Durian request: Added 'Color Balance' node to compositor. uses Lift/Gamma/Gain

similar to sequence editor.

--> http://mke3.net/blender/devel/2.5/color_balance_node.jpg

Also added 0 key (zero key) shortcut when mouse is over a button, to reset it to its default value.
Same as the RMB menu ->Reset to Default, except for color wheels, it only resets the hue/sat/value
components that that widget affects.

Peter/Xavier: The existing color balance code can generate NaNs (fractional power of a negative),
which causes havoc along the image pipeline. I added a check in the node code to prevent this.

Still plenty of potential for lots of better colour correction tools in the compositor, just needs time...

1 files changed, 12 insertions, 0 deletions

diff --git a/source/blender/makesdna/DNA_node_types.h b/source/blender/makesdna/DNA_node_types.h
index 9b433c5bf8c..71b607247d3 100644
--- a/source/blender/makesdna/DNA_node_types.h
+++ b/source/blender/makesdna/DNA_node_types.h
@@ -300,6 +300,18 @@ typedef struct NodeLensDist {
 	short jit, proj, fit, pad;
 } NodeLensDist;
 
+typedef struct NodeColorBalance {
+	/* for processing */
+	float slope[3];
+	float offset[3];
+	float power[3];
+	
+	/* for ui representation */
+	float lift[3];
+	float gamma[3];
+	float gain[3];
+} NodeColorBalance;
+
 /* TEX_output */
 typedef struct TexNodeOutput {
 	char name[32];