GradientExtensions.cs

/* Written by Jacob Fletcher - 2022 | Free to alter and use! */

using UnityEngine;

namespace PicoGames
{
    public static class GradientExtensions
    {
        /// <summary>
        /// Converts the Gradient into a new texture.
        /// </summary>
        /// <param name="grad">Gradient to be converted</param>
        /// <param name="width">Pixel width of texture to be created (default: 32x1)</param>
        /// <param name="filterMode">Filter mode of the texture to be created</param>
        public static Texture2D ToTexture2D(this Gradient grad, int width = 32, FilterMode filterMode = FilterMode.Bilinear)
        {
            Texture2D tex = new Texture2D(width, 1, TextureFormat.ARGB32, false);

            tex.filterMode = filterMode;
            tex.wrapMode = TextureWrapMode.Clamp;

            for (int x = 0; x < tex.width; x++)
                tex.SetPixel(x, 0, grad.Evaluate(x / (float)(tex.width - 2)));

            tex.Apply();

            return tex;
        }

        /// <summary>
        /// Converts the Gradient into the provided texture.
        /// </summary>
        /// <param name="grad">Gradient to be converted</param>
        /// <param name="texRef"></param>
        /// <param name="width">Pixel width of texture to be created (default: 32x1)</param>
        /// <param name="filterMode">Filter mode of the texture to be created (default: Bilinear)</param>
        public static void ToTexture2D(this Gradient grad, ref Texture2D texRef, int width = 32, FilterMode filterMode = FilterMode.Bilinear)
        {
            if(texRef == null || texRef.width != width || texRef.height != 1 || texRef.filterMode != filterMode)
                texRef = new Texture2D(width, 1, TextureFormat.ARGB32, false);

            texRef.filterMode = filterMode;
            texRef.wrapMode = TextureWrapMode.Clamp;

            for (int x = 0; x < texRef.width; x++)
                texRef.SetPixel(x, 0, grad.Evaluate(x / (float)(texRef.width - 2)));

            texRef.Apply();
        }
    }
}