VirtualBox

source: vbox/trunk/src/VBox/Additions/WINNT/Graphics/Display/vbva.c@ 30215

Last change on this file since 30215 was 28800, checked in by vboxsync, 15 years ago

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1/** @file
2 *
3 * VirtualBox Windows NT/2000/XP guest video driver
4 *
5 * VBVA dirty rectangles calculations.
6 *
7 * Copyright (C) 2006-2007 Oracle Corporation
8 *
9 * This file is part of VirtualBox Open Source Edition (OSE), as
10 * available from http://www.virtualbox.org. This file is free software;
11 * you can redistribute it and/or modify it under the terms of the GNU
12 * General Public License (GPL) as published by the Free Software
13 * Foundation, in version 2 as it comes in the "COPYING" file of the
14 * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15 * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16 */
17
18#include "driver.h"
19
20#ifdef VBOX_VBVA_ADJUST_RECT
21static ULONG vbvaConvertPixel ( /*from*/ BYTE *pu8PixelFrom, int cbPixelFrom,
22 /*to*/ int cbPixelTo)
23{
24 BYTE r, g, b;
25 ULONG ulConvertedPixel = 0;
26
27 switch (cbPixelFrom)
28 {
29 case 4:
30 {
31 switch (cbPixelTo)
32 {
33 case 3:
34 {
35 memcpy (&ulConvertedPixel, pu8PixelFrom, 3);
36 } break;
37
38 case 2:
39 {
40 ulConvertedPixel = *(ULONG *)pu8PixelFrom;
41
42 r = (BYTE)(ulConvertedPixel >> 16);
43 g = (BYTE)(ulConvertedPixel >> 8);
44 b = (BYTE)(ulConvertedPixel);
45
46 ulConvertedPixel = ((r >> 3) << 11) + ((g >> 2) << 5) + (b >> 3);
47 } break;
48 }
49 } break;
50
51 case 3:
52 {
53 switch (cbPixelTo)
54 {
55 case 2:
56 {
57 memcpy (&ulConvertedPixel, pu8PixelFrom, 3);
58
59 r = (BYTE)(ulConvertedPixel >> 16);
60 g = (BYTE)(ulConvertedPixel >> 8);
61 b = (BYTE)(ulConvertedPixel);
62
63 ulConvertedPixel = ((r >> 3) << 11) + ((g >> 2) << 5) + (b >> 3);
64 } break;
65 }
66 } break;
67 }
68
69 return ulConvertedPixel;
70}
71
72BOOL vbvaFindChangedRect (SURFOBJ *psoDest, SURFOBJ *psoSrc, RECTL *prclDest, POINTL *pptlSrc)
73{
74 int x, y;
75 int fTopNonEqualFound;
76 int yTopmost;
77 int yBottommost;
78 int cbPixelSrc;
79 int cbPixelDest;
80 RECTL rclDest;
81 RECTL rclSrc;
82 BYTE *pu8Src;
83 BYTE *pu8Dest;
84
85 if (!prclDest || !pptlSrc)
86 {
87 return TRUE;
88 }
89
90 DISPDBG((1, "vbvaFindChangedRect: dest %d,%d %dx%d from %d,%d\n",
91 prclDest->left, prclDest->top, prclDest->right - prclDest->left, prclDest->bottom - prclDest->top,
92 pptlSrc->x, pptlSrc->y
93 ));
94
95 switch (psoDest->iBitmapFormat)
96 {
97 case BMF_16BPP: cbPixelDest = 2; break;
98 case BMF_24BPP: cbPixelDest = 3; break;
99 case BMF_32BPP: cbPixelDest = 4; break;
100 default: cbPixelDest = 0;
101 }
102
103 switch (psoSrc->iBitmapFormat)
104 {
105 case BMF_16BPP: cbPixelSrc = 2; break;
106 case BMF_24BPP: cbPixelSrc = 3; break;
107 case BMF_32BPP: cbPixelSrc = 4; break;
108 default: cbPixelSrc = 0;
109 }
110
111 if (cbPixelDest == 0 || cbPixelSrc == 0)
112 {
113 DISPDBG((1, "vbvaFindChangedRect: unsupported pixel format src %d dst %d\n", psoDest->iBitmapFormat, psoSrc->iBitmapFormat));
114 return TRUE;
115 }
116
117 rclDest = *prclDest;
118
119 vrdpAdjustRect (psoDest, &rclDest);
120
121 pptlSrc->x += rclDest.left - prclDest->left;
122 pptlSrc->y += rclDest.top - prclDest->top;
123
124 *prclDest = rclDest;
125
126 if ( rclDest.right == rclDest.left
127 || rclDest.bottom == rclDest.top)
128 {
129 DISPDBG((1, "vbvaFindChangedRect: empty dest rect: %d-%d, %d-%d\n", rclDest.left, rclDest.right, rclDest.top, rclDest.bottom));
130 return FALSE;
131 }
132
133 rclSrc.left = pptlSrc->x;
134 rclSrc.top = pptlSrc->y;
135 rclSrc.right = pptlSrc->x + (rclDest.right - rclDest.left);
136 rclSrc.bottom = pptlSrc->y + (rclDest.bottom - rclDest.top);
137 vrdpAdjustRect (psoSrc, &rclSrc);
138
139 if ( rclSrc.right == rclSrc.left
140 || rclSrc.bottom == rclSrc.top)
141 {
142 prclDest->right = prclDest->left;
143 prclDest->bottom = prclDest->top;
144
145 DISPDBG((1, "vbvaFindChangedRect: empty src rect: %d-%d, %d-%d\n", rclSrc.left, rclSrc.right, rclSrc.top, rclSrc.bottom));
146 return FALSE;
147 }
148
149 VBVA_ASSERT(pptlSrc->x == rclSrc.left);
150 VBVA_ASSERT(pptlSrc->y == rclSrc.top);
151
152 /*
153 * Compare the content of the screen surface (psoDest) with the source surface (psoSrc).
