PNG images processing framework
Framework was developed to provide easy to use extensible tools
to operate with graphics represented as PNG files. There is
provided variety of tools to optimize graphical data, which
significantly reduce total size of graphical data without
quality loss and allows you to put even more graphics into
your J2ME applications than was possible before due to the
limitations on JAR size. Futhermore framework provides a lot of
facilities to operate with PNG data directly, for example:
you can easily extract and modify any part of PNG image,
you can merge palettes from several PNG images, you can change
Hue/Saturation/Brightness of PNG images, etc.
Framework provides definition of custom data format for
image data and includes custom image format encoders and
decoders, including decoder compatible with J2ME MIDP 1.0.
Using of custom image data format allows melting of several
similar (by palette) images into one file, where palette and
actual PNG image data separated. That allows you to put several
animation frames into one file and than acquire that frames as
array of images, which eliminates need to use clips in you
drawing process (this will speed up performance of your J2ME
applications). Moreover, because all images use one single
palette this will lead to significant reduce of total size of
graphical data and allows you to change images palette during
runtime while images decoding stage occurs. Thus you will be
able to acquire sprites with different colors without increasing
total size of your image data in JAR file - furthermore total
size of image data will be less than usually when you simply
store animation frames as one image and for different color
store different sequences of frames.
Main features:
-
Custom image data format, which lead to decreasing of total
size of image data and allows to change images palette during
runtime while images decoding stage occurs. Thus you will be
able to acquire sprites with different colors without increasing
total size of your gfx data in JAR file.
-
MIDP 1.0 compatible decoder for custom image format, which
decodes image data and returns array of images. This allows
to draw images directly without clip operation (this will
speed up performance of your J2ME applications) and in the
same time total size of gfx data in JAR file will be the
same or even less than if it will be represented as one image
with several sequences of frames.
-
Melting tool to melt several PNG files and store it as one file
using custom data format (see above).
-
Merging tool which allows you to merge palettes of several PNG
images and modify palette info in each PNG file processed.
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Cleaning tool to remove all ancillary information from PNG files.
This will lead to up to two times size reduction, especially
when processed small images.
-
Tool to operate with image color in HSB (Hue, Saturation and
Brightness) color space, which can be used to acquire sprites
with different colors, but with the same palette data, which
allows runtime color manipulations directly from MIDLets.
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Fully integrated with Ant
build tool's environment allowing you to fully automate building process.
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Provides very flexible and extensible API that allows you to easy
customize framework for particular needs.
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