adding generated opengl function binding
This commit is contained in:
Youmu Liu
@@ -0,0 +1,270 @@
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//-----------------------------------------------------------------------
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// -----------------------------------------------------------------------
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// file="Generator"
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// Project: StgSharp
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// AuthorGroup: Nitload
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// Copyright (c) Nitload. All rights reserved.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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//
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// -----------------------------------------------------------------------
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// -----------------------------------------------------------------------
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using System;
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using System.Collections.Generic;
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using System.Globalization;
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using System.IO;
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using System.Linq;
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using System.Text;
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namespace GenerateGL.CodeGen
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{
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internal sealed class Generator
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{
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private static readonly string[] SkipPrefixes = {
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"glBegin", "glEnd", "glVertexP", "glVertex2", "glVertex3", "glVertex4", "glTexCoordP", "glTexCoord1", "glTexCoord2", "glTexCoord3", "glTexCoord4", "glColorP", "glColor3", "glColor4", "glNormalP", "glNormal3", "glMultiTexCoordP", "glMultiTexCoord1", "glMultiTexCoord2", "glMultiTexCoord3", "glMultiTexCoord4", "glSecondaryColor", "glFog", "glLight", "glMaterial", "glEval", "glMap1", "glMap2", "glRasterPos", "glBitmap"
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};
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private static readonly string[] TargetVersions = {
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"3.3", "4.0", "4.1", "4.2", "4.3", "4.4", "4.5", "4.6"
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};
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private readonly IReadOnlyDictionary<string, GlCommand> _commands;
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private readonly IReadOnlyList<GlFeature> _features;
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private readonly string _outputRoot;
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public Generator(
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IReadOnlyDictionary<string, GlCommand> commands,
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IReadOnlyList<GlFeature> features,
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string outputRoot
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)
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{
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_commands = commands;
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_features = features;
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_outputRoot = outputRoot;
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}
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public void Run()
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{
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if (Directory.Exists(_outputRoot)) {
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Directory.Delete(_outputRoot, recursive:true);
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}
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Directory.CreateDirectory(_outputRoot);
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List<GlCommand> all = new List<GlCommand>();
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foreach (string v in TargetVersions)
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{
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IReadOnlyList<GlCommand> cmds = CollectCommandsForVersion(v)
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.Where(c => !ShouldSkip(c.Name))
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.ToList();
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all.AddRange(cmds);
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WriteOpenGLFunctionFile(v, cmds);
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WriteGlContextFile(v, cmds);
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}
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WriteMergedGlContextFile(all);
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}
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private IReadOnlyList<GlCommand> CollectCommandsForVersion(
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string version
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)
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{
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IEnumerable<GlCommand?> selected = _features.Where(f => string.Equals(f.Version, version, StringComparison.Ordinal))
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.SelectMany(f => f.RequiresCommands)
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.Distinct(StringComparer.Ordinal)
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.Select(name => _commands.TryGetValue(name, out GlCommand? c) ?
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c :
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null)
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.Where(c => c != null)!;
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return selected.ToList()!;
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}
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private static string DelegateSignature(
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string ret,
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IReadOnlyList<string> paramTypes
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)
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{
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if (paramTypes.Count == 0) {
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return $"delegate*<{ret}>";
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}
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return $"delegate*<{string.Join(", ", paramTypes)}, {ret}>";
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}
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private static string SafeName(
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string name
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)
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{
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return string.IsNullOrWhiteSpace(name) ?
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"arg" :
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name switch
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{
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"params" => "@params",
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"event" => "@event",
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_ => name
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};
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}
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private static bool ShouldSkip(
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string name
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)
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{
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foreach (string prefix in SkipPrefixes)
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{
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if (name.StartsWith(prefix, StringComparison.Ordinal)) {
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return true;
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}
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}
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return false;
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}
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private static string TrimGlPrefix(
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string name
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)
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{
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if (name.StartsWith("gl", StringComparison.Ordinal) && name.Length > 2) {
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return name.Substring(2);
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}
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return name;
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}
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private void WriteGlContextFile(
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string version,
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IReadOnlyList<GlCommand> commands
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)
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{
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StringBuilder sb = new StringBuilder();
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sb.AppendLine("// <auto-generated>");
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sb.AppendLine($"// Generated by StgSharp.GenerateGL on {DateTime.UtcNow.ToString("u", CultureInfo.InvariantCulture)}");
