feat: Add OpenColorIO option to OpenImageIO (#47237)

* feat: Add OpenColorIO option to OpenImageIO

* style: Pep 8

---------

Co-authored-by: Beat Reichenbach <beatreichenbach@users.noreply.github.com>

var/spack/repos/builtin/packages/opencolorio/package.py

@@ -0,0 +1,39 @@
+# Copyright 2013-2024 Lawrence Livermore National Security, LLC and other
+# Spack Project Developers. See the top-level COPYRIGHT file for details.
+#
+# SPDX-License-Identifier: (Apache-2.0 OR MIT)
+
+from spack.package import *
+
+
+class Opencolorio(CMakePackage):
+    """OpenColorIO (OCIO) is a complete color management solution geared towards motion
+    picture production with an emphasis on visual effects and computer animation."""
+
+    homepage = "https://opencolorio.readthedocs.io"
+    git = "https://github.com/AcademySoftwareFoundation/OpenColorIO"
+    url = (
+        "https://github.com/AcademySoftwareFoundation/OpenColorIO/archive/refs/tags/v2.4.0.tar.gz"
+    )
+    license("Apache-2.0")
+
+    version("2.4.0", sha256="0ff3966b9214da0941b2b1cbdab3975a00a51fc6f3417fa860f98f5358f2c282")
+
+    # Core dependencies
+    depends_on("cmake@3.14:", type="build")
+    depends_on("expat@2.2.8:")
+    depends_on("yaml-cpp@0.6.3:")
+    depends_on("imath@3.0.5:")
+    depends_on("pystring@1.1.3:")
+
+    # Optional dependencies
+    variant("lcms", default=False, description="Little CMS for ociobakelut")
+    depends_on("lcms@2.2:", when="+lcms")
+
+    variant("python", default=False, description="Build python bindings")
+    extends("python", when="+python")
+    depends_on("py-pybind11", when="+python", type=("build", "run"))
+
+    def cmake_args(self):
+        args = ["-DOCIO_BUILD_PYTHON={0}".format("ON" if "+python" in self.spec else "OFF")]
+        return args

var/spack/repos/builtin/packages/openimageio/package.py

@@ -42,6 +42,9 @@ class Openimageio(CMakePackage):
     variant("qt", default=False, description="Build qt viewer")
     depends_on("qt@5.6.0:+opengl", when="+qt")
 
+    variant("ocio", default=False, description="Support video frames")
+    depends_on("opencolorio@2.2:", when="+ocio")
+
     def url_for_version(self, version):
         if version >= Version("2"):
             return super().url_for_version(version)

var/spack/repos/builtin/packages/pystring/package.py

@@ -0,0 +1,21 @@
+# Copyright 2013-2024 Lawrence Livermore National Security, LLC and other
+# Spack Project Developers. See the top-level COPYRIGHT file for details.
+#
+# SPDX-License-Identifier: (Apache-2.0 OR MIT)
+
+from spack.package import *
+
+
+class Pystring(CMakePackage):
+    """Pystring is a collection of C++ functions which match the interface and behavior
+    of python's string class methods using std::string."""
+
+    git = "https://github.com/imageworks/pystring"
+    url = "https://github.com/imageworks/pystring/archive/refs/tags/v1.1.4.tar.gz"
+
+    license("Apache-2.0")
+
+    version("1.1.4", sha256="49da0fe2a049340d3c45cce530df63a2278af936003642330287b68cefd788fb")
+
+    # Core dependencies
+    depends_on("cmake@3.27.9:", type="build")