154 * Update the prclDest with the rectangle that will be actually changed after
155 * copying the source bits to the screen.
156 */
157 pu8Src = (BYTE *)psoSrc->pvScan0 + psoSrc->lDelta * pptlSrc->y + cbPixelSrc * pptlSrc->x;
158 pu8Dest = (BYTE *)psoDest->pvScan0 + psoDest->lDelta * prclDest->top + cbPixelDest * prclDest->left;
159
160 /* Use the rclDest as the bounding rectangle for the changed area. */
161 rclDest.left = prclDest->right; /* +inf */
162 rclDest.right = prclDest->left; /* -inf */
163 rclDest.top = prclDest->bottom; /* +inf */
164 rclDest.bottom = prclDest->top; /* -inf */
165
166 fTopNonEqualFound = 0;
167 yTopmost = prclDest->top; /* inclusive */
168 yBottommost = prclDest->top - 1; /* inclusive */
169
170 for (y = prclDest->top; y < prclDest->bottom; y++)
171 {
172 int fLeftNonEqualFound = 0;
173
174 /* Init to an empty line. */
175 int xLeftmost = prclDest->left; /* inclusive */
176 int xRightmost = prclDest->left - 1; /* inclusive */
177
178 BYTE *pu8SrcLine = pu8Src;
179 BYTE *pu8DestLine = pu8Dest;
180
181 for (x = prclDest->left; x < prclDest->right; x++)
182 {
183 int fEqualPixels;
184
185 if (cbPixelSrc == cbPixelDest)
186 {
187 fEqualPixels = (memcmp (pu8SrcLine, pu8DestLine, cbPixelDest) == 0);
188 }
189 else
190 {
191 /* Convert larger pixel to the smaller pixel format. */
192 ULONG ulConvertedPixel;
193 if (cbPixelSrc > cbPixelDest)
194 {
195 /* Convert the source pixel to the destination pixel format. */
196 ulConvertedPixel = vbvaConvertPixel ( /*from*/ pu8SrcLine, cbPixelSrc,
197 /*to*/ cbPixelDest);
198 fEqualPixels = (memcmp (&ulConvertedPixel, pu8DestLine, cbPixelDest) == 0);
199 }
200 else
201 {
202 /* Convert the destination pixel to the source pixel format. */
203 ulConvertedPixel = vbvaConvertPixel ( /*from*/ pu8DestLine, cbPixelDest,
204 /*to*/ cbPixelSrc);
205 fEqualPixels = (memcmp (&ulConvertedPixel, pu8SrcLine, cbPixelSrc) == 0);
206 }
207 }
208
209 if (fEqualPixels)
210 {
211 /* Equal pixels. */
212 if (!fLeftNonEqualFound)
213 {
214 xLeftmost = x;
215 }
216 }
217 else
218 {
219 fLeftNonEqualFound = 1;
220 xRightmost = x;
221 }
222
223 pu8SrcLine += cbPixelSrc;
224 pu8DestLine += cbPixelDest;
225 }
226
227 /* min */
228 if (rclDest.left > xLeftmost)
229 {
230 rclDest.left = xLeftmost;
231 }
232
233 /* max */
234 if (rclDest.right < xRightmost)
235 {
236 rclDest.right = xRightmost;
237 }
238
239 if (xLeftmost > xRightmost) /* xRightmost is inclusive, so '>', not '>='. */
240 {
241 /* Empty line. */
242 if (!fTopNonEqualFound)
243 {
244 yTopmost = y;
245 }
246 }
247 else
248 {
249 fTopNonEqualFound = 1;
250 yBottommost = y;
251 }
252
253 pu8Src += psoSrc->lDelta;
254 pu8Dest += psoDest->lDelta;
255 }
256
257 /* min */
258 if (rclDest.top > yTopmost)
259 {
260 rclDest.top = yTopmost;
261 }
262
263 /* max */
264 if (rclDest.bottom < yBottommost)
265 {
266 rclDest.bottom = yBottommost;
267 }
268
269 /* rclDest was calculated with right-bottom inclusive.