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sb.AppendLine($"// Version: {version}");
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sb.AppendLine("// </auto-generated>");
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sb.AppendLine("using System;\nusing System.Runtime.CompilerServices;\n");
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sb.AppendLine("namespace StgSharp.Graphics.OpenGL");
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sb.AppendLine("{");
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sb.AppendLine(" public unsafe partial struct OpenglContext");
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sb.AppendLine(" {");
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foreach (GlCommand cmd in commands.OrderBy(c => c!.Name, StringComparer.Ordinal))
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{
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string ret = CsTypeMapper.MapDelegateReturn(cmd.ReturnType);
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List<string> paramTypes = new List<string>();
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foreach (GlParam p in cmd.Parameters)
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{
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string mapped = CsTypeMapper.MapDelegateParameter(p);
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paramTypes.Add(mapped);
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}
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string decl = DelegateSignature(ret, paramTypes);
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sb.AppendLine($" internal unsafe {decl} {cmd.Name};");
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}
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sb.AppendLine(" }");
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sb.AppendLine("}");
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string fileName = Path.Combine(_outputRoot, $"glContext.v{version.Replace('.', '_')}.cs");
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File.WriteAllText(fileName, sb.ToString(), Encoding.UTF8);
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}
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private void WriteMergedGlContextFile(
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IReadOnlyList<GlCommand> commands
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)
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{
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List<GlCommand> distinct = commands.Where(c => !ShouldSkip(c.Name))
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.GroupBy(c => c.Name, StringComparer.Ordinal)
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.Select(g => g.First())
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.OrderBy(c => c.Name, StringComparer.Ordinal)
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.ToList();
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StringBuilder sb = new StringBuilder();
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sb.AppendLine("// <auto-generated>");
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sb.AppendLine($"// Generated by StgSharp.GenerateGL on {DateTime.UtcNow.ToString("u", CultureInfo.InvariantCulture)}");
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sb.AppendLine("// Aggregated GL3+ commands");
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sb.AppendLine("// </auto-generated>");
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sb.AppendLine("using System;\nusing System.Runtime.CompilerServices;\n");
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sb.AppendLine("namespace StgSharp.Graphics.OpenGL");
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sb.AppendLine("{");
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sb.AppendLine(" public unsafe partial struct OpenglContext");
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sb.AppendLine(" {");
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foreach (GlCommand cmd in distinct)
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{
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string ret = CsTypeMapper.MapDelegateReturn(cmd.ReturnType);
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List<string> paramTypes = new List<string>();
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foreach (GlParam p in cmd.Parameters)
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{
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string mapped = CsTypeMapper.MapDelegateParameter(p);
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paramTypes.Add(mapped);
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}
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string decl = DelegateSignature(ret, paramTypes);
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sb.AppendLine($" internal unsafe {decl} {cmd.Name};");
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}
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sb.AppendLine(" }");
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sb.AppendLine("}");
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string fileName = Path.Combine(_outputRoot, "glContext.cs");
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File.WriteAllText(fileName, sb.ToString(), Encoding.UTF8);
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}
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private void WriteOpenGLFunctionFile(
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string version,
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IReadOnlyList<GlCommand> commands
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)
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{
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StringBuilder sb = new StringBuilder();
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sb.AppendLine("// <auto-generated>");
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sb.AppendLine($"// Generated by StgSharp.GenerateGL on {DateTime.UtcNow.ToString("u", CultureInfo.InvariantCulture)}");
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sb.AppendLine($"// Version: {version}");
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sb.AppendLine("// </auto-generated>");
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sb.AppendLine("using System;\nusing System.Runtime.CompilerServices;\nusing StgSharp.Graphics.OpenGL;\n");
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sb.AppendLine("namespace StgSharp.Graphics.OpenGL");
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sb.AppendLine("{");
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sb.AppendLine(" public unsafe partial class OpenGLFunction");
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sb.AppendLine(" {");
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foreach (GlCommand cmd in commands.OrderBy(c => c!.Name, StringComparer.Ordinal))
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{
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string ret = CsTypeMapper.MapReturn(cmd.ReturnType);
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string rawName = cmd.Name; // original glXxx
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string methodName = TrimGlPrefix(rawName);
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List<string> paramList = new List<string>();
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List<string> callArgs = new List<string>();
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foreach (GlParam p in cmd.Parameters)
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{
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string mapped = CsTypeMapper.MapParameter(p);
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string pname = SafeName(p.Name);
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paramList.Add($"{mapped} {pname}");
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if (mapped == "GlHandle")
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{
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callArgs.Add($"{pname}.Value");
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} else
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{
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callArgs.Add(pname);
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}
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}
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string signature = string.Join(", ", paramList);
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string call = string.Join(", ", callArgs);
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sb.AppendLine($" [MethodImpl(MethodImplOptions.AggressiveInlining)]");
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sb.AppendLine($" public {ret} {methodName}({signature})");
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sb.AppendLine(" {");
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string prefix = ret == "void" ? string.Empty : "return ";
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sb.AppendLine($" {prefix}Context.{rawName}({call});");
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sb.AppendLine(" }");
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sb.AppendLine();
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}
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sb.AppendLine(" }");
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sb.AppendLine("}");
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string fileName = Path.Combine(_outputRoot, $"glFunction.v{version.Replace('.', '_')}.cs");
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File.WriteAllText(fileName, sb.ToString(), Encoding.UTF8);
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}
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}
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}
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