Added an Alpha Convert compositor node, to convert between

premultiplied and key alpha.

1 files changed, 77 insertions, 0 deletions

diff --git a/source/blender/nodes/intern/CMP_nodes/CMP_premulkey.c b/source/blender/nodes/intern/CMP_nodes/CMP_premulkey.c
new file mode 100644
index 00000000000..4fde652c59d
--- /dev/null
+++ b/source/blender/nodes/intern/CMP_nodes/CMP_premulkey.c
@@ -0,0 +1,77 @@
+/**
+* $Id$
+*
+* ***** 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, 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 *****
+
+*/
+
+#include "../CMP_util.h"
+
+/* **************** Premul and Key Alpha Convert ******************** */
+
+static bNodeSocketType cmp_node_premulkey_in[]= {
+	{	SOCK_RGBA, 1, "Image",			0.8f, 0.8f, 0.8f, 1.0f, 0.0f, 1.0f},
+	{	-1, 0, ""	}
+};
+static bNodeSocketType cmp_node_premulkey_out[]= {
+	{	SOCK_RGBA, 0, "Image",			0.0f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f},
+	{	-1, 0, ""	}
+};
+
+static void node_composit_exec_premulkey(void *data, bNode *node, bNodeStack **in, bNodeStack **out)
+{
+	if(out[0]->hasoutput==0)
+		return;
+	
+	if(in[0]->data) {
+		CompBuf *stackbuf, *cbuf= typecheck_compbuf(in[0]->data, CB_RGBA);
+
+		stackbuf= dupalloc_compbuf(cbuf);
+		premul_compbuf(stackbuf, node->custom1 == 1);
+
+		out[0]->data = stackbuf;
+		if(cbuf != in[0]->data)
+			free_compbuf(cbuf);
+	}
+}
+
+bNodeType cmp_node_premulkey= {
+	/* *next,*prev */	NULL, NULL,
+	/* type code   */	CMP_NODE_PREMULKEY,
+	/* name        */	"Alpha Convert",
+	/* width+range */	140, 100, 320,
+	/* class+opts  */	NODE_CLASS_CONVERTOR, NODE_OPTIONS,
+	/* input sock  */	cmp_node_premulkey_in,
+	/* output sock */	cmp_node_premulkey_out,
+	/* storage     */	"",
+	/* execfunc    */	node_composit_exec_premulkey,
+	/* butfunc     */	NULL, 
+	/* initfunc    */	NULL, 
+	/* freestoragefunc	*/ NULL, 
+	/* copysotragefunc	*/ NULL, 
+	/* id          */	NULL
+};
+