文档

Unity Engine

User Manual

Script Reference

Unity Engine

isReadable

Whether Unity stores an additional copy of this texture's pixel data in CPU-addressable memory.
阅读时间1 分钟最后更新于 1 个月前

Definition

  • Type: Property
  • Namespace: UnityEngine
  • Assembly: UnityEngine.CoreModule
public virtual bool isReadable { get; }

Remarks

This is required for methods that read, write, and manipulate the pixel data on the CPU, such as Texture2D.GetPixels or ImageConversion.EncodeToPNG. It is not required for methods that perform all their work on the GPU, such as Graphics.CopyTexture or Graphics.Blit.
By default, this is 
false
for texture assets that you import into your project. To toggle this, use the Read/Write Enabled setting in the Texture Import Settings, or set TextureImporter.isReadable.
By default, this is 
true
when you create a texture from a script.
Note: Readable textures use more memory than non-readable textures. You should only make a texture readable when you need to, and you should make textures non-readable when you are done working with the data on the CPU.
To make a texture non-readable at runtime, call the 
Apply
method for your type of texture, for example Texture2D.Apply or Cubemap.Apply and set the 
makeNoLongerReadable
parameter to 
true
.