vo_opengl: add ability to render to an arbitrary backing framebuffer

Most of the functionality already exists for the sake of vo_opengl_cb.
We only have to use it.

This will be used by dxinterop in the following commit.

1 files changed, 1 insertions, 0 deletions

diff --git a/video/out/opengl/common.h b/video/out/opengl/common.h
index 7427befe99..71129ac320 100644
--- a/video/out/opengl/common.h
+++ b/video/out/opengl/common.h
@@ -91,6 +91,7 @@ struct GL {
     char *extensions;           // Equivalent to GL_EXTENSIONS
     int mpgl_caps;              // Bitfield of MPGL_CAP_* constants
     bool debug_context;         // use of e.g. GLX_CONTEXT_DEBUG_BIT_ARB
+    GLuint main_fb;             // framebuffer to render to (normally 0)
 
     void (GLAPIENTRY *Viewport)(GLint, GLint, GLsizei, GLsizei);
     void (GLAPIENTRY *Clear)(GLbitfield);