Initial commit. Not in build system so shouldn't interfere with anything at this point. Will commit modified versions of existing files once build system is tested.

1 files changed, 133 insertions, 0 deletions

diff --git a/source/blender/nodes/intern/CMP_nodes/CMP_alphaOver.c b/source/blender/nodes/intern/CMP_nodes/CMP_alphaOver.c
new file mode 100644
index 00000000000..5bf193b604c
--- /dev/null
+++ b/source/blender/nodes/intern/CMP_nodes/CMP_alphaOver.c
@@ -0,0 +1,133 @@
+/**
+ * $Id$
+ *
+ * ***** 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"
+
+/* **************** ALPHAOVER ******************** */
+static bNodeSocketType cmp_node_alphaover_in[]= {
+	{	SOCK_VALUE, 1, "Fac",			1.0f, 0.0f, 1.0f, 1.0f, 0.0f, 1.0f},
+	{	SOCK_RGBA, 1, "Image",			0.8f, 0.8f, 0.8f, 1.0f, 0.0f, 1.0f},
+	{	SOCK_RGBA, 1, "Image",			0.8f, 0.8f, 0.8f, 1.0f, 0.0f, 1.0f},
+	{	-1, 0, ""	}
+};
+static bNodeSocketType cmp_node_alphaover_out[]= {
+	{	SOCK_RGBA, 0, "Image",			0.0f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f},
+	{	-1, 0, ""	}
+};
+
+static void do_alphaover_premul(bNode *node, float *out, float *src, float *over, float *fac)
+{
+	
+	if(over[3]<=0.0f) {
+		QUATCOPY(out, src);
+	}
+	else if(*fac==1.0f && over[3]>=1.0f) {
+		QUATCOPY(out, over);
+	}
+	else {
+		float mul= 1.0f - *fac*over[3];
+
+		out[0]= (mul*src[0]) + *fac*over[0];
+		out[1]= (mul*src[1]) + *fac*over[1];
+		out[2]= (mul*src[2]) + *fac*over[2];
+		out[3]= (mul*src[3]) + *fac*over[3];
+	}	
+}
+
+/* result will be still premul, but the over part is premulled */
+static void do_alphaover_key(bNode *node, float *out, float *src, float *over, float *fac)
+{
+	
+	if(over[3]<=0.0f) {
+		QUATCOPY(out, src);
+	}
+	else if(*fac==1.0f && over[3]>=1.0f) {
+		QUATCOPY(out, over);
+	}
+	else {
+		float premul= fac[0]*over[3];
+		float mul= 1.0f - premul;
+
+		out[0]= (mul*src[0]) + premul*over[0];
+		out[1]= (mul*src[1]) + premul*over[1];
+		out[2]= (mul*src[2]) + premul*over[2];
+		out[3]= (mul*src[3]) + fac[0]*over[3];
+	}
+}
+
+
+static void node_composit_exec_alphaover(void *data, bNode *node, bNodeStack **in, bNodeStack **out)
+{
+	/* stack order in: col col */
+	/* stack order out: col */
+	if(out[0]->hasoutput==0) 
+		return;
+	
+	/* input no image? then only color operation */
+	if(in[1]->data==NULL) {
+		do_alphaover_premul(node, out[0]->vec, in[1]->vec, in[2]->vec, in[0]->vec);
+	}
+	else {
+		/* make output size of input image */
+		CompBuf *cbuf= in[1]->data;
+		CompBuf *stackbuf= alloc_compbuf(cbuf->x, cbuf->y, CB_RGBA, 1); /* allocs */
+		
+		if(node->custom1)
+			composit3_pixel_processor(node, stackbuf, in[1]->data, in[1]->vec, in[2]->data, in[2]->vec, in[0]->data, in[0]->vec, do_alphaover_key, CB_RGBA, CB_RGBA, CB_VAL);
+		else
+			composit3_pixel_processor(node, stackbuf, in[1]->data, in[1]->vec, in[2]->data, in[2]->vec, in[0]->data, in[0]->vec, do_alphaover_premul, CB_RGBA, CB_RGBA, CB_VAL);
+		
+		out[0]->data= stackbuf;
+	}
+}
+
+static int node_composit_buts_alphaover(uiBlock *block, bNodeTree *ntree, bNode *node, rctf *butr)
+{
+   if(block) {
+
+      /* alpha type */
+      uiDefButS(block, TOG, B_NODE_EXEC+node->nr, "ConvertPremul",
+         butr->xmin, butr->ymin, butr->xmax-butr->xmin, 19, 
+         &node->custom1, 0, 0, 0, 0, "");
+   }
+   return 19;
+}
+
+bNodeType cmp_node_alphaover= {
+	/* type code   */	CMP_NODE_ALPHAOVER,
+	/* name        */	"AlphaOver",
+	/* width+range */	80, 40, 120,
+	/* class+opts  */	NODE_CLASS_OP_COLOR, NODE_OPTIONS,
+	/* input sock  */	cmp_node_alphaover_in,
+	/* output sock */	cmp_node_alphaover_out,
+	/* storage     */	"",
+	/* execfunc    */	node_composit_exec_alphaover,
+   /* butfunc     */ node_composit_buts_alphaover
+	
+};
\ No newline at end of file