1 files changed, 90 insertions, 0 deletions
diff --git a/source/blender/nodes/composite/nodes/node_composite_gamma.c b/source/blender/nodes/composite/nodes/node_composite_gamma.c
new file mode 100644
index 00000000000..d191f649f1f
--- /dev/null
+++ b/source/blender/nodes/composite/nodes/node_composite_gamma.c
@@ -0,0 +1,90 @@
+/*
+* $Id: CMP_gamma.c 36593 2011-05-10 11:19:26Z lukastoenne $
+*
+* ***** BEGIN GPL LICENSE BLOCK *****
+*
+* This program is free software; you can redistribute it and/or
+* modify it under the terms of the GNU General Public License
+* as published by the Free Software Foundation; either version 2
+* of the License, or (at your option) any later version. 
+*
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+* GNU General Public License for more details.
+* 
+* You should have received a copy of the GNU General Public License
+* along with this program; if not, write to the Free Software Foundation,
+* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+* 
+* The Original Code is Copyright (C) 2006 Blender Foundation.
+* All rights reserved.
+* 
+* The Original Code is: all of this file.
+* 
+* Contributor(s): none yet.
+* 
+* ***** END GPL LICENSE BLOCK *****
+
+*/
+
+/** \file blender/nodes/composite/nodes/node_composite_gamma.c
+ *  \ingroup cmpnodes
+ */
+
+
+#include "node_composite_util.h"
+
+/* **************** Gamma Tools  ******************** */
+  
+static bNodeSocketTemplate cmp_node_gamma_in[]= {
+	{	SOCK_RGBA, 1, "Image",			0.8f, 0.8f, 0.8f, 1.0f},
+	{	SOCK_FLOAT, 1, "Gamma",			1.0f, 0.0f, 0.0f, 0.0f, 0.001f, 10.0f, PROP_UNSIGNED},
+	{	-1, 0, ""	}
+};
+static bNodeSocketTemplate cmp_node_gamma_out[]= {
+	{	SOCK_RGBA, 0, "Image"},
+	{	-1, 0, ""	}
+};
+
+static void do_gamma(bNode *UNUSED(node), float *out, float *in, float *fac)
+{
+	int i=0;
+	for(i=0; i<3; i++) {
+		/* check for negative to avoid nan's */
+		out[i] = (in[i] > 0.0f)? pow(in[i],fac[0]): in[i];
+	}
+	out[3] = in[3];
+}
+static void node_composit_exec_gamma(void *UNUSED(data), bNode *node, bNodeStack **in, bNodeStack **out)
+{
+	/* stack order in: Fac, Image */
+	/* stack order out: Image */
+	if(out[0]->hasoutput==0) return;
+	
+	/* input no image? then only color operation */
+	if(in[0]->data==NULL) {
+		do_gamma(node, out[0]->vec, in[0]->vec, in[1]->vec);
+	}
+	else {
+		/* make output size of input image */
+		CompBuf *cbuf= in[0]->data;
+		CompBuf *stackbuf= alloc_compbuf(cbuf->x, cbuf->y, CB_RGBA, 1); // allocs
+		
+		composit2_pixel_processor(node, stackbuf, cbuf, in[0]->vec, in[1]->data, in[1]->vec, do_gamma, CB_RGBA, CB_VAL);
+
+		out[0]->data= stackbuf;
+	}
+}
+
+void register_node_type_cmp_gamma(ListBase *lb)
+{
+	static bNodeType ntype;
+	
+	node_type_base(&ntype, CMP_NODE_GAMMA, "Gamma", NODE_CLASS_OP_COLOR, NODE_OPTIONS);
+	node_type_socket_templates(&ntype, cmp_node_gamma_in, cmp_node_gamma_out);
+	node_type_size(&ntype, 140, 100, 320);
+	node_type_exec(&ntype, node_composit_exec_gamma);
+	
+	nodeRegisterType(lb, &ntype);
+}