Shaders how can i access some essential things like time passed ? [SOLVED]

[Kasra]

Hi, i just started to learning shaders (GLSLES)
it need to know how can i get mouse_x/y, time pass after running shader, reselution or etc as a variable or uniform ?

 

[NeZvers]

current_time
you can save current_time in a variable to hold starting time and compare current_time against the saved variable. Remember it is in 1/1000 seconds.

 

[Kasra]

no it was not the issue that i try to point at, i just didnt know how to pass variables to shaders[Since the GPU Threads are blind], so that solved.
it is something like this:

// draw event
shader_set(sh_00);
var uni = shader_get_uniform(sh_00, "u_screen_width");
shader_set_uniform_i(uni, display_get_width());
draw_sprite(spr, 0, 0, 0);
shader_reset();
//end draw event
// now the shader code
uniform int u_screen_width;
void main()
{
gl_FragColor = vec4(0.0, 0.0, 0.0, 1.0);
}