vboxutils_68.c@ 31890

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1	/** @file
2	* Linux Additions X11 graphics driver helper module
3	*/
4
5	/*
6	* Copyright (C) 2006-2007 Oracle Corporation
7	*
8	* This file is part of VirtualBox Open Source Edition (OSE), as
9	* available from http://www.virtualbox.org. This file is free software;
10	* you can redistribute it and/or modify it under the terms of the GNU
11	* General Public License (GPL) as published by the Free Software
12	* Foundation, in version 2 as it comes in the "COPYING" file of the
13	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
14	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
15	*/
16
17	#include <VBox/VBoxGuest.h>
18	#include <VBox/VBoxGuestLib.h>
19
20	#include <xf86Pci.h>
21	#include <Pci.h>
22
23	#include "xf86.h"
24	#define NEED_XF86_TYPES
25	#include "xf86_ansic.h"
26	#include "compiler.h"
27	#include "cursorstr.h"
28
29	#include "vboxvideo_68.h"
30
31	#define VBOX_MAX_CURSOR_WIDTH 64
32	#define VBOX_MAX_CURSOR_HEIGHT 64
33
34	#if 0
35	#define DEBUG_X
36	#endif
37	#ifdef DEBUG_X
38	#define TRACE_ENTRY() do \
39	{ \
40	ErrorF ("%s\n", __FUNCTION__); \
41	} while(0)
42	#define TRACE_LINE() do \
43	{ \
44	ErrorF ("%s: line %d\n", __FUNCTION__, __LINE__); \
45	} while(0)
46	#define PUT_PIXEL(c) ErrorF ("%c", c)
47	#define dolog(...) ErrorF (__VA_ARGS__)
48	#else
49	#define PUT_PIXEL(c) do { } while(0)
50	#define TRACE_ENTRY() do { } while(0)
51	#define TRACE_LINE() do { } while(0)
52	#define dolog(...) do { } while(0)
53	#endif
54
55	/** Macro to printf an error message and return from a function */
56	#define RETERROR(scrnIndex, RetVal, ...) \
57	do \
58	{ \
59	xf86DrvMsg(scrnIndex, X_ERROR, __VA_ARGS__); \
60	return RetVal; \
61	} \
62	while (0)
63
64	#ifdef DEBUG_X
65	static void vbox_show_shape (unsigned short w, unsigned short h,
66	CARD32 bg, unsigned char *image)
67	{
68	size_t x, y;
69	unsigned short pitch;
70	CARD32 *color;
71	unsigned char *mask;
72	size_t size_mask;
73
74	image += offsetof (VMMDevReqMousePointer, pointerData);
75	mask = image;
76	pitch = (w + 7) / 8;
77	size_mask = (pitch * h + 3) & ~3;
78	color = (CARD32 *) (image + size_mask);
79
80	TRACE_ENTRY ();
81	for (y = 0; y < h; ++y, mask += pitch, color += w)
82	{
83	for (x = 0; x < w; ++x)
84	{
85	if (mask[x / 8] & (1 << (7 - (x % 8))))
86	ErrorF (" ");
87
88	else
89	{
90	CARD32 c = color[x];
91	if (c == bg)
92	ErrorF ("Y");
93	else
94	ErrorF ("X");
95	}
96	}
97	ErrorF ("\n");
98	}
99	}
100	#endif
101
102	static Bool vbox_vmmcall (ScrnInfoPtr pScrn, VBOXPtr pVBox,
103	VMMDevRequestHeader *hdrp)
104	{
105	int err;
106
107	TRACE_ENTRY ();
108	#ifdef RT_OS_LINUX
109	err = ioctl (pVBox->vbox_fd, VBOXGUEST_IOCTL_VMMREQUEST(hdrp->size), hdrp);
110	#else
111	/**
112	* @todo this should work fine on other platforms too, but it needs to be
113	* checked for each one.
114	*/
115	# error port me!
116	#endif
117	if (err < 0)
118	RETERROR(pScrn->scrnIndex, FALSE,
119	"Ioctl call failed during a request to the virtual machine: %s\n",
120	strerror (errno));
121	else
122	if (RT_FAILURE (hdrp->rc))
123	RETERROR(pScrn->scrnIndex, FALSE,
124	"A request to the virtual machine returned %d\n",
125	hdrp->rc);
126
127	/* success */
128	return TRUE;
129	}
130
131	static Bool
132	vbox_host_uses_hwcursor(ScrnInfoPtr pScrn)
133	{
134	Bool rc = FALSE;
135	VBOXPtr pVBox = pScrn->driverPrivate;
136	VMMDevReqMouseStatus req;
137
138	/* We may want to force the use of a software cursor. Currently this is
139	* needed if the guest uses a large virtual resolution, as in this case
140	* the host and guest tend to disagree about the pointer location. */
141	if (pVBox->forceSWCursor)
142	rc = FALSE;
143	else
144	{
145	int vrc = vmmdevInitRequest ((VMMDevRequestHeader*)&req, VMMDevReq_GetMouseStatus);
146	if (RT_FAILURE (vrc))
147	xf86DrvMsg(pScrn->scrnIndex, X_ERROR,
148	"Unable to determine whether the virtual machine supports mouse pointer integration - request initialization failed with return code %d\n", rc);
149	#ifdef RT_OS_LINUX
150	if ( RT_SUCCESS(vrc)
151	&& (ioctl(pVBox->vbox_fd, VBOXGUEST_IOCTL_VMMREQUEST(sizeof(req)), (void*)&req) < 0))
152	#else
153	# error port me!