270 * The following checks and the caller require exclusive coords.
271 */
272 rclDest.right++;
273 rclDest.bottom++;
274
275 DISPDBG((1, "vbvaFindChangedRect: new dest %d,%d %dx%d from %d,%d\n",
276 rclDest.left, rclDest.top, rclDest.right - rclDest.left, rclDest.bottom - rclDest.top,
277 pptlSrc->x, pptlSrc->y
278 ));
279
280 /* Update the rectangle with the changed area. */
281 if ( rclDest.left >= rclDest.right
282 || rclDest.top >= rclDest.bottom)
283 {
284 /* Empty rect. */
285 DISPDBG((1, "vbvaFindChangedRect: empty\n"));
286 prclDest->right = prclDest->left;
287 prclDest->bottom = prclDest->top;
288 return FALSE;
289 }
290
291 DISPDBG((1, "vbvaFindChangedRect: not empty\n"));
292
293 pptlSrc->x += rclDest.left - prclDest->left;
294 pptlSrc->y += rclDest.top - prclDest->top;
295
296 *prclDest = rclDest;
297
298 return TRUE;
299}
300#endif /* VBOX_VBVA_ADJUST_RECT */
301
302void vboxReportDirtyRect (PPDEV ppdev, RECTL *pRectOrig)
303{
304 if (ppdev)
305 {
306 VBVACMDHDR hdr;
307
308 RECTL rect = *pRectOrig;
309
310 if (rect.left < 0) rect.left = 0;
311 if (rect.top < 0) rect.top = 0;
312 if (rect.right > (int)ppdev->cxScreen) rect.right = ppdev->cxScreen;
313 if (rect.bottom > (int)ppdev->cyScreen) rect.bottom = ppdev->cyScreen;
314
315 hdr.x = (int16_t)rect.left;
316 hdr.y = (int16_t)rect.top;
317 hdr.w = (uint16_t)(rect.right - rect.left);
318 hdr.h = (uint16_t)(rect.bottom - rect.top);
319
320 hdr.x += (int16_t)ppdev->ptlDevOrg.x;
321 hdr.y += (int16_t)ppdev->ptlDevOrg.y;
322
323 vboxWrite (ppdev, &hdr, sizeof(hdr));
324 }
325
326 return;
327}
328
329void vbvaReportDirtyRect (PPDEV ppdev, RECTL *prcl)
330{
331 if (prcl)
332 {
333 DISPDBG((1, "DISP VBVA dirty rect: left %d, top: %d, width: %d, height: %d\n",
334 prcl->left, prcl->top, prcl->right - prcl->left, prcl->bottom - prcl->top));
335
336 vboxReportDirtyRect(ppdev, prcl);
337 }
338}
339
340void vbvaReportDirtyPath (PPDEV ppdev, PATHOBJ *ppo)
341{
342 RECTFX rcfxBounds;
343 RECTL rclBounds;
344
345 PATHOBJ_vGetBounds(ppo, &rcfxBounds);
346
347 rclBounds.left = FXTOLFLOOR(rcfxBounds.xLeft);
348 rclBounds.right = FXTOLCEILING(rcfxBounds.xRight);
349 rclBounds.top = FXTOLFLOOR(rcfxBounds.yTop);
350 rclBounds.bottom = FXTOLCEILING(rcfxBounds.yBottom);
351
352 vbvaReportDirtyRect (ppdev, &rclBounds);
353}
354
355__inline void vbvaReportDirtyClip (PPDEV ppdev, CLIPOBJ *pco, RECTL *prcl)
356{
357 if (prcl)
358 {
359 vbvaReportDirtyRect (ppdev, prcl);
360 }
361 else if (pco)
362 {
363 vbvaReportDirtyRect (ppdev, &pco->rclBounds);
364 }
365}
366
367
368void vbvaBitBlt (
369 SURFOBJ *psoTrg,
370 SURFOBJ *psoSrc,
371 SURFOBJ *psoMask,
372 CLIPOBJ *pco,
373 XLATEOBJ *pxlo,
374 RECTL *prclTrg,
375 POINTL *pptlSrc,
376 POINTL *pptlMask,
377 BRUSHOBJ *pbo,
378 POINTL *pptlBrush,
379 ROP4 rop4)
380{
