From 7aa21d677aea676fcedf76f330775f4c38e71f3f Mon Sep 17 00:00:00 2001
From: Brecht Van Lommel <brechtvanlommel@pandora.be>
Date: Tue, 15 May 2012 18:34:00 +0000
Subject: Python/CurveMapping: add Curve Mapping functions to add/remove curve
 points, evaluate the curve and update after changes.

---
 source/blender/blenkernel/intern/colortools.c | 46 ++++++++++++++++++++++++++-
 1 file changed, 45 insertions(+), 1 deletion(-)

(limited to 'source/blender/blenkernel/intern/colortools.c')

diff --git a/source/blender/blenkernel/intern/colortools.c b/source/blender/blenkernel/intern/colortools.c
index 7ba117861bb..d15f678f1c5 100644
--- a/source/blender/blenkernel/intern/colortools.c
+++ b/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)
 {
-- 
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