/// <summary>
/// Get a compilation context based on the macros
/// </summary>
/// <param name="mixinToAnalyze">List of mixin to analyze</param>
/// <param name="log">The log.</param>
/// <returns>the correct compilation context</returns>
private ShaderCompilationContext GetCompilationContext(IEnumerable<ModuleMixinInfo> mixinToAnalyze, LoggerResult log)
{
var mixinInfos = new HashSet<ModuleMixinInfo>();
foreach (var mixin in mixinToAnalyze)
mixinInfos.UnionWith(mixin.MinimalContext);
var context = new ShaderCompilationContext(log);
context.Preprocess(mixinInfos);
return context;
}
/// <summary>
/// create the context for each composition by cloning their dependencies
/// </summary>
/// <param name="shaderSource">the entry ShaderSource (root)</param>
/// <param name="dictionary">the ouputed compositions</param>
/// <param name="compilationContext">the compilation context</param>
/// <param name="cloneContext">The clone context.</param>
/// <returns>a list of all the needed mixins</returns>
private static List<ModuleMixin> BuildCompositionsDictionary(ShaderSource shaderSource, CompositionDictionary dictionary, ShaderCompilationContext compilationContext, CloneContext cloneContext, LoggerResult log)
{
if (shaderSource is ShaderMixinSource)
{
var shaderMixinSource = shaderSource as ShaderMixinSource;
var finalModule = compilationContext.GetModuleMixinFromShaderSource(shaderSource);
//PerformanceLogger.Start(PerformanceStage.DeepClone);
finalModule = finalModule.DeepClone(new CloneContext(cloneContext));
//PerformanceLogger.Pause(PerformanceStage.DeepClone);
foreach (var composition in shaderMixinSource.Compositions)
{
//look for the key
var foundVars = finalModule.FindAllVariablesByName(composition.Key).Where(value => value.Variable.Qualifiers.Contains(XenkoStorageQualifier.Compose)).ToList();
if (foundVars.Count > 1)
{
log.Error(XenkoMessageCode.ErrorAmbiguousComposition, new SourceSpan(), composition.Key);
}
else if (foundVars.Count > 0)
{
Variable foundVar = foundVars[0].Variable;
var moduleMixins = BuildCompositionsDictionary(composition.Value, dictionary, compilationContext, cloneContext, log);
if (moduleMixins == null)
return null;
dictionary.Add(foundVar, moduleMixins);
}
else
{
// No matching variable was found
// TODO: log a message?
}
}
return new List<ModuleMixin> { finalModule };
}
if (shaderSource is ShaderClassSource)
{
var finalModule = compilationContext.GetModuleMixinFromShaderSource(shaderSource);
//PerformanceLogger.Start(PerformanceStage.DeepClone);
finalModule = finalModule.DeepClone(new CloneContext(cloneContext));
//PerformanceLogger.Pause(PerformanceStage.DeepClone);
return new List<ModuleMixin> { finalModule };
}
if (shaderSource is ShaderArraySource)
{
var shaderArraySource = shaderSource as ShaderArraySource;
var compositionArray = new List<ModuleMixin>();
foreach (var shader in shaderArraySource.Values)
{
var mixin = BuildCompositionsDictionary(shader, dictionary, compilationContext, cloneContext, log);
if (mixin == null)
return null;
compositionArray.AddRange(mixin);
}
return compositionArray;
}
return null;
}