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xorg-x11-server
N-VNC-Don-t-let-VNC-access-the-framebuffer-dire...
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File N-VNC-Don-t-let-VNC-access-the-framebuffer-directly-an.patch of Package xorg-x11-server
From: Michal Srb <msrb@suse.cz> Date: Tue, 6 Sep 2011 13:08:25 +0200 Subject: [PATCH 4/6] VNC: Don't let VNC access the framebuffer directly any more. Patch-Mainline: Currently no upstream project. Git-commit: 3e0de1d95b3ffd3988016b2d3f40f577393ad046 Signed-off: Egbert Eich <eich@suse.de> References: bnc #653915 It seems that accessing the framebuffer directly is not a good idea anymore. This patch will let the tight encoding read the screen data using GetImage. It may be little slower, but not dramatically - it already does few GetImage calls on every repaint now. Signed-off-by: Egbert Eich <eich@freedesktop.org> --- hw/vnc/tight.c | 69 ++++++++++++++++++++++++++++++--------------- hw/vnc/vncext.c | 19 ++---------- hw/xfree86/vnc/vncInit.c | 11 ++----- hw/xfree86/vnc/vncint.h | 2 - 4 files changed, 53 insertions(+), 48 deletions(-) diff --git a/hw/vnc/tight.c b/hw/vnc/tight.c index 5c54736..f27c73e 100644 --- a/hw/vnc/tight.c +++ b/hw/vnc/tight.c @@ -109,15 +109,17 @@ static unsigned char *tightAfterBuf = NULL; static int *prevRowBuf = NULL; +static unsigned char* fakeFrameBuffer = NULL; + /* Prototypes for static functions. */ -static void FindBestSolidArea (ScreenPtr pScreen, int x, int y, int w, int h, +static void FindBestSolidArea (rfbClientPtr cl, int x, int y, int w, int h, CARD32 colorValue, int *w_ptr, int *h_ptr); -static void ExtendSolidArea (ScreenPtr pScreen, int x, int y, int w, int h, +static void ExtendSolidArea (rfbClientPtr cl, int x, int y, int w, int h, CARD32 colorValue, int *x_ptr, int *y_ptr, int *w_ptr, int *h_ptr); -static Bool CheckSolidTile (ScreenPtr pScreen, int x, int y, int w, int h, +static Bool CheckSolidTile (rfbClientPtr cl, int x, int y, int w, int h, CARD32 *colorPtr, Bool needSameColor); static Bool CheckSolidTile8 (ScreenPtr pScreen, int x, int y, int w, int h, CARD32 *colorPtr, Bool needSameColor); @@ -126,6 +128,7 @@ static Bool CheckSolidTile16 (ScreenPtr pScreen, int x, int y, int w, int h, static Bool CheckSolidTile32 (ScreenPtr pScreen, int x, int y, int w, int h, CARD32 *colorPtr, Bool needSameColor); +static Bool SendRectEncodingTight(rfbClientPtr cl, int x, int y, int w, int h); static Bool SendRectSimple (rfbClientPtr cl, int x, int y, int w, int h); static Bool SendSubrect (rfbClientPtr cl, int x, int y, int w, int h); static Bool SendTightHeader (rfbClientPtr cl, int x, int y, int w, int h); @@ -211,6 +214,25 @@ rfbSendRectEncodingTight(rfbClientPtr cl, int x, int y, int w, int h) { VNCSCREENPTR(cl->pScreen); + + /* Copy the rectangle to the fake buffer for CheckSolidTile functions. */ + + if(!fakeFrameBuffer) fakeFrameBuffer = malloc(pVNC->width * pVNC->height * cl->format.bitsPerPixel / 8); + (*cl->translateFn)(cl->pScreen, cl->translateLookupTable, + &pVNC->rfbServerFormat, + &cl->format, fakeFrameBuffer + (y * pVNC->width * cl->format.bitsPerPixel / 8), + pVNC->paddedWidthInBytes, pVNC->width, h, 0, y); + + /* Call the inner part */ + + return SendRectEncodingTight(cl, x, y, w, h); +} + +static Bool +SendRectEncodingTight(rfbClientPtr cl, + int x, int y, int w, int h) +{ + VNCSCREENPTR(cl->pScreen); int nMaxRows; CARD32 colorValue; int dx, dy, dw, dh; @@ -247,7 +269,7 @@ rfbSendRectEncodingTight(rfbClientPtr cl, nMaxWidth = (w > maxRectWidth) ? maxRectWidth : w; nMaxRows = maxRectSize / nMaxWidth; } - + /* Try to find large solid-color areas and send them separately. */ for (dy = y; dy < y + h; dy += MAX_SPLIT_TILE_SIZE) { @@ -269,11 +291,11 @@ rfbSendRectEncodingTight(rfbClientPtr cl, dw = (dx + MAX_SPLIT_TILE_SIZE <= x + w) ? MAX_SPLIT_TILE_SIZE : (x + w - dx); - if (CheckSolidTile(cl->pScreen, dx, dy, dw, dh, &colorValue, FALSE)) { + if (CheckSolidTile(cl, dx, dy, dw, dh, &colorValue, FALSE)) { /* Get dimensions of solid-color area. */ - FindBestSolidArea(cl->pScreen, dx, dy, w - (dx - x), h - (dy - y), + FindBestSolidArea(cl, dx, dy, w - (dx - x), h - (dy - y), colorValue, &w_best, &h_best); /* Make sure a solid rectangle is large enough @@ -286,7 +308,7 @@ rfbSendRectEncodingTight(rfbClientPtr cl, /* Try to extend solid rectangle to maximum size. */ x_best = dx; y_best = dy; - ExtendSolidArea(cl->pScreen, x, y, w, h, colorValue, + ExtendSolidArea(cl, x, y, w, h, colorValue, &x_best, &y_best, &w_best, &h_best); /* Send rectangles at top and left to solid-color area. */ @@ -295,7 +317,7 @@ rfbSendRectEncodingTight(rfbClientPtr cl, !SendRectSimple(cl, x, y, w, y_best-y) ) return FALSE; if ( x_best != x && - !rfbSendRectEncodingTight(cl, x, y_best, + !SendRectEncodingTight(cl, x, y_best, x_best-x, h_best) ) return FALSE; @@ -316,11 +338,11 @@ rfbSendRectEncodingTight(rfbClientPtr cl, /* Send remaining rectangles (at right and bottom). */ if ( x_best + w_best != x + w && - !rfbSendRectEncodingTight(cl, x_best+w_best, y_best, + !SendRectEncodingTight(cl, x_best+w_best, y_best, w-(x_best-x)-w_best, h_best) ) return FALSE; if ( y_best + h_best != y + h && - !rfbSendRectEncodingTight(cl, x, y_best+h_best, + !SendRectEncodingTight(cl, x, y_best+h_best, w, h-(y_best-y)-h_best) ) return FALSE; @@ -339,7 +361,7 @@ rfbSendRectEncodingTight(rfbClientPtr cl, } static void -FindBestSolidArea(ScreenPtr pScreen, +FindBestSolidArea(rfbClientPtr cl, int x, int y, int w, int h, CARD32 colorValue, int *w_ptr, int *h_ptr) @@ -357,13 +379,13 @@ FindBestSolidArea(ScreenPtr pScreen, dw = (w_prev > MAX_SPLIT_TILE_SIZE) ? MAX_SPLIT_TILE_SIZE : w_prev; - if (!CheckSolidTile(pScreen, x, dy, dw, dh, &colorValue, TRUE)) + if (!CheckSolidTile(cl, x, dy, dw, dh, &colorValue, TRUE)) break; for (dx = x + dw; dx < x + w_prev;) { dw = (dx + MAX_SPLIT_TILE_SIZE <= x + w_prev) ? MAX_SPLIT_TILE_SIZE : (x + w_prev - dx); - if (!CheckSolidTile(pScreen, dx, dy, dw, dh, &colorValue, TRUE)) + if (!CheckSolidTile(cl, dx, dy, dw, dh, &colorValue, TRUE)) break; dx += dw; } @@ -380,7 +402,7 @@ FindBestSolidArea(ScreenPtr pScreen, } static void -ExtendSolidArea(ScreenPtr pScreen, int x, int y, int w, int h, +ExtendSolidArea(rfbClientPtr cl, int x, int y, int w, int h, CARD32 colorValue, int *x_ptr, int *y_ptr, int *w_ptr, int *h_ptr) { @@ -388,7 +410,7 @@ ExtendSolidArea(ScreenPtr pScreen, int x, int y, int w, int h, /* Try to extend the area upwards. */ for ( cy = *y_ptr - 1; - cy >= y && CheckSolidTile(pScreen, *x_ptr, cy, *w_ptr, 1, &colorValue, TRUE); + cy >= y && CheckSolidTile(cl, *x_ptr, cy, *w_ptr, 1, &colorValue, TRUE); cy-- ); *h_ptr += *y_ptr - (cy + 1); *y_ptr = cy + 1; @@ -396,13 +418,13 @@ ExtendSolidArea(ScreenPtr pScreen, int x, int y, int w, int h, /* ... downwards. */ for ( cy = *y_ptr + *h_ptr; cy < y + h && - CheckSolidTile(pScreen, *x_ptr, cy, *w_ptr, 1, &colorValue, TRUE); + CheckSolidTile(cl, *x_ptr, cy, *w_ptr, 1, &colorValue, TRUE); cy++ ); *h_ptr += cy - (*y_ptr + *h_ptr); /* ... to the left. */ for ( cx = *x_ptr - 1; - cx >= x && CheckSolidTile(pScreen, cx, *y_ptr, 1, *h_ptr, &colorValue, TRUE); + cx >= x && CheckSolidTile(cl, cx, *y_ptr, 1, *h_ptr, &colorValue, TRUE); cx-- ); *w_ptr += *x_ptr - (cx + 1); *x_ptr = cx + 1; @@ -410,7 +432,7 @@ ExtendSolidArea(ScreenPtr pScreen, int x, int y, int w, int h, /* ... to the right. */ for ( cx = *x_ptr + *w_ptr; cx < x + w && - CheckSolidTile(pScreen, cx, *y_ptr, 1, *h_ptr, &colorValue, TRUE); + CheckSolidTile(cl, cx, *y_ptr, 1, *h_ptr, &colorValue, TRUE); cx++ ); *w_ptr += cx - (*x_ptr + *w_ptr); } @@ -423,11 +445,12 @@ ExtendSolidArea(ScreenPtr pScreen, int x, int y, int w, int h, */ static Bool -CheckSolidTile(ScreenPtr pScreen, int x, int y, int w, int h, CARD32 *colorPtr, +CheckSolidTile(rfbClientPtr cl, int x, int y, int w, int h, CARD32 *colorPtr, Bool needSameColor) { - VNCSCREENPTR(pScreen); - switch(pVNC->rfbServerFormat.bitsPerPixel) { + ScreenPtr pScreen = cl->pScreen; + + switch(cl->format.bitsPerPixel) { case 32: return CheckSolidTile32(pScreen, x, y, w, h, colorPtr, needSameColor); case 16: @@ -449,7 +472,7 @@ static Bool \ int dx, dy; \ \ fbptr = (CARD##bpp *) \ - &pVNC->pfbMemory[y * pVNC->paddedWidthInBytes + x * (bpp/8)]; \ + &fakeFrameBuffer[(y * pVNC->width + x) * (bpp/8)]; \ \ colorValue = *fbptr; \ if (needSameColor && (CARD32)colorValue != *colorPtr) \ @@ -460,7 +483,7 @@ static Bool \ if (colorValue != fbptr[dx]) \ return FALSE; \ } \ - fbptr = (CARD##bpp *)((CARD8 *)fbptr + pVNC->paddedWidthInBytes); \ + fbptr = (CARD##bpp *)((CARD8 *)fbptr + pVNC->width * (bpp/8)); \ } \ \ *colorPtr = (CARD32)colorValue; \ diff --git a/hw/vnc/vncext.c b/hw/vnc/vncext.c index ea913b7..534f3f5 100644 --- a/hw/vnc/vncext.c +++ b/hw/vnc/vncext.c @@ -702,15 +702,7 @@ CreateResourceTypes(void) static unsigned long vncExtGeneration = 0; #if XFREE86VNC -extern Bool VNCInit(ScreenPtr pScreen, unsigned char *FBStart); - -/* copied from miscrinit.c */ -typedef struct -{ - pointer pbits; /* pointer to framebuffer */ - int width; /* delta to add to a framebuffer addr to