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using OpenTK.Graphics.OpenGL;
using Ryujinx.Common.Logging;
using System;
namespace Ryujinx.Graphics.Gal.OpenGL
{
static class OglExtension
{
// Private lazy backing variables
private static Lazy<bool> _enhancedLayouts = new Lazy<bool>(() => HasExtension("GL_ARB_enhanced_layouts"));
private static Lazy<bool> _textureMirrorClamp = new Lazy<bool>(() => HasExtension("GL_EXT_texture_mirror_clamp"));
private static Lazy<bool> _viewportArray = new Lazy<bool>(() => HasExtension("GL_ARB_viewport_array"));
private static Lazy<bool> _nvidiaDriver = new Lazy<bool>(() => IsNvidiaDriver());
// Public accessors
public static bool EnhancedLayouts => _enhancedLayouts.Value;
public static bool TextureMirrorClamp => _textureMirrorClamp.Value;
public static bool ViewportArray => _viewportArray.Value;
public static bool NvidiaDriver => _nvidiaDriver.Value;
private static bool HasExtension(string name)
{
int numExtensions = GL.GetInteger(GetPName.NumExtensions);
for (int extension = 0; extension < numExtensions; extension++)
{
if (GL.GetString(StringNameIndexed.Extensions, extension) == name)
{
return true;
}
}
Logger.PrintInfo(LogClass.Gpu, $"OpenGL extension {name} unavailable. You may experience some performance degradation");
return false;
}
private static bool IsNvidiaDriver()
{
return GL.GetString(StringName.Vendor).Equals("NVIDIA Corporation");
}
public static class Required
{
// Public accessors
public static bool EnhancedLayouts => _enhancedLayoutsRequired.Value;
public static bool TextureMirrorClamp => _textureMirrorClampRequired.Value;
public static bool ViewportArray => _viewportArrayRequired.Value;
// Private lazy backing variables
private static Lazy<bool> _enhancedLayoutsRequired = new Lazy<bool>(() => HasExtensionRequired(OglExtension.EnhancedLayouts, "GL_ARB_enhanced_layouts"));
private static Lazy<bool> _textureMirrorClampRequired = new Lazy<bool>(() => HasExtensionRequired(OglExtension.TextureMirrorClamp, "GL_EXT_texture_mirror_clamp"));
private static Lazy<bool> _viewportArrayRequired = new Lazy<bool>(() => HasExtensionRequired(OglExtension.ViewportArray, "GL_ARB_viewport_array"));
private static bool HasExtensionRequired(bool value, string name)
{
if (value)
{
return true;
}
Logger.PrintWarning(LogClass.Gpu, $"Required OpenGL extension {name} unavailable. You may experience some rendering issues");
return false;
}
}
}
}
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