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, 216 insertions, 0 deletions

diff --git a/source/blender/nodes/intern/CMP_nodes/CMP_chromaMatte.c b/source/blender/nodes/intern/CMP_nodes/CMP_chromaMatte.c
new file mode 100644
index 00000000000..662c62a9a59
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+++ b/source/blender/nodes/intern/CMP_nodes/CMP_chromaMatte.c
@@ -0,0 +1,216 @@
+/**
+ * $Id$
+ *
+ * ***** 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"
+
+/* ******************* Chroma Key ********************************************************** */
+static bNodeSocketType cmp_node_chroma_in[]={
+	{SOCK_RGBA,1,"Image", 0.8f, 0.8f, 0.8f, 1.0f, 0.0f, 1.0f},
+	{SOCK_RGBA,1,"Key Color", 0.8f, 0.8f, 0.8f, 1.0f, 0.0f, 1.0f},
+	{-1,0,""}
+};
+
+static bNodeSocketType cmp_node_chroma_out[]={
+	{SOCK_RGBA,0,"Image", 0.8f, 0.8f, 0.8f, 1.0f, 0.0f, 1.0f},
+	{SOCK_VALUE,0,"Matte",0.0f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f},
+	{-1,0,""}
+};
+
+static void do_rgba_to_ycca_normalized(bNode *node, float *out, float *in)
+{
+	/*normalize to the range -1.0 to 1.0) */
+	rgb_to_ycc(in[0],in[1],in[2], &out[0], &out[1], &out[2]);
+	out[0]=((out[0])-16)/255.0;
+	out[1]=((out[1])-128)/255.0;
+	out[2]=((out[2])-128)/255.0;
+	out[3]=in[3];
+}
+
+static void do_ycca_to_rgba_normalized(bNode *node, float *out, float *in)
+{
+	/*un-normalize the normalize from above */
+	in[0]=(in[0]*255.0)+16;
+	in[1]=(in[1]*255.0)+128;
+	in[2]=(in[2]*255.0)+128;
+	ycc_to_rgb(in[0],in[1],in[2], &out[0], &out[1], &out[2]);
+	out[3]=in[3];
+}
+
+static void do_chroma_key(bNode *node, float *out, float *in)
+{
+	NodeChroma *c;
+	float x, z, alpha;
+	float theta, beta, angle;
+	float kfg, newY, newCb, newCr;
+
+	c=node->storage;
+
+	/* Algorithm from book "Video Demistified" */
+
+	/* find theta, the angle that the color space should be rotated based on key*/
+	theta=atan2(c->key[2],c->key[1]);
+
+	/*rotate the cb and cr into x/z space */
+	x=in[1]*cos(theta)+in[2]*sin(theta);
+	z=in[2]*cos(theta)-in[1]*sin(theta);
+
+	/*if within the acceptance angle */
+	angle=c->t1*M_PI/180.0; /* convert to radians */
+	
+	/* if kfg is <0 then the pixel is outside of the key color */
+	kfg=x-(fabs(z)/tan(angle/2.0));
+
+	if(kfg>0.0) {  /* found a pixel that is within key color */
+
+		newY=in[0]-(1-c->t3)*kfg;
+		newCb=in[1]-kfg*cosf(theta);
+		newCr=in[2]-kfg*sinf(theta);
+		alpha=(kfg+c->fsize)*(c->fstrength);
+
+		beta=atan2(newCr,newCb);
+		beta=beta*180.0/M_PI; /* convert to degrees for compare*/
+
+		/* if beta is within the clippin angle */
+		if(fabs(beta)<(c->t2/2.0)) {
+			newCb=0.0;
+			newCr=0.0;
+			alpha=0.0;
+		}
+
+		out[0]=newY;
+		out[1]=newCb;
+		out[2]=newCr;
+
+		/* don't make something that was more transparent less transparent */
+		if (alpha<in[3]) {
+			out[3]=alpha;
+		}
+		else {
+			out[3]=in[3];
+		}
+	}
+	else { /*pixel is outside key color */
+		out[0]=in[0];
+		out[1]=in[1];
+		out[2]=in[2];
+		out[3]=in[3]; /* make pixel just as transparent as it was before */
+	}
+}
+
+static void node_composit_exec_chroma_matte(void *data, bNode *node, bNodeStack **in, bNodeStack **out)
+{
+	CompBuf *cbuf;
+	CompBuf *chromabuf;
