From 830826ce667fd3cd9ca413a6fd618faf6f24dd4e Mon Sep 17 00:00:00 2001
From: ChrisDill <chris.rj.dill@gmail.com>
Date: Sun, 24 Oct 2021 11:15:30 +0100
Subject: [PATCH] Testing utils for Raylib.cs

---
 Raylib-cs/RaylibUtils.cs | 100 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 100 insertions(+)
 create mode 100644 Raylib-cs/RaylibUtils.cs

diff --git a/Raylib-cs/RaylibUtils.cs b/Raylib-cs/RaylibUtils.cs
new file mode 100644
index 0000000..22efcb8
--- /dev/null
+++ b/Raylib-cs/RaylibUtils.cs
@@ -0,0 +1,100 @@
+using System;
+using System.Runtime.InteropServices;
+using Raylib_cs;
+
+namespace Raylib_cs
+{
+    /// <summary>
+    /// Utility functions for parts of the api that are not easy to interact with via pinvoke.
+    /// </summary>
+    public static class Utils
+    {
+        public static string SubText(this string input, int position, int length)
+        {
+            return input.Substring(position, Math.Min(length, input.Length));
+        }
+
+        [DllImport(Raylib.nativeLibName, CallingConvention = CallingConvention.Cdecl)]
+        public static unsafe extern byte** GetDroppedFiles(int* count);
+
+        public static unsafe string[] GetDroppedFiles()
+        {
+            int count;
+            var buffer = GetDroppedFiles(&count);
+            var files = new string[count];
+
+            for (int i = 0; i < count; i++)
+            {
+                files[i] = Marshal.PtrToStringUTF8((IntPtr)buffer[i]);
+            }
+
+            Raylib.ClearDroppedFiles();
+
+            return files;
+        }
+
+        public unsafe static Material GetMaterial(ref Model model, int materialIndex)
+        {
+            Material* materials = (Material*)model.materials.ToPointer();
+            return *materials;
+        }
+
+        public unsafe static Texture2D GetMaterialTexture(ref Model model, int materialIndex, MaterialMapIndex mapIndex)
+        {
+            Material* materials = (Material*)model.materials.ToPointer();
+            MaterialMap* maps = (MaterialMap*)materials[0].maps.ToPointer();
+            return maps[(int)mapIndex].texture;
+        }
+
+        public unsafe static void SetMaterialTexture(ref Model model, int materialIndex, MaterialMapIndex mapIndex, ref Texture2D texture)
+        {
+            Material* materials = (Material*)model.materials.ToPointer();
+            Raylib.SetMaterialTexture(ref materials[materialIndex], (int)mapIndex, texture);
+        }
+
+        public unsafe static void SetMaterialShader(ref Model model, int materialIndex, ref Shader shader)
+        {
+            Material* materials = (Material*)model.materials.ToPointer();
+            materials[materialIndex].shader = shader;
+        }
+
+        public static unsafe void SetShaderValueV<T>(Shader shader, int uniformLoc, T[] values, ShaderUniformDataType uniformType, int count) where T : unmanaged
+        {
+            SetShaderValueV(shader, uniformLoc, (Span<T>)values, uniformType, count);
+        }
+
+        public static unsafe void SetShaderValueV<T>(Shader shader, int uniformLoc, Span<T> values, ShaderUniformDataType uniformType, int count) where T : unmanaged
+        {
+            fixed (T* valuePtr = values)
+            {
+                Raylib.SetShaderValueV(shader, uniformLoc, (IntPtr)valuePtr, uniformType, count);
+            }
+        }
+
+        public static unsafe void SetShaderValue<T>(Shader shader, int uniformLoc, ref T value, ShaderUniformDataType uniformType, int count = 0) where T : unmanaged
+        {
+            fixed (T* valuePtr = &value)
+            {
+                Raylib.SetShaderValue(shader, uniformLoc, (IntPtr)valuePtr, uniformType);
+            }
+        }
+
+        public static unsafe void SetShaderValue<T>(Shader shader, int uniformLoc, T value, ShaderUniformDataType uniformType) where T : unmanaged
+        {
+            Raylib.SetShaderValue(shader, uniformLoc, (IntPtr)(&value), uniformType);
+        }
+
+        public static unsafe void SetShaderValue<T>(Shader shader, int uniformLoc, T[] values, ShaderUniformDataType uniformType) where T : unmanaged
+        {
+            SetShaderValue(shader, uniformLoc, (Span<T>)values, uniformType);
+        }
+
+        public static unsafe void SetShaderValue<T>(Shader shader, int uniformLoc, Span<T> values, ShaderUniformDataType uniformType) where T : unmanaged
+        {
+            fixed (T* valuePtr = values)
+            {
+                Raylib.SetShaderValue(shader, uniformLoc, (IntPtr)valuePtr, uniformType);
+            }
+        }
+    }
+}