private static string GetShaderName(ShaderGeneratorDescriptor generatorDesc, FractalTypeDescriptor fractalDesc)
{
string shaderStr = string.Format("{0}/{1}{2}", generatorDesc.shaderCategory,
generatorDesc.name,
fractalDesc.name);
return(shaderStr);
}
/// <summary>
/// Forces the generation of any shaders that make use of generated noise header files. Gathers all
/// the NoiseShaderGenerators and generates shaders based on the ".noisehlsltemplate" file
/// provided by that particular NoiseShaderGenerator implementation
/// </summary>
public static void GenerateShaders()
{
System.Globalization.CultureInfo prevCultureInfo = System.Threading.Thread.CurrentThread.CurrentCulture;
System.Threading.Thread.CurrentThread.CurrentCulture = System.Globalization.CultureInfo.InvariantCulture;
GatherGenerators();
IFractalType[] fractalTypes = s_fractalTypes;
INoiseType[] noiseTypes = s_noiseTypes;
Dictionary <Type, INoiseShaderGenerator> generators = s_generators;
StringBuilder shaderSB = new StringBuilder();
StringBuilder passesSB = new StringBuilder();
foreach (KeyValuePair <Type, INoiseShaderGenerator> pair in generators)
{
shaderSB.Clear();
passesSB.Clear();
string shaderTemplateStr = null;
INoiseShaderGenerator generator = pair.Value;
ShaderGeneratorDescriptor generatorDesc = generator.GetDescription();
if (!File.Exists(generatorDesc.templatePath))
{
Debug.LogError("Could not find specified template file for noise shader generator: " + generator);
continue;
}
// load contents of shader template
using (StreamReader sr = new StreamReader(generatorDesc.templatePath))
{
shaderTemplateStr = sr.ReadToEnd();
}
// find the pass template using regex matching
Match passTemplateMatch = Regex.Match(shaderTemplateStr, Strings.k_regexPassTemplate1);
if (!passTemplateMatch.Success)
{
Debug.LogError($"Could not find pass template in {generatorDesc.templatePath}. Skipping noise shader generation for this generator type!!");
continue;
}
string passTemplateStr = passTemplateMatch.Value;
// generate shaders for each fractal type
foreach (IFractalType fractal in fractalTypes)
{
FractalTypeDescriptor fractalDesc = fractal.GetDescription();
string fullShaderCategory = GetShaderName(generatorDesc, fractalDesc);
shaderSB.Append(NoiseLib.Strings.k_warningHeader);
shaderSB.Append(shaderTemplateStr);
shaderSB.Replace(NoiseLib.Strings.k_tagShaderCategory, $"\"{fullShaderCategory}\"");
// add passes for each noise type
foreach (INoiseType noise in noiseTypes)
{
GeneratedShaderInfo info = new GeneratedShaderInfo(fractal, noise);
// add to passes string builer
passesSB.Append(passTemplateStr);
passesSB.AppendLine();
passesSB.Replace(NoiseLib.Strings.k_tagIncludes, string.Format("#include \"{0}\"", info.generatedIncludePath));
info.ReplaceTags(passesSB);
}
// replace template with generated passes
string newContents = Regex.Replace(shaderSB.ToString(), Strings.k_regexPassTemplate2, passesSB.ToString());
newContents = newContents.Replace(NoiseLib.Strings.k_tagFractalName, fractalDesc.name);
// load shader contents from disk if it exists
string fileName = string.Format("{0}{1}.shader", generatorDesc.name, fractalDesc.name);
string filePath = string.Format("{0}/{1}", generatorDesc.outputDir, fileName);
if (!Directory.Exists(generatorDesc.outputDir))
{
Directory.CreateDirectory(generatorDesc.outputDir);
}
string currentContents = null;
FileInfo fi = new FileInfo(filePath);
if (File.Exists(filePath))
{
using (StreamReader sr = new StreamReader(filePath))
{
currentContents = sr.ReadToEnd();
currentContents = NormalizeLineEndings(currentContents);
}
}
// do some code cleanup
newContents = Regex.Replace(newContents, NoiseLib.Strings.k_regexDupCommas, ", ");
newContents = Regex.Replace(newContents, NoiseLib.Strings.k_emptyArgsRight, " )");
newContents = Regex.Replace(newContents, NoiseLib.Strings.k_emptyArgsLeft, "( ");
newContents = NormalizeLineEndings(newContents);
// only write to file if it is not read-only, ie. if it is one of the generated
// shader files that we ship with the TerrainTools package
if (!fi.IsReadOnly)
{
if (currentContents == null || currentContents.CompareTo(newContents) != 0)
{
try
{
using (StreamWriter sw = new StreamWriter(filePath))
{
sw.Write(newContents);
}
}
catch (Exception)
{
// restore previous cultureinfo
System.Threading.Thread.CurrentThread.CurrentCulture = prevCultureInfo;
}
}
}
shaderSB.Clear();
passesSB.Clear();
}
}
// restore previous cultureinfo
System.Threading.Thread.CurrentThread.CurrentCulture = prevCultureInfo;
UnityEditor.AssetDatabase.Refresh();
}