make some changes to opengl api gen, discussing on rewrite of all opengl binding, making it neat and structral
This commit is contained in:
Youmu Liu
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//-----------------------------------------------------------------------
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// -----------------------------------------------------------------------
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// file="UniformOverloadEmitter"
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// Project: StgSharp
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// Copyright (c) Nitload.
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// SPDX-License-Identifier: MIT
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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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using System.Text.RegularExpressions;
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#pragma warning disable CA1305
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namespace GenerateGL.CodeGen
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{
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internal static partial class UniformOverloadEmitter
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{
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public static bool IsValueCommand(
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GlCommand command
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)
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{
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return ValueCommandRegex().IsMatch(command.Name);
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}
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public static bool IsSetterCommand(
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GlCommand command
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)
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{
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return IsValueCommand(command) || MatrixCommandRegex().IsMatch(command.Name);
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}
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public static void Write(
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string outputRoot,
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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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List<GlCommand> valueCommands = commands.Where(IsValueCommand)
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.OrderBy(c => c.Name, StringComparer.Ordinal)
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.ToList();
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List<GlCommand> matrixConvenienceCommands = commands
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.Where(c => Matrix4FloatCommandRegex().IsMatch(c.Name))
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.OrderBy(c => c.Name, StringComparer.Ordinal)
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.ToList();
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if (valueCommands.Count == 0 && matrixConvenienceCommands.Count == 0) {
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return;
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}
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StringBuilder sb = new();
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sb.AppendLine("// <auto-generated>");
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sb.AppendLine($"// Generated by StgSharp.GenerateGL on {DateTime.UtcNow.ToString("u", CultureInfo.InvariantCulture)}");
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sb.AppendLine($"// Uniform overloads introduced in OpenGL {version}");
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sb.AppendLine("// </auto-generated>");
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sb.AppendLine("using System;");
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sb.AppendLine("using System.Runtime.CompilerServices;");
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sb.AppendLine("using StgSharp.Mathematics.Graphics;");
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sb.AppendLine();
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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 command in valueCommands) {
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EmitValueOverload(sb, command);
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}
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foreach (GlCommand command in valueCommands.Where(IsFloatVectorCommand)) {
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EmitVectorConvenienceOverload(sb, command);
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}
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foreach (GlCommand command in matrixConvenienceCommands) {
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EmitMatrixConvenienceOverload(sb, command);
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}
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sb.AppendLine(" }");
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sb.AppendLine("}");
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string fileName = Path.Combine(
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outputRoot,
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$"OpenGLFunction.Uniform.v{version.Replace('.', '_')}.g.cs");
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File.WriteAllText(fileName, sb.ToString(), Encoding.UTF8);
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}
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private static void EmitValueOverload(
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StringBuilder sb,
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GlCommand command
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)
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{
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Match match = ValueCommandRegex().Match(command.Name);
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bool hasProgram = match.Groups[1].Success;
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int dimension = int.Parse(match.Groups[2].Value, CultureInfo.InvariantCulture);
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string scalarType = MapScalarType(match.Groups[3].Value);
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bool isVector = match.Groups[4].Success;
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string uniformType = $"Uniform<{string.Join(", ", Enumerable.Repeat(scalarType, dimension))}>";
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sb.AppendLine(" [MethodImpl(MethodImplOptions.AggressiveInlining)]");
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if (isVector)
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{
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string programParameter = hasProgram ? "GlHandle program, " : string.Empty;
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sb.AppendLine($" public void SetUniformValue({programParameter}{uniformType} uniform, ReadOnlySpan<{scalarType}> values)");
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sb.AppendLine(" {");
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sb.AppendLine(" ArgumentNullException.ThrowIfNull(uniform);");
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if (dimension > 1)
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{
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sb.AppendLine($" if ((values.Length % {dimension}) != 0) {{");
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sb.AppendLine($" throw new ArgumentException(\"Uniform data length must be divisible by {dimension}.\", nameof(values));");
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sb.AppendLine(" }");
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}
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sb.AppendLine($" fixed ({scalarType}* valuesPtr = values) {{");
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string count = dimension == 1 ? "values.Length" : $"values.Length / {dimension}";
