shader_version/
lib.rs

1#![deny(missing_docs)]
2#![deny(missing_copy_implementations)]
3
4//! A helper library for detecting and picking compatible shaders.
5
6extern crate graphics_api_version;
7
8pub use opengl::{OpenGL, ParseOpenGLError};
9
10pub mod opengl;
11pub mod glsl;
12
13use std::collections::BTreeMap;
14
15/// Shader picker.
16pub struct Shaders<'a, V, S: 'a + ?Sized>(BTreeMap<V, &'a S>);
17
18impl<'a, V, S: ?Sized> Shaders<'a, V, S> where V: PickShader {
19    /// Creates a new shader picker.
20    pub fn new() -> Self {
21        Shaders(BTreeMap::new())
22    }
23
24    /// Sets source for a shader version.
25    pub fn set(&mut self, version: V, source: &'a S) -> &mut Self {
26        self.0.insert(version, source);
27        self
28    }
29
30    /// Get the closest shader to a shader version.
31    pub fn get(&self, version: V) -> Option<&S> {
32        version.pick_shader(self)
33    }
34}
35
36/// Implemented by shader version enums.
37pub trait PickShader: Ord + Sized {
38    /// Pick shader.
39    fn pick_shader<'a, S: ?Sized>(self, shaders: &Shaders<'a, Self, S>) -> Option<&'a S>;
40}
shader_version/lib.rs

shader_version/
lib.rs
