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VBoxGuestR3LibVideo.cpp

Last change on this file was 98103, checked in by vboxsync, 16 months ago
Copyright year updates by scm.
Property svn:eol-style set to `native` Property svn:keywords set to `Id Revision`
File size: 23.4 KB

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1	/* $Id: VBoxGuestR3LibVideo.cpp 98103 2023-01-17 14:15:46Z vboxsync $ */
2	/** @file
3	* VBoxGuestR3Lib - Ring-3 Support Library for VirtualBox guest additions, Video.
4	*/
5
6	/*
7	* Copyright (C) 2007-2023 Oracle and/or its affiliates.
8	*
9	* This file is part of VirtualBox base platform packages, as
10	* available from https://www.virtualbox.org.
11	*
12	* This program is free software; you can redistribute it and/or
13	* modify it under the terms of the GNU General Public License
14	* as published by the Free Software Foundation, in version 3 of the
15	* License.
16	*
17	* This program is distributed in the hope that it will be useful, but
18	* WITHOUT ANY WARRANTY; without even the implied warranty of
19	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20	* General Public License for more details.
21	*
22	* You should have received a copy of the GNU General Public License
23	* along with this program; if not, see <https://www.gnu.org/licenses>.
24	*
25	* The contents of this file may alternatively be used under the terms
26	* of the Common Development and Distribution License Version 1.0
27	* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
28	* in the VirtualBox distribution, in which case the provisions of the
29	* CDDL are applicable instead of those of the GPL.
30	*
31	* You may elect to license modified versions of this file under the
32	* terms and conditions of either the GPL or the CDDL or both.
33	*
34	* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
35	*/
36
37
38	/*********************************************************************************************************************************
39	* Header Files *
40	*********************************************************************************************************************************/
41	#include "VBoxGuestR3LibInternal.h"
42
43	#include <VBox/log.h>
44	#include <VBox/HostServices/GuestPropertySvc.h> /* For Save and RetrieveVideoMode */
45	#include <iprt/assert.h>
46	#include <iprt/mem.h>
47	#include <iprt/string.h>
48
49	#ifdef VBOX_VBGLR3_XFREE86
50	/* Rather than try to resolve all the header file conflicts, I will just
51	prototype what we need here. */
52	extern "C" void* xf86memcpy(void,const void,xf86size_t);
53	# undef memcpy
54	# define memcpy xf86memcpy
55	extern "C" void* xf86memset(const void*,int,xf86size_t);
56	# undef memset
57	# define memset xf86memset
58	#endif /* VBOX_VBGLR3_XFREE86 */
59
60
61	/*********************************************************************************************************************************
62	* Defined Constants And Macros *
63	*********************************************************************************************************************************/
64	#define VIDEO_PROP_PREFIX "/VirtualBox/GuestAdd/Vbgl/Video/"
65
66
67	/**
68	* Enable or disable video acceleration.
69	*
70	* @returns VBox status code.
71	*
72	* @param fEnable Pass zero to disable, any other value to enable.
73	*/
74	VBGLR3DECL(int) VbglR3VideoAccelEnable(bool fEnable)
75	{
76	VMMDevVideoAccelEnable Req;
77	vmmdevInitRequest(&Req.header, VMMDevReq_VideoAccelEnable);
78	Req.u32Enable = fEnable;
79	Req.cbRingBuffer = VMMDEV_VBVA_RING_BUFFER_SIZE;
80	Req.fu32Status = 0;
81	return vbglR3GRPerform(&Req.header);
82	}
83
84
85	/**
86	* Flush the video buffer.
87	*
88	* @returns VBox status code.
89	*/
90	VBGLR3DECL(int) VbglR3VideoAccelFlush(void)
91	{
92	VMMDevVideoAccelFlush Req;
93	vmmdevInitRequest(&Req.header, VMMDevReq_VideoAccelFlush);
94	return vbglR3GRPerform(&Req.header);
95	}
96
97
98	/**
99	* Send mouse pointer shape information to the host.
