wlroots-hyprland/types/wlr_output.c
Simon Ser e0bbafc253 output: replace wlr_output.damage with a damage event
This patch disambiguates the needs_frame event by uncoupling it from
damage. A new separate damage event is emitted when the backend damages
the output (this happens e.g. VT is changed or software cursors are
used). The event specifies the damaged region.

The wlr_output.damage field is removed. wlr_output is no longer
responsible for tracking its own damage, this is wlr_output_damage's
job.

This is a breaking change, but wlr_output_damage users shouldn't need an
update.

Bugs fixed:

- Screen flashes on VT switch
- Cursor damage issues on the X11 and headless backends

Closes: https://github.com/swaywm/sway/issues/5086
2020-03-12 22:47:59 +01:00

1166 lines
33 KiB
C

#define _POSIX_C_SOURCE 200809L
#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include <tgmath.h>
#include <time.h>
#include <wayland-server-core.h>
#include <wlr/interfaces/wlr_output.h>
#include <wlr/render/interface.h>
#include <wlr/render/wlr_renderer.h>
#include <wlr/types/wlr_box.h>
#include <wlr/types/wlr_matrix.h>
#include <wlr/types/wlr_output.h>
#include <wlr/types/wlr_seat.h>
#include <wlr/types/wlr_surface.h>
#include <wlr/util/log.h>
#include <wlr/util/region.h>
#include "util/global.h"
#include "util/signal.h"
#define OUTPUT_VERSION 3
static void send_geometry(struct wl_resource *resource) {
struct wlr_output *output = wlr_output_from_resource(resource);
wl_output_send_geometry(resource, 0, 0,
output->phys_width, output->phys_height, output->subpixel,
output->make, output->model, output->transform);
}
static void send_current_mode(struct wl_resource *resource) {
struct wlr_output *output = wlr_output_from_resource(resource);
if (output->current_mode != NULL) {
struct wlr_output_mode *mode = output->current_mode;
wl_output_send_mode(resource, WL_OUTPUT_MODE_CURRENT,
mode->width, mode->height, mode->refresh);
} else {
// Output has no mode
wl_output_send_mode(resource, WL_OUTPUT_MODE_CURRENT, output->width,
output->height, output->refresh);
}
}
static void send_scale(struct wl_resource *resource) {
struct wlr_output *output = wlr_output_from_resource(resource);
uint32_t version = wl_resource_get_version(resource);
if (version >= WL_OUTPUT_SCALE_SINCE_VERSION) {
wl_output_send_scale(resource, (uint32_t)ceil(output->scale));
}
}
static void send_done(struct wl_resource *resource) {
uint32_t version = wl_resource_get_version(resource);
if (version >= WL_OUTPUT_DONE_SINCE_VERSION) {
wl_output_send_done(resource);
}
}
static void output_handle_resource_destroy(struct wl_resource *resource) {
wl_list_remove(wl_resource_get_link(resource));
}
static void output_handle_release(struct wl_client *client,
struct wl_resource *resource) {
wl_resource_destroy(resource);
}
static const struct wl_output_interface output_impl = {
.release = output_handle_release,
};
static void output_bind(struct wl_client *wl_client, void *data,
uint32_t version, uint32_t id) {
// `output` can be NULL if the output global is being destroyed
struct wlr_output *output = data;
struct wl_resource *resource = wl_resource_create(wl_client,
&wl_output_interface, version, id);
if (resource == NULL) {
wl_client_post_no_memory(wl_client);
return;
}
wl_resource_set_implementation(resource, &output_impl, output,
output_handle_resource_destroy);
if (output == NULL) {
wl_list_init(wl_resource_get_link(resource));
return;
}
wl_list_insert(&output->resources, wl_resource_get_link(resource));
send_geometry(resource);
send_current_mode(resource);
send_scale(resource);
send_done(resource);
}
void wlr_output_create_global(struct wlr_output *output) {
if (output->global != NULL) {
return;
}
output->global = wl_global_create(output->display,
&wl_output_interface, OUTPUT_VERSION, output, output_bind);
if (output->global == NULL) {
wlr_log(WLR_ERROR, "Failed to allocate wl_output global");
}
}
void wlr_output_destroy_global(struct wlr_output *output) {
if (output->global == NULL) {
return;
}
// Make all output resources inert
struct wl_resource *resource, *tmp;
wl_resource_for_each_safe(resource, tmp, &output->resources) {
wl_resource_set_user_data(resource, NULL);
wl_list_remove(wl_resource_get_link(resource));
wl_list_init(wl_resource_get_link(resource));
}
wlr_global_destroy_safe(output->global, output->display);
output->global = NULL;
}
void wlr_output_update_enabled(struct wlr_output *output, bool enabled) {