154	#endif
155	{
156	vrc = VERR_FILE_IO_ERROR;
157	xf86DrvMsg(pScrn->scrnIndex, X_ERROR,
158	"Unable to determine whether the virtual machine supports mouse pointer integration - request system call failed: %s.\n",
159	strerror(errno));
160	}
161	if ( RT_SUCCESS(rc)
162	&& !(req.mouseFeatures & VMMDEV_MOUSE_HOST_CANNOT_HWPOINTER)
163	&& (req.mouseFeatures & VMMDEV_MOUSE_GUEST_CAN_ABSOLUTE))
164	rc = TRUE;
165	}
166	return rc;
167	}
168
169
170	void
171	vbox_close(ScrnInfoPtr pScrn, VBOXPtr pVBox)
172	{
173	TRACE_ENTRY ();
174
175	xfree (pVBox->reqp);
176	pVBox->reqp = NULL;
177
178	#ifdef RT_OS_SOLARIS
179	VbglR3Term();
180	#else
181	if (close (pVBox->vbox_fd))
182	xf86DrvMsg(pScrn->scrnIndex, X_ERROR,
183	"Unable to close the virtual machine device (file %d): %s\n",
184	pVBox->vbox_fd, strerror (errno));
185	pVBox->vbox_fd = -1;
186	#endif
187	}
188
189	/**
190	* Macro to disable VBVA extensions and return, for use when an
191	* unexplained error occurs.
192	*/
193	#define DISABLE_VBVA_AND_RETURN(pScrn, ...) \
194	do \
195	{ \
196	xf86DrvMsg(pScrn->scrnIndex, X_ERROR, __VA_ARGS__); \
197	vboxDisableVbva(pScrn); \
198	pVBox->useVbva = FALSE; \
199	return; \
200	} \
201	while (0)
202
203	/**
204	* Callback function called by the X server to tell us about dirty
205	* rectangles in the video buffer.
206	*
207	* @param pScreen pointer to the information structure for the current
208	* screen
209	* @param iRects Number of dirty rectangles to update
210	* @param aRects Array of structures containing the coordinates of the
211	* rectangles
212	*/
213	static void
214	vboxHandleDirtyRect(ScrnInfoPtr pScrn, int iRects, BoxPtr aRects)
215	{
216	VBVACMDHDR cmdHdr;
217	VBOXPtr pVBox;
218	VBVARECORD *pRecord;
219	VBVAMEMORY *pMem;
220	CARD32 indexRecordNext;
221	CARD32 off32Data;
222	CARD32 off32Free;
223	INT32 i32Diff;
224	CARD32 cbHwBufferAvail;
225	int scrnIndex;
226	int i;
227
228	pVBox = pScrn->driverPrivate;
229	if (pVBox->useVbva == FALSE)
230	return;
231	pMem = pVBox->pVbvaMemory;
232	/* Just return quietly if VBVA is not currently active. */
233	if ((pMem->fu32ModeFlags & VBVA_F_MODE_ENABLED) == 0)
234	return;
235	scrnIndex = pScrn->scrnIndex;
236
237	for (i = 0; i < iRects; i++)
238	{
239	cmdHdr.x = (int16_t)aRects[i].x1 - pVBox->viewportX;
240	cmdHdr.y = (int16_t)aRects[i].y1 - pVBox->viewportY;
241	cmdHdr.w = (uint16_t)(aRects[i].x2 - aRects[i].x1);
242	cmdHdr.h = (uint16_t)(aRects[i].y2 - aRects[i].y1);
243
244	/* Get the active record and move the pointer along */
245	indexRecordNext = (pMem->indexRecordFree + 1)
246	% VBVA_MAX_RECORDS;
247	if (indexRecordNext == pMem->indexRecordFirst)
248	{
249	/* All slots in the records queue are used. */
250	if (vbox_vmmcall(pScrn, pVBox,
251	(VMMDevRequestHeader *) pVBox->reqf) != TRUE)
252	DISABLE_VBVA_AND_RETURN(pScrn,
253	"Unable to clear the VirtualBox graphics acceleration queue "
254	"- the request to the virtual machine failed. Switching to "
255	"unaccelerated mode.\n");
256	}
257	if (indexRecordNext == pMem->indexRecordFirst)
258	DISABLE_VBVA_AND_RETURN(pScrn,
259	"Failed to clear the VirtualBox graphics acceleration queue. "
260	"Switching to unaccelerated mode.\n");
261	pRecord = &pMem->aRecords[pMem->indexRecordFree];
262	/* Mark the record as being updated. */
263	pRecord->cbRecord = VBVA_F_RECORD_PARTIAL;
264	pMem->indexRecordFree = indexRecordNext;
265	/* Compute how many bytes we have in the ring buffer. */
266	off32Free = pMem->off32Free;
267	off32Data = pMem->off32Data;
268	/* Free is writing position. Data is reading position.