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sb.AppendLine($" Context.{command.Name}({BuildPrefixArguments(hasProgram)}{count}, valuesPtr);");
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sb.AppendLine(" }");
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sb.AppendLine(" }");
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} else
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{
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string programParameter = hasProgram ? "GlHandle program, " : string.Empty;
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string values = string.Join(", ", Enumerable.Range(0, dimension)
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.Select(i => $"{scalarType} v{i}"));
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string valueArguments = string.Join(", ", Enumerable.Range(0, dimension)
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.Select(i => $"v{i}"));
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sb.AppendLine($" public void SetUniformValue({programParameter}{uniformType} uniform, {values})");
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sb.AppendLine(" {");
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sb.AppendLine(" ArgumentNullException.ThrowIfNull(uniform);");
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sb.AppendLine($" Context.{command.Name}({BuildPrefixArguments(hasProgram)}{valueArguments});");
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sb.AppendLine(" }");
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}
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sb.AppendLine();
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}
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private static void EmitVectorConvenienceOverload(
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StringBuilder sb,
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GlCommand command
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)
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{
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Match match = ValueCommandRegex().Match(command.Name);
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bool hasProgram = match.Groups[1].Success;
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int dimension = int.Parse(match.Groups[2].Value, CultureInfo.InvariantCulture);
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if (dimension < 2) {
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return;
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}
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string vectorType = $"Vec{dimension}";
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string programParameter = hasProgram ? "GlHandle program, " : string.Empty;
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sb.AppendLine(" [MethodImpl(MethodImplOptions.AggressiveInlining)]");
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sb.AppendLine($" public void SetUniformValue({programParameter}Uniform<{vectorType}> uniform, {vectorType} value)");
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sb.AppendLine(" {");
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sb.AppendLine(" ArgumentNullException.ThrowIfNull(uniform);");
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sb.AppendLine($" Context.{command.Name}({BuildPrefixArguments(hasProgram)}1, (float*)&value);");
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sb.AppendLine(" }");
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sb.AppendLine();
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}
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private static void EmitMatrixConvenienceOverload(
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StringBuilder sb,
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GlCommand command
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)
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{
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bool hasProgram = command.Name.StartsWith("glProgram", StringComparison.Ordinal);
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string programParameter = hasProgram ? "GlHandle program, " : string.Empty;
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sb.AppendLine(" [MethodImpl(MethodImplOptions.AggressiveInlining)]");
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sb.AppendLine($" public void SetUniformValue({programParameter}Uniform<GraphicsMatrix> uniform, GraphicsMatrix value, bool transpose = false)");
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sb.AppendLine(" {");
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sb.AppendLine(" ArgumentNullException.ThrowIfNull(uniform);");
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sb.AppendLine($" Context.{command.Name}({BuildPrefixArguments(hasProgram)}1, transpose ? (byte)1 : (byte)0, (float*)&value);");
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sb.AppendLine(" }");
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sb.AppendLine();
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}
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private static string BuildPrefixArguments(
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bool hasProgram
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)
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{
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return hasProgram
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? "program.Value, uniform.id.SignedValue, "
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: "uniform.id.SignedValue, ";
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}
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private static bool IsFloatVectorCommand(
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GlCommand command
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)
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{
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Match match = ValueCommandRegex().Match(command.Name);
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return match.Success && match.Groups[3].Value == "f" && match.Groups[4].Success;
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}
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private static string MapScalarType(
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string suffix
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)
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{
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return suffix switch
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{
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"f" => "float",
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"d" => "double",
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"i" => "int",
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"ui" => "uint",
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_ => throw new InvalidOperationException($"Unsupported uniform suffix: {suffix}")
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};
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}
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[GeneratedRegex("^gl(Program)?Uniform([1-4])(ui|[fdi])(v)?$",
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RegexOptions.CultureInvariant)]
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private static partial Regex ValueCommandRegex();
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[GeneratedRegex("^gl(?:Program)?UniformMatrix4fv$", RegexOptions.CultureInvariant)]
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private static partial Regex Matrix4FloatCommandRegex();
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[GeneratedRegex("^gl(?:Program)?UniformMatrix[234](?:x[234])?[fd]v$",
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RegexOptions.CultureInvariant)]
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private static partial Regex MatrixCommandRegex();
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}
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}
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#pragma warning restore CA1305
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