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Speeding up System UI pressed anim

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No longer saving a layer in KeyButtonView.onDraw,
which prevents a framebuffer readback on some
drivers and cuts ~3ms from render time per frame
(on some frames, up to ~10ms)

Change-Id: I5df56c20098f35c8ae6c25e76c67d81e9b72d1f7
This commit is contained in:
Michael Jurka
2012-01-12 05:48:19 -08:00
parent 81754949e0
commit 0b6586649f
1 changed files with 6 additions and 7 deletions
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13
packages/SystemUI/src/com/android/systemui/statusbar/policy/KeyButtonView.java
View File

@ -87,7 +87,7 @@ public class KeyButtonView extends ImageView {
mGlowBG = a.getDrawable(R.styleable.KeyButtonView_glowBackground);
if (mGlowBG != null) {
mDrawingAlpha = BUTTON_QUIESCENT_ALPHA;
setDrawingAlpha(BUTTON_QUIESCENT_ALPHA);
}
a.recycle();
@ -107,17 +107,13 @@ public class KeyButtonView extends ImageView {
final int h = getHeight();
canvas.scale(mGlowScale, mGlowScale, w*0.5f, h*0.5f);
mGlowBG.setBounds(0, 0, w, h);
mGlowBG.setAlpha((int)(mGlowAlpha * 255));
mGlowBG.setAlpha((int)(mDrawingAlpha * mGlowAlpha * 255));
mGlowBG.draw(canvas);
canvas.restore();
mRect.right = w;
mRect.bottom = h;
canvas.saveLayerAlpha(mRect, (int)(mDrawingAlpha * 255), Canvas.ALL_SAVE_FLAG);
}
super.onDraw(canvas);
if (mGlowBG != null) {
canvas.restore();
}
}
public float getDrawingAlpha() {
@ -127,8 +123,11 @@ public class KeyButtonView extends ImageView {
public void setDrawingAlpha(float x) {
if (mGlowBG == null) return;
// Calling setAlpha(int), which is an ImageView-specific
// method that's different from setAlpha(float). This sets
// the alpha on this ImageView's drawable directly
setAlpha((int) (x * 255));
mDrawingAlpha = x;
invalidate();
}
public float getGlowAlpha() {