269	* Data == Free means buffer is free.
270	* There must be always gap between free and data when data
271	* are in the buffer.
272	* Guest only changes free, host only changes data.
273	*/
274	i32Diff = off32Data - off32Free;
275	cbHwBufferAvail = i32Diff > 0? i32Diff: VBVA_RING_BUFFER_SIZE
276	+ i32Diff;
277	if (cbHwBufferAvail <= VBVA_RING_BUFFER_THRESHOLD)
278	{
279	if (vbox_vmmcall(pScrn, pVBox,
280	(VMMDevRequestHeader *) pVBox->reqf) != TRUE)
281	DISABLE_VBVA_AND_RETURN(pScrn,
282	"Unable to clear the VirtualBox graphics acceleration queue "
283	"- the request to the virtual machine failed. Switching to "
284	"unaccelerated mode.\n");
285	/* Calculate the free space again. */
286	off32Free = pMem->off32Free;
287	off32Data = pMem->off32Data;
288	i32Diff = off32Data - off32Free;
289	cbHwBufferAvail = i32Diff > 0? i32Diff:
290	VBVA_RING_BUFFER_SIZE + i32Diff;
291	if (cbHwBufferAvail <= VBVA_RING_BUFFER_THRESHOLD)
292	DISABLE_VBVA_AND_RETURN(pScrn,
293	"No space left in the VirtualBox graphics acceleration command buffer, "
294	"despite clearing the queue. Switching to unaccelerated mode.\n");
295	}
296	/* Now copy the data into the buffer */
297	if (off32Free + sizeof(cmdHdr) < VBVA_RING_BUFFER_SIZE)
298	{
299	memcpy(&pMem->au8RingBuffer[off32Free], &cmdHdr,
300	sizeof(cmdHdr));
301	pMem->off32Free = pMem->off32Free + sizeof(cmdHdr);
302	}
303	else
304	{
305	CARD32 u32First = VBVA_RING_BUFFER_SIZE - off32Free;
306	/* The following is impressively ugly! */
307	CARD8 pu8Second = (CARD8 )&cmdHdr + u32First;
308	CARD32 u32Second = sizeof(cmdHdr) - u32First;
309	memcpy(&pMem->au8RingBuffer[off32Free], &cmdHdr, u32First);
310	if (u32Second)
311	memcpy(&pMem->au8RingBuffer[0], (void *)pu8Second, u32Second);
312	pMem->off32Free = u32Second;
313	}
314	pRecord->cbRecord += sizeof(cmdHdr);
315	/* Mark the record completed. */
316	pRecord->cbRecord &= ~VBVA_F_RECORD_PARTIAL;
317	}
318	}
319
320
321	/**
322	* Initialise VirtualBox's accelerated video extensions.
323	* Note that we assume that the PCI memory is 32bit mapped,
324	* as X doesn't seem to support mapping 64bit memory.
325	*
326	* @returns True on success, false on failure
327	*/
328	static Bool
329	vboxInitVbva(int scrnIndex, ScreenPtr pScreen, VBOXPtr pVBox)
330	{
331	PCITAG pciTagDev;
332	ADDRESS pciAddrDev;
333	int rc;
334
335	/* Locate the device. It should already have been enabled by
336	the kernel driver. */
337	pciTagDev = pciFindFirst((unsigned) VMMDEV_DEVICEID << 16 \| VMMDEV_VENDORID,
338	(CARD32) ~0);
339	if (pciTagDev == PCI_NOT_FOUND)
340	{
341	xf86DrvMsg(scrnIndex, X_ERROR,
342	"Could not find the VirtualBox base device on the PCI bus.\n");
343	return FALSE;
344	}
345	/* Read the address and size of the second I/O region. */
346	pciAddrDev = pciReadLong(pciTagDev, PCI_MAP_REG_START + 4);
347	if (pciAddrDev == 0 \|\| pciAddrDev == (CARD32) ~0)
348	RETERROR(scrnIndex, FALSE,
349	"The VirtualBox base device contains an invalid memory address.\n");
350	if (PCI_MAP_IS64BITMEM(pciAddrDev))
351	RETERROR(scrnIndex, FALSE,
352	"The VirtualBox base device has a 64bit mapping address. "
353	"This is currently not supported.\n");
354	/* Map it. We hardcode the size as X does not export the
355	function needed to determine it. */
356	pVBox->pVMMDevMemory = xf86MapPciMem(scrnIndex, 0, pciTagDev, pciAddrDev,
357	sizeof(VMMDevMemory));
358	if (pVBox->pVMMDevMemory == NULL)
359	{
360	xf86DrvMsg(scrnIndex, X_ERROR,
361	"Failed to map VirtualBox video extension memory.\n");
362	return FALSE;
363	}
364	pVBox->pVbvaMemory = &pVBox->pVMMDevMemory->vbvaMemory;
365	/* Initialise requests */
366	pVBox->reqf = xcalloc(1, vmmdevGetRequestSize(VMMDevReq_VideoAccelFlush));
