
	for (offset = 0; offset < VGLBufSize; offset += len) {
	  VGLSetSegment(offset);
	  len = min(VGLBufSize - offset, VGLAdpInfo.va_window_size);
          bcopy(VGLMem, &VGLBuf[offset], len);
	}
	break;
      }
      VGLMem = MAP_FAILED;
      munmap(VGLDisplay->Bitmap, VGLAdpInfo.va_window_size);
      ioctl(0, VGLOldMode, 0);
      ioctl(0, KDSETMODE, KD_TEXT);
      ioctl(0, KDDISABIO, 0);
      ioctl(0, VT_RELDISP, VT_TRUE);
      VGLDisplay->Bitmap = VGLBuf;
      VGLDisplay->Type = MEMBUF;
      VGLDisplay->Xsize = VGLDisplay->VXsize;
      VGLDisplay->Ysize = VGLDisplay->VYsize;
      while (!VGLOnDisplay) pause();
    }
  }
}

int
VGLSetSegment(unsigned int offset)
{
  if (offset/VGLAdpInfo.va_window_size != VGLCurWindow) {
    ioctl(0, CONS_SETWINORG, offset);		/* FBIO_SETWINORG */
    VGLCurWindow = offset/VGLAdpInfo.va_window_size;
  }
  return (offset%VGLAdpInfo.va_window_size);
}

int
VGLSetVScreenSize(VGLBitmap *object, int VXsize, int VYsize)
{
  if (VXsize < object->Xsize || VYsize < object->Ysize)
    return -1;
  if (object->Type == MEMBUF)
    return -1;
  if (ioctl(0, FBIO_SETLINEWIDTH, &VXsize))
    return -1;
  ioctl(0, CONS_ADPINFO, &VGLAdpInfo);	/* FBIO_ADPINFO */
  object->VXsize = VGLAdpInfo.va_line_width
			   *8/(VGLModeInfo.vi_depth/VGLModeInfo.vi_planes);
  object->VYsize = VGLBufSize/VGLModeInfo.vi_planes/VGLAdpInfo.va_line_width;
  if (VYsize < object->VYsize)
    object->VYsize = VYsize;

#ifdef LIBVGL_DEBUG
  fprintf(stderr, "new size: VGLXsize:%d, Ysize:%d, VXsize:%d, VYsize:%d\n",
	  object->Xsize, object->Ysize, object->VXsize, object->VYsize);
#endif

  return 0;
}

int
VGLPanScreen(VGLBitmap *object, int x, int y)
{
  video_display_start_t origin;

  if (x < 0 || x + object->Xsize > object->VXsize
      || y < 0 || y + object->Ysize > object->VYsize)
    return -1;
  if (object->Type == MEMBUF)
    return 0;
  origin.x = x;
  origin.y = y;
  if (ioctl(0, FBIO_SETDISPSTART, &origin))
    return -1;
  object->Xorigin = x;
  object->Yorigin = y;

#ifdef LIBVGL_DEBUG
  fprintf(stderr, "new origin: (%d, %d)\n", x, y);
#endif

  return 0;
}
OpenPOWER on IntegriCloud