public static GLParser FromFile(string xmlFile, params string[] Api)
{
XDocument file = XDocument.Load(xmlFile);
GLParser spec = new GLParser();
spec.HeaderComment = file.Root.Element("comment").Value;
foreach (var feature in file.Root.Elements("feature"))
{
var apiName = feature.Attribute("api").Value;
if (Api.Contains(apiName))
{
var version = new GLVersion
{
Api = feature.Attribute("api").Value.ToUpper(),
Number = feature.Attribute("number").Value,
};
version.Name = version.Api + version.Number.Replace(".", "");
// Add all enums and commands from previus versions
int i = spec.Versions.Count - 1;
if (i >= 0)
{
var previousVersion = spec.Versions[i];
foreach (var g in previousVersion.Groups)
{
version.Groups.Add(g.Clone());
}
foreach (var c in previousVersion.Commands)
{
version.Commands.Add(c.Clone());
}
}
// Include all new enums and commands
foreach (var require in feature.Elements("require"))
{
foreach (var enumElem in require.Elements("enum"))
{
var enumName = enumElem.Attribute("name").Value;
// if enum doesn't exists
bool exists = version.Groups.Exists(g => g.Enums.Exists(e => e.Name == enumName));
if (!exists)
{
// Find group
string groupFound = FindGroupInXML(file, enumName);
// The group already exists
GlGroup glgroup = version.Groups.Find(g => g.Name == groupFound);
if (glgroup == null)
{
glgroup = new GlGroup()
{
Name = groupFound
};
version.Groups.Add(glgroup);
}
// Create new Enum
var glEnum = new GLEnum();
glEnum.Initialize(file, enumName);
glgroup.Enums.Add(glEnum);
}
}
foreach (var commandElem in require.Elements("command"))
{
var glCommand = new GLCommand()
{
Name = commandElem.Attribute("name").Value
};
if (version.Commands.Find(c => c.Name == glCommand.Name) == null)
{
// Create new command
glCommand.Initialize(commandElem.Document);
version.Commands.Add(glCommand);
}
}
}
// Add enum from commands
foreach (var commandElem in version.Commands)
{
// Return Type
if (commandElem.ReturnType.Type == "GLenum")
{
var selectedGroup = commandElem.ReturnType.Group;
bool groupExists = version.Groups.Exists(g => g.Name == selectedGroup);
if (!groupExists)
{
foreach (var group in file.Root.Element("groups").Elements("group"))
{
string groupName = group.Attribute("name").Value;
if (groupName == selectedGroup)
{
GlGroup glgroup = new GlGroup()
{
Name = selectedGroup
};
foreach (var e in group.Elements("enum"))
{
GLEnum glEnum = new GLEnum();
var enumName = e.Attribute("name").Value;
glEnum.Initialize(file, enumName);
glgroup.Enums.Add(glEnum);
}
version.Groups.Add(glgroup);
}
}
}
}
// Parameters
foreach (var param in commandElem.Parameters)
{
if (param.Type == "GLenum")
{
bool groupExists = version.Groups.Exists(g => g.Name == param.Group);
if (!groupExists)
{
foreach (var group in file.Root.Element("groups").Elements("group"))
{
string groupName = group.Attribute("name").Value;
if (groupName == param.Group)
{
GlGroup glgroup = new GlGroup()
{
Name = param.Group
};
foreach (var e in group.Elements("enum"))
{
GLEnum glEnum = new GLEnum();
var enumName = e.Attribute("name").Value;
glEnum.Initialize(file, enumName);
glgroup.Enums.Add(glEnum);
}
version.Groups.Add(glgroup);
}
}
}
}
}
}
// Remove any anums and commands
foreach (var remove in feature.Elements("remove"))
{
foreach (var e in remove.Elements("enum"))
{
foreach (var group in version.Groups)
{
var glenum = group.Enums.Find(n => n.Name == e.Attribute("name").Value);
if (glenum != null)
{
group.Enums.Remove(glenum);
}
}
}
foreach (var c in remove.Elements("command"))
{
version.Commands.RemoveAll(command => command.Name == c.Attribute("name").Value);
}
}
// Remove all group with 0 enums
version.Groups.RemoveAll(g => g.Enums.Count == 0);
// Remove GLBoolean type
