aargonian/raw-gl-context
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support config options on linux

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This commit is contained in:
micah
2020-12-20 01:16:19 -05:00
committed by Micah Johnston
parent 1388087097
commit 3403edcc9d
1 changed files with 61 additions and 20 deletions
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81
src/x11.rs
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@@ -6,9 +6,11 @@ use raw_window_handle::{HasRawWindowHandle, RawWindowHandle};
use x11::glx;
use x11::xlib;
use crate::{GlConfig, GlError};
use crate::{GlConfig, GlError, Profile};
type GlXCreateContextAttribsARBProc = unsafe extern "C" fn(
// See https://www.khronos.org/registry/OpenGL/extensions/ARB/GLX_ARB_create_context.txt
type GlXCreateContextAttribsARB = unsafe extern "C" fn(
dpy: *mut xlib::Display,
fbc: glx::GLXFBConfig,
share_context: glx::GLXContext,
@@ -16,6 +18,15 @@ type GlXCreateContextAttribsARBProc = unsafe extern "C" fn(
attribs: *const c_int,
) -> glx::GLXContext;
// See https://www.khronos.org/registry/OpenGL/extensions/EXT/EXT_swap_control.txt
type GlXSwapIntervalEXT =
unsafe extern "C" fn(dpy: *mut xlib::Display, drawable: glx::GLXDrawable, interval: i32);
// See https://www.khronos.org/registry/OpenGL/extensions/ARB/ARB_framebuffer_sRGB.txt
const GLX_FRAMEBUFFER_SRGB_CAPABLE_ARB: i32 = 0x20B2;
fn get_proc_address(symbol: &str) -> *const c_void {
let symbol = CString::new(symbol).unwrap();
unsafe { glx::glXGetProcAddress(symbol.as_ptr() as *const u8).unwrap() as *const c_void }
@@ -48,17 +59,20 @@ impl GlContext {
#[rustfmt::skip]
let fb_attribs = [
glx::GLX_X_RENDERABLE, 1,
glx::GLX_X_RENDERABLE, 1,
glx::GLX_X_VISUAL_TYPE, glx::GLX_TRUE_COLOR,
glx::GLX_DRAWABLE_TYPE, glx::GLX_WINDOW_BIT,
glx::GLX_RENDER_TYPE, glx::GLX_RGBA_BIT,
glx::GLX_RED_SIZE, 8,
glx::GLX_GREEN_SIZE, 8,
glx::GLX_BLUE_SIZE, 8,
glx::GLX_ALPHA_SIZE, 8,
glx::GLX_DEPTH_SIZE, 24,
glx::GLX_STENCIL_SIZE, 8,
glx::GLX_DOUBLEBUFFER, 1,
glx::GLX_RENDER_TYPE, glx::GLX_RGBA_BIT,
glx::GLX_RED_SIZE, config.red_bits as i32,
glx::GLX_GREEN_SIZE, config.green_bits as i32,
glx::GLX_BLUE_SIZE, config.blue_bits as i32,
glx::GLX_ALPHA_SIZE, config.alpha_bits as i32,
glx::GLX_DEPTH_SIZE, config.depth_bits as i32,
glx::GLX_STENCIL_SIZE, config.stencil_bits as i32,
glx::GLX_DOUBLEBUFFER, config.double_buffer as i32,
glx::GLX_SAMPLE_BUFFERS, config.samples.is_some() as i32,
glx::GLX_SAMPLES, config.samples.unwrap_or(0) as i32,
GLX_FRAMEBUFFER_SRGB_CAPABLE_ARB, config.srgb as i32,
0,
];
@@ -70,17 +84,38 @@ impl GlContext {
return Err(GlError::CreationFailed);
}
#[rustfmt::skip]
let ctx_attribs = [
glx::arb::GLX_CONTEXT_MAJOR_VERSION_ARB, 3,
glx::arb::GLX_CONTEXT_MINOR_VERSION_ARB, 2,
glx::arb::GLX_CONTEXT_PROFILE_MASK_ARB, glx::arb::GLX_CONTEXT_CORE_PROFILE_BIT_ARB,
0,
];
#[allow(non_snake_case)]
let glXCreateContextAttribsARB: GlXCreateContextAttribsARB = unsafe {
let addr = get_proc_address("glXCreateContextAttribsARB");
if addr.is_null() {
return Err(GlError::CreationFailed);
} else {
std::mem::transmute(addr)
}
};
#[allow(non_snake_case)]
let glXCreateContextAttribsARB: GlXCreateContextAttribsARBProc =
unsafe { std::mem::transmute(get_proc_address("glXCreateContextAttribsARB")) };
let glXSwapIntervalEXT: GlXSwapIntervalEXT = unsafe {
let addr = get_proc_address("glXSwapIntervalEXT");
if addr.is_null() {
return Err(GlError::CreationFailed);
} else {
std::mem::transmute(addr)
}
};
let profile_mask = match config.profile {
Profile::Core => glx::arb::GLX_CONTEXT_CORE_PROFILE_BIT_ARB,
Profile::Compatibility => glx::arb::GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB,
};
#[rustfmt::skip]
let ctx_attribs = [
glx::arb::GLX_CONTEXT_MAJOR_VERSION_ARB, config.version.0 as i32,
glx::arb::GLX_CONTEXT_MINOR_VERSION_ARB, config.version.1 as i32,
glx::arb::GLX_CONTEXT_PROFILE_MASK_ARB, profile_mask,
0,
];
let context = unsafe {
glXCreateContextAttribsARB(
@@ -96,6 +131,12 @@ impl GlContext {
return Err(GlError::CreationFailed);
}
unsafe {
glx::glXMakeCurrent(display, handle.window, context);
glXSwapIntervalEXT(display, handle.window, config.vsync as i32);
glx::glXMakeCurrent(display, 0, std::ptr::null_mut());
}
Ok(GlContext {
window: handle.window,
display,