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use crate::prelude::*;
use crate::{Context, GLContext, Sampler, Texture2D};
type ProgramResource = <glow::Context as HasContext>::Program;
pub struct Program {
pub(crate) gl : GLContext,
resource : ProgramResource
}
impl Program {
pub fn new(context: &Context) -> Self {
let gl = context.gl_context();
let resource = unsafe {
gl.create_program().expect("Couldn't create program")
};
Self { gl, resource}
}
pub fn resource(&self) -> ProgramResource { self.resource }
pub fn uniform_mat4(&mut self, location: usize, transpose: bool, v: &[f32]) {
unsafe {
self.gl.gl.uniform_matrix_4_f32_slice(Some(location as u32).as_ref(), transpose, v);
}
}
pub fn bind_texture_2d(&mut self, texture:&Texture2D, sampler:&Sampler, index:u32) {
unsafe {
self.gl.active_texture(glow::TEXTURE0 + index);
self.gl.bind_texture(glow::TEXTURE_2D, Some(texture.resource()));
self.gl.bind_sampler(index, Some(sampler.resource()));
self.gl.use_program(Some(self.resource()));
self.gl.uniform_1_i32(Some(&index), index as i32);
}
}
pub fn bind_vec2(&mut self, vec2:(f32, f32), index:u32) {
unsafe {
self.gl.uniform_2_f32(Some(&index), vec2.0, vec2.1);
}
}
}
impl Drop for Program {
fn drop(&mut self) {
unsafe {
self.gl.delete_program(self.resource());
}
}
}