Imported nx-X11-3.1.0-1.tar.gznx-X11/3.1.0-1

Summary: Imported nx-X11-3.1.0-1.tar.gz
Keywords:

Imported nx-X11-3.1.0-1.tar.gz
into Git repository

1 files changed, 539 insertions, 0 deletions

diff --git a/nx-X11/programs/Xserver/hw/dmx/glxProxy/glxswap.c b/nx-X11/programs/Xserver/hw/dmx/glxProxy/glxswap.c
new file mode 100644
index 000000000..f7fcc37ac
--- /dev/null
+++ b/nx-X11/programs/Xserver/hw/dmx/glxProxy/glxswap.c
@@ -0,0 +1,539 @@
+/* $XFree86$ */
+/*
+ * Copyright 2003 Red Hat Inc., Raleigh, North Carolina.
+ *
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation on the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial
+ * portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NON-INFRINGEMENT.  IN NO EVENT SHALL RED HAT AND/OR THEIR SUPPLIERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+/*
+ * Authors:
+ *   Kevin E. Martin <kem@redhat.com>
+ *
+ */
+
+#ifdef HAVE_DMX_CONFIG_H
+#include <dmx-config.h>
+#endif
+
+#include "dmx.h"
+#include "dmxwindow.h"
+#include "glxserver.h"
+#include "glxswap.h"
+
+extern int __glXDoSwapBuffers(__GLXclientState *cl, XID drawId,
+			      GLXContextTag tag);
+
+typedef struct _SwapGroup *SwapGroupPtr;
+
+static Bool SwapBarrierIsReadyToSwap(GLuint barrier);
+static void SwapSwapBarrier(GLuint barrier);
+static void UpdateSwapBarrierList(GLuint barrier,
+				  SwapGroupPtr pOldSwap,
+				  SwapGroupPtr pNewSwap);
+
+
+/************************************************************************
+ *
+ * Swap Groups
+ *
+ ************************************************************************/
+
+typedef struct _SwapGroup {
+    WindowPtr         pWin;
+    SwapGroupPtr      pNext;
+
+    Bool              swapping;
+    Bool              sleeping;
+    GLuint            barrier;
+
+    XID               drawable;
+    GLXContextTag     tag;
+    __GLXclientState *clState;
+} SwapGroupRec;
+
+
+static void SwapSwapGroup(SwapGroupPtr pSwap)
+{
+    SwapGroupPtr  pCur;
+
+    /* All drawables in swap group are ready to swap, so just swap all
+     * drawables buffers and then wake up those clients that were
+     * previously sleeping */
+
+    for (pCur = pSwap; pCur; pCur = pCur->pNext) {
+	if (pCur->swapping) {
+	    /* Swap pCur's buffers */
+	    __glXDoSwapBuffers(pCur->clState, pCur->drawable, pCur->tag);
+	    pCur->swapping = FALSE;
+	}
+
+	/* Wakeup client */
+	if (pCur->sleeping) {
+	    ClientWakeup(pCur->clState->client);
+	    pCur->sleeping = FALSE;
+	}
+    }
+}
+
+static Bool SwapGroupIsReadyToSwap(SwapGroupPtr pSwap)
+{
+    Bool  isReady = TRUE;
+
+    /* The swap group is ready to swap when all drawables are ready to
+     * swap.  NOTE: A drawable is also ready to swap if it is not
+     * currently mapped */
+    for (; pSwap; pSwap = pSwap->pNext) {
+	isReady &= (pSwap->swapping || !pSwap->pWin->mapped);
+	/* FIXME: Should we use pSwap->pWin->mapped or ...->realized ??? */
+    }
+
+    return isReady;
+}
+
+static Bool SGSwapCleanup(ClientPtr client, pointer closure)
+{
+    /* SwapGroupPtr  pSwap = (SwapGroupPtr)closure; */
+
+    /* This should not be called unless the client has died in which
+     * case we should remove the buffer from the swap list */
+
