c6ac1827f6
* egui_web: use tracing crate * egui_glow: use tracing crate * Log at the debug level * egui_demo_app: enable tracing to log to stdout * Use tracing in egui-winit * Add opt-in tracing support to egui
85 lines
2.4 KiB
Rust
85 lines
2.4 KiB
Rust
#![allow(unsafe_code)]
|
|
|
|
use glow::HasContext;
|
|
use std::convert::TryInto;
|
|
|
|
#[derive(Copy, Clone, Debug, PartialEq, Eq)]
|
|
#[allow(dead_code)]
|
|
pub(crate) enum ShaderVersion {
|
|
Gl120,
|
|
Gl140,
|
|
Es100,
|
|
Es300,
|
|
}
|
|
|
|
impl ShaderVersion {
|
|
pub(crate) fn get(gl: &glow::Context) -> Self {
|
|
let shading_lang_string =
|
|
unsafe { gl.get_parameter_string(glow::SHADING_LANGUAGE_VERSION) };
|
|
let shader_version = Self::parse(&shading_lang_string);
|
|
tracing::debug!(
|
|
"Shader version: {:?} ({:?}).",
|
|
shader_version,
|
|
shading_lang_string
|
|
);
|
|
shader_version
|
|
}
|
|
|
|
#[inline]
|
|
pub(crate) fn parse(glsl_ver: &str) -> Self {
|
|
let start = glsl_ver.find(|c| char::is_ascii_digit(&c)).unwrap();
|
|
let es = glsl_ver[..start].contains(" ES ");
|
|
let ver = glsl_ver[start..].splitn(2, ' ').next().unwrap();
|
|
let [maj, min]: [u8; 2] = ver
|
|
.splitn(3, '.')
|
|
.take(2)
|
|
.map(|x| x.parse().unwrap_or_default())
|
|
.collect::<Vec<u8>>()
|
|
.try_into()
|
|
.unwrap();
|
|
if es {
|
|
if maj >= 3 {
|
|
Self::Es300
|
|
} else {
|
|
Self::Es100
|
|
}
|
|
} else if maj > 1 || (maj == 1 && min >= 40) {
|
|
Self::Gl140
|
|
} else {
|
|
Self::Gl120
|
|
}
|
|
}
|
|
|
|
pub(crate) fn version(&self) -> &'static str {
|
|
match self {
|
|
Self::Gl120 => "#version 120\n",
|
|
Self::Gl140 => "#version 140\n",
|
|
Self::Es100 => "#version 100\n",
|
|
Self::Es300 => "#version 300 es\n",
|
|
}
|
|
}
|
|
pub(crate) fn is_new_shader_interface(&self) -> &'static str {
|
|
match self {
|
|
ShaderVersion::Es300 | ShaderVersion::Gl140 => "#define NEW_SHADER_INTERFACE\n",
|
|
_ => "",
|
|
}
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn test_shader_version() {
|
|
use ShaderVersion::{Es100, Es300, Gl120, Gl140};
|
|
for (s, v) in [
|
|
("1.2 OpenGL foo bar", Gl120),
|
|
("3.0", Gl140),
|
|
("0.0", Gl120),
|
|
("OpenGL ES GLSL 3.00 (WebGL2)", Es300),
|
|
("OpenGL ES GLSL 1.00 (WebGL)", Es100),
|
|
("OpenGL ES GLSL ES 1.00 foo bar", Es100),
|
|
("WebGL GLSL ES 3.00 foo bar", Es300),
|
|
("WebGL GLSL ES 3.00", Es300),
|
|
("WebGL GLSL ES 1.0 foo bar", Es100),
|
|
] {
|
|
assert_eq!(ShaderVersion::parse(s), v);
|
|
}
|
|
}
|