if (output->enabled == enabled) {
return;
}
output->enabled = enabled;
wlr_signal_emit_safe(&output->events.enable, output);
}
static void output_update_matrix(struct wlr_output *output) {
wlr_matrix_projection(output->transform_matrix, output->width,
output->height, output->transform);
}
void wlr_output_enable(struct wlr_output *output, bool enable) {
if (output->enabled == enable) {
output->pending.committed &= ~WLR_OUTPUT_STATE_ENABLED;
return;
}
output->pending.committed |= WLR_OUTPUT_STATE_ENABLED;
output->pending.enabled = enable;
}
static void output_state_clear_mode(struct wlr_output_state *state) {
if (!(state->committed & WLR_OUTPUT_STATE_MODE)) {
return;
}
state->mode = NULL;
state->committed &= ~WLR_OUTPUT_STATE_MODE;
}
void wlr_output_set_mode(struct wlr_output *output,
struct wlr_output_mode *mode) {
output_state_clear_mode(&output->pending);
if (output->current_mode == mode) {
return;
}
output->pending.committed |= WLR_OUTPUT_STATE_MODE;
output->pending.mode_type = WLR_OUTPUT_STATE_MODE_FIXED;
output->pending.mode = mode;
}
void wlr_output_set_custom_mode(struct wlr_output *output, int32_t width,
int32_t height, int32_t refresh) {
output_state_clear_mode(&output->pending);
if (output->width == width && output->height == height &&
output->refresh == refresh) {
return;
}
output->pending.committed |= WLR_OUTPUT_STATE_MODE;
output->pending.mode_type = WLR_OUTPUT_STATE_MODE_CUSTOM;
output->pending.custom_mode.width = width;
output->pending.custom_mode.height = height;
output->pending.custom_mode.refresh = refresh;
}
void wlr_output_update_mode(struct wlr_output *output,
struct wlr_output_mode *mode) {
output->current_mode = mode;
if (mode != NULL) {
wlr_output_update_custom_mode(output, mode->width, mode->height,
mode->refresh);
} else {
wlr_output_update_custom_mode(output, 0, 0, 0);
}
}
void wlr_output_update_custom_mode(struct wlr_output *output, int32_t width,
int32_t height, int32_t refresh) {
if (output->width == width && output->height == height &&
output->refresh == refresh) {
return;
}
output->width = width;
output->height = height;
output_update_matrix(output);
output->refresh = refresh;
struct wl_resource *resource;
wl_resource_for_each(resource, &output->resources) {
send_current_mode(resource);
}
wlr_output_schedule_done(output);
wlr_signal_emit_safe(&output->events.mode, output);
}
void wlr_output_set_transform(struct wlr_output *output,
enum wl_output_transform transform) {
if (output->transform == transform) {
output->pending.committed &= ~WLR_OUTPUT_STATE_TRANSFORM;
return;
}
output->pending.committed |= WLR_OUTPUT_STATE_TRANSFORM;
output->pending.transform = transform;
}
void wlr_output_set_scale(struct wlr_output *output, float scale) {
if (output->scale == scale) {
output->pending.committed &= ~WLR_OUTPUT_STATE_SCALE;
return;
}
output->pending.committed |= WLR_OUTPUT_STATE_SCALE;
output->pending.scale = scale;
}
void wlr_output_enable_adaptive_sync(struct wlr_output *output, bool enabled) {
bool currently_enabled =
output->adaptive_sync_status != WLR_OUTPUT_ADAPTIVE_SYNC_DISABLED;
if (currently_enabled == enabled) {
output->pending.committed &= ~WLR_OUTPUT_STATE_ADAPTIVE_SYNC_ENABLED;
return;
}
output->pending.committed |= WLR_OUTPUT_STATE_ADAPTIVE_SYNC_ENABLED;
output->pending.adaptive_sync_enabled = enabled;
}
void wlr_output_set_subpixel(struct wlr_output *output,
enum wl_output_subpixel subpixel) {
if (output->subpixel == subpixel) {
return;
}
output->subpixel = subpixel;
struct wl_resource *resource;
wl_resource_for_each(resource, &output->resources) {
send_geometry(resource);
}
wlr_output_schedule_done(output);
}
void wlr_output_set_description(struct wlr_output *output, const char *desc) {
if (output->description != NULL && desc != NULL &&
strcmp(output->description, desc) == 0) {
return;
}
free(output->description);
if (desc != NULL) {
output->description = strdup(desc);
} else {
output->description = NULL;
}
wlr_signal_emit_safe(&output->events.description, output);
}
static void schedule_done_handle_idle_timer(void *data) {
struct wlr_output *output = data;
output->idle_done = NULL;
struct wl_resource *resource;
wl_resource_for_each(resource, &output->resources) {
uint32_t version = wl_resource_get_version(resource);
if (version >= WL_OUTPUT_DONE_SINCE_VERSION) {
wl_output_send_done(resource);
}
}
}
void wlr_output_schedule_done(struct wlr_output *output) {
