[jbossseam-issues] [JBoss JIRA] Assigned: (JBSEAM-1788) s:graphicImage fails to transform GIF images

s:graphicImage fails to transform GIF images -------------------------------------------- Key: JBSEAM-1788 URL: http://jira.jboss.com/jira/browse/JBSEAM-1788 Project: JBoss Seam Issue Type: Bug Components: Core Affects Versions: 2.0.0.BETA1 Environment: windows xp, JDK 1.6.0 Reporter: henrik lindberg Assigned To: Pete Muir The org.jboss.seam.ui.graphicImage.Image class fails to rescale GIF images. This is caused by the use of BICUBIC INTERPOLATION not working for GIF images. I see three solutions (tested in similar code in one of my servlets that suffered from the same problem): - Use this rendering hint (in use now) g2d.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BICUBIC); but then change the format name to "png" when writing with image IO - Use this rendering hint g2d.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_NEAREST_NEIGHBOR); and render as "gif" - Use NEAREST_NEIGHBOR if image is written as a GIF, and BICUBIC otherwise. The combination INTERPOLATION_BICUBIC (as well as INTERPOLATION_LINEAR) simply does not work if the image is written with ImageIO in "gif" format. The result is all white pixels.