1 files changed, 80 insertions, 0 deletions
diff --git a/source/blender/compositor/operations/COM_ColorMatteOperation.cpp b/source/blender/compositor/operations/COM_ColorMatteOperation.cpp
new file mode 100644
index 00000000000..a80788ddd33
--- /dev/null
+++ b/source/blender/compositor/operations/COM_ColorMatteOperation.cpp
@@ -0,0 +1,80 @@
+/*
+ * Copyright 2011, Blender Foundation.
+ *
+ * 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.
+ *
+ * Contributor:
+ *		Dalai Felinto
+ */
+
+#include "COM_ColorMatteOperation.h"
+#include "BLI_math.h"
+
+ColorMatteOperation::ColorMatteOperation(): NodeOperation() {
+	addInputSocket(COM_DT_COLOR);
+	addInputSocket(COM_DT_COLOR);
+	addOutputSocket(COM_DT_VALUE);
+
+	inputImageProgram = NULL;
+	inputKeyProgram = NULL;
+}
+
+void ColorMatteOperation::initExecution() {
+	this->inputImageProgram = this->getInputSocketReader(0);
+	this->inputKeyProgram = this->getInputSocketReader(1);
+}
+
+void ColorMatteOperation::deinitExecution() {
+	this->inputImageProgram= NULL;
+	this->inputKeyProgram= NULL;
+}
+
+void ColorMatteOperation::executePixel(float* outputValue, float x, float y, PixelSampler sampler, MemoryBuffer *inputBuffers[]) {
+	float inColor[4];
+	float inKey[4];
+
+	const float hue=this->settings->t1;
+	const float sat=this->settings->t2;
+	const float val=this->settings->t3;
+
+	float h_wrap;
+
+	this->inputImageProgram->read(inColor, x, y, sampler, inputBuffers);
+	this->inputKeyProgram->read(inKey, x, y, sampler, inputBuffers);
+
+
+	/* store matte(alpha) value in [0] to go with
+	 * COM_SetAlphaOperation and the Value output
+	 */
+
+	if(
+	/* do hue last because it needs to wrap, and does some more checks  */
+
+	/* sat */	(fabsf(inColor[1]-inKey[1]) < sat) &&
+	/* val */	(fabsf(inColor[2]-inKey[2]) < val) &&
+
+	/* multiply by 2 because it wraps on both sides of the hue,
+	 * otherwise 0.5 would key all hue's */
+
+	/* hue */	((h_wrap= 2.f * fabsf(inColor[0]-inKey[0])) < hue || (2.f - h_wrap) < hue)
+	) {
+		outputValue[0]=0.f; /*make transparent*/
+	}
+
+	else { /*pixel is outside key color */
+		outputValue[0]=inColor[3]; /* make pixel just as transparent as it was before */
+	}
+}
+