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Commit 526f0a0e authored by Mathias Agopian's avatar Mathias Agopian
Browse files

Fix a hang in SF caused by invalid transform matrix from the WM 

WindowManager could create by transforms because of divide by zero.

Bug: 5422468
Change-Id: I782f87ebb78b5ff23750e22837f36ca6cfed1f2f
parent 0d0fba45

services/java/com/android/server/wm/WindowState.java

+5 −1
Original line number Diff line number Diff line
@@ -1120,10 +1120,14 @@ final class WindowState implements WindowManagerPolicy.WindowState { 
                // window's center).

                final float w = frame.width();

                final float h = frame.height();

                if (w>=1 && h>=1) {

                    tmpMatrix.setScale(1 + 2/w, 1 + 2/h, w/2, h/2);

                } else {

                    tmpMatrix.reset();

                }

            } else {

                tmpMatrix.reset();

            }

            tmpMatrix.postScale(mGlobalScale, mGlobalScale);

            if (selfTransformation) {

                tmpMatrix.postConcat(mTransformation.getMatrix());