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using OpenTK.Graphics.OpenGL;
using System;
namespace Ryujinx.Graphics.OpenGL
{
static class HwCapabilities
{
private static readonly Lazy<bool> _supportsAstcCompression = new Lazy<bool>(() => HasExtension("GL_KHR_texture_compression_astc_ldr"));
private static readonly Lazy<bool> _supportsDrawTexture = new Lazy<bool>(() => HasExtension("GL_NV_draw_texture"));
private static readonly Lazy<bool> _supportsFragmentShaderInterlock = new Lazy<bool>(() => HasExtension("GL_ARB_fragment_shader_interlock"));
private static readonly Lazy<bool> _supportsFragmentShaderOrdering = new Lazy<bool>(() => HasExtension("GL_INTEL_fragment_shader_ordering"));
private static readonly Lazy<bool> _supportsImageLoadFormatted = new Lazy<bool>(() => HasExtension("GL_EXT_shader_image_load_formatted"));
private static readonly Lazy<bool> _supportsIndirectParameters = new Lazy<bool>(() => HasExtension("GL_ARB_indirect_parameters"));
private static readonly Lazy<bool> _supportsParallelShaderCompile = new Lazy<bool>(() => HasExtension("GL_ARB_parallel_shader_compile"));
private static readonly Lazy<bool> _supportsPolygonOffsetClamp = new Lazy<bool>(() => HasExtension("GL_EXT_polygon_offset_clamp"));
private static readonly Lazy<bool> _supportsQuads = new Lazy<bool>(SupportsQuadsCheck);
private static readonly Lazy<bool> _supportsSeamlessCubemapPerTexture = new Lazy<bool>(() => HasExtension("GL_ARB_seamless_cubemap_per_texture"));
private static readonly Lazy<bool> _supportsShaderBallot = new Lazy<bool>(() => HasExtension("GL_ARB_shader_ballot"));
private static readonly Lazy<bool> _supportsTextureShadowLod = new Lazy<bool>(() => HasExtension("GL_EXT_texture_shadow_lod"));
private static readonly Lazy<bool> _supportsViewportSwizzle = new Lazy<bool>(() => HasExtension("GL_NV_viewport_swizzle"));
private static readonly Lazy<int> _maximumComputeSharedMemorySize = new Lazy<int>(() => GetLimit(All.MaxComputeSharedMemorySize));
private static readonly Lazy<int> _storageBufferOffsetAlignment = new Lazy<int>(() => GetLimit(All.ShaderStorageBufferOffsetAlignment));
public enum GpuVendor
{
Unknown,
AmdWindows,
AmdUnix,
IntelWindows,
IntelUnix,
Nvidia
}
private static readonly Lazy<GpuVendor> _gpuVendor = new Lazy<GpuVendor>(GetGpuVendor);
private static bool _isAMD => _gpuVendor.Value == GpuVendor.AmdWindows || _gpuVendor.Value == GpuVendor.AmdUnix;
private static bool _isIntel => _gpuVendor.Value == GpuVendor.IntelWindows || _gpuVendor.Value == GpuVendor.IntelUnix;
public static GpuVendor Vendor => _gpuVendor.Value;
private static Lazy<float> _maxSupportedAnisotropy = new Lazy<float>(GL.GetFloat((GetPName)All.MaxTextureMaxAnisotropy));
public static bool UsePersistentBufferForFlush => _gpuVendor.Value == GpuVendor.AmdWindows || _gpuVendor.Value == GpuVendor.Nvidia;
public static bool SupportsAstcCompression => _supportsAstcCompression.Value;
public static bool SupportsDrawTexture => _supportsDrawTexture.Value;
public static bool SupportsFragmentShaderInterlock => _supportsFragmentShaderInterlock.Value;
public static bool SupportsFragmentShaderOrdering => _supportsFragmentShaderOrdering.Value;
public static bool SupportsImageLoadFormatted => _supportsImageLoadFormatted.Value;
public static bool SupportsIndirectParameters => _supportsIndirectParameters.Value;
public static bool SupportsParallelShaderCompile => _supportsParallelShaderCompile.Value;
public static bool SupportsPolygonOffsetClamp => _supportsPolygonOffsetClamp.Value;
public static bool SupportsQuads => _supportsQuads.Value;
public static bool SupportsSeamlessCubemapPerTexture => _supportsSeamlessCubemapPerTexture.Value;
public static bool SupportsShaderBallot => _supportsShaderBallot.Value;
public static bool SupportsTextureShadowLod => _supportsTextureShadowLod.Value;
public static bool SupportsViewportSwizzle => _supportsViewportSwizzle.Value;
public static bool SupportsMismatchingViewFormat => _gpuVendor.Value != GpuVendor.AmdWindows && _gpuVendor.Value != GpuVendor.IntelWindows;
public static bool SupportsNonConstantTextureOffset => _gpuVendor.Value == GpuVendor.Nvidia;
public static bool RequiresSyncFlush => _gpuVendor.Value == GpuVendor.AmdWindows || _isIntel;
public static int MaximumComputeSharedMemorySize => _maximumComputeSharedMemorySize.Value;
public static int StorageBufferOffsetAlignment => _storageBufferOffsetAlignment.Value;
public static float MaximumSupportedAnisotropy => _maxSupportedAnisotropy.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;
}
}
return false;
}
private static int GetLimit(All name)
{
return GL.GetInteger((GetPName)name);
}
private static GpuVendor GetGpuVendor()
{
string vendor = GL.GetString(StringName.Vendor).ToLower();
if (vendor == "nvidia corporation")
{
return GpuVendor.Nvidia;
}
else if (vendor == "intel")
{
string renderer = GL.GetString(StringName.Renderer).ToLower();
return renderer.Contains("mesa") ? GpuVendor.IntelUnix : GpuVendor.IntelWindows;
}
else if (vendor == "ati technologies inc." || vendor == "advanced micro devices, inc.")
{
return GpuVendor.AmdWindows;
}
else if (vendor == "amd" || vendor == "x.org")
{
return GpuVendor.AmdUnix;
}
else
{
return GpuVendor.Unknown;
}
}
private static bool SupportsQuadsCheck()
{
GL.GetError(); // Clear any existing error.
GL.Begin(PrimitiveType.Quads);
GL.End();
return GL.GetError() == ErrorCode.NoError;
}
}
}
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