D627: Memory usage optimization for the compositor.

The compostor used a fixed size of 4 floats to hold pixel data. this
patch will select size of a pixel based on its type.
It uses 1 float for Value, 3 float for vector and 4 floats for color
data types.

When benchmarking on shots (opening shot of caminandes) we get a
reduction of memory of 30% and a tiny speedup as less data
transformations needs to take place (but these are negligable.

More information of the patch can be found on
https://developer.blender.org/D627 and
http://wiki.blender.org/index.php/Dev:Ref/Proposals/Compositor2014_p1.1_TD

Developers: jbakker & mdewanchand
Thanks for Sergey for his indept review.

1 files changed, 2 insertions, 1 deletions

diff --git a/source/blender/compositor/operations/COM_ReadBufferOperation.h b/source/blender/compositor/operations/COM_ReadBufferOperation.h
index 569920d51ef..7e5bc55a8ca 100644
--- a/source/blender/compositor/operations/COM_ReadBufferOperation.h
+++ b/source/blender/compositor/operations/COM_ReadBufferOperation.h
@@ -25,6 +25,7 @@
 
 #include "COM_NodeOperation.h"
 #include "COM_MemoryProxy.h"
+#include "COM_MemoryBuffer.h"
 
 class ReadBufferOperation : public NodeOperation {
 private:
@@ -33,7 +34,7 @@ private:
 	unsigned int m_offset;
 	MemoryBuffer *m_buffer;
 public:
-	ReadBufferOperation();
+	ReadBufferOperation(DataType datetype);
 	void setMemoryProxy(MemoryProxy *memoryProxy) { this->m_memoryProxy = memoryProxy; }
 	MemoryProxy *getMemoryProxy() { return this->m_memoryProxy; }
 	void determineResolution(unsigned int resolution[2], unsigned int preferredResolution[2]);