100	*
101	* @returns VBox status code.
102	*
103	* @param fFlags Mouse pointer flags.
104	* @param xHot X coordinate of hot spot.
105	* @param yHot Y coordinate of hot spot.
106	* @param cx Pointer width.
107	* @param cy Pointer height.
108	* @param pvImg Pointer to the image data (can be NULL).
109	* @param cbImg Size of the image data pointed to by pvImg.
110	*/
111	VBGLR3DECL(int) VbglR3SetPointerShape(uint32_t fFlags, uint32_t xHot, uint32_t yHot, uint32_t cx, uint32_t cy,
112	const void *pvImg, size_t cbImg)
113	{
114	VMMDevReqMousePointer *pReq;
115	size_t cbReq = vmmdevGetMousePointerReqSize(cx, cy);
116	AssertReturn( !pvImg
117	\|\| cbReq == RT_UOFFSETOF(VMMDevReqMousePointer, pointerData) + cbImg,
118	VERR_INVALID_PARAMETER);
119	int rc = vbglR3GRAlloc((VMMDevRequestHeader **)&pReq, cbReq, VMMDevReq_SetPointerShape);
120	if (RT_SUCCESS(rc))
121	{
122	pReq->fFlags = fFlags;
123	pReq->xHot = xHot;
124	pReq->yHot = yHot;
125	pReq->width = cx;
126	pReq->height = cy;
127	if (pvImg)
128	memcpy(pReq->pointerData, pvImg, cbImg);
129
130	rc = vbglR3GRPerform(&pReq->header);
131	if (RT_SUCCESS(rc))
132	rc = pReq->header.rc;
133	vbglR3GRFree(&pReq->header);
134	}
135	return rc;
136	}
137
138
139	/**
140	* Send mouse pointer shape information to the host.
141	* This version of the function accepts a request for clients that
142	* already allocate and manipulate the request structure directly.
143	*
144	* @returns VBox status code.
145	*
146	* @param pReq Pointer to the VMMDevReqMousePointer structure.
147	*/
148	VBGLR3DECL(int) VbglR3SetPointerShapeReq(VMMDevReqMousePointer *pReq)
149	{
150	int rc = vbglR3GRPerform(&pReq->header);
151	if (RT_SUCCESS(rc))
152	rc = pReq->header.rc;
153	return rc;
154	}
155
156
157	/**
158	* Query the last display change request sent from the host to the guest.
159	*
160	* @returns iprt status value
161	* @param pcx Where to store the horizontal pixel resolution
162	* @param pcy Where to store the vertical pixel resolution
163	* requested (a value of zero means do not change).
164	* @param pcBits Where to store the bits per pixel requested (a value
165	* of zero means do not change).
166	* @param piDisplay Where to store the display number the request was for
167	* - 0 for the primary display, 1 for the first
168	* secondary display, etc.
169	* @param fAck whether or not to acknowledge the newest request sent by
170	* the host. If this is set, the function will return the
171	* most recent host request, otherwise it will return the
172	* last request to be acknowledged.
173	*
174	*/
175	static int getDisplayChangeRequest2(uint32_t pcx, uint32_t pcy,
176	uint32_t pcBits, uint32_t piDisplay,
177	bool fAck)
178	{
179	VMMDevDisplayChangeRequest2 Req;
180
181	AssertPtrReturn(pcx, VERR_INVALID_PARAMETER);
182	AssertPtrReturn(pcy, VERR_INVALID_PARAMETER);
183	AssertPtrReturn(pcBits, VERR_INVALID_PARAMETER);
184	AssertPtrReturn(piDisplay, VERR_INVALID_PARAMETER);
185	RT_ZERO(Req);
186	vmmdevInitRequest(&Req.header, VMMDevReq_GetDisplayChangeRequest2);
187	if (fAck)
188	Req.eventAck = VMMDEV_EVENT_DISPLAY_CHANGE_REQUEST;
189	int rc = vbglR3GRPerform(&Req.header);
190	if (RT_SUCCESS(rc))
191	rc = Req.header.rc;
192	if (RT_SUCCESS(rc))
193	{
194	*pcx = Req.xres;
195	*pcy = Req.yres;
196	*pcBits = Req.bpp;
197	*piDisplay = Req.display;
198	}
199	return rc;
200	}
201
202
203	/**
204	* Query the last display change request sent from the host to the guest.
