/// <summary>
/// Searches the PATH environment and common SDK path environment variables for the glslangvalidator
/// </summary>
public static string Locate(SPIRVExtensionPackage package)
{
if (package.OptionGlslangValidatorBinaryPath != "")
{
OutputWindow.Add("Using glslangvalidator from options path: " + Path.Combine(package.OptionGlslangValidatorBinaryPath, "glslangvalidator.exe"));
return(Path.Combine(package.OptionGlslangValidatorBinaryPath, "glslangvalidator.exe"));
}
var pathEnv = Environment.GetEnvironmentVariable("PATH");
List <string> paths = new List <string>(pathEnv.Split(';'));
var additionalPaths = new[] { "VK_SDK_PATH", "VULKAN_SDK" };
foreach (string path in additionalPaths)
{
if (Environment.GetEnvironmentVariable(path) != null)
{
paths.Add(Environment.GetEnvironmentVariable(path));
}
}
foreach (var path in paths)
{
var filePath = Path.Combine(path, "glslangvalidator.exe");
if (File.Exists(filePath))
{
return(filePath);
}
}
return(null);
}
private static bool Run(string fileName, string commandLine, out List <string> validatorOutput, SPIRVExtensionPackage package)
{
var startInfo = new ProcessStartInfo();
startInfo.FileName = Locate(package);
startInfo.Arguments = commandLine;
startInfo.UseShellExecute = false;
startInfo.RedirectStandardOutput = true;
startInfo.CreateNoWindow = true;
var process = new Process();
process.StartInfo = startInfo;
try
{
process.Start();
}
catch (Exception e)
{
//todo: Display error message
OutputWindow.Add("Exception while running: " + e.Message);
throw;
}
OutputWindow.Add(Locate(package));
OutputWindow.Add(commandLine);
List <string> output = new List <string>();
while (!process.StandardOutput.EndOfStream)
{
output.Add(process.StandardOutput.ReadLine());
}
validatorOutput = output;
return(process.ExitCode == 0);
}
/// <summary>
/// Converts the shader to human readable SPIR-V and returns the reference compiler output
/// </summary>
public static bool GetHumanReadableSPIRV(string fileName, out List <string> validatorOutput, SPIRVExtensionPackage package)
{
string commandLine = string.Format(CultureInfo.CurrentCulture, "-H \"{0}\"", fileName);
if (package.OptionTargetEnv != "")
{
commandLine += " --target-env " + package.OptionTargetEnv;
}
return(Run(fileName, commandLine, out validatorOutput, package));
}
/// <summary>
/// Compile the shader using OpenGL semantics and output to a binary file (.spv)
/// </summary>
public static bool CompileToOpenGL(string fileName, out List <string> validatorOutput, SPIRVExtensionPackage package)
{
string commandLine = string.Format(CultureInfo.CurrentCulture, "-G \"{0}\" -o \"{1}\"", fileName, fileName + ".spv");
return(Run(fileName, commandLine, out validatorOutput, package));
}
/// <summary>
/// Compile the shader using Vulkan semantics and output to a binary file (.spv)
/// </summary>
public static bool CompileToVulkan(string fileName, out List <string> validatorOutput, SPIRVExtensionPackage package)
{
string commandLine = string.Format(CultureInfo.CurrentCulture, "-V \"{0}\" -o \"{1}\"", fileName, fileName + ".spv");
if (package.OptionTargetEnv != "")
{
commandLine += " --target-env " + package.OptionTargetEnv;
}
else
{
// Ray tracing shaders require at least SPIR-V 1.4
if (Utils.IsRayTracingShaderFile(fileName))
{
commandLine += " --target-env spirv1.4";
}
}
return(Run(fileName, commandLine, out validatorOutput, package));
}
/// <summary>
/// Compile the shader using Vulkan semantics and output to a binary file (.spv)
/// </summary>
public static bool CompileToVulkan(string fileName, out List <string> validatorOutput, SPIRVExtensionPackage package)
{
// Get profile and additional options based on file extension
var profileDictionary = new Dictionary <string, string>
{
{ ".vert", "vs_6_1" },
{ ".frag", "ps_6_1" },
{ ".comp", "cs_6_1" },
{ ".geom", "gs_6_1" },
{ ".tesc", "hs_6_1" },
{ ".tese", "ds_6_1" },
{ ".rgen", "lib_6_3" },
{ ".rchit", "lib_6_3" },
{ ".rmiss", "lib_6_3" },
};
string fileExt = Path.GetExtension(fileName).ToLower();
if (!profileDictionary.ContainsKey(fileExt))
{
// @todo: add message
List <string> output = new List <string>();
output.Add("Could not match file extension to HLSL shader profile");
validatorOutput = output;
return(false);
}
string profile = profileDictionary[fileExt];
List <string> commandLineArgs = new List <string>();
commandLineArgs.Add("-spirv");
commandLineArgs.Add("-T " + profile);
commandLineArgs.Add("-E main");
if (package.OptionTargetEnv != "")
{
commandLineArgs.Add("-fspv-target-env=" + package.OptionTargetEnv);
}
else
{
// Ray tracing shaders require at least SPIR-V 1.4
if (Utils.IsRayTracingShaderFile(fileName))
{
commandLineArgs.Add("-fspv-target-env=vulkan1.2");
}
}
commandLineArgs.Add(fileName);
commandLineArgs.Add("-Fo");
commandLineArgs.Add(fileName + ".spv");
string commandLine = string.Join(" ", commandLineArgs);
return(Run(fileName, commandLine, out validatorOutput, package));
}