diff options
| -rw-r--r-- | libmpv/opengl_cb.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/libmpv/opengl_cb.h b/libmpv/opengl_cb.h index bf6dfb4136..0e679e5edf 100644 --- a/libmpv/opengl_cb.h +++ b/libmpv/opengl_cb.h @@ -186,11 +186,14 @@ int mpv_opengl_cb_init_gl(mpv_opengl_cb_context *ctx, const char *exts, * postprocessing, it will always bind and unbind FBOs itself. If * you want mpv to render on the main framebuffer, pass 0. * @param vp Viewport to render on. The renderer will essentially call: - * glViewport(vp[0], vp[1], vp[2], vp[3]); + * glViewport(0, 0, vp[2], vp[3]); * before rendering. The height (vp[3]) can be negative to flip the * image - the renderer will flip it before setting the viewport * (typically you want to flip the image if you are rendering * directly to the main framebuffer). + * vp[0] and vp[1] should be set to 0. + * The viewport width and height imply the target FBO or framebuffer's + * size. It will always render to the full size of it. * @return the number of left frames in the internal queue to be rendered */ int mpv_opengl_cb_render(mpv_opengl_cb_context *ctx, int fbo, int vp[4]); |