private static string CompileExternal(string shaderCode, string shaderContentType)
{
var options = OptionsPagePackage.Options;
//create temp shader file for external compiler
var shaderFileName = Path.Combine(Path.GetTempPath(), $"shader{ShaderContentTypes.DefaultFileExtension(shaderContentType)}");
try
{
File.WriteAllText(shaderFileName, shaderCode);
using (var process = new Process())
{
process.StartInfo.FileName = options.ExternalCompilerExeFilePath;
process.StartInfo.Arguments = $"{options.ExternalCompilerArguments} {shaderFileName}"; //arguments
process.StartInfo.UseShellExecute = false;
process.StartInfo.RedirectStandardOutput = true;
process.StartInfo.WindowStyle = ProcessWindowStyle.Hidden;
process.StartInfo.CreateNoWindow = true; //do not display a windows
OutMessage.PaneAndBar($"Using external compiler '{Path.GetFileNameWithoutExtension(options.ExternalCompilerExeFilePath)}' with arguments '{options.ExternalCompilerArguments}' on temporal shader file '{shaderFileName}'");
process.Start();
process.WaitForExit(10000);
var output = process.StandardOutput.ReadToEnd(); //The output result
return(output.Replace(shaderFileName, string.Empty)); //HACK: glslLangValidator produces inconsistent error message format when using vulkan vs glsl compilation
}
}
catch (Exception e)
{
var message = "Error executing external compiler with message\n" + e.ToString();
OutMessage.PaneAndBar(message);
return(string.Empty);
}
}
private static string CompileOnGPU(string shaderCode, string shaderType)
{
// detect shader type
if (!mappingContentTypeToShaderType.TryGetValue(shaderType, out ShaderType glShaderType))
{
OutMessage.PaneAndBar($"Unsupported shader type '{shaderType}' by OpenTK shader compiler. Use an external compiler");
}
try
{
var id = GL.CreateShader(glShaderType);
if (0 == id)
{
throw new Exception($"Could not create {shaderType} instance.");
}
GL.ShaderSource(id, shaderCode);
GL.CompileShader(id);
GL.GetShader(id, ShaderParameter.CompileStatus, out int status_code);
string log = string.Empty;
if (1 != status_code)
{
log = GL.GetShaderInfoLog(id);
}
GL.DeleteShader(id);
return(log);
}
#pragma warning disable CA1031 // Do not catch general exception types
catch (AccessViolationException)
{
return($"(1 1):ERROR: OpenGL shader compiler has crashed");
}
#pragma warning restore CA1031 // Do not catch general exception types
}
private void TaskGlAction()
{
//create a game window for rendering context, until run is called it is invisible so no problem
var context = new GameWindow(1, 1);
while (!compileRequests.IsAddingCompleted)
{
var compileData = compileRequests.Take(); //block until compile requested
var expandedCode = ExpandedCode(compileData.ShaderCode, compileData.DocumentDir);
var log = Compile(expandedCode, compileData.ShaderType);
var errorLog = new ShaderLogParser(log);
if (!string.IsNullOrWhiteSpace(log) && OptionsPagePackage.Options.PrintCompilationResult)
{
OutMessage.OutputWindowPane(log);
}
compileData.CompilationFinished?.Invoke(errorLog.Lines);
}
}
private static string CompileOnGPU(string shaderCode, string shaderType)
{
// detect shader type
if (!mappingContentTypeToShaderType.TryGetValue(shaderType, out ShaderType glShaderType))
{
OutMessage.PaneAndBar($"Unsupported shader type '{shaderType}' by OpenTK shader compiler. Use an external compiler");
}
try
{
using (var shader = new ShaderGL(glShaderType))
{
shader.Compile(shaderCode);
return(shader.Log);
}
}
catch (AccessViolationException)
{
return($"(1 1):ERROR: OpenGL shader compiler has crashed");
}
}
private static string Compile(string shaderCode, string shaderContentType)
{
if (ShaderContentTypes.AutoDetect == shaderContentType)
{
shaderContentType = AutoDetectShaderContentType(shaderCode);
OutMessage.PaneAndBar($"{DateTime.Now.ToString("HH.mm.ss.fff")} Auto detecting shader type to '{shaderContentType}'");
}
var externalCompiler = OptionsPagePackage.Options.ExternalCompilerExeFilePath;
if (File.Exists(externalCompiler))
{
return(CompileExternal(shaderCode, shaderContentType));
}
else
{
if (!string.IsNullOrWhiteSpace(externalCompiler))
{
OutMessage.PaneAndBar($"External compiler '{externalCompiler}' not found using GPU");
}
return(CompileOnGPU(shaderCode, shaderContentType));
}
}