macOS
Homebrewverified · 100%
brew install ctllocal Homebrew formula metadata
brew
Install ctl with Homebrew, dnf, zypper
Programming language for digital color management. Version 1.5.5 via Homebrew; verified 2026-06-06.
install
Additional install commands
Linux
Fedora dnfverified · 92%
sudo dnf install CTLFedora Rawhide package metadata · CTL · source: dl.fedoraproject.org
openSUSE zypperverified · 92%
sudo zypper install ctlopenSUSE Tumbleweed package metadata · ctl · source: download.opensuse.org
overview
Package summary
Programming language for digital color management
Project links
Commands and aliases
- ctlrender
- exr_ctl_exr
- exrdpx
history
Project history and usage
CTL, the Color Transformation Language, is a small domain-specific programming language for digital color management. The official repository presents it as a standalone project maintained in the ACES ecosystem and used to express portable color transforms.
Project history
CTL was designed so color transforms could be distributed as concise programs and interpreted consistently by color-management systems. Its syntax, concepts, and functions are documented in SMPTE RDD 15, and the repository contains the interpreter, libraries, ctlrender command, OpenEXR sample applications, tests, and documentation.
The current official source is maintained under the aces-aswf organization. The README explicitly separates CTL from ACES: ACES uses CTL for reference transforms, but CTL itself can describe any color transform.
Adoption history
The README frames CTL around interchange: two parties using the same CTL program and parameters can apply the identical transform to an image. Installation docs list Homebrew as the quickest macOS path, source builds for Linux, macOS, and Windows, and Docker as an isolated runtime.
How it is used
The main command-line workflow is ctlrender, which applies a CTL transform to image files such as OpenEXR inputs. The package also ships OpenEXR-oriented sample tools used in color-pipeline testing and conversion workflows.
Why package nerds care
CTL matters to package maintainers because it packages a film-industry color DSL together with C++ libraries, OpenEXR integration, command-line rendering tools, and optional containerized builds. It sits at the boundary between media standards, developer tooling, and reproducible color pipelines.
Timeline
- 2007: CTL language material was documented in SMPTE RDD 15.
- 2024: ctl-1.5.3 release published on GitHub.
- 2026: ctl-1.5.5 release published on GitHub.
Related projects
- CTL is maintained in the ACES project ecosystem and is commonly encountered alongside ACES, OpenEXR, and color-management tooling, while remaining a distinct language.
Sources
security posture
Risk level: yellow
generalized runtime or code generation signal.
Risk classifier
yellow risk · medium confidence · runtime
Why
- generalized runtime or code generation signal
Signals
- text:programming language
Install behavior
- No Homebrew post-install hook is recorded in formula metadata.
- Homebrew bottle metadata is available for 6 platform targets.
- Installs with 3 runtime dependencies.
- Build metadata lists 1 build dependencies.
Recommended review
Before unattended agent use, check whether the tool reads plaintext credentials, writes remote state, publishes artifacts, or shells out to plugins.
executables
Installed executables
| Command | Kind | Exposure | Note |
|---|---|---|---|
ctlrender | cli | global executable | |
exr_ctl_exr | cli | global executable | |
exrdpx | cli | global executable |
freshness
Version and freshness
These signals separate page generation age, package-manager activity, and upstream release comparison. Version lag is warned only when an evidence URL and comparable versions are present.
page generated2026-07-08
manager version1.5.5
manager updated2026-06-06
local dataok
upstreamcurrent
latest detectedctl-1.5.5
https://github.com/aces-aswf/CTL
- okNo freshness warnings were generated.
install metadata
Package metadata
| Package key | brew:ctl |
|---|---|
| Version | 1.5.5 |
| Package manager | Homebrew |
| Package manager page | https://formulae.brew.sh/formula/ctl |
| Homepage | https://github.com/aces-aswf/CTL |
| Repository | https://github.com/aces-aswf/CTL |
| Upstream docs | https://github.com/ampas/CTL#readme |
| License | AMPAS |
| Source archive | https://github.com/aces-aswf/CTL/archive/refs/tags/ctl-1.5.5.tar.gz |
| Last updated | 2026-06-06T04:08:13Z |
| Pulse | updated |
| Dependencies | imath, libtiff, openexr |
| Build dependencies | cmake |
| Bottle | available (on arm64_linux, arm64_sequoia, arm64_sonoma, arm64_tahoe, sonoma, x86_64_linux) |
| Homebrew post-install | not defined |
| Service | none declared |
registry facts
Source database details
| Source Database | Homebrew formula API |
|---|---|
| Tap | homebrew/core |
| Full Name | ctl |
| Version Scheme | 0 |
| Revision | 0 |
| Head Version | HEAD |
| Bottle Stable Root URL | https://ghcr.io/v2/homebrew/core |
| Deprecated | no |
| Disabled | no |
| Keg Only | no |
| URL Keys |
|
source database matches
Other package-manager records
Matches are pulled from external package-manager indexes and kept separate from local Automic Vault package links.