if (output->idle_done != NULL) {
return; // Already scheduled
}
struct wl_event_loop *ev = wl_display_get_event_loop(output->display);
output->idle_done =
wl_event_loop_add_idle(ev, schedule_done_handle_idle_timer, output);
}
static void handle_display_destroy(struct wl_listener *listener, void *data) {
struct wlr_output *output =
wl_container_of(listener, output, display_destroy);
wlr_output_destroy_global(output);
}
void wlr_output_init(struct wlr_output *output, struct wlr_backend *backend,
const struct wlr_output_impl *impl, struct wl_display *display) {
assert(impl->attach_render && impl->commit);
if (impl->set_cursor || impl->move_cursor) {
assert(impl->set_cursor && impl->move_cursor);
}
output->backend = backend;
output->impl = impl;
output->display = display;
wl_list_init(&output->modes);
output->transform = WL_OUTPUT_TRANSFORM_NORMAL;
output->scale = 1;
output->commit_seq = 0;
wl_list_init(&output->cursors);
wl_list_init(&output->resources);
wl_signal_init(&output->events.frame);
wl_signal_init(&output->events.damage);
wl_signal_init(&output->events.needs_frame);
wl_signal_init(&output->events.precommit);
wl_signal_init(&output->events.commit);
wl_signal_init(&output->events.present);
wl_signal_init(&output->events.enable);
wl_signal_init(&output->events.mode);
wl_signal_init(&output->events.scale);
wl_signal_init(&output->events.transform);
wl_signal_init(&output->events.description);
wl_signal_init(&output->events.destroy);
pixman_region32_init(&output->pending.damage);
const char *no_hardware_cursors = getenv("WLR_NO_HARDWARE_CURSORS");
if (no_hardware_cursors != NULL && strcmp(no_hardware_cursors, "1") == 0) {
wlr_log(WLR_DEBUG,
"WLR_NO_HARDWARE_CURSORS set, forcing software cursors");
output->software_cursor_locks = 1;
}
output->display_destroy.notify = handle_display_destroy;
wl_display_add_destroy_listener(display, &output->display_destroy);
output->frame_pending = true;
}
void wlr_output_destroy(struct wlr_output *output) {
if (!output) {
return;
}
wl_list_remove(&output->display_destroy.link);
wlr_output_destroy_global(output);
wlr_signal_emit_safe(&output->events.destroy, output);
// The backend is responsible for free-ing the list of modes
struct wlr_output_cursor *cursor, *tmp_cursor;
wl_list_for_each_safe(cursor, tmp_cursor, &output->cursors, link) {
wlr_output_cursor_destroy(cursor);
}
if (output->idle_frame != NULL) {
wl_event_source_remove(output->idle_frame);
}
if (output->idle_done != NULL) {
wl_event_source_remove(output->idle_done);
}
free(output->description);
pixman_region32_fini(&output->pending.damage);
if (output->impl && output->impl->destroy) {
output->impl->destroy(output);
} else {
free(output);
}
}
void wlr_output_transformed_resolution(struct wlr_output *output,
int *width, int *height) {
if (output->transform % 2 == 0) {
*width = output->width;
*height = output->height;
} else {
*width = output->height;
*height = output->width;
}
}
void wlr_output_effective_resolution(struct wlr_output *output,
int *width, int *height) {
wlr_output_transformed_resolution(output, width, height);
*width /= output->scale;
*height /= output->scale;
}
struct wlr_output_mode *wlr_output_preferred_mode(struct wlr_output *output) {
if (wl_list_empty(&output->modes)) {
return NULL;
}
struct wlr_output_mode *mode;
wl_list_for_each(mode, &output->modes, link) {
if (mode->preferred) {
return mode;
}
}
// No preferred mode, choose the last one
return wl_container_of(output->modes.prev, mode, link);
}
static void output_state_clear_buffer(struct wlr_output_state *state) {
if (!(state->committed & WLR_OUTPUT_STATE_BUFFER)) {
return;
}
wlr_buffer_unref(state->buffer);
state->buffer = NULL;
state->committed &= ~WLR_OUTPUT_STATE_BUFFER;
}
bool wlr_output_attach_render(struct wlr_output *output, int *buffer_age) {
if (!output->impl->attach_render(output, buffer_age)) {
return false;
}
output_state_clear_buffer(&output->pending);
output->pending.committed |= WLR_OUTPUT_STATE_BUFFER;
output->pending.buffer_type = WLR_OUTPUT_STATE_BUFFER_RENDER;
return true;
}
bool wlr_output_preferred_read_format(struct wlr_output *output,
enum wl_shm_format *fmt) {
if (!output->impl->attach_render(output, NULL)) {
return false;
}
struct wlr_renderer *renderer = wlr_backend_get_renderer(output->backend);
if (!renderer->impl->preferred_read_format || !renderer->impl->read_pixels) {
return false;
}
