[go: up one dir, main page]

glium 0.36.0

Elegant and safe OpenGL wrapper. Glium is an intermediate layer between OpenGL and your application. You still need to manually handle the graphics pipeline, but without having to use OpenGL's old and error-prone API. Its objectives: - Be safe to use. Many aspects of OpenGL that can trigger a crash if misused are automatically handled by glium. - Provide an API that enforces good pratices such as RAII or stateless function calls. - Be compatible with all OpenGL versions that support shaders, providing unified API when things diverge. - Avoid all OpenGL errors beforehand. - Produce optimized OpenGL function calls, and allow the user to easily use modern OpenGL techniques.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86

use crate::uniforms::{Uniforms, UniformValue, AsUniformValue};
use std::collections::HashMap;

/// Object that can be used when you don't have any uniforms.
#[derive(Debug, Copy, Clone)]
pub struct EmptyUniforms;

impl Uniforms for EmptyUniforms {
    #[inline]
    fn visit_values<'a, F: FnMut(&str, UniformValue<'a>)>(&'a self, _: F) {
    }
}

/// Stores uniforms.
#[derive(Copy, Clone)]
pub struct UniformsStorage<'n, T, R> where T: AsUniformValue, R: Uniforms {
    name: &'n str,
    value: T,
    rest: R,
}

impl<'n, T> UniformsStorage<'n, T, EmptyUniforms> where T: AsUniformValue {
    /// Builds a new storage with a value.
    #[inline]
    pub fn new(name: &'n str, value: T)
               -> UniformsStorage<'n, T, EmptyUniforms>
    {
        UniformsStorage {
            name,
            value,
            rest: EmptyUniforms,
        }
    }
}

impl<'n, T, R> UniformsStorage<'n, T, R> where T: AsUniformValue, R: Uniforms {
    /// Adds a value to the storage.
    #[inline]
    pub fn add<U>(self, name: &'n str, value: U)
                  -> UniformsStorage<'n, U, UniformsStorage<'n, T, R>>
                  where U: AsUniformValue
    {
        UniformsStorage {
            name,
            value,
            rest: self,
        }
    }
}

impl<'n, T, R> Uniforms for UniformsStorage<'n, T, R> where T: AsUniformValue, R: Uniforms {
    #[inline]
    fn visit_values<'a, F: FnMut(&str, UniformValue<'a>)>(&'a self, mut output: F) {
        output(self.name, self.value.as_uniform_value());
        self.rest.visit_values(output);
    }
}

/// Stores Uniforms dynamicly in a HashMap.
#[derive(Clone)]
pub struct DynamicUniforms<'a, 's>{
    map: HashMap<&'s str, UniformValue<'a>>,
}

impl<'a, 's> DynamicUniforms<'a, 's>{
    /// Creates new DynamicUniforms
    pub fn new() -> Self{
        Self{
            map: HashMap::new()
        }
    }

    /// Add a value to the DynamicUniforms
    #[inline]
    pub fn add(&mut self, key: &'s str, value: &'a dyn AsUniformValue){
        self.map.insert(key, value.as_uniform_value());
    }
}

impl Uniforms for DynamicUniforms<'_, '_>{
    fn visit_values<'a, F: FnMut(&str, UniformValue<'a>)>(&'a self, mut output: F) {
        for (key, value) in self.map.iter(){
            output(key, *value);
        }
    }
}