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/*
* 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.gallery3d.ui;
import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.graphics.Canvas;
import com.android.gallery3d.common.BitmapUtils;
import com.android.gallery3d.data.BitmapPool;
import java.util.ArrayList;
public class BitmapTileProvider implements TileImageView.Model {
private final ScreenNail mScreenNail;
private final Bitmap[] mMipmaps;
private final Config mConfig;
private final int mImageWidth;
private final int mImageHeight;
private boolean mRecycled = false;
public BitmapTileProvider(Bitmap bitmap, int maxBackupSize) {
mImageWidth = bitmap.getWidth();
mImageHeight = bitmap.getHeight();
ArrayList<Bitmap> list = new ArrayList<Bitmap>();
list.add(bitmap);
while (bitmap.getWidth() > maxBackupSize
|| bitmap.getHeight() > maxBackupSize) {
bitmap = BitmapUtils.resizeBitmapByScale(bitmap, 0.5f, false);
list.add(bitmap);
}
mScreenNail = new BitmapScreenNail(list.remove(list.size() - 1));
mMipmaps = list.toArray(new Bitmap[list.size()]);
mConfig = Config.ARGB_8888;
}
@Override
public ScreenNail getScreenNail() {
return mScreenNail;
}
@Override
public int getImageHeight() {
return mImageHeight;
}
@Override
public int getImageWidth() {
return mImageWidth;
}
@Override
public int getLevelCount() {
return mMipmaps.length;
}
@Override
public Bitmap getTile(int level, int x, int y, int tileSize,
int borderSize, BitmapPool pool) {
x >>= level;
y >>= level;
int size = tileSize + 2 * borderSize;
Bitmap result = pool == null ? null : pool.getBitmap();
if (result == null) {
result = Bitmap.createBitmap(size, size, mConfig);
} else {
result.eraseColor(0);
}
Bitmap mipmap = mMipmaps[level];
Canvas canvas = new Canvas(result);
int offsetX = -x + borderSize;
int offsetY = -y + borderSize;
canvas.drawBitmap(mipmap, offsetX, offsetY, null);
return result;
}
public void recycle() {
if (mRecycled) return;
mRecycled = true;
for (Bitmap bitmap : mMipmaps) {
BitmapUtils.recycleSilently(bitmap);
}
if (mScreenNail != null) {
mScreenNail.recycle();
}
}
}
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