From 5ab20eb2d20d491e258047bd94d9d9d0ac5a5dbf Mon Sep 17 00:00:00 2001
From: Yong He <yonghe@outlook.com>
Date: Fri, 23 Feb 2018 17:22:36 -0500
Subject: Refactor IR type system, step 0

Pull BaseType, TextureFlavor and SamplerStateFlavor enums and helper functions into a shared file "type-system-shared.h".
---
 source/slang/type-system-shared.h | 77 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 77 insertions(+)
 create mode 100644 source/slang/type-system-shared.h

(limited to 'source/slang/type-system-shared.h')

diff --git a/source/slang/type-system-shared.h b/source/slang/type-system-shared.h
new file mode 100644
index 000000000..5316dfa6e
--- /dev/null
+++ b/source/slang/type-system-shared.h
@@ -0,0 +1,77 @@
+#ifndef SLANG_TYPE_SYSTEM_SHARED_H
+#define SLANG_TYPE_SYSTEM_SHARED_H
+
+#include "../../slang.h"
+
+namespace Slang
+{
+    enum class BaseType
+    {
+        Void = 0,
+        Bool,
+        Int,
+        UInt,
+        UInt64,
+        Half,
+        Float,
+        Double,
+    };
+
+    struct TextureFlavor
+    {
+        enum
+        {
+            // Mask for the overall "shape" of the texture
+            ShapeMask = SLANG_RESOURCE_BASE_SHAPE_MASK,
+
+            // Flag for whether the shape has "array-ness"
+            ArrayFlag = SLANG_TEXTURE_ARRAY_FLAG,
+
+            // Whether or not the texture stores multiple samples per pixel
+            MultisampleFlag = SLANG_TEXTURE_MULTISAMPLE_FLAG,
+
+            // Whether or not this is a shadow texture
+            //
+            // TODO(tfoley): is this even meaningful/used?
+            // ShadowFlag		= 0x80, 
+        };
+
+        enum Shape : uint8_t
+        {
+            Shape1D = SLANG_TEXTURE_1D,
+            Shape2D = SLANG_TEXTURE_2D,
+            Shape3D = SLANG_TEXTURE_3D,
+            ShapeCube = SLANG_TEXTURE_CUBE,
+            ShapeBuffer = SLANG_TEXTURE_BUFFER,
+
+            Shape1DArray = Shape1D | ArrayFlag,
+            Shape2DArray = Shape2D | ArrayFlag,
+            // No Shape3DArray
+            ShapeCubeArray = ShapeCube | ArrayFlag,
+        };
+
+        uint16_t flavor;
+
+        Shape GetBaseShape() const { return Shape(flavor & ShapeMask); }
+        bool isArray() const { return (flavor & ArrayFlag) != 0; }
+        bool isMultisample() const { return (flavor & MultisampleFlag) != 0; }
+        //            bool isShadow() const { return (flavor & ShadowFlag) != 0; }
+
+        SlangResourceShape getShape() const { return flavor & 0xFF; }
+        SlangResourceAccess getAccess() const { return (flavor >> 8) & 0xFF; }
+
+        TextureFlavor() = default;
+        TextureFlavor(uint32_t tag) { flavor = (uint16_t)tag; }
+
+        static TextureFlavor create(SlangResourceShape shape, SlangResourceAccess access);
+    };
+
+    enum class SamplerStateFlavor : uint8_t
+    {
+        SamplerState,
+        SamplerComparisonState,
+    };
+
+}
+
+#endif
\ No newline at end of file
-- 
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