dnf95%
CTL 1.5.3-8.fc45
The Color Transformation Language
sudo dnf install CTL- License: AMPAS
- Category: Unspecified
- Architecture: i686
- Source Package: CTL
- 8 dependencies
- 6 provides
- normalized package name match
- Matched by: Ctl
dnf95%
CTL-devel 1.5.3-8.fc45
Development files for CTL
sudo dnf install CTL-devel- License: AMPAS
- Category: Unspecified
- Architecture: i686
- Source Package: CTL
- 13 dependencies
- 3 provides
- normalized package name match
- Matched by: Ctl
dnf95%
CTL-docs 1.5.3-8.fc45
Documentation for CTL
sudo dnf install CTL-docs- License: AMPAS
- Category: Unspecified
- Architecture: x86_64
- Source Package: CTL
- 1 provides
- normalized package name match
- Matched by: Ctl
dnf95%
OpenEXR_CTL 1.5.3-8.fc45
A simplified OpenEXR interface to CTL
sudo dnf install OpenEXR_CTL- License: AMPAS
- Category: Unspecified
- Architecture: x86_64
- Source Package: CTL
- 14 dependencies
- 1 provides
- normalized package name match
- Matched by: Ctl
zypper95%
ctl 1.5.5-1.2
Programming language for digital color management
sudo zypper install ctl- License: AMPAS
- Category: Unspecified
- Architecture: x86_64
- Source Package: ctl
- 11 dependencies
- 1 provides
- normalized package name match
- Matched by: Ctl
zypper95%
ctl-data 1.5.5-1.2
Contains various CTL files
sudo zypper install ctl-data- License: AMPAS
- Category: Unspecified
- Architecture: noarch
- Source Package: ctl
- 1 provides
- normalized package name match
- Matched by: Ctl
zypper95%
ctl-devel 1.5.5-1.2
Development package for CTL
sudo zypper install ctl-devel- License: AMPAS
- Category: Development/Libraries/C and C++
- Architecture: x86_64
- Source Package: ctl
- 5 dependencies
- 1 provides
- normalized package name match
- Matched by: Ctl
zypper95%
ctl-doc 1.5.5-1.2
Documentation files for CTL
sudo zypper install ctl-doc- License: AMPAS
- Category: Unspecified
- Architecture: noarch
- Source Package: ctl
- 1 provides
- normalized package name match
- Matched by: Ctl
zypper95%
libIlmCtl1_5 1.5.5-1.2
Interpreter for the Color Transformation Language
sudo zypper install libIlmCtl1_5- License: AMPAS
- Category: System/Libraries
- Architecture: x86_64
- Source Package: ctl
- 7 dependencies
- 2 provides
- normalized package name match
- Matched by: Ctl
zypper95%
libIlmCtlMath1_5 1.5.5-1.2
Math functions for the Color Transformation Language
sudo zypper install libIlmCtlMath1_5- License: AMPAS
- Category: System/Libraries
- Architecture: x86_64
- Source Package: ctl
- 7 dependencies
- 2 provides
- normalized package name match
- Matched by: Ctl
zypper95%
libIlmCtlSimd1_5 1.5.5-1.2
SIMD execution for the the Color Transformation Language
sudo zypper install libIlmCtlSimd1_5- License: AMPAS
- Category: System/Libraries
- Architecture: x86_64
- Source Package: ctl
- 10 dependencies
- 2 provides
- normalized package name match
- Matched by: Ctl
zypper95%
libIlmImfCtl1_5 1.5.5-1.2
OpenEXR interface to CTL
sudo zypper install libIlmImfCtl1_5- License: AMPAS
- Category: System/Libraries
- Architecture: x86_64
- Source Package: ctl
- 9 dependencies
- 2 provides
- normalized package name match
- Matched by: Ctl
source trail
Generated from repository data
This page is generated by av-web from the private package SQLite artifact built by scripts/generate-pkg-sqlite.py.
Combined YAML source
View the package source record on GitHub.
Used sources
- Geiger risk classifier
- Nucleus package database
- av.db category and tag curation
- cross-ecosystem install command graph
- curated package history
- external package-manager database matches
- package relationship graph
- package version freshness
- package-page enrichment