Drew DeVault
7 years ago
committed by
GitHub
commit
3497e53516
@ -0,0 +1,77 @@
|
||||
#ifndef WLR_TYPES_WLR_OUTPUT_DAMAGE_H
|
||||
#define WLR_TYPES_WLR_OUTPUT_DAMAGE_H
|
||||
|
||||
#include <time.h>
|
||||
#include <pixman.h>
|
||||
#include <wlr/types/wlr_output.h>
|
||||
|
||||
/**
|
||||
* Damage tracking requires to keep track of previous frames' damage. To allow
|
||||
* damage tracking to work with triple buffering, a history of two frames is
|
||||
* required.
|
||||
*/
|
||||
#define WLR_OUTPUT_DAMAGE_PREVIOUS_LEN 2
|
||||
|
||||
/**
|
||||
* Tracks damage for an output.
|
||||
*
|
||||
* When a `frame` event is emitted, `wlr_output_damage_make_current` should be
|
||||
* called. If necessary, the output should be repainted and
|
||||
* `wlr_output_damage_swap_buffers` should be called. No rendering should happen
|
||||
* outside a `frame` event handler.
|
||||
*/
|
||||
struct wlr_output_damage {
|
||||
struct wlr_output *output;
|
||||
|
||||
pixman_region32_t current; // in output-local coordinates
|
||||
|
||||
// circular queue for previous damage
|
||||
pixman_region32_t previous[WLR_OUTPUT_DAMAGE_PREVIOUS_LEN];
|
||||
size_t previous_idx;
|
||||
|
||||
struct {
|
||||
struct wl_signal frame;
|
||||
struct wl_signal destroy;
|
||||
} events;
|
||||
|
||||
struct wl_listener output_destroy;
|
||||
struct wl_listener output_mode;
|
||||
struct wl_listener output_transform;
|
||||
struct wl_listener output_scale;
|
||||
struct wl_listener output_needs_swap;
|
||||
struct wl_listener output_frame;
|
||||
};
|
||||
|
||||
struct wlr_output_damage *wlr_output_damage_create(struct wlr_output *output);
|
||||
void wlr_output_damage_destroy(struct wlr_output_damage *output_damage);
|
||||
/**
|
||||
* Makes the output rendering context current. `needs_swap` is set to true if
|
||||
* `wlr_output_damage_swap_buffers` needs to be called. The region of the output
|
||||
* that needs to be repainted is added to `damage`.
|
||||
*/
|
||||
bool wlr_output_damage_make_current(struct wlr_output_damage *output_damage,
|
||||
bool *needs_swap, pixman_region32_t *damage);
|
||||
/**
|
||||
* Swaps the output buffers. If the time of the frame isn't known, set `when` to
|
||||
* NULL.
|
||||
*
|
||||
* Swapping buffers schedules a `frame` event.
|
||||
*/
|
||||
bool wlr_output_damage_swap_buffers(struct wlr_output_damage *output_damage,
|
||||
struct timespec *when, pixman_region32_t *damage);
|
||||
/**
|
||||
* Accumulates damage and schedules a `frame` event.
|
||||
*/
|
||||
void wlr_output_damage_add(struct wlr_output_damage *output_damage,
|
||||
pixman_region32_t *damage);
|
||||
/**
|
||||
* Damages the whole output and schedules a `frame` event.
|
||||
*/
|
||||
void wlr_output_damage_add_whole(struct wlr_output_damage *output_damage);
|
||||
/**
|
||||
* Accumulates damage from a box and schedules a `frame` event.
