Blanket copy of PhoneApp to services/Telephony.
First phase of splitting out InCallUI from PhoneApp.
Change-Id: I237341c4ff00e96c677caa4580b251ef3432931b
diff --git a/src/com/android/phone/BitmapUtils.java b/src/com/android/phone/BitmapUtils.java
new file mode 100644
index 0000000..94d4bf9
--- /dev/null
+++ b/src/com/android/phone/BitmapUtils.java
@@ -0,0 +1,161 @@
+/*
+ * Copyright (C) 2011 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.phone;
+
+import android.graphics.Bitmap;
+import android.os.SystemClock;
+import android.os.SystemProperties;
+import android.util.Log;
+
+
+/**
+ * Image effects used by the in-call UI.
+ */
+public class BitmapUtils {
+ private static final String TAG = "BitmapUtils";
+ private static final boolean DBG =
+ (PhoneGlobals.DBG_LEVEL >= 1) && (SystemProperties.getInt("ro.debuggable", 0) == 1);
+
+ /** This class is never instantiated. */
+ private BitmapUtils() {
+ }
+
+ //
+ // Gaussian blur effect
+ //
+ // gaussianBlur() and related methods are borrowed from
+ // BackgroundUtils.java in the Music2 code (which itself was based on
+ // code from the old Cooliris android Gallery app.)
+ //
+ // TODO: possibly consider caching previously-generated blurred bitmaps;
+ // see getAdaptedBitmap() and mAdaptedBitmapCache in the music app code.
+ //
+
+ private static final int RED_MASK = 0xff0000;
+ private static final int RED_MASK_SHIFT = 16;
+ private static final int GREEN_MASK = 0x00ff00;
+ private static final int GREEN_MASK_SHIFT = 8;
+ private static final int BLUE_MASK = 0x0000ff;
+
+ /**
+ * Creates a blurred version of the given Bitmap.
+ *
+ * @param bitmap the input bitmap, presumably a 96x96 pixel contact
+ * thumbnail.
+ */
+ public static Bitmap createBlurredBitmap(Bitmap bitmap) {
+ if (DBG) log("createBlurredBitmap()...");
+ long startTime = SystemClock.uptimeMillis();
+ if (bitmap == null) {
+ Log.w(TAG, "createBlurredBitmap: null bitmap");
+ return null;
+ }
+
+ if (DBG) log("- input bitmap: " + bitmap.getWidth() + " x " + bitmap.getHeight());
+
+ // The bitmap we pass to gaussianBlur() needs to have a width
+ // that's a power of 2, so scale up to 128x128.
+ final int scaledSize = 128;
+ bitmap = Bitmap.createScaledBitmap(bitmap,
+ scaledSize, scaledSize,
+ true /* filter */);
+ if (DBG) log("- after resize: " + bitmap.getWidth() + " x " + bitmap.getHeight());
+
+ bitmap = gaussianBlur(bitmap);
+ if (DBG) log("- after blur: " + bitmap.getWidth() + " x " + bitmap.getHeight());
+
+ long endTime = SystemClock.uptimeMillis();
+ if (DBG) log("createBlurredBitmap() done (elapsed = " + (endTime - startTime) + " msec)");
+ return bitmap;
+ }
+
+ /**
+ * Apply a gaussian blur filter, and return a new (blurred) bitmap
+ * that's the same size as the input bitmap.
+ *
+ * @param source input bitmap, whose width must be a power of 2
+ */
+ public static Bitmap gaussianBlur(Bitmap source) {
+ int width = source.getWidth();
+ int height = source.getHeight();
+ if (DBG) log("gaussianBlur(): input: " + width + " x " + height);
+
+ // Create a source and destination buffer for the image.
+ int numPixels = width * height;
+ int[] in = new int[numPixels];
+ int[] tmp = new int[numPixels];
+
+ // Get the source pixels as 32-bit ARGB.
+ source.getPixels(in, 0, width, 0, 0, width, height);
+
+ // Gaussian is a separable kernel, so it is decomposed into a horizontal
+ // and vertical pass.
+ // The filter function applies the kernel across each row and transposes
+ // the output.
+ // Hence we apply it twice to provide efficient horizontal and vertical
+ // convolution.
+ // The filter discards the alpha channel.
+ gaussianBlurFilter(in, tmp, width, height);
+ gaussianBlurFilter(tmp, in, width, height);
+
+ // Return a bitmap scaled to the desired size.
+ Bitmap filtered = Bitmap.createBitmap(in, width, height, Bitmap.Config.ARGB_8888);
+ source.recycle();
+ return filtered;
+ }
+
+ private static void gaussianBlurFilter(int[] in, int[] out, int width, int height) {
+ // This function is currently hardcoded to blur with RADIUS = 4.
+ // (If you change RADIUS, you'll have to change the weights[] too.)
+ final int RADIUS = 4;
+ final int[] weights = { 13, 23, 32, 39, 42, 39, 32, 23, 13}; // Adds up to 256
+ int inPos = 0;
+ int widthMask = width - 1; // width must be a power of two.
+ for (int y = 0; y < height; ++y) {
+ // Compute the alpha value.
+ int alpha = 0xff;
+ // Compute output values for the row.
+ int outPos = y;
+ for (int x = 0; x < width; ++x) {
+ int red = 0;
+ int green = 0;
+ int blue = 0;
+ for (int i = -RADIUS; i <= RADIUS; ++i) {
+ int argb = in[inPos + (widthMask & (x + i))];
+ int weight = weights[i+RADIUS];
+ red += weight *((argb & RED_MASK) >> RED_MASK_SHIFT);
+ green += weight *((argb & GREEN_MASK) >> GREEN_MASK_SHIFT);
+ blue += weight *(argb & BLUE_MASK);
+ }
+ // Output the current pixel.
+ out[outPos] = (alpha << 24) | ((red >> 8) << RED_MASK_SHIFT)
+ | ((green >> 8) << GREEN_MASK_SHIFT)
+ | (blue >> 8);
+ outPos += height;
+ }
+ inPos += width;
+ }
+ }
+
+ //
+ // Debugging
+ //
+
+ private static void log(String msg) {
+ Log.d(TAG, msg);
+ }
+}