*fmt = renderer->impl->preferred_read_format(renderer);
return true;
}
void wlr_output_set_damage(struct wlr_output *output,
pixman_region32_t *damage) {
pixman_region32_intersect_rect(&output->pending.damage, damage,
0, 0, output->width, output->height);
output->pending.committed |= WLR_OUTPUT_STATE_DAMAGE;
}
static void output_state_clear(struct wlr_output_state *state) {
output_state_clear_buffer(state);
pixman_region32_clear(&state->damage);
state->committed = 0;
}
bool wlr_output_commit(struct wlr_output *output) {
if (output->pending.committed & WLR_OUTPUT_STATE_BUFFER) {
if (output->frame_pending) {
wlr_log(WLR_ERROR, "Tried to commit a buffer while a frame is pending");
goto error;
}
if (output->idle_frame != NULL) {
wl_event_source_remove(output->idle_frame);
output->idle_frame = NULL;
}
}
bool enabled = output->enabled;
if (output->pending.committed & WLR_OUTPUT_STATE_ENABLED) {
enabled = output->pending.enabled;
}
if (!enabled && output->pending.committed & WLR_OUTPUT_STATE_BUFFER) {
wlr_log(WLR_ERROR, "Tried to commit a buffer on a disabled output");
goto error;
}
if (!enabled && output->pending.committed & WLR_OUTPUT_STATE_MODE) {
wlr_log(WLR_ERROR, "Tried to modeset a disabled output");
goto error;
}
if (!enabled && output->pending.committed & WLR_OUTPUT_STATE_ADAPTIVE_SYNC_ENABLED) {
wlr_log(WLR_ERROR, "Tried to enable adaptive sync on a disabled output");
goto error;
}
struct timespec now;
clock_gettime(CLOCK_MONOTONIC, &now);
struct wlr_output_event_precommit event = {
.output = output,
.when = &now,
};
wlr_signal_emit_safe(&output->events.precommit, &event);
if (!output->impl->commit(output)) {
output_state_clear(&output->pending);
return false;
}
if (output->pending.committed & WLR_OUTPUT_STATE_BUFFER) {
struct wlr_output_cursor *cursor;
wl_list_for_each(cursor, &output->cursors, link) {
if (!cursor->enabled || !cursor->visible || cursor->surface == NULL) {
continue;
}
wlr_surface_send_frame_done(cursor->surface, &now);
}
}
output->commit_seq++;
wlr_signal_emit_safe(&output->events.commit, output);
bool scale_updated = output->pending.committed & WLR_OUTPUT_STATE_SCALE;
if (scale_updated) {
output->scale = output->pending.scale;
wlr_signal_emit_safe(&output->events.scale, output);
}
if (output->pending.committed & WLR_OUTPUT_STATE_TRANSFORM) {
output->transform = output->pending.transform;
output_update_matrix(output);
wlr_signal_emit_safe(&output->events.transform, output);
}
bool geometry_updated = output->pending.committed &
(WLR_OUTPUT_STATE_MODE | WLR_OUTPUT_STATE_TRANSFORM);
if (geometry_updated || scale_updated) {
struct wl_resource *resource;
wl_resource_for_each(resource, &output->resources) {
if (geometry_updated) {
send_geometry(resource);
}
if (scale_updated) {
send_scale(resource);
}
}
wlr_output_schedule_done(output);
}
if (output->pending.committed & WLR_OUTPUT_STATE_BUFFER) {
output->frame_pending = true;
output->needs_frame = false;
}
output_state_clear(&output->pending);
return true;
error:
output_state_clear(&output->pending);
return false;
}
void wlr_output_rollback(struct wlr_output *output) {
output_state_clear(&output->pending);
}
bool wlr_output_attach_buffer(struct wlr_output *output,
struct wlr_buffer *buffer) {
if (!output->impl->attach_buffer) {
return false;
}
if (output->attach_render_locks > 0) {
return false;
}
// If the output has at least one software cursor, refuse to attach the
// buffer
struct wlr_output_cursor *cursor;
wl_list_for_each(cursor, &output->cursors, link) {
if (cursor->enabled && cursor->visible &&
cursor != output->hardware_cursor) {
return false;
}
}
if (!output->impl->attach_buffer(output, buffer)) {
return false;
}
output_state_clear_buffer(&output->pending);
output->pending.committed |= WLR_OUTPUT_STATE_BUFFER;
output->pending.buffer_type = WLR_OUTPUT_STATE_BUFFER_SCANOUT;
output->pending.buffer = wlr_buffer_ref(buffer);
return true;
}
void wlr_output_send_frame(struct wlr_output *output) {
output->frame_pending = false;
wlr_signal_emit_safe(&output->events.frame, output);
}
static void schedule_frame_handle_idle_timer(void *data) {
struct wlr_output *output = data;
output->idle_frame = NULL;
if (!output->frame_pending) {
wlr_output_send_frame(output);
}
}
void wlr_output_schedule_frame(struct wlr_output *output) {
// Make sure the compositor commits a new frame. This is necessary to make
// clients which ask for frame callbacks without submitting a new buffer
// work.
