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Some optimizations in blur outline generator

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1) Using ALPHA_8 as the start and end bitmap. This removes one extra
   bitmap generation step
2) Using ByteBuffer on ALPHA_8 bitmap for clipAlpha. This allows us
   to use byteArray instead of intArray for representing pixels

Change-Id: I1b654c439fd491b6b91180ddc562bb97fad857aa
This commit is contained in:
Sunny Goyal
2016-09-02 11:23:49 -07:00
parent 35908f9e67
commit f28e6afafd
5 changed files with 37 additions and 41 deletions
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src/com/android/launcher3/graphics/DragPreviewProvider.java
+2 -5
View File
@@ -27,7 +27,6 @@ import android.widget.TextView;
import com.android.launcher3.HolographicOutlineHelper;
import com.android.launcher3.Launcher;
import com.android.launcher3.PreloadIconDrawable;
import com.android.launcher3.R;
import com.android.launcher3.Workspace;
import com.android.launcher3.config.ProviderConfig;
import com.android.launcher3.folder.FolderIcon;
@@ -134,14 +133,12 @@ public class DragPreviewProvider {
* Responsibility for the bitmap is transferred to the caller.
*/
public Bitmap createDragOutline(Canvas canvas) {
final int outlineColor = mView.getResources().getColor(R.color.outline_color);
final Bitmap b = Bitmap.createBitmap(mView.getWidth() + DRAG_BITMAP_PADDING,
mView.getHeight() + DRAG_BITMAP_PADDING, Bitmap.Config.ARGB_8888);
mView.getHeight() + DRAG_BITMAP_PADDING, Bitmap.Config.ALPHA_8);
canvas.setBitmap(b);
drawDragView(canvas);
HolographicOutlineHelper.obtain(mView.getContext())
.applyExpensiveOutlineWithBlur(b, canvas, outlineColor, outlineColor);
.applyExpensiveOutlineWithBlur(b, canvas);
canvas.setBitmap(null);
return b;
}