+    return TRUE;
+}
+
+int SGSwapBuffers(__GLXclientState *cl, XID drawId, GLXContextTag tag,
+		  DrawablePtr pDraw)
+{
+    WindowPtr      pWin     = (WindowPtr)pDraw;
+    dmxWinPrivPtr  pWinPriv = DMX_GET_WINDOW_PRIV(pWin);
+    SwapGroupPtr   pSwap    = pWinPriv->swapGroup;
+    SwapGroupPtr   pCur;
+
+    for (pCur = pSwap; pCur && pCur->pWin != pWin; pCur = pCur->pNext);
+    if (!pCur)
+	return BadDrawable;
+
+    pCur->clState  = cl;
+    pCur->drawable = drawId;
+    pCur->tag      = tag;
+
+    /* We are now in the process of swapping */
+    pCur->swapping = TRUE;
+
+    if (pSwap->barrier && SwapBarrierIsReadyToSwap(pSwap->barrier)) {
+	/* The swap group is bound to a barrier and the barrier is ready
+	 * to swap, so swap all the swap groups that are bound to this
+	 * group's swap barrier */
+	SwapSwapBarrier(pSwap->barrier);
+    } else if (!pSwap->barrier && SwapGroupIsReadyToSwap(pSwap)) {
+	/* Do the swap if the entire swap group is ready to swap and the
+	 * group is not bound to a swap barrier */
+	SwapSwapGroup(pSwap);
+    } else {
+	/* The swap group/barrier is not yet ready to swap, so put
+	 * client to sleep until the rest are ready to swap */
+	ClientSleep(cl->client, SGSwapCleanup, (pointer)pWin);
+	pCur->sleeping = TRUE;
+    }
+
+    return Success;
+}
+
+static void SGWindowUnmapped(WindowPtr pWin)
+{
+    dmxWinPrivPtr  pWinPriv = DMX_GET_WINDOW_PRIV(pWin);
+    SwapGroupPtr   pSwap    = pWinPriv->swapGroup;
+
+    /* Now that one of the windows in the swap group has been unmapped,
+     * see if the entire swap group/barrier is ready to swap */
+
+    if (pSwap->barrier && SwapBarrierIsReadyToSwap(pSwap->barrier)) {
+	SwapSwapBarrier(pSwap->barrier);
+    } else if (!pSwap->barrier && SwapGroupIsReadyToSwap(pSwap)) {
+	SwapSwapGroup(pSwap);
+    }
+}
+
+static void SGWindowDestroyed(WindowPtr pWin)
+{
+    JoinSwapGroupSGIX((DrawablePtr)pWin, NULL);
+}
+
+static SwapGroupPtr CreateSwapEntry(WindowPtr pWin)
+{
+    SwapGroupPtr  pEntry;
+
+    /* Allocate new swap group */
+    pEntry = xalloc(sizeof(*pEntry));
+    if (!pEntry) return NULL;
+
+    /* Initialize swap group */
+    pEntry->pWin     = pWin;
+    pEntry->pNext    = NULL;
+    pEntry->swapping = FALSE;
+    pEntry->sleeping = FALSE;
+    pEntry->barrier  = 0;
+    /* The following are not initialized until SwapBuffers is called:
+     *     pEntry->drawable
+     *     pEntry->tag
+     *     pEntry->clState
+     */
+
+    return pEntry;
+}
+
+static void FreeSwapEntry(SwapGroupPtr pEntry)
+{
+    /* Since we have removed the drawable from its previous swap group
+     * and it won't be added to another swap group, the only thing that
+     * we need to do is to make sure that the drawable's client is not
+     * sleeping.  This could happen if one thread is sleeping, while
+     * another thread called glxJoinSwapGroup().  Note that all sleeping
+     * threads should also be swapping, but there is a small window in
+     * the SGSwapBuffer() logic, above, where swapping can be set but
+     * sleeping is not.  We check both independently here just to be
+     * pedantic. */
+
+    /* Handle swap buffer request */
+    if (pEntry->swapping)