wlr_output_update_needs_frame(output);
if (output->frame_pending || output->idle_frame != NULL) {
return;
}
// We're using an idle timer here in case a buffer swap happens right after
// this function is called
struct wl_event_loop *ev = wl_display_get_event_loop(output->display);
output->idle_frame =
wl_event_loop_add_idle(ev, schedule_frame_handle_idle_timer, output);
}
void wlr_output_send_present(struct wlr_output *output,
struct wlr_output_event_present *event) {
struct wlr_output_event_present _event = {0};
if (event == NULL) {
event = &_event;
event->commit_seq = output->commit_seq + 1;
}
event->output = output;
struct timespec now;
if (event->when == NULL) {
clockid_t clock = wlr_backend_get_presentation_clock(output->backend);
errno = 0;
if (clock_gettime(clock, &now) != 0) {
wlr_log_errno(WLR_ERROR, "failed to send output present event: "
"failed to read clock");
return;
}
event->when = &now;
}
wlr_signal_emit_safe(&output->events.present, event);
}
bool wlr_output_set_gamma(struct wlr_output *output, size_t size,
const uint16_t *r, const uint16_t *g, const uint16_t *b) {
if (!output->impl->set_gamma) {
return false;
}
return output->impl->set_gamma(output, size, r, g, b);
}
size_t wlr_output_get_gamma_size(struct wlr_output *output) {
if (!output->impl->get_gamma_size) {
return 0;
}
return output->impl->get_gamma_size(output);
}
bool wlr_output_export_dmabuf(struct wlr_output *output,
struct wlr_dmabuf_attributes *attribs) {
if (!output->impl->export_dmabuf) {
return false;
}
return output->impl->export_dmabuf(output, attribs);
}
void wlr_output_update_needs_frame(struct wlr_output *output) {
if (output->needs_frame) {
return;
}
output->needs_frame = true;
wlr_signal_emit_safe(&output->events.needs_frame, output);
}
void wlr_output_damage_whole(struct wlr_output *output) {
int width, height;
wlr_output_transformed_resolution(output, &width, &height);
pixman_region32_t damage;
pixman_region32_init_rect(&damage, 0, 0, width, height);
struct wlr_output_event_damage event = {
.output = output,
.damage = &damage,
};
wlr_signal_emit_safe(&output->events.damage, &event);
pixman_region32_fini(&damage);
}
struct wlr_output *wlr_output_from_resource(struct wl_resource *resource) {
assert(wl_resource_instance_of(resource, &wl_output_interface,
&output_impl));
return wl_resource_get_user_data(resource);
}
void wlr_output_lock_attach_render(struct wlr_output *output, bool lock) {
if (lock) {
++output->attach_render_locks;
} else {
assert(output->attach_render_locks > 0);
--output->attach_render_locks;
}
wlr_log(WLR_DEBUG, "%s direct scan-out on output '%s' (locks: %d)",
lock ? "Disabling" : "Enabling", output->name,
output->attach_render_locks);
}
static void output_cursor_damage_whole(struct wlr_output_cursor *cursor);
void wlr_output_lock_software_cursors(struct wlr_output *output, bool lock) {
if (lock) {
++output->software_cursor_locks;
} else {
assert(output->software_cursor_locks > 0);
--output->software_cursor_locks;
}
wlr_log(WLR_DEBUG, "%s hardware cursors on output '%s' (locks: %d)",
lock ? "Disabling" : "Enabling", output->name,
output->software_cursor_locks);
if (output->software_cursor_locks > 0 && output->hardware_cursor != NULL) {
assert(output->impl->set_cursor);
output->impl->set_cursor(output, NULL, 1,
WL_OUTPUT_TRANSFORM_NORMAL, 0, 0, true);
output_cursor_damage_whole(output->hardware_cursor);
output->hardware_cursor = NULL;
}
// If it's possible to use hardware cursors again, don't switch immediately
// since a recorder is likely to lock software cursors for the next frame
// again.
