90 lines
3.0 KiB
Java
90 lines
3.0 KiB
Java
/*
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* Copyright (c) 2015, 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 8080287 8136354
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* @run main RescaleAlphaTest
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* @summary RescaleOp with scaleFactor/alpha should copy alpha to destination
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* channel
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*/
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import java.awt.Graphics2D;
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import java.awt.image.BufferedImage;
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import java.awt.image.RescaleOp;
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import java.awt.Color;
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import java.awt.Frame;
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import java.io.IOException;
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public class RescaleAlphaTest {
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BufferedImage bimg = null, bimg1;
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int w = 10, h = 10;
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float scaleFactor = 0.5f;
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float offset = 0.0f;
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public static void main(String[] args) throws Exception {
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RescaleAlphaTest test = new RescaleAlphaTest();
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test.startTest();
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}
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private void startTest() throws Exception {
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// Test with source image with alpha channel
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bimg = new BufferedImage(w, h, BufferedImage.TYPE_INT_ARGB);
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Graphics2D g2d = bimg.createGraphics();
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g2d.setColor(Color.GREEN);
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g2d.fillRect(0, 0, w, h);
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RescaleOp res = new RescaleOp(scaleFactor, offset, null);
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bimg1 = res.filter(bimg, null);
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// check if destination image has alpha channel copied from src
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checkForAlpha(bimg1);
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// Test with source image without alpha channel
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bimg = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
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g2d = bimg.createGraphics();
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g2d.setColor(Color.GREEN);
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g2d.fillRect(0, 0, w, h);
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res = new RescaleOp(scaleFactor, offset, null);
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// Create destination image with alpha channel
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bimg1 = new BufferedImage(w, h, BufferedImage.TYPE_INT_ARGB);
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bimg1 = res.filter(bimg, bimg1);
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// check if filtered destination image has alpha channel
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checkForAlpha(bimg1);
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}
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private void checkForAlpha(BufferedImage bi) throws IOException {
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int argb = bi.getRGB(w/2, h/2);
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if ((argb >>> 24) != 255) {
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throw new
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RuntimeException("Wrong alpha in destination image.RescaleOp with alpha failed.");
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}
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}
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}
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