gdx-studio

/*******************************************************************************

 * Copyright 2011 See AUTHORS file.

 * 

 * 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.badlogic.gdx.tools.hiero.unicodefont.effects;

import java.awt.Color;

import java.awt.GradientPaint;

import java.awt.Graphics2D;

import java.awt.image.BufferedImage;

import java.util.ArrayList;

import java.util.Iterator;

import java.util.List;

import com.badlogic.gdx.tools.hiero.unicodefont.Glyph;

import com.badlogic.gdx.tools.hiero.unicodefont.UnicodeFont;

/** Paints glyphs with a gradient fill.

 * @author Nathan Sweet */

public class GradientEffect implements ConfigurableEffect {

	private Color topColor = Color.cyan, bottomColor = Color.blue;

	private int offset = 0;

	private float scale = 1;

	private boolean cyclic;

	public GradientEffect () {

	}

	public GradientEffect (Color topColor, Color bottomColor, float scale) {

		this.topColor = topColor;

		this.bottomColor = bottomColor;

		this.scale = scale;

	}

	public void draw (BufferedImage image, Graphics2D g, UnicodeFont unicodeFont, Glyph glyph) {

		int ascent = unicodeFont.getAscent();

		float height = (ascent) * scale;

		float top = -glyph.getYOffset() + unicodeFont.getDescent() + offset + ascent / 2 - height / 2;

		g.setPaint(new GradientPaint(0, top, topColor, 0, top + height, bottomColor, cyclic));

		g.fill(glyph.getShape());

	}

	public Color getTopColor () {

		return topColor;

	}

	public void setTopColor (Color topColor) {

		this.topColor = topColor;

	}

	public Color getBottomColor () {

		return bottomColor;

	}

	public void setBottomColor (Color bottomColor) {

		this.bottomColor = bottomColor;

	}

	public int getOffset () {

		return offset;

	}

	/** Sets the pixel offset to move the gradient up or down. The gradient is normally centered on the glyph. */

	public void setOffset (int offset) {

		this.offset = offset;

	}

	public float getScale () {

		return scale;

	}

	/** Changes the height of the gradient by a percentage. The gradient is normally the height of most glyphs in the font. */

	public void setScale (float scale) {

		this.scale = scale;

	}

	public boolean isCyclic () {

		return cyclic;

	}

	/** If set to true, the gradient will repeat. */

	public void setCyclic (boolean cyclic) {

		this.cyclic = cyclic;

	}

	public String toString () {

		return "Gradient";

	}

	public List getValues () {

		List values = new ArrayList();

		values.add(EffectUtil.colorValue("Top color", topColor));

		values.add(EffectUtil.colorValue("Bottom color", bottomColor));

		values.add(EffectUtil.intValue("Offset", offset,

			"This setting allows you to move the gradient up or down. The gradient is normally centered on the glyph."));

		values.add(EffectUtil.floatValue("Scale", scale, 0, 10, "This setting allows you to change the height of the gradient by a"

			+ "percentage. The gradient is normally the height of most glyphs in the font."));

		values.add(EffectUtil.booleanValue("Cyclic", cyclic, "If this setting is checked, the gradient will repeat."));

		return values;

	}

	public void setValues (List values) {

		for (Iterator iter = values.iterator(); iter.hasNext();) {

			Value value = (Value)iter.next();

			if (value.getName().equals("Top color")) {

				topColor = (Color)value.getObject();

			} else if (value.getName().equals("Bottom color")) {

				bottomColor = (Color)value.getObject();

			} else if (value.getName().equals("Offset")) {

				offset = ((Integer)value.getObject()).intValue();

			} else if (value.getName().equals("Scale")) {

				scale = ((Float)value.getObject()).floatValue();

			} else if (value.getName().equals("Cyclic")) {

				cyclic = ((Boolean)value.getObject()).booleanValue();

			}

		}

	}

}