fastports

libultrahdr 1.4.0

graphics/libultrahdr

Reference codec for the Ultra HDR format

Category
graphics
Maintainer
sunpoet@FreeBSD.org
WWW
https://developer.android.com/media/platform/hdr-image-format https://github.com/google/libultrahdr
License
APACHE20
USES
cmake jpeg

Description

libultrahdr is an image compression library that uses gain map technology to
store and distribute HDR images. Conceptually on the encoding side, the library
accepts SDR and HDR rendition of an image and from these a Gain Map (quotient
between the two renditions) is computed. The library then uses backward
compatible means to store the base image (SDR), gain map image and some
associated metadata. Legacy readers that do not support handling the gain map
image and/or metadata, will display the base image. Readers that support the
format combine the base image with the gain map and render a high dynamic range
image on compatible displays.

Dependencies

Commit History

may be incomplete — full history at freebsd-ports on GitHub

Commit Credits Log message
1.4.0
c22506b2e8 files touched 		Piotr Kubaj (pkubaj)
graphics/libultrahdr: add support for powerpc*
1.4.0
e49b2e2a09 files touched 		Po-Chuan Hsieh (sunpoet)
graphics/libultrahdr: Remove USES=pathfix
1.4.0
72501c88d4 files touched 		Po-Chuan Hsieh (sunpoet)
graphics/libultrahdr: Add libultrahdr 1.4.0
libultrahdr is an image compression library that uses gain map technology to
store and distribute HDR images. Conceptually on the encoding side, the library
accepts SDR and HDR rendition of an image and from these a Gain Map (quotient
between the two renditions) is computed. The library then uses backward
compatible means to store the base image (SDR), gain map image and some
associated metadata. Legacy readers that do not support handling the gain map
image and/or metadata, will display the base image. Readers that support the
format combine the base image with the gain map and render a high dynamic range
image on compatible displays.