Unity 贴图拷贝与性能对比
Cooooopy
- 🌳GetPixels
- 🌳GetRawTextureData
- 🌳RenderTexture
- 🌳Graphics.CopyTexture
- 🌭性能对比
🌳GetPixels
var pixels = tex.GetPixels();tex2.SetPixels(pixels);tex2.Apply();
🌳GetRawTextureData
var pixels = tex.GetRawTextureData();tex2.LoadRawTextureData(pixels);tex2.Apply();
🌳RenderTexture
public static void textureToTexture2D(Texture texture, Texture2D texture2D)
{if (texture == null)throw new ArgumentNullException("texture");if (texture2D == null)throw new ArgumentNullException("texture2D");if (texture.width != texture2D.width || texture.height != texture2D.height)throw new ArgumentException("texture and texture2D need to be the same size.");RenderTexture prevRT = RenderTexture.active;if (texture is RenderTexture){RenderTexture.active = (RenderTexture)texture;texture2D.ReadPixels(new UnityEngine.Rect(0f, 0f, texture.width, texture.height), 0, 0, false);texture2D.Apply(false, false);}else{RenderTexture tempRT = RenderTexture.GetTemporary(texture.width, texture.height, 0, RenderTextureFormat.ARGB32);Graphics.Blit(texture, tempRT);RenderTexture.active = tempRT;texture2D.ReadPixels(new UnityEngine.Rect(0f, 0f, texture.width, texture.height), 0, 0, false);texture2D.Apply(false, false);RenderTexture.ReleaseTemporary(tempRT);}RenderTexture.active = prevRT;
}
🌳Graphics.CopyTexture
不需要apply!!!
Graphics.CopyTexture(tex1, tex2);
🌭性能对比
在测试环境每帧调用 把Texture2D拷贝到另一张Texture2D上。
| Method | cpu （基于已有工程测试，只改变拷贝方法） |
|---|---|
| GetPixels | 20.3ms |
| RenderTexture | 7.9ms |
| GetRawTextureData | 8.8ms |
| Graphics.CopyTexture | 5.2ms |