using Blue;
using UnityEngine;
using UnityEngine.UI;

namespace GHZLangChao
{
    /// <summary>
    /// RawImage 转 Sprite
    /// </summary>
    public interface IRawImageForSpriteUtility : IUtility
    {
        Sprite SwitchSprite(RawImage rawImage);
    }

    public class RawImageForSpriteUtility : IRawImageForSpriteUtility
    {
        public Sprite SwitchSprite(RawImage rawImage)
        {
            // 获取RawImage的纹理
            Texture2D rawTexture = TextureToTexture2D(rawImage.texture);
            // 创建一个新的纹理，用于截图
            Texture2D screenshot = new Texture2D(rawTexture.width, rawTexture.height);
            // 截取RawImage的画面，并应用到新的纹理上
            screenshot.SetPixels(rawTexture.GetPixels());
            screenshot.Apply();
            // 将截图应用到Image组件上
            Sprite sprite = Sprite.Create(screenshot, new Rect(0, 0, screenshot.width, screenshot.height), new Vector2(0.5f, 0.5f));
            return sprite;
        }

        /// <summary>
        /// 运行模式下Texture转换成Texture2D
        /// </summary>
        /// <param name="texture"></param>
        /// <returns></returns>
        private Texture2D TextureToTexture2D(Texture texture)
        {
            Texture2D texture2D = new Texture2D(texture.width, texture.height, TextureFormat.RGBA32, false);
            RenderTexture currentRT = RenderTexture.active;
            RenderTexture renderTexture = RenderTexture.GetTemporary(texture.width, texture.height, 32);
            Graphics.Blit(texture, renderTexture);

            RenderTexture.active = renderTexture;
            texture2D.ReadPixels(new Rect(0, 0, renderTexture.width, renderTexture.height), 0, 0);
            texture2D.Apply();

            RenderTexture.active = currentRT;
            RenderTexture.ReleaseTemporary(renderTexture);

            return texture2D;
        }
    }
}