小功能⭐️Unity中Texture2DSpriteTextureRenderTextureimagebyte的转换
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文章目录
🟥 Texture2D与Sprite互转
//转化后大小跟屏幕一样大
Sprite prite = Sprite.Create(要转换的Texture2D,
new Rect(0, 0, Screen.width, Screen.height),
new Vector2(0.5f, 0.5f));
//保持原有大小
Sprite prite = Sprite.Create(原图片,
new Rect(0, 0, 原图片.width, 原图片.height),
new Vector2(0.5f, 0.5f));
//sprite为图集中的某个子Sprite对象
var targetTex = new Texture2D((int)sprite.rect.width, (int)sprite.rect.height);
var pixels = sprite.texture.GetPixels(
(int)sprite.textureRect.x,
(int)sprite.textureRect.y,
(int)sprite.textureRect.width,
(int)sprite.textureRect.height);
targetTex.SetPixels(pixels);
targetTex.Apply();
注意:
若想从Sprite转成Texture2D,如果你的Sprite是工程里的一张图片,
则该图片需勾选Read/Write Enabled 选项,否则会报 Texture ‘xxx’ is not readable 这个错误。
🟧 Texture和Texture2D转化
1️⃣ Texture转Texture2D
a、编辑器模式下
/// <summary>
/// 编辑器模式下Texture转换成Texture2D
/// </summary>
/// <param name="texture"></param>
/// <returns></returns>
private Texture2D TextureToTexture2D(Texture texture)
Texture2D texture2d = texture as Texture2D;
UnityEditor.TextureImporter ti = (UnityEditor.TextureImporter)UnityEditor.TextureImporter.GetAtPath(UnityEditor.AssetDatabase.GetAssetPath(texture2d));
//图片Read/Write Enable的开关
ti.isReadable = true;
UnityEditor.AssetDatabase.ImportAsset(UnityEditor.AssetDatabase.GetAssetPath(texture2d));
return texture2d;
b、运行模式下
/// <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;
2️⃣ Texture2D转Texture
Texture2D->Sprite->Texture
🟨 sprite 和 bytes[] 的互相转换
1️⃣ 从sprite 转换到bytes[]
public byte[] GetByte(Sprite sp)
//转换成Texture
Texture2D temp = sp.texture;
//在转换成bytes
byte[] photoByte = temp.EncodeToPNG();
return photoByte;
2️⃣ 从bytes[] 转换到Sprite
public Sprite GetSprite(Byte[] bytes)
//先创建一个Texture2D对象,用于把流数据转成Texture2D
Texture2D texture = new Texture2D(10, 10);
texture.LoadImage(bytes);//流数据转换成Texture2D
//创建一个Sprite,以Texture2D对象为基础
Sprite sp = Sprite.Create(texture, new Rect(0, 0, texture.width, texture.height), Vector2.zero);
return sp;
🟩 操作文件File类方法
读、写、移动、删除等 操作文件File类方法、文件操作相关类知识
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