205	*
206	* @returns iprt status value
207	* @param pcx Where to store the horizontal pixel resolution
208	* requested (a value of zero means do not change).
209	* @param pcy Where to store the vertical pixel resolution
210	* requested (a value of zero means do not change).
211	* @param pcBits Where to store the bits per pixel requested (a value
212	* of zero means do not change).
213	* @param piDisplay Where to store the display number the request was for
214	* - 0 for the primary display, 1 for the first
215	* secondary display, etc.
216	* @param fAck whether or not to acknowledge the newest request sent by
217	* the host. If this is set, the function will return the
218	* most recent host request, otherwise it will return the
219	* last request to be acknowledged.
220	*
221	* @param pdx New horizontal position of the secondary monitor.
222	* Optional.
223	* @param pdy New vertical position of the secondary monitor.
224	* Optional.
225	* @param pfEnabled Secondary monitor is enabled or not. Optional.
226	* @param pfChangeOrigin Whether the mode hint retrieved included
227	* information about origin/display offset inside the
228	* frame-buffer. Optional.
229	*
230	*/
231	VBGLR3DECL(int) VbglR3GetDisplayChangeRequest(uint32_t pcx, uint32_t pcy,
232	uint32_t *pcBits,
233	uint32_t *piDisplay,
234	uint32_t pdx, uint32_t pdy,
235	bool *pfEnabled,
236	bool *pfChangeOrigin,
237	bool fAck)
238	{
239	VMMDevDisplayChangeRequestEx Req;
240	int rc = VINF_SUCCESS;
241
242	AssertPtrReturn(pcx, VERR_INVALID_PARAMETER);
243	AssertPtrReturn(pcy, VERR_INVALID_PARAMETER);
244	AssertPtrReturn(pcBits, VERR_INVALID_PARAMETER);
245	AssertPtrNullReturn(pdx, VERR_INVALID_PARAMETER);
246	AssertPtrNullReturn(pdy, VERR_INVALID_PARAMETER);
247	AssertPtrReturn(piDisplay, VERR_INVALID_PARAMETER);
248	AssertPtrNullReturn(pfEnabled, VERR_INVALID_PARAMETER);
249	AssertPtrNullReturn(pfChangeOrigin, VERR_INVALID_PARAMETER);
250
251	RT_ZERO(Req);
252	rc = vmmdevInitRequest(&Req.header, VMMDevReq_GetDisplayChangeRequestEx);
253	AssertRCReturn(rc, rc);
254	if (fAck)
255	Req.eventAck = VMMDEV_EVENT_DISPLAY_CHANGE_REQUEST;
256	rc = vbglR3GRPerform(&Req.header);
257	if (RT_SUCCESS(rc))
258	rc = Req.header.rc;
259	if (RT_SUCCESS(rc))
260	{
261	*pcx = Req.xres;
262	*pcy = Req.yres;
263	*pcBits = Req.bpp;
264	*piDisplay = Req.display;
265	if (pdx)
266	*pdx = Req.cxOrigin;
267	if (pdy)
268	*pdy = Req.cyOrigin;
269	if (pfEnabled)
270	*pfEnabled = Req.fEnabled;
271	if (pfChangeOrigin)
272	*pfChangeOrigin = Req.fChangeOrigin;
273	return VINF_SUCCESS;
274	}
275
276	/* NEEDS TESTING: test below with current Additions on VBox 4.1 or older. */
277	/** @todo Can we find some standard grep-able string for "NEEDS TESTING"? */
278	if (rc == VERR_NOT_IMPLEMENTED) /* Fall back to the old API. */
279	{
280	if (pfEnabled)
281	*pfEnabled = true;
282	if (pfChangeOrigin)
283	*pfChangeOrigin = false;
284	return getDisplayChangeRequest2(pcx, pcy, pcBits, piDisplay, fAck);
285	}
286	return rc;
287	}
288
289
290	/**
291	* Query the last display change request sent from the host to the guest.
