Framebuffer.cpp@ 107044

Last change on this file since 107044 was 106061, checked in by vboxsync, 2 months ago
Copyright year updates by scm.
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1	/* $Id: Framebuffer.cpp 106061 2024-09-16 14:03:52Z vboxsync $ */
2	/** @file
3	* VBoxSDL - Implementation of VBoxSDLFB (SDL framebuffer) class
4	*/
5
6	/*
7	* Copyright (C) 2006-2024 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	* SPDX-License-Identifier: GPL-3.0-only
26	*/
27
28	#define LOG_GROUP LOG_GROUP_GUI
29
30	#include <iprt/asm.h>
31	#include <iprt/stream.h>
32	#include <iprt/env.h>
33	#include <iprt/errcore.h>
34	#include <iprt/mem.h>
35	#include <iprt/string.h>
36	#include <iprt/semaphore.h>
37	#include <VBox/log.h>
38
39	#include "Framebuffer.h"
40	#include "Display.h"
41	#include "Ico64x01.h"
42
43	#include <SDL.h>
44
45	static bool gfSdlInitialized = false; /*< if SDL was initialized /
46	static SDL_Surface gWMIcon = NULL; /< the application icon /
47	static RTNATIVETHREAD gSdlNativeThread = NIL_RTNATIVETHREAD; /*< the SDL thread /
48
49	DECL_HIDDEN_DATA(RTSEMEVENT) g_EventSemSDLEvents;
50	DECL_HIDDEN_DATA(volatile int32_t) g_cNotifyUpdateEventsPending;
51
52	/**
53	* Ensure that an SDL event is really enqueued. Try multiple times if necessary.
54	*/
55	int PushSDLEventForSure(SDL_Event *event)
56	{
57	int ntries = 10;
58	for (; ntries > 0; ntries--)
59	{
60	int rc = SDL_PushEvent(event);
61	RTSemEventSignal(g_EventSemSDLEvents);
62	if (rc == 1)
63	return 0;
64	Log(("PushSDLEventForSure: waiting for 2ms (rc = %d)\n", rc));
65	RTThreadSleep(2);
66	}
67	LogRel(("WARNING: Failed to enqueue SDL event %d.%d!\n",
68	event->type, event->type == SDL_USEREVENT ? event->user.type : 0));
69	return -1;
70	}
71
72	#if defined(VBOXSDL_WITH_X11) \|\| defined(RT_OS_DARWIN)
73	/**
74	* Special SDL_PushEvent function for NotifyUpdate events. These events may occur in bursts
75	* so make sure they don't flood the SDL event queue.
76	*/
77	void PushNotifyUpdateEvent(SDL_Event *event)
78	{
79	int rc = SDL_PushEvent(event);
80	bool fSuccess = (rc == 1);
81
82	RTSemEventSignal(g_EventSemSDLEvents);
83	AssertMsg(fSuccess, ("SDL_PushEvent returned SDL error\n"));
84	/* A global counter is faster than SDL_PeepEvents() */
85	if (fSuccess)
86	ASMAtomicIncS32(&g_cNotifyUpdateEventsPending);
87	/* In order to not flood the SDL event queue, yield the CPU or (if there are already many
88	* events queued) even sleep */
89	if (g_cNotifyUpdateEventsPending > 96)
90	{
91	/* Too many NotifyUpdate events, sleep for a small amount to give the main thread time
92	* to handle these events. The SDL queue can hold up to 128 events. */
93	Log(("PushNotifyUpdateEvent: Sleep 1ms\n"));
94	RTThreadSleep(1);
95	}
96	else
97	RTThreadYield();
98	}
99	#endif /* VBOXSDL_WITH_X11 */
100
101
102	//
103	// Constructor / destructor
104	//
105
