b902c8abb6
Xnest variant of ModifyPixmapHeader that creates new Pixmap in parent X server if it's size is modified from 0x0 to anything bigger. xnestCreatePixmap doesn't create pixmap in parent X server if it has dimensions 0x0. If it is later resized and accessed, Xnest will be aborted with BadDrawable error from parent X server because it will use XID 0. This happens with ScratchPixmap, for example as used from XaceCensorImage. Applications using XACE crash Xnest. Reviewed-by: Adam Jackson <ajax@redhat.com>
427 lines
14 KiB
C
427 lines
14 KiB
C
/*
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Copyright 1993 by Davor Matic
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Permission to use, copy, modify, distribute, and sell this software
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and its documentation for any purpose is hereby granted without fee,
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provided that the above copyright notice appear in all copies and that
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both that copyright notice and this permission notice appear in
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supporting documentation. Davor Matic makes no representations about
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the suitability of this software for any purpose. It is provided "as
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is" without express or implied warranty.
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*/
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#ifdef HAVE_XNEST_CONFIG_H
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#include <xnest-config.h>
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#endif
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#include <X11/X.h>
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#include <X11/Xproto.h>
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#include "scrnintstr.h"
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#include "dix.h"
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#include "mi.h"
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#include "micmap.h"
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#include "colormapst.h"
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#include "resource.h"
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#include "Xnest.h"
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#include "Display.h"
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#include "Screen.h"
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#include "XNGC.h"
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#include "GCOps.h"
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#include "Drawable.h"
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#include "XNFont.h"
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#include "Color.h"
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#include "XNCursor.h"
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#include "Visual.h"
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#include "Events.h"
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#include "Init.h"
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#include "mipointer.h"
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#include "Args.h"
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#include "mipointrst.h"
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Window xnestDefaultWindows[MAXSCREENS];
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Window xnestScreenSaverWindows[MAXSCREENS];
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DevPrivateKeyRec xnestCursorScreenKeyRec;
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ScreenPtr
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xnestScreen(Window window)
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{
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int i;
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for (i = 0; i < xnestNumScreens; i++)
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if (xnestDefaultWindows[i] == window)
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return screenInfo.screens[i];
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return NULL;
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}
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static int
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offset(unsigned long mask)
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{
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int count;
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for (count = 0; !(mask & 1) && count < 32; count++)
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mask >>= 1;
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return count;
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}
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static Bool
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xnestSaveScreen(ScreenPtr pScreen, int what)
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{
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if (xnestSoftwareScreenSaver)
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return False;
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else {
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switch (what) {
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case SCREEN_SAVER_ON:
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XMapRaised(xnestDisplay, xnestScreenSaverWindows[pScreen->myNum]);
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xnestSetScreenSaverColormapWindow(pScreen);
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break;
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case SCREEN_SAVER_OFF:
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XUnmapWindow(xnestDisplay, xnestScreenSaverWindows[pScreen->myNum]);
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xnestSetInstalledColormapWindows(pScreen);
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break;
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case SCREEN_SAVER_FORCER:
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lastEventTime = GetTimeInMillis();
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XUnmapWindow(xnestDisplay, xnestScreenSaverWindows[pScreen->myNum]);
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xnestSetInstalledColormapWindows(pScreen);
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break;
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case SCREEN_SAVER_CYCLE:
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XUnmapWindow(xnestDisplay, xnestScreenSaverWindows[pScreen->myNum]);
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xnestSetInstalledColormapWindows(pScreen);
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break;
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}
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return True;
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}
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}
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static Bool
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xnestCursorOffScreen(ScreenPtr *ppScreen, int *x, int *y)
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{
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return FALSE;
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}
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static void
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xnestCrossScreen(ScreenPtr pScreen, Bool entering)
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{
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}