version.Groups.RemoveAll(g => g.Name == "Boolean");
spec.Versions.Add(version);
}
}
return(spec);
}
private static void GenerateBindings(string glFile, DirectoryInfo workingDirectory, string[] api, string namespaceText, string nativeClassText)
{
var spec = GLParser.FromFile(glFile, api);
// Select version
var version = spec.Versions[spec.Versions.Count - 1];
// Write Enums
using (var writer = new StreamWriter((Path.Combine(workingDirectory.FullName, "Enums.cs"))))
{
writer.WriteLine("using System;\n");
writer.WriteLine(namespaceText);
writer.WriteLine("{");
int count = 0;
foreach (var groupElem in version.Groups)
{
// Separate one line betweens enums
if (count++ > 0)
{
writer.WriteLine();
}
writer.WriteLine($"\tpublic enum {groupElem.Name} : uint");
writer.WriteLine("\t{");
foreach (var enumElem in groupElem.Enums)
{
if (IsUint(enumElem.Value))
{
writer.WriteLine($"\t\t{enumElem.ShortName} = {enumElem.Value},");
}
}
writer.WriteLine("\t}");
}
writer.WriteLine("}");
}
// Write Commands
using (var writer = new StreamWriter((Path.Combine(workingDirectory.FullName, $"{nativeClassText}.cs"))))
{
writer.WriteLine("using System;");
writer.WriteLine("using System.Runtime.InteropServices;\n");
writer.WriteLine(namespaceText);
writer.WriteLine("{");
writer.WriteLine($"\tpublic static unsafe class {nativeClassText}");
writer.WriteLine("\t{");
writer.WriteLine("\t\tprivate static Func<string, IntPtr> s_getProcAddress;\n");
writer.WriteLine("\t\tprivate const CallingConvention CallConv = CallingConvention.Winapi;");
// Prototypes
foreach (var command in version.Commands)
{
writer.WriteLine("\n\t\t[UnmanagedFunctionPointer(CallConv)]");
// Delegate
StringBuilder delegateCommand = new StringBuilder("\t\tprivate delegate ");
BuildReturnType(version, command, delegateCommand);
delegateCommand.Append($" {command.Name}_t(");
BuildParameterList(version, command, delegateCommand);
delegateCommand.Append(");");
writer.WriteLine(delegateCommand.ToString());
// internal function
writer.WriteLine($"\t\tprivate static {command.Name}_t p_{command.Name};");
// public function
StringBuilder function = new StringBuilder($"\t\tpublic static ");
BuildReturnType(version, command, function);
function.Append($" {command.Name}(");
BuildParameterList(version, command, function);
function.Append($") => p_{command.Name}(");
BuildParameterNamesList(command, function);
function.Append(");");
writer.WriteLine(function.ToString());
}
// Helper functions
writer.WriteLine("\n\t\tpublic static void LoadGetString(Func<string, IntPtr> getProcAddress)");
writer.WriteLine("\t\t{");
writer.WriteLine("\t\t\ts_getProcAddress = getProcAddress;");
writer.WriteLine("\t\t\tLoadFunction(\"glGetString\", out p_glGetString);");
writer.WriteLine("\t\t}");
writer.WriteLine("\n\t\tpublic static void LoadAllFunctions(Func<string, IntPtr> getProcAddress)");
writer.WriteLine("\t\t{");
writer.WriteLine("\t\t\ts_getProcAddress = getProcAddress;\n");
foreach (var command in version.Commands)
{
writer.WriteLine($"\t\t\tLoadFunction(\"{command.Name}\", out p_{command.Name});");
}
writer.WriteLine("\t\t}\n");
writer.WriteLine("\t\tprivate static void LoadFunction<T>(string name, out T field)");
writer.WriteLine("\t\t{");
writer.WriteLine("\t\t\tIntPtr funcPtr = s_getProcAddress(name);");
writer.WriteLine("\t\t\tif (funcPtr != IntPtr.Zero)");
writer.WriteLine("\t\t\t{");
writer.WriteLine("\t\t\t\tfield = Marshal.GetDelegateForFunctionPointer<T>(funcPtr);");
writer.WriteLine("\t\t\t}");
writer.WriteLine("\t\t\telse");
writer.WriteLine("\t\t\t{");
writer.WriteLine("\t\t\t\tfield = default(T);");
writer.WriteLine("\t\t\t}");
writer.WriteLine("\t\t}");
writer.WriteLine("\t}");
writer.WriteLine("}");
}
}