367	if (!pVBox->reqf)
368	{
369	xf86DrvMsg(scrnIndex, X_ERROR,
370	"Could not allocate memory for VBVA flush request.\n");
371	return FALSE;
372	}
373	rc = vmmdevInitRequest ((VMMDevRequestHeader *) pVBox->reqf,
374	VMMDevReq_VideoAccelFlush);
375	if (RT_FAILURE (rc))
376	{
377	xf86DrvMsg(scrnIndex, X_ERROR,
378	"Could not initialise VBVA flush request: return value %d\n", rc);
379	xfree(pVBox->reqf);
380	return FALSE;
381	}
382	pVBox->reqe = xcalloc(1, vmmdevGetRequestSize(VMMDevReq_VideoAccelEnable));
383	if (!pVBox->reqe)
384	{
385	xf86DrvMsg(scrnIndex, X_ERROR,
386	"Could not allocate memory for VBVA enable request.\n");
387	xfree(pVBox->reqf);
388	return FALSE;
389	}
390	rc = vmmdevInitRequest ((VMMDevRequestHeader *) pVBox->reqe,
391	VMMDevReq_VideoAccelEnable);
392	if (RT_FAILURE (rc))
393	{
394	xf86DrvMsg(scrnIndex, X_ERROR,
395	"Could not initialise VBVA enable request: return value = %d\n",
396	rc);
397	xfree(pVBox->reqf);
398	xfree(pVBox->reqe);
399	return FALSE;
400	}
401	/* Set up the dirty rectangle handler. Since this seems to be a
402	delicate operation, and removing it doubly so, this will
403	remain in place whether it is needed or not, and will simply
404	return if VBVA is not active. I assume that it will be active
405	most of the time. */
406	if (ShadowFBInit2(pScreen, NULL, vboxHandleDirtyRect) != TRUE)
407	{
408	xf86DrvMsg(scrnIndex, X_ERROR,
409	"Unable to install dirty rectangle handler for VirtualBox graphics acceleration.\n");
410	xfree(pVBox->reqf);
411	xfree(pVBox->reqe);
412	return FALSE;
413	}
414	return TRUE;
415	}
416
417	Bool
418	vbox_open (ScrnInfoPtr pScrn, ScreenPtr pScreen, VBOXPtr pVBox)
419	{
420	int fd, vrc;
421	void *p = NULL;
422	size_t size;
423	int scrnIndex = pScrn->scrnIndex;
424	Bool rc = TRUE;
425
426	TRACE_ENTRY ();
427
428	pVBox->useVbva = FALSE;
429
430	#ifdef RT_OS_SOLARIS
431	NOREF(fd);
432	if (pVBox->reqp)
433	{
434	/* still open, just re-enable VBVA after CloseScreen was called */
435	pVBox->useVbva = vboxInitVbva(scrnIndex, pScreen, pVBox);
436	return TRUE;
437	}
438
439	vrc = VbglR3Init();
440	if (RT_FAILURE(vrc))
441	{
442	xf86DrvMsg(scrnIndex, X_ERROR, "VbglR3Init failed vrc=%d.\n", vrc);
443	rc = FALSE;
444	}
445	#else
446	if (pVBox->vbox_fd != -1 && pVBox->reqp)
447	{
448	/* still open, just re-enable VBVA after CloseScreen was called */
449	pVBox->useVbva = vboxInitVbva(scrnIndex, pScreen, pVBox);
450	return TRUE;
451	}
452
453	fd = open (VBOXGUEST_DEVICE_NAME, O_RDWR, 0);
454	if (fd < 0)
455	{
456	xf86DrvMsg(scrnIndex, X_ERROR,
457	"Error opening kernel module: %s\n",
458	strerror (errno));
459	rc = FALSE;
460	}
461	#endif
462
463	if (rc) {
464	size = vmmdevGetRequestSize (VMMDevReq_SetPointerShape);
465
466	p = xcalloc (1, size);
467	if (NULL == p) {
468	xf86DrvMsg(scrnIndex, X_ERROR,
469	"Could not allocate %lu bytes for VMM request\n",
470	(unsigned long) size);
471	rc = FALSE;
472	}
473	}
474	if (rc) {
475	vrc = vmmdevInitRequest (p, VMMDevReq_SetPointerShape);
476	if (RT_FAILURE (vrc))
477	{
478	xf86DrvMsg(scrnIndex, X_ERROR,
479	"Could not init VMM request: vrc = %d\n", vrc);
480	rc = FALSE;
481	}
482	}
483	if (rc) {
484	#ifndef RT_OS_SOLARIS
485	pVBox->vbox_fd = fd;
486	#endif
487	pVBox->reqp = p;
488	pVBox->pCurs = NULL;
489	pVBox->pointerHeaderSize = size;
490	pVBox->useVbva = vboxInitVbva(scrnIndex, pScreen, pVBox);
491	} else {
492	if (NULL != p) {
493	xfree (p);
494	}
495	#ifdef RT_OS_SOLARIS
496	VbglR3Term();
497	#else
498	if (close (fd)) {
499	xf86DrvMsg(scrnIndex, X_ERROR,
500	"Error closing kernel module file descriptor(%d): %s\n",
501	fd, strerror (errno));
502	}
503	#endif
504	}
505	return rc;
506	}
507
