Add API to enable mipmaps on Bitmap

Bug #7353771

This API can be used when scaling large images down to a small size
to get nicer looking results.

Change-Id: If09087eed36077eee5355f6047a3ca67747d7d9e

3 files changed, 86 insertions, 0 deletions

diff --git a/tests/HwAccelerationTest/AndroidManifest.xml b/tests/HwAccelerationTest/AndroidManifest.xml
index 4cb409d..9118aea 100644
--- a/tests/HwAccelerationTest/AndroidManifest.xml
+++ b/tests/HwAccelerationTest/AndroidManifest.xml
@@ -33,6 +33,15 @@
         <meta-data android:name="android.graphics.renderThread" android:value="true" />
 
         <activity
+                android:name="MipMapActivity"
+                android:label="_MipMap">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+
+        <activity
                 android:name="PathOffsetActivity"
                 android:label="_PathOffset">
             <intent-filter>
diff --git a/tests/HwAccelerationTest/res/drawable-nodpi/very_large_photo.jpg b/tests/HwAccelerationTest/res/drawable-nodpi/very_large_photo.jpg
new file mode 100644
index 0000000..7f047b1
--- /dev/null
+++ b/tests/HwAccelerationTest/res/drawable-nodpi/very_large_photo.jpg
diff --git a/tests/HwAccelerationTest/src/com/android/test/hwui/MipMapActivity.java b/tests/HwAccelerationTest/src/com/android/test/hwui/MipMapActivity.java
new file mode 100644
index 0000000..1034649
--- /dev/null
+++ b/tests/HwAccelerationTest/src/com/android/test/hwui/MipMapActivity.java
@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2010 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.test.hwui;
+
+import android.app.Activity;
+import android.content.Context;
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
+import android.graphics.Canvas;
+import android.graphics.Paint;
+import android.graphics.PorterDuff;
+import android.graphics.PorterDuffXfermode;
+import android.os.Bundle;
+import android.util.Log;
+import android.view.Gravity;
+import android.view.View;
+import android.view.animation.Animation;
+import android.view.animation.ScaleAnimation;
+import android.widget.FrameLayout;
+
+@SuppressWarnings({"UnusedDeclaration"})
+public class MipMapActivity extends Activity {
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        final BitmapsView view = new BitmapsView(this);
+        setContentView(view);
+    }
+
+    static class BitmapsView extends View {
+        private Paint mBitmapPaint;
+        private final Bitmap mBitmap1;
+        private final Bitmap mBitmap2;
+
+        BitmapsView(Context c) {
+            super(c);
+
+            mBitmap1 = BitmapFactory.decodeResource(c.getResources(), R.drawable.very_large_photo);
+            mBitmap2 = BitmapFactory.decodeResource(c.getResources(), R.drawable.very_large_photo);
+
+            mBitmap1.setHasMipMap(true);
+
+            mBitmapPaint = new Paint();
+            mBitmapPaint.setFilterBitmap(true);
+        }
+
+        @Override
+        protected void onDraw(Canvas canvas) {
+            super.onDraw(canvas);
+
+            canvas.save();
+            canvas.scale(0.3f, 0.3f);
+            canvas.drawBitmap(mBitmap1, 0, 0, mBitmapPaint);
+            canvas.restore();
+
+            canvas.save();
+            canvas.translate(mBitmap1.getWidth() * 0.3f + 96.0f, 0.0f);
+            canvas.scale(0.3f, 0.3f);
+            canvas.drawBitmap(mBitmap2, 0, 0, mBitmapPaint);
+            canvas.restore();
+        }
+    }
+}