Android/frameworks_base
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Force invalidates on non-visible views to traverse the hierarchy

Browse Source 
An optimization prunes invalidates on views which are not inside their
parent's bounds. This works in most cases, but it is possible to run
a situation where a view has been invalidated (and is thus waiting to
be redrawn), but the pruning logic ensures that that draw call
will not happen. Further, when/if the view comes into the bounds
of its parent again, it may still not be redrawn, because now future
invalidates on the view are noop'd because it is already in an invalidated
state (and thus will not propagate invalidates up the hierarchy).

The fix is to remove the optitmization. This will cause some overhead
sending the invalidation request up to the view root, but this
overhead is minimal (and only extra for cases of out-of-bounds views),
and the more expensive part of rendering these views will still not be done
since the view root will avoid re-drawing the hierarchy when the dirty
rectangle is empty.

Issue #6773607 Layered views animating from offscreen sometimes remain invisible

Change-Id: Ia2c1a2b9d3e7f267253cb325ccceff1e7fdbe8bd
This commit is contained in:
Chet Haase
2012-07-03 14:17:57 -07:00
parent 9dc2cc53ac
commit 05e91ed5a7
2 changed files with 17 additions and 13 deletions
Download Patch File Download Diff File Expand all files Collapse all files

28
core/java/android/view/ViewGroup.java
View File

@@ -4036,21 +4036,23 @@ public abstract class ViewGroup extends View implements ViewParent, ViewManager
final int left = mLeft;
final int top = mTop;
if ((mGroupFlags & FLAG_CLIP_CHILDREN) != FLAG_CLIP_CHILDREN ||
dirty.intersect(0, 0, mRight - left, mBottom - top) ||
(mPrivateFlags & DRAW_ANIMATION) == DRAW_ANIMATION) {
mPrivateFlags &= ~DRAWING_CACHE_VALID;
location[CHILD_LEFT_INDEX] = left;
location[CHILD_TOP_INDEX] = top;
if (mLayerType != LAYER_TYPE_NONE) {
mPrivateFlags |= INVALIDATED;
mLocalDirtyRect.union(dirty);
if ((mGroupFlags & FLAG_CLIP_CHILDREN) == FLAG_CLIP_CHILDREN) {
if (!dirty.intersect(0, 0, mRight - left, mBottom - top)) {
dirty.setEmpty();
}
return mParent;
}
mPrivateFlags &= ~DRAWING_CACHE_VALID;
location[CHILD_LEFT_INDEX] = left;
location[CHILD_TOP_INDEX] = top;
if (mLayerType != LAYER_TYPE_NONE) {
mPrivateFlags |= INVALIDATED;
mLocalDirtyRect.union(dirty);
}
return mParent;
} else {
mPrivateFlags &= ~DRAWN & ~DRAWING_CACHE_VALID;

2
core/java/android/view/ViewRootImpl.java
View File

@@ -868,6 +868,8 @@ public final class ViewRootImpl implements ViewParent,
if (dirty == null) {
invalidate();
return null;
} else if (dirty.isEmpty()) {
return null;
}
if (mCurScrollY != 0 || mTranslator != null) {