106	Framebuffer::Framebuffer(Display *pDisplay, uint32_t uScreenId,
107	bool fFullscreen, bool fResizable, bool fShowSDLConfig,
108	bool fKeepHostRes, uint32_t u32FixedWidth,
109	uint32_t u32FixedHeight, uint32_t u32FixedBPP,
110	bool fUpdateImage)
111	{
112	LogFlow(("Framebuffer::Framebuffer\n"));
113
114	m_pDisplay = pDisplay;
115	mScreenId = uScreenId;
116	mfUpdateImage = fUpdateImage;
117	mpWindow = NULL;
118	mpTexture = NULL;
119	mpRenderer = NULL;
120	mSurfVRAM = NULL;
121	mfInitialized = false;
122	mfFullscreen = fFullscreen;
123	mfKeepHostRes = fKeepHostRes;
124	mTopOffset = 0;
125	mfResizable = fResizable;
126	mfShowSDLConfig = fShowSDLConfig;
127	mFixedSDLWidth = u32FixedWidth;
128	mFixedSDLHeight = u32FixedHeight;
129	mFixedSDLBPP = u32FixedBPP;
130	mCenterXOffset = 0;
131	mCenterYOffset = 0;
132	/* Start with standard screen dimensions. */
133	mGuestXRes = 640;
134	mGuestYRes = 480;
135	mPtrVRAM = NULL;
136	mBitsPerPixel = 0;
137	mBytesPerLine = 0;
138	mfSameSizeRequested = false;
139	mfUpdates = false;
140
141	int rc = RTCritSectInit(&mUpdateLock);
142	AssertMsg(rc == VINF_SUCCESS, ("Error from RTCritSectInit!\n"));
143
144	resizeGuest();
145	mfInitialized = true;
146
147	rc = SDL_GetRendererInfo(mpRenderer, &mRenderInfo);
148	if (RT_SUCCESS(rc))
149	{
150	if (fShowSDLConfig)
151	RTPrintf("Render info:\n"
152	" Name: %s\n"
153	" Render flags: 0x%x\n"
154	" SDL video driver: %s\n",
155	mRenderInfo.name,
156	mRenderInfo.flags,
157	RTEnvGet("SDL_VIDEODRIVER"));
158	}
159	}
160
161
162	Framebuffer::~Framebuffer()
163	{
164	LogFlow(("Framebuffer::~Framebuffer\n"));
165	if (mSurfVRAM)
166	{
167	SDL_FreeSurface(mSurfVRAM);
168	mSurfVRAM = NULL;
169	}
170	RTCritSectDelete(&mUpdateLock);
171	}
172
173	/* static */
174	bool Framebuffer::init(bool fShowSDLConfig)
175	{
176	LogFlow(("VBoxSDLFB::init\n"));
177
178	/* memorize the thread that inited us, that's the SDL thread */
179	gSdlNativeThread = RTThreadNativeSelf();
180
181	#ifdef RT_OS_WINDOWS
182	/* default to DirectX if nothing else set */
183	if (!RTEnvExist("SDL_VIDEODRIVER"))
184	{
185	RTEnvSet("SDL_VIDEODRIVER", "directx");
186	}
187	#endif
188	#ifdef VBOXSDL_WITH_X11
189	/* On some X servers the mouse is stuck inside the bottom right corner.
190	* See http://wiki.clug.org.za/wiki/QEMU_mouse_not_working */
191	RTEnvSet("SDL_VIDEO_X11_DGAMOUSE", "0");
192	#endif
193
194	/* create SDL event semaphore */
195	int vrc = RTSemEventCreate(&g_EventSemSDLEvents);
196	AssertReleaseRC(vrc);
197
198	int rc = SDL_InitSubSystem(SDL_INIT_VIDEO \| SDL_INIT_TIMER \| SDL_INIT_NOPARACHUTE);
199	if (rc != 0)
200	{
201	RTPrintf("SDL Error: '%s'\n", SDL_GetError());
202	return false;
203	}
204	gfSdlInitialized = true;
205
206	RT_NOREF(fShowSDLConfig);
207	return true;
208	}
209
210	/**
211	* Terminate SDL
212	*
213	* @remarks must be called from the SDL thread!
