From a4bd80596ed58e65553d425877e625a4a182a026 Mon Sep 17 00:00:00 2001
From: twinaphex <libretro@gmail.com>
Date: Wed, 31 Aug 2016 03:42:58 +0200
Subject: [PATCH] Create dynamic_verify_hw_context - if we request a GL hw
 context and we have  the Vulkan driver running, return false - or vice versa.
 Can now use ffmpeg core with Vulkan

---
 dynamic.c | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/dynamic.c b/dynamic.c
index 20297fa0a2..1c1f739764 100644
--- a/dynamic.c
+++ b/dynamic.c
@@ -893,6 +893,32 @@ static bool dynamic_request_hw_context(enum retro_hw_context_type type,
    return true;
 }
 
+static bool dynamic_verify_hw_context(enum retro_hw_context_type type,
+      unsigned minor, unsigned major)
+{
+   const char *video_ident = video_driver_get_ident();
+
+   switch (type)
+   {
+      case RETRO_HW_CONTEXT_VULKAN:
+         if (!string_is_equal(video_ident, "vulkan"))
+            return false;
+         break;
+      case RETRO_HW_CONTEXT_OPENGLES2:
+      case RETRO_HW_CONTEXT_OPENGLES3:
+      case RETRO_HW_CONTEXT_OPENGLES_VERSION:
+      case RETRO_HW_CONTEXT_OPENGL:
+      case RETRO_HW_CONTEXT_OPENGL_CORE:
+         if (!string_is_equal(video_ident, "gl"))
+            return false;
+         break;
+      default:
+         break;
+   }
+
+   return true;
+}
+
 /**
  * rarch_environment_cb:
  * @cmd                          : Identifier of command.
@@ -1201,6 +1227,9 @@ bool rarch_environment_cb(unsigned cmd, void *data)
          if (!dynamic_request_hw_context(cb->context_type, cb->version_minor, cb->version_major))
             return false;
 
+         if (!dynamic_verify_hw_context(cb->context_type, cb->version_minor, cb->version_major))
+            return false;
+
          cb->get_current_framebuffer = video_driver_get_current_framebuffer;
          cb->get_proc_address        = video_driver_get_proc_address;