Chris Nokleberg <[EMAIL PROTECTED]> wrote on Thu, 11 Jul 2002 13:39:22 -0700:
>I have a Java 1.1-compatible LGPL PNG decoder that I'd be willing to >adapt as necessary, if it hasn't been done yet. See > http://sixlegs.com/software/png/ Thank you, Chris, for offering your help! What do people think about supporting the Java Image I/O API (javax.imageio.*, [1]) in Classpath (or Classpath Extensions)? Advantages, IMHO: - javax.imageio is a clean framework for supporting various image formats. Supporting PNG via javax.imageio would be cleaner than adding it directly into Classpath - Sun made javax.imageio part of the Java Standard Edition 1.4, so we'll have to support Image I/O anyway, sooner or later - people like Chris could contribute en-/decoders that work on any JVM, regardless of whether the JVM is based on Classpath or not Disadvantages: - we have no implementation of javax.imageio at the current time If people agree that javax.imageio is the way to go, we could ask Chris to package the PNG ImageReader as a plug-in according to Sun's "Service Provider Interface" (see [2] - [4], and the javax.imageio.spi JavaDoc). Ideally, Chris could make sure that his/her plug-in gives exactly the same results as the PNG implementation in the current JDK. For image metadata, one could e.g. write a test suite that extracts the metadata for each image in the PNG test suite. The results then should be identical with the GNU and the Sun implementations. What's your opinion? -- Sascha [1] http://java.sun.com/j2se/1.4/docs/guide/imageio/ [2] http://java.sun.com/j2se/1.4/docs/guide/imageio/spec/extending.fm1.html [3] http://java.sun.com/j2se/1.4/docs/api/javax/imageio/metadata/doc- files/standard_metadata.html [4] http://java.sun.com/j2se/1.4/docs/api/javax/imageio/metadata/doc- files/png_metadata.html _______________________________________________ Classpath mailing list [EMAIL PROTECTED] http://mail.gnu.org/mailman/listinfo/classpath
