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exa: Use damage to optimise away useless copies.

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This commit is contained in:
Maarten Maathuis 2009-08-02 02:35:46 +02:00
commit 9d2a7128d3
2 changed files with 69 additions and 8 deletions
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27
exa/exa_mixed.c
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@ -114,6 +114,23 @@ exaCreatePixmap_mixed(ScreenPtr pScreen, int w, int h, int depth,
/* We want to be able to copy the pixmap to driver memory later on. */
pExaPixmap->score = EXA_PIXMAP_SCORE_INIT;
/* Set up damage tracking */
pExaPixmap->pDamage = DamageCreate (NULL, NULL,
DamageReportNone, TRUE,
pScreen, pPixmap);
if (pExaPixmap->pDamage == NULL) {
swap(pExaScr, pScreen, DestroyPixmap);
pScreen->DestroyPixmap (pPixmap);
swap(pExaScr, pScreen, DestroyPixmap);
return NULL;
}
DamageRegister (&pPixmap->drawable, pExaPixmap->pDamage);
/* This ensures that pending damage reflects the current operation. */
/* This is used by exa to optimize migration. */
DamageSetReportAfterOp (pExaPixmap->pDamage, TRUE);
}
return pPixmap;
@ -136,8 +153,16 @@ exaModifyPixmapHeader_mixed(PixmapPtr pPixmap, int width, int height, int depth,
if (pExaPixmap) {
if (pPixData) {
if (!exaPixmapIsPinned(pPixmap))
if (!exaPixmapIsPinned(pPixmap)) {
free(pExaPixmap->sys_ptr);
/* We no longer need this. */
if (pExaPixmap->pDamage) {
DamageUnregister(&pPixmap->drawable, pExaPixmap->pDamage);
DamageDestroy(pExaPixmap->pDamage);
pExaPixmap->pDamage = NULL;
}
}
pExaPixmap->sys_ptr = pPixData;
}