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output: add wlr_output_state_init()

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This changes the semantics of wlr_output_state. Instead of having
fields with uninitialized memory when missing from the committed
bitflag, all fields are always initialized (and maybe NULL/empty),
just like we do in wlr_surface_state. This reduces the chances of
footguns when reading a field, and removes the need to check for
the committed bitfield everywhere.

A new wlr_output_state_init() function takes care of initializing
the Pixman region.
This commit is contained in:
Simon Ser 2023-06-22 15:48:35 +02:00 • committed by Alexander Orzechowski
parent 8a5b5e6f28
commit be05097968
19 changed files with 103 additions and 103 deletions
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17
backend/drm/backend.c
View file

@ -121,22 +121,21 @@ static void handle_session_active(struct wl_listener *listener, void *data) {
struct wlr_drm_connector *conn;
wl_list_for_each(conn, &drm->connectors, link) {
struct wlr_output_mode *mode = NULL;
uint32_t committed = WLR_OUTPUT_STATE_ENABLED;
if (conn->status != DRM_MODE_DISCONNECTED && conn->output.enabled
&& conn->output.current_mode != NULL) {
committed |= WLR_OUTPUT_STATE_MODE;
mode = conn->output.current_mode;
}
struct wlr_output_state state = {
.committed = committed,
.allow_artifacts = true,
.enabled = mode != NULL,
.mode_type = WLR_OUTPUT_STATE_MODE_FIXED,
.mode = mode,
};
struct wlr_output_state state;
wlr_output_state_init(&state);
wlr_output_state_set_enabled(&state, mode != NULL);
if (mode != NULL) {
wlr_output_state_set_mode(&state, mode);
}
if (!drm_connector_commit_state(conn, &state)) {
wlr_drm_conn_log(conn, WLR_ERROR, "Failed to restore state after VT switch");
}
wlr_output_state_finish(&state);
}
} else {
wlr_log(WLR_INFO, "DRM fd paused");

9
backend/drm/drm.c
View file

@ -1155,16 +1155,15 @@ static void dealloc_crtc(struct wlr_drm_connector *conn) {
wlr_drm_conn_log(conn, WLR_DEBUG, "De-allocating CRTC %" PRIu32,
conn->crtc->id);
struct wlr_output_state state = {
.committed = WLR_OUTPUT_STATE_ENABLED,
.allow_artifacts = true,
.enabled = false,
};
struct wlr_output_state state;
wlr_output_state_init(&state);
wlr_output_state_set_enabled(&state, false);
if (!drm_connector_commit_state(conn, &state)) {
// On GPU unplug, disabling the CRTC can fail with EPERM
wlr_drm_conn_log(conn, WLR_ERROR, "Failed to disable CRTC %"PRIu32,
conn->crtc->id);
}
wlr_output_state_finish(&state);
}
static void realloc_crtcs(struct wlr_drm_backend *drm,