214	*/
215	void Framebuffer::uninit()
216	{
217	if (gfSdlInitialized)
218	{
219	AssertMsg(gSdlNativeThread == RTThreadNativeSelf(), ("Wrong thread! SDL is not threadsafe!\n"));
220	SDL_QuitSubSystem(SDL_INIT_VIDEO);
221	}
222	}
223
224	/**
225	* Returns the current framebuffer width in pixels.
226	*
227	* @returns COM status code
228	* @param width Address of result buffer.
229	*/
230	uint32_t Framebuffer::getWidth()
231	{
232	LogFlow(("Framebuffer::getWidth\n"));
233	return mGuestXRes;
234	}
235
236	/**
237	* Returns the current framebuffer height in pixels.
238	*
239	* @returns COM status code
240	* @param height Address of result buffer.
241	*/
242	uint32_t Framebuffer::getHeight()
243	{
244	LogFlow(("Framebuffer::getHeight\n"));
245	return mGuestYRes;
246	}
247
248	/**
249	* Return the current framebuffer color depth.
250	*
251	* @returns COM status code
252	* @param bitsPerPixel Address of result variable
253	*/
254	uint32_t Framebuffer::getBitsPerPixel()
255	{
256	LogFlow(("Framebuffer::getBitsPerPixel\n"));
257	/* get the information directly from the surface in use */
258	Assert(mSurfVRAM);
259	return mSurfVRAM ? mSurfVRAM->format->BitsPerPixel : 0;
260	}
261
262	/**
263	* Return the current framebuffer line size in bytes.
264	*
265	* @returns COM status code.
266	* @param lineSize Address of result variable.
267	*/
268	uint32_t Framebuffer::getBytesPerLine()
269	{
270	LogFlow(("Framebuffer::getBytesPerLine\n"));
271	/* get the information directly from the surface */
272	Assert(mSurfVRAM);
273	return mSurfVRAM ? mSurfVRAM->pitch : 0;
274	}
275
276	/**
277	* Return the current framebuffer pixel data buffer.
278	*
279	* @returns COM status code.
280	* @param lineSize Address of result variable.
281	*/
282	uint8_t *Framebuffer::getPixelData()
283	{
284	LogFlow(("Framebuffer::getPixelData\n"));
285	/* get the information directly from the surface */
286	Assert(mSurfVRAM);
287	return mSurfVRAM ? (uint8_t *)mSurfVRAM->pixels : NULL;
288	}
289
290	/**
291	* Notify framebuffer of an update.
292	*
293	* @returns COM status code
294	* @param x Update region upper left corner x value.
295	* @param y Update region upper left corner y value.
296	* @param w Update region width in pixels.
297	* @param h Update region height in pixels.
298	* @param finished Address of output flag whether the update
299	* could be fully processed in this call (which
300	* has to return immediately) or VBox should wait
301	* for a call to the update complete API before
302	* continuing with display updates.
303	*/
304	int Framebuffer::notifyUpdate(uint32_t x, uint32_t y,
305	uint32_t w, uint32_t h)
306	{
307	/*
308	* The input values are in guest screen coordinates.
309	*/
310	LogFlow(("Framebuffer::notifyUpdate: x = %d, y = %d, w = %d, h = %d\n",
311	x, y, w, h));
312
313	#if defined(VBOXSDL_WITH_X11) \|\| defined(RT_OS_DARWIN)
314	/*
315	* SDL does not allow us to make this call from any other thread than
316	* the main SDL thread (which initialized the video mode). So we have
317	* to send an event to the main SDL thread and process it there. For
318	* sake of simplicity, we encode all information in the event parameters.
