1 files changed, 108 insertions, 0 deletions
diff --git a/source/blender/compositor/operations/COM_NormalizeOperation.cpp b/source/blender/compositor/operations/COM_NormalizeOperation.cpp
new file mode 100644
index 00000000000..ade2fde8d07
--- /dev/null
+++ b/source/blender/compositor/operations/COM_NormalizeOperation.cpp
@@ -0,0 +1,108 @@
+/*
+ * 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:
+ *		Dalai Felinto
+ */
+
+#include "COM_NormalizeOperation.h"
+
+NormalizeOperation::NormalizeOperation(): NodeOperation() {
+	this->addInputSocket(COM_DT_VALUE);
+	this->addOutputSocket(COM_DT_VALUE);
+	this->imageReader = NULL;
+	this->cachedInstance = NULL;
+	this->setComplex(true);
+}
+void NormalizeOperation::initExecution() {
+	this->imageReader = this->getInputSocketReader(0);
+	NodeOperation::initMutex();
+}
+
+void NormalizeOperation::executePixel(float* color, int x, int y, MemoryBuffer *inputBuffers[], void * data) {
+	/* using generic two floats struct to store x: min  y: mult */
+	NodeTwoFloats *minmult = (NodeTwoFloats *)data;
+
+	float output[4];
+	this->imageReader->read(output, x, y, inputBuffers, NULL);
+
+	color[0] = (output[0] - minmult->x) * minmult->y;
+}
+
+void NormalizeOperation::deinitExecution() {
+	this->imageReader = NULL;
+	if (this->cachedInstance) {
+		delete cachedInstance;
+	}
+	NodeOperation::deinitMutex();
+}
+
+bool NormalizeOperation::determineDependingAreaOfInterest(rcti *input, ReadBufferOperation *readOperation, rcti *output) {
+	rcti imageInput;
+
+	NodeOperation* operation = getInputOperation(0);
+	imageInput.xmax = operation->getWidth();
+	imageInput.xmin = 0;
+	imageInput.ymax = operation->getHeight();
+	imageInput.ymin = 0;
+
+	if (operation->determineDependingAreaOfInterest(&imageInput, readOperation, output) ) {
+		return true;
+	}
+	return false;
+}
+
+/* The code below assumes all data is inside range +- this, and that input buffer is single channel */
+#define BLENDER_ZMAX 10000.0f
+
+void* NormalizeOperation::initializeTileData(rcti *rect, MemoryBuffer **memoryBuffers) {
+
+	BLI_mutex_lock(getMutex());
+
+	if (this->cachedInstance == NULL) {
+		MemoryBuffer* tile = (MemoryBuffer*)imageReader->initializeTileData(rect, memoryBuffers);
+		/* using generic two floats struct to store x: min  y: mult */
+		NodeTwoFloats *minmult = new NodeTwoFloats();
+
+		float *buffer = tile->getBuffer();
+		int p = tile->getWidth() * tile->getHeight();
+		float *bc = buffer;
+
+		float minv = 1.0f+BLENDER_ZMAX;
+		float maxv = -1.0f-BLENDER_ZMAX;
+
+		float value;
+		while (p--) {
+			value=bc[0];
+			maxv = max(value, maxv);
+			minv = min(value, minv);
+			bc+=4;
+		}
+
+		minmult->x = minv;
+		/* The rare case of flat buffer  would cause a divide by 0 */
+		minmult->y = ((maxv!=minv)? 1.0f/(maxv-minv):0.f);
+
+		this->cachedInstance = minmult;
+	}
+
+	BLI_mutex_unlock(getMutex());
+	return this->cachedInstance;
+}
+
+void NormalizeOperation::deinitializeTileData(rcti *rect, MemoryBuffer **memoryBuffers, void *data) {
+}