292	*
293	* @returns iprt status value
294	* @param cDisplaysIn How many elements in the paDisplays array.
295	* @param pcDisplaysOut How many elements were returned.
296	* @param paDisplays Display information.
297	* @param fAck Whether or not to acknowledge the newest request sent by
298	* the host. If this is set, the function will return the
299	* most recent host request, otherwise it will return the
300	* last request to be acknowledged.
301	*/
302	VBGLR3DECL(int) VbglR3GetDisplayChangeRequestMulti(uint32_t cDisplaysIn,
303	uint32_t *pcDisplaysOut,
304	VMMDevDisplayDef *paDisplays,
305	bool fAck)
306	{
307	VMMDevDisplayChangeRequestMulti *pReq;
308	size_t cbDisplays;
309	size_t cbAlloc;
310	int rc = VINF_SUCCESS;
311
312	AssertReturn(cDisplaysIn > 0 && cDisplaysIn <= 64 /* VBOX_VIDEO_MAX_SCREENS */, VERR_INVALID_PARAMETER);
313	AssertPtrReturn(pcDisplaysOut, VERR_INVALID_PARAMETER);
314	AssertPtrReturn(paDisplays, VERR_INVALID_PARAMETER);
315
316	cbDisplays = cDisplaysIn * sizeof(VMMDevDisplayDef);
317	cbAlloc = RT_UOFFSETOF(VMMDevDisplayChangeRequestMulti, aDisplays) + cbDisplays;
318	pReq = (VMMDevDisplayChangeRequestMulti *)RTMemTmpAlloc(cbAlloc);
319	AssertPtrReturn(pReq, VERR_NO_MEMORY);
320
321	memset(pReq, 0, cbAlloc);
322	rc = vmmdevInitRequest(&pReq->header, VMMDevReq_GetDisplayChangeRequestMulti);
323	AssertRCReturnStmt(rc, RTMemTmpFree(pReq), rc);
324
325	pReq->header.size += (uint32_t)cbDisplays;
326	pReq->cDisplays = cDisplaysIn;
327	if (fAck)
328	pReq->eventAck = VMMDEV_EVENT_DISPLAY_CHANGE_REQUEST;
329
330	rc = vbglR3GRPerform(&pReq->header);
331	AssertRCReturnStmt(rc, RTMemTmpFree(pReq), rc);
332
333	rc = pReq->header.rc;
334	if (RT_SUCCESS(rc))
335	{
336	memcpy(paDisplays, pReq->aDisplays, pReq->cDisplays * sizeof(VMMDevDisplayDef));
337	*pcDisplaysOut = pReq->cDisplays;
338	}
339
340	RTMemTmpFree(pReq);
341	return rc;
342	}
343
344
345	/**
346	* Query the host as to whether it likes a specific video mode.
347	*
348	* @returns the result of the query
349	* @param cx the width of the mode being queried
350	* @param cy the height of the mode being queried
351	* @param cBits the bpp of the mode being queried
352	*/
353	VBGLR3DECL(bool) VbglR3HostLikesVideoMode(uint32_t cx, uint32_t cy, uint32_t cBits)
354	{
355	bool fRc = true; /* If for some reason we can't contact the host then
356	* we like everything. */
357	int rc;
358	VMMDevVideoModeSupportedRequest req;
359
360	vmmdevInitRequest(&req.header, VMMDevReq_VideoModeSupported);
361	req.width = cx;
362	req.height = cy;
363	req.bpp = cBits;
364	req.fSupported = true;
365	rc = vbglR3GRPerform(&req.header);
366	if (RT_SUCCESS(rc) && RT_SUCCESS(req.header.rc))
367	fRc = req.fSupported;
368	return fRc;
369	}
370
371	/**
372	* Get the highest screen number for which there is a saved video mode or "0"
373	* if there are no saved modes.
