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Fix a bug where non-cropped layer could be scaled incorrectly 

If a layer is not cropped but its bounds are outside of the
viewport (i.e.: clipped), the crop rectangle passed to
hw composer would be invalid because it started invalid
in the first place (to indicate "no crop").

Bug: 10410944
Change-Id: I4ae4d49a1adef0be7fa4304ecf84b1a5b7d03fe0
This commit is contained in:
Mathias Agopian 2013-08-20 21:41:07 -07:00
parent 4f4f094348
commit 0e8f1443b8
1 changed files with 7 additions and 1 deletions
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8
services/surfaceflinger/Layer.cpp
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@ -287,7 +287,13 @@ FloatRect Layer::computeCrop(const sp<const DisplayDevice>& hw) const {
// pixels in the buffer.
// FIXME: the 3 lines below can produce slightly incorrect clipping when we have
// a viewport clipping and a window transform. we should use floating point to fix this.
Rect activeCrop(s.transform.transform(s.active.crop));
Rect activeCrop(s.active.w, s.active.h);
if (!s.active.crop.isEmpty()) {
activeCrop = s.active.crop;
}
activeCrop = s.transform.transform(activeCrop);
activeCrop.intersect(hw->getViewport(), &activeCrop);
activeCrop = s.transform.inverse().transform(activeCrop);