508	static void vbox_vmm_hide_cursor (ScrnInfoPtr pScrn, VBOXPtr pVBox)
509	{
510	pVBox->reqp->fFlags = 0;
511	if (vbox_vmmcall (pScrn, pVBox, &pVBox->reqp->header) != TRUE)
512	xf86DrvMsg(pScrn->scrnIndex, X_ERROR,
513	"Could not hide the virtual mouse pointer.\n");
514	}
515
516	static void vbox_vmm_show_cursor (ScrnInfoPtr pScrn, VBOXPtr pVBox)
517	{
518	pVBox->reqp->fFlags = VBOX_MOUSE_POINTER_VISIBLE;
519	if (vbox_vmmcall (pScrn, pVBox, &pVBox->reqp->header) != TRUE)
520	xf86DrvMsg(pScrn->scrnIndex, X_ERROR,
521	"Could not unhide the virtual mouse pointer.\n");
522	}
523
524	static void vbox_vmm_load_cursor_image (ScrnInfoPtr pScrn, VBOXPtr pVBox,
525	unsigned char *image)
526	{
527	VMMDevReqMousePointer *reqp;
528	reqp = (VMMDevReqMousePointer *) image;
529
530	dolog ("w=%d h=%d size=%d\n",
531	reqp->width,
532	reqp->height,
533	reqp->header.size);
534
535	#ifdef DEBUG_X
536	vbox_show_shape (reqp->width, reqp->height, 0, image);
537	#endif
538
539	if (vbox_vmmcall (pScrn, pVBox, &reqp->header) != TRUE)
540	xf86DrvMsg(pScrn->scrnIndex, X_ERROR,
541	"Unable to set the virtual mouse pointer image.\n");
542	}
543
544	static void vbox_set_cursor_colors (ScrnInfoPtr pScrn, int bg, int fg)
545	{
546	TRACE_ENTRY ();
547
548	(void) pScrn;
549	(void) bg;
550	(void) fg;
551	/* ErrorF ("vbox_set_cursor_colors NOT IMPLEMENTED\n"); */
552	}
553
554	static void
555	vbox_set_cursor_position (ScrnInfoPtr pScrn, int x, int y)
556	{
557	(void) pScrn; (void) x; (void) y;
558	}
559
560	static void vbox_hide_cursor (ScrnInfoPtr pScrn)
561	{
562	VBOXPtr pVBox = pScrn->driverPrivate;
563
564	TRACE_ENTRY ();
565
566	vbox_vmm_hide_cursor (pScrn, pVBox);
567	}
568
569	static void vbox_show_cursor (ScrnInfoPtr pScrn)
570	{
571	VBOXPtr pVBox = pScrn->driverPrivate;
572
573	TRACE_ENTRY ();
574
575	vbox_vmm_show_cursor (pScrn, pVBox);
576	}
577
578	static void vbox_load_cursor_image (ScrnInfoPtr pScrn, unsigned char *image)
579	{
580	VBOXPtr pVBox = pScrn->driverPrivate;
581
582	TRACE_ENTRY ();
583
584	vbox_vmm_load_cursor_image (pScrn, pVBox, image);
585	}
586
587	static Bool
588	vbox_use_hw_cursor (ScreenPtr pScreen, CursorPtr pCurs)
589	{
590	ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
591	return vbox_host_uses_hwcursor(pScrn);
592	}
593
594	static unsigned char color_to_byte (unsigned c)
595	{
596	return (c >> 8) & 0xff;
597	}
598
599	static unsigned char *
600	vbox_realize_cursor(xf86CursorInfoPtr infoPtr, CursorPtr pCurs)
601	{
602	VBOXPtr pVBox;
603	CursorBitsPtr bitsp;
604	unsigned short w, h, x, y;
605	unsigned char c, p, pm, ps, *m;
606	size_t size, size_rgba, size_mask, src_pitch, dst_pitch;
607	CARD32 fc, bc, *cp;
608	int rc, scrnIndex = infoPtr->pScrn->scrnIndex;
609	VMMDevReqMousePointer *reqp;
610
611	pVBox = infoPtr->pScrn->driverPrivate;
612	bitsp = pCurs->bits;
613	w = bitsp->width;
614	h = bitsp->height;
615
616	if (!w \|\| !h \|\| w > VBOX_MAX_CURSOR_WIDTH \|\| h > VBOX_MAX_CURSOR_HEIGHT)
617	RETERROR(scrnIndex, NULL,
618	"Error invalid cursor dimensions %dx%d\n", w, h);
619
620	if ((bitsp->xhot > w) \|\| (bitsp->yhot > h))
621	RETERROR(scrnIndex, NULL,
622	"Error invalid cursor hotspot location %dx%d (max %dx%d)\n",
623	bitsp->xhot, bitsp->yhot, w, h);
624
625	src_pitch = PixmapBytePad (bitsp->width, 1);
626	dst_pitch = (w + 7) / 8;
627	size_mask = ((dst_pitch * h) + 3) & (size_t) ~3;
628	size_rgba = w * h * 4;
629	size = size_mask + size_rgba + pVBox->pointerHeaderSize;
630
631	p = c = xcalloc (1, size);
632	if (!c)
633	RETERROR(scrnIndex, NULL,
634	"Error failed to alloc %lu bytes for cursor\n",
635	(unsigned long) size);
636
637	rc = vmmdevInitRequest ((VMMDevRequestHeader *) p,
638	VMMDevReq_SetPointerShape);
