Integrate COMPOSITEWRAP branch including composite wrapper. This code still

    has several issues, including:
- CopyWindow and PaintWindow wrappers missing (will be done soon)
- Some segfaults seen in the Render wrappers.
- Xprt server build breaks with Composite.
- DDXs must be recompiled for Composite due to VisualRec size change.
- Composite bugs pointed out by Deron Johnson in email.
Also, reorder XFixes initialization according to comments by Keith which
    are also in xserver CVS.

1 files changed, 537 insertions, 0 deletions

diff --git a/composite/compalloc.c b/composite/compalloc.c
new file mode 100644
index 000000000..f63c475a7
--- /dev/null
+++ b/composite/compalloc.c
@@ -0,0 +1,537 @@
+/*
+ * $Id$
+ *
+ * Copyright © 2003 Keith Packard
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of Keith Packard not be used in
+ * advertising or publicity pertaining to distribution of the software without
+ * specific, written prior permission.  Keith Packard makes no
+ * representations about the suitability of this software for any purpose.  It
+ * is provided "as is" without express or implied warranty.
+ *
+ * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include "compint.h"
+
+void
+compReportDamage (DamagePtr pDamage, RegionPtr pRegion, void *closure)
+{
+    WindowPtr	    pWin = (WindowPtr) closure;
+    ScreenPtr	    pScreen = pWin->drawable.pScreen;
+    CompScreenPtr   cs = GetCompScreen (pScreen);
+    CompWindowPtr   cw = GetCompWindow (pWin);
+
+    cs->damaged = TRUE;
+    cw->damaged = TRUE;
+}
+
+static void
+compDestroyDamage (DamagePtr pDamage, void *closure)
+{
+    WindowPtr	    pWin = (WindowPtr) closure;
+    CompWindowPtr   cw = GetCompWindow (pWin);
+
+    cw->damage = 0;
+}
+
+/*
+ * Redirect one window for one client
+ */
+int
+compRedirectWindow (ClientPtr pClient, WindowPtr pWin, int update)
+{
+    CompWindowPtr	cw = GetCompWindow (pWin);
+    CompClientWindowPtr	ccw;
+    Bool		wasMapped = pWin->mapped;
+
+    /*
+     * Only one Manual update is allowed
+     */
+    if (cw && update == CompositeRedirectManual)
+	for (ccw = cw->clients; ccw; ccw = ccw->next)
+	    if (ccw->update == CompositeRedirectManual)
+		return BadAccess;
+    
+    /*
+     * Allocate per-client per-window structure 
+     * The client *could* allocate multiple, but while supported,
+     * it is not expected to be common
+     */
+    ccw = xalloc (sizeof (CompClientWindowRec));
+    if (!ccw)
+	return BadAlloc;
+    ccw->id = FakeClientID (pClient->index);
+    ccw->update = update;
+    /*
+     * Now make sure there's a per-window structure to hang this from
+     */
+    if (!cw)
+    {
+	cw = xalloc (sizeof (CompWindowRec));
+	if (!cw)
+	{
+	    xfree (ccw);
+	    return BadAlloc;
+	}
+	cw->damage = DamageCreate (compReportDamage,
+				   compDestroyDamage,
+				   DamageReportNonEmpty,
+				   FALSE,
+				   pWin->drawable.pScreen,
+				   pWin);
+	if (!cw->damage)
+	{
+	    xfree (ccw);
+	    xfree (cw);
+	    return BadAlloc;
+	}
+	if (wasMapped)
+	    UnmapWindow (pWin, FALSE);
+
+	REGION_NULL (pScreen, &cw->borderClip);
+	cw->update = CompositeRedirectAutomatic;
+	cw->clients = 0;
+	cw->oldx = COMP_ORIGIN_INVALID;
+	cw->oldy = COMP_ORIGIN_INVALID;
+	cw->damageRegistered = FALSE;
+	cw->damaged = FALSE;
+	pWin->devPrivates[CompWindowPrivateIndex].ptr = cw;
+    }
+    ccw->next = cw->clients;
+    cw->clients = ccw;
+    if (!AddResource (ccw->id, CompositeClientWindowType, pWin))
+	return BadAlloc;
+    if (ccw->update == CompositeRedirectManual)
+    {
+	if (cw->damageRegistered)
+	{
