emersion
7 years ago
parent
664d7bfe4e
commit
ec837e3c9e
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#ifndef WLR_TYPES_WLR_OUTPUT_DAMAGE_H
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#define WLR_TYPES_WLR_OUTPUT_DAMAGE_H
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#include <pixman.h>
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/**
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* Damage tracking requires to keep track of previous frames' damage. To allow
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* damage tracking to work with triple buffering, a history of two frames is
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* required.
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*/
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#define WLR_OUTPUT_DAMAGE_PREVIOUS_LEN 2
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struct wlr_output_damage {
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struct wlr_output *output;
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pixman_region32_t current; // in output-local coordinates
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// circular queue for previous damage
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pixman_region32_t previous[WLR_OUTPUT_DAMAGE_PREVIOUS_LEN];
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size_t previous_idx;
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struct {
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struct wl_signal frame;
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struct wl_signal destroy;
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} events;
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struct wl_listener output_destroy;
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struct wl_listener output_mode;
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struct wl_listener output_needs_swap;
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struct wl_listener output_frame;
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};
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struct wlr_output_damage *wlr_output_damage_create(struct wlr_output *output);
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void wlr_output_damage_destroy(struct wlr_output_damage *output_damage);
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bool wlr_output_damage_make_current(struct wlr_output_damage *output_damage,
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bool *needs_swap, pixman_region32_t *damage);
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bool wlr_output_damage_swap_buffers(struct wlr_output_damage *output_damage,
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struct timespec *when, pixman_region32_t *damage);
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void wlr_output_damage_add(struct wlr_output_damage *output_damage,
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pixman_region32_t *damage);
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void wlr_output_damage_add_whole(struct wlr_output_damage *output_damage);
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void wlr_output_damage_add_box(struct wlr_output_damage *output_damage,
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struct wlr_box *box);
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#endif
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@ -0,0 +1,164 @@
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#include <stdlib.h>
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#include <stddef.h>
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#include <time.h>
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#include <wayland-server.h>
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#include <wlr/types/wlr_box.h>
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#include <wlr/types/wlr_output.h>
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#include <wlr/types/wlr_output_damage.h>
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static void output_handle_destroy(struct wl_listener *listener, void *data) {
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struct wlr_output_damage *output_damage =
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wl_container_of(listener, output_damage, output_destroy);
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wlr_output_damage_destroy(output_damage);
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}
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static void output_handle_mode(struct wl_listener *listener, void *data) {
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struct wlr_output_damage *output_damage =
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wl_container_of(listener, output_damage, output_mode);
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wlr_output_damage_add_whole(output_damage);
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}
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static void output_handle_needs_swap(struct wl_listener *listener, void *data) {
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struct wlr_output_damage *output_damage =
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wl_container_of(listener, output_damage, output_needs_swap);
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pixman_region32_union(&output_damage->current, &output_damage->current,
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&output_damage->output->damage);
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wlr_output_schedule_frame(output_damage->output);
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}
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static void output_handle_frame(struct wl_listener *listener, void *data) {
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struct wlr_output_damage *output_damage =
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wl_container_of(listener, output_damage, output_frame);
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if (!output_damage->output->enabled) {
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return;
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}
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wl_signal_emit(&output_damage->events.frame, output_damage);
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}
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struct wlr_output_damage *wlr_output_damage_create(struct wlr_output *output) {
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struct wlr_output_damage *output_damage =
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calloc(1, sizeof(struct wlr_output_damage));
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if (output_damage == NULL) {
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return NULL;
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}
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output_damage->output = output;
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wl_signal_init(&output_damage->events.frame);
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wl_signal_init(&output_damage->events.destroy);
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pixman_region32_init(&output_damage->current);
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for (size_t i = 0; i < WLR_OUTPUT_DAMAGE_PREVIOUS_LEN; ++i) {
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pixman_region32_init(&output_damage->previous[i]);
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}
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wl_signal_add(&output->events.destroy, &output_damage->output_destroy);
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output_damage->output_destroy.notify = output_handle_destroy;
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wl_signal_add(&output->events.mode, &output_damage->output_mode);
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output_damage->output_mode.notify = output_handle_mode;
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wl_signal_add(&output->events.needs_swap, &output_damage->output_needs_swap);