+	__glXDoSwapBuffers(pEntry->clState, pEntry->drawable, pEntry->tag);
+
+    /* Wake up client */
+    if (pEntry->sleeping)
+	ClientWakeup(pEntry->clState->client);
+
+    /* We can free the pEntry entry since it has already been removed
+     * from the swap group list and it won't be needed any longer */
+    xfree(pEntry);
+}
+
+int JoinSwapGroupSGIX(DrawablePtr pDraw, DrawablePtr pMember)
+{
+    if (pDraw->type == DRAWABLE_WINDOW) {
+	WindowPtr      pWin     = (WindowPtr)pDraw;
+	dmxWinPrivPtr  pWinPriv = DMX_GET_WINDOW_PRIV(pWin);
+	SwapGroupPtr   pOldSwap = NULL;
+	SwapGroupPtr   pEntry;
+
+	/* If pDraw and pMember are already members of the same swap
+	 * group, just return Success since there is nothing to do */
+	for (pEntry = pWinPriv->swapGroup; pEntry; pEntry = pEntry->pNext)
+	    if (pEntry->pWin == (WindowPtr)pMember)
+		return Success;
+
+	/* Remove pDraw from its current swap group */
+	if (pWinPriv->swapGroup) {
+	    SwapGroupPtr  pSwapGroup = pWinPriv->swapGroup;
+	    SwapGroupPtr  pPrev;
+
+	    /* Find old swap entry in swap group and save in pOldSwap
+	     * for later use */
+	    for (pOldSwap = pWinPriv->swapGroup, pPrev = NULL;
+		 pOldSwap && pOldSwap->pWin != pWin;
+		 pPrev = pOldSwap, pOldSwap = pOldSwap->pNext);
+	    if (!pOldSwap)
+		return BadDrawable;
+
+	    /* Remove pDraw's swap group entry from swap group list */
+	    if (pPrev) {
+		pPrev->pNext = pOldSwap->pNext;
+	    } else {
+		/* pWin is at the head of the swap group list, so we
+		 * need to update all other members of this swap
+		 * group */
+		for (pEntry = pOldSwap->pNext; pEntry; pEntry = pEntry->pNext)
+		    DMX_GET_WINDOW_PRIV(pEntry->pWin)->swapGroup
+			= pOldSwap->pNext;
+
+		/* Update the barrier list as well */
+		if (pOldSwap->barrier)
+		    UpdateSwapBarrierList(pOldSwap->barrier,
+					  pOldSwap, pOldSwap->pNext);
+
+		/* Set pSwapGroup to point to the swap group without
+		 * pOldSwap */
+		pSwapGroup = pOldSwap->pNext;
+	    }
+
+	    /* Check to see if current swap group can now swap since we
+	     * know at this point that pDraw and pMember are guaranteed
+	     * to previously be in different swap groups */
+	    if (pSwapGroup && SwapGroupIsReadyToSwap(pSwapGroup)) {
+		SwapSwapGroup(pSwapGroup);
+	    }
+
+	    /* Make the old swap entry a standalone group */
+	    pOldSwap->pNext = NULL;
+	    pOldSwap->barrier = 0;
+
+	    /* Reset pWin's swap group */
+	    pWinPriv->swapGroup = NULL;
+	    pWinPriv->windowDestroyed = NULL;
+	    pWinPriv->windowUnmapped = NULL;
+	}
+
+	if (!pMember || pMember->type != DRAWABLE_WINDOW) {
+	    /* Free old swap group since it is no longer needed */
+	    if (pOldSwap) FreeSwapEntry(pOldSwap);
+	} else if (pDraw == pMember && pOldSwap) {
+	    /* Special case where pDraw was previously created and we
+	     * are now just putting it to its own swap group */
+	    pWinPriv->swapGroup = pOldSwap;
+	    pWinPriv->windowDestroyed = SGWindowDestroyed;
+	    pWinPriv->windowUnmapped = SGWindowUnmapped;
+
+	    /* Check to see if pDraw is ready to swap */
+	    if (SwapGroupIsReadyToSwap(pOldSwap))
+		SwapSwapGroup(pOldSwap);
+	} else if (pMember->type == DRAWABLE_WINDOW) {
+	    WindowPtr      pMemberWin       = (WindowPtr)pMember;
