105 lines
3.6 KiB
Java
105 lines
3.6 KiB
Java
/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.messaging.ui;
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import android.content.res.Resources;
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import android.graphics.Bitmap;
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import android.graphics.Canvas;
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import android.graphics.Matrix;
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import android.graphics.Rect;
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import android.graphics.RectF;
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import android.graphics.drawable.BitmapDrawable;
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import android.view.Gravity;
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import com.android.messaging.util.exif.ExifInterface;
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/**
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* A drawable that draws a bitmap in a flipped or rotated orientation without having to adjust the
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* bitmap
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*/
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public class OrientedBitmapDrawable extends BitmapDrawable {
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private final ExifInterface.OrientationParams mOrientationParams;
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private final Rect mDstRect;
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private int mCenterX;
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private int mCenterY;
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private boolean mApplyGravity;
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public static BitmapDrawable create(final int orientation, Resources res, Bitmap bitmap) {
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if (orientation <= ExifInterface.Orientation.TOP_LEFT) {
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// No need to adjust the bitmap, so just use a regular BitmapDrawable
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return new BitmapDrawable(res, bitmap);
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} else {
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// Create an oriented bitmap drawable
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return new OrientedBitmapDrawable(orientation, res, bitmap);
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}
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}
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private OrientedBitmapDrawable(final int orientation, Resources res, Bitmap bitmap) {
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super(res, bitmap);
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mOrientationParams = ExifInterface.getOrientationParams(orientation);
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mApplyGravity = true;
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mDstRect = new Rect();
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}
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@Override
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public int getIntrinsicWidth() {
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if (mOrientationParams.invertDimensions) {
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return super.getIntrinsicHeight();
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}
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return super.getIntrinsicWidth();
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}
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@Override
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public int getIntrinsicHeight() {
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if (mOrientationParams.invertDimensions) {
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return super.getIntrinsicWidth();
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}
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return super.getIntrinsicHeight();
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}
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@Override
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protected void onBoundsChange(Rect bounds) {
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super.onBoundsChange(bounds);
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mApplyGravity = true;
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}
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@Override
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public void draw(Canvas canvas) {
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if (mApplyGravity) {
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Gravity.apply(getGravity(), getIntrinsicWidth(), getIntrinsicHeight(), getBounds(),
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mDstRect);
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mCenterX = mDstRect.centerX();
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mCenterY = mDstRect.centerY();
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if (mOrientationParams.invertDimensions) {
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final Matrix matrix = new Matrix();
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matrix.setRotate(mOrientationParams.rotation, mCenterX, mCenterY);
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final RectF rotatedRect = new RectF(mDstRect);
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matrix.mapRect(rotatedRect);
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mDstRect.set((int) rotatedRect.left, (int) rotatedRect.top, (int) rotatedRect.right,
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(int) rotatedRect.bottom);
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}
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mApplyGravity = false;
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}
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canvas.save();
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canvas.scale(mOrientationParams.scaleX, mOrientationParams.scaleY, mCenterX, mCenterY);
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canvas.rotate(mOrientationParams.rotation, mCenterX, mCenterY);
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canvas.drawBitmap(getBitmap(), (Rect) null, mDstRect, getPaint());
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canvas.restore();
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}
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}
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