Is there an existing issue for this?

• I have searched the existing issues
• I have read the guide to filing a bug

Use case

I have an external texture that I want to render using FragmentShader. I see that FragmentShader.setImageSampler accepts Image only, and there's no way to pass Texture sampler.

I don't have a workaround for now, but I'm considering using decodeImageFromPixels instead of working with Texture directly.

Proposal

Future<FragmentShader> loadShader() async {
  var textureId = await _createExternalTexture();
  var texture = Texture(textureId: textureId);

  var program = await FragmentProgram.fromAsset('shaders/myshader.frag');
  var shader = program.fragmentShader();
  shader.setImageSampler(0, texture);

  return shader;
}