private static string ExpandedCode(string shaderCode, string shaderFileDir)
{
string SpecialCommentReplacement(string code, string specialComment)
{
var lines = code.Split(new[] { '\n' }, StringSplitOptions.None); //if UNIX style line endings still working so do not use Envirnoment.NewLine
for (int i = 0; i < lines.Length; ++i)
{
var index = lines[i].IndexOf(specialComment); // search for special comment
if (-1 != index)
{
lines[i] = lines[i].Substring(index + specialComment.Length); // remove everything before special comment
}
}
return(string.Join("\n", lines));
}
string GetIncludeCode(string includeName)
{
var includeFileName = Path.Combine(shaderFileDir, includeName);
if (File.Exists(includeFileName))
{
var includeCode = File.ReadAllText(includeFileName);
includeCode = SpecialCommentReplacement(includeCode, "//!");
return(includeCode);
}
return($"#error include file '{includeName}' not found");
}
shaderCode = SpecialCommentReplacement(shaderCode, "//!");
shaderCode = SpecialCommentReplacement(shaderCode, "//?");
return(Transformations.ExpandIncludes(shaderCode, GetIncludeCode));
}
private static void Update(ShaderProgramGL shaderProgram, IEnumerable <NamedStream> namedStreams, bool solutionMode, IContentLoader contentLoader)
{
string ShaderCode(Stream stream)
{
using (var reader = new StreamReader(stream, true))
{
var code = reader.ReadToEnd();
if (solutionMode)
{
code = code.Replace("#ifdef SOLUTION", "#if 1");
}
return(code);
}
}
var count = namedStreams.Count();
if (2 > count)
{
return;
}
foreach (var res in namedStreams)
{
var shaderType = GetShaderTypeFromExtension(Path.GetExtension(res.Name));
var shaderCode = ShaderCode(res.Stream);
string GetIncludeCode(string includeName)
{
var resourceName = includeName.Replace(Path.DirectorySeparatorChar, '.');
resourceName = resourceName.Replace(Path.AltDirectorySeparatorChar, '.');
var includeCode = contentLoader.Load <StringBuilder>(resourceName).ToString();
using (var includeShader = new ShaderGL(shaderType))
{
if (!includeShader.Compile(includeCode))
{
var e = includeShader.CreateException(includeCode);
throw new NamedShaderException(contentLoader.Names.GetFullName(includeName), e);
}
}
return(includeCode);
}
var expandedShaderCode = Transformations.ExpandIncludes(shaderCode, GetIncludeCode);
var shader = new ShaderGL(shaderType);
if (shader.Compile(expandedShaderCode))
{
shaderProgram.Attach(shader);
}
else
{
shaderProgram.RemoveShaders(); //clean out whole shader program to avoid double attachments next time
var e = shader.CreateException(shaderCode);
shader.Dispose();
throw new NamedShaderException(res.Name, e);
}
}
if (!shaderProgram.Link())
{
var e = new ShaderLinkException(shaderProgram.Log);
var s = new StringBuilder();
foreach (var ns in namedStreams)
{
s.Append(ns.Name);
s.Append(';');
}
throw new NamedShaderException(s.ToString(), e);
}
}