[jbossseam-issues] [JBoss JIRA] Created: (JBSEAM-2616) <s:transformImageSize> fills transparent areas with white background

[Manfred Gleirscher (JIRA)]

<s:transformImageSize> fills transparent areas with white background
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                 Key: JBSEAM-2616
                 URL: http://jira.jboss.com/jira/browse/JBSEAM-2616
             Project: JBoss Seam
          Issue Type: Bug
          Components: JSF Controls
    Affects Versions: 2.0.0.GA
         Environment: Windows, Jboss 4.2.1, Facelets
            Reporter: Manfred Gleirscher
            Priority: Minor


if a png-image containing transparent areas is scaled, the transparent areas get filled with white color.

I created my own transformImageSize-component which works properly. 
Its applyTransformation method looks like that:

<code>
  public void applyTransform(Image image) throws IOException {

    ...........

    BufferedImage in = image.getBufferedImage();

    GraphicsConfiguration gc = in.createGraphics().getDeviceConfiguration();
    BufferedImage out = gc.createCompatibleImage(scaledWidth, scaledHeight,
        Transparency.BITMASK);
    Graphics2D g2d = out.createGraphics();
    g2d.setComposite(AlphaComposite.Src);
    g2d.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
        RenderingHints.VALUE_INTERPOLATION_BICUBIC);
    g2d.drawImage(in, 0, 0, scaledWidth, scaledHeight, null);
    g2d.dispose();

    image.setBufferedImage(out);
  }
</code>

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