/**
* Copyright 2011 The ForPlay Authors
*
* 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 forplay.android;
import forplay.core.Asserts;
import static forplay.core.ForPlay.graphics;
import forplay.core.Canvas;
import forplay.core.CanvasImage;
import forplay.core.CanvasLayer;
class AndroidCanvasLayer extends AndroidLayer implements CanvasLayer {
private CanvasImage canvas;
AndroidCanvasLayer(int width, int height, boolean alpha) {
canvas = ((AndroidGraphics)graphics()).createImage(width, height, alpha);
}
@Override
public Canvas canvas() {
return canvas.canvas();
}
@Override
public void destroy() {
super.destroy();
canvas = null;
}
@Override
void paint(AndroidCanvas surf) {
if (!visible()) return;
surf.save();
transform(surf);
surf.setAlpha(surf.alpha() * alpha);
surf.drawImage(canvas, 0, 0);
surf.restore();
}
@Override
public float width() {
Asserts.checkNotNull(canvas, "Canvas must not be null");
return canvas.width();
}
@Override
public float height() {
Asserts.checkNotNull(canvas, "Canvas must not be null");
return canvas.height();
}
@Override
public float scaledWidth() {
return transform().scaleX() * width();
}
@Override
public float scaledHeight() {
return transform().scaleY() * height();
}
}