374	*
375	* @returns iprt status value
376	* @returns VERR_NOT_SUPPORTED if the guest property service is not available.
377	* @param pcScreen where to store the virtual screen number
378	*/
379	VBGLR3DECL(int) VbglR3VideoModeGetHighestSavedScreen(unsigned *pcScreen)
380	{
381	#if defined(VBOX_WITH_GUEST_PROPS)
382	int rc;
383	HGCMCLIENTID idClient = 0;
384	PVBGLR3GUESTPROPENUM pHandle = NULL;
385	const char *pszName = NULL;
386	unsigned cHighestScreen = 0;
387
388	/* Validate input. */
389	AssertPtrReturn(pcScreen, VERR_INVALID_POINTER);
390
391	/* Query the data. */
392	rc = VbglR3GuestPropConnect(&idClient);
393	if (RT_SUCCESS(rc))
394	{
395	const char pszPattern = VIDEO_PROP_PREFIX"";
396	rc = VbglR3GuestPropEnum(idClient, &pszPattern, 1, &pHandle, &pszName, NULL, NULL, NULL);
397	int rc2 = VbglR3GuestPropDisconnect(idClient);
398	if (RT_FAILURE(rc2) && RT_SUCCESS(rc))
399	rc = rc2;
400	}
401
402	/* Process the data. */
403	while (RT_SUCCESS(rc) && pszName != NULL)
404	{
405	uint32_t cScreen;
406
407	rc = RTStrToUInt32Full(pszName + sizeof(VIDEO_PROP_PREFIX) - 1, 10, &cScreen);
408	if (RT_SUCCESS(rc)) /* There may be similar properties with text. */
409	cHighestScreen = RT_MAX(cHighestScreen, cScreen);
410	rc = VbglR3GuestPropEnumNext(pHandle, &pszName, NULL, NULL, NULL);
411	}
412
413	VbglR3GuestPropEnumFree(pHandle);
414
415	/* Return result. */
416	if (RT_SUCCESS(rc))
417	*pcScreen = cHighestScreen;
418	return rc;
419	#else /* !VBOX_WITH_GUEST_PROPS */
420	RT_NOREF(pcScreen);
421	return VERR_NOT_SUPPORTED;
422	#endif /* !VBOX_WITH_GUEST_PROPS */
423	}
424
425	/**
426	* Save video mode parameters to the guest property store.
427	*
428	* @returns iprt status value
429	* @param idScreen The virtual screen number.
430	* @param cx mode width
431	* @param cy mode height
432	* @param cBits bits per pixel for the mode
433	* @param x virtual screen X offset
434	* @param y virtual screen Y offset
435	* @param fEnabled is this virtual screen enabled?
