/**
* If the pixmap is currently dirty, this copies at least the dirty area from
* the system memory copy to the framebuffer memory copy. Both areas must be
* allocated.
*/
static void
exaCopyDirtyToFb (PixmapPtr pPixmap)
{
ExaScreenPriv (pPixmap->drawable.pScreen);
ExaPixmapPriv (pPixmap);
RegionPtr pRegion = DamageRegion (pExaPixmap->pDamage);
CARD8 *save_ptr;
int save_pitch;
BoxPtr pBox = REGION_RECTS(pRegion);
int nbox = REGION_NUM_RECTS(pRegion);
Bool do_sync = FALSE;
save_ptr = pPixmap->devPrivate.ptr;
save_pitch = pPixmap->devKind;
pPixmap->devPrivate.ptr = pExaPixmap->fb_ptr;
pPixmap->devKind = pExaPixmap->fb_pitch;
while (nbox--) {
pBox->x1 = max(pBox->x1, 0);
pBox->y1 = max(pBox->y1, 0);
pBox->x2 = min(pBox->x2, pPixmap->drawable.width);
pBox->y2 = min(pBox->y2, pPixmap->drawable.height);
if (pBox->x1 >= pBox->x2 || pBox->y1 >= pBox->y2)
continue;
if (pExaScr->info->UploadToScreen == NULL ||
!pExaScr->info->UploadToScreen (pPixmap,
pBox->x1, pBox->y1,
pBox->x2 - pBox->x1,
pBox->y2 - pBox->y1,
pExaPixmap->sys_ptr
+ pBox->y1 * pExaPixmap->sys_pitch
+ pBox->x1 * pPixmap->drawable.bitsPerPixel / 8,
pExaPixmap->sys_pitch))
{
exaPrepareAccess(&pPixmap->drawable, EXA_PREPARE_DEST);
exaMemcpyBox (pPixmap, pBox,
pExaPixmap->sys_ptr, pExaPixmap->sys_pitch,
pExaPixmap->fb_ptr, pExaPixmap->fb_pitch);
exaFinishAccess(&pPixmap->drawable, EXA_PREPARE_DEST);
}
else
do_sync = TRUE;
pBox++;
}
if (do_sync)
exaMarkSync (pPixmap->drawable.pScreen);
pPixmap->devPrivate.ptr = save_ptr;
pPixmap->devKind = save_pitch;
/* The previously damaged bits are now no longer damaged but valid */
REGION_UNION(pPixmap->drawable.pScreen,
&pExaPixmap->validReg, &pExaPixmap->validReg, pRegion);
DamageEmpty (pExaPixmap->pDamage);
}
/**
* If the pixmap is currently dirty, this copies at least the dirty area from
* the framebuffer memory copy to the system memory copy. Both areas must be
* allocated.
*/
static void
exaCopyDirtyToSys (PixmapPtr pPixmap)
{
ExaScreenPriv (pPixmap->drawable.pScreen);
ExaPixmapPriv (pPixmap);
RegionPtr pRegion = DamageRegion (pExaPixmap->pDamage);
CARD8 *save_ptr;
int save_pitch;
BoxPtr pBox = REGION_RECTS(pRegion);
int nbox = REGION_NUM_RECTS(pRegion);
Bool do_sync = FALSE;
save_ptr = pPixmap->devPrivate.ptr;
save_pitch = pPixmap->devKind;
pPixmap->devPrivate.ptr = pExaPixmap->fb_ptr;
pPixmap->devKind = pExaPixmap->fb_pitch;
while (nbox--) {
pBox->x1 = max(pBox->x1, 0);
pBox->y1 = max(pBox->y1, 0);
pBox->x2 = min(pBox->x2, pPixmap->drawable.width);
pBox->y2 = min(pBox->y2, pPixmap->drawable.height);
if (pBox->x1 >= pBox->x2 || pBox->y1 >= pBox->y2)
continue;
if (pExaScr->info->DownloadFromScreen == NULL ||
!pExaScr->info->DownloadFromScreen (pPixmap,
pBox->x1, pBox->y1,
pBox->x2 - pBox->x1,
pBox->y2 - pBox->y1,
pExaPixmap->sys_ptr
+ pBox->y1 * pExaPixmap->sys_pitch
+ pBox->x1 * pPixmap->drawable.bitsPerPixel / 8,
pExaPixmap->sys_pitch))
{
exaPrepareAccess(&pPixmap->drawable, EXA_PREPARE_SRC);
exaMemcpyBox (pPixmap, pBox,
pExaPixmap->fb_ptr, pExaPixmap->fb_pitch,
pExaPixmap->sys_ptr, pExaPixmap->sys_pitch);
exaFinishAccess(&pPixmap->drawable, EXA_PREPARE_SRC);
}
else
do_sync = TRUE;
pBox++;
}
/* Make sure the bits have actually landed, since we don't necessarily sync
* when accessing pixmaps in system memory.
*/
if (do_sync)
exaWaitSync (pPixmap->drawable.pScreen);
pPixmap->devPrivate.ptr = save_ptr;
pPixmap->devKind = save_pitch;
/* The previously damaged bits are now no longer damaged but valid */
REGION_UNION(pPixmap->drawable.pScreen,
&pExaPixmap->validReg, &pExaPixmap->validReg, pRegion);
DamageEmpty (pExaPixmap->pDamage);
}
/**
* If the pixmap is currently dirty, this copies at least the dirty area from
* FB to system or vice versa. Both areas must be allocated.
