Implement R5G6B5 to 4.12 normalization.

src/Shader/SamplerCore.cpp

@@ -106,6 +106,30 @@ namespace sw
 
 			if(fixed12 && !hasFloatTexture())
 			{
+				if(has16bitTextureFormat())
+				{
+					switch(state.textureFormat)
+					{
+					case FORMAT_R5G6B5:
+						if(state.sRGB)
+						{
+							sRGBtoLinear16_5_12(c.x);
+							sRGBtoLinear16_6_12(c.y);
+							sRGBtoLinear16_5_12(c.z);
+						}
+						else
+						{
+							c.x = MulHigh(As<UShort4>(c.x), UShort4(0x10000000 / 0xF800));
+							c.y = MulHigh(As<UShort4>(c.y), UShort4(0x10000000 / 0xFC00));
+							c.z = MulHigh(As<UShort4>(c.z), UShort4(0x10000000 / 0xF800));
+						}
+						break;
+					default:
+						ASSERT(false);
+					}
+				}
+				else
+				{
 					for(int component = 0; component < textureComponentCount(); component++)
 					{
 						if(state.sRGB && isRGBComponent(component))
@@ -125,6 +149,7 @@ namespace sw
 						}
 					}
 				}
+			}
 
 			if(fixed12 && state.textureFilter != FILTER_GATHER)
 			{
@@ -264,6 +289,34 @@ namespace sw
 
 				for(int component = 0; component < textureComponentCount(); component++)
 				{
+					if(has16bitTextureFormat())
+					{
+						switch(state.textureFormat)
+						{
+						case FORMAT_R5G6B5:
+							if(state.sRGB)
+							{
+								sRGBtoLinear16_5_12(cs.x);
+								sRGBtoLinear16_6_12(cs.y);
+								sRGBtoLinear16_5_12(cs.z);
+
+								convertSigned12(c.x, cs.x);
+								convertSigned12(c.y, cs.y);
+								convertSigned12(c.z, cs.z);
+							}
+							else
+							{
+								c.x = Float4(As<UShort4>(cs.x)) * Float4(1.0f / 0xF800);
+								c.y = Float4(As<UShort4>(cs.y)) * Float4(1.0f / 0xFC00);
+								c.z = Float4(As<UShort4>(cs.z)) * Float4(1.0f / 0xF800);
+							}
+							break;
+						default:
+							ASSERT(false);
+						}
+					}
+					else
+					{
 						if(state.sRGB && isRGBComponent(component))
 						{
 							sRGBtoLinear16_8_12(cs[component]);   // FIXME: Perform linearization at surface level for read-only textures
@@ -282,6 +335,7 @@ namespace sw
 						}
 					}
 				}
+			}
 
 			int componentCount = textureComponentCount();