move one row down */ -} miScreenInitParmsRec, *miScreenInitParmsPtr; - +extern Bool VNCInit(ScreenPtr pScreen); static Bool vncCreateScreenResources(ScreenPtr pScreen) @@ -719,9 +711,6 @@ vncCreateScreenResources(ScreenPtr pScreen) CreateScreenResourcesProcPtr CreateScreenResources = (CreateScreenResourcesProcPtr) dixLookupPrivate(&pScreen->devPrivates, vncCreateScreenResourcesKey); - miScreenInitParmsPtr pScrInitParms; - - pScrInitParms = (miScreenInitParmsPtr)pScreen->devPrivate; if ( pScreen->CreateScreenResources != vncCreateScreenResources ) { /* Can't find hook we are hung on */ @@ -732,9 +721,6 @@ vncCreateScreenResources(ScreenPtr pScreen) (void *) pScreen->CreateScreenResources ); } - /* Now do our stuff */ - VNCInit(pScreen, pScrInitParms->pbits); - /* Unhook this function ... */ pScreen->CreateScreenResources = CreateScreenResources; dixSetPrivate(&pScreen->devPrivates, vncCreateScreenResourcesKey, NULL); @@ -744,6 +730,9 @@ vncCreateScreenResources(ScreenPtr pScreen) ret = (*pScreen->CreateScreenResources)(pScreen); } + /* Now do our stuff */ + VNCInit(pScreen); + #ifdef DEBUG ErrorF("vncCreateScreenResources() returns %d\n", ret); #endif diff --git a/hw/xfree86/vnc/vncInit.c b/hw/xfree86/vnc/vncInit.c index 4a124fb..8b2fa5f 100644 --- a/hw/xfree86/vnc/vncInit.c +++ b/hw/xfree86/vnc/vncInit.c @@ -49,7 +49,7 @@ extern void VncExtensionInit(void); extern void vncInitMouse(void); extern void vncInitKeyb(void); -Bool VNCInit(ScreenPtr pScreen, unsigned char *FBStart); +Bool VNCInit(ScreenPtr pScreen); #ifndef XFree86LOADER static unsigned long VNCGeneration = 0; @@ -151,7 +151,7 @@ void rfbLogPerror(char *str) * Called by vncCreateScreenResources() */ Bool -VNCInit(ScreenPtr pScreen, unsigned char *FBStart) +VNCInit(ScreenPtr pScreen) { ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum]; VisualPtr visual; @@ -164,9 +164,6 @@ VNCInit(ScreenPtr pScreen, unsigned char *FBStart) PictureScreenPtr ps; #endif - if (!FBStart) - return FALSE; - #ifndef XFree86LOADER if (VNCGeneration != serverGeneration) { VncExtensionInit(); @@ -287,9 +284,7 @@ VNCInit(ScreenPtr pScreen, unsigned char *FBStart) pScreenPriv->depth = pScrn->depth; pScreenPriv->paddedWidthInBytes = PixmapBytePad(pScrn->displayWidth, pScrn->depth); pScreenPriv->bitsPerPixel = rfbBitsPerPixel(pScrn->depth); - pScreenPriv->pfbMemory = FBStart; - pScreenPriv->oldpfbMemory = FBStart; - + pScreenPriv->cursorIsDrawn = TRUE; pScreenPriv->dontSendFramebufferUpdate = FALSE; diff --git a/hw/xfree86/vnc/vncint.h b/hw/xfree86/vnc/vncint.h index 18a3630..9e4a36f 100644 --- a/hw/xfree86/vnc/vncint.h +++ b/hw/xfree86/vnc/vncint.h @@ -44,13 +44,11 @@ typedef struct { size_t buf_filled; int maxFd; fd_set allFds; - unsigned char * oldpfbMemory; Bool rfbAlwaysShared; Bool rfbNeverShared; Bool rfbDontDisconnect; Bool rfbUserAccept; Bool rfbViewOnly; - unsigned char * pfbMemory; int paddedWidthInBytes; ColormapPtr rfbInstalledColormap; ColormapPtr savedColormap; -- 1.7.3.4
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