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gfx: Don't crash if there is no graphics metadata.

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This commit is contained in:
Patrick Walton 2014-06-20 17:04:55 -07:00
parent faaf1f9c5a
commit e5276f06e3
1 changed files with 14 additions and 5 deletions
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19
src/components/gfx/render_task.rs
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@ -291,8 +291,6 @@ impl<C:RenderListener + Send> RenderTask<C> {
let render_backend = self.opts.render_backend;
let native_graphics_context = self.compositor.get_graphics_metadata().map(
|md| NativePaintingGraphicsContext::from_metadata(&md));
let native_graphics_context = native_graphics_context.expect("need native graphics context");
let native_graphics_context = Some(native_graphics_context);
let font_ctx_info = FontContextInfo {
backend: self.opts.render_backend,
needs_font_list: false,
@ -309,13 +307,24 @@ impl<C:RenderListener + Send> RenderTask<C> {
let render_data = match render_msg {
WorkerRender(render_data) => render_data,
WorkerUnusedBuffer(buffer) => {
buffer_map.insert(native_graphics_context.get_ref(), buffer);
match native_graphics_context {
None => {}
Some(ref native_graphics_context) => {
buffer_map.insert(native_graphics_context,
buffer);
}
}
continue
}
WorkerExit(tx) => {
// Cleanup and tell the RenderTask we're done
buffer_map.clear(native_graphics_context.get_ref());
drop(native_graphics_context.take_unwrap());
match native_graphics_context {
None => {}
Some(native_graphics_context) => {
buffer_map.clear(
&native_graphics_context);
}
}
tx.send(());
break
}