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vulkan: implement software rendering

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This commit is contained in:
Julian Orth 2025-07-27 21:03:18 +02:00
parent bb29303c98
commit 0a5ee8fa36
10 changed files with 140 additions and 31 deletions
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26
src/gfx_apis/gl/ext.rs
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@ -3,7 +3,8 @@ use {
RenderError,
egl::sys::{EGL_EXTENSIONS, EGLDisplay},
gl::sys::GL_EXTENSIONS,
sys::{EGL, GLESV2},
proc::ExtProc,
sys::{EGL, EGL_DEVICE_EXT, EGL_TRUE, EGLDeviceEXT, GLESV2},
},
ahash::AHashSet,
bstr::ByteSlice,
@ -53,6 +54,7 @@ bitflags! {
EXT_PLATFORM_BASE = 1 << 1,
KHR_PLATFORM_GBM = 1 << 2,
KHR_DEBUG = 1 << 3,
EXT_DEVICE_QUERY = 1 << 4,
}
pub fn get_client_ext() -> ClientExt {
@ -60,6 +62,7 @@ pub fn get_client_ext() -> ClientExt {
("EGL_EXT_platform_base", EXT_PLATFORM_BASE),
("EGL_KHR_platform_gbm", KHR_PLATFORM_GBM),
("EGL_KHR_debug", KHR_DEBUG),
("EGL_EXT_device_query", EXT_DEVICE_QUERY),
];
match unsafe { get_dpy_extensions(EGLDisplay::none()) } {
Some(exts) => get_typed_ext(&exts, EXT_CLIENT_EXTENSION, &map),
@ -127,3 +130,24 @@ pub fn get_gl_ext() -> Result<GlExt, RenderError> {
_ => Ok(GlExt::none()),
}
}
bitflags! {
DevExt: u32;
MESA_DEVICE_SOFTWARE = 1 << 0,
}
pub fn get_device_ext(procs: &ExtProc, dpy: EGLDisplay) -> Result<DevExt, RenderError> {
let map = [("EGL_MESA_device_software", MESA_DEVICE_SOFTWARE)];
unsafe {
let mut device = 0;
if procs.eglQueryDisplayAttribEXT(dpy, EGL_DEVICE_EXT, &mut device) != EGL_TRUE {
return Err(RenderError::QueryDisplayDevice);
}
let device = EGLDeviceEXT(device as _);
let ext = procs.eglQueryDeviceStringEXT(device, EGL_EXTENSIONS);
match get_extensions(ext) {
Some(exts) => Ok(get_typed_ext(&exts, DevExt::none(), &map)),
_ => Ok(DevExt::none()),
}
}
}