webgl_rc/
types.rs

1use std::fmt::Display;
2use std::convert::TryFrom;
3use web_sys::{
4    WebGlRenderingContext as Context,
5};
6use super::gl::GlError;
7
8#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
9pub enum DataType {
10    Boolean,
11    Float,
12    Vec2,
13    Vec3,
14    Vec4,
15    Mat2,
16    Mat3,
17    Mat4,
18    Sampler,
19}
20
21impl DataType {
22    pub(crate) fn size_in_floats(self) -> Option<usize> {
23        match self {
24            DataType::Boolean => None,
25            DataType::Float => Some(1),
26            DataType::Vec2 => Some(2),
27            DataType::Vec3 => Some(3),
28            DataType::Vec4 => Some(4),
29            DataType::Mat2 => Some(4),
30            DataType::Mat3 => Some(9),
31            DataType::Mat4 => Some(16),
32            DataType::Sampler => None,
33        }
34    }
35}
36
37impl From<DataType> for &str {
38    fn from(value: DataType) -> &'static str {
39        match value {
40            DataType::Boolean => "bool",
41            DataType::Float => "float",
42            DataType::Vec2 => "vec2",
43            DataType::Vec3 => "vec3",
44            DataType::Vec4 => "vec4",
45            DataType::Mat2 => "mat2",
46            DataType::Mat3 => "mat3",
47            DataType::Mat4 => "mat4",
48            DataType::Sampler => "sampler2D",
49        }
50    }
51}
52
53impl Display for DataType {
54    fn fmt(&self, formatter: &mut std::fmt::Formatter<'_>) -> Result<(), std::fmt::Error> {
55        formatter.write_str((*self).into())
56    }
57}
58
59impl DataType {
60    pub fn is_numeric(self) -> bool {
61        self != DataType::Boolean && self != DataType::Sampler
62    }
63    pub fn is_vector(self) -> bool {
64        self == DataType::Vec2 || self == DataType::Vec3 || self == DataType::Vec4
65    }
66    pub fn is_matrix(self) -> bool {
67        self == DataType::Mat2 || self == DataType::Mat3 || self == DataType::Mat4
68    }
69}
70
71impl TryFrom<u32> for DataType {
72    type Error = GlError;
73    fn try_from(value: u32) -> Result<DataType, GlError> {
74        match value {
75            Context::BOOL => Ok(DataType::Boolean),
76            Context::FLOAT => Ok(DataType::Float),
77            Context::FLOAT_VEC2 => Ok(DataType::Vec2),
78            Context::FLOAT_VEC3 => Ok(DataType::Vec3),
79            Context::FLOAT_VEC4 => Ok(DataType::Vec4),
80            Context::FLOAT_MAT2 => Ok(DataType::Mat2),
81            Context::FLOAT_MAT3 => Ok(DataType::Mat3),
82            Context::FLOAT_MAT4 => Ok(DataType::Mat4),
83            Context::SAMPLER_2D => Ok(DataType::Sampler),
84            _ => Err(GlError::UnsupportedType(None))
85        }
86    }
87}
88
89impl From<DataType> for u32 {
90    fn from(data_type: DataType) -> Self {
91        match data_type {
92            DataType::Boolean => Context::BOOL,
93            DataType::Float => Context::FLOAT,
94            DataType::Vec2 => Context::FLOAT_VEC2,
95            DataType::Vec3 => Context::FLOAT_VEC3,
96            DataType::Vec4 => Context::FLOAT_VEC4,
97            DataType::Mat2 => Context::FLOAT_MAT2,
98            DataType::Mat3 => Context::FLOAT_MAT3,
99            DataType::Mat4 => Context::FLOAT_MAT4,
100            DataType::Sampler => Context::SAMPLER_2D,
101        }
102    }
103}
104
105pub trait TypeMark {
106    fn data_type() -> DataType;
107}
webgl_rc/types.rs

webgl_rc/
types.rs
