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#![deny(clippy::all, clippy::pedantic)]
use std::ffi::CString;
use std::process::abort;
use glutin::context::{NotCurrentContext, PossiblyCurrentContext};
use glutin::display::GetGlDisplay;
use glutin::prelude::{GlDisplay, NotCurrentGlContext, PossiblyCurrentGlContext};
use glutin::surface::{GlSurface, Surface, SurfaceTypeTrait};
pub mod blending;
pub mod buffer;
pub mod data_types;
pub mod debug;
pub mod misc;
pub mod shader;
pub mod texture;
pub mod vertex_array;
pub struct MaybeCurrentContextWithFns
{
context: PossiblyCurrentContext,
fns: Box<sys::Gl>,
}
impl MaybeCurrentContextWithFns
{
/// Returns a new `ContextWithFns`.
///
/// # Errors
/// Returns `Err` if making this context current fails.
pub fn new<SurfaceType: SurfaceTypeTrait>(
context: NotCurrentContext,
surface: &Surface<SurfaceType>,
) -> Result<Self, MakeContextCurrentError>
{
let context = context
.make_current(surface)
.map_err(MakeContextCurrentError)?;
let display = context.display();
let gl = sys::Gl::load_with(|symbol| {
let Ok(symbol) = CString::new(symbol) else {
eprintln!("GL symbol contains nul byte");
abort();
};
display.get_proc_address(&symbol)
});
Ok(Self { context, fns: Box::new(gl) })
}
/// Attempts to make this context & the specified surface current in the calling
/// thread.
///
/// # Errors
/// Returns `Err` if making this context current fails.
pub fn make_current<SurfaceType: SurfaceTypeTrait>(
&self,
surface: &Surface<SurfaceType>,
) -> Result<(), MakeContextCurrentError>
{
if !self.context.is_current() || !surface.is_current(&self.context) {
self.context
.make_current(surface)
.map_err(MakeContextCurrentError)?;
}
Ok(())
}
/// Attempts to make this context current on the calling thread.
///
/// # Errors
/// Returns `Err` if making this context current fails.
pub fn make_current_surfaceless(&self) -> Result<(), MakeContextCurrentError>
{
if !self.context.is_current() {
make_glutin_context_current_surfaceless(&self.context)
.map_err(MakeContextCurrentError)?;
}
Ok(())
}
#[must_use]
pub fn context(&self) -> &PossiblyCurrentContext
{
&self.context
}
#[inline]
pub(crate) fn fns(&self) -> &sys::Gl
{
debug_assert!(self.context.is_current());
&self.fns
}
}
#[derive(Debug, thiserror::Error)]
#[error("Failed to make context current")]
pub struct MakeContextCurrentError(#[source] glutin::error::Error);
fn make_glutin_context_current_surfaceless(
context: &PossiblyCurrentContext,
) -> Result<(), glutin::error::Error>
{
#[cfg(not(any(target_os = "linux", target_os = "windows", target_os = "macos")))]
compile_error!("Unsupported target OS");
match context {
#[cfg(any(target_os = "windows", target_os = "linux"))]
PossiblyCurrentContext::Egl(context) => context.make_current_surfaceless(),
#[cfg(target_os = "linux")]
PossiblyCurrentContext::Glx(context) => context.make_current_surfaceless(),
#[cfg(target_os = "windows")]
PossiblyCurrentContext::Wgl(context) => context.make_current_surfaceless(),
#[cfg(target_os = "macos")]
PossiblyCurrentContext::Cgl(context) => context.make_current_surfaceless(),
}
}
mod sys
{
#![allow(
clippy::missing_safety_doc,
clippy::missing_transmute_annotations,
clippy::too_many_arguments,
clippy::unused_unit,
clippy::upper_case_acronyms,
clippy::doc_markdown,
clippy::unreadable_literal,
unsafe_op_in_unsafe_fn
)]
include!(concat!(env!("OUT_DIR"), "/bindings.rs"));
}
|
