glInstanceID implementation

src/Renderer/Renderer.cpp

@@ -424,6 +424,11 @@ namespace sw
 					memcpy(&data->vs.b, VertexProcessor::b, sizeof(bool) * draw->vsDirtyConstB);
 					draw->vsDirtyConstB = 0;
 				}
+
+				if(context->vertexShader->instanceIdDeclared)
+				{
+					data->instanceID = context->instanceID;
+				}
 			}
 			else
 			{

src/Shader/VertexProgram.cpp

@@ -665,6 +665,9 @@ namespace sw
 				reg = r.o[i + relativeAddress(r, src)];
 			}
 			break;
+		case Shader::PARAMETER_MISCTYPE:
+			reg.x = Float(r.instanceID);
+			return reg;
 		default:
 			ASSERT(false);
 		}

src/Shader/VertexRoutine.cpp

@@ -52,6 +52,10 @@ namespace sw
 			Registers r(shader);
 			r.data = data;
 			r.constants = *Pointer<Pointer<Byte> >(data + OFFSET(DrawData,constants));
+			if(shader->instanceIdDeclared)
+			{
+				r.instanceID = *Pointer<Int>(data + OFFSET(DrawData, instanceID));
+			}
 
 			Do
 			{

src/Shader/VertexRoutine.hpp

@@ -67,6 +67,8 @@ namespace sw
 			Int4 enableBreak;
 			Int4 enableContinue;
 			Int4 enableLeave;
+
+			Int instanceID;
 		};
 
 	public:

src/Shader/VertexShader.cpp

@@ -41,6 +41,7 @@ namespace sw
 			memcpy(input, vs->input, sizeof(input));
 			positionRegister = vs->positionRegister;
 			pointSizeRegister = vs->pointSizeRegister;
+			instanceIdDeclared = vs->instanceIdDeclared;
 			usedSamplers = vs->usedSamplers;
 
 			optimize();