+	    DamageUnregister (&pWin->drawable, cw->damage);
+	    cw->damageRegistered = FALSE;
+	}
+	cw->update = CompositeRedirectManual;
+    }
+
+    if (!compCheckRedirect (pWin))
+    {
+	FreeResource (ccw->id, RT_NONE);
+	return BadAlloc;
+    }
+    if (wasMapped && !pWin->mapped)
+    {
+	Bool	overrideRedirect = pWin->overrideRedirect;
+	pWin->overrideRedirect = TRUE;
+	MapWindow (pWin, pClient);
+	pWin->overrideRedirect = overrideRedirect;
+    }
+    
+    return Success;
+}
+
+/*
+ * Free one of the per-client per-window resources, clearing
+ * redirect and the per-window pointer as appropriate
+ */
+void
+compFreeClientWindow (WindowPtr pWin, XID id)
+{
+    CompWindowPtr	cw = GetCompWindow (pWin);
+    CompClientWindowPtr	ccw, *prev;
+    Bool		wasMapped = pWin->mapped;
+
+    if (!cw)
+	return;
+    for (prev = &cw->clients; (ccw = *prev); prev = &ccw->next)
+    {
+	if (ccw->id == id)
+	{
+	    *prev = ccw->next;
+	    if (ccw->update == CompositeRedirectManual)
+		cw->update = CompositeRedirectAutomatic;
+	    xfree (ccw);
+	    break;
+	}
+    }
+    if (!cw->clients)
+    {
+	if (wasMapped)
+	    UnmapWindow (pWin, FALSE);
+    
+	if (pWin->redirectDraw)
+	    compFreePixmap (pWin);
+
+	if (cw->damage)
+	    DamageDestroy (cw->damage);
+	
+	REGION_UNINIT (pScreen, &cw->borderClip);
+    
+	pWin->devPrivates[CompWindowPrivateIndex].ptr = 0;
+	xfree (cw);
+    }
+    else if (cw->update == CompositeRedirectAutomatic &&
+	     !cw->damageRegistered && pWin->redirectDraw)
+    {
+	DamageRegister (&pWin->drawable, cw->damage);
+	cw->damageRegistered = TRUE;
+	DamageDamageRegion (&pWin->drawable, &pWin->borderSize);
+    }
+    if (wasMapped && !pWin->mapped)
+    {
+	Bool	overrideRedirect = pWin->overrideRedirect;
+	pWin->overrideRedirect = TRUE;
+	MapWindow (pWin, clients[CLIENT_ID(id)]);
+	pWin->overrideRedirect = overrideRedirect;
+    }
+}
+
+/*
+ * This is easy, just free the appropriate resource.
+ */
+
+int
+compUnredirectWindow (ClientPtr pClient, WindowPtr pWin, int update)
+{
+    CompWindowPtr	cw = GetCompWindow (pWin);
+    CompClientWindowPtr	ccw;
+
+    if (!cw)
+	return BadValue;
+
+    for (ccw = cw->clients; ccw; ccw = ccw->next)
+	if (ccw->update == update && CLIENT_ID(ccw->id) == pClient->index)
+	{
+	    FreeResource (ccw->id, RT_NONE);
+	    return Success;
+	}
+    return BadValue;
+}
+	
+/*
+ * Redirect all subwindows for one client
+ */
+
+int
+compRedirectSubwindows (ClientPtr pClient, WindowPtr pWin, int update)
+{
+    CompSubwindowsPtr	csw = GetCompSubwindows (pWin);
+    CompClientWindowPtr	ccw;
+    WindowPtr		pChild;
+
+    /*
+     * Only one Manual update is allowed
+     */
+    if (csw && update == CompositeRedirectManual)
+	for (ccw = csw->clients; ccw; ccw = ccw->next)
+	    if (ccw->update == CompositeRedirectManual)
+		return BadAccess;
+    /*
+     * Allocate per-client per-window structure 
+     * The client *could* allocate multiple, but while supported,
+     * it is not expected to be common
+     */
+    ccw = xalloc (sizeof (CompClientWindowRec));
+    if (!ccw)
+	return BadAlloc;
+    ccw->id = FakeClientID (pClient->index);
+    ccw->update = update;
+    /*
+     * Now make sure there's a per-window structure to hang this from
+     */
+    if (!csw)
+    {
+	csw = xalloc (sizeof (CompSubwindowsRec));
+	if (!csw)
+	{
+	    xfree (ccw);
+	    return BadAlloc;
+	}
+	csw->update = CompositeRedirectAutomatic;
+	csw->clients = 0;
+	pWin->devPrivates[CompSubwindowsPrivateIndex].ptr = csw;
+    }
+    /*
+     * Redirect all existing windows
+     */
