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