compositeglyph.java

来自「纯java操作系统jnode,安装简单和操作简单的个人使用的Java操作系统」· Java 代码 · 共 83 行

/*
 * $Id: CompositeGlyph.java,v 1.1 2003/11/25 11:51:38 epr Exp $
 */
package org.jnode.awt.font.truetype;

import java.awt.geom.AffineTransform;
import java.awt.geom.GeneralPath;
import java.io.IOException;


public class CompositeGlyph extends Glyph {

	private static final int ARGS_WORDS = 0;
	private static final int ARGS_XY = 1;
	private static final int SCALE = 3;
	private static final int XY_SCALE = 6;
	private static final int TWO_BY_TWO = 7;
	private static final int MORE_COMPONENTS = 5;

	private GeneralPath shape;
	private int noComponents;
	private final TTFGlyphTable table;

	public CompositeGlyph(TTFGlyphTable table) {
		this.table = table;
	}

	public String getType() {
		return "Composite Glyph";
	}

	public GeneralPath getShape() {
		return shape;
	}

	public void read(TTFInput ttf) throws IOException {
		super.read(ttf);
		shape = new GeneralPath();

		noComponents = 0;
		boolean more = true;
		while (more) {
			noComponents++;
			ttf.readUShortFlags();
			more = ttf.flagBit(MORE_COMPONENTS);
			int glyphIndex = ttf.readUShort();
			int arg1, arg2;
			if (ttf.flagBit(ARGS_WORDS)) {
				arg1 = ttf.readShort();
				arg2 = ttf.readShort();
			} else {
				arg1 = ttf.readChar();
				arg2 = ttf.readChar();
			}
			AffineTransform t = new AffineTransform();
			if (ttf.flagBit(ARGS_XY)) {
				t.translate(arg1, arg2);
			} else {
				System.err.println("TTFGlyfTable: ARGS_ARE_POINTS not implemented.");
			}

			if (ttf.flagBit(SCALE)) {
				double scale = ttf.readF2Dot14();
				t.scale(scale, scale);
			} else if (ttf.flagBit(XY_SCALE)) {
				double scaleX = ttf.readF2Dot14();
				double scaleY = ttf.readF2Dot14();
				t.scale(scaleX, scaleY);
			} else if (ttf.flagBit(TWO_BY_TWO)) {
				System.err.println("TTFGlyfTable: WE_HAVE_A_TWO_BY_TWO not implemented.");
			}

			GeneralPath appendGlyph = (GeneralPath) table.getGlyph(glyphIndex).getShape().clone();
			appendGlyph.transform(t);
			shape.append(appendGlyph, false);
		}
	}

	public String toString() {
		return super.toString() + ", " + noComponents + " components";
	}

}