/*******************************************************************************
* This file is part of RedReader.
*
* RedReader is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* RedReader is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with RedReader. If not, see <http://www.gnu.org/licenses/>.
******************************************************************************/
package org.quantumbadger.redreader.views;
import android.annotation.SuppressLint;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Movie;
import android.graphics.Paint;
import android.os.SystemClock;
import android.view.View;
import org.quantumbadger.redreader.common.AndroidApi;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
public final class GIFView extends View {
private final Movie mMovie;
private long movieStart;
private final Paint paint = new Paint();
@SuppressLint("NewApi")
public GIFView(Context context, InputStream is) {
super(context);
if (AndroidApi.isHoneyCombOrLater()) {
setLayerType(View.LAYER_TYPE_SOFTWARE, null);
}
final byte[] data = streamToBytes(is); // workaround for strange Android bug
mMovie = Movie.decodeByteArray(data, 0, data.length);
if(mMovie.duration() < 1) {
throw new RuntimeException("Invalid GIF");
}
paint.setAntiAlias(true);
paint.setFilterBitmap(true);
//paint.setDither(true);
}
protected void onDraw(final Canvas canvas) {
canvas.drawColor(Color.TRANSPARENT);
super.onDraw(canvas);
long now = SystemClock.uptimeMillis();
final float scale = Math.min((float)getWidth() / mMovie.width(), (float)getHeight() / mMovie.height());
canvas.scale(scale, scale);
canvas.translate(((float)getWidth() / scale - (float)mMovie.width())/2f,
((float)getHeight() / scale - (float)mMovie.height())/2f);
if(movieStart == 0) movieStart = (int)now;
mMovie.setTime((int)((now - movieStart) % mMovie.duration()));
mMovie.draw(canvas, 0, 0, paint);
this.invalidate();
}
private static byte[] streamToBytes(final InputStream is) {
final ByteArrayOutputStream baos = new ByteArrayOutputStream(1024);
final byte[] buffer = new byte[1024];
int len;
try {
while ((len = is.read(buffer)) >= 0) {
baos.write(buffer, 0, len);
}
} catch (IOException e) {
throw new RuntimeException(e);
}
return baos.toByteArray();
}
}