639	if (RT_FAILURE (rc)) {
640	xfree(p);
641	RETERROR(scrnIndex, NULL,
642	"Could not init VMM request: rc = %d\n", rc);
643	}
644
645	m = p + offsetof (VMMDevReqMousePointer, pointerData);
646	cp = (CARD32 *) (m + size_mask);
647
648	dolog ("w=%d h=%d sm=%d sr=%d p=%d\n",
649	w, h, (int) size_mask, (int) size_rgba, (int) dst_pitch);
650	dolog ("m=%p c=%p cp=%p\n", m, c, (void ) (void )cp);
651
652	fc = color_to_byte (pCurs->foreBlue)
653	\| (color_to_byte (pCurs->foreGreen) << 8)
654	\| (color_to_byte (pCurs->foreRed) << 16);
655
656	bc = color_to_byte (pCurs->backBlue)
657	\| (color_to_byte (pCurs->backGreen) << 8)
658	\| (color_to_byte (pCurs->backRed) << 16);
659
660	/*
661	* Convert the Xorg source/mask bits to the and/xor bits VBox needs.
662	* Xorg:
663	* The mask is a bitmap indicating which parts of the cursor are
664	* transparent and which parts are drawn. The source is a bitmap
665	* indicating which parts of the non-transparent portion of the
666	* the cursor should be painted in the foreground color and which
667	* should be painted in the background color. By default, set bits
668	* indicate the opaque part of the mask bitmap and clear bits
669	* indicate the transparent part.
670	* VBox:
671	* The color data is the XOR mask. The AND mask bits determine
672	* which pixels of the color data (XOR mask) will replace (overwrite)
673	* the screen pixels (AND mask bit = 0) and which ones will be XORed
674	* with existing screen pixels (AND mask bit = 1).
675	* For example when you have the AND mask all 0, then you see the
676	* correct mouse pointer image surrounded by black square.
677	*/
678	for (pm = bitsp->mask, ps = bitsp->source, y = 0;
679	y < h;
680	++y, pm += src_pitch, ps += src_pitch, m += dst_pitch)
681	{
682	for (x = 0; x < w; ++x)
683	{
684	if (pm[x / 8] & (1 << (x % 8)))
685	{
686	/* opaque, leave AND mask bit at 0 */
687	if (ps[x / 8] & (1 << (x % 8)))
688	{
689	*cp++ = fc;
690	PUT_PIXEL ('X');
691	}
692	else
693	{
694	*cp++ = bc;
695	PUT_PIXEL ('*');
696	}
697	}
698	else
699	{
700	/* transparent, set AND mask bit */
701	m[x / 8] \|= 1 << (7 - (x % 8));
702	/* don't change the screen pixel */
703	*cp++ = 0;
704	PUT_PIXEL (' ');
705	}
706	}
707	PUT_PIXEL ('\n');
708	}
709
710	reqp = (VMMDevReqMousePointer *) p;
711	reqp->width = w;
712	reqp->height = h;
713	reqp->xHot = bitsp->xhot;
714	reqp->yHot = bitsp->yhot;
715	reqp->fFlags = VBOX_MOUSE_POINTER_SHAPE;
716	reqp->header.size = size;
717
718	#ifdef DEBUG_X
719	ErrorF ("shape = %p\n", p);
720	vbox_show_shape (w, h, bc, c);
721	#endif
722
723	return p;
724	}
725
726	#ifdef ARGB_CURSOR
727	static Bool vbox_use_hw_cursor_argb (ScreenPtr pScreen, CursorPtr pCurs)
728	{
729	ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
730	Bool rc = TRUE;
731
732	if (!vbox_host_uses_hwcursor(pScrn))
733	rc = FALSE;
734	if ( rc
735	&& ( (pCurs->bits->height > VBOX_MAX_CURSOR_HEIGHT)
736	\|\| (pCurs->bits->width > VBOX_MAX_CURSOR_WIDTH)
737	\|\| (pScrn->bitsPerPixel <= 8)
738	)
739	)
740	rc = FALSE;
741	return rc;
742	}
743
744	static void vbox_load_cursor_argb (ScrnInfoPtr pScrn, CursorPtr pCurs)
745	{
746	VBOXPtr pVBox;
747	VMMDevReqMousePointer *reqp;
748	CursorBitsPtr bitsp;
749	unsigned short w, h;
750	unsigned short cx, cy;
751	unsigned char *pm;
752	CARD32 *pc;
753	size_t size, mask_size;
754	CARD8 *p;
755	int scrnIndex;
756
757	pVBox = pScrn->driverPrivate;
758	bitsp = pCurs->bits;
759	w = bitsp->width;
760	h = bitsp->height;
761	scrnIndex = pScrn->scrnIndex;
762
763	/* Mask must be generated for alpha cursors, that is required by VBox. */
764	/* @note: (michael) the next struct must be 32bit aligned. */
765	mask_size = ((w + 7) / 8 * h + 3) & ~3;