+	    dmxWinPrivPtr  pMemberPriv      = DMX_GET_WINDOW_PRIV(pMemberWin);
+	    SwapGroupPtr   pMemberSwapGroup = pMemberPriv->swapGroup;
+
+	    /* Finally, how we can add pDraw to pMember's swap group */
+
+	    /* If pMember is not currently in a swap group, then create
+	     * one for it since we are just about to add pDraw to it. */
+	    if (!pMemberSwapGroup) {
+		/* Create new swap group */
+		pMemberSwapGroup = CreateSwapEntry(pMemberWin);
+		if (!pMemberSwapGroup) {
+		    if (pOldSwap) FreeSwapEntry(pOldSwap);
+		    return BadAlloc;
+		}
+
+		/* Set pMember's swap group */
+		pMemberPriv->swapGroup = pMemberSwapGroup;
+		pMemberPriv->windowDestroyed = SGWindowDestroyed;
+		pMemberPriv->windowUnmapped = SGWindowUnmapped;
+	    }
+
+	    /* If pDraw == pMember, that means pDraw was not a member of
+	     * a group previously (or it would have been handled by the
+	     * special case above), so no additional work is required
+	     * since we just created a new swap group for pMember (i.e.,
+	     * pDraw). */
+
+	    if (pDraw != pMember) {
+		/* If pDraw was not previously in a swap group, then create
+		 * an entry for it */
+		if (!pOldSwap) {
+		    /* Create new swap group */
+		    pOldSwap = CreateSwapEntry(pWin);
+		    if (!pOldSwap) {
+			/* If we just created a swap group for pMember, we
+			 * need to free it here */
+			if (pMemberSwapGroup->pNext == NULL) {
+			    FreeSwapEntry(pMemberSwapGroup);
+			    pMemberPriv->swapGroup = NULL;
+			}
+			return BadAlloc;
+		    }
+		}
+
+		/* Find last entry in pMember's swap group */
+		for (pEntry = pMemberSwapGroup;
+		     pEntry->pNext;
+		     pEntry = pEntry->pNext);
+
+		/* Add pDraw's swap group entry to pMember's swap group list */
+		pEntry->pNext = pOldSwap;
+
+		/* Add pDraw to pMember's swap barrier */
+		pOldSwap->barrier = pEntry->barrier;
+
+		/* Set pDraw's swap group */
+		pWinPriv->swapGroup = pMemberSwapGroup;
+		pWinPriv->windowDestroyed = SGWindowDestroyed;
+		pWinPriv->windowUnmapped = SGWindowUnmapped;
+	    }
+	}
+    }
+
+    return Success;
+}
+
+
+/************************************************************************
+ *
+ * Swap Barriers
+ *
+ ************************************************************************/
+
+#define GLX_MAX_SWAP_BARRIERS 10
+
+typedef struct _SwapBarrier *SwapBarrierPtr;
+typedef struct _SwapBarrier {
+    SwapGroupPtr    pSwap;
+    SwapBarrierPtr  pNext;
+} SwapBarrierRec;
+
+static SwapBarrierPtr SwapBarrierList[GLX_MAX_SWAP_BARRIERS+1];
+
+void SwapBarrierInit(void)
+{
+    int  i;
+
+    for (i = 0; i <= GLX_MAX_SWAP_BARRIERS; i++)
+	SwapBarrierList[i] = NULL;
+}
+
+void SwapBarrierReset(void)
+{
+    int  i;
+
+    for (i = 0; i <= GLX_MAX_SWAP_BARRIERS; i++) {
+	SwapBarrierPtr  pBarrier, pNextBarrier;;
+	for (pBarrier = SwapBarrierList[i];
+	     pBarrier;
+	     pBarrier = pNextBarrier) {
+	    pNextBarrier = pBarrier->pNext;
+	    xfree(pBarrier);
+	}
+	SwapBarrierList[i] = NULL;
+    }
+}
+
+int QueryMaxSwapBarriersSGIX(int screen)
+{
+    return GLX_MAX_SWAP_BARRIERS;
+}
+
+static Bool BindSwapGroupToBarrier(GLuint barrier, SwapGroupPtr pSwapGroup)
+{
+    SwapBarrierPtr  pBarrier;
+