436	*/
437	VBGLR3DECL(int) VbglR3SaveVideoMode(unsigned idScreen, unsigned cx, unsigned cy, unsigned cBits,
438	unsigned x, unsigned y, bool fEnabled)
439	{
440	#ifdef VBOX_WITH_GUEST_PROPS
441	unsigned cHighestScreen = 0;
442	int rc = VbglR3VideoModeGetHighestSavedScreen(&cHighestScreen);
443	if (RT_SUCCESS(rc))
444	{
445	HGCMCLIENTID idClient = 0;
446	rc = VbglR3GuestPropConnect(&idClient);
447	if (RT_SUCCESS(rc))
448	{
449	int rc2;
450	char szModeName[GUEST_PROP_MAX_NAME_LEN];
451	char szModeParms[GUEST_PROP_MAX_VALUE_LEN];
452	RTStrPrintf(szModeName, sizeof(szModeName), VIDEO_PROP_PREFIX "%u", idScreen);
453	RTStrPrintf(szModeParms, sizeof(szModeParms), "%ux%ux%u,%ux%u,%u", cx, cy, cBits, x, y, (unsigned) fEnabled);
454
455	rc = VbglR3GuestPropWriteValue(idClient, szModeName, szModeParms);
456	/* Write out the mode using the legacy name too, in case the user
457	* re-installs older Additions. */
458	if (idScreen == 0)
459	{
460	RTStrPrintf(szModeParms, sizeof(szModeParms), "%ux%ux%u", cx, cy, cBits);
461	VbglR3GuestPropWriteValue(idClient, VIDEO_PROP_PREFIX "SavedMode", szModeParms);
462	}
463
464	rc2 = VbglR3GuestPropDisconnect(idClient);
465	if (rc != VINF_PERMISSION_DENIED)
466	{
467	if (RT_SUCCESS(rc))
468	rc = rc2;
469	if (RT_SUCCESS(rc))
470	{
471	/* Sanity check 1. We do not try to make allowance for someone else
472	* changing saved settings at the same time as us. */
473	bool fEnabled2 = false;
474	unsigned cx2 = 0;
475	unsigned cy2 = 0;
476	unsigned cBits2 = 0;
477	unsigned x2 = 0;
478	unsigned y2 = 0;
479	rc = VbglR3RetrieveVideoMode(idScreen, &cx2, &cy2, &cBits2, &x2, &y2, &fEnabled2);
480	if ( RT_SUCCESS(rc)
481	&& (cx != cx2 \|\| cy != cy2 \|\| cBits != cBits2 \|\| x != x2 \|\| y != y2 \|\| fEnabled != fEnabled2))
482	rc = VERR_WRITE_ERROR;
483	/* Sanity check 2. Same comment. */
484	else if (RT_SUCCESS(rc))
485	{
486	unsigned cHighestScreen2 = 0;
487	rc = VbglR3VideoModeGetHighestSavedScreen(&cHighestScreen2);
488	if (RT_SUCCESS(rc))
489	if (cHighestScreen2 != RT_MAX(cHighestScreen, idScreen))
490	rc = VERR_INTERNAL_ERROR;
491	}
492	}
493	}
494	}
495	}
496	return rc;
497	#else /* !VBOX_WITH_GUEST_PROPS */
498	RT_NOREF(idScreen, cx, cy, cBits, x, y, fEnabled);
499	return VERR_NOT_SUPPORTED;
500	#endif /* !VBOX_WITH_GUEST_PROPS */
501	}
502
503
504	/**
505	* Retrieve video mode parameters from the guest property store.
506	*
507	* @returns iprt status value
508	* @param idScreen The virtual screen number.
509	* @param pcx where to store the mode width
510	* @param pcy where to store the mode height
511	* @param pcBits where to store the bits per pixel for the mode
512	* @param px where to store the virtual screen X offset
513	* @param py where to store the virtual screen Y offset
514	* @param pfEnabled where to store whether this virtual screen is enabled
515	*/
516	VBGLR3DECL(int) VbglR3RetrieveVideoMode(unsigned idScreen,
517	unsigned pcx, unsigned pcy,
518	unsigned *pcBits,
519	unsigned px, unsigned py,
520	bool *pfEnabled)
521	{
522	#ifdef VBOX_WITH_GUEST_PROPS
523	/*
524	* First we retrieve the video mode which is saved as a string in the
525	* guest property store.