|
||||
*/
|
||||
void wlr_output_damage_add_box(struct wlr_output_damage *output_damage,
|
||||
struct wlr_box *box);
|
||||
|
||||
#endif
|
||||
@ -0,0 +1,182 @@
|
||||
#include <stdlib.h>
|
||||
#include <stddef.h>
|
||||
#include <time.h>
|
||||
#include <wayland-server.h>
|
||||
#include <wlr/types/wlr_box.h>
|
||||
#include <wlr/types/wlr_output.h>
|
||||
#include <wlr/types/wlr_output_damage.h>
|
||||
|
||||
static void output_handle_destroy(struct wl_listener *listener, void *data) {
|
||||
struct wlr_output_damage *output_damage =
|
||||
wl_container_of(listener, output_damage, output_destroy);
|
||||
wlr_output_damage_destroy(output_damage);
|
||||
}
|
||||
|
||||
static void output_handle_mode(struct wl_listener *listener, void *data) {
|
||||
struct wlr_output_damage *output_damage =
|
||||
wl_container_of(listener, output_damage, output_mode);
|
||||
wlr_output_damage_add_whole(output_damage);
|
||||
}
|
||||
|
||||
static void output_handle_transform(struct wl_listener *listener, void *data) {
|
||||
struct wlr_output_damage *output_damage =
|
||||
wl_container_of(listener, output_damage, output_transform);
|
||||
wlr_output_damage_add_whole(output_damage);
|
||||
}
|
||||
|
||||
static void output_handle_scale(struct wl_listener *listener, void *data) {
|
||||
struct wlr_output_damage *output_damage =
|
||||
wl_container_of(listener, output_damage, output_scale);
|
||||
wlr_output_damage_add_whole(output_damage);
|
||||
}
|
||||
|
||||
static void output_handle_needs_swap(struct wl_listener *listener, void *data) {
|
||||
struct wlr_output_damage *output_damage =
|
||||
wl_container_of(listener, output_damage, output_needs_swap);
|
||||
pixman_region32_union(&output_damage->current, &output_damage->current,
|
||||
&output_damage->output->damage);
|
||||
wlr_output_schedule_frame(output_damage->output);
|
||||
}
|
||||
|
||||
static void output_handle_frame(struct wl_listener *listener, void *data) {
|
||||
struct wlr_output_damage *output_damage =
|
||||
wl_container_of(listener, output_damage, output_frame);
|
||||
|
||||
if (!output_damage->output->enabled) {
|
||||
return;
|
||||
}
|
||||
|
||||
wl_signal_emit(&output_damage->events.frame, output_damage);
|
||||
}
|
||||
|
||||
struct wlr_output_damage *wlr_output_damage_create(struct wlr_output *output) {
|
||||
struct wlr_output_damage *output_damage =
|
||||
calloc(1, sizeof(struct wlr_output_damage));
|
||||
if (output_damage == NULL) {
|
||||
return NULL;
|
||||
}
|
||||
|
||||
output_damage->output = output;
|
||||
wl_signal_init(&output_damage->events.frame);
|
||||
wl_signal_init(&output_damage->events.destroy);
|
||||
|
||||
pixman_region32_init(&output_damage->current);
|
||||
for (size_t i = 0; i < WLR_OUTPUT_DAMAGE_PREVIOUS_LEN; ++i) {
|
||||
pixman_region32_init(&output_damage->previous[i]);
|
||||
}
|
||||
|
||||
wl_signal_add(&output->events.destroy, &output_damage->output_destroy);
|
||||
output_damage->output_destroy.notify = output_handle_destroy;
|
||||
wl_signal_add(&output->events.mode, &output_damage->output_mode);
|
||||
output_damage->output_mode.notify = output_handle_mode;
|
||||
wl_signal_add(&output->events.transform, &output_damage->output_transform);
|
||||
output_damage->output_transform.notify = output_handle_transform;
|
||||
wl_signal_add(&output->events.scale, &output_damage->output_scale);
|
||||
output_damage->output_scale.notify = output_handle_scale;
|
||||
wl_signal_add(&output->events.needs_swap, &output_damage->output_needs_swap);
|
||||
output_damage->output_needs_swap.notify = output_handle_needs_swap;
|
||||
wl_signal_add(&output->events.frame, &output_damage->output_frame);
|
||||
output_damage->output_frame.notify = output_handle_frame;
|
||||
|
||||
return output_damage;
|
||||
}
|
||||
|
||||
void wlr_output_damage_destroy(struct wlr_output_damage *output_damage) {
|
||||
if (output_damage == NULL) {
|
||||
return;
|
||||
}
|
||||
wl_signal_emit(&output_damage->events.destroy, output_damage);