319	*/
320	SDL_Event event;
321	event.type = SDL_USEREVENT;
322	event.user.code = mScreenId;
323	event.user.type = SDL_USER_EVENT_UPDATERECT;
324
325	SDL_Rect pUpdateRect = (SDL_Rect )RTMemAlloc(sizeof(SDL_Rect));
326	AssertPtrReturn(pUpdateRect, VERR_NO_MEMORY);
327	pUpdateRect->x = x;
328	pUpdateRect->y = y;
329	pUpdateRect->w = w;
330	pUpdateRect->h = h;
331	event.user.data1 = pUpdateRect;
332
333	event.user.data2 = NULL;
334	PushNotifyUpdateEvent(&event);
335	#else /* !VBOXSDL_WITH_X11 */
336	update(x, y, w, h, true /* fGuestRelative */);
337	#endif /* !VBOXSDL_WITH_X11 */
338
339	return VINF_SUCCESS;
340	}
341
342
343	int Framebuffer::NotifyUpdateImage(uint32_t aX,
344	uint32_t aY,
345	uint32_t aWidth,
346	uint32_t aHeight,
347	void *pvImage)
348	{
349	LogFlow(("NotifyUpdateImage: %d,%d %dx%d\n", aX, aY, aWidth, aHeight));
350
351	/* Copy to mSurfVRAM. */
352	SDL_Rect srcRect;
353	SDL_Rect dstRect;
354	srcRect.x = 0;
355	srcRect.y = 0;
356	srcRect.w = (uint16_t)aWidth;
357	srcRect.h = (uint16_t)aHeight;
358	dstRect.x = (int16_t)aX;
359	dstRect.y = (int16_t)aY;
360	dstRect.w = (uint16_t)aWidth;
361	dstRect.h = (uint16_t)aHeight;
362
363	const uint32_t Rmask = 0x00FF0000, Gmask = 0x0000FF00, Bmask = 0x000000FF, Amask = 0;
364	SDL_Surface surfSrc = SDL_CreateRGBSurfaceFrom(pvImage, aWidth, aHeight, 32, aWidth 4,
365	Rmask, Gmask, Bmask, Amask);
366	if (surfSrc)
367	{
368	RTCritSectEnter(&mUpdateLock);
369	if (mfUpdates)
370	SDL_BlitSurface(surfSrc, &srcRect, mSurfVRAM, &dstRect);
371	RTCritSectLeave(&mUpdateLock);
372
373	SDL_FreeSurface(surfSrc);
374	}
375
376	return notifyUpdate(aX, aY, aWidth, aHeight);
377	}
378
379	int Framebuffer::notifyChange(uint32_t aScreenId,
380	uint32_t aXOrigin,
381	uint32_t aYOrigin,
382	uint32_t aWidth,
383	uint32_t aHeight)
384	{
385	LogRel(("NotifyChange: %d %d,%d %dx%d\n",
386	aScreenId, aXOrigin, aYOrigin, aWidth, aHeight));
387
388	RTCritSectEnter(&mUpdateLock);
389
390	/* Disable screen updates. */
391	mfUpdates = false;
392
393	mGuestXRes = aWidth;
394	mGuestYRes = aHeight;
395	mPtrVRAM = NULL;
396	mBitsPerPixel = 0;
397	mBytesPerLine = 0;
398
399	RTCritSectLeave(&mUpdateLock);
400
401	SDL_Event event;
402	event.type = SDL_USEREVENT;
403	event.user.type = SDL_USER_EVENT_NOTIFYCHANGE;
404	event.user.code = mScreenId;
405
406	PushSDLEventForSure(&event);
407
408	RTThreadYield();
409
410	return VINF_SUCCESS;
411	}
412
413	//
414	// Internal public methods
415	//
416
417	/* This method runs on the main SDL thread. */
418	void Framebuffer::notifyChange(uint32_t aScreenId)
419	{
420	/* Disable screen updates. */
421	RTCritSectEnter(&mUpdateLock);
422
423	mPtrVRAM = NULL;
424	mBitsPerPixel = 32;
425	mBytesPerLine = mGuestXRes * 4;
426
427	RTCritSectLeave(&mUpdateLock);
428
429	resizeGuest();
430
431	m_pDisplay->i_invalidateAndUpdateScreen(aScreenId);
432	}
433
434	/**
435	* Method that does the actual resize of the guest framebuffer and
436	* then changes the SDL framebuffer setup.
