Color Management: add support for OpenColorIO color space aliases

This enables the configuration to specify aliases for compatibility with other
configurations.

When a colorspace name is saved in a.blend, that is the alias of a colorspace
in the current configuration, it will show the main colorspace from the
configuration in the user interface and Python API instead.

Loading & saving the .blend file does not make any changes to the stored name,
so as to not make hidden modifications. Only when setting the property again
will the alias name be overwritten by the main colorspace name.

Fixes T96049

Differential Revision: https://developer.blender.org/D14419

5 files changed, 37 insertions, 0 deletions

diff --git a/intern/opencolorio/fallback_impl.cc b/intern/opencolorio/fallback_impl.cc
index 82bd4d9fc36..aaab8b4e6b9 100644
--- a/intern/opencolorio/fallback_impl.cc
+++ b/intern/opencolorio/fallback_impl.cc
@@ -445,6 +445,16 @@ const char *FallbackImpl::colorSpaceGetFamily(OCIO_ConstColorSpaceRcPtr * /*cs*/
   return "";
 }
 
+int FallbackImpl::colorSpaceGetNumAliases(OCIO_ConstColorSpaceRcPtr * /*cs*/)
+{
+  return 0;
+}
+const char *FallbackImpl::colorSpaceGetAlias(OCIO_ConstColorSpaceRcPtr * /*cs*/,
+                                             const int /*index*/)
+{
+  return "";
+}
+
 OCIO_ConstProcessorRcPtr *FallbackImpl::createDisplayProcessor(OCIO_ConstConfigRcPtr * /*config*/,
                                                                const char * /*input*/,
                                                                const char * /*view*/,
diff --git a/intern/opencolorio/ocio_capi.cc b/intern/opencolorio/ocio_capi.cc
index 7e7710843e2..91784a288c8 100644
--- a/intern/opencolorio/ocio_capi.cc
+++ b/intern/opencolorio/ocio_capi.cc
@@ -234,6 +234,16 @@ const char *OCIO_colorSpaceGetFamily(OCIO_ConstColorSpaceRcPtr *cs)
   return impl->colorSpaceGetFamily(cs);
 }
 
+int OCIO_colorSpaceGetNumAliases(OCIO_ConstColorSpaceRcPtr *cs)
+{
+  return impl->colorSpaceGetNumAliases(cs);
+}
+
+const char *OCIO_colorSpaceGetAlias(OCIO_ConstColorSpaceRcPtr *cs, const int index)
+{
+  return impl->colorSpaceGetAlias(cs, index);
+}
+
 OCIO_ConstProcessorRcPtr *OCIO_createDisplayProcessor(OCIO_ConstConfigRcPtr *config,
                                                       const char *input,
                                                       const char *view,
diff --git a/intern/opencolorio/ocio_capi.h b/intern/opencolorio/ocio_capi.h
index 87a8043aec6..5c036ec263a 100644
--- a/intern/opencolorio/ocio_capi.h
+++ b/intern/opencolorio/ocio_capi.h
@@ -157,6 +157,8 @@ void OCIO_cpuProcessorRelease(OCIO_ConstCPUProcessorRcPtr *processor);
 const char *OCIO_colorSpaceGetName(OCIO_ConstColorSpaceRcPtr *cs);
 const char *OCIO_colorSpaceGetDescription(OCIO_ConstColorSpaceRcPtr *cs);
 const char *OCIO_colorSpaceGetFamily(OCIO_ConstColorSpaceRcPtr *cs);
+int OCIO_colorSpaceGetNumAliases(OCIO_ConstColorSpaceRcPtr *cs);
+const char *OCIO_colorSpaceGetAlias(OCIO_ConstColorSpaceRcPtr *cs, const int index);
 
 OCIO_ConstProcessorRcPtr *OCIO_createDisplayProcessor(OCIO_ConstConfigRcPtr *config,
                                                       const char *input,
diff --git a/intern/opencolorio/ocio_impl.cc b/intern/opencolorio/ocio_impl.cc
index a02a37522b9..ca1b7cc42e1 100644
--- a/intern/opencolorio/ocio_impl.cc
+++ b/intern/opencolorio/ocio_impl.cc
@@ -640,6 +640,15 @@ const char *OCIOImpl::colorSpaceGetFamily(OCIO_ConstColorSpaceRcPtr *cs)
   return (*(ConstColorSpaceRcPtr *)cs)->getFamily();
 }
 
+int OCIOImpl::colorSpaceGetNumAliases(OCIO_ConstColorSpaceRcPtr *cs)
+{
+  return (*(ConstColorSpaceRcPtr *)cs)->getNumAliases();
+}
+const char *OCIOImpl::colorSpaceGetAlias(OCIO_ConstColorSpaceRcPtr *cs, const int index)
+{
+  return (*(ConstColorSpaceRcPtr *)cs)->getAlias(index);
+}
+
 OCIO_ConstProcessorRcPtr *OCIOImpl::createDisplayProcessor(OCIO_ConstConfigRcPtr *config_,
                                                            const char *input,
                                                            const char *view,
diff --git a/intern/opencolorio/ocio_impl.h b/intern/opencolorio/ocio_impl.h
index 5be1d3aacf8..d42fa58121f 100644
--- a/intern/opencolorio/ocio_impl.h
+++ b/intern/opencolorio/ocio_impl.h
@@ -76,6 +76,8 @@ class IOCIOImpl {
   virtual const char *colorSpaceGetName(OCIO_ConstColorSpaceRcPtr *cs) = 0;
   virtual const char *colorSpaceGetDescription(OCIO_ConstColorSpaceRcPtr *cs) = 0;
   virtual const char *colorSpaceGetFamily(OCIO_ConstColorSpaceRcPtr *cs) = 0;
+  virtual int colorSpaceGetNumAliases(OCIO_ConstColorSpaceRcPtr *cs) = 0;
+  virtual const char *colorSpaceGetAlias(OCIO_ConstColorSpaceRcPtr *cs, const int index) = 0;
 
   virtual OCIO_ConstProcessorRcPtr *createDisplayProcessor(OCIO_ConstConfigRcPtr *config,
                                                            const char *input,
@@ -190,6 +192,8 @@ class FallbackImpl : public IOCIOImpl {
   const char *colorSpaceGetName(OCIO_ConstColorSpaceRcPtr *cs);
   const char *colorSpaceGetDescription(OCIO_ConstColorSpaceRcPtr *cs);
   const char *colorSpaceGetFamily(OCIO_ConstColorSpaceRcPtr *cs);
+  int colorSpaceGetNumAliases(OCIO_ConstColorSpaceRcPtr *cs);
+  const char *colorSpaceGetAlias(OCIO_ConstColorSpaceRcPtr *cs, const int index);
 
   OCIO_ConstProcessorRcPtr *createDisplayProcessor(OCIO_ConstConfigRcPtr *config,
                                                    const char *input,
@@ -277,6 +281,8 @@ class OCIOImpl : public IOCIOImpl {
   const char *colorSpaceGetName(OCIO_ConstColorSpaceRcPtr *cs);
   const char *colorSpaceGetDescription(OCIO_ConstColorSpaceRcPtr *cs);
   const char *colorSpaceGetFamily(OCIO_ConstColorSpaceRcPtr *cs);
+  int colorSpaceGetNumAliases(OCIO_ConstColorSpaceRcPtr *cs);
+  const char *colorSpaceGetAlias(OCIO_ConstColorSpaceRcPtr *cs, const int index);
 
   OCIO_ConstProcessorRcPtr *createDisplayProcessor(OCIO_ConstConfigRcPtr *config,
                                                    const char *input,