766
767	if (!w \|\| !h \|\| w > VBOX_MAX_CURSOR_WIDTH \|\| h > VBOX_MAX_CURSOR_HEIGHT)
768	RETERROR(scrnIndex, ,
769	"Error invalid cursor dimensions %dx%d\n", w, h);
770
771	if ((bitsp->xhot > w) \|\| (bitsp->yhot > h))
772	RETERROR(scrnIndex, ,
773	"Error invalid cursor hotspot location %dx%d (max %dx%d)\n",
774	bitsp->xhot, bitsp->yhot, w, h);
775
776	size = w * h * 4 + pVBox->pointerHeaderSize + mask_size;
777	p = xcalloc (1, size);
778	if (!p)
779	RETERROR(scrnIndex, ,
780	"Error failed to alloc %lu bytes for cursor\n",
781	(unsigned long) size);
782
783	reqp = (VMMDevReqMousePointer *) p;
784	reqp = pVBox->reqp;
785	reqp->width = w;
786	reqp->height = h;
787	reqp->xHot = bitsp->xhot;
788	reqp->yHot = bitsp->yhot;
789	reqp->fFlags = VBOX_MOUSE_POINTER_SHAPE \| VBOX_MOUSE_POINTER_ALPHA;
790	reqp->header.size = size;
791
792	memcpy (p + offsetof (VMMDevReqMousePointer, pointerData) + mask_size,
793	bitsp->argb, w * h * 4);
794
795	/** @ */
796	/* Emulate the AND mask. */
797	pm = p + offsetof (VMMDevReqMousePointer, pointerData);
798	pc = bitsp->argb;
799
800	/* Init AND mask to 1 */
801	memset (pm, 0xFF, mask_size);
802
803	/**
804	* The additions driver must provide the AND mask for alpha cursors. The host frontend
805	* which can handle alpha channel, will ignore the AND mask and draw an alpha cursor.
806	* But if the host does not support ARGB, then it simply uses the AND mask and the color
807	* data to draw a normal color cursor.
808	*/
809	for (cy = 0; cy < h; cy++)
810	{
811	unsigned char bitmask = 0x80;
812
813	for (cx = 0; cx < w; cx++, bitmask >>= 1)
814	{
815	if (bitmask == 0)
816	bitmask = 0x80;
817
818	if (pc[cx] >= 0xF0000000)
819	pm[cx / 8] &= ~bitmask;
820	}
821
822	/* Point to next source and dest scans */
823	pc += w;
824	pm += (w + 7) / 8;
825	}
826
827	if (vbox_vmmcall (pScrn, pVBox, &reqp->header) != TRUE)
828	xf86DrvMsg(pScrn->scrnIndex, X_ERROR,
829	"Request to virtual machine failed "
830	"- unable to set the virtual mouse pointer ARGB cursor image.\n");
831
832	xfree (p);
833	}
834	#endif
835
836	Bool vbox_cursor_init (ScreenPtr pScreen)
837	{
838	ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
839	VBOXPtr pVBox = pScrn->driverPrivate;
840	xf86CursorInfoPtr pCurs;
841	Bool rc;
842
843	pVBox->pCurs = pCurs = xf86CreateCursorInfoRec ();
844	if (!pCurs)
845	RETERROR(pScrn->scrnIndex, FALSE,
846	"Failed to create X Window cursor information structures for virtual mouse.\n");
847
848	pCurs->MaxWidth = VBOX_MAX_CURSOR_WIDTH;
849	pCurs->MaxHeight = VBOX_MAX_CURSOR_HEIGHT;
850	pCurs->Flags = HARDWARE_CURSOR_TRUECOLOR_AT_8BPP
851	\| HARDWARE_CURSOR_SOURCE_MASK_INTERLEAVE_1
852	\| HARDWARE_CURSOR_BIT_ORDER_MSBFIRST;
853
854	pCurs->SetCursorColors = vbox_set_cursor_colors;
855	pCurs->SetCursorPosition = vbox_set_cursor_position;
856	pCurs->LoadCursorImage = vbox_load_cursor_image;
857	pCurs->HideCursor = vbox_hide_cursor;
858	pCurs->ShowCursor = vbox_show_cursor;
859	pCurs->UseHWCursor = vbox_use_hw_cursor;
860	pCurs->RealizeCursor = vbox_realize_cursor;
861
862	#ifdef ARGB_CURSOR
863	pCurs->UseHWCursorARGB = vbox_use_hw_cursor_argb;
864	pCurs->LoadCursorARGB = vbox_load_cursor_argb;
865	#endif
866
867	/* Hide the host cursor before we initialise if we wish to use a
868	* software cursor. */
869	if (pVBox->forceSWCursor)
870	vbox_vmm_hide_cursor(pScrn, pVBox);
871	rc = xf86InitCursor (pScreen, pCurs);
872	if (rc == TRUE)
873	return TRUE;
874	RETERROR(pScrn->scrnIndex, FALSE, "Failed to enable mouse pointer integration.\n");
875	}
876
877	/**
878	* Inform VBox that we will supply it with dirty rectangle information
879	* and install the dirty rectangle handler.