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static miPointerScreenFuncRec xnestPointerCursorFuncs = {
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xnestCursorOffScreen,
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xnestCrossScreen,
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miPointerWarpCursor
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};
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static miPointerSpriteFuncRec xnestPointerSpriteFuncs = {
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xnestRealizeCursor,
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xnestUnrealizeCursor,
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xnestSetCursor,
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xnestMoveCursor,
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xnestDeviceCursorInitialize,
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xnestDeviceCursorCleanup
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};
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Bool
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xnestOpenScreen(ScreenPtr pScreen, int argc, char *argv[])
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{
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VisualPtr visuals;
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DepthPtr depths;
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int numVisuals, numDepths;
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int i, j, depthIndex;
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unsigned long valuemask;
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XSetWindowAttributes attributes;
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XWindowAttributes gattributes;
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XSizeHints sizeHints;
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VisualID defaultVisual;
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int rootDepth;
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miPointerScreenPtr PointPriv;
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if (!dixRegisterPrivateKey
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(&xnestWindowPrivateKeyRec, PRIVATE_WINDOW, sizeof(xnestPrivWin)))
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return FALSE;
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if (!dixRegisterPrivateKey
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(&xnestGCPrivateKeyRec, PRIVATE_GC, sizeof(xnestPrivGC)))
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return FALSE;
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if (!dixRegisterPrivateKey
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(&xnestPixmapPrivateKeyRec, PRIVATE_PIXMAP, sizeof(xnestPrivPixmap)))
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return FALSE;
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if (!dixRegisterPrivateKey
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(&xnestColormapPrivateKeyRec, PRIVATE_COLORMAP,
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sizeof(xnestPrivColormap)))
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return FALSE;
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if (!dixRegisterPrivateKey(&xnestCursorScreenKeyRec, PRIVATE_SCREEN, 0))
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return FALSE;
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visuals = (VisualPtr) malloc(xnestNumVisuals * sizeof(VisualRec));
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numVisuals = 0;
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depths = (DepthPtr) malloc(MAXDEPTH * sizeof(DepthRec));
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depths[0].depth = 1;
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depths[0].numVids = 0;
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depths[0].vids = (VisualID *) malloc(MAXVISUALSPERDEPTH * sizeof(VisualID));
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numDepths = 1;
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for (i = 0; i < xnestNumVisuals; i++) {
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visuals[numVisuals].class = xnestVisuals[i].class;
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visuals[numVisuals].bitsPerRGBValue = xnestVisuals[i].bits_per_rgb;
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visuals[numVisuals].ColormapEntries = xnestVisuals[i].colormap_size;
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visuals[numVisuals].nplanes = xnestVisuals[i].depth;
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visuals[numVisuals].redMask = xnestVisuals[i].red_mask;
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visuals[numVisuals].greenMask = xnestVisuals[i].green_mask;
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visuals[numVisuals].blueMask = xnestVisuals[i].blue_mask;
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visuals[numVisuals].offsetRed = offset(xnestVisuals[i].red_mask);
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visuals[numVisuals].offsetGreen = offset(xnestVisuals[i].green_mask);
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visuals[numVisuals].offsetBlue = offset(xnestVisuals[i].blue_mask);
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/* Check for and remove duplicates. */
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for (j = 0; j < numVisuals; j++) {
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if (visuals[numVisuals].class == visuals[j].class &&
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visuals[numVisuals].bitsPerRGBValue ==
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visuals[j].bitsPerRGBValue &&
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visuals[numVisuals].ColormapEntries ==
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visuals[j].ColormapEntries &&
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visuals[numVisuals].nplanes == visuals[j].nplanes &&
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visuals[numVisuals].redMask == visuals[j].redMask &&
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visuals[numVisuals].greenMask == visuals[j].greenMask &&
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visuals[numVisuals].blueMask == visuals[j].blueMask &&
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visuals[numVisuals].offsetRed == visuals[j].offsetRed &&
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visuals[numVisuals].offsetGreen == visuals[j].offsetGreen &&
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visuals[numVisuals].offsetBlue == visuals[j].offsetBlue)
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break;
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}
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if (j < numVisuals)
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break;
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visuals[numVisuals].vid = FakeClientID(0);
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depthIndex = UNDEFINED;
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for (j = 0; j < numDepths; j++)
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if (depths[j].depth == xnestVisuals[i].depth) {
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depthIndex = j;
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break;
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}
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if (depthIndex == UNDEFINED) {
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depthIndex = numDepths;
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depths[depthIndex].depth = xnestVisuals[i].depth;
