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dix: Add hybrid full-size/empty-clip mode to SetRootClip 

216bdbc735 removed the SetRootClip call in the XWayland output-hotplug
handler when running rootless (e.g. as a part of Weston/Mutter), since
the root window has no storage, so generating exposures will result in
writes to invalid memory.

Unfortunately, preventing the segfault also breaks sprite confinement.
SetRootClip updates winSize and borderSize for the root window, which
when combined with RRScreenSizeChanged calling ScreenRestructured,
generates a new sprite-confinment area to update it to the whole screen.

Removing this call results in the window geometry being reported
correctly, but winSize/borderSize never changing from their values at
startup, i.e. out of sync with the root window geometry / screen
information in the connection info / XRandR.

This patch introduces a hybrid mode, where we update winSize and
borderSize for the root window, enabling sprite confinement to work
correctly, but keep the clip emptied so exposures are never generated.

Signed-off-by: Daniel Stone <daniels@collabora.com>
Tested-by: Olivier Fourdan <ofourdan@redhat.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
This commit is contained in:
Daniel Stone 2016-02-12 16:36:59 +00:00 committed by Adam Jackson
parent dbe8d03c42
commit e957a2e5dd
15 changed files with 59 additions and 35 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

32
dix/window.c
View File

@ -3647,7 +3647,7 @@ WindowParentHasDeviceCursor(WindowPtr pWin,
* all of the windows
*/
void
SetRootClip(ScreenPtr pScreen, Bool enable)
SetRootClip(ScreenPtr pScreen, int enable)
{
WindowPtr pWin = pScreen->root;
WindowPtr pChild;
@ -3655,6 +3655,7 @@ SetRootClip(ScreenPtr pScreen, Bool enable)
Bool anyMarked = FALSE;
WindowPtr pLayerWin;
BoxRec box;
enum RootClipMode mode = enable;
if (!pWin)
return;
@ -3679,23 +3680,32 @@ SetRootClip(ScreenPtr pScreen, Bool enable)
}
}
/*
* Use REGION_BREAK to avoid optimizations in ValidateTree
* that assume the root borderClip can't change well, normally
* it doesn't...)
*/
if (enable) {
if (mode != ROOT_CLIP_NONE) {
pWin->drawable.width = pScreen->width;
pWin->drawable.height = pScreen->height;
box.x1 = 0;
box.y1 = 0;
box.x2 = pScreen->width;
box.y2 = pScreen->height;
RegionInit(&pWin->winSize, &box, 1);
RegionInit(&pWin->borderSize, &box, 1);
if (WasViewable)
RegionReset(&pWin->borderClip, &box);
pWin->drawable.width = pScreen->width;
pWin->drawable.height = pScreen->height;
/*
* Use REGION_BREAK to avoid optimizations in ValidateTree
* that assume the root borderClip can't change well, normally
* it doesn't...)
*/
RegionBreak(&pWin->clipList);
/* For INPUT_ONLY, empty the borderClip so no rendering will ever
* be attempted to the screen pixmap (only redirected windows),
* but we keep borderSize as full regardless. */
if (WasViewable && mode == ROOT_CLIP_FULL)
RegionReset(&pWin->borderClip, &box);
else
RegionEmpty(&pWin->borderClip);
}
else {
RegionEmpty(&pWin->borderClip);

4
hw/kdrive/src/kdrive.c
View File

@ -99,7 +99,7 @@ KdDisableScreen(ScreenPtr pScreen)
if (!pScreenPriv->enabled)
return;
if (!pScreenPriv->closed)
SetRootClip(pScreen, FALSE);
SetRootClip(pScreen, ROOT_CLIP_NONE);
KdDisableColormap(pScreen);
if (!pScreenPriv->screen->dumb && pScreenPriv->card->cfuncs->disableAccel)
(*pScreenPriv->card->cfuncs->disableAccel) (pScreen);
@ -182,7 +182,7 @@ KdEnableScreen(ScreenPtr pScreen)
if (!pScreenPriv->screen->dumb && pScreenPriv->card->cfuncs->enableAccel)
(*pScreenPriv->card->cfuncs->enableAccel) (pScreen);
KdEnableColormap(pScreen);
SetRootClip(pScreen, TRUE);
SetRootClip(pScreen, ROOT_CLIP_FULL);
if (pScreenPriv->card->cfuncs->dpms)
(*pScreenPriv->card->cfuncs->dpms) (pScreen, pScreenPriv->dpmsState);
return TRUE;