381 PPDEV ppdev = (PPDEV)psoTrg->dhpdev;
382
383 vbvaReportDirtyClip (ppdev, pco, prclTrg);
384}
385
386void vbvaTextOut(
387 SURFOBJ *pso,
388 STROBJ *pstro,
389 FONTOBJ *pfo,
390 CLIPOBJ *pco,
391 RECTL *prclExtra, // Obsolete, always NULL
392 RECTL *prclOpaque,
393 BRUSHOBJ *pboFore,
394 BRUSHOBJ *pboOpaque,
395 POINTL *pptlOrg,
396 MIX mix
397 )
398{
399 PPDEV ppdev = (PPDEV)pso->dhpdev;
400
401 vbvaReportDirtyClip (ppdev, pco, prclOpaque? prclOpaque: &pstro->rclBkGround);
402}
403
404void vbvaLineTo(
405 SURFOBJ *pso,
406 CLIPOBJ *pco,
407 BRUSHOBJ *pbo,
408 LONG x1,
409 LONG y1,
410 LONG x2,
411 LONG y2,
412 RECTL *prclBounds,
413 MIX mix
414 )
415{
416 PPDEV ppdev = (PPDEV)pso->dhpdev;
417
418 vbvaReportDirtyClip (ppdev, pco, prclBounds);
419}
420
421void vbvaStretchBlt(
422 SURFOBJ *psoDest,
423 SURFOBJ *psoSrc,
424 SURFOBJ *psoMask,
425 CLIPOBJ *pco,
426 XLATEOBJ *pxlo,
427 COLORADJUSTMENT *pca,
428 POINTL *pptlHTOrg,
429 RECTL *prclDest,
430 RECTL *prclSrc,
431 POINTL *pptlMask,
432 ULONG iMode
433 )
434{
435 PPDEV ppdev = (PPDEV)psoDest->dhpdev;
436
437 vbvaReportDirtyClip (ppdev, pco, prclDest);
438}
439
440void vbvaCopyBits(
441 SURFOBJ *psoDest,
442 SURFOBJ *psoSrc,
443 CLIPOBJ *pco,
444 XLATEOBJ *pxlo,
445 RECTL *prclDest,
446 POINTL *pptlSrc
447 )
448{
449 PPDEV ppdev = (PPDEV)psoDest->dhpdev;
450
451 vbvaReportDirtyClip (ppdev, pco, prclDest);
452}
453
454void vbvaPaint(
455 SURFOBJ *pso,
456 CLIPOBJ *pco,
457 BRUSHOBJ *pbo,
458 POINTL *pptlBrushOrg,
459 MIX mix
460 )
461{
462 PPDEV ppdev = (PPDEV)pso->dhpdev;
463
464 vbvaReportDirtyClip (ppdev, pco, NULL);
465}
466
467void vbvaFillPath(
468 SURFOBJ *pso,
469 PATHOBJ *ppo,
470 CLIPOBJ *pco,
471 BRUSHOBJ *pbo,
472 POINTL *pptlBrushOrg,
473 MIX mix,
474 FLONG flOptions
475 )
476{
477 PPDEV ppdev = (PPDEV)pso->dhpdev;
478
479 vbvaReportDirtyPath (ppdev, ppo);
480}
481
482void vbvaStrokePath(
483 SURFOBJ *pso,
484 PATHOBJ *ppo,
485 CLIPOBJ *pco,
486 XFORMOBJ *pxo,
487 BRUSHOBJ *pbo,
488 POINTL *pptlBrushOrg,
489 LINEATTRS *plineattrs,
490 MIX mix
491 )
492{
493 PPDEV ppdev = (PPDEV)pso->dhpdev;
494
495 vbvaReportDirtyPath (ppdev, ppo);
496}
497
498void vbvaStrokeAndFillPath(
499 SURFOBJ *pso,
500 PATHOBJ *ppo,
501 CLIPOBJ *pco,
502 XFORMOBJ *pxo,
503 BRUSHOBJ *pboStroke,
504 LINEATTRS *plineattrs,
505 BRUSHOBJ *pboFill,
506 POINTL *pptlBrushOrg,
507 MIX mixFill,
508 FLONG flOptions
509 )
510{
511 PPDEV ppdev = (PPDEV)pso->dhpdev;
512
513 vbvaReportDirtyPath (ppdev, ppo);
514}
515
516void vbvaSaveScreenBits(
517 SURFOBJ *pso,
518 ULONG iMode,
519 ULONG_PTR ident,
520 RECTL *prcl
521 )
522{
523 PPDEV ppdev = (PPDEV)pso->dhpdev;
524
525 VBVA_ASSERT(iMode == SS_RESTORE || iMode == SS_SAVE);
526
527 vbvaReportDirtyRect (ppdev, prcl);
528}
529
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