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Fix MoltenVK support #2

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Fix MoltenVK support #2

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f36906d
Add portability enum
tdrkDev Jun 10, 2025
c87618f
Use libMoltenVK on macOS
tdrkDev Jun 10, 2025
ef1d8a2
Try to load MoltenVK from Homebrew on macOS
tdrkDev Jun 10, 2025
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16 changes: 15 additions & 1 deletion src/vk/Commands.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -47,7 +47,9 @@ private static string GetVulkanName()
#endif
else if (RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
{
return "libvulkan.dylib";
// libvulkan.dylib is an additional translation layer from Vulkan SDK.
// libMoltenVK supports libvulkan functions already.
return "libMoltenVK.dylib";
}
else
{
Expand Down Expand Up @@ -160,6 +162,18 @@ protected override IntPtr LoadLibrary(string libraryName)
string localPath = Path.Combine(baseDir, libraryName);
handle = Libdl.dlopen(localPath, Libdl.RTLD_NOW);
}

if (handle == IntPtr.Zero && RuntimeInformation.IsOSPlatform(OSPlatform.OSX)) {
// Try to load system-wide MoltenVK from /usr/local/lib or /opt/homebrew/lib.
// It is not possible to install MoltenVK under /usr/lib on macOS due to System Integrity Protection.
string localPath = Path.Combine("/opt/homebrew/lib", libraryName);
handle = Libdl.dlopen(localPath, Libdl.RTLD_NOW);

if (handle == IntPtr.Zero) {
localPath = Path.Combine("/usr/local/lib", libraryName);
handle = Libdl.dlopen(localPath, Libdl.RTLD_NOW);
}
}
}

return handle;
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16 changes: 16 additions & 0 deletions src/vk/Enums.cs
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Original file line number Diff line number Diff line change
@@ -0,0 +1,16 @@
namespace Vulkan
{
public enum VkInstanceCreateFlagBits: uint {
/// <summary>
/// Provided by VK_KHR_portability_enumeration. Specifies that the instance will enumerate
/// available Vulkan Portability-compliant physical devices and groups in addition to the
/// Vulkan physical devices and groups that are enumerated by default.
/// </summary>
PortabilityBitKHR = 1,
};

public static partial class RawConstants
{
public const VkInstanceCreateFlagBits VK_INSTANCE_CREATE_ENUMERATE_PORTABILITY_BIT_KHR = VkInstanceCreateFlagBits.PortabilityBitKHR;
};
}