/**
* Copyright 2010 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.html;
import com.google.gwt.dom.client.CanvasElement;
import com.google.gwt.dom.client.Document;
import forplay.core.Asserts;
import forplay.core.CanvasSurface;
import forplay.core.Surface;
import forplay.core.SurfaceLayer;
class HtmlSurfaceLayerDom extends HtmlLayerDom implements SurfaceLayer {
private Surface surface;
HtmlSurfaceLayerDom(int width, int height) {
super(Document.get().createCanvasElement());
canvas().setWidth(width);
canvas().setHeight(height);
surface = new CanvasSurface(new HtmlCanvas(canvas(), width, height));
}
@Override
public void destroy() {
super.destroy();
surface = null;
}
@Override
public Surface surface() {
return surface;
}
private CanvasElement canvas() {
return element().cast();
}
@Override
public float width() {
Asserts.checkNotNull(surface, "Surface must not be null");
return surface.width();
}
@Override
public float height() {
Asserts.checkNotNull(surface, "Surface must not be null");
return surface.height();
}
@Override
public float scaledWidth() {
return transform().scaleX() * width();
}
@Override
public float scaledHeight() {
return transform().scaleY() * height();
}
}