|
||||
wl_list_remove(&output_damage->output_destroy.link);
|
||||
wl_list_remove(&output_damage->output_mode.link);
|
||||
wl_list_remove(&output_damage->output_transform.link);
|
||||
wl_list_remove(&output_damage->output_scale.link);
|
||||
wl_list_remove(&output_damage->output_needs_swap.link);
|
||||
wl_list_remove(&output_damage->output_frame.link);
|
||||
pixman_region32_fini(&output_damage->current);
|
||||
for (size_t i = 0; i < WLR_OUTPUT_DAMAGE_PREVIOUS_LEN; ++i) {
|
||||
pixman_region32_fini(&output_damage->previous[i]);
|
||||
}
|
||||
free(output_damage);
|
||||
}
|
||||
|
||||
bool wlr_output_damage_make_current(struct wlr_output_damage *output_damage,
|
||||
bool *needs_swap, pixman_region32_t *damage) {
|
||||
struct wlr_output *output = output_damage->output;
|
||||
|
||||
int buffer_age = -1;
|
||||
if (!wlr_output_make_current(output, &buffer_age)) {
|
||||
return false;
|
||||
}
|
||||
|
||||
// Check if we can use damage tracking
|
||||
if (buffer_age <= 0 || buffer_age - 1 > WLR_OUTPUT_DAMAGE_PREVIOUS_LEN) {
|
||||
int width, height;
|
||||
wlr_output_transformed_resolution(output, &width, &height);
|
||||
|
||||
// Buffer new or too old, damage the whole output
|
||||
pixman_region32_union_rect(damage, damage, 0, 0, width, height);
|
||||
} else {
|
||||
pixman_region32_copy(damage, &output_damage->current);
|
||||
|
||||
// Accumulate damage from old buffers
|
||||
size_t idx = output_damage->previous_idx;
|
||||
for (int i = 0; i < buffer_age - 1; ++i) {
|
||||
int j = (idx + i) % WLR_OUTPUT_DAMAGE_PREVIOUS_LEN;
|
||||
pixman_region32_union(damage, damage, &output_damage->previous[j]);
|
||||
}
|
||||
}
|
||||
|
||||
*needs_swap = output->needs_swap || pixman_region32_not_empty(damage);
|
||||
return true;
|
||||
}
|
||||
|
||||
bool wlr_output_damage_swap_buffers(struct wlr_output_damage *output_damage,
|
||||
struct timespec *when, pixman_region32_t *damage) {
|
||||
if (!wlr_output_swap_buffers(output_damage->output, when, damage)) {
|
||||
return false;
|
||||
}
|
||||
|
||||
// same as decrementing, but works on unsigned integers
|
||||
output_damage->previous_idx += WLR_OUTPUT_DAMAGE_PREVIOUS_LEN - 1;
|
||||
output_damage->previous_idx %= WLR_OUTPUT_DAMAGE_PREVIOUS_LEN;
|
||||
|
||||
pixman_region32_copy(&output_damage->previous[output_damage->previous_idx],
|
||||
&output_damage->current);
|
||||
pixman_region32_clear(&output_damage->current);
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
void wlr_output_damage_add(struct wlr_output_damage *output_damage,
|
||||
pixman_region32_t *damage) {
|
||||
int width, height;
|
||||
wlr_output_transformed_resolution(output_damage->output, &width, &height);
|
||||
|
||||
pixman_region32_union(&output_damage->current, &output_damage->current,
|
||||
damage);
|
||||
pixman_region32_intersect_rect(&output_damage->current,
|
||||
&output_damage->current, 0, 0, width, height);
|
||||
wlr_output_schedule_frame(output_damage->output);
|
||||
}
|
||||
|
||||
void wlr_output_damage_add_whole(struct wlr_output_damage *output_damage) {
|
||||
int width, height;
|
||||
wlr_output_transformed_resolution(output_damage->output, &width, &height);
|
||||
|
||||
pixman_region32_union_rect(&output_damage->current, &output_damage->current,
|
||||
0, 0, width, height);
|
||||
|
||||
wlr_output_schedule_frame(output_damage->output);
|
||||
}
|
||||
|
||||
void wlr_output_damage_add_box(struct wlr_output_damage *output_damage,
|
||||
struct wlr_box *box) {
|
||||
int width, height;
|
||||
wlr_output_transformed_resolution(output_damage->output, &width, &height);
|
||||
|
||||
pixman_region32_union_rect(&output_damage->current, &output_damage->current,
|
||||
box->x, box->y, box->width, box->height);
|
||||
pixman_region32_intersect_rect(&output_damage->current,
|
||||
&output_damage->current, 0, 0, width, height);
|
||||
wlr_output_schedule_frame(output_damage->output);
|
||||
}
|
||||
Loading…
Reference in new issue