[SOLVED] Detect when Texture has alpha channel

Hello all!

I´m working on each gpu type on Android plaftorm, so I´m using a custom OnPreprocessTexture like this:

Code (csharp):

1. class MyTexturePostprocessor extends AssetPostprocessor {
2.  
3.  
4.     function OnPreprocessTexture () {
5.    
6.  
7.             var importer : TextureImporter = assetImporter;
8.  
9.             var textformat : TextureImporterFormat;
10.             var textSize : int;
11.            
12.             if ( importer.GetPlatformTextureSettings("Android",textSize,textformat) == false ){
13.            
14.                 importer.SetPlatformTextureSettings("Android", importer.maxTextureSize, TextureImporterFormat.ATC_RGBA8);
15.                
16.             }
17.            
18.            
19.     }
20.    
21.    
22.    
23.    
24. }

I want to set a ATC_RGBA8 format for textures that it has alpha channel, but I want to use ATC_RGB4 to textures that it has no alpha channel.

How can I detect the presence of alpha channel on a texture?

Thanks

 

TextureImporter.DoesSourceTextureHaveAlpha

Thanks

 

Does this detect if there is an unesed alpha channel? For instance, the case where every pixel has 0xFF alpha?

 

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