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output_damage->output_needs_swap.notify = output_handle_needs_swap;
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wl_signal_add(&output->events.frame, &output_damage->output_frame);
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output_damage->output_frame.notify = output_handle_frame;
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return output_damage;
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}
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void wlr_output_damage_destroy(struct wlr_output_damage *output_damage) {
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if (output_damage == NULL) {
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return;
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}
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wl_signal_emit(&output_damage->events.destroy, output_damage);
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wl_list_remove(&output_damage->output_destroy.link);
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wl_list_remove(&output_damage->output_mode.link);
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wl_list_remove(&output_damage->output_needs_swap.link);
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wl_list_remove(&output_damage->output_frame.link);
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pixman_region32_fini(&output_damage->current);
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for (size_t i = 0; i < WLR_OUTPUT_DAMAGE_PREVIOUS_LEN; ++i) {
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pixman_region32_fini(&output_damage->previous[i]);
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}
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free(output_damage);
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}
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bool wlr_output_damage_make_current(struct wlr_output_damage *output_damage,
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bool *needs_swap, pixman_region32_t *damage) {
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struct wlr_output *output = output_damage->output;
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int buffer_age = -1;
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if (!wlr_output_make_current(output, &buffer_age)) {
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return false;
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}
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// Check if we can use damage tracking
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if (buffer_age <= 0 || buffer_age - 1 > WLR_OUTPUT_DAMAGE_PREVIOUS_LEN) {
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int width, height;
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wlr_output_transformed_resolution(output, &width, &height);
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// Buffer new or too old, damage the whole output
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pixman_region32_union_rect(damage, damage, 0, 0, width, height);
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} else {
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pixman_region32_copy(damage, &output_damage->current);
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// Accumulate damage from old buffers
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size_t idx = output_damage->previous_idx;
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for (int i = 0; i < buffer_age - 1; ++i) {
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int j = (idx + i) % WLR_OUTPUT_DAMAGE_PREVIOUS_LEN;
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pixman_region32_union(damage, damage, &output_damage->previous[j]);
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}
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}
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*needs_swap = output->needs_swap || pixman_region32_not_empty(damage);
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return true;
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}
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bool wlr_output_damage_swap_buffers(struct wlr_output_damage *output_damage,
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struct timespec *when, pixman_region32_t *damage) {
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if (!wlr_output_swap_buffers(output_damage->output, when, damage)) {
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return false;
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}
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// same as decrementing, but works on unsigned integers
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output_damage->previous_idx += WLR_OUTPUT_DAMAGE_PREVIOUS_LEN - 1;
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output_damage->previous_idx %= WLR_OUTPUT_DAMAGE_PREVIOUS_LEN;
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pixman_region32_copy(&output_damage->previous[output_damage->previous_idx],
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&output_damage->current);
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pixman_region32_clear(&output_damage->current);
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return true;
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}
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void wlr_output_damage_add(struct wlr_output_damage *output_damage,
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pixman_region32_t *damage) {
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int width, height;
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wlr_output_transformed_resolution(output_damage->output, &width, &height);
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pixman_region32_union(&output_damage->current, &output_damage->current,
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damage);
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pixman_region32_intersect_rect(&output_damage->current,
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&output_damage->current, 0, 0, width, height);
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wlr_output_schedule_frame(output_damage->output);
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}
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void wlr_output_damage_add_whole(struct wlr_output_damage *output_damage) {
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int width, height;
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wlr_output_transformed_resolution(output_damage->output, &width, &height);
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pixman_region32_union_rect(&output_damage->current, &output_damage->current,
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0, 0, width, height);
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wlr_output_schedule_frame(output_damage->output);
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}
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void wlr_output_damage_add_box(struct wlr_output_damage *output_damage,
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struct wlr_box *box) {
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int width, height;
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wlr_output_transformed_resolution(output_damage->output, &width, &height);
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pixman_region32_union_rect(&output_damage->current, &output_damage->current,
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box->x, box->y, box->width, box->height);
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pixman_region32_intersect_rect(&output_damage->current,
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&output_damage->current, 0, 0, width, height);
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wlr_output_schedule_frame(output_damage->output);
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}
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