Reduce amount of garbage created when flipping StackViews (e80202d5) · Commits · e / os / android_frameworks_base

core/java/android/widget/StackView.java

+22 −17

Original line number	Diff line number	Diff line
		@@ -100,6 +100,8 @@ public class StackView extends AdapterViewAnimator {

		private static final int FRAME_PADDING = 4;

		private final Rect mTouchRect = new Rect();

		/**
		* These variables are all related to the current state of touch interaction
		* with the stack
		@@ -531,7 +533,6 @@ public class StackView extends AdapterViewAnimator {
		return true;
		}

		private final Rect touchRect = new Rect();
		private void onSecondaryPointerUp(MotionEvent ev) {
		final int activePointerIndex = ev.getActionIndex();
		final int pointerId = ev.getPointerId(activePointerIndex);
		@@ -552,8 +553,8 @@ public class StackView extends AdapterViewAnimator {
		float x = ev.getX(index);
		float y = ev.getY(index);

		touchRect.set(v.getLeft(), v.getTop(), v.getRight(), v.getBottom());
		if (touchRect.contains(Math.round(x), Math.round(y))) {
		mTouchRect.set(v.getLeft(), v.getTop(), v.getRight(), v.getBottom());
		if (mTouchRect.contains(Math.round(x), Math.round(y))) {
		float oldX = ev.getX(activePointerIndex);
		float oldY = ev.getY(activePointerIndex);

		@@ -1049,18 +1050,23 @@ public class StackView extends AdapterViewAnimator {
		private static final int RES_OUT = 0;
		private static final int CLICK_FEEDBACK = 1;
		private float mDensity;
		private BlurMaskFilter mSmallBlurMaskFilter;
		private BlurMaskFilter mLargeBlurMaskFilter;
		private final Canvas mCanvas = new Canvas();
		private final Canvas mMaskCanvas = new Canvas();
		private final int[] mTmpXY = new int[2];
		private final Matrix mIdentityMatrix = new Matrix();

		HolographicHelper(Context context) {
		initializePaints(context);
		}

		void initializePaints(Context context) {
		mDensity = context.getResources().getDisplayMetrics().density;

		mHolographicPaint.setFilterBitmap(true);
		mHolographicPaint.setMaskFilter(TableMaskFilter.CreateClipTable(0, 30));
		mErasePaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_OUT));
		mErasePaint.setFilterBitmap(true);

		mSmallBlurMaskFilter = new BlurMaskFilter(2 * mDensity, BlurMaskFilter.Blur.NORMAL);
		mLargeBlurMaskFilter = new BlurMaskFilter(4 * mDensity, BlurMaskFilter.Blur.NORMAL);
		}

		Bitmap createOutline(View v) {
		@@ -1070,10 +1076,10 @@ public class StackView extends AdapterViewAnimator {
		Bitmap createOutline(View v, int type) {
		if (type == RES_OUT) {
		mHolographicPaint.setColor(0xff6699ff);
		mBlurPaint.setMaskFilter(new BlurMaskFilter(2*mDensity, BlurMaskFilter.Blur.NORMAL));
		mBlurPaint.setMaskFilter(mSmallBlurMaskFilter);
		} else if (type == CLICK_FEEDBACK) {
		mHolographicPaint.setColor(0x886699ff);
		mBlurPaint.setMaskFilter(new BlurMaskFilter(4*mDensity, BlurMaskFilter.Blur.NORMAL));
		mBlurPaint.setMaskFilter(mLargeBlurMaskFilter);
		}

		if (v.getMeasuredWidth() == 0 \|\| v.getMeasuredHeight() == 0) {
		@@ -1082,7 +1088,7 @@ public class StackView extends AdapterViewAnimator {

		Bitmap bitmap = Bitmap.createBitmap(v.getMeasuredWidth(), v.getMeasuredHeight(),
		Bitmap.Config.ARGB_8888);
		Canvas canvas = new Canvas(bitmap);
		mCanvas.setBitmap(bitmap);

		float rotationX = v.getRotationX();
		float rotation = v.getRotation();
		@@ -1090,23 +1096,22 @@ public class StackView extends AdapterViewAnimator {
		v.setRotationX(0);
		v.setRotation(0);
		v.setTranslationY(0);
		v.draw(canvas);
		v.draw(mCanvas);
		v.setRotationX(rotationX);
		v.setRotation(rotation);
		v.setTranslationY(translationY);

		drawOutline(canvas, bitmap);
		drawOutline(mCanvas, bitmap);
		return bitmap;
		}

		final Matrix id = new Matrix();
		void drawOutline(Canvas dest, Bitmap src) {
		int[] xy = new int[2];
		final int[] xy = mTmpXY;
		Bitmap mask = src.extractAlpha(mBlurPaint, xy);
		Canvas maskCanvas = new Canvas(mask);
		maskCanvas.drawBitmap(src, -xy[0], -xy[1], mErasePaint);
		mMaskCanvas.setBitmap(mask);
		mMaskCanvas.drawBitmap(src, -xy[0], -xy[1], mErasePaint);
		dest.drawColor(0, PorterDuff.Mode.CLEAR);
		dest.setMatrix(id);
		dest.setMatrix(mIdentityMatrix);
		dest.drawBitmap(mask, xy[0], xy[1], mHolographicPaint);
		mask.recycle();
		}