koobas.hobune.stream
convert Texture to Texture2D
Hello guys, I want to save a custom painted texture of car in device storage (android/IOS) but my painted texture is of Texture type, now I need to convert it to Texture2D to have a byte format to save it into device. Searched many demos and examples but none works. Thanks!
After some digging I found another link which explains your situation, see if this helps you. Copying it here for future sake (Credit To:BBIT-SOLUTIONS):
Texture mainTexture = renderer.material.mainTexture;
Texture2D texture2D = new Texture2D(mainTexture.width, mainTexture.height, TextureFormat.RGBA32, false);
RenderTexture currentRT = RenderTexture.active;
RenderTexture renderTexture = new RenderTexture(mainTexture.width, mainTexture.height, 32);
Graphics.Blit(mainTexture, renderTexture);
RenderTexture.active = renderTexture;
texture2D.ReadPixels(new Rect(0, 0, renderTexture.width, renderTexture.height), 0, 0);
texture2D.Apply();
Color[] pixels = texture2D.GetPixels();
RenderTexture.active = currentRT;
Hmmm. I'm totally unaware of Graphics.Blit(). I should try it! Thank you again!
You can simply cast your Texture to a Texture2D. Like So:
Texture2D tex2D = (Texture2D)PaintedTexture;
Gives an error "InvalidCastException: Cannot cast from source type to destination type." Even PaintedTexture as Texture2D doesn't work.
You can definitely convert a Texture to Texture2D as shown above. Are you sure PaintedTexture is of type Texture? Some code from you might help
Actually, no. You can't always cast a Texture to a Texture2D. You can only do that if the texture is actually a Texture2D. Texture is the base class for all texture types. Currently there are only two texture types: Texture2D and RenderTexture. If the texture you want to cast to Texture2d is a RenderTexture it will fail.
Texture2D has a representation on the GPU and might also have one on the CPU side. RenderTextures are pure GPU textures. If you want to "convert" a RenderTexture to a Texture2D you actually have to copy the content like Vincent1236 showed in his answer.
In 2018.3.11, it does work on the Editor but however it gives the following error. InvalidCastException: Specified cast is not valid.
Unity 2018+
public static class TextureExtentions
{
public static Texture2D ToTexture2D(this Texture texture)
{
return Texture2D.CreateExternalTexture(
texture.width,
texture.height,
TextureFormat.RGB24,
false, false,
texture.GetNativeTexturePtr());
}
}
Usage:
Texture2D texture2D = your_texture.ToTexture2D();
Worth noting - Unity will die if you use this code on anything runtime generated. Only use this if you imported the asset into Unity Editor.
Unity 2020 crash
