Python/CurveMapping: add Curve Mapping functions to add/remove curve points,

evaluate the curve and update after changes.

source/blender/blenkernel/BKE_colortools.h

@@ -33,6 +33,7 @@
 
 struct CurveMapping;
 struct CurveMap;
+struct CurveMapPoint;
 struct Scopes;
 struct ImBuf;
 struct rctf;
@@ -52,12 +53,14 @@ void                curvemapping_set_black_white(struct CurveMapping *cumap, con
 
 #define CURVEMAP_SLOPE_NEGATIVE 0
 #define CURVEMAP_SLOPE_POSITIVE 1
-void                curvemap_reset(struct CurveMap *cuma, struct rctf *clipr, int preset, int slope);
+void                    curvemap_reset(struct CurveMap *cuma, struct rctf *clipr, int preset, int slope);
-void                curvemap_remove(struct CurveMap *cuma, int flag);
+void                    curvemap_remove(struct CurveMap *cuma, int flag);
-void                curvemap_insert(struct CurveMap *cuma, float x, float y);
+void                    curvemap_remove_point(struct CurveMap *cuma, struct CurveMapPoint *cmp);
-void                curvemap_sethandle(struct CurveMap *cuma, int type);
+struct CurveMapPoint    *curvemap_insert(struct CurveMap *cuma, float x, float y);
+void                    curvemap_sethandle(struct CurveMap *cuma, int type);
 
 void                curvemapping_changed(struct CurveMapping *cumap, int rem_doubles);
+void                curvemapping_changed_all(struct CurveMapping *cumap);
 
 /* single curve, no table check */
 float               curvemap_evaluateF(struct CurveMap *cuma, float value);

source/blender/blenkernel/intern/colortools.c

@@ -146,6 +146,32 @@ void curvemapping_set_black_white(CurveMapping *cumap, const float black[3], con
 /* ***************** operations on single curve ************* */
 /* ********** NOTE: requires curvemapping_changed() call after ******** */
 
+/* remove specified point */
+void curvemap_remove_point(CurveMap *cuma, CurveMapPoint *point)
+{
+	CurveMapPoint *cmp;
+	int a, b, removed = 0;
+	
+	/* must have 2 points minimum */
+	if (cuma->totpoint <= 2)
+		return;
+
+	cmp = MEM_mallocN((cuma->totpoint) * sizeof(CurveMapPoint), "curve points");
+
+	/* well, lets keep the two outer points! */
+	for (a = 0, b = 0; a < cuma->totpoint; a++) {
+		if (&cuma->curve[a] != point) {
+			cmp[b] = cuma->curve[a];
+			b++;
+		}
+		else removed++;
+	}
+	
+	MEM_freeN(cuma->curve);
+	cuma->curve = cmp;
+	cuma->totpoint -= removed;
+}
+
 /* removes with flag set */
 void curvemap_remove(CurveMap *cuma, int flag)
 {
@@ -168,9 +194,10 @@ void curvemap_remove(CurveMap *cuma, int flag)
 	cuma->totpoint -= removed;
 }
 
-void curvemap_insert(CurveMap *cuma, float x, float y)
+CurveMapPoint *curvemap_insert(CurveMap *cuma, float x, float y)
 {
 	CurveMapPoint *cmp = MEM_callocN((cuma->totpoint + 1) * sizeof(CurveMapPoint), "curve points");
+	CurveMapPoint *newcmp = NULL;
 	int a, b, foundloc = 0;
 		
 	/* insert fragments of the old one and the new point to the new curve */
@@ -181,6 +208,7 @@ void curvemap_insert(CurveMap *cuma, float x, float y)
 			cmp[a].y = y;
 			cmp[a].flag = CUMA_SELECT;
 			foundloc = 1;
+			newcmp = &cmp[a];
 		}
 		else {
 			cmp[a].x = cuma->curve[b].x;
@@ -195,6 +223,8 @@ void curvemap_insert(CurveMap *cuma, float x, float y)
 	/* free old curve and replace it with new one */
 	MEM_freeN(cuma->curve);
 	cuma->curve = cmp;
+
+	return newcmp;
 }
 
 void curvemap_reset(CurveMap *cuma, rctf *clipr, int preset, int slope)
@@ -670,6 +700,20 @@ void curvemapping_changed(CurveMapping *cumap, int rem_doubles)
 	curvemap_make_table(cuma, clipr);
 }
 
+void curvemapping_changed_all(CurveMapping *cumap)
+{
+	int a, cur = cumap->cur;
+
+	for (a = 0; a < CM_TOT; a++) {
+		if (cumap->cm[a].curve) {
+			cumap->cur = a;
+			curvemapping_changed(cumap, 0);
+		}
+	}
+
+	cumap->cur = cur;
+}
+
 /* table should be verified */
 float curvemap_evaluateF(CurveMap *cuma, float value)
 {

source/blender/makesrna/intern/rna_color.c

@@ -320,18 +320,14 @@ static void rna_def_curvemappoint(BlenderRNA *brna)
 	srna = RNA_def_struct(brna, "CurveMapPoint", NULL);
 	RNA_def_struct_ui_text(srna, "CurveMapPoint", "Point of a curve used for a curve mapping");
 
