Part 1 of D1082 by Troy Sobotka, add API in OCIO for luminance

calculation.

6 files changed, 37 insertions, 1 deletions

diff --git a/intern/opencolorio/fallback_impl.cc b/intern/opencolorio/fallback_impl.cc
index d1493cb3ad5..136f427ee0e 100644
--- a/intern/opencolorio/fallback_impl.cc
+++ b/intern/opencolorio/fallback_impl.cc
@@ -162,6 +162,19 @@ const char *FallbackImpl::configGetDisplayColorSpaceName(OCIO_ConstConfigRcPtr *
 	return "sRGB";
 }
 
+void FallbackImpl::configGetDefaultLumaCoefs(OCIO_ConstConfigRcPtr * /*config*/, float *rgb)
+{
+ /* Here we simply use the older Blender assumed primaries of
+ * ITU-BT.709 / sRGB, or 0.2126729 0.7151522 0.0721750. Brute
+ * force stupid, but only plausible option given no color management
+ * system in place.
+ */
+
+ rgb[0] = 0.2126729f;
+ rgb[1] = 0.7151522f;
+ rgb[2] = 0.0721750f;
+}
+
 int FallbackImpl::configGetNumLooks(OCIO_ConstConfigRcPtr * /*config*/)
 {
 	return 0;
diff --git a/intern/opencolorio/ocio_capi.cc b/intern/opencolorio/ocio_capi.cc
index a4f2db456e8..7a0b9faa5fc 100644
--- a/intern/opencolorio/ocio_capi.cc
+++ b/intern/opencolorio/ocio_capi.cc
@@ -132,6 +132,11 @@ const char *OCIO_configGetDisplayColorSpaceName(OCIO_ConstConfigRcPtr *config, c
 	return impl->configGetDisplayColorSpaceName(config, display, view);
 }
 
+void OCIO_configGetDefaultLumaCoefs(OCIO_ConstConfigRcPtr *config, float *rgb)
+{
+	impl->configGetDefaultLumaCoefs(config, rgb);
+}
+
 int OCIO_configGetNumLooks(OCIO_ConstConfigRcPtr *config)
 {
 	return impl->configGetNumLooks(config);
diff --git a/intern/opencolorio/ocio_capi.h b/intern/opencolorio/ocio_capi.h
index d667dece62a..52a86727902 100644
--- a/intern/opencolorio/ocio_capi.h
+++ b/intern/opencolorio/ocio_capi.h
@@ -140,6 +140,8 @@ int         OCIO_configGetNumViews(OCIO_ConstConfigRcPtr *config, const char *di
 const char *OCIO_configGetView(OCIO_ConstConfigRcPtr *config, const char *display, int index);
 const char *OCIO_configGetDisplayColorSpaceName(OCIO_ConstConfigRcPtr *config, const char *display, const char *view);
 
+void        OCIO_configGetDefaultLumaCoefs(OCIO_ConstConfigRcPtr *config, float *rgb);
+
 int                  OCIO_configGetNumLooks(OCIO_ConstConfigRcPtr *config);
 const char          *OCIO_configGetLookNameByIndex(OCIO_ConstConfigRcPtr *config, int index);
 OCIO_ConstLookRcPtr *OCIO_configGetLook(OCIO_ConstConfigRcPtr *config, const char *name);
diff --git a/intern/opencolorio/ocio_impl.cc b/intern/opencolorio/ocio_impl.cc
index 5015f3a5c7d..bf5590077ef 100644
--- a/intern/opencolorio/ocio_impl.cc
+++ b/intern/opencolorio/ocio_impl.cc
@@ -272,6 +272,16 @@ const char *OCIOImpl::configGetDisplayColorSpaceName(OCIO_ConstConfigRcPtr *conf
 	return NULL;
 }
 
+void OCIOImpl::configGetDefaultLumaCoefs(OCIO_ConstConfigRcPtr *config, float *rgb)
+{
+	try {
+		(*(ConstConfigRcPtr *) config)->getDefaultLumaCoefs(rgb);
+	}
+	catch (Exception &exception) {
+		OCIO_reportException(exception);
+	}
+}
+
 int OCIOImpl::configGetNumLooks(OCIO_ConstConfigRcPtr *config)
 {
 	try {
diff --git a/intern/opencolorio/ocio_impl.h b/intern/opencolorio/ocio_impl.h
index 47e6d829902..f086bbb1a26 100644
--- a/intern/opencolorio/ocio_impl.h
+++ b/intern/opencolorio/ocio_impl.h
@@ -58,6 +58,8 @@ public:
 	virtual const char *configGetView(OCIO_ConstConfigRcPtr *config, const char *display, int index) = 0;
 	virtual const char *configGetDisplayColorSpaceName(OCIO_ConstConfigRcPtr *config, const char *display, const char *view) = 0;
 
+	virtual void configGetDefaultLumaCoefs(OCIO_ConstConfigRcPtr *config, float *rgb) = 0;
+
 	virtual int                  configGetNumLooks(OCIO_ConstConfigRcPtr *config) = 0;
 	virtual const char          *configGetLookNameByIndex(OCIO_ConstConfigRcPtr *config, int index) = 0;
 	virtual OCIO_ConstLookRcPtr *configGetLook(OCIO_ConstConfigRcPtr *config, const char *name) = 0;
@@ -145,6 +147,8 @@ public:
 	const char *configGetView(OCIO_ConstConfigRcPtr *config, const char *display, int index);
 	const char *configGetDisplayColorSpaceName(OCIO_ConstConfigRcPtr *config, const char *display, const char *view);
 
+	void configGetDefaultLumaCoefs(OCIO_ConstConfigRcPtr *config, float *rgb);
+
 	int                  configGetNumLooks(OCIO_ConstConfigRcPtr *config);
 	const char          *configGetLookNameByIndex(OCIO_ConstConfigRcPtr *config, int index);
 	OCIO_ConstLookRcPtr *configGetLook(OCIO_ConstConfigRcPtr *config, const char *name);
@@ -233,6 +237,8 @@ public:
 	const char *configGetView(OCIO_ConstConfigRcPtr *config, const char *display, int index);
 	const char *configGetDisplayColorSpaceName(OCIO_ConstConfigRcPtr *config, const char *display, const char *view);
 
+	void configGetDefaultLumaCoefs(OCIO_ConstConfigRcPtr *config, float *rgb);
+
 	int                  configGetNumLooks(OCIO_ConstConfigRcPtr *config);
 	const char          *configGetLookNameByIndex(OCIO_ConstConfigRcPtr *config, int index);
 	OCIO_ConstLookRcPtr *configGetLook(OCIO_ConstConfigRcPtr *config, const char *name);
diff --git a/release/datafiles/colormanagement/config.ocio b/release/datafiles/colormanagement/config.ocio
index 1cf9a3bb36e..7ecc9768d57 100644
--- a/release/datafiles/colormanagement/config.ocio
+++ b/release/datafiles/colormanagement/config.ocio
@@ -6,7 +6,7 @@ ocio_profile_version: 1
 
 search_path: luts
 strictparsing: true
-luma: [0.2126, 0.7152, 0.0722]
+luma: [0.2126729, 0.7151522, 0.0721750]
 
 description: RRT version ut33