437	*/
438	void Framebuffer::resizeGuest()
439	{
440	LogFlowFunc (("mGuestXRes: %d, mGuestYRes: %d\n", mGuestXRes, mGuestYRes));
441	AssertMsg(gSdlNativeThread == RTThreadNativeSelf(),
442	("Wrong thread! SDL is not threadsafe!\n"));
443
444	RTCritSectEnter(&mUpdateLock);
445
446	const uint32_t Rmask = 0x00FF0000, Gmask = 0x0000FF00, Bmask = 0x000000FF, Amask = 0;
447
448	/* first free the current surface */
449	if (mSurfVRAM)
450	{
451	SDL_FreeSurface(mSurfVRAM);
452	mSurfVRAM = NULL;
453	}
454
455	if (mPtrVRAM)
456	{
457	/* Create a source surface from the source bitmap. */
458	mSurfVRAM = SDL_CreateRGBSurfaceFrom(mPtrVRAM, mGuestXRes, mGuestYRes, mBitsPerPixel,
459	mBytesPerLine, Rmask, Gmask, Bmask, Amask);
460	LogFlow(("Framebuffer:: using the source bitmap\n"));
461	}
462	else
463	{
464	mSurfVRAM = SDL_CreateRGBSurface(SDL_SWSURFACE, mGuestXRes, mGuestYRes, 32,
465	Rmask, Gmask, Bmask, Amask);
466	LogFlow(("Framebuffer:: using SDL_SWSURFACE\n"));
467	}
468	LogFlow(("Framebuffer:: created VRAM surface %p\n", mSurfVRAM));
469
470	if (mfSameSizeRequested)
471	{
472	mfSameSizeRequested = false;
473	LogFlow(("Framebuffer:: the same resolution requested, skipping the resize.\n"));
474	}
475	else
476	{
477	/* now adjust the SDL resolution */
478	resizeSDL();
479	}
480
481	/* Enable screen updates. */
482	mfUpdates = true;
483
484	RTCritSectLeave(&mUpdateLock);
485
486	repaint();
487	}
488
489	/**
490	* Sets SDL video mode. This is independent from guest video
491	* mode changes.
492	*
493	* @remarks Must be called from the SDL thread!
494	*/
495	void Framebuffer::resizeSDL(void)
496	{
497	LogFlow(("VBoxSDL:resizeSDL\n"));
498
499	const int cDisplays = SDL_GetNumVideoDisplays();
500	if (cDisplays > 0)
501	{
502	for (int d = 0; d < cDisplays; d++)
503	{
504	const int cDisplayModes = SDL_GetNumDisplayModes(d);
505	for (int m = 0; m < cDisplayModes; m++)
506	{
507	SDL_DisplayMode mode = { SDL_PIXELFORMAT_UNKNOWN, 0, 0, 0, 0 };
508	if (SDL_GetDisplayMode(d, m, &mode) != 0)
509	{
510	RTPrintf("Display #%d, mode %d:\t\t%i bpp\t%i x %i",
511	SDL_BITSPERPIXEL(mode.format), mode.w, mode.h);
512	}
513
514	if (m == 0)
515	{
516	/*
517	* according to the SDL documentation, the API guarantees that
518	* the modes are sorted from larger to smaller, so we just
519	* take the first entry as the maximum.
