As reported by @reger24, image and favicon viewing was broken with
unauthenticated requests on peers configured to require authentication
even from localhost.
So I unified viewing rights check in a single new function on
ImageViewer class.
Main image processing is now in ImageViewer, used by both ViewImage and
ViewFavicon.
Fixed URIMetadataNode.getFavicon to use non-standard icons with no size
ass fallback.
jdk-based logger tend to block
at java.util.logging.Logger.log(Logger.java:476) in concurrent
environments. This makes logging a main performance issue. To overcome
this problem, this is a add-on to jdk logging to put log entries on a
concurrent message queue and log the messages one by one using a
separate process.
- FTPClient uses the concurrent logging instead of the log4j logger
caused by a JRE bug, the PixelGrabber had to be circumvented using an
own frame buffer which can be read without a PixelGrabber. This resulted
in ultra-fast and much less memory-consuming transformation. YaCy images
are now generated really fast!
- replaced the dot in the NetworkGraph with arrows
- enhanced the image drawing speed using pre-computed color values
- added more attention for OOM cases during very large image painting
main time-consuming process. This shall be done in concurrency.
- added concurrent processes to call the PixelGrabber and framework to
do that (queues)
It is now possible to create 4k-Images (3840x2160) i.e. with the Network
Graphics servlet
compressed deflater output, then assign an exact-sized byte[] which
makes resizing afterwards superfluous
- after all enhancements all class objects were removed; result is just
one short static method
- made objects final where possible
quite a bit to remove all code that handles transparency. With this
highly specialized png writer it is possible to write png images much
faster that with the JRE built-in png writer.
In a second step it can be possible to add concurrency to increase
computation speed further.
Michael Peter Christen