Introduction

JasPer is a collection of software (i.e., a library and application programs) for the coding and manipulation of images. This software can handle image data in a variety of formats. One such format supported by JasPer is the JPEG-2000 format defined in ISO/IEC 15444-1. This software was developed by Michael Adams from the Department of Electrical and Computer Engineering at the University of Victoria, Victoria, BC, Canada.

Features

Some of the features of the JasPer library are as follows:

has multithreading support (e.g., the JasPer library can be used concurrently in multiple threads)
native support for several image codecs, including:
- JPEG-2000 JP2 File Format Syntax (ISO/IEC 15444-1)
- JPEG-2000 Code Stream Syntax (ISO/IEC 15444-1)
- Portable Graymap/Pixmap (PNM)
- Microsoft Bitmap (BMP)
- Sun Rasterfile (RAS)
- JPEG-2000 VM Format (PGX)
non-native support for following image codecs:
- JPEG (ISO/IEC 10918-1) via IJG JPEG Library
- HEIC via the libheif Library
can add new codecs (or enable/disable codecs) at run time
can specify memory allocator to be used by library
can specify logging function to be used by library for error, warning, informational, and debugging messages
can place upper limit on total amount of memory used by library (which is useful in protecting against malicious image streams during decoding)
can decode from a non-seekable source stream (which is useful for filtering pipelines)
can manage ICC profiles
portable code known to work on many platforms (e.g., Linux, Windows, MacOS, BSD, etc.)
can autodetect image format during decoding

Several application programs are also provided:

jasper, an image transcoder program for converting between image formats
imginfo, a program for querying the properties of an image, such as: width, height, number of components, and the number of bits per sample
imgcmp, a program for comparing two images using various distance metrics, such as peak absolute error (PAE), mean absolute error (MAE), and peak signal to noise ratio (PSNR)
jiv, an image viewer

News

In release 3.0.0 of JasPer, the following notable changes were made to the API and/or behavior of the library relative to earlier releases (and therefore impact backward compatibility):

The jas_init() and jas_cleanup() functions have been marked as deprecated. The replacements for these functions are described in Configuration, Initialization, and Shutdown.
The jas_init() function no longer registers jas_cleanup() as an atexit handler. So, the library user is now responsible for invoking jas_cleanup() at an appropriate time. This change was needed in order to better support the use of the JasPer library on some platforms.
In the I/O streams API, some of the integral types used in the parameter/return types of the following functions were changed to use size_t/ssize_t in order to address some longstanding API issues:
- jas_stream_memopen()
- jas_stream_read()
- jas_stream_write()
- jas_stream_copy()
- jas_stream_gobble()
- jas_stream_copy()
- jas_stream_pad()
In the I/O streams API, in some cases where the integral type used was changed from a signed to unsigned type, deprecated behavior that allowed for negative values was removed.
The jas_stream_memopen2() function has been deprecated.
More effort has been made to hide functions/macros that are internal to the JasPer library in an effort to prevent applications using such functions/macros (which can lead to many types of problems).

As part of the work done in preparing the JasPer 3.0.0 release, support for JasPer 3.0.0 was merged into the popular XV software, which can be obtained at:

https://github.com/jasper-software/xv.git

3.0.1 (2022-02-12)
==================

* Fix some build/portability issues (e.g., #317, #318).

3.0.0 (2022-02-05)
==================

VERY IMPORTANT NOTE:
This release of the JasPer software introduced some changes in the API
and/or behavior of the library relative to earlier releases, which may
necessitate some small changes in code using the library (e.g., to avoid
memory leaks or other problems).  Please refer to the "News" section
of the JasPer Reference Manual for more details.  For convenience,
this manual is available online (for various JasPer releases) at:
    https://jasper-software.github.io/jasper-manual

* Greatly improve documentation.
* Add support for multithreading.
* Add some customization points in the library, such as the memory allocator
  and error logging function.
* Add improved memory usage tracking and limiting.
* Add experimental partial encoding/decoding support for the HEIC format.
* Fix some longstanding issues in the JasPer I/O streams API.
* Add the running of the full test suite in CI builds for the Windows platform.
  (Previously, the full test suite was only run for CI builds on Unix-based
  platforms.)
* Fix many bugs (e.g., #305, #307, #308, #309, #312, #314, and many others
  not associated with any issue numbers).

* Merged support for JasPer 3.0.0 into the XV software at:
      https://github.com/jasper-software/xv.git

2.0.33 (2021-08-01)
===================

* Fix a JP2/JPC decoder bug. (#291)
* Fix a build issue impacting some platforms. (#296)

2.0.32 (2021-04-18)
===================

* Test release performed with GitHub Actions.

2.0.29 (2021-04-16)
===================

* Loosen some overly tight restrictions on JP2 codestreams, which caused
  some valid codestreams to be rejected. (#289)

2.0.28 (2021-03-29)
===================

* Fix potential null pointer dereference in the JP2/JPC decoder. (#269)
* Fix ignoring of JAS_STREAM_FILEOBJ_NOCLOSE at stream close time. (#286)
* Fix integral type sizing problem in JP2 codec. (#284)

2.0.27 (2021-03-18)
===================

* Check for an image containing no samples in the PGX
  decoder. (#271, #272, #273, #274, #275, #276, #281)
* Check for dimensions of zero in the JPC and JPEG decoders.
* Fix an arguably incorrect type for an integer literal
  in the PGX decoder. (#270)
* Check for an invalid component reference in the
  JP2 decoder. (#269)
* Check on integer size in JP2 decoder. (#278)

2.0.26 (2021-03-05)
===================

* Fix JP2 decoder bug that can cause a null pointer dereference for
  some invalid CDEF boxes. (#268) (CVE-2021-3467)

