/*

 * Copyright (c) 2000, 2003, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

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 */

package sun.java2d.pipe;

import java.awt.Rectangle;

import java.awt.Shape;

import java.awt.Font;

import java.awt.font.GlyphVector;

import sun.java2d.SunGraphics2D;

import sun.java2d.loops.FontInfo;

import sun.font.GlyphList;

/*

 * This class uses the alpha graybits arrays from a GlyphList object to

 * drive a CompositePipe in much the same way as the antialiasing renderer.

 */

public class TextRenderer extends GlyphListPipe {

    CompositePipe outpipe;

    public TextRenderer(CompositePipe pipe) {

        outpipe = pipe;

    }

    protected void drawGlyphList(SunGraphics2D sg2d, GlyphList gl) {

        int num = gl.getNumGlyphs();

        Region clipRegion = sg2d.getCompClip();

        int cx1 = clipRegion.getLoX();

        int cy1 = clipRegion.getLoY();

        int cx2 = clipRegion.getHiX();

        int cy2 = clipRegion.getHiY();

        Object ctx = null;

        try {

            int[] bounds = gl.getBounds();

            Rectangle r = new Rectangle(bounds[0], bounds[1],

                                        bounds[2] - bounds[0],

                                        bounds[3] - bounds[1]);

            Shape s = sg2d.untransformShape(r);

            ctx = outpipe.startSequence(sg2d, s, r, bounds);

            for (int i = 0; i < num; i++) {

                gl.setGlyphIndex(i);

                int metrics[] = gl.getMetrics();

                int gx1 = metrics[0];

                int gy1 = metrics[1];

                int w = metrics[2];

                int gx2 = gx1 + w;

                int gy2 = gy1 + metrics[3];

                int off = 0;

                if (gx1 < cx1) {

                    off = cx1 - gx1;

                    gx1 = cx1;

                }

                if (gy1 < cy1) {

                    off += (cy1 - gy1) * w;

                    gy1 = cy1;

                }

                if (gx2 > cx2) gx2 = cx2;

                if (gy2 > cy2) gy2 = cy2;

                if (gx2 > gx1 && gy2 > gy1 &&

                    outpipe.needTile(ctx, gx1, gy1, gx2 - gx1, gy2 - gy1))

                {

                    byte alpha[] = gl.getGrayBits();

                    outpipe.renderPathTile(ctx, alpha, off, w,

                                           gx1, gy1, gx2 - gx1, gy2 - gy1);

                } else {

                    outpipe.skipTile(ctx, gx1, gy1);

                }

            }

        } finally {

            if (ctx != null) {

                outpipe.endSequence(ctx);

            }

        }

    }

}