Shrink user profile bitmaps to 48dp^2.

Can save megabytes of memory.

Bug: 16371371
Change-Id: Ifec5cff3a3376d045ee4e3b605edeb8d9ac93799

1 files changed, 52 insertions, 0 deletions

diff --git a/packages/SystemUI/src/com/android/systemui/BitmapHelper.java b/packages/SystemUI/src/com/android/systemui/BitmapHelper.java
new file mode 100644
index 0000000..008b422
--- /dev/null
+++ b/packages/SystemUI/src/com/android/systemui/BitmapHelper.java
@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+
+package com.android.systemui;
+
+import android.graphics.Bitmap;
+import android.graphics.BitmapShader;
+import android.graphics.Canvas;
+import android.graphics.Matrix;
+import android.graphics.Paint;
+import android.graphics.RectF;
+import android.graphics.Shader;
+
+public class BitmapHelper {
+    /**
+     * Generate a new bitmap (width x height pixels, ARGB_8888) with the input bitmap scaled
+     * to fit and clipped to an inscribed circle.
+     * @param input Bitmap to resize and clip
+     * @param width Width of output bitmap (and diameter of circle)
+     * @param height Height of output bitmap
+     * @return A shiny new bitmap for you to use
+     */
+    public static Bitmap createCircularClip(Bitmap input, int width, int height) {
+        final int inWidth = input.getWidth();
+        final int inHeight = input.getHeight();
+        final Bitmap output = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
+        final Canvas canvas = new Canvas(output);
+        final Paint paint = new Paint();
+        paint.setShader(new BitmapShader(input, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP));
+        paint.setAntiAlias(true);
+        final RectF srcRect = new RectF(0, 0, inWidth, inHeight);
+        final RectF dstRect = new RectF(0, 0, width, height);
+        final Matrix m = new Matrix();
+        m.setRectToRect(srcRect, dstRect, Matrix.ScaleToFit.CENTER);
+        canvas.setMatrix(m);
+        canvas.drawCircle(inWidth / 2, inHeight / 2, inWidth / 2, paint);
+        return output;
+    }
+}