-	/* not editable for now, need to have CurveMapping to do curvemapping_changed */
-
 	prop = RNA_def_property(srna, "location", PROP_FLOAT, PROP_XYZ);
 	RNA_def_property_float_sdna(prop, NULL, "x");
 	RNA_def_property_array(prop, 2);
-	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
 	RNA_def_property_ui_text(prop, "Location", "X/Y coordinates of the curve point");
 
 	prop = RNA_def_property(srna, "handle_type", PROP_ENUM, PROP_NONE);
 	RNA_def_property_enum_bitflag_sdna(prop, NULL, "flag");
 	RNA_def_property_enum_items(prop, prop_handle_type_items);
-	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
 	RNA_def_property_ui_text(prop, "Handle Type", "Curve interpolation at this point: Bezier or vector");
 
 	prop = RNA_def_property(srna, "select", PROP_BOOLEAN, PROP_NONE);
@@ -339,10 +335,38 @@ static void rna_def_curvemappoint(BlenderRNA *brna)
 	RNA_def_property_ui_text(prop, "Select", "Selection state of the curve point");
 }
 
+static void rna_def_curvemap_points_api(BlenderRNA *brna, PropertyRNA *cprop)
+{
+	StructRNA *srna;
+	PropertyRNA *parm;
+	FunctionRNA *func;
+
+	RNA_def_property_srna(cprop, "CurveMapPoints");
+	srna = RNA_def_struct(brna, "CurveMapPoints", NULL);
+	RNA_def_struct_sdna(srna, "CurveMap");
+	RNA_def_struct_ui_text(srna, "Curve Map Point", "Collection of Curve Map Points");
+
+	func = RNA_def_function(srna, "new", "curvemap_insert");
+	RNA_def_function_ui_description(func, "Add point to CurveMap");
+	parm = RNA_def_float(func, "position", 0.0f, -FLT_MAX, FLT_MAX, "Position", "Position to add point", -FLT_MAX, FLT_MAX);
+	RNA_def_property_flag(parm, PROP_REQUIRED);
+	parm = RNA_def_float(func, "value", 0.0f, -FLT_MAX, FLT_MAX, "Value", "Value of point", -FLT_MAX, FLT_MAX);
+	RNA_def_property_flag(parm, PROP_REQUIRED);
+	parm = RNA_def_pointer(func, "point", "CurveMapPoint", "", "New point");
+	RNA_def_function_return(func, parm);
+
+	func = RNA_def_function(srna, "remove", "curvemap_remove_point");
+	RNA_def_function_ui_description(func, "Delete point from CurveMap");
+	parm = RNA_def_pointer(func, "point", "CurveMapPoint", "", "PointElement to remove");
+	RNA_def_property_flag(parm, PROP_REQUIRED | PROP_NEVER_NULL);
+}
+
 static void rna_def_curvemap(BlenderRNA *brna)
 {
 	StructRNA *srna;
-	PropertyRNA *prop;
+	PropertyRNA *prop, *parm;
+	FunctionRNA *func;
+
 	static EnumPropertyItem prop_extend_items[] = {
 		{0, "HORIZONTAL", 0, "Horizontal", ""},
 		{CUMA_EXTEND_EXTRAPOLATE, "EXTRAPOLATED", 0, "Extrapolated", ""},
@@ -352,24 +376,30 @@ static void rna_def_curvemap(BlenderRNA *brna)
 	srna = RNA_def_struct(brna, "CurveMap", NULL);
 	RNA_def_struct_ui_text(srna, "CurveMap", "Curve in a curve mapping");
 
-	/* not editable for now, need to have CurveMapping to do curvemapping_changed */
-
 	prop = RNA_def_property(srna, "extend", PROP_ENUM, PROP_NONE);
 	RNA_def_property_enum_bitflag_sdna(prop, NULL, "flag");
 	RNA_def_property_enum_items(prop, prop_extend_items);
-	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
 	RNA_def_property_ui_text(prop, "Extend", "Extrapolate the curve or extend it horizontally");
 
 	prop = RNA_def_property(srna, "points", PROP_COLLECTION, PROP_NONE);
 	RNA_def_property_collection_sdna(prop, NULL, "curve", "totpoint");
 	RNA_def_property_struct_type(prop, "CurveMapPoint");
 	RNA_def_property_ui_text(prop, "Points", "");
+	rna_def_curvemap_points_api(brna, prop);
+
+	func = RNA_def_function(srna, "evaluate", "curvemap_evaluateF");
+	RNA_def_function_ui_description(func, "Evaluate curve at given location");
+	parm = RNA_def_float(func, "position", 0.0f, -FLT_MAX, FLT_MAX, "Position", "Position to evaluate curve at", -FLT_MAX, FLT_MAX);
+	RNA_def_property_flag(parm, PROP_REQUIRED);
+	parm = RNA_def_float(func, "value", 0.0f, -FLT_MAX, FLT_MAX, "Value", "Value of curve at given location", -FLT_MAX, FLT_MAX);
+	RNA_def_function_return(func, parm);
 }
 
 static void rna_def_curvemapping(BlenderRNA *brna)
 {
 	StructRNA *srna;
 	PropertyRNA *prop;
+	FunctionRNA *func;
 
 	srna = RNA_def_struct(brna, "CurveMapping", NULL);
 	RNA_def_struct_ui_text(srna, "CurveMapping",
@@ -423,6 +453,9 @@ static void rna_def_curvemapping(BlenderRNA *brna)
 	RNA_def_property_range(prop, -1000.0f, 1000.0f);
 	RNA_def_property_ui_text(prop, "White Level", "For RGB curves, the color that white is mapped to");
 	RNA_def_property_float_funcs(prop, NULL, "rna_CurveMapping_white_level_set", NULL);
+
+	func = RNA_def_function(srna, "update", "curvemapping_changed_all");
+	RNA_def_function_ui_description(func, "Update curve mapping after making changes");
 }
 
 static void rna_def_color_ramp_element(BlenderRNA *brna)