4
hw/vfb/InitOutput.c
View File

@ -763,7 +763,7 @@ vfbRRScreenSetSize(ScreenPtr pScreen,
CARD32 mmHeight)
{
// Prevent screen updates while we change things around
SetRootClip(pScreen, FALSE);
SetRootClip(pScreen, ROOT_CLIP_NONE);
pScreen->width = width;
pScreen->height = height;
@ -771,7 +771,7 @@ vfbRRScreenSetSize(ScreenPtr pScreen,
pScreen->mmHeight = mmHeight;
// Restore the ability to update screen, now with new dimensions
SetRootClip(pScreen, TRUE);
SetRootClip(pScreen, ROOT_CLIP_FULL);
RRScreenSizeNotify (pScreen);
RRTellChanged(pScreen);

4
hw/xfree86/common/xf86Helper.c
View File

@ -1076,14 +1076,14 @@ xf86EnableDisableFBAccess(ScrnInfoPtr pScrnInfo, Bool enable)
* Restore all of the clip lists on the screen
*/
if (!xf86Resetting)
SetRootClip(pScreen, TRUE);
SetRootClip(pScreen, ROOT_CLIP_FULL);
}
else {
/*
* Empty all of the clip lists on the screen
*/
SetRootClip(pScreen, FALSE);
SetRootClip(pScreen, ROOT_CLIP_NONE);
}
}

4
hw/xfree86/modes/xf86RandR12.c
View File

@ -1848,13 +1848,13 @@ xf86RandR14ProviderSetOutputSource(ScreenPtr pScreen,
if (provider->output_source == source_provider)
return TRUE;
SetRootClip(source_provider->pScreen, FALSE);
SetRootClip(source_provider->pScreen, ROOT_CLIP_NONE);
DetachUnboundGPU(pScreen);
AttachOutputGPU(source_provider->pScreen, pScreen);
provider->output_source = source_provider;
SetRootClip(source_provider->pScreen, TRUE);
SetRootClip(source_provider->pScreen, ROOT_CLIP_FULL);
return TRUE;
}

2
hw/xquartz/darwinEvents.c
View File

@ -275,7 +275,7 @@ DarwinEventHandler(int screenNum, InternalEvent *ie, DeviceIntPtr dev)
break;
case kXquartzSetRootClip:
QuartzSetRootClip((Bool)e->data[0]);
QuartzSetRootClip(e->data[0]);
break;
case kXquartzQuit:

4
hw/xquartz/quartz.c
View File

@ -485,7 +485,7 @@ QuartzHide(void)
* Enable or disable rendering to the X screen.
*/
void
QuartzSetRootClip(BOOL enable)
QuartzSetRootClip(int mode)
{
int i;
@ -494,7 +494,7 @@ QuartzSetRootClip(BOOL enable)
for (i = 0; i < screenInfo.numScreens; i++) {
if (screenInfo.screens[i]) {
SetRootClip(screenInfo.screens[i], enable);
SetRootClip(screenInfo.screens[i], mode);
}
}
}

2
hw/xquartz/quartz.h
View File

@ -149,7 +149,7 @@ QuartzShow(void);
void
QuartzHide(void);
void
QuartzSetRootClip(BOOL enable);
QuartzSetRootClip(int mode);
void
QuartzSpaceChanged(uint32_t space_id);

3
hw/xwayland/xwayland-glamor.c
View File

@ -236,7 +236,6 @@ xwl_glamor_create_screen_resources(ScreenPtr screen)
if (xwl_screen->rootless) {
screen->devPrivate =
fbCreatePixmap(screen, 0, 0, screen->rootDepth, 0);
SetRootClip(screen, FALSE);
}
else {
screen->devPrivate =
@ -247,6 +246,8 @@ xwl_glamor_create_screen_resources(ScreenPtr screen)
glamor_set_screen_pixmap(screen->devPrivate, NULL);
}
SetRootClip(screen, xwl_screen->root_clip_mode);
return screen->devPrivate != NULL;
}

