Potential fix for out-of-date hardware layers
Might also further help bug where IMG GPU slows
down when rendering into hardware layers that are
not rendered to framebuffer
Bugs # 5614712, 5616414, 5628998
Change-Id: I85ff11889aa28f6985dd68e7f1e57d0da2150aa5
diff --git a/src/com/android/launcher2/Workspace.java b/src/com/android/launcher2/Workspace.java
index 0598cd9..fd5a3fc 100644
--- a/src/com/android/launcher2/Workspace.java
+++ b/src/com/android/launcher2/Workspace.java
@@ -57,6 +57,7 @@
import android.view.DragEvent;
import android.view.MotionEvent;
import android.view.View;
+import android.view.ViewConfiguration;
import android.view.ViewGroup;
import android.view.animation.DecelerateInterpolator;
import android.widget.ImageView;
@@ -1280,21 +1281,34 @@
return (mBackground != null && mBackgroundAlpha > 0.0f && mDrawBackground);
}
- @Override
- protected void dispatchDraw(Canvas canvas) {
+ public void scrollTo (int x, int y) {
+ super.scrollTo(x, y);
+ syncChildrenLayersEnabledOnVisiblePages();
+ }
+
+ // This method just applies the value mChildrenLayersEnabled to all the pages that
+ // will be rendered on the next frame.
+ // We do this because calling setChildrenLayersEnabled on a view that's not
+ // visible/rendered causes slowdowns on some graphics cards
+ private void syncChildrenLayersEnabledOnVisiblePages() {
if (mChildrenLayersEnabled) {
getVisiblePages(mTempVisiblePagesRange);
final int leftScreen = mTempVisiblePagesRange[0];
final int rightScreen = mTempVisiblePagesRange[1];
if (leftScreen != -1 && rightScreen != -1) {
- // calling setChildrenLayersEnabled on a view that's not visible/rendered
- // causes slowdowns on some graphics cards, so we set it here to be sure
- // it's only called when it's safe (ie when the view will be rendered)
for (int i = leftScreen; i <= rightScreen; i++) {
- ((ViewGroup)getPageAt(i)).setChildrenLayersEnabled(true);
+ ViewGroup page = (ViewGroup) getPageAt(i);
+ if (page.getVisibility() == VISIBLE &&
+ page.getAlpha() > ViewConfiguration.ALPHA_THRESHOLD) {
+ ((ViewGroup)getPageAt(i)).setChildrenLayersEnabled(true);
+ }
}
}
}
+ }
+
+ @Override
+ protected void dispatchDraw(Canvas canvas) {
super.dispatchDraw(canvas);
if (mInScrollArea && !LauncherApplication.isScreenLarge()) {
@@ -1723,6 +1737,7 @@
b * mNewBackgroundAlphaMultipliers[i]);
cl.setFastAlpha(a * mOldAlphas[i] + b * mNewAlphas[i]);
}
+ syncChildrenLayersEnabledOnVisiblePages();
}
});
@@ -1760,6 +1775,7 @@
// Fade the background gradient away
animateBackgroundGradient(0f, true);
}
+ syncChildrenLayersEnabledOnVisiblePages();
}
/**