880	*
881	* @returns TRUE for success, FALSE for failure
882	* @param pScreen Pointer to a structure describing the X screen in use
883	*/
884	Bool
885	vboxEnableVbva(ScrnInfoPtr pScrn)
886	{
887	int scrnIndex = pScrn->scrnIndex;
888	VBOXPtr pVBox = pScrn->driverPrivate;
889
890	if (pVBox->useVbva != TRUE)
891	return FALSE;
892	pVBox->reqe->u32Enable = 1;
893	pVBox->reqe->cbRingBuffer = VBVA_RING_BUFFER_SIZE;
894	pVBox->reqe->fu32Status = 0;
895	if (vbox_vmmcall(pScrn, pVBox, (VMMDevRequestHeader *) pVBox->reqe)
896	!= TRUE)
897	{
898	/* Request not accepted - disable for old hosts. */
899	xf86DrvMsg(scrnIndex, X_ERROR,
900	"Unable to activate VirtualBox graphics acceleration "
901	"- the request to the virtual machine failed. "
902	"You may be running an old version of VirtualBox.\n");
903	pVBox->useVbva = FALSE;
904	pVBox->reqe->u32Enable = 0;
905	pVBox->reqe->cbRingBuffer = VBVA_RING_BUFFER_SIZE;
906	pVBox->reqe->fu32Status = 0;
907	vbox_vmmcall(pScrn, pVBox, (VMMDevRequestHeader *) pVBox->reqe);
908	return FALSE;
909	}
910	return TRUE;
911	}
912
913
914	/**
915	* Inform VBox that we will stop supplying it with dirty rectangle
916	* information. This function is intended to be called when an X
917	* virtual terminal is disabled, or the X server is terminated.
918	*
919	* @returns TRUE for success, FALSE for failure
920	* @param pScreen Pointer to a structure describing the X screen in use
921	*/
922	Bool
923	vboxDisableVbva(ScrnInfoPtr pScrn)
924	{
925	int scrnIndex = pScrn->scrnIndex;
926	VBOXPtr pVBox = pScrn->driverPrivate;
927
928	if (pVBox->useVbva != TRUE) /* Ths function should not have been called */
929	return FALSE;
930	pVBox->reqe->u32Enable = 0;
931	pVBox->reqe->cbRingBuffer = VBVA_RING_BUFFER_SIZE;
932	pVBox->reqe->fu32Status = 0;
933	if (vbox_vmmcall(pScrn, pVBox, (VMMDevRequestHeader *) pVBox->reqe)
934	!= TRUE)
935	xf86DrvMsg(scrnIndex, X_ERROR,
936	"Unable to disable VirtualBox graphics acceleration "
937	"- the request to the virtual machine failed.\n");
938	else
939	memset(pVBox->pVbvaMemory, 0, sizeof(VBVAMEMORY));
940	return TRUE;
941	}
942
943
944	/**
945	* Query the last display change request.
946	*
947	* @returns iprt status value
948	* @param xres where to store the horizontal pixel resolution requested
949	* (0 = do not change)
950	* @param yres where to store the vertical pixel resolution requested
951	* (0 = do not change)
952	* @param bpp where to store the bits per pixel requeste
953	* (0 = do not change)
954	* @param display Where to store the display number the request was for -
955	* 0 for the primary display, 1 for the first secondary, etc.
956	*/
957	Bool
958	vboxGetDisplayChangeRequest(ScrnInfoPtr pScrn, uint32_t pX, uint32_t pY,
959	uint32_t pBpp, uint32_t pDisplay)
960	{
961	int rc, scrnIndex = pScrn->scrnIndex;
962	VBOXPtr pVBox = pScrn->driverPrivate;
963
964	VMMDevDisplayChangeRequest2 Req = { { 0 } };
965	vmmdevInitRequest(&Req.header, VMMDevReq_GetDisplayChangeRequest2);
966	rc = vbox_vmmcall(pScrn, pVBox, &Req.header);
967	if (RT_SUCCESS(rc))
968	{
969	*pX = Req.xres;
970	*pY = Req.yres;
971	*pBpp = Req.bpp;
972	*pDisplay = Req.display;
973	return TRUE;
974	}
975	xf86DrvMsg(scrnIndex, X_ERROR,
976	"Failed to request the last resolution requested from the guest, rc=%d.\n",
977	rc);
978	return FALSE;
979	}

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source: vbox/trunk/src/VBox/Additions/x11/vboxvideo/vboxutils_68.c@ 31890

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