}
static void output_scissor(struct wlr_output *output, pixman_box32_t *rect) {
struct wlr_renderer *renderer = wlr_backend_get_renderer(output->backend);
assert(renderer);
struct wlr_box box = {
.x = rect->x1,
.y = rect->y1,
.width = rect->x2 - rect->x1,
.height = rect->y2 - rect->y1,
};
int ow, oh;
wlr_output_transformed_resolution(output, &ow, &oh);
enum wl_output_transform transform =
wlr_output_transform_invert(output->transform);
wlr_box_transform(&box, &box, transform, ow, oh);
wlr_renderer_scissor(renderer, &box);
}
static void output_cursor_get_box(struct wlr_output_cursor *cursor,
struct wlr_box *box);
static void output_cursor_render(struct wlr_output_cursor *cursor,
pixman_region32_t *damage) {
struct wlr_renderer *renderer =
wlr_backend_get_renderer(cursor->output->backend);
assert(renderer);
struct wlr_texture *texture = cursor->texture;
if (cursor->surface != NULL) {
texture = wlr_surface_get_texture(cursor->surface);
}
if (texture == NULL) {
return;
}
struct wlr_box box;
output_cursor_get_box(cursor, &box);
pixman_region32_t surface_damage;
pixman_region32_init(&surface_damage);
pixman_region32_union_rect(&surface_damage, &surface_damage, box.x, box.y,
box.width, box.height);
pixman_region32_intersect(&surface_damage, &surface_damage, damage);
if (!pixman_region32_not_empty(&surface_damage)) {
goto surface_damage_finish;
}
float matrix[9];
wlr_matrix_project_box(matrix, &box, WL_OUTPUT_TRANSFORM_NORMAL, 0,
cursor->output->transform_matrix);
int nrects;
pixman_box32_t *rects = pixman_region32_rectangles(&surface_damage, &nrects);
for (int i = 0; i < nrects; ++i) {
output_scissor(cursor->output, &rects[i]);
wlr_render_texture_with_matrix(renderer, texture, matrix, 1.0f);
}
wlr_renderer_scissor(renderer, NULL);
surface_damage_finish:
pixman_region32_fini(&surface_damage);
}
void wlr_output_render_software_cursors(struct wlr_output *output,
pixman_region32_t *damage) {
int width, height;
wlr_output_transformed_resolution(output, &width, &height);
pixman_region32_t render_damage;
pixman_region32_init(&render_damage);
pixman_region32_union_rect(&render_damage, &render_damage, 0, 0,
width, height);
if (damage != NULL) {
// Damage tracking supported
pixman_region32_intersect(&render_damage, &render_damage, damage);
}
if (pixman_region32_not_empty(&render_damage)) {
struct wlr_output_cursor *cursor;
wl_list_for_each(cursor, &output->cursors, link) {
if (!cursor->enabled || !cursor->visible ||
output->hardware_cursor == cursor) {
continue;
}
output_cursor_render(cursor, &render_damage);
}
}
pixman_region32_fini(&render_damage);
}
/**
* Returns the cursor box, scaled for its output.
