public static void GenerateHardwareBuiltIns(FrontEndTranslator translator, ShaderInterfaceSet interfaceSet, StorageClass storageClass, ShaderBlock declarationBlock, ShaderBlock decorationsBlock)
{
foreach (var builtInInterfaceField in interfaceSet)
{
var pointerType = translator.FindOrCreatePointerType(builtInInterfaceField.ShaderField.mType, storageClass);
var fieldInstanceOp = translator.CreateOp(OpInstructionType.OpVariable, pointerType, null);
declarationBlock.mLocalVariables.Add(fieldInstanceOp);
Decorations.AddDecorationBuiltIn(translator, fieldInstanceOp, builtInInterfaceField.BuiltInType, decorationsBlock);
ShaderInterfaceField.InstanceAccessDelegate fieldInstanceGetFunction = (FrontEndTranslator translator, ShaderInterfaceField interfaceField, FrontEndContext context) =>
{
return(fieldInstanceOp);
};
builtInInterfaceField.GetInstance = fieldInstanceGetFunction;
}
}
public static void AddDecorationLocations(FrontEndTranslator translator, ShaderType shaderType, ShaderInterfaceSet interfaceSet, LocationCallback locationCallback, ShaderBlock decorationsBlock)
{
int GetNextLocation(Dictionary <int, ShaderInterfaceField> usedLocations, int currLocation)
{
while (usedLocations.ContainsKey(currLocation))
{
++currLocation;
}
return(currLocation);
};
var usedLocations = new Dictionary <int, ShaderInterfaceField>();
List <(ShaderInterfaceField Field, ShaderOp FieldOp)> unknownLocationFields = new List <(ShaderInterfaceField Field, ShaderOp FieldOp)>();
foreach (var field in interfaceSet)
{
var fieldOp = interfaceSet.GetFieldInstance(translator, field, null);
int location = -1;
int component = -1;
locationCallback(field.ShaderField, out location, out component);
if (location != -1)
{
Decorations.AddDecorationLocation(translator, fieldOp, location, decorationsBlock);
usedLocations.Add(location, field);
if (component != -1)
{
Decorations.AddDecorationComponent(translator, fieldOp, location, decorationsBlock);
}
}
else
{
unknownLocationFields.Add((field, fieldOp));
}
}
var nextLocation = 0;
foreach (var pair in unknownLocationFields)
{
nextLocation = GetNextLocation(usedLocations, nextLocation);
Decorations.AddDecorationLocation(translator, pair.FieldOp, nextLocation, decorationsBlock);
usedLocations.Add(nextLocation, pair.Field);
}
}