/// <summary>
/// Replaces the old filters with the new list of filters.
/// </summary>
/// <param name="models">new filter configuration</param>
/// <param name="statisticsPoint">index of the statistics point</param>
/// <param name="context"></param>
/// <param name="changed">This indicates which image equations were changed by the new filter configuration</param>
public void Apply(List <FilterModel> models, int statisticsPoint, OpenGlContext context, bool[] changed)
{
DisposeUnusedFilter(models, filter, context);
filter = models;
Debug.Assert(statisticsPoint >= 0 && statisticsPoint <= filter.Count);
StatisticsPoint = statisticsPoint;
OnChanged(changed);
}
public void Dispose(OpenGlContext context)
{
var disable = context.Enable();
Parameters.Dispose();
Model.Dispose();
if (disable)
{
context.Disable();
}
}
private void HandleTexture(string[] pars, OpenGlContext glContext)
{
if (pars.Length < 2)
{
throw new Exception("not enough arguments for #texture provided");
}
var name = pars[0];
if (!variableRegex.IsMatch(pars[1]))
{
throw new Exception("invalid function name (only alphanumeric characters allowed)");
}
if (TextureParameters.Count + 1 >= glContext.MaxTextureUnits)
{
throw new Exception($"Too many texture bindings. Only {glContext.MaxTextureUnits} texture bindings are available on this GPU");
}
TextureParameters.Add(new FilterTextureParameterModel(name, pars[1]));
}
/// <summary>
/// disposes all filters from old list which are no longer used in new list
/// </summary>
/// <param name="newList"></param>
/// <param name="oldList"></param>
/// <param name="context"></param>
public static void DisposeUnusedFilter(IReadOnlyList <FilterModel> newList, IReadOnlyList <FilterModel> oldList, OpenGlContext context)
{
var disable = context.Enable();
foreach (var old in oldList)
{
// delete if the filter is not used in new list
if (newList.All(newFilter => !ReferenceEquals(newFilter, old)))
{
old.Dispose();
}
}
if (disable)
{
context.Disable();
}
}
public FilterLoader(string filename, OpenGlContext glContext)
{
this.Filename = filename;
Name = filename;
Description = "";
int lineNumber = 1;
// Read the file and display it line by line.
System.IO.StreamReader file =
new System.IO.StreamReader(filename);
try
{
string line;
while ((line = file.ReadLine()) != null)
{
if (line.StartsWith("#paramprop"))
{
HandleParamprop(GetParameters(line.Substring("#paramprop".Length)));
ShaderSource += "\n"; // remember line for error information
}
else if (line.StartsWith("#param"))
{
HandleParam(GetParameters(line.Substring("#param".Length)));
ShaderSource += "\n"; // remember line for error information
}
else if (line.StartsWith("#texture"))
{
HandleTexture(GetParameters(line.Substring("#texture".Length)), glContext);
ShaderSource += "\n"; // remember line for error information
}
else if (line.StartsWith("#setting"))
{
var whole = line.Substring("#setting".Length);
var parameters = GetParameters(whole);
// get the second parameter as one string (without , seperation)
try
{
var idx = whole.IndexOf(",", StringComparison.Ordinal);
whole = whole.Substring(idx + 1);
}
catch (Exception)
{
// no second parameter available
whole = "";
}
whole = whole.TrimStart(' ');
whole = whole.TrimEnd(' ');
HandleSetting(parameters, whole);
ShaderSource += "\n"; // remember line for error information
}
else if (line.StartsWith("#keybinding"))
{
HandleKeybinding(GetParameters(line.Substring("#keybinding".Length)));
ShaderSource += "\n"; // remember line for error information
}
else
{
ShaderSource += line + "\n";
}
++lineNumber;
}
}
catch (Exception e)
{
throw new Exception(e.Message + " at line " + lineNumber);
}
finally
{
file.Close();
}
}
