*

LifeGraphics/render/IConstantMapping.cpp

@@ -0,0 +1,45 @@
+#include "render/IConstantMapping.h"
+
+IConstantMapping::IConstantMapping()
+	:lastSlotId(0)
+{
+}
+IConstantMapping::~IConstantMapping()
+{
+}
+uint32 IConstantMapping::GetAlignedSize()
+{
+	return (lastSlotId + 1) * HLSL_CONSTANT_SIZE * (mapping.size() > 0 ? 1 : 0);
+}
+void IConstantMapping::InsertConstant(const String& name, uint32 numRows, uint32 numCols)
+{
+	if(!numRows || !numCols) return;
+
+	if(numRows == 1)
+	{
+		//try to insert variable in @white spaces@
+		if(spaces.size() > 0)
+		{
+			for(ConstantCollectionItr it = spaces.begin(); it != spaces.end(); ++it)
+			{
+				if((*it).ColumnCount <= numCols) //found suitable white space! Fill it ^^
+				{
+					mapping.push_back(IConstantMappingData((*it).SlotID, (*it).SlotOffset, 1, numCols));
+					(*it).SlotOffset += numCols;
+					(*it).ColumnCount -= numCols;
+					if((*it).ColumnCount <= 0)
+						spaces.erase(it);
+					return;
+				}
+			}
+		}
+		mapping.push_back(IConstantMappingData(lastSlotId++, 0, 1, numCols));
+		if(numCols < 4)
+			spaces.push_back(IConstantMappingData(lastSlotId, numCols, 1, 4 - numCols));
+	}
+	else
+	{
+		mapping.push_back(IConstantMappingData(lastSlotId, 0, numRows, numCols));
+		lastSlotId+=numRows;
+	}
+}