10d2805dbc
We fixed fbCloseScreen to use the FreePixmap function so that the private counts would be updated correctly during CloseScreen. Xvfb calls FreePixmap and sets devPrivate to NULL before fbCloseScreen is called; not checking devPrivate before calling would result in a NULL pointer dereference. Signed-off-by: Keith Packard <keithp@keithp.com> Reviewed-by: Julien Cristau <jcristau@debian.org>
257 lines
8.0 KiB
C
257 lines
8.0 KiB
C
/*
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* Copyright © 1998 Keith Packard
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that
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* copyright notice and this permission notice appear in supporting
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* documentation, and that the name of Keith Packard not be used in
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* advertising or publicity pertaining to distribution of the software without
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* specific, written prior permission. Keith Packard makes no
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* representations about the suitability of this software for any purpose. It
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* is provided "as is" without express or implied warranty.
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*
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* KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifdef HAVE_DIX_CONFIG_H
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#include <dix-config.h>
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#endif
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#include "fb.h"
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Bool
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fbCloseScreen(ScreenPtr pScreen)
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{
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int d;
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DepthPtr depths = pScreen->allowedDepths;
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fbDestroyGlyphCache();
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for (d = 0; d < pScreen->numDepths; d++)
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free(depths[d].vids);
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free(depths);
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free(pScreen->visuals);
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if (pScreen->devPrivate)
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FreePixmap((PixmapPtr)pScreen->devPrivate);
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return TRUE;
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}
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Bool
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fbRealizeFont(ScreenPtr pScreen, FontPtr pFont)
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{
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return TRUE;
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}
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Bool
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fbUnrealizeFont(ScreenPtr pScreen, FontPtr pFont)
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{
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return TRUE;
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}
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void
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fbQueryBestSize(int class,
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unsigned short *width, unsigned short *height,
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ScreenPtr pScreen)
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{
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unsigned short w;
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switch (class) {
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case CursorShape:
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if (*width > pScreen->width)
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*width = pScreen->width;
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if (*height > pScreen->height)
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*height = pScreen->height;
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break;
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case TileShape:
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case StippleShape:
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w = *width;
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if ((w & (w - 1)) && w < FB_UNIT) {
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for (w = 1; w < *width; w <<= 1);
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*width = w;
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}
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}
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}
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PixmapPtr
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_fbGetWindowPixmap(WindowPtr pWindow)
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{
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return fbGetWindowPixmap(pWindow);
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}
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void
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_fbSetWindowPixmap(WindowPtr pWindow, PixmapPtr pPixmap)
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{
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dixSetPrivate(&pWindow->devPrivates, fbGetWinPrivateKey(pWindow), pPixmap);
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}
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Bool
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fbSetupScreen(ScreenPtr pScreen, void *pbits, /* pointer to screen bitmap */
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int xsize, /* in pixels */
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int ysize, int dpix, /* dots per inch */
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int dpiy, int width, /* pixel width of frame buffer */
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int bpp)
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{ /* bits per pixel for screen */
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if (!fbAllocatePrivates(pScreen))
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return FALSE;
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pScreen->defColormap = FakeClientID(0);
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/* let CreateDefColormap do whatever it wants for pixels */
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pScreen->blackPixel = pScreen->whitePixel = (Pixel) 0;
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pScreen->QueryBestSize = fbQueryBestSize;
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/* SaveScreen */
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pScreen->GetImage = fbGetImage;
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pScreen->GetSpans = fbGetSpans;
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pScreen->CreateWindow = fbCreateWindow;
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pScreen->DestroyWindow = fbDestroyWindow;
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pScreen->PositionWindow = fbPositionWindow;
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pScreen->ChangeWindowAttributes = fbChangeWindowAttributes;
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pScreen->RealizeWindow = fbMapWindow;
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pScreen->UnrealizeWindow = fbUnmapWindow;
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pScreen->CopyWindow = fbCopyWindow;
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pScreen->CreatePixmap = fbCreatePixmap;
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pScreen->DestroyPixmap = fbDestroyPixmap;
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pScreen->RealizeFont = fbRealizeFont;
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pScreen->UnrealizeFont = fbUnrealizeFont;
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pScreen->CreateGC = fbCreateGC;
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pScreen->CreateColormap = fbInitializeColormap;
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pScreen->DestroyColormap = (void (*)(ColormapPtr)) NoopDDA;
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pScreen->InstallColormap = fbInstallColormap;
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pScreen->UninstallColormap = fbUninstallColormap;
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pScreen->ListInstalledColormaps = fbListInstalledColormaps;
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pScreen->StoreColors = (void (*)(ColormapPtr, int, xColorItem *)) NoopDDA;
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pScreen->ResolveColor = fbResolveColor;
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pScreen->BitmapToRegion = fbPixmapToRegion;
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pScreen->GetWindowPixmap = _fbGetWindowPixmap;
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pScreen->SetWindowPixmap = _fbSetWindowPixmap;