+    pBarrier = xalloc(sizeof(*pBarrier));
+    if (!pBarrier) return FALSE;
+
+    /* Add the swap group to barrier's list */
+    pBarrier->pSwap = pSwapGroup;
+    pBarrier->pNext = SwapBarrierList[barrier];
+    SwapBarrierList[barrier] = pBarrier;
+
+    return TRUE;
+}
+
+static Bool UnbindSwapGroupFromBarrier(GLuint barrier, SwapGroupPtr pSwapGroup)
+{
+    SwapBarrierPtr  pBarrier, pPrevBarrier;
+
+    /* Find the swap group in barrier's list */
+    for (pBarrier = SwapBarrierList[barrier], pPrevBarrier = NULL;
+	 pBarrier && pBarrier->pSwap != pSwapGroup;
+	 pPrevBarrier = pBarrier, pBarrier = pBarrier->pNext);
+    if (!pBarrier) return FALSE;
+
+    /* Remove the swap group from barrier's list */
+    if (pPrevBarrier) pPrevBarrier->pNext = pBarrier->pNext;
+    else              SwapBarrierList[barrier] = pBarrier->pNext;
+
+    /* Free memory */
+    xfree(pBarrier);
+
+    return TRUE;
+}
+
+static void UpdateSwapBarrierList(GLuint barrier,
+				  SwapGroupPtr pOldSwap,
+				  SwapGroupPtr pNewSwap)
+{
+    SwapBarrierPtr  pBarrier;
+
+    /* If the old swap group is being destroyed, then we need to remove
+     * the swap group from the list entirely */
+    if (!pNewSwap) {
+	UnbindSwapGroupFromBarrier(barrier, pOldSwap);
+	return;
+    }
+
+    /* Otherwise, find the old swap group in the barrier list and change
+     * it to the new swap group */
+    for (pBarrier = SwapBarrierList[barrier];
+	 pBarrier;
+	 pBarrier = pBarrier->pNext) {
+	if (pBarrier->pSwap == pOldSwap) {
+	    pBarrier->pSwap = pNewSwap;
+	    return;
+	}
+    }
+}
+
+static Bool SwapBarrierIsReadyToSwap(GLuint barrier)
+{
+    SwapBarrierPtr  pBarrier;
+    Bool            isReady = TRUE;
+
+    /* The swap barier is ready to swap when swap groups that are bound
+     * to barrier are ready to swap */
+    for (pBarrier = SwapBarrierList[barrier];
+	 pBarrier;
+	 pBarrier = pBarrier->pNext)
+	isReady &= SwapGroupIsReadyToSwap(pBarrier->pSwap);
+
+    return isReady;
+}
+
+static void SwapSwapBarrier(GLuint barrier)
+{
+    SwapBarrierPtr  pBarrier;
+
+    /* Swap each group that is a member of this barrier */
+    for (pBarrier = SwapBarrierList[barrier];
+	 pBarrier;
+	 pBarrier = pBarrier->pNext)
+	SwapSwapGroup(pBarrier->pSwap);
+}
+
+int BindSwapBarrierSGIX(DrawablePtr pDraw, int barrier)
+{
+    /* FIXME: Check for errors when pDraw->type != DRAWABLE_WINDOW */
+
+    if (barrier < 0 || barrier > GLX_MAX_SWAP_BARRIERS)
+	return BadValue;
+
+    if (pDraw->type == DRAWABLE_WINDOW) {
+	WindowPtr       pWin       = (WindowPtr)pDraw;
+	dmxWinPrivPtr   pWinPriv   = DMX_GET_WINDOW_PRIV(pWin);
+	SwapGroupPtr    pSwapGroup = pWinPriv->swapGroup;
+	SwapGroupPtr    pCur;
+
+	if (!pSwapGroup) return BadDrawable;
+	if (barrier && pSwapGroup->barrier) return BadValue;
+
+	/* Update the swap barrier list */
+	if (barrier) {
+	    if (!BindSwapGroupToBarrier(barrier, pSwapGroup))
+		return BadAlloc;
+	} else {
+	    if (!UnbindSwapGroupFromBarrier(pSwapGroup->barrier, pSwapGroup))
+		return BadDrawable;
+	}
+
+	/* Set the barrier for each member of this swap group */
+	for (pCur = pSwapGroup; pCur; pCur = pCur->pNext)
+	    pCur->barrier = barrier;
+    }
+
+    return Success;
+}