*/
static void
exaCopyDirty(ExaMigrationPtr migrate, RegionPtr pValidDst, RegionPtr pValidSrc,
Bool (*transfer) (PixmapPtr pPix, int x, int y, int w, int h,
char *sys, int sys_pitch), int fallback_index,
void (*sync) (ScreenPtr pScreen))
{
PixmapPtr pPixmap = migrate->pPix;
ExaPixmapPriv(pPixmap);
RegionPtr damage = DamageRegion(pExaPixmap->pDamage);
RegionRec CopyReg;
Bool save_use_gpu_copy;
int save_pitch;
BoxPtr pBox;
int nbox;
Bool access_prepared = FALSE;
Bool need_sync = FALSE;
/* Damaged bits are valid in current copy but invalid in other one */
if (pExaPixmap->use_gpu_copy) {
RegionUnion(&pExaPixmap->validFB, &pExaPixmap->validFB, damage);
RegionSubtract(&pExaPixmap->validSys, &pExaPixmap->validSys, damage);
}
else {
RegionUnion(&pExaPixmap->validSys, &pExaPixmap->validSys, damage);
RegionSubtract(&pExaPixmap->validFB, &pExaPixmap->validFB, damage);
}
RegionEmpty(damage);
/* Copy bits valid in source but not in destination */
RegionNull(&CopyReg);
RegionSubtract(&CopyReg, pValidSrc, pValidDst);
if (migrate->as_dst) {
ExaScreenPriv(pPixmap->drawable.pScreen);
/* XXX: The pending damage region will be marked as damaged after the
* operation, so it should serve as an upper bound for the region that
* needs to be synchronized for the operation. Unfortunately, this
* causes corruption in some cases, e.g. when starting compiz. See
* https://bugs.freedesktop.org/show_bug.cgi?id=12916 .
*/
if (pExaScr->optimize_migration) {
RegionPtr pending_damage = DamagePendingRegion(pExaPixmap->pDamage);
#if DEBUG_MIGRATE
if (RegionNil(pending_damage)) {
static Bool firsttime = TRUE;
if (firsttime) {
ErrorF("%s: Pending damage region empty!\n", __func__);
firsttime = FALSE;
}
}
#endif
/* Try to prevent destination valid region from growing too many
* rects by filling it up to the extents of the union of the
* destination valid region and the pending damage region.
*/
if (RegionNumRects(pValidDst) > 10) {
BoxRec box;
BoxPtr pValidExt, pDamageExt;
RegionRec closure;
pValidExt = RegionExtents(pValidDst);
pDamageExt = RegionExtents(pending_damage);
box.x1 = min(pValidExt->x1, pDamageExt->x1);
box.y1 = min(pValidExt->y1, pDamageExt->y1);
box.x2 = max(pValidExt->x2, pDamageExt->x2);
box.y2 = max(pValidExt->y2, pDamageExt->y2);
RegionInit(&closure, &box, 0);
RegionIntersect(&CopyReg, &CopyReg, &closure);
}
else
RegionIntersect(&CopyReg, &CopyReg, pending_damage);
}
/* The caller may provide a region to be subtracted from the calculated
* dirty region. This is to avoid migration of bits that don't
* contribute to the result of the operation.
*/
if (migrate->pReg)
RegionSubtract(&CopyReg, &CopyReg, migrate->pReg);
}
else {
/* The caller may restrict the region to be migrated for source pixmaps
* to what's relevant for the operation.
*/
if (migrate->pReg)
RegionIntersect(&CopyReg, &CopyReg, migrate->pReg);
}
pBox = RegionRects(&CopyReg);
nbox = RegionNumRects(&CopyReg);
save_use_gpu_copy = pExaPixmap->use_gpu_copy;
save_pitch = pPixmap->devKind;
pExaPixmap->use_gpu_copy = TRUE;
pPixmap->devKind = pExaPixmap->fb_pitch;
while (nbox--) {
pBox->x1 = max(pBox->x1, 0);
pBox->y1 = max(pBox->y1, 0);
pBox->x2 = min(pBox->x2, pPixmap->drawable.width);
pBox->y2 = min(pBox->y2, pPixmap->drawable.height);
if (pBox->x1 >= pBox->x2 || pBox->y1 >= pBox->y2)
continue;
if (!transfer || !transfer(pPixmap,
pBox->x1, pBox->y1,
pBox->x2 - pBox->x1,
pBox->y2 - pBox->y1,
(char *) (pExaPixmap->sys_ptr
+ pBox->y1 * pExaPixmap->sys_pitch
+
pBox->x1 *
pPixmap->drawable.bitsPerPixel /
8), pExaPixmap->sys_pitch)) {
if (!access_prepared) {
ExaDoPrepareAccess(pPixmap, fallback_index);
access_prepared = TRUE;
}
if (fallback_index == EXA_PREPARE_DEST) {
exaMemcpyBox(pPixmap, pBox,
pExaPixmap->sys_ptr, pExaPixmap->sys_pitch,
pPixmap->devPrivate.ptr, pPixmap->devKind);
}
else {
exaMemcpyBox(pPixmap, pBox,
pPixmap->devPrivate.ptr, pPixmap->devKind,
pExaPixmap->sys_ptr, pExaPixmap->sys_pitch);
}
}
else
need_sync = TRUE;
pBox++;
}
pExaPixmap->use_gpu_copy = save_use_gpu_copy;
pPixmap->devKind = save_pitch;
/* Try to prevent source valid region from growing too many rects by
* removing parts of it which are also in the destination valid region.
* Removing anything beyond that would lead to data loss.
*/
if (RegionNumRects(pValidSrc) > 20)
RegionSubtract(pValidSrc, pValidSrc, pValidDst);
/* The copied bits are now valid in destination */
RegionUnion(pValidDst, pValidDst, &CopyReg);
RegionUninit(&CopyReg);
if (access_prepared)
exaFinishAccess(&pPixmap->drawable, fallback_index);
else if (need_sync && sync)
sync(pPixmap->drawable.pScreen);
}