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return TRUE;
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}
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#ifdef FB_ACCESS_WRAPPER
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Bool
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wfbFinishScreenInit(ScreenPtr pScreen,
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void *pbits,
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int xsize,
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int ysize,
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int dpix,
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int dpiy,
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int width,
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int bpp,
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SetupWrapProcPtr setupWrap, FinishWrapProcPtr finishWrap)
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#else
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Bool
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fbFinishScreenInit(ScreenPtr pScreen,
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void *pbits,
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int xsize, int ysize, int dpix, int dpiy, int width, int bpp)
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#endif
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{
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VisualPtr visuals;
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DepthPtr depths;
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int nvisuals;
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int ndepths;
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int rootdepth;
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VisualID defaultVisual;
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int imagebpp = bpp;
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#ifdef FB_DEBUG
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int stride;
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ysize -= 2;
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stride = (width * bpp) / 8;
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fbSetBits((FbStip *) pbits, stride / sizeof(FbStip), FB_HEAD_BITS);
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pbits = (void *) ((char *) pbits + stride);
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fbSetBits((FbStip *) ((char *) pbits + stride * ysize),
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stride / sizeof(FbStip), FB_TAIL_BITS);
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#endif
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/*
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* By default, a 24bpp screen will use 32bpp images, this avoids
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* problems with many applications which just can't handle packed
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* pixels. If you want real 24bit images, include a 24bpp
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* format in the pixmap formats
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*/
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if (bpp == 24) {
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int f;
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imagebpp = 32;
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/*
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* Check to see if we're advertising a 24bpp image format,
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* in which case windows will use it in preference to a 32 bit
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* format.
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*/
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for (f = 0; f < screenInfo.numPixmapFormats; f++) {
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if (screenInfo.formats[f].bitsPerPixel == 24) {
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imagebpp = 24;
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break;
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}
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}
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}
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if (imagebpp == 32) {
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fbGetScreenPrivate(pScreen)->win32bpp = bpp;
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fbGetScreenPrivate(pScreen)->pix32bpp = bpp;
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}
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else {
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fbGetScreenPrivate(pScreen)->win32bpp = 32;
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fbGetScreenPrivate(pScreen)->pix32bpp = 32;
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}
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#ifdef FB_ACCESS_WRAPPER
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fbGetScreenPrivate(pScreen)->setupWrap = setupWrap;
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fbGetScreenPrivate(pScreen)->finishWrap = finishWrap;
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#endif
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rootdepth = 0;
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if (!fbInitVisuals(&visuals, &depths, &nvisuals, &ndepths, &rootdepth,
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&defaultVisual, ((unsigned long) 1 << (imagebpp - 1)),
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8))
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return FALSE;
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if (!miScreenInit(pScreen, pbits, xsize, ysize, dpix, dpiy, width,
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rootdepth, ndepths, depths,
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defaultVisual, nvisuals, visuals))
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return FALSE;
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/* overwrite miCloseScreen with our own */
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pScreen->CloseScreen = fbCloseScreen;
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if (bpp == 24 && imagebpp == 32) {
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pScreen->ModifyPixmapHeader = fb24_32ModifyPixmapHeader;
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pScreen->CreateScreenResources = fb24_32CreateScreenResources;
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}
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return TRUE;
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}
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/* dts * (inch/dot) * (25.4 mm / inch) = mm */
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#ifdef FB_ACCESS_WRAPPER
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Bool
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wfbScreenInit(ScreenPtr pScreen,
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void *pbits,
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int xsize,
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int ysize,
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int dpix,
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int dpiy,
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int width,
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int bpp, SetupWrapProcPtr setupWrap, FinishWrapProcPtr finishWrap)
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{
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if (!fbSetupScreen(pScreen, pbits, xsize, ysize, dpix, dpiy, width, bpp))
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return FALSE;
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if (!wfbFinishScreenInit(pScreen, pbits, xsize, ysize, dpix, dpiy,
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width, bpp, setupWrap, finishWrap))
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return FALSE;
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return TRUE;
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}
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#else
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Bool
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fbScreenInit(ScreenPtr pScreen,
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void *pbits,
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int xsize, int ysize, int dpix, int dpiy, int width, int bpp)
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{
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if (!fbSetupScreen(pScreen, pbits, xsize, ysize, dpix, dpiy, width, bpp))
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return FALSE;
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if (!fbFinishScreenInit(pScreen, pbits, xsize, ysize, dpix, dpiy,
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width, bpp))
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return FALSE;
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return TRUE;
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}
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#endif
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