*/
static void output_cursor_get_box(struct wlr_output_cursor *cursor,
struct wlr_box *box) {
box->x = cursor->x - cursor->hotspot_x;
box->y = cursor->y - cursor->hotspot_y;
box->width = cursor->width;
box->height = cursor->height;
}
static void output_cursor_damage_whole(struct wlr_output_cursor *cursor) {
struct wlr_box box;
output_cursor_get_box(cursor, &box);
pixman_region32_t damage;
pixman_region32_init_rect(&damage, box.x, box.y, box.width, box.height);
struct wlr_output_event_damage event = {
.output = cursor->output,
.damage = &damage,
};
wlr_signal_emit_safe(&cursor->output->events.damage, &event);
pixman_region32_fini(&damage);
}
static void output_cursor_reset(struct wlr_output_cursor *cursor) {
if (cursor->output->hardware_cursor != cursor) {
output_cursor_damage_whole(cursor);
}
if (cursor->surface != NULL) {
wl_list_remove(&cursor->surface_commit.link);
wl_list_remove(&cursor->surface_destroy.link);
if (cursor->visible) {
wlr_surface_send_leave(cursor->surface, cursor->output);
}
cursor->surface = NULL;
}
}
static void output_cursor_update_visible(struct wlr_output_cursor *cursor) {
struct wlr_box output_box;
output_box.x = output_box.y = 0;
wlr_output_transformed_resolution(cursor->output, &output_box.width,
&output_box.height);
struct wlr_box cursor_box;
output_cursor_get_box(cursor, &cursor_box);
struct wlr_box intersection;
bool visible =
wlr_box_intersection(&intersection, &output_box, &cursor_box);
if (cursor->surface != NULL) {
if (cursor->visible && !visible) {
wlr_surface_send_leave(cursor->surface, cursor->output);
}
if (!cursor->visible && visible) {
wlr_surface_send_enter(cursor->surface, cursor->output);
}
}
cursor->visible = visible;
}
static bool output_cursor_attempt_hardware(struct wlr_output_cursor *cursor) {
int32_t scale = cursor->output->scale;
enum wl_output_transform transform = WL_OUTPUT_TRANSFORM_NORMAL;
struct wlr_texture *texture = cursor->texture;
if (cursor->surface != NULL) {
texture = wlr_surface_get_texture(cursor->surface);
scale = cursor->surface->current.scale;
transform = cursor->surface->current.transform;
}
if (cursor->output->software_cursor_locks > 0) {
return false;
}
struct wlr_output_cursor *hwcur = cursor->output->hardware_cursor;
if (cursor->output->impl->set_cursor && (hwcur == NULL || hwcur == cursor)) {
// If the cursor was hidden or was a software cursor, the hardware
// cursor position is outdated
assert(cursor->output->impl->move_cursor);
cursor->output->impl->move_cursor(cursor->output,
(int)cursor->x, (int)cursor->y);
if (cursor->output->impl->set_cursor(cursor->output, texture,
scale, transform, cursor->hotspot_x, cursor->hotspot_y, true)) {
cursor->output->hardware_cursor = cursor;
return true;
}
}
return false;
}
bool wlr_output_cursor_set_image(struct wlr_output_cursor *cursor,
const uint8_t *pixels, int32_t stride, uint32_t width, uint32_t height,
int32_t hotspot_x, int32_t hotspot_y) {
struct wlr_renderer *renderer =
wlr_backend_get_renderer(cursor->output->backend);
if (!renderer) {
// if the backend has no renderer, we can't draw a cursor, but this is
// actually okay, for ex. with the noop backend
return true;
}
output_cursor_reset(cursor);
cursor->width = width;
cursor->height = height;
cursor->hotspot_x = hotspot_x;
cursor->hotspot_y = hotspot_y;
output_cursor_update_visible(cursor);
wlr_texture_destroy(cursor->texture);
cursor->texture = NULL;
cursor->enabled = false;
if (pixels != NULL) {
cursor->texture = wlr_texture_from_pixels(renderer,
WL_SHM_FORMAT_ARGB8888, stride, width, height, pixels);
if (cursor->texture == NULL) {
return false;
}
cursor->enabled = true;
}
if (output_cursor_attempt_hardware(cursor)) {
return true;
}
wlr_log(WLR_DEBUG, "Falling back to software cursor on output '%s'",
cursor->output->name);
output_cursor_damage_whole(cursor);
return true;
}
static void output_cursor_commit(struct wlr_output_cursor *cursor,
bool update_hotspot) {
if (cursor->output->hardware_cursor != cursor) {
output_cursor_damage_whole(cursor);
}
struct wlr_surface *surface = cursor->surface;
assert(surface != NULL);
// Some clients commit a cursor surface with a NULL buffer to hide it.