520	*/
521	mMaxScreenWidth = mode.w;
522	mMaxScreenHeight = mode.h;
523	}
524
525	/* Keep going. */
526	}
527	}
528	}
529	else
530	AssertFailed(); /** @todo */
531
532	uint32_t newWidth;
533	uint32_t newHeight;
534
535	/* reset the centering offsets */
536	mCenterXOffset = 0;
537	mCenterYOffset = 0;
538
539	/* we either have a fixed SDL resolution or we take the guest's */
540	if (mFixedSDLWidth != ~(uint32_t)0)
541	{
542	newWidth = mFixedSDLWidth;
543	newHeight = mFixedSDLHeight;
544	}
545	else
546	{
547	newWidth = RT_MIN(mGuestXRes, mMaxScreenWidth);
548	newHeight = RT_MIN(mGuestYRes, mMaxScreenHeight);
549	}
550
551	/* we don't have any extra space by default */
552	mTopOffset = 0;
553
554	int sdlWindowFlags = SDL_WINDOW_SHOWN;
555	if (mfResizable)
556	sdlWindowFlags \|= SDL_WINDOW_RESIZABLE;
557	if (!mpWindow)
558	{
559	SDL_DisplayMode desktop_mode;
560	int x = 40 + mScreenId * 20;
561	int y = 40 + mScreenId * 15;
562
563	SDL_GetDesktopDisplayMode(mScreenId, &desktop_mode);
564	/* create new window */
565
566	char szTitle[64];
567	RTStrPrintf(szTitle, sizeof(szTitle), "SDL window %d", mScreenId);
568	mpWindow = SDL_CreateWindow(szTitle, x, y,
569	newWidth, newHeight, sdlWindowFlags);
570	mpRenderer = SDL_CreateRenderer(mpWindow, -1, 0 /* SDL_RendererFlags */);
571	if (mpRenderer)
572	{
573	SDL_GetRendererInfo(mpRenderer, &mRenderInfo);
574
575	mpTexture = SDL_CreateTexture(mpRenderer, desktop_mode.format,
576	SDL_TEXTUREACCESS_STREAMING, newWidth, newHeight);
577	if (!mpTexture)
578	AssertReleaseFailed();
579	}
580	else
581	AssertReleaseFailed();
582
583	if (12320 == g_cbIco64x01)
584	{
585	gWMIcon = SDL_CreateRGBSurface(0 /* Flags, must be 0 */, 64, 64, 24, 0xff, 0xff00, 0xff0000, 0);
586	/** @todo make it as simple as possible. No PNM interpreter here... */
587	if (gWMIcon)
588	{
589	memcpy(gWMIcon->pixels, g_abIco64x01+32, g_cbIco64x01-32);
590	SDL_SetWindowIcon(mpWindow, gWMIcon);
591	}
592	}
593	}
594	else
595	{
596	int w, h;
597	uint32_t format;
598	int access;
599
600	/* resize current window */
601	SDL_GetWindowSize(mpWindow, &w, &h);
602
603	if (w != (int)newWidth \|\| h != (int)newHeight)
604	SDL_SetWindowSize(mpWindow, newWidth, newHeight);
605
606	SDL_QueryTexture(mpTexture, &format, &access, &w, &h);
607	SDL_DestroyTexture(mpTexture);
608	mpTexture = SDL_CreateTexture(mpRenderer, format, access, newWidth, newHeight);
609	if (!mpTexture)
610	AssertReleaseFailed();
611	}
612	}
613
614	/**
615	* Update specified framebuffer area. The coordinates can either be
616	* relative to the guest framebuffer or relative to the screen.
617	*
618	* @remarks Must be called from the SDL thread on Linux!
619	* @param x left column
620	* @param y top row
621	* @param w width in pixels
622	* @param h height in pixels
623	* @param fGuestRelative flag whether the above values are guest relative or screen relative;
624	*/
625	void Framebuffer::update(int x, int y, int w, int h, bool fGuestRelative)
626	{
627	#if defined(VBOXSDL_WITH_X11) \|\| defined(RT_OS_DARWIN)
628	AssertMsg(gSdlNativeThread == RTThreadNativeSelf(), ("Wrong thread! SDL is not threadsafe!\n"));
629	#endif
630	RTCritSectEnter(&mUpdateLock);
631	Log3Func(("mfUpdates=%RTbool %d,%d %dx%d\n", mfUpdates, x, y, w, h));
632	if (!mfUpdates)
633	{
634	RTCritSectLeave(&mUpdateLock);
635	return;
636	}
637
638	Assert(mSurfVRAM);
639	if (!mSurfVRAM)
640	{
641	RTCritSectLeave(&mUpdateLock);
642	return;
643	}
644
645	/* this is how many pixels we have to cut off from the height for this specific blit */
646	int const yCutoffGuest = 0;
647
648	/**
649	* If we get a SDL window relative update, we
650	* just perform a full screen update to keep things simple.
