http://www.jexp.ru/index.php?action=history&feed=atom&title=Java_Tutorial%2F2D_Graphics%2FJPEG
Java Tutorial/2D Graphics/JPEG - История изменений
2026-04-19T00:28:15Z
История изменений этой страницы в вики
MediaWiki 1.30.0
http://www.jexp.ru/index.php?title=Java_Tutorial/2D_Graphics/JPEG&diff=3458&oldid=prev
в 17:44, 31 мая 2010
2010-05-31T17:44:26Z
<p></p>
<table class="diff diff-contentalign-left" data-mw="interface">
<tr style="vertical-align: top;" lang="ru">
<td colspan="1" style="background-color: white; color:black; text-align: center;">← Предыдущая</td>
<td colspan="1" style="background-color: white; color:black; text-align: center;">Версия 17:44, 31 мая 2010</td>
</tr><tr><td colspan="2" style="text-align: center;" lang="ru"><div class="mw-diff-empty">(нет различий)</div>
</td></tr></table>
http://www.jexp.ru/index.php?title=Java_Tutorial/2D_Graphics/JPEG&diff=3459&oldid=prev
Admin: 1 версия
2010-05-31T15:24:42Z
<p>1 версия</p>
<p><b>Новая страница</b></p><div>== Encoding an image to a JPEG file ==<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="java"><br />
import java.awt.Color;<br />
import java.awt.Font;<br />
import java.awt.Graphics;<br />
import java.awt.image.BufferedImage;<br />
import java.awt.image.PixelGrabber;<br />
import java.io.FileOutputStream;<br />
import com.sun.image.codec.jpeg.JPEGCodec;<br />
import com.sun.image.codec.jpeg.JPEGEncodeParam;<br />
import com.sun.image.codec.jpeg.JPEGImageEncoder;<br />
public class Main {<br />
public static void main(String[] args) throws Exception {<br />
BufferedImage img = new BufferedImage(100, 100, BufferedImage.TYPE_INT_RGB);<br />
Graphics g = img.getGraphics();<br />
g.setColor(Color.red);<br />
g.setFont(new Font("Arial", Font.BOLD, 14));<br />
g.drawString("Reference", 10, 80);<br />
int w = 100;<br />
int h = 100;<br />
int x = 1;<br />
int y = 1;<br />
<br />
int[] pixels = new int[w * h];<br />
PixelGrabber pg = new PixelGrabber(img, x, y, w, h, pixels, 0, w);<br />
pg.grabPixels();<br />
BufferedImage bimg = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);<br />
for (int j = 0; j < h; j++) {<br />
for (int i = 0; i < w; i++) {<br />
bimg.setRGB(x + i, y + j, pixels[j * w + i]);<br />
}<br />
}<br />
FileOutputStream fout = new FileOutputStream("jpg.jpg");<br />
JPEGImageEncoder jencoder = JPEGCodec.createJPEGEncoder(fout);<br />
JPEGEncodeParam enParam = jencoder.getDefaultJPEGEncodeParam(bimg);<br />
enParam.setQuality(1.0F, true);<br />
jencoder.setJPEGEncodeParam(enParam);<br />
jencoder.encode(bimg);<br />
fout.close();<br />
}<br />
}</source><br />
<br />
<br />
<!-- end source code --><br />
<br />
<br />
<br />
<br />
<br />
== Rescale JPG ==<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="java"><br />
import java.awt.Graphics2D;<br />
import java.awt.geom.AffineTransform;<br />
import java.awt.image.BufferedImage;<br />
import java.io.File;<br />
import javax.imageio.ImageIO;<br />
public class Main {<br />
public static void main(String[] args) throws Exception {<br />
BufferedImage bsrc = ImageIO.read(new File("a.jpg"));<br />
BufferedImage bdest = new BufferedImage(100, 100, BufferedImage.TYPE_INT_RGB);<br />
Graphics2D g = bdest.createGraphics();<br />
AffineTransform at = AffineTransform.getScaleInstance(2, 2);<br />
g.drawRenderedImage(bsrc, at);<br />
ImageIO.write(bdest, "JPG", new File("b.jpg"));<br />
}<br />
}</source><br />
<br />
<br />
<!-- end source code --></div>
Admin