Yes, you don't have access to the dimensions of the uploaded image. Luckily, if you're just trying to create a thumbnail you don't need them -- the resize transformation preserves the aspect ratio automatically. You just need to pass in the maximum width and maximum height.
On Tue, Dec 15, 2009 at 11:28 PM, m seleron <[email protected]> wrote: > Hi, > > I tried a little. > I think that it is issue though I can try only with local. > > In oldImage of the return value of makeImageFromBlob, > oldImage#imageData is null. > > As a result, > I think that ImageImpl#updateDimensions is causing an exception. > It is called in getWidth etc. > > thanks. > > > On 12月16日, 午前9:53, Andreas Oesterer <[email protected]> wrote: > > I'm trying to scale an image after upload (in the doPost method). The > > blob key seems to be ok and the image is served ok after the upload. > > > > Image oldImage = ImagesServiceFactory.makeImageFromBlob(bk); > > double aspectRatio = (double) oldImage.getWidth() / (double) > > oldImage.getHeight(); > > > > -> > > > > java.lang.UnsupportedOperationException: No image data is available. > > -- > > 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 > [email protected]. > To unsubscribe from this group, send email to > [email protected]<google-appengine-java%[email protected]> > . > For more options, visit this group at > http://groups.google.com/group/google-appengine-java?hl=en. > > > -- 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 [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
