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The PlayN HTML (GWT) backend

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/**
 * Copyright 2010 The PlayN 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 playn.html;

import com.google.gwt.canvas.dom.client.Context2d;
import com.google.gwt.dom.client.CanvasElement;
import com.google.gwt.dom.client.Document;

import pythagoras.f.MathUtil;

import playn.core.gl.Scale;

class HtmlCanvas extends AbstractHtmlCanvas {

  private final CanvasElement canvas;

  public static HtmlCanvas create(Scale scale, float width, float height) {
    float sw = scale.scaledCeil(width), sh = scale.scaledCeil(height);
    HtmlCanvas canvas = new HtmlCanvas(sw, sh);
    canvas.scale(scale.factor, scale.factor);
    return canvas;
  }

  HtmlCanvas(Context2d ctx, float width, float height) {
    this(ctx, null, width, height);
  }

  CanvasElement canvas() {
    return canvas;
  }

  private HtmlCanvas(float width, float height) {
    this(Document.get().createCanvasElement(), width, height);
  }

  private HtmlCanvas(CanvasElement canvas, float width, float height) {
    this(canvas.getContext2d(), canvas, width, height);
    canvas.setWidth(MathUtil.iceil(width));
    canvas.setHeight(MathUtil.iceil(height));
  }

  private HtmlCanvas(Context2d ctx, CanvasElement canvas, float width, float height) {
    super(ctx, width, height);
    this.canvas = canvas;
  }
}