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Add pref to force WebGL context creation failure

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The pref `webgl.testing.context_creation_error` will cause creation of a new WebGLRenderingContext to fail, iff set to true.
Also update test expectation of `context_creation_error.html` to pass.
This commit is contained in:
Benjamin Dahse 2017-06-06 19:18:40 +02:00
parent 2da8eb0342
commit c034d99880
5 changed files with 10 additions and 8 deletions
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5
components/script/dom/webglrenderingcontext.rs
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@ -51,6 +51,7 @@ use net_traits::image::base::PixelFormat;
use net_traits::image_cache::ImageResponse;
use offscreen_gl_context::{GLContextAttributes, GLLimits};
use script_traits::ScriptMsg as ConstellationMsg;
use servo_config::prefs::PREFS;
use std::cell::Cell;
use std::collections::HashMap;
use webrender_traits;
@ -166,6 +167,10 @@ impl WebGLRenderingContext {
size: Size2D<i32>,
attrs: GLContextAttributes)
-> Result<WebGLRenderingContext, String> {
if let Some(true) = PREFS.get("webgl.testing.context_creation_error").as_boolean() {
return Err("WebGL context creation error forced by pref `webgl.testing.context_creation_error`".into());
}
let (sender, receiver) = ipc::channel().unwrap();
let constellation_chan = window.upcast::<GlobalScope>().constellation_chan();
constellation_chan.send(ConstellationMsg::CreateWebGLPaintThread(size, attrs, sender))