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depths[depthIndex].numVids = 0;
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depths[depthIndex].vids =
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(VisualID *) malloc(MAXVISUALSPERDEPTH * sizeof(VisualID));
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numDepths++;
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}
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if (depths[depthIndex].numVids >= MAXVISUALSPERDEPTH) {
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FatalError("Visual table overflow");
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}
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depths[depthIndex].vids[depths[depthIndex].numVids] =
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visuals[numVisuals].vid;
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depths[depthIndex].numVids++;
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numVisuals++;
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}
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visuals = (VisualPtr) realloc(visuals, numVisuals * sizeof(VisualRec));
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defaultVisual = visuals[xnestDefaultVisualIndex].vid;
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rootDepth = visuals[xnestDefaultVisualIndex].nplanes;
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if (xnestParentWindow != 0) {
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XGetWindowAttributes(xnestDisplay, xnestParentWindow, &gattributes);
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xnestWidth = gattributes.width;
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xnestHeight = gattributes.height;
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}
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/* myNum */
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/* id */
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miScreenInit(pScreen, NULL, xnestWidth, xnestHeight, 1, 1, xnestWidth, rootDepth, numDepths, depths, defaultVisual, /* root visual */
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numVisuals, visuals);
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pScreen->defColormap = (Colormap) FakeClientID(0);
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pScreen->minInstalledCmaps = MINCMAPS;
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pScreen->maxInstalledCmaps = MAXCMAPS;
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pScreen->backingStoreSupport = NotUseful;
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pScreen->saveUnderSupport = NotUseful;
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pScreen->whitePixel = xnestWhitePixel;
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pScreen->blackPixel = xnestBlackPixel;
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/* GCperDepth */
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/* PixmapPerDepth */
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pScreen->devPrivate = NULL;
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/* WindowPrivateLen */
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/* WindowPrivateSizes */
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/* totalWindowSize */
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/* GCPrivateLen */
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/* GCPrivateSizes */
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/* totalGCSize */
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/* Random screen procedures */
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pScreen->QueryBestSize = xnestQueryBestSize;
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pScreen->SaveScreen = xnestSaveScreen;
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pScreen->GetImage = xnestGetImage;
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pScreen->GetSpans = xnestGetSpans;
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pScreen->SourceValidate = NULL;
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/* Window Procedures */
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pScreen->CreateWindow = xnestCreateWindow;
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pScreen->DestroyWindow = xnestDestroyWindow;
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pScreen->PositionWindow = xnestPositionWindow;
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pScreen->ChangeWindowAttributes = xnestChangeWindowAttributes;
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pScreen->RealizeWindow = xnestRealizeWindow;
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pScreen->UnrealizeWindow = xnestUnrealizeWindow;
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pScreen->PostValidateTree = NULL;
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pScreen->WindowExposures = xnestWindowExposures;
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pScreen->CopyWindow = xnestCopyWindow;
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pScreen->ClipNotify = xnestClipNotify;
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/* Pixmap procedures */
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pScreen->CreatePixmap = xnestCreatePixmap;
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pScreen->DestroyPixmap = xnestDestroyPixmap;
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pScreen->ModifyPixmapHeader = xnestModifyPixmapHeader;
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/* Font procedures */
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pScreen->RealizeFont = xnestRealizeFont;
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pScreen->UnrealizeFont = xnestUnrealizeFont;
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/* GC procedures */
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pScreen->CreateGC = xnestCreateGC;
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/* Colormap procedures */
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pScreen->CreateColormap = xnestCreateColormap;
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pScreen->DestroyColormap = xnestDestroyColormap;
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pScreen->InstallColormap = xnestInstallColormap;
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pScreen->UninstallColormap = xnestUninstallColormap;
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pScreen->ListInstalledColormaps = xnestListInstalledColormaps;
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pScreen->StoreColors = xnestStoreColors;
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pScreen->ResolveColor = xnestResolveColor;
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pScreen->BitmapToRegion = xnestPixmapToRegion;
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/* OS layer procedures */
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pScreen->BlockHandler = (ScreenBlockHandlerProcPtr) NoopDDA;
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pScreen->WakeupHandler = (ScreenWakeupHandlerProcPtr) NoopDDA;
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miDCInitialize(pScreen, &xnestPointerCursorFuncs); /* init SW rendering */
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PointPriv = dixLookupPrivate(&pScreen->devPrivates, miPointerScreenKey);
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xnestCursorFuncs.spriteFuncs = PointPriv->spriteFuncs;
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dixSetPrivate(&pScreen->devPrivates, xnestCursorScreenKey,
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&xnestCursorFuncs);
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PointPriv->spriteFuncs = &xnestPointerSpriteFuncs;