+    for (pChild = pWin->lastChild; pChild; pChild = pChild->prevSib)
+    {
+	int ret = compRedirectWindow (pClient, pChild, update);
+	if (ret != Success)
+	{
+	    for (pChild = pChild->nextSib; pChild; pChild = pChild->nextSib)
+		(void) compUnredirectWindow (pClient, pChild, update);
+	    if (!csw->clients)
+	    {
+		xfree (csw);
+		pWin->devPrivates[CompSubwindowsPrivateIndex].ptr = 0;
+	    }
+	    xfree (ccw);
+	    return ret;
+	}
+    }
+    /*
+     * Hook into subwindows list
+     */
+    ccw->next = csw->clients;
+    csw->clients = ccw;
+    if (!AddResource (ccw->id, CompositeClientSubwindowsType, pWin))
+	return BadAlloc;
+    if (ccw->update == CompositeRedirectManual)
+    {
+	csw->update = CompositeRedirectManual;
+	/* 
+	 * tell damage extension that damage events for this client are
+	 * critical output
+	 */
+	DamageExtSetCritical (pClient, TRUE);
+    }
+    return Success;
+}
+
+/*
+ * Free one of the per-client per-subwindows resources,
+ * which frees one redirect per subwindow
+ */
+void
+compFreeClientSubwindows (WindowPtr pWin, XID id)
+{
+    CompSubwindowsPtr	csw = GetCompSubwindows (pWin);
+    CompClientWindowPtr	ccw, *prev;
+    WindowPtr		pChild;
+
+    if (!csw)
+	return;
+    for (prev = &csw->clients; (ccw = *prev); prev = &ccw->next)
+    {
+	if (ccw->id == id)
+	{
+	    ClientPtr	pClient = clients[CLIENT_ID(id)];
+	    
+	    *prev = ccw->next;
+	    if (ccw->update == CompositeRedirectManual)
+	    {
+		/* 
+		 * tell damage extension that damage events for this client are
+		 * critical output
+		 */
+		DamageExtSetCritical (pClient, FALSE);
+		csw->update = CompositeRedirectAutomatic;
+		if (pWin->mapped)
+		    (*pWin->drawable.pScreen->ClearToBackground)(pWin, 0, 0, 0, 0, TRUE);
+	    }
+
+	    /*
+	     * Unredirect all existing subwindows
+	     */
+	    for (pChild = pWin->lastChild; pChild; pChild = pChild->prevSib)
+		(void) compUnredirectWindow (pClient, pChild, ccw->update);
+
+	    xfree (ccw);
+	    break;
+	}
+    }
+
+    /*
+     * Check if all of the per-client records are gone
+     */
+    if (!csw->clients)
+    {
+	pWin->devPrivates[CompSubwindowsPrivateIndex].ptr = 0;
+	xfree (csw);
+    }
+}
+
+/*
+ * This is easy, just free the appropriate resource.
+ */
+
+int
+compUnredirectSubwindows (ClientPtr pClient, WindowPtr pWin, int update)
+{
+    CompSubwindowsPtr	csw = GetCompSubwindows (pWin);
+    CompClientWindowPtr	ccw;
+    
+    if (!csw)
+	return BadValue;
+    for (ccw = csw->clients; ccw; ccw = ccw->next)
+	if (ccw->update == update && CLIENT_ID(ccw->id) == pClient->index)
+	{
+	    FreeResource (ccw->id, RT_NONE);
+	    return Success;
+	}
+    return BadValue;
+}
+
+/*
+ * Add redirection information for one subwindow (during reparent)
+ */
+
+int
+compRedirectOneSubwindow (WindowPtr pParent, WindowPtr pWin)
+{
+    CompSubwindowsPtr	csw = GetCompSubwindows (pParent);
+    CompClientWindowPtr	ccw;
+
+    if (!csw)
+	return Success;
+    for (ccw = csw->clients; ccw; ccw = ccw->next)
+    {
+	int ret = compRedirectWindow (clients[CLIENT_ID(ccw->id)],
+				      pWin, ccw->update);
+	if (ret != Success)
+	    return ret;
+    }
+    return Success;
+}
+
+/*
+ * Remove redirection information for one subwindow (during reparent)
+ */
+
+int
+compUnredirectOneSubwindow (WindowPtr pParent, WindowPtr pWin)
+{
+    CompSubwindowsPtr	csw = GetCompSubwindows (pParent);
+    CompClientWindowPtr	ccw;
+
+    if (!csw)
+	return Success;
+    for (ccw = csw->clients; ccw; ccw = ccw->next)
+    {
+	int ret = compUnredirectWindow (clients[CLIENT_ID(ccw->id)],