cursor->enabled = wlr_surface_has_buffer(surface);
cursor->width = surface->current.width * cursor->output->scale;
cursor->height = surface->current.height * cursor->output->scale;
output_cursor_update_visible(cursor);
if (update_hotspot) {
cursor->hotspot_x -= surface->current.dx * cursor->output->scale;
cursor->hotspot_y -= surface->current.dy * cursor->output->scale;
}
if (output_cursor_attempt_hardware(cursor)) {
return;
}
// Fallback to software cursor
output_cursor_damage_whole(cursor);
}
static void output_cursor_handle_commit(struct wl_listener *listener,
void *data) {
struct wlr_output_cursor *cursor =
wl_container_of(listener, cursor, surface_commit);
output_cursor_commit(cursor, true);
}
static void output_cursor_handle_destroy(struct wl_listener *listener,
void *data) {
struct wlr_output_cursor *cursor = wl_container_of(listener, cursor,
surface_destroy);
output_cursor_reset(cursor);
}
void wlr_output_cursor_set_surface(struct wlr_output_cursor *cursor,
struct wlr_surface *surface, int32_t hotspot_x, int32_t hotspot_y) {
hotspot_x *= cursor->output->scale;
hotspot_y *= cursor->output->scale;
if (surface && surface == cursor->surface) {
// Only update the hotspot: surface hasn't changed
if (cursor->output->hardware_cursor != cursor) {
output_cursor_damage_whole(cursor);
}
cursor->hotspot_x = hotspot_x;
cursor->hotspot_y = hotspot_y;
if (cursor->output->hardware_cursor != cursor) {
output_cursor_damage_whole(cursor);
} else {
assert(cursor->output->impl->set_cursor);
cursor->output->impl->set_cursor(cursor->output, NULL,
1, WL_OUTPUT_TRANSFORM_NORMAL, hotspot_x, hotspot_y, false);
}
return;
}
output_cursor_reset(cursor);
cursor->surface = surface;
cursor->hotspot_x = hotspot_x;
cursor->hotspot_y = hotspot_y;
if (surface != NULL) {
wl_signal_add(&surface->events.commit, &cursor->surface_commit);
wl_signal_add(&surface->events.destroy, &cursor->surface_destroy);
cursor->visible = false;
output_cursor_commit(cursor, false);
} else {
cursor->enabled = false;
cursor->width = 0;
cursor->height = 0;
if (cursor->output->hardware_cursor == cursor) {
assert(cursor->output->impl->set_cursor);
cursor->output->impl->set_cursor(cursor->output, NULL, 1,
WL_OUTPUT_TRANSFORM_NORMAL, 0, 0, true);
}
}
}
bool wlr_output_cursor_move(struct wlr_output_cursor *cursor,
double x, double y) {
if (cursor->x == x && cursor->y == y) {
return true;
}
if (cursor->output->hardware_cursor != cursor) {
output_cursor_damage_whole(cursor);
}
bool was_visible = cursor->visible;
x *= cursor->output->scale;
y *= cursor->output->scale;
cursor->x = x;
cursor->y = y;
output_cursor_update_visible(cursor);
if (!was_visible && !cursor->visible) {
// Cursor is still hidden, do nothing
return true;
}
if (cursor->output->hardware_cursor != cursor) {
output_cursor_damage_whole(cursor);
return true;
}
assert(cursor->output->impl->move_cursor);
return cursor->output->impl->move_cursor(cursor->output, (int)x, (int)y);
}
struct wlr_output_cursor *wlr_output_cursor_create(struct wlr_output *output) {
struct wlr_output_cursor *cursor =
calloc(1, sizeof(struct wlr_output_cursor));
if (cursor == NULL) {
return NULL;
}
cursor->output = output;
wl_signal_init(&cursor->events.destroy);
wl_list_init(&cursor->surface_commit.link);
cursor->surface_commit.notify = output_cursor_handle_commit;
wl_list_init(&cursor->surface_destroy.link);
cursor->surface_destroy.notify = output_cursor_handle_destroy;
wl_list_insert(&output->cursors, &cursor->link);
cursor->visible = true; // default position is at (0, 0)
return cursor;
}
void wlr_output_cursor_destroy(struct wlr_output_cursor *cursor) {
if (cursor == NULL) {
return;
}
output_cursor_reset(cursor);
wlr_signal_emit_safe(&cursor->events.destroy, cursor);
if (cursor->output->hardware_cursor == cursor) {
// If this cursor was the hardware cursor, disable it
if (cursor->output->impl->set_cursor) {
cursor->output->impl->set_cursor(cursor->output, NULL, 1,
WL_OUTPUT_TRANSFORM_NORMAL, 0, 0, true);
}
cursor->output->hardware_cursor = NULL;
}
wlr_texture_destroy(cursor->texture);
wl_list_remove(&cursor->link);
free(cursor);
}
enum wl_output_transform wlr_output_transform_invert(
enum wl_output_transform tr) {
if ((tr & WL_OUTPUT_TRANSFORM_90) && !(tr & WL_OUTPUT_TRANSFORM_FLIPPED)) {
tr ^= WL_OUTPUT_TRANSFORM_180;
}
return tr;
}
enum wl_output_transform wlr_output_transform_compose(
enum wl_output_transform tr_a, enum wl_output_transform tr_b) {
uint32_t flipped = (tr_a ^ tr_b) & WL_OUTPUT_TRANSFORM_FLIPPED;
uint32_t rotation_mask = WL_OUTPUT_TRANSFORM_90 | WL_OUTPUT_TRANSFORM_180;
uint32_t rotated;
if (tr_b & WL_OUTPUT_TRANSFORM_FLIPPED) {
// When a rotation of k degrees is followed by a flip, the
// equivalent transform is a flip followed by a rotation of
// -k degrees.
rotated = (tr_b - tr_a) & rotation_mask;
} else {
rotated = (tr_a + tr_b) & rotation_mask;
}
return flipped | rotated;
}