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wlr_output_state: Consider buffer uninitialized if not committed

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Alexander Orzechowski 2023-06-12 10:34:32 -04:00 committed by Simon Ser
parent 96f1fdd113
commit b80e67d6e6
1 changed files with 11 additions and 6 deletions
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17
types/output/state.c
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@ -4,11 +4,13 @@
#include "types/wlr_output.h"
void wlr_output_state_finish(struct wlr_output_state *state) {
wlr_buffer_unlock(state->buffer);
// struct wlr_buffer is ref'counted, so the pointer may remain valid after
// wlr_buffer_unlock(). Reset the field to NULL to ensure nobody mistakenly
// reads it after output_state_finish().
state->buffer = NULL;
if (state->committed & WLR_OUTPUT_STATE_BUFFER) {
wlr_buffer_unlock(state->buffer);
// struct wlr_buffer is ref'counted, so the pointer may remain valid after
// wlr_buffer_unlock(). Reset the field to NULL to ensure nobody mistakenly
// reads it after output_state_finish().
state->buffer = NULL;
}
if (state->committed & WLR_OUTPUT_STATE_DAMAGE) {
pixman_region32_fini(&state->damage);
}
@ -71,8 +73,11 @@ void wlr_output_state_set_subpixel(struct wlr_output_state *state,
void wlr_output_state_set_buffer(struct wlr_output_state *state,
struct wlr_buffer *buffer) {
if (state->committed & WLR_OUTPUT_STATE_BUFFER) {
wlr_buffer_unlock(state->buffer);
}
state->committed |= WLR_OUTPUT_STATE_BUFFER;
wlr_buffer_unlock(state->buffer);
state->buffer = wlr_buffer_lock(buffer);
}