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Packages/com.waveharmonic.crest/Runtime/Shaders/Surface/Shim.hlsl

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+// Crest Water System
+// Copyright © 2024 Wave Harmonic. All rights reserved.
+
+// Constants for shader graph. For example, we can force shader features when we have yet to make a keyword for it in
+// shader graph.
+
+// This file must be included before all other includes. And it must be done for every node. This is due to #ifndef
+// limiting includes from being evaluated once, and we cannot specify the order because shader graph does this.
+
+#ifndef CREST_SHADERGRAPH_CONSTANTS_H
+#define CREST_SHADERGRAPH_CONSTANTS_H
+
+// "pow(f,e) will not work for negative f"
+#pragma warning (disable : 3571)
+
+#ifdef UNIVERSAL_PIPELINE_CORE_INCLUDED
+    #define CREST_URP 1
+
+#if _SURFACE_TYPE_TRANSPARENT
+    #define d_Transparent 1
+#endif
+
+#elif BUILTIN_TARGET_API
+    #define CREST_BIRP 1
+
+    #include "Packages/com.waveharmonic.crest/Runtime/Shaders/Library/Utility/Legacy/Core.hlsl"
+
+#if _BUILTIN_SURFACE_TYPE_TRANSPARENT
+    #define d_Transparent 1
+#endif
+#else
+    // HDRP does not appear to have a reliable keyword to target.
+    #define CREST_HDRP 1
+
+#if _SURFACE_TYPE_TRANSPARENT
+    #define d_Transparent 1
+#endif
+
+    #if (SHADERPASS == SHADERPASS_SHADOWS)
+        #define CREST_SHADOWPASS 1
+    #endif
+#endif
+
+#if defined(CREST_BIRP) || defined(CREST_URP)
+#if (SHADERPASS == SHADERPASS_SHADOWCASTER)
+#define CREST_SHADOWPASS 1
+#endif
+#endif
+
+#if defined(CREST_HDRP) && (SHADERPASS == SHADERPASS_FORWARD)
+#define CREST_HDRP_FORWARD_PASS 1
+#endif
+
+#if defined(CREST_BIRP) && (SHADERPASS == SHADERPASS_FORWARD_ADD)
+#ifndef DIRECTIONAL_COOKIE
+#define d_SkipRefraction 1
+#define d_IsAdditionalLight 1
+#endif
+#endif
+
+#endif // CREST_SHADERGRAPH_CONSTANTS_H