651	*
652	* @todo improve
653	*/
654	if (!fGuestRelative)
655	{
656	x = 0;
657	w = mGuestXRes;
658	y = 0;
659	h = mGuestYRes;
660	}
661
662	SDL_Rect srcRect;
663	srcRect.x = x;
664	srcRect.y = y + yCutoffGuest;
665	srcRect.w = w;
666	srcRect.h = RT_MAX(0, h - yCutoffGuest);
667
668	/*
669	* Destination rectangle is just offset by the label height.
670	* There are two cases though: label height is added to the
671	* guest resolution (mTopOffset == mLabelHeight; yCutoffGuest == 0)
672	* or the label cuts off a portion of the guest screen (mTopOffset == 0;
673	* yCutoffGuest >= 0)
674	*/
675	SDL_Rect dstRect;
676	dstRect.x = x + mCenterXOffset;
677	dstRect.y = y + yCutoffGuest + mTopOffset + mCenterYOffset;
678	dstRect.w = w;
679	dstRect.h = RT_MAX(0, h - yCutoffGuest);
680
681	/* Calculate the offset within the VRAM to update the streaming texture directly. */
682	uint8_t const pbOff = (uint8_t )mSurfVRAM->pixels
683	+ (srcRect.y * mBytesPerLine) + (srcRect.x * (mBitsPerPixel / 8));
684	SDL_UpdateTexture(mpTexture, &srcRect, pbOff, mSurfVRAM->pitch);
685	SDL_RenderCopy(mpRenderer, mpTexture, NULL, NULL);
686
687	RTCritSectLeave(&mUpdateLock);
688
689	SDL_RenderPresent(mpRenderer);
690	}
691
692	/**
693	* Repaint the whole framebuffer
694	*
695	* @remarks Must be called from the SDL thread!
696	*/
697	void Framebuffer::repaint()
698	{
699	AssertMsg(gSdlNativeThread == RTThreadNativeSelf(), ("Wrong thread! SDL is not threadsafe!\n"));
700	LogFlow(("Framebuffer::repaint\n"));
701	int w, h;
702	uint32_t format;
703	int access;
704	SDL_QueryTexture(mpTexture, &format, &access, &w, &h);
705	update(0, 0, w, h, false /* fGuestRelative */);
706	}
707
708	/**
709	* Toggle fullscreen mode
710	*
711	* @remarks Must be called from the SDL thread!
712	*/
713	void Framebuffer::setFullscreen(bool fFullscreen)
714	{
715	AssertMsg(gSdlNativeThread == RTThreadNativeSelf(), ("Wrong thread! SDL is not threadsafe!\n"));
716	LogFlow(("Framebuffer::SetFullscreen: fullscreen: %d\n", fFullscreen));
717	mfFullscreen = fFullscreen;
718	/* only change the SDL resolution, do not touch the guest framebuffer */
719	resizeSDL();
720	repaint();
721	}
722
723	/**
724	* Return the geometry of the host. This isn't very well tested but it seems
725	* to work at least on Linux hosts.
726	*/
727	void Framebuffer::getFullscreenGeometry(uint32_t width, uint32_t height)
728	{
729	SDL_DisplayMode dm;
730	int rc = SDL_GetDesktopDisplayMode(0, &dm); /** @BUGBUG Handle multi monitor setups! */
731	if (rc == 0)
732	{
733	*width = dm.w;
734	*height = dm.w;
735	}
736	}
737
738	int Framebuffer::setWindowTitle(const char *pcszTitle)
739	{
740	SDL_SetWindowTitle(mpWindow, pcszTitle);
741
742	return VINF_SUCCESS;
743	}

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source: vbox/trunk/src/VBox/Frontends/VBoxBFE/Framebuffer.cpp@ 107044

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