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feature = emscripten, compability fixes for wgpu-native #2450

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Feb 7, 2022
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5 changes: 3 additions & 2 deletions wgpu-hal/examples/raw-gles.rs
Original file line number Diff line number Diff line change
Expand Up @@ -4,8 +4,9 @@
//! Emscripten build:
//! 1. install emsdk
//! 2. build this example with cargo:
//! EMMAKEN_CFLAGS="-g -s ERROR_ON_UNDEFINED_SYMBOLS=0 --no-entry -s FULL_ES3=1" cargo build --example raw-gles --target wasm32-unknown-emscripten --features emscripten,webgl
//! 3. copy raw-gles.em.html into target/wasm32-unknown-emscripten/debug/examples/ and open it in browser
//! EMCC_CFLAGS="-g -s ERROR_ON_UNDEFINED_SYMBOLS=0 --no-entry -s FULL_ES3=1" cargo build --example raw-gles --target wasm32-unknown-emscripten --features emscripten,webgl
//! 3. copy raw-gles.em.html into target directory and open it in browser:
//! cp wgpu-hal/examples/raw-gles.em.html target/wasm32-unknown-emscripten/debug/examples

extern crate wgpu_hal as hal;

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28 changes: 15 additions & 13 deletions wgpu-hal/src/gles/egl.rs
Original file line number Diff line number Diff line change
Expand Up @@ -501,19 +501,21 @@ impl Inner {

// Testing if context can be binded without surface
// and creating dummy pbuffer surface if not.
let pbuffer =
if version >= (1, 5) || display_extensions.contains("EGL_KHR_surfaceless_context") {
log::info!("\tEGL context: +surfaceless");
None
} else {
let attributes = [egl::WIDTH, 1, egl::HEIGHT, 1, egl::NONE];
egl.create_pbuffer_surface(display, config, &attributes)
.map(Some)
.map_err(|e| {
log::warn!("Error in create_pbuffer_surface: {:?}", e);
crate::InstanceError
})?
};
let pbuffer = if version >= (1, 5)
|| display_extensions.contains("EGL_KHR_surfaceless_context")
|| cfg!(feature = "emscripten")
{
log::info!("\tEGL context: +surfaceless");
None
} else {
let attributes = [egl::WIDTH, 1, egl::HEIGHT, 1, egl::NONE];
egl.create_pbuffer_surface(display, config, &attributes)
.map(Some)
.map_err(|e| {
log::warn!("Error in create_pbuffer_surface: {:?}", e);
crate::InstanceError
})?
};

Ok(Self {
egl: EglContext {
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