1 files changed, 6 insertions, 0 deletions
diff --git a/video/out/opengl/common.h b/video/out/opengl/common.h
index a9e67d9756..a6b02c9366 100644
--- a/video/out/opengl/common.h
+++ b/video/out/opengl/common.h
@@ -59,6 +59,7 @@ enum {
     MPGL_CAP_COMPUTE_SHADER     = (1 << 23),    // GL_ARB_compute_shader & GL_ARB_shader_image_load_store
     MPGL_CAP_NESTED_ARRAY       = (1 << 24),    // GL_ARB_arrays_of_arrays
 
+    MPGL_CAP_SLOW_DR            = (1 << 29),    // direct rendering is assumed to be slow
     MPGL_CAP_SW                 = (1 << 30),    // indirect or sw renderer
 };
 
@@ -87,6 +88,11 @@ struct GL {
     int mpgl_caps;              // Bitfield of MPGL_CAP_* constants
     bool debug_context;         // use of e.g. GLX_CONTEXT_DEBUG_BIT_ARB
 
+    // Set to false if the implementation follows normal GL semantics, which is
+    // upside down. Set to true if it does *not*, i.e. if rendering is right
+    // side up
+    bool flipped;
+
     // Copy of function pointer used to load GL.
     // Caution: Not necessarily valid to use after VO init has completed!
     void *(*get_fn)(void *ctx, const char *n);