XRLib/Assets/Scripts/UVC/Extention/RenderTextureEx.cs

using UnityEngine;

namespace UVC.Extension
{
    /// <summary>
    /// RenderTexture Ȯ<><C8AE> <20>޼<EFBFBD><DEBC>带 <20><><EFBFBD><EFBFBD><EFBFBD>ϴ<EFBFBD> Ŭ<><C5AC><EFBFBD><EFBFBD><EFBFBD>Դϴ<D4B4>.
    /// </summary>
    public static class RenderTextureEx
    {
        /// <summary>
        /// RenderTexture<72><65> Texture2D<32><44> <20><>ȯ<EFBFBD>մϴ<D5B4>.
        /// </summary>
        /// <param name="renderTexture"><3E><>ȯ<EFBFBD><C8AF> RenderTexture <20><>ü</param>
        /// <returns><3E><>ȯ<EFBFBD><C8AF> Texture2D <20><>ü</returns>
        /// <example>
        /// <20><><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD>:
        /// <code>
        /// // RenderTexture <20><><EFBFBD><EFBFBD>
        /// RenderTexture renderTexture = new RenderTexture(256, 256, 24);
        /// 
        /// // ī<>޶󿡼<DEB6> renderTexture<72><65> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
        /// Camera.main.targetTexture = renderTexture;
        /// Camera.main.Render();
        /// 
        /// // RenderTexture<72><65> Texture2D<32><44> <20><>ȯ
        /// Texture2D texture2D = renderTexture.ToTexture2D();
        /// 
        /// // <20><><EFBFBD><EFBFBD> <20><> <20><><EFBFBD><EFBFBD>
        /// Camera.main.targetTexture = null;
        /// Camera.main.ResetAspect();
        /// </code>
        /// </example>
        public static Texture2D ToTexture2D(this RenderTexture renderTexture)
        {
            Texture2D texture2D = new Texture2D(renderTexture.width, renderTexture.height);
            RenderTexture.active = renderTexture;
            texture2D.ReadPixels(new UnityEngine.Rect(0, 0, renderTexture.width, renderTexture.height), 0, 0);
            texture2D.Apply();
            return texture2D;
        }

        /// <summary>
        /// RenderTexture<72><65> <20><><EFBFBD><EFBFBD>Ʈ <20>迭<EFBFBD><E8BFAD> <20><>ȯ<EFBFBD>մϴ<D5B4>.
        /// </summary>
        /// <param name="renderTexture"><3E><>ȯ<EFBFBD><C8AF> RenderTexture <20><>ü</param>
        /// <param name="format"><3E>̹<EFBFBD><CCB9><EFBFBD> <20><><EFBFBD><EFBFBD> (<28>⺻<EFBFBD><E2BABB>: PNG)</param>
        /// <returns><3E><><EFBFBD><EFBFBD>Ʈ <20>迭</returns>
        /// <example>
        /// <20><><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD>:
        /// <code>
        /// RenderTexture rt = new RenderTexture(256, 256, 24);
        /// byte[] bytes = rt.ToBytes();
        /// File.WriteAllBytes("screenshot.png", bytes);
        /// </code>
        /// </example>
        public static byte[] ToBytes(this RenderTexture renderTexture, TextureFormat format = TextureFormat.RGBA32)
        {
            Texture2D texture2D = renderTexture.ToTexture2D();
            byte[] bytes = texture2D.EncodeToPNG();
            Object.Destroy(texture2D);
            return bytes;
        }

        /// <summary>
        /// RenderTexture<72><65> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD>ο<EFBFBD> PNG <20><><EFBFBD>Ϸ<EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD>մϴ<D5B4>.
        /// </summary>
        /// <param name="renderTexture"><3E><><EFBFBD><EFBFBD><EFBFBD><EFBFBD> RenderTexture <20><>ü</param>
        /// <param name="filePath"><3E><><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD></param>
        /// <returns><3E><><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD></returns>
        /// <example>
        /// <20><><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD>:
        /// <code>
        /// RenderTexture rt = new RenderTexture(256, 256, 24);
        /// Camera.main.targetTexture = rt;
        /// Camera.main.Render();
        /// bool success = rt.SaveToPNG("Assets/Screenshots/screenshot.png");
        /// Camera.main.targetTexture = null;
        /// </code>
        /// </example>
        public static bool SaveToPNG(this RenderTexture renderTexture, string filePath)
        {
            try
            {
                byte[] bytes = renderTexture.ToBytes();
                System.IO.File.WriteAllBytes(filePath, bytes);
                return true;
            }
            catch (System.Exception e)
            {
                Debug.LogError($"RenderTexture<72><65> PNG<4E><47> <20><><EFBFBD><EFBFBD><EFBFBD>ϴ<EFBFBD> <20><> <20><><EFBFBD><EFBFBD><EFBFBD>߽<EFBFBD><DFBD>ϴ<EFBFBD>: {e.Message}");
                return false;
            }
        }

        /// <summary>
        /// RenderTexture<72><65> ũ<>⸦ <20><><EFBFBD><EFBFBD><EFBFBD>մϴ<D5B4>.
        /// </summary>
        /// <param name="renderTexture"><3E><><EFBFBD><EFBFBD> RenderTexture</param>
        /// <param name="width"><3E><> <20>ʺ<EFBFBD></param>
        /// <param name="height"><3E><> <20><><EFBFBD><EFBFBD></param>
        /// <returns>ũ<>Ⱑ <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD>ο<EFBFBD> RenderTexture</returns>
        /// <example>
        /// <20><><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD>:
        /// <code>
        /// RenderTexture originalRT = new RenderTexture(1024, 1024, 24);
        /// RenderTexture resizedRT = originalRT.Resize(512, 512);
        /// // <20><><EFBFBD><EFBFBD> <20><> <20><><EFBFBD><EFBFBD>
        /// resizedRT.Release();
        /// originalRT.Release();
        /// </code>
        /// </example>
        public static RenderTexture Resize(this RenderTexture renderTexture, int width, int height)
        {
            RenderTexture resized = new RenderTexture(width, height, renderTexture.depth);
            Graphics.Blit(renderTexture, resized);
            return resized;
        }
    }
}