Add params to video_shader_ctx_init

gfx/drivers/gl.c

@@ -291,6 +291,8 @@ static bool gl_shader_init(gl_t *gl)
       backend = &gl_glsl_backend;
       shader_path = NULL;
    }
+
+   init_data.gl.core_context_enabled = gl->core_context;
 #endif
 #endif
 

gfx/video_shader_driver.c

@@ -137,7 +137,14 @@ bool video_shader_driver_ctl(enum video_shader_driver_ctl_state state, void *dat
             void *tmp = NULL;
 
             if (!init->shader || !init->shader->init)
-               return false;
+            {
+               switch (init->shader_type)
+               {
+                  case RARCH_SHADER_NONE:
+                  default:
+                     return false;
+               }
+            }
 
             tmp = init->shader->init(init->data, init->path);
 

gfx/video_shader_driver.h

@@ -183,7 +183,12 @@ typedef struct shader_backend
 
 typedef struct video_shader_ctx_init
 {
+   enum rarch_shader_type shader_type;
    const shader_backend_t *shader;
+   struct
+   {
+      bool core_context_enabled;
+   } gl;
    void *data;
    const char *path;
 } video_shader_ctx_init_t;