1 files changed, 127 insertions, 0 deletions

diff --git a/source/blender/compositor/operations/COM_PreviewOperation.cpp b/source/blender/compositor/operations/COM_PreviewOperation.cpp
new file mode 100644
index 00000000000..5191c940f70
--- /dev/null
+++ b/source/blender/compositor/operations/COM_PreviewOperation.cpp
@@ -0,0 +1,127 @@
+/*
+ * 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: 
+ *		Jeroen Bakker 
+ *		Monique Dewanchand
+ */
+
+#include "COM_PreviewOperation.h"
+#include "COM_SocketConnection.h"
+#include "BLI_listbase.h"
+#include "DNA_scene_types.h"
+#include "BKE_image.h"
+#include "WM_api.h"
+#include "WM_types.h"
+#include "PIL_time.h"
+#include "BLI_utildefines.h"
+#include "BLI_math_color.h"
+#include "COM_defines.h"
+#include "BLI_math.h"
+extern "C" {
+	#include "MEM_guardedalloc.h"
+	#include "IMB_imbuf.h"
+	#include "IMB_imbuf_types.h"
+}
+
+
+PreviewOperation::PreviewOperation() : NodeOperation() {
+	this->addInputSocket(COM_DT_COLOR, COM_SC_NO_RESIZE);
+	this->outputBuffer = NULL;
+	this->input = NULL;
+	this->divider = 1.0f;
+	this->node = NULL;
+	this->priority = 0;
+}
+
+void PreviewOperation::initExecution() {
+	this->input = getInputSocketReader(0);
+	if (!this->node->preview) {
+		this->node->preview = (bNodePreview*)MEM_callocN(sizeof(bNodePreview), "node preview");
+	} else {
+		if (this->getWidth() == (unsigned int)this->node->preview->xsize && this->getHeight() == (unsigned int)this->node->preview->ysize) {
+			this->outputBuffer = this->node->preview->rect;
+		}
+	}
+
+	if (this->outputBuffer == NULL) {
+		this->outputBuffer = (unsigned char*)MEM_callocN(sizeof(unsigned char)*4*getWidth()*getHeight(), "PreviewOperation");
+		if(this->node->preview->rect) {
+				MEM_freeN(this->node->preview->rect);
+		}
+		this->node->preview->xsize= getWidth();
+		this->node->preview->ysize= getHeight();
+		this->node->preview->rect= outputBuffer;
+	}
+}
+
+void PreviewOperation::deinitExecution() {
+	this->outputBuffer = NULL;
+	this->input = NULL;
+}
+
+void PreviewOperation::executeRegion(rcti *rect, unsigned int tileNumber, MemoryBuffer **memoryBuffers) {
+	int offset;
+	float color[4];
+	for (int y = rect->ymin ; y < rect->ymax ; y++) {
+		offset = (y * getWidth() + rect->xmin)*4;
+		for (int x = rect->xmin ; x < rect->xmax ; x++) {
+			float rx = floor(x/divider);
+			float ry = floor(y/divider);
+	
+			color[0] = 0.0f;
+			color[1] = 0.0f;
+			color[2] = 0.0f;
+			color[3] = 1.0f;
+			input->read(color, rx, ry, COM_PS_NEAREST, memoryBuffers);
+			/// @todo: linear conversion only when scene color management is selected, also check predivide.
+			linearrgb_to_srgb_v4(color, color);
+			F4TOCHAR4(color, outputBuffer+offset);
+			offset +=4;
+		}
+	}
+}
+bool PreviewOperation::determineDependingAreaOfInterest(rcti *input, ReadBufferOperation *readOperation, rcti *output) {
+	rcti newInput;
+
+	newInput.xmin = input->xmin/divider;
+	newInput.xmax = input->xmax/divider;
+	newInput.ymin = input->ymin/divider;
+	newInput.ymax = input->ymax/divider;
+
+	return NodeOperation::determineDependingAreaOfInterest(&newInput, readOperation, output);
+}
+void PreviewOperation::determineResolution(unsigned int resolution[], unsigned int preferredResolution[]) {
+	NodeOperation::determineResolution(resolution, preferredResolution);
+	int width = resolution[0];
+	int height = resolution[1];
+	this->divider = 0.0f;
+	if (width > height) {
+		divider = COM_PREVIEW_SIZE / (width-1);
+	} else {
+		divider = COM_PREVIEW_SIZE / (height-1);
+	}
+	width = width * divider;
+	height = height * divider;
+	
+	resolution[0] = width;
+	resolution[1] = height;
+}
+
+const int PreviewOperation::getRenderPriority() const {
+	return this->priority;
+}