Changes to keying nodes:

- Replace FastGaussian blur with GaussianBokeh blur which should give better results.
- Changes a bit formula of saturation which in some cases gives better result.
  Also included (commented out) original formula which was also checked by Brecht
  and which gave better result in some other cases.
- Made clipping white/black temporal dependent, so hopefully it wouldn't destroy
  gradients on edges.

1 files changed, 95 insertions, 0 deletions

diff --git a/source/blender/compositor/operations/COM_KeyingClipOperation.cpp b/source/blender/compositor/operations/COM_KeyingClipOperation.cpp
new file mode 100644
index 00000000000..559d282f613
--- /dev/null
+++ b/source/blender/compositor/operations/COM_KeyingClipOperation.cpp
@@ -0,0 +1,95 @@
+/*
+ * Copyright 2012, 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:
+ *		Jeroen Bakker
+ *		Monique Dewanchand
+ *		Sergey Sharybin
+ */
+
+#include "COM_KeyingClipOperation.h"
+
+#include "MEM_guardedalloc.h"
+
+#include "BLI_listbase.h"
+#include "BLI_math.h"
+
+KeyingClipOperation::KeyingClipOperation(): NodeOperation()
+{
+	this->addInputSocket(COM_DT_VALUE);
+	this->addOutputSocket(COM_DT_VALUE);
+
+	this->clipBlack = 0.0f;
+	this->clipWhite = 1.0f;
+
+	this->pixelReader = NULL;
+}
+
+void KeyingClipOperation::initExecution()
+{
+	this->pixelReader = this->getInputSocketReader(0);
+}
+
+void KeyingClipOperation::deinitExecution()
+{
+	this->pixelReader = NULL;
+}
+
+void KeyingClipOperation::executePixel(float *color, float x, float y, PixelSampler sampler, MemoryBuffer *inputBuffers[])
+{
+	const int delta = 3;
+
+	float pixelColor[4];
+	int width = this->getWidth(), height = this->getHeight();
+	int count_black = 0, count_white = 0;
+	int i, j;
+
+	this->pixelReader->read(pixelColor, x, y, sampler, inputBuffers);
+
+	for (i = -delta + 1; i < delta; i++) {
+		for (j = -delta + 1; j < delta; j++) {
+			int cx = x + j, cy = y + i;
+
+			if (i == 0 && j == 0)
+				continue;
+
+			if (cx >= 0 && cx < width && cy >= 0 && cy < height) {
+				float value[4];
+
+				this->pixelReader->read(value, cx, cy, sampler, inputBuffers);
+
+				if (value[0] < 0.4f)
+					count_black++;
+				else if (value[0] > 0.6f)
+					count_white++;
+			}
+		}
+	}
+
+	color[0] = pixelColor[0];
+
+	if (count_black >= 22 || count_white >= 22) {
+		if (count_black >= 4 || count_white >= 4) {
+			if (color[0] < this->clipBlack)
+				color[0] = 0.0f;
+			else if (color[0] >= this->clipWhite)
+				color[0] = 1.0f;
+			else
+				color[0] = (color[0] - this->clipBlack) / (this->clipWhite - this->clipBlack);
+		}
+	}
+}