Cycles: Add support for uchar4 attributes.

* Added support for uchar4 attributes to Cycles' attribute system.
* This is used for Vertex Colors now, which saves some memory (4 unsigned characters, instead of 4 floats).
* GPU Texture Limit on sm_20 and sm_21 decreased from 95 to 94, because we need a new texture for the uchar4 attributes. This is no problem for sm_30 or newer.

Part of my GSoC 2014.

1 files changed, 2 insertions, 0 deletions

diff --git a/intern/cycles/render/attribute.h b/intern/cycles/render/attribute.h
index 9fc32db8444..f5227ebde52 100644
--- a/intern/cycles/render/attribute.h
+++ b/intern/cycles/render/attribute.h
@@ -68,6 +68,7 @@ public:
 	float3 *data_float3() { return (float3*)data(); }
 	float4 *data_float4() { return (float4*)data(); }
 	float *data_float() { return (float*)data(); }
+	uchar4 *data_uchar4() { return (uchar4*)data(); }
 	Transform *data_transform() { return (Transform*)data(); }
 	VoxelAttribute *data_voxel()  { return ( VoxelAttribute*)data(); }
 
@@ -80,6 +81,7 @@ public:
 
 	void add(const float& f);
 	void add(const float3& f);
+	void add(const uchar4& f);
 	void add(const Transform& f);
 	void add(const VoxelAttribute& f);
 	void add(const char *data);