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pScreen->mmWidth = xnestWidth * DisplayWidthMM(xnestDisplay,
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DefaultScreen(xnestDisplay))
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/ DisplayWidth(xnestDisplay, DefaultScreen(xnestDisplay));
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pScreen->mmHeight =
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xnestHeight * DisplayHeightMM(xnestDisplay,
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DefaultScreen(xnestDisplay)) /
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DisplayHeight(xnestDisplay, DefaultScreen(xnestDisplay));
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/* overwrite miCloseScreen with our own */
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pScreen->CloseScreen = xnestCloseScreen;
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if (!miScreenDevPrivateInit(pScreen, xnestWidth, NULL))
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return FALSE;
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/* overwrite miSetShape with our own */
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pScreen->SetShape = xnestSetShape;
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/* devPrivates */
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#define POSITION_OFFSET (pScreen->myNum * (xnestWidth + xnestHeight) / 32)
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if (xnestDoFullGeneration) {
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valuemask = CWBackPixel | CWEventMask | CWColormap;
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attributes.background_pixel = xnestWhitePixel;
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attributes.event_mask = xnestEventMask;
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attributes.colormap =
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xnestDefaultVisualColormap(xnestDefaultVisual(pScreen));
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if (xnestParentWindow != 0) {
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xnestDefaultWindows[pScreen->myNum] = xnestParentWindow;
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XSelectInput(xnestDisplay, xnestDefaultWindows[pScreen->myNum],
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xnestEventMask);
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}
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else
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xnestDefaultWindows[pScreen->myNum] =
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XCreateWindow(xnestDisplay,
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DefaultRootWindow(xnestDisplay),
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xnestX + POSITION_OFFSET,
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xnestY + POSITION_OFFSET,
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xnestWidth, xnestHeight,
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xnestBorderWidth,
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pScreen->rootDepth,
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InputOutput,
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xnestDefaultVisual(pScreen),
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valuemask, &attributes);
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if (!xnestWindowName)
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xnestWindowName = argv[0];
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sizeHints.flags = PPosition | PSize | PMaxSize;
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sizeHints.x = xnestX + POSITION_OFFSET;
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sizeHints.y = xnestY + POSITION_OFFSET;
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sizeHints.width = sizeHints.max_width = xnestWidth;
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sizeHints.height = sizeHints.max_height = xnestHeight;
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if (xnestUserGeometry & XValue || xnestUserGeometry & YValue)
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sizeHints.flags |= USPosition;
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if (xnestUserGeometry & WidthValue || xnestUserGeometry & HeightValue)
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sizeHints.flags |= USSize;
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XSetStandardProperties(xnestDisplay,
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xnestDefaultWindows[pScreen->myNum],
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xnestWindowName,
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xnestWindowName,
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xnestIconBitmap, argv, argc, &sizeHints);
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XMapWindow(xnestDisplay, xnestDefaultWindows[pScreen->myNum]);
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valuemask = CWBackPixmap | CWColormap;
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attributes.background_pixmap = xnestScreenSaverPixmap;
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attributes.colormap =
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DefaultColormap(xnestDisplay, DefaultScreen(xnestDisplay));
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xnestScreenSaverWindows[pScreen->myNum] =
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XCreateWindow(xnestDisplay,
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xnestDefaultWindows[pScreen->myNum],
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0, 0, xnestWidth, xnestHeight, 0,
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DefaultDepth(xnestDisplay,
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DefaultScreen(xnestDisplay)),
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InputOutput, DefaultVisual(xnestDisplay,
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DefaultScreen
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(xnestDisplay)), valuemask,
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&attributes);
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}
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if (!xnestCreateDefaultColormap(pScreen))
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return False;
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return True;
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}
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Bool
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xnestCloseScreen(ScreenPtr pScreen)
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{
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int i;
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for (i = 0; i < pScreen->numDepths; i++)
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free(pScreen->allowedDepths[i].vids);
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free(pScreen->allowedDepths);
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free(pScreen->visuals);
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free(pScreen->devPrivate);
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/*
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If xnestDoFullGeneration all x resources will be destroyed upon closing
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the display connection. There is no need to generate extra protocol.
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*/
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return True;
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}
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