96 lines
3.3 KiB
Java
96 lines
3.3 KiB
Java
/*
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* Copyright (c) 2001, 2024, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 4516037
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* @summary verify that scaled Polygons honor the transform
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*/
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import java.awt.Color;
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import static java.awt.Color.*;
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import java.awt.Graphics2D;
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import java.awt.Polygon;
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import java.awt.image.BufferedImage;
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public class ScaledPolyTest {
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public static void main(String[] args) {
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Polygon poly = new Polygon();
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poly.addPoint(20, 10);
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poly.addPoint(30, 30);
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poly.addPoint(10, 30);
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poly.addPoint(20, 10);
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int height = 300;
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int width = 300;
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BufferedImage bi = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
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Graphics2D g2d = bi.createGraphics();
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g2d.setColor(Color.white);
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g2d.fillRect(0, 0, bi.getWidth(), bi.getHeight());
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g2d.translate(10, 10);
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g2d.scale(2, 2);
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g2d.setColor(Color.yellow);
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g2d.fill(poly);
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g2d.setColor(Color.blue);
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g2d.draw(poly);
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/*
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* Examine each row of the image.
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* If the stroked polygon is correctly aligned on the filled polygon,
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* if there is anything except white on the line,
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* the transition will always be white+->blue+->yellow*->blue*->white+
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*/
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int bluePix = blue.getRGB();
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int yellowPix = yellow.getRGB();
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int whitePix = white.getRGB();
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for (int y = 0; y < height; y++ ) {
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int x = 0;
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int pix = whitePix;
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while (pix == whitePix && x < width) pix = bi.getRGB(x++, y);
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if (pix == whitePix && x == width) continue; // all white row.
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if (pix != bluePix) throw new RuntimeException("Expected blue");
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while (pix == bluePix) pix = bi.getRGB(x++, y);
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if (pix == yellowPix) {
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while (pix == yellowPix) pix = bi.getRGB(x++, y);
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if (pix != bluePix) throw new RuntimeException("Expected blue");
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while (pix == bluePix) pix = bi.getRGB(x++, y);
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if (pix != whitePix) throw new RuntimeException("Expected white");
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}
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while (pix == whitePix && x < width) pix = bi.getRGB(x++, y);
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if (pix == whitePix && x == width) {
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continue;
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} else {
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throw new RuntimeException("Expected white to finish the row");
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}
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}
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}
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}
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