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 Readme for:  Development » Library » jpeg2000_amiga.lha


Description: Library Plugin For Hollywood Applications
Download: jpeg2000_amiga.lha       (TIPS: Use the right click menu if your browser takes you back here all the time)
Size: 379kb
Version: 1.2
Date: 22 May 23
Author: Andreas Falkenhahn
Submitter: Amiwell
Email: abbate_salvatore/yahoo com
Requirements: Aros Abiv0 i386
Category: development/library
Replaces: development/library/jpeg2000_amiga.lha
License: Freeware
Distribute: yes
FileID: 2700
Comments: 0
Snapshots: 0
Videos: 0
Downloads: 16  (Current version)
46  (Accumulated)
Votes: 0 (0/0)  (30 days/7 days)

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This plugin allows Hollywood to load and save images in the JP2 and J2K image
formats. On top of that, when jpeg2000.hwp is installed, Hollywood will also be
able to compile 512x512 sized icons into macOS application bundles since these
icons need to be in the JPEG2000 format.

Usage is simple: Once this plugin has been installed, Hollywood will be able to
load *.jp2 and *.j2k images on the fly.

If you want to save images in the *.jp2 format, use the constant #IMGFMT_JP2
this plugin makes available once loaded. For example:

    SaveBrush(1, "test.jp2", 0, #IMGFMT_JP2, {Quality = 100})

If you want to save images in the *.j2k format, use the constant #IMGFMT_J2K
this plugin makes available once loaded.

For example:

    SaveBrush(1, "test.j2k", 0, #IMGFMT_J2K, {Quality = 100})

Note that JPEG2000 differs from the original JPEG in lots of ways. Two important
differences are:

* JPEG2000 supports lossless compression: To use lossless compression, pass 100
  in the "Quality" tag.

* JPEG2000 supports alpha channel graphics: If you save a brush that has an
  channel using #IMGFMT_JP2 or #IMGFMT_J2K, the JPEG2000 plugin will
  create a JP2 image with an alpha channel for you.


Version 1.2:    (18-May-23)
- Change: Amiga installer will now also copy the plugins for all platforms to
  linker plugins directory so that they can be easily linked to executables
- Change [iOS]: Added arm64 build for the iOS simulator and removed x86 build
for the iOS
  simulator because the iOS simulator is no longer compatible with x86
- Change [Android]: Removed build for 32-bit softfloat ARM; nobody uses this any
  these days
- New [macOS]: Added build for macOS arm64 (Apple Silicon) 
- New: Added support for Hollywood 10's ability to get the image format name;
  #ATTRFORMAT for images loaded using the plugin will now return either "JPEG
2000 (jp2)"
  or "JPEG 2000 (j2k)", depending on the format
- New: Plugin supports Hollywood 10's user tag interface for file adapters now;
  user tags will be forwarded to the corresponding file adapters now
- New: Added support for adapter-specific file saving (requires Hollywood 10)

Version 1.1:    (01-Jul-15)
- New [Linux]: Added build for Linux ARM
- Fix [Linux/MacOS]: Plugin is now compiled as position-independent code (PIC)
- Fix [OS3]: FPU version will cleanly exit now in case there is no FPU
- New: Added support for adapter-specific file loading (requires Hollywood 6.0)
- Fix: IsPicture() didn't return correct width, height, and alpha channel
- New: Plugin can save J2K images too now; use #IMGFMT_J2K for that
- New: Added file types information for Hollywood 5.3

Version 1.0:    (24-Mar-13)
- First release


This plugin was written by Andreas Falkenhahn <andreas()>
See the COPYING file in this package for conditions concerning distribution
of this plugin. Visit for more information.

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