[retro-gtk] environment: Support the 'none' HW rendering context

[Adrien Plazas <aplazas src gnome org>]

commit 628797f61c4ab1f946260fe9f35fcd3ed17ea094
Author: Adrien Plazas <kekun plazas laposte net>
Date:   Sun Aug 1 11:39:08 2021 +0200

    environment: Support the 'none' HW rendering context
    
    This supports explicit software rendering requests.

 retro-runner/retro-environment.c | 5 +++++
 1 file changed, 5 insertions(+)
---
diff --git a/retro-runner/retro-environment.c b/retro-runner/retro-environment.c
index c6857c6..9a78b76 100644
--- a/retro-runner/retro-environment.c
+++ b/retro-runner/retro-environment.c
@@ -496,6 +496,11 @@ set_hw_render (RetroCore             *self,
   g_clear_object (&self->renderer);
 
   switch (callback->context_type) {
+  case RETRO_HW_CONTEXT_NONE:
+    retro_debug ("Set hardware render callback: none, use software rendering");
+
+    return TRUE;
+
   case RETRO_HW_CONTEXT_OPENGL:
   case RETRO_HW_CONTEXT_OPENGL_CORE:
   case RETRO_HW_CONTEXT_OPENGLES2: