//TODO: More types
// TODO: Do we need this?
/*
* protected void BindFragDataLocation(int colourSlot, string outputName)
* {
* GL.BindFragDataLocation(Handle, colourSlot, outputName);
* }
*/
public void BindVariable(string variableName, Action <int> bindAction)
{
int location;
if (!VariableLocations.TryGetValue(variableName, out location))
{
throw new Exception($"ShaderProgram.BindVariable ({Name}): Variable {variableName} not defined.");
}
bindAction?.Invoke(location);
}
public ShaderProgram AddVariable(int index, string name)
{
if (!string.IsNullOrWhiteSpace(name))
{
if (VariableLocations.ContainsKey(name))
{
VariableLocations[name] = index;
}
else
{
VariableLocations.Add(name, index);
}
}
return(this);
}
public ShaderProgram(ShaderProgram cloneFrom)
{
if (cloneFrom == null)
{
throw new ArgumentNullException(nameof(cloneFrom));
}
if (cloneFrom.ShaderSourceOrFilenames.Count == 0)
{
throw new InvalidOperationException($"ShaderProgram: cannot clone from {cloneFrom.Name} due to insufficient shader information");
}
Name = cloneFrom.Name;
foreach (var v in cloneFrom.VariableLocations)
{
VariableLocations.Add(v.Key, v.Value);
}
foreach (var f in cloneFrom.FragDataLocation)
{
FragDataLocation.Add(f.Key, f.Value);
}
UsingFilenames = cloneFrom.UsingFilenames;
foreach (var s in cloneFrom.ShaderSourceOrFilenames)
{
ShaderSourceOrFilenames.Add(s);
}
if (UsingFilenames)
{
InitFromFiles();
}
else
{
InitFromSource();
}
}
public ShaderProgram SetVariables(params string[] variables)
{
VariableLocations.Clear();
if (variables == null || variables.Length == 0)
{
return(this);
}
// if we've only been passed a single string and it contains commas, then split it.
if (variables.Length == 1 && variables[0].Contains(","))
{
return(SetVariables(variables[0].Split(',')));
}
for (int i = 0; i < variables.Length; i++)
{
AddVariable(i, variables[i]);
}
return(this);
}