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Improve shader version selection

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This commit is contained in:
Richard 2021-11-11 01:10:47 -03:00
parent afdf3e799a
commit e31566d430
17 changed files with 179 additions and 69 deletions
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57
glow/src/backend.rs
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@ -3,6 +3,7 @@ use crate::text;
use crate::triangle;
use crate::{Settings, Transformation, Viewport};
use glow::HasContext;
use iced_graphics::backend;
use iced_graphics::font;
use iced_graphics::{Layer, Primitive};
@ -30,8 +31,60 @@ impl Backend {
settings.text_multithreading,
);
let quad_pipeline = quad::Pipeline::new(gl);
let triangle_pipeline = triangle::Pipeline::new(gl);
let version = gl.version();
let shader_version = match (
version.major,
version.minor,
version.is_embedded,
) {
// OpenGL 3.0+
(3, 0 | 1 | 2, false) => (
format!("#version 1{}0", version.minor + 3),
format!(
"#version 1{}0\n#define HIGHER_THAN_300 1",
version.minor + 3
),
),
// OpenGL 3.3+
(3 | 4, _, false) => (
format!("#version {}{}0", version.major, version.minor),
format!(
"#version {}{}0\n#define HIGHER_THAN_300 1",
version.major, version.minor
),
),
// OpenGL ES 3.0+
(3, _, true) => (
format!("#version 3{}0 es", version.minor),
format!(
"#version 3{}0 es\n#define HIGHER_THAN_300 1",
version.minor
),
),
// OpenGL ES 2.0+
(2, _, true) => (
String::from(
"#version 100\n#define in attribute\n#define out varying",
),
String::from("#version 100\n#define in varying"),
),
// OpenGL 2.1
(2, _, false) => (
String::from(
"#version 120\n#define in attribute\n#define out varying",
),
String::from("#version 120\n#define in varying"),
),
// OpenGL 1.1+
_ => panic!("Incompatible context version: {:?}", version),
};
log::info!(
"Shader directive: {}",
shader_version.0.lines().next().unwrap()
);
let quad_pipeline = quad::Pipeline::new(gl, &shader_version);
let triangle_pipeline = triangle::Pipeline::new(gl, &shader_version);
Self {
quad_pipeline,