GLSL filter shaders

WORK IN PROGRESS

Things to know:

• uniforms are automatically added as an attribute to the Filter object

• … except when the name starts with an underscore

• default uniforms are:

  • texture samplers: _tex0, _tex1, …

  • texture size: _tex0_size, _tex1_size, …

  • time since epoch: _time

Here is a quick example, to be improved:

#version 450 core

in vec2 tc;
out vec4 fc;

uniform float _time;
uniform vec2 vector = vec2(0.0, 1.0);

void main(void)
{
    fc = vec4(sin(_time / 1000.f), vector.x, cos(_time / 1543.f), 1.0);
}