layer_get_shader

This function can be used to check if the given layer has a shader assigned to it. You supply the layer ID (which you get when you create the layer using layer_create()) or the layer name (as a string - this will have a performance impact), and the function will return either the shader index of the shader assigned, or -1 if no shader is assigned.

Syntax:

layer_get_shader(layer_id)

Returns:

Shader Asset or -1 (if no shader is assigned)

Example:

if (layer_get_shader(layer) == -1)
{
    layer_shader(layer, shd_Sepia);
}

The above code will check to see if the layer that the instance running the code has a shader assigned to it and if it doesn't one is assigned.