OpenEXR is a high dynamic-range (HDR) image file format developed by
Industrial Light & Magic for use in computer imaging applications.
OpenEXR is used by ILM on all motion pictures currently in production.
The first movies to employ OpenEXR were Harry Potter and the Sorcerers Stone,
Men in Black II, Gangs of New York, and Signs. Since then, OpenEXR has become
ILM's main image file format.
OpenEXR's features include:
* Higher dynamic range and color precision than existing 8- and 10-bit
image file formats.
* Support for 16-bit floating-point, 32-bit floating-point, and 32-bit
integer pixels. The 16-bit floating-point format, called "half", is compatible
with the half data type in NVIDIA's Cg graphics language and is supported
natively on their new GeForce FX and Quadro FX 3D graphics solutions.
* Multiple lossless image compression algorithms. Some of the included codecs
can achieve 2:1 lossless compression ratios on images with film grain.
* Extensibility. New compression codecs and image types can easily be added
by extending the C++ classes included in the OpenEXR software distribution.
New image attributes (strings, vectors, integers, etc.) can be added to
OpenEXR image headers without affecting backward compatibility with existing
OpenEXR applications.
===> The following configuration options are available for openexr-3.1.6_1:
DOCS=on: Build and/or install documentation
EXAMPLES=on: Build and/or install examples
===> Use 'make config' to modify these settings
graphics/openexr: Fix ARMv7 build
OpenEXR 3.1.6 introduced several NEON-based optimizations
that implied Aarch64. Add patched, either picked from
upstream, or written by mandree@, to enable those
NEON features that also require Aarch64 only there.
PR-1366 is cherry-picked from upstream, and patch-lib/patch-test files
are my work but build upon said PR.
Also cherry-pick PR1354 that adds a missing check for AVX,
which is why I am bumping PORTREVISION because it might change
code (I have not checked).
https://github.com/AcademySoftwareFoundation/openexr/issues/1365
PR: 270348
Reported by: fuz@ (Robert Clausecker)
(cherry picked from commit 54d6860aac464b690f37007cfaef52c5a0b427b0)
