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/*
* Copyright (C) 2013 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.photos.shims;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.ColorFilter;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.PixelFormat;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import com.android.gallery3d.data.MediaItem;
import com.android.gallery3d.ui.BitmapLoader;
import com.android.gallery3d.util.Future;
import com.android.gallery3d.util.FutureListener;
import com.android.gallery3d.util.ThreadPool;
import com.android.photos.data.GalleryBitmapPool;
public class BitmapJobDrawable extends Drawable implements Runnable {
private ThumbnailLoader mLoader;
private MediaItem mItem;
private Bitmap mBitmap;
private Paint mPaint = new Paint();
private Matrix mDrawMatrix = new Matrix();
private int mRotation = 0;
public BitmapJobDrawable() {
}
public void setMediaItem(MediaItem item) {
if (mItem == item) return;
if (mLoader != null) {
mLoader.cancelLoad();
}
mItem = item;
if (mBitmap != null) {
GalleryBitmapPool.getInstance().put(mBitmap);
mBitmap = null;
}
if (mItem != null) {
// TODO: Figure out why ThumbnailLoader doesn't like to be re-used
mLoader = new ThumbnailLoader(this);
mLoader.startLoad();
mRotation = mItem.getRotation();
}
invalidateSelf();
}
@Override
public void run() {
Bitmap bitmap = mLoader.getBitmap();
if (bitmap != null) {
mBitmap = bitmap;
updateDrawMatrix();
}
}
@Override
protected void onBoundsChange(Rect bounds) {
super.onBoundsChange(bounds);
updateDrawMatrix();
}
@Override
public void draw(Canvas canvas) {
Rect bounds = getBounds();
if (mBitmap != null) {
canvas.save();
canvas.clipRect(bounds);
canvas.concat(mDrawMatrix);
canvas.rotate(mRotation, bounds.centerX(), bounds.centerY());
canvas.drawBitmap(mBitmap, 0, 0, mPaint);
canvas.restore();
} else {
mPaint.setColor(0xFFCCCCCC);
canvas.drawRect(bounds, mPaint);
}
}
private void updateDrawMatrix() {
Rect bounds = getBounds();
if (mBitmap == null || bounds.isEmpty()) {
mDrawMatrix.reset();
return;
}
float scale;
float dx = 0, dy = 0;
int dwidth = mBitmap.getWidth();
int dheight = mBitmap.getHeight();
int vwidth = bounds.width();
int vheight = bounds.height();
// Calculates a matrix similar to ScaleType.CENTER_CROP
if (dwidth * vheight > vwidth * dheight) {
scale = (float) vheight / (float) dheight;
dx = (vwidth - dwidth * scale) * 0.5f;
} else {
scale = (float) vwidth / (float) dwidth;
dy = (vheight - dheight * scale) * 0.5f;
}
mDrawMatrix.setScale(scale, scale);
mDrawMatrix.postTranslate((int) (dx + 0.5f), (int) (dy + 0.5f));
invalidateSelf();
}
@Override
public int getIntrinsicWidth() {
return MediaItem.getTargetSize(MediaItem.TYPE_MICROTHUMBNAIL);
}
@Override
public int getIntrinsicHeight() {
return MediaItem.getTargetSize(MediaItem.TYPE_MICROTHUMBNAIL);
}
@Override
public int getOpacity() {
Bitmap bm = mBitmap;
return (bm == null || bm.hasAlpha() || mPaint.getAlpha() < 255) ?
PixelFormat.TRANSLUCENT : PixelFormat.OPAQUE;
}
@Override
public void setAlpha(int alpha) {
int oldAlpha = mPaint.getAlpha();
if (alpha != oldAlpha) {
mPaint.setAlpha(alpha);
invalidateSelf();
}
}
@Override
public void setColorFilter(ColorFilter cf) {
mPaint.setColorFilter(cf);
invalidateSelf();
}
private static class ThumbnailLoader extends BitmapLoader {
private static final ThreadPool sThreadPool = new ThreadPool(0, 2);
private BitmapJobDrawable mParent;
public ThumbnailLoader(BitmapJobDrawable parent) {
mParent = parent;
}
@Override
protected Future<Bitmap> submitBitmapTask(FutureListener<Bitmap> l) {
return sThreadPool.submit(
mParent.mItem.requestImage(MediaItem.TYPE_MICROTHUMBNAIL), this);
}
@Override
protected void onLoadComplete(Bitmap bitmap) {
mParent.scheduleSelf(mParent, 0);
}
}
}
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