Initial checkin of AOSP Messaging app.

b/23110861

Change-Id: I11db999bd10656801e618f78ab2b2ef74136fff1

src/com/android/messaging/ui/OrientedBitmapDrawable.java

@@ -0,0 +1,104 @@
+/*
+ * Copyright (C) 2015 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.messaging.ui;
+
+import android.content.res.Resources;
+import android.graphics.Bitmap;
+import android.graphics.Canvas;
+import android.graphics.Matrix;
+import android.graphics.Rect;
+import android.graphics.RectF;
+import android.graphics.drawable.BitmapDrawable;
+import android.view.Gravity;
+
+import com.android.messaging.util.exif.ExifInterface;
+
+/**
+ * A drawable that draws a bitmap in a flipped or rotated orientation without having to adjust the
+ * bitmap
+ */
+public class OrientedBitmapDrawable extends BitmapDrawable {
+    private final ExifInterface.OrientationParams mOrientationParams;
+    private final Rect mDstRect;
+    private int mCenterX;
+    private int mCenterY;
+    private boolean mApplyGravity;
+
+    public static BitmapDrawable create(final int orientation, Resources res, Bitmap bitmap) {
+        if (orientation <= ExifInterface.Orientation.TOP_LEFT) {
+            // No need to adjust the bitmap, so just use a regular BitmapDrawable
+            return new BitmapDrawable(res, bitmap);
+        } else {
+            // Create an oriented bitmap drawable
+            return new OrientedBitmapDrawable(orientation, res, bitmap);
+        }
+    }
+
+    private OrientedBitmapDrawable(final int orientation, Resources res, Bitmap bitmap) {
+        super(res, bitmap);
+        mOrientationParams = ExifInterface.getOrientationParams(orientation);
+        mApplyGravity = true;
+        mDstRect = new Rect();
+    }
+
+    @Override
+    public int getIntrinsicWidth() {
+        if (mOrientationParams.invertDimensions) {
+            return super.getIntrinsicHeight();
+        }
+        return super.getIntrinsicWidth();
+    }
+
+    @Override
+    public int getIntrinsicHeight() {
+        if (mOrientationParams.invertDimensions) {
+            return super.getIntrinsicWidth();
+        }
+        return super.getIntrinsicHeight();
+    }
+
+    @Override
+    protected void onBoundsChange(Rect bounds) {
+        super.onBoundsChange(bounds);
+        mApplyGravity = true;
+    }
+
+    @Override
+    public void draw(Canvas canvas) {
+        if (mApplyGravity) {
+            Gravity.apply(getGravity(), getIntrinsicWidth(), getIntrinsicHeight(), getBounds(),
+                    mDstRect);
+            mCenterX = mDstRect.centerX();
+            mCenterY = mDstRect.centerY();
+            if (mOrientationParams.invertDimensions) {
+                final Matrix matrix = new Matrix();
+                matrix.setRotate(mOrientationParams.rotation, mCenterX, mCenterY);
+                final RectF rotatedRect = new RectF(mDstRect);
+                matrix.mapRect(rotatedRect);
+                mDstRect.set((int) rotatedRect.left, (int) rotatedRect.top, (int) rotatedRect.right,
+                        (int) rotatedRect.bottom);
+            }
+
+            mApplyGravity = false;
+        }
+        canvas.save();
+        canvas.scale(mOrientationParams.scaleX, mOrientationParams.scaleY, mCenterX, mCenterY);
+        canvas.rotate(mOrientationParams.rotation, mCenterX, mCenterY);
+        canvas.drawBitmap(getBitmap(), (Rect) null, mDstRect, getPaint());
+        canvas.restore();
+    }
+}