static void
shadowRedisplay(ScreenPtr pScreen)
{
shadowBuf(pScreen);
RegionPtr pRegion;
if (!pBuf || !pBuf->pDamage || !pBuf->update)
return;
pRegion = DamageRegion(pBuf->pDamage);
if (RegionNotEmpty(pRegion)) {
(*pBuf->update) (pScreen, pBuf);
DamageEmpty(pBuf->pDamage);
}
}
static void
shadowGetImage(DrawablePtr pDrawable, int sx, int sy, int w, int h,
unsigned int format, unsigned long planeMask, char *pdstLine)
{
ScreenPtr pScreen = pDrawable->pScreen;
shadowBuf(pScreen);
/* Many apps use GetImage to sync with the visable frame buffer */
if (pDrawable->type == DRAWABLE_WINDOW)
shadowRedisplay(pScreen);
unwrap(pBuf, pScreen, GetImage);
pScreen->GetImage(pDrawable, sx, sy, w, h, format, planeMask, pdstLine);
wrap(pBuf, pScreen, GetImage);
}
static void
shadowRedisplay(ScreenPtr pScreen)
{
shadowBuf(pScreen);
RegionPtr pRegion;
if (!pBuf || !pBuf->pDamage || !pBuf->update)
return;
/* allow deferral of updates, to minimize overdraw, etc. */
if (!pBuf->ready_to_update(pScreen, pBuf))
return;
pRegion = DamageRegion(pBuf->pDamage);
if (REGION_NOTEMPTY(pScreen, pRegion)) {
(*pBuf->update)(pScreen, pBuf);
DamageEmpty(pBuf->pDamage);
}
}
void
shadowRemove(ScreenPtr pScreen, PixmapPtr pPixmap)
{
shadowBuf(pScreen);
if (pBuf->pPixmap) {
DamageUnregister(&pBuf->pPixmap->drawable, pBuf->pDamage);
pBuf->update = 0;
pBuf->window = 0;
pBuf->randr = 0;
pBuf->closure = 0;
pBuf->pPixmap = 0;
}
RemoveBlockAndWakeupHandlers(shadowBlockHandler, shadowWakeupHandler,
(pointer) pScreen);
}
static Bool
shadowCloseScreen(int i, ScreenPtr pScreen)
{
shadowBuf(pScreen);
unwrap(pBuf, pScreen, GetImage);
unwrap(pBuf, pScreen, CloseScreen);
shadowRemove(pScreen, pBuf->pPixmap);
DamageDestroy(pBuf->pDamage);
#ifdef BACKWARDS_COMPATIBILITY
REGION_UNINIT(pScreen, &pBuf->damage); /* bc */
#endif
if (pBuf->pPixmap)
pScreen->DestroyPixmap(pBuf->pPixmap);
xfree(pBuf);
return pScreen->CloseScreen(i, pScreen);
}
static Bool
shadowCloseScreen(ScreenPtr pScreen)
{
shadowBuf(pScreen);
unwrap(pBuf, pScreen, GetImage);
unwrap(pBuf, pScreen, CloseScreen);
shadowRemove(pScreen, pBuf->pPixmap);
DamageDestroy(pBuf->pDamage);
#ifdef BACKWARDS_COMPATIBILITY
RegionUninit(&pBuf->damage); /* bc */
#endif
if (pBuf->pPixmap)
pScreen->DestroyPixmap(pBuf->pPixmap);
free(pBuf);
return pScreen->CloseScreen(pScreen);
}
Bool
shadowAdd(ScreenPtr pScreen, PixmapPtr pPixmap, ShadowUpdateProc update,
ShadowWindowProc window, ShadowPreupdateProc preupdate,
int randr, void *closure)
{
shadowBuf(pScreen);
if (!RegisterBlockAndWakeupHandlers(shadowBlockHandler, shadowWakeupHandler,
(pointer)pScreen))
return FALSE;
/*
* Map simple rotation values to bitmasks; fortunately,
* these are all unique
*/
switch (randr) {
case 0:
randr = SHADOW_ROTATE_0;
break;
case 90:
randr = SHADOW_ROTATE_90;
break;
case 180:
randr = SHADOW_ROTATE_180;
break;
case 270:
randr = SHADOW_ROTATE_270;
break;
}
pBuf->update = update;
pBuf->window = window;
if (preupdate)
pBuf->ready_to_update = preupdate;
else
pBuf->ready_to_update = dummyPreupdate;
pBuf->randr = randr;
pBuf->closure = 0;
pBuf->pPixmap = pPixmap;
DamageRegister(&pPixmap->drawable, pBuf->pDamage);
return TRUE;
}
