vo_opengl: add a backend start_frame callback for context_vdpau

Might be useful for other backends too. For context_vdpau, resize
handling, presentation, and handling the mapping state becomes somewhat
less awkward.

1 files changed, 6 insertions, 0 deletions

diff --git a/video/out/opengl/context.c b/video/out/opengl/context.c
index 4985c8a326..6fdc123fb6 100644
--- a/video/out/opengl/context.c
+++ b/video/out/opengl/context.c
@@ -240,6 +240,12 @@ int mpgl_control(struct MPGLContext *ctx, int *events, int request, void *arg)
     return ctx->driver->control(ctx, events, request, arg);
 }
 
+void mpgl_start_frame(struct MPGLContext *ctx)
+{
+    if (ctx->driver->start_frame)
+        ctx->driver->start_frame(ctx);
+}
+
 void mpgl_swap_buffers(struct MPGLContext *ctx)
 {
     ctx->driver->swap_buffers(ctx);