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exa: fix exaValidateGC.

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- use DEST in the createPixmap wrapper, because stipple already takes MASK (in case someone uses swappers).
- Anticipate some of the less common situations when fbValidateDrawable will access tile related pixmaps.
This commit is contained in:
Maarten Maathuis 2009-02-08 18:43:15 +01:00
parent 30daba6903
commit 6fd8fe9cb9
1 changed files with 54 additions and 28 deletions
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82
exa/exa.c
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@ -637,12 +637,15 @@ const GCFuncs exaGCFuncs = {
/*
* This wrapper exists to allow fbValidateGC to work.
* Note that we no longer assume newly created pixmaps to be in normal ram.
* This assumption is certainly not garuanteed with driver allocated pixmaps.
*/
static PixmapPtr
exaCreatePixmapWithPrepare(ScreenPtr pScreen, int w, int h, int depth,
unsigned usage_hint)
{
PixmapPtr pPixmap;
ExaMigrationRec pixmaps[1];
ExaScreenPriv(pScreen);
/* This swaps between this function and the real upper layer function.
@ -655,8 +658,16 @@ exaCreatePixmapWithPrepare(ScreenPtr pScreen, int w, int h, int depth,
if (!pPixmap)
return NULL;
/* We use MASK, because SRC is already taken. */
exaPrepareAccess(&pPixmap->drawable, EXA_PREPARE_MASK);
/* We need to use DEST, but we don't actually want to migrate as dest. */
/* SRC is taken by tile, and MASK by stipple. */
pixmaps[0].as_dst = 0;
pixmaps[0].as_src = 1;
pixmaps[0].pPix = exaGetDrawablePixmap (&pPixmap->drawable);
pixmaps[0].pReg = NULL;
exaDoMigration(pixmaps, 1, FALSE);
ExaDoPrepareAccess(&pPixmap->drawable, EXA_PREPARE_DEST);
return pPixmap;
}
@ -675,35 +686,50 @@ exaValidateGC(GCPtr pGC,
CreatePixmapProcPtr old_ptr = NULL;
PixmapPtr pTile = NULL;
EXA_GC_PROLOGUE(pGC);
if (changes & GCTile) {
/* save the "fb" pointer. */
old_ptr = pExaScr->SavedCreatePixmap;
/* create a new upper layer pointer. */
wrap(pExaScr, pScreen, CreatePixmap, exaCreatePixmapWithPrepare);
if (pGC->fillStyle == FillTiled)
pTile = pGC->tile.pixmap;
if (pTile)
exaPrepareAccess(&pTile->drawable, EXA_PREPARE_SRC);
}
exaPrepareAccessGC(pGC);
(*pGC->funcs->ValidateGC)(pGC, changes, pDrawable);
exaFinishAccessGC(pGC);
if (changes & GCTile) {
/* switch back to the normal upper layer. */
unwrap(pExaScr, pScreen, CreatePixmap);
/* restore copy of fb layer pointer. */
pExaScr->SavedCreatePixmap = old_ptr;
if (pTile)
exaFinishAccess(&pTile->drawable, EXA_PREPARE_SRC);
/* A new tile pixmap was created. */
if (pGC->tile.pixmap != pTile && pGC->fillStyle == FillTiled) {
exaFinishAccess(&pGC->tile.pixmap->drawable, EXA_PREPARE_MASK);
exaPixmapDirty(pGC->tile.pixmap, 0, 0,
pGC->tile.pixmap->drawable.width,
pGC->tile.pixmap->drawable.height);
/* save the "fb" pointer. */
old_ptr = pExaScr->SavedCreatePixmap;
/* create a new upper layer pointer. */
wrap(pExaScr, pScreen, CreatePixmap, exaCreatePixmapWithPrepare);
/* Either of these conditions is enough to trigger access to a tile pixmap. */
/* With pGC->tileIsPixel == 1, you run the risk of dereferencing an invalid tile pixmap pointer. */
/* XXX: find out who is forgetting to NULL these tile pixmap pointers. */
if (pGC->fillStyle == FillTiled || ((changes & GCTile) && !pGC->tileIsPixel)) {
pTile = pGC->tile.pixmap;
/* Sometimes tile pixmaps are swapped, you need access to:
* - The current tile if it depth matches.
* - Or the rotated tile if that one matches depth and !(changes & GCTile).
* - Or the current tile pixmap and a newly created one.
*/
if (pTile && pTile->drawable.depth != pDrawable->depth && !(changes & GCTile)) {
PixmapPtr pRotatedTile = fbGetRotatedPixmap(pGC);
if (pRotatedTile->drawable.depth == pDrawable->depth)
pTile = pRotatedTile;
}
}
if (pGC->stipple)
exaPrepareAccess(&pGC->stipple->drawable, EXA_PREPARE_MASK);
if (pTile)
exaPrepareAccess(&pTile->drawable, EXA_PREPARE_SRC);
(*pGC->funcs->ValidateGC)(pGC, changes, pDrawable);
if (pTile)
exaFinishAccess(&pTile->drawable, EXA_PREPARE_SRC);
if (pGC->stipple)
exaFinishAccess(&pGC->stipple->drawable, EXA_PREPARE_MASK);
/* switch back to the normal upper layer. */
unwrap(pExaScr, pScreen, CreatePixmap);
/* restore copy of fb layer pointer. */
pExaScr->SavedCreatePixmap = old_ptr;
if (pGC->fillStyle == FillTiled && pTile != pGC->tile.pixmap)
exaFinishAccess(&pGC->tile.pixmap->drawable, EXA_PREPARE_DEST);
EXA_GC_EPILOGUE(pGC);
}