+	NodeChroma *c;
+	
+	if(in[0]->hasinput==0) return;
+	if(in[0]->data==NULL) return;
+	if(out[0]->hasoutput==0 && out[1]->hasoutput==0) return;
+	
+	cbuf= typecheck_compbuf(in[0]->data, CB_RGBA);
+	
+	chromabuf= dupalloc_compbuf(cbuf);
+	
+	c=node->storage;
+	
+	/*convert rgbbuf to normalized chroma space*/
+	composit1_pixel_processor(node, chromabuf, cbuf, in[0]->vec, do_rgba_to_ycca_normalized, CB_RGBA);
+	/*convert key to normalized chroma color space */
+	do_rgba_to_ycca_normalized(node, c->key, in[1]->vec);
+	
+	/*per pixel chroma key*/
+	composit1_pixel_processor(node, chromabuf, chromabuf, in[0]->vec, do_chroma_key, CB_RGBA);
+	
+	/*convert back*/
+	composit1_pixel_processor(node, chromabuf, chromabuf, in[0]->vec, do_ycca_to_rgba_normalized, CB_RGBA);
+	
+	out[0]->data= chromabuf;
+	if(out[1]->hasoutput)
+		out[1]->data= valbuf_from_rgbabuf(chromabuf, CHAN_A);
+	
+	generate_preview(node, chromabuf);
+
+	if(cbuf!=in[0]->data)
+		free_compbuf(cbuf);
+};
+
+static int node_composit_buts_chroma_matte(uiBlock *block, bNodeTree *ntree, bNode *node, rctf *butr)
+{
+   if(block) {
+      short dx=(butr->xmax-butr->xmin)/2;
+      NodeChroma *c= node->storage;
+      uiBlockBeginAlign(block);
+
+      uiDefButF(block, NUMSLI, B_NODE_EXEC+node->nr, "Acceptance ",
+         butr->xmin, butr->ymin+60, butr->xmax-butr->xmin, 20,
+         &c->t1, 1.0f, 80.0f, 100, 0, "Tolerance for colors to be considered a keying color");
+      uiDefButF(block, NUMSLI, B_NODE_EXEC+node->nr, "Cutoff ",
+         butr->xmin, butr->ymin+40, butr->xmax-butr->xmin, 20,
+         &c->t2, 0.0f, 30.0f, 100, 0, "Colors below this will be considered as exact matches for keying color");
+
+      uiDefButF(block, NUMSLI, B_NODE_EXEC+node->nr, "Lift ",
+         butr->xmin, butr->ymin+20, dx, 20,
+         &c->fsize, 0.0f, 1.0f, 100, 0, "Alpha Lift");
+      uiDefButF(block, NUMSLI, B_NODE_EXEC+node->nr, "Gain ",
+         butr->xmin+dx, butr->ymin+20, dx, 20,
+         &c->fstrength, 0.0f, 1.0f, 100, 0, "Alpha Gain");
+
+      uiDefButF(block, NUMSLI, B_NODE_EXEC+node->nr, "Shadow Adjust ",
+         butr->xmin, butr->ymin, butr->xmax-butr->xmin, 20,
+         &c->t3, 0.0f, 1.0f, 100, 0, "Adjusts the brightness of any shadows captured");
+
+      if(c->t2 > c->t1)
+         c->t2=c->t1;
+   }
+   return 80;
+}
+
+static void node_composit_init_chroma_matte(bNode *node)
+{
+   NodeChroma *c= MEM_callocN(sizeof(NodeChroma), "node chroma");
+   node->storage= c;
+   c->t1= 30.0f;
+   c->t2= 10.0f;
+   c->t3= 0.0f;
+   c->fsize= 0.0f;
+   c->fstrength= 1.0f;
+};
+
+bNodeType cmp_node_chroma={
+   /* type code   */       CMP_NODE_CHROMA,
+   /* name        */       "Chroma Key",
+   /* width+range */       200, 80, 300,
+   /* class+opts  */       NODE_CLASS_MATTE, NODE_PREVIEW|NODE_OPTIONS,
+   /* input sock  */       cmp_node_chroma_in,
+   /* output sock */       cmp_node_chroma_out,
+   /* storage     */       "NodeChroma",
+   /* execfunc    */       node_composit_exec_chroma_matte,
+   /* butfunc     */       node_composit_buts_chroma_matte,
+                           node_composit_init_chroma_matte
+};
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