+					pWin, ccw->update);
+	if (ret != Success)
+	    return ret;
+    }
+    return Success;
+}
+
+Bool
+compAllocPixmap (WindowPtr pWin)
+{
+    ScreenPtr	    pScreen = pWin->drawable.pScreen;
+    PixmapPtr	    pPixmap;
+    int		    bw = (int) pWin->borderWidth;
+    int		    x, y, w, h;
+    CompWindowPtr   cw = GetCompWindow (pWin);
+
+    x = pWin->drawable.x - bw;
+    y = pWin->drawable.y - bw;
+    w = pWin->drawable.width + (bw << 1);
+    h = pWin->drawable.height + (bw << 1);
+    pPixmap = (*pScreen->CreatePixmap) (pScreen, w, h, pWin->drawable.depth);
+    if (!pPixmap)
+	return FALSE;
+    pPixmap->screen_x = x;
+    pPixmap->screen_y = y;
+    pWin->redirectDraw = TRUE;
+    compSetPixmap (pWin, pPixmap);
+    cw->oldx = COMP_ORIGIN_INVALID;
+    cw->oldy = COMP_ORIGIN_INVALID;
+    cw->damageRegistered = FALSE;
+    if (cw->update == CompositeRedirectAutomatic)
+    {
+	DamageRegister (&pWin->drawable, cw->damage);
+	cw->damageRegistered = TRUE;
+    }
+    return TRUE;
+}
+
+void
+compFreePixmap (WindowPtr pWin)
+{
+    ScreenPtr	    pScreen = pWin->drawable.pScreen;
+    PixmapPtr	    pRedirectPixmap, pParentPixmap;
+    CompWindowPtr   cw = GetCompWindow (pWin);
+
+    if (cw->damageRegistered)
+    {
+	DamageUnregister (&pWin->drawable, cw->damage);
+	cw->damageRegistered = FALSE;
+    }
+    /*
+     * Move the parent-constrained border clip region back into
+     * the window so that ValidateTree will handle the unmap
+     * case correctly.  Unmap adds the window borderClip to the
+     * parent exposed area; regions beyond the parent cause crashes
+     */
+    REGION_COPY (pScreen, &pWin->borderClip, &cw->borderClip);
+    pRedirectPixmap = (*pScreen->GetWindowPixmap) (pWin);
+    pParentPixmap = (*pScreen->GetWindowPixmap) (pWin->parent);
+    pWin->redirectDraw = FALSE;
+    compSetPixmap (pWin, pParentPixmap);
+    (*pScreen->DestroyPixmap) (pRedirectPixmap);
+}
+
+/*
+ * Make sure the pixmap is the right size and offset.  Allocate a new
+ * pixmap to change size, adjust origin to change offset, leaving the
+ * old pixmap in cw->pOldPixmap so bits can be recovered
+ */
+Bool
+compReallocPixmap (WindowPtr pWin, int draw_x, int draw_y,
+		   unsigned int w, unsigned int h, int bw)
+{
+    ScreenPtr	    pScreen = pWin->drawable.pScreen;
+    PixmapPtr	    pOld = (*pScreen->GetWindowPixmap) (pWin);
+    PixmapPtr	    pNew;
+    CompWindowPtr   cw = GetCompWindow (pWin);
+    int		    pix_x, pix_y;
+    unsigned int    pix_w, pix_h;
+
+    assert (cw && pWin->redirectDraw);
+    pix_x = draw_x - bw;
+    pix_y = draw_y - bw;
+    pix_w = w + (bw << 1);
+    pix_h = h + (bw << 1);
+    cw->oldx = pOld->screen_x;
+    cw->oldy = pOld->screen_y;
+    if (pix_w != pOld->drawable.width ||
+	pix_h != pOld->drawable.height)
+    {
+	GCPtr	pGC;
+	
+	pNew = (*pScreen->CreatePixmap) (pScreen, pix_w, pix_h, pWin->drawable.depth);
+	if (!pNew)
+	    return FALSE;
+	cw->pOldPixmap = pOld;
+	compSetPixmap (pWin, pNew);
+	/*
+	 * Copy new bits to align at same place on the screen.  CopyWindow
+	 * calls will patch up any differences
+	 */
+	pGC = GetScratchGC (pNew->drawable.depth, pScreen);
+	if (pGC)
+	{
+	    ValidateGC(&pNew->drawable, pGC);
+	    (*pGC->ops->CopyArea) (&pOld->drawable,
+				   &pNew->drawable,
+				   pGC,
+				   pWin->drawable.x - draw_x,
+				   pWin->drawable.y - draw_y,
+				   pix_w, pix_h,
+				   0, 0);
+	    FreeScratchGC (pGC);
+	}
+    }
+    else
+    {
+	pNew = pOld;
+	cw->pOldPixmap = 0;
+    }
+    pNew->screen_x = pix_x;
+    pNew->screen_y = pix_y;
+    return TRUE;
+}