Initial work

1 files changed, 45 insertions, 0 deletions

diff --git a/Ryujinx.Graphics.Shader/InterpolationQualifier.cs b/Ryujinx.Graphics.Shader/InterpolationQualifier.cs
new file mode 100644
index 00000000..e710427d
--- /dev/null
+++ b/Ryujinx.Graphics.Shader/InterpolationQualifier.cs
@@ -0,0 +1,45 @@
+using System;
+
+namespace Ryujinx.Graphics.Shader
+{
+    [Flags]
+    public enum InterpolationQualifier
+    {
+        None = 0,
+
+        Flat          = 1,
+        NoPerspective = 2,
+        Smooth        = 3,
+
+        Centroid = 1 << 16,
+        Sample   = 1 << 17,
+
+        FlagsMask = Centroid | Sample
+    }
+
+    public static class InterpolationQualifierExtensions
+    {
+        public static string ToGlslQualifier(this InterpolationQualifier iq)
+        {
+            string output = string.Empty;
+
+            switch (iq & ~InterpolationQualifier.FlagsMask)
+            {
+                case InterpolationQualifier.Flat:          output = "flat";          break;
+                case InterpolationQualifier.NoPerspective: output = "noperspective"; break;
+                case InterpolationQualifier.Smooth:        output = "smooth";        break;
+            }
+
+            if ((iq & InterpolationQualifier.Centroid) != 0)
+            {
+                output = "centroid " + output;
+            }
+            else if ((iq & InterpolationQualifier.Sample) != 0)
+            {
+                output = "sample " + output;
+            }
+
+            return output;
+        }
+    }
+}
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