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backend/wayland: listen to wl_buffer.release events

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Previously, we just assumed submitting a new frame would make the
compositor release the current one. This isn't always the case, for
instance Sway retains old buffers when a transaction is pending. This
resulted in synchronization issues with clients writing in
front-buffers.

Fix this by un-referencing a wlr_buffer when the parent compositor sends
wl_buffer.release.

Tested by running a fullscreen mpv instance in Sway with the Wayland
backend.
This commit is contained in:
Simon Ser 2020-01-09 15:34:34 +01:00 • committed by Drew DeVault
parent b5cb6de232
commit e6fd880686
2 changed files with 64 additions and 28 deletions
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8
include/backend/wayland.h
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@ -47,6 +47,11 @@ struct wlr_wl_backend {
struct wlr_drm_format_set linux_dmabuf_v1_formats;
};
struct wlr_wl_buffer {
struct wlr_buffer *buffer;
struct wl_buffer *wl_buffer;
};
struct wlr_wl_presentation_feedback {
struct wlr_wl_output *output;
struct wl_list link;
@ -67,8 +72,7 @@ struct wlr_wl_output {
struct zxdg_toplevel_decoration_v1 *zxdg_toplevel_decoration_v1;
struct wl_egl_window *egl_window;
EGLSurface egl_surface;
struct wl_buffer *pending_wl_buffer, *current_wl_buffer;
struct wlr_buffer *current_buffer;
struct wlr_wl_buffer *pending_buffer;
struct wl_list presentation_feedbacks;
uint32_t enter_serial;