/*
* Copyright ( c ) 2005 , 2017 , 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 .
*
* 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
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* questions .
*/
/*
* @ test
* @ bug 6286578
* @ summary Test verifies that RGB images does not convert to gray - scaled if
* default image metadata is used
*/
import java.awt.Color;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import javax.imageio.IIOImage;
import javax.imageio.ImageIO;
import javax.imageio.ImageReader;
import javax.imageio.ImageTypeSpecifier;
import javax.imageio.ImageWriteParam;
import javax.imageio.ImageWriter;
import javax.imageio.metadata.IIOMetadata;
import javax.imageio.stream.ImageInputStream;
import javax.imageio.stream.ImageOutputStream;
public class RGBImageTest {
Color[] usedColors = {
Color.red, Color.green, Color.blue, Color.yellow,
Color.cyan, Color.magenta, Color.white, Color.black };
BufferedImage src = null ;
int dx= 20 ;
int height = 100 ;
protected BufferedImage getSrc() {
if (src == null ) {
src = new BufferedImage(dx * usedColors.length, height,
BufferedImage.TYPE_INT_RGB);
Graphics g = src.createGraphics();
for (int i = 0 ; i < usedColors.length; i++) {
g.setColor(usedColors[i]);
g.fillRect(dx * i, 0 , dx, height);
}
}
return src;
}
protected void doTest() throws IOException {
BufferedImage biSrc = getSrc();
ImageWriter writer = ImageIO.getImageWritersByFormatName("GIF" ).next();
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ImageOutputStream ios = ImageIO.createImageOutputStream(baos);
writer.setOutput(ios);
ImageWriteParam writeParam = writer.getDefaultWriteParam();
IIOMetadata imageMetadata =
writer.getDefaultImageMetadata(new ImageTypeSpecifier(biSrc), writeParam);
IIOMetadata streamMetadata = writer.getDefaultStreamMetadata(writeParam);
IIOImage iioImg = new IIOImage(biSrc, null , imageMetadata);
writer.write(streamMetadata, iioImg, writeParam);
ios.close();
ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());
ImageInputStream iis = ImageIO.createImageInputStream(bais);
ImageReader reader = ImageIO.getImageReader(writer);
reader.setInput(iis);
BufferedImage dst = reader.read(0 );
// do test
int x = dx / 2 ;
int y = height / 2 ;
for (int i = 0 ; i < usedColors.length; i++) {
int dstRgb = dst.getRGB(x, y);
System.out.println("dstColor: " + Integer.toHexString(dstRgb));
int srcRgb = usedColors[i].getRGB();
System.out.println("srcColor: " + Integer.toHexString(srcRgb));
if (dstRgb != srcRgb) {
throw new RuntimeException("wrong color " + i + ": " + Integer.toHexString(dstRgb));
}
x += dx;
}
}
public static void main(String[] args) throws IOException {
RGBImageTest t = new RGBImageTest();
t.doTest();
}
}
Messung V0.5 in Prozent C=94 H=97 G=95
¤ Dauer der Verarbeitung: 0.9 Sekunden
(vorverarbeitet am 2026-06-10)
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