/*

 * Copyright 2008 Sun Microsystems, Inc.  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.

 *

 * 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

 * have any questions.

 */

/**

 * @test

 * @bug 6679308

 * @summary test drawing to Alpha surfaces

 */

import java.awt.*;

import java.awt.image.*;

public class AlphaSurfaceText {

    int wid=400, hgt=200;

    public AlphaSurfaceText(int biType, Color c) {

        BufferedImage opaquebi0 =

           new BufferedImage(wid, hgt, BufferedImage.TYPE_INT_RGB);

        drawText(opaquebi0, c);

        BufferedImage alphabi = new BufferedImage(wid, hgt, biType);

        drawText(alphabi, c);

        BufferedImage opaquebi1 =

           new BufferedImage(wid, hgt, BufferedImage.TYPE_INT_RGB);

        Graphics2D g2d = opaquebi1.createGraphics();

        g2d.drawImage(alphabi, 0, 0, null);

        compare(opaquebi0, opaquebi1, biType, c);

    }

    private void drawText(BufferedImage bi, Color c) {

        Graphics2D g = bi.createGraphics();

        g.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING,

                           RenderingHints.VALUE_TEXT_ANTIALIAS_ON);

        g.setColor(c);

        g.setFont(new Font("sansserif", Font.PLAIN, 70));

        g.drawString("Hello!", 20, 100);

        g.setFont(new Font("sansserif", Font.PLAIN, 12));

        g.drawString("Hello!", 20, 130);

        g.setFont(new Font("sansserif", Font.PLAIN, 10));

        g.drawString("Hello!", 20, 150);

    }

    // Need to allow for minimal rounding error, so allow each component

    // to differ by 1.

    void compare(BufferedImage bi0, BufferedImage bi1, int biType, Color c) {

        for (int x=0; x<wid; x++) {

            for (int y=0; y<hgt; y++) {

                int rgb0 = bi0.getRGB(x, y);

                int rgb1 = bi1.getRGB(x, y);

                if (rgb0 == rgb1) continue;

                int r0 = (rgb0 & 0xff0000) >> 16;

                int r1 = (rgb1 & 0xff0000) >> 16;

                int rdiff = r0-r1; if (rdiff<0) rdiff = -rdiff;

                int g0 = (rgb0 & 0x00ff00) >> 8;

                int g1 = (rgb1 & 0x00ff00) >> 8;

                int gdiff = g0-g1; if (gdiff<0) gdiff = -gdiff;

                int b0 = (rgb0 & 0x0000ff);

                int b1 = (rgb1 & 0x0000ff);

                int bdiff = b0-b1; if (bdiff<0) bdiff = -bdiff;

                if (rdiff > 1 || gdiff > 1 || bdiff > 1) {

                    throw new RuntimeException(

                      "Images differ for type "+biType + " col="+c +

                      " at x=" + x + " y="+ y + " " +

                      Integer.toHexString(rgb0) + " vs " +

                      Integer.toHexString(rgb1));

                }

            }

        }

    }

    public static void main(String[] args) {

        new AlphaSurfaceText(BufferedImage.TYPE_INT_ARGB, Color.white);

        new AlphaSurfaceText(BufferedImage.TYPE_INT_ARGB, Color.red);

        new AlphaSurfaceText(BufferedImage.TYPE_INT_ARGB, Color.blue);

        new AlphaSurfaceText(BufferedImage.TYPE_INT_ARGB_PRE, Color.white);

        new AlphaSurfaceText(BufferedImage.TYPE_INT_ARGB_PRE, Color.red);

        new AlphaSurfaceText(BufferedImage.TYPE_INT_ARGB_PRE, Color.blue);

        new AlphaSurfaceText(BufferedImage.TYPE_4BYTE_ABGR, Color.white);

        new AlphaSurfaceText(BufferedImage.TYPE_4BYTE_ABGR, Color.red);

        new AlphaSurfaceText(BufferedImage.TYPE_4BYTE_ABGR, Color.blue);

        new AlphaSurfaceText(BufferedImage.TYPE_4BYTE_ABGR_PRE, Color.white);

        new AlphaSurfaceText(BufferedImage.TYPE_4BYTE_ABGR_PRE, Color.red);

        new AlphaSurfaceText(BufferedImage.TYPE_4BYTE_ABGR_PRE, Color.blue);

   }

}