9
hw/xwayland/xwayland-output.c
View File

@ -164,8 +164,8 @@ update_screen_size(struct xwl_output *xwl_output, int width, int height)
struct xwl_screen *xwl_screen = xwl_output->xwl_screen;
double mmpd;
if (!xwl_screen->rootless)
SetRootClip(xwl_screen->screen, FALSE);
if (xwl_screen->root_clip_mode == ROOT_CLIP_FULL)
SetRootClip(xwl_screen->screen, ROOT_CLIP_NONE);
xwl_screen->width = width;
xwl_screen->height = height;
@ -181,6 +181,8 @@ update_screen_size(struct xwl_output *xwl_output, int width, int height)
xwl_screen->screen->mmHeight = height * mmpd;
}
SetRootClip(xwl_screen->screen, xwl_screen->root_clip_mode);
if (xwl_screen->screen->root) {
xwl_screen->screen->root->drawable.width = width;
xwl_screen->screen->root->drawable.height = height;
@ -188,9 +190,6 @@ update_screen_size(struct xwl_output *xwl_output, int width, int height)
}
update_desktop_dimensions();
if (!xwl_screen->rootless)
SetRootClip(xwl_screen->screen, TRUE);
}
static void

6
hw/xwayland/xwayland-shm.c
View File

@ -279,16 +279,16 @@ xwl_shm_create_screen_resources(ScreenPtr screen)
if (!ret)
return ret;
if (xwl_screen->rootless) {
if (xwl_screen->rootless)
screen->devPrivate =
fbCreatePixmap(screen, 0, 0, screen->rootDepth, 0);
SetRootClip(screen, FALSE);
}
else
screen->devPrivate =
xwl_shm_create_pixmap(screen, screen->width, screen->height,
screen->rootDepth,
CREATE_PIXMAP_USAGE_BACKING_PIXMAP);
SetRootClip(screen, xwl_screen->root_clip_mode);
return screen->devPrivate != NULL;
}

7
hw/xwayland/xwayland.c
View File

@ -590,6 +590,13 @@ xwl_screen_init(ScreenPtr pScreen, int argc, char **argv)
}
}
/* In rootless mode, we don't have any screen storage, and the only
* rendering should be to redirected mode. */
if (xwl_screen->rootless)
xwl_screen->root_clip_mode = ROOT_CLIP_INPUT_ONLY;
else
xwl_screen->root_clip_mode = ROOT_CLIP_FULL;
if (xwl_screen->listen_fd_count > 0) {
if (xwl_screen->wm_fd >= 0)
AddCallback(&SelectionCallback, wm_selection_callback, xwl_screen);

1
hw/xwayland/xwayland.h
View File

@ -49,6 +49,7 @@ struct xwl_screen {
ScreenPtr screen;
WindowPtr pointer_limbo_window;
int expecting_event;
enum RootClipMode root_clip_mode;
int wm_fd;
int listen_fds[5];

4
hw/xwin/winrandr.c
View File

@ -75,7 +75,7 @@ winDoRandRScreenSetSize(ScreenPtr pScreen,
WindowPtr pRoot = pScreen->root;
// Prevent screen updates while we change things around
SetRootClip(pScreen, FALSE);
SetRootClip(pScreen, ROOT_CLIP_NONE);
/* Update the screen size as requested */
pScreenInfo->dwWidth = width;
@ -101,7 +101,7 @@ winDoRandRScreenSetSize(ScreenPtr pScreen,
// does this emit a ConfigureNotify??
// Restore the ability to update screen, now with new dimensions
SetRootClip(pScreen, TRUE);
SetRootClip(pScreen, ROOT_CLIP_FULL);
// and arrange for it to be repainted
pScreen->PaintWindow(pRoot, &pRoot->borderClip, PW_BACKGROUND);

8
include/window.h
View File

@ -72,6 +72,12 @@ struct _Cursor;
typedef struct _BackingStore *BackingStorePtr;
typedef struct _Window *WindowPtr;
enum RootClipMode {
ROOT_CLIP_NONE = 0, /**< resize the root window to 0x0 */
ROOT_CLIP_FULL = 1, /**< resize the root window to fit screen */
ROOT_CLIP_INPUT_ONLY = 2, /**< as above, but no rendering to screen */
};
typedef int (*VisitWindowProcPtr) (WindowPtr pWin,
void *data);
@ -221,7 +227,7 @@ extern _X_EXPORT RegionPtr CreateBoundingShape(WindowPtr /* pWin */ );
extern _X_EXPORT RegionPtr CreateClipShape(WindowPtr /* pWin */ );
extern _X_EXPORT void SetRootClip(ScreenPtr pScreen, Bool enable);
extern _X_EXPORT void SetRootClip(ScreenPtr pScreen, int enable);
extern _X_EXPORT void PrintWindowTree(void);
extern _X_EXPORT void PrintPassiveGrabs(void);