Cycles: Adding native support for UINT16 textures.

Textures in 16 bit integer format are sometimes used for displacement, bump and normal maps and can be exported by tools like Substance Painter. Without this patch, Cycles would promote those textures to single precision floating point, causing them to take up twice as much memory as needed.

Reviewers: #cycles, brecht, sergey

Reviewed By: #cycles, brecht, sergey

Subscribers: sergey, dingto, #cycles

Tags: #cycles

Differential Revision: https://developer.blender.org/D3523

1 files changed, 12 insertions, 0 deletions

diff --git a/intern/cycles/device/device_memory.h b/intern/cycles/device/device_memory.h
index 1138964f18c..b6f3c2913a5 100644
--- a/intern/cycles/device/device_memory.h
+++ b/intern/cycles/device/device_memory.h
@@ -43,6 +43,7 @@ enum MemoryType {
 enum DataType {
 	TYPE_UNKNOWN,
 	TYPE_UCHAR,
+	TYPE_UINT16,
 	TYPE_UINT,
 	TYPE_INT,
 	TYPE_FLOAT,
@@ -57,6 +58,7 @@ static inline size_t datatype_size(DataType datatype)
 		case TYPE_UCHAR: return sizeof(uchar);
 		case TYPE_FLOAT: return sizeof(float);
 		case TYPE_UINT: return sizeof(uint);
+		case TYPE_UINT16: return sizeof(uint16_t);
 		case TYPE_INT: return sizeof(int);
 		case TYPE_HALF: return sizeof(half);
 		case TYPE_UINT64: return sizeof(uint64_t);
@@ -156,6 +158,16 @@ template<> struct device_type_traits<half> {
 	static const int num_elements = 1;
 };
 
+template<> struct device_type_traits<ushort4> {
+	static const DataType data_type = TYPE_UINT16;
+	static const int num_elements = 4;
+};
+
+template<> struct device_type_traits<uint16_t> {
+	static const DataType data_type = TYPE_UINT16;
+	static const int num_elements = 1;
+};
+
 template<> struct device_type_traits<half4> {
 	static const DataType data_type = TYPE_HALF;
 	static const int num_elements = 4;