2.0.25 (2021-02-07)
===================

* Fix memory-related bugs in the JPEG-2000 codec resulting from
  attempting to decode invalid code streams. (#264, #265)
  This fix is associated with CVE-2021-26926 and CVE-2021-26927.
* Fix wrong return value under some compilers (#260)
* Fix CVE-2021-3272 heap buffer overflow in jp2_decode (#259) 

2.0.24 (2021-01-03)
===================

* Add JAS_VERSION_MAJOR, JAS_VERSION_MINOR, JAS_VERSION_PATCH
  for easier access to the JasPer version.
* Fixes stack overflow bug on Windows, where variable-length
  arrays are not available. (#256)

2.0.23 (2020-12-08)
===================

* Fix CVE-2020-27828, heap-overflow in cp_create() in jpc_enc.c
  https://github.com/jasper-software/jasper/issues/252

2.0.22 (2020-10-05)
===================

* Update manual

* Remove JPEG dummy codec. Jasper needs libjpeg for JPEG support

* Fix test suite build failure regarding disabled MIF codec (#249)

* Fix OpenGL/glut detection (#247)

2.0.21 (2020-09-20)
===================

* Fix ZDI-15-529
  https://github.com/jasper-software/jasper/pull/245

* Fix CVE-2018-19541 in decoder
  https://github.com/jasper-software/jasper/pull/244

2.0.20 (2020-09-05)
===================

* Fix several ISO/IEC 15444-4 conformance bugs

* Fix new variant of CVE-2016-9398

* Disable the MIF codec by default for security reasons (but it is still
  included in the library);
  in a future release, the MIF codec may also be excluded from the
  library by default

* Add documentation for the I/O streams library API

2.0.19 (2020-07-11)
===================

* Fix CVE-2021-27845
  https://github.com/mdadams/jasper/issues/194 (part 1)

* Fix CVE-2018-9154
  https://github.com/jasper-software/jasper/issues/215
  https://github.com/jasper-software/jasper/issues/166
  https://github.com/jasper-software/jasper/issues/175
  https://github.com/jasper-maint/jasper/issues/8

* Fix CVE-2018-19541 in encoder
  https://github.com/jasper-software/jasper/pull/199
  https://github.com/jasper-maint/jasper/issues/6

* Fix CVE-2016-9399, CVE-2017-13751
  https://github.com/jasper-maint/jasper/issues/1

* Fix CVE-2018-19540
  https://github.com/jasper-software/jasper/issues/182
  https://github.com/jasper-maint/jasper/issues/22

* Fix CVE-2018-9055
  https://github.com/jasper-maint/jasper/issues/9

* Fix CVE-2017-13748
  https://github.com/jasper-software/jasper/issues/168

* Fix CVE-2017-5503, CVE-2017-5504, CVE-2017-5505
  https://github.com/jasper-maint/jasper/issues/3
  https://github.com/jasper-maint/jasper/issues/4
  https://github.com/jasper-maint/jasper/issues/5
  https://github.com/jasper-software/jasper/issues/88
  https://github.com/jasper-software/jasper/issues/89
  https://github.com/jasper-software/jasper/issues/90

* Fix CVE-2018-9252
  https://github.com/jasper-maint/jasper/issues/16

* Fix CVE-2018-19139
  https://github.com/jasper-maint/jasper/issues/14

* Fix CVE-2018-19543, CVE-2017-9782
  https://github.com/jasper-maint/jasper/issues/13
  https://github.com/jasper-maint/jasper/issues/18
  https://github.com/jasper-software/jasper/issues/140
  https://github.com/jasper-software/jasper/issues/182

* Fix CVE-2018-20570
  https://github.com/jasper-maint/jasper/issues/11
  https://github.com/jasper-software/jasper/issues/191

* Fix CVE-2018-20622
  https://github.com/jasper-maint/jasper/issues/12
  https://github.com/jasper-software/jasper/issues/193

* Fix CVE-2016-9398
  https://github.com/jasper-maint/jasper/issues/10

* Fix CVE-2017-14132
  https://github.com/jasper-maint/jasper/issues/17

* Fix CVE-2017-5499
  https://github.com/jasper-maint/jasper/issues/2
  https://github.com/jasper-software/jasper/issues/63

* Fix CVE-2018-18873
  https://github.com/jasper-maint/jasper/issues/15
  https://github.com/jasper-software/jasper/issues/184

* Fix https://github.com/jasper-software/jasper/issues/207

* Fix https://github.com/jasper-software/jasper/issues/194 part 1

* Fix CVE-2017-13750
  https://github.com/jasper-software/jasper/issues/165
  https://github.com/jasper-software/jasper/issues/174

* New option -DJAS_ENABLE_HIDDEN=true to not export internal symbols in the public symbol table

* Fix various memory leaks

* Plenty of code cleanups, and performance improvements

* Some macros were changed to inline functions.  This has to potential to
  impact some code that made assumptions about the implementation.  Some
  potentially impacted macros include:
      jas_matrix_numrows, jas_matrix_numcols
      jas_matrix_get
      jas_seq_get, jas_seq_start, jas_seq_end
      jpc_ms_gettype
      jas_matrix_set and jas_seq_set is affected differently; the old macro was
      an actual expression returning the value, while the new function does not.
  The following macros have been changed, too, but are likely not
  affected, since they have been an rvalue-expression anyway:
      JP2_DTYPETOBPC, JP2_BPCTODTYPE
      JAS_IMAGE_CDT_{SETSGND,GETSGND,SETPREC,GETPREC}
      jas_image_cmptdtype
      macros from here
      jas_matrix_setv, jas_matrix_getvref
      jas_matrix_bind{row,col}
      the jpc_fix_ family
      the JPC_QCX and JPC_COX families