output: introduce wlr_output_lock_attach_render
This allows screen shooters and screen grabbers to ensure rendering will be used instead of direct scan-out.
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@ -137,6 +137,8 @@ struct wlr_output {
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struct wl_event_source *idle_frame;
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struct wl_event_source *idle_done;
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int attach_render_locks; // number of locks forcing rendering
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struct wl_list cursors; // wlr_output_cursor::link
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struct wlr_output_cursor *hardware_cursor;
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int software_cursor_locks; // number of locks forcing software cursors
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@ -287,6 +289,13 @@ bool wlr_output_set_gamma(struct wlr_output *output, size_t size,
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bool wlr_output_export_dmabuf(struct wlr_output *output,
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struct wlr_dmabuf_attributes *attribs);
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struct wlr_output *wlr_output_from_resource(struct wl_resource *resource);
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/**
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* Locks the output to only use rendering instead of direct scan-out. This is
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* useful if direct scan-out needs to be temporarily disabled (e.g. during
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* screen capture). There must be as many unlocks as there have been locks to
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* restore the original state. There should never be an unlock before a lock.
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*/
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void wlr_output_lock_attach_render(struct wlr_output *output, bool lock);
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/**
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* Locks the output to only use software cursors instead of hardware cursors.
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* This is useful if hardware cursors need to be temporarily disabled (e.g.
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@ -34,6 +34,7 @@ static void frame_destroy(struct wlr_export_dmabuf_frame_v1 *frame) {
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if (frame == NULL) {
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return;
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}
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wlr_output_lock_attach_render(frame->output, false);
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if (frame->cursor_locked) {
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wlr_output_lock_software_cursors(frame->output, false);
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}
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@ -126,6 +127,7 @@ static void manager_handle_capture_output(struct wl_client *client,
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return;
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}
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wlr_output_lock_attach_render(frame->output, true);
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if (overlay_cursor) {
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wlr_output_lock_software_cursors(frame->output, true);
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frame->cursor_locked = true;
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@ -497,6 +497,9 @@ bool wlr_output_attach_buffer(struct wlr_output *output,
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if (!output->impl->attach_buffer) {
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return false;
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}
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if (output->attach_render_locks > 0) {
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return false;
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}
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// If the output has at least one software cursor, refuse to attach the
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// buffer
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@ -614,6 +617,18 @@ struct wlr_output *wlr_output_from_resource(struct wl_resource *resource) {
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return wl_resource_get_user_data(resource);
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}
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void wlr_output_lock_attach_render(struct wlr_output *output, bool lock) {
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if (lock) {
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++output->attach_render_locks;
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} else {
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assert(output->attach_render_locks > 0);
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--output->attach_render_locks;
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}
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wlr_log(WLR_DEBUG, "%s direct scan-out on output '%s' (locks: %d)",
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lock ? "Disabling" : "Enabling", output->name,
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output->attach_render_locks);
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}
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static void output_cursor_damage_whole(struct wlr_output_cursor *cursor);
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void wlr_output_lock_software_cursors(struct wlr_output *output, bool lock) {
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@ -23,6 +23,7 @@ static void frame_destroy(struct wlr_screencopy_frame_v1 *frame) {
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if (frame == NULL) {
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return;
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}
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wlr_output_lock_attach_render(frame->output, false);
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if (frame->cursor_locked) {
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wlr_output_lock_software_cursors(frame->output, false);
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}
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@ -143,6 +144,7 @@ static void frame_handle_copy(struct wl_client *client,
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output->needs_frame = true;
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wlr_output_schedule_frame(output);
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wlr_output_lock_attach_render(output, true);
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if (frame->overlay_cursor) {
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wlr_output_lock_software_cursors(output, true);
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frame->cursor_locked = true;
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