526	*/
527	HGCMCLIENTID idClient = 0;
528	int rc = VbglR3GuestPropConnect(&idClient);
529	if (RT_SUCCESS(rc))
530	{
531	int rc2;
532	/* The buffer for VbglR3GuestPropReadValue. If this is too small then
533	* something is wrong with the data stored in the property. */
534	char szModeParms[1024];
535	char szModeName[GUEST_PROP_MAX_NAME_LEN]; /** @todo add a VbglR3GuestPropReadValueF/FV that does the RTStrPrintf for you. */
536	RTStrPrintf(szModeName, sizeof(szModeName), VIDEO_PROP_PREFIX "%u", idScreen);
537	rc = VbglR3GuestPropReadValue(idClient, szModeName, szModeParms, sizeof(szModeParms), NULL);
538	/* Try legacy single screen name. */
539	if (rc == VERR_NOT_FOUND && idScreen == 0)
540	rc = VbglR3GuestPropReadValue(idClient,
541	VIDEO_PROP_PREFIX"SavedMode",
542	szModeParms, sizeof(szModeParms),
543	NULL);
544	rc2 = VbglR3GuestPropDisconnect(idClient);
545	if (RT_SUCCESS(rc))
546	rc = rc2;
547
548	/*
549	* Now we convert the string returned to numeric values.
550	*/
551	if (RT_SUCCESS(rc))
552	{
553	/* Mandatory chunk: 640x480x32 */
554	char *pszNext;
555	uint32_t cx = 0;
556	rc = VERR_PARSE_ERROR;
557	rc2 = RTStrToUInt32Ex(szModeParms, &pszNext, 10, &cx);
558	if (rc2 == VWRN_TRAILING_CHARS && *pszNext == 'x')
559	{
560	uint32_t cy = 0;
561	rc2 = RTStrToUInt32Ex(pszNext + 1, &pszNext, 10, &cy);
562	if (rc2 == VWRN_TRAILING_CHARS && *pszNext == 'x')
563	{
564	uint8_t cBits = 0;
565	rc2 = RTStrToUInt8Ex(pszNext + 1, &pszNext, 10, &cBits);
566	if (rc2 == VINF_SUCCESS \|\| rc2 == VWRN_TRAILING_CHARS)
567	{
568	/* Optional chunk: ,32x64,1 (we fail if this is partially there) */
569	uint32_t x = 0;
570	uint32_t y = 0;
571	uint8_t fEnabled = 1;
572	if (rc2 == VINF_SUCCESS)
573	rc = VINF_SUCCESS;
574	else if (*pszNext == ',')
575	{
576	rc2 = RTStrToUInt32Ex(pszNext + 1, &pszNext, 10, &x);
577	if (rc2 == VWRN_TRAILING_CHARS && *pszNext == 'x')
578	{
579	rc2 = RTStrToUInt32Ex(pszNext + 1, &pszNext, 10, &y);
580	if (rc2 == VWRN_TRAILING_CHARS && *pszNext == ',')
581	{
582	rc2 = RTStrToUInt8Ex(pszNext + 1, &pszNext, 10, &fEnabled);
583	if (rc2 == VINF_SUCCESS)
584	rc = VINF_SUCCESS;
585	}
586	}
587	}
588
589	/*
590	* Set result if successful.
591	*/
592	if (rc == VINF_SUCCESS)
593	{
594	if (pcx)
595	*pcx = cx;
596	if (pcy)
597	*pcy = cy;
598	if (pcBits)
599	*pcBits = cBits;
600	if (px)
601	*px = x;
602	if (py)
603	*py = y;
604	if (pfEnabled)
605	*pfEnabled = RT_BOOL(fEnabled);
606	}
607	}
608	}
609	}
610	}
611	}
612
613	return rc;
614	#else /* !VBOX_WITH_GUEST_PROPS */
615	RT_NOREF(idScreen, pcx, pcy, pcBits, px, py, pfEnabled);
616	return VERR_NOT_SUPPORTED;
617	#endif /* !VBOX_WITH_GUEST_PROPS */
618	}

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source: vbox/trunk/src/VBox/Additions/common/VBoxGuest/lib/VBoxGuestR3LibVideo.cpp

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