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use crate::*;

pub struct FXAAEffect {
    gl: Gl,
    pub color: Vec3,
    pub density: f32,
    pub animation: f32,
    image_effect: ImageEffect
}

impl FXAAEffect {

    pub fn new(gl: &Gl) -> Result<Self, Error>
    {
        Ok(Self {gl: gl.clone(), color: vec3(0.8, 0.8, 0.8), density: 0.2, animation: 0.1, image_effect: ImageEffect::new(gl, include_str!("shaders/fxaa.frag"))?})
    }

    pub fn apply(&self, color_texture: &Texture2D) -> Result<(), Error>
    {
        state::depth_write(&self.gl,false);
        state::depth_test(&self.gl, state::DepthTestType::None);
        state::blend(&self.gl, state::BlendType::None);

        self.image_effect.program().use_texture(color_texture, "colorMap")?;
        self.image_effect.program().add_uniform_vec2("resolution", &vec2(color_texture.width as f32, color_texture.height as f32))?;

        self.image_effect.apply();
        Ok(())
    }

}