I am evaluating imagesService.applyTransform() to transform images(from URL) to specific width/height. It's documented that PNG is supported. But it seems it doesn't understand some PNG file. for example : http://destinyfab.appspot.com/resizer/resize?url=http://www.google.com.tw/intl/en_com/images/srpr/logo1w.png&w=500&h=500 It works well , and can transform google's logo to 500x500.
BUT , this PNG : http://destinyfab.appspot.com/resizer/resize?url=http://upload.wikimedia.org/wikipedia/commons/a/ac/Fairytale_firefox.png&w=500&h=500 An error occurred , with this stacktrace : Caused by: java.lang.IllegalArgumentException: Unknown at com.google.appengine.api.images.ImagesServiceImpl.convertApplicationException(ImagesServiceImpl.java:306) at com.google.appengine.api.images.ImagesServiceImpl.applyTransform(ImagesServiceImpl.java:73) at com.google.appengine.api.images.ImagesServiceImpl.applyTransform(ImagesServiceImpl.java:50) at com.google.appengine.api.images.ImagesServiceImpl.applyTransform(ImagesServiceImpl.java:39) at controllers.Resizer.resize(Resizer.java:72) I tried some PNGs , and many transparent PNG cannot be transformed . Is this GAE's limitation ? The code is very simple , just grab the url's content , transform to byte[]. byte[] imageBytes = baos.toByteArray(); Logger.info("imageBytes.length = %s " , imageBytes.length); ImagesService imagesService = ImagesServiceFactory.getImagesService(); Image oldImage = ImagesServiceFactory.makeImage(imageBytes); Transform transform = ImagesServiceFactory.makeResize(w, h); Image newImage = imagesService.applyTransform(transform, oldImage); //error occurs byte[] newImageData = newImage.getImageData(); -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To post to this group, send email to google-appengine-java@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
