Index: trunk/psModules/src/objects/pmSourcePhotometry.h
===================================================================
--- trunk/psModules/src/objects/pmSourcePhotometry.h	(revision 31670)
+++ trunk/psModules/src/objects/pmSourcePhotometry.h	(revision 33963)
@@ -38,4 +38,11 @@
 } pmSourcePhotometryMode;
 
+typedef enum {
+    PM_SOURCE_PHOTFIT_NONE       = 0,
+    PM_SOURCE_PHOTFIT_CONST      = 1,
+    PM_SOURCE_PHOTFIT_IMAGE_VAR  = 2,
+    PM_SOURCE_PHOTFIT_MODEL_VAR  = 3,
+} pmSourceFitVarMode;
+
 bool pmSourcePhotometryModel(
     float *fitMag,                      ///< integrated fit magnitude
@@ -75,7 +82,7 @@
 bool pmSourceMeasureDiffStats (pmSource *source, psImageMaskType maskVal, psImageMaskType markVal);
 
-double pmSourceDataDotModel (const pmSource *Mi, const pmSource *Mj, const bool unweighted_sum, const float covarFactor, psImageMaskType maskVal);
-double pmSourceModelDotModel (const pmSource *Mi, const pmSource *Mj, const bool unweighted_sum, const float covarFactor, psImageMaskType maskVal);
-double pmSourceModelWeight(const pmSource *Mi, int term, const bool unweighted_sum, const float covarFactor, psImageMaskType maskVal);
+double pmSourceDataDotModel (const pmSource *Mi, const pmSource *Mj, const pmSourceFitVarMode fitVarMode, const float covarFactor, psImageMaskType maskVal);
+double pmSourceModelDotModel (const pmSource *Mi, const pmSource *Mj, const pmSourceFitVarMode fitVarMode, const float covarFactor, psImageMaskType maskVal);
+double pmSourceModelWeight(const pmSource *Mi, int term, const pmSourceFitVarMode fitVarMode, const float covarFactor, psImageMaskType maskVal);
 
 bool pmSourceNeighborFlags (pmSource *source);