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#define _POSIX_C_SOURCE 200809L
#include <assert.h>
#include <stdbool.h>
#include <stdlib.h>
#include <time.h>
#include <wlr/backend/drm.h>
#include <wlr/config.h>
#include <wlr/types/wlr_compositor.h>
#include <wlr/types/wlr_output_layout.h>
#include <wlr/types/wlr_presentation_time.h>
#include <wlr/types/wlr_wl_shell.h>
#include <wlr/types/wlr_xdg_shell_v6.h>
#include <wlr/types/wlr_xdg_shell.h>
#include <wlr/util/log.h>
#include <wlr/util/region.h>
#include <wlr/xwayland.h>
#include "rootston/config.h"
#include "rootston/layers.h"
#include "rootston/output.h"
#include "rootston/server.h"
/**
* Rotate a child's position relative to a parent. The parent size is (pw, ph),
* the child position is (*sx, *sy) and its size is (sw, sh).
*/
void rotate_child_position(double *sx, double *sy, double sw, double sh,
double pw, double ph, float rotation) {
if (rotation == 0.0) {
return;
}
// Coordinates relative to the center of the subsurface
double cx = *sx - pw/2 + sw/2,
cy = *sy - ph/2 + sh/2;
// Rotated coordinates
double rx = cos(rotation)*cx - sin(rotation)*cy,
ry = cos(rotation)*cy + sin(rotation)*cx;
*sx = rx + pw/2 - sw/2;
*sy = ry + ph/2 - sh/2;
}
struct surface_iterator_data {
roots_surface_iterator_func_t user_iterator;
void *user_data;
struct roots_output *output;
double ox, oy;
int width, height;
float rotation;
};
static bool get_surface_box(struct surface_iterator_data *data,
struct wlr_surface *surface, int sx, int sy,
struct wlr_box *surface_box) {
struct roots_output *output = data->output;
if (!wlr_surface_has_buffer(surface)) {
return false;
}
int sw = surface->current.width;
int sh = surface->current.height;
double _sx = sx + surface->sx;
double _sy = sy + surface->sy;
rotate_child_position(&_sx, &_sy, sw, sh, data->width, data->height,
data->rotation);
struct wlr_box box = {
.x = data->ox + _sx,
.y = data->oy + _sy,
.width = sw,
.height = sh,
};
if (surface_box != NULL) {
*surface_box = box;
}
struct wlr_box rotated_box;
wlr_box_rotated_bounds(&rotated_box, &box, data->rotation);
struct wlr_box output_box = {0};
wlr_output_effective_resolution(output->wlr_output,
&output_box.width, &output_box.height);
struct wlr_box intersection;
return wlr_box_intersection(&intersection, &output_box, &rotated_box);
}
static void output_for_each_surface_iterator(struct wlr_surface *surface,
int sx, int sy, void *_data) {
struct surface_iterator_data *data = _data;
struct wlr_box box;
bool intersects = get_surface_box(data, surface, sx, sy, &box);
if (!intersects) {
return;
}
data->user_iterator(data->output, surface, &box, data->rotation,
data->user_data);
}
void output_surface_for_each_surface(struct roots_output *output,
struct wlr_surface *surface, double ox, double oy,
roots_surface_iterator_func_t iterator, void *user_data) {
struct surface_iterator_data data = {
.user_iterator = iterator,
.user_data = user_data,
.output = output,
.ox = ox,
.oy = oy,
.width = surface->current.width,
.height = surface->current.height,
.rotation = 0,
};
wlr_surface_for_each_surface(surface,
output_for_each_surface_iterator, &data);
}
void output_view_for_each_surface(struct roots_output *output,
struct roots_view *view, roots_surface_iterator_func_t iterator,
void *user_data) {
struct surface_iterator_data data = {
.user_iterator = iterator,
.user_data = user_data,
.output = output,
.ox = view->box.x - output->wlr_output->lx,
.oy = view->box.y - output->wlr_output->ly,
.width = view->box.width,
.height = view->box.height,
.rotation = view->rotation,
};
view_for_each_surface(view, output_for_each_surface_iterator, &data);
}
#if WLR_HAS_XWAYLAND
void output_xwayland_children_for_each_surface(
struct roots_output *output, struct wlr_xwayland_surface *surface,
roots_surface_iterator_func_t iterator, void *user_data) {
struct wlr_xwayland_surface *child;
wl_list_for_each(child, &surface->children, parent_link) {
if (child->mapped) {
double ox = child->x - output->wlr_output->lx;
double oy = child->y - output->wlr_output->ly;
output_surface_for_each_surface(output, child->surface,
ox, oy, iterator, user_data);
}
output_xwayland_children_for_each_surface(output, child,
iterator, user_data);
}
}
#endif
void output_layer_for_each_surface(struct roots_output *output,
struct wl_list *layer_surfaces, roots_surface_iterator_func_t iterator,
void *user_data) {
struct roots_layer_surface *layer_surface;
wl_list_for_each(layer_surface, layer_surfaces, link) {
struct wlr_layer_surface_v1 *wlr_layer_surface_v1 =
layer_surface->layer_surface;
output_surface_for_each_surface(output, wlr_layer_surface_v1->surface,
layer_surface->geo.x, layer_surface->geo.y, iterator,
user_data);
struct wlr_xdg_popup *state;
wl_list_for_each(state, &wlr_layer_surface_v1->popups, link) {
struct wlr_xdg_surface *popup = state->base;
if (!popup->configured) {
continue;
}
double popup_sx, popup_sy;
popup_sx = layer_surface->geo.x;
popup_sx += popup->popup->geometry.x - popup->geometry.x;
popup_sy = layer_surface->geo.y;
popup_sy += popup->popup->geometry.y - popup->geometry.y;
output_surface_for_each_surface(output, popup->surface,
popup_sx, popup_sy, iterator, user_data);
}
}
}
void output_drag_icons_for_each_surface(struct roots_output *output,
struct roots_input *input, roots_surface_iterator_func_t iterator,
void *user_data) {
struct roots_seat *seat;
wl_list_for_each(seat, &input->seats, link) {
struct roots_drag_icon *drag_icon = seat->drag_icon;
if (!drag_icon || !drag_icon->wlr_drag_icon->mapped) {
continue;
}
double ox = drag_icon->x - output->wlr_output->lx;
double oy = drag_icon->y - output->wlr_output->ly;
output_surface_for_each_surface(output,
drag_icon->wlr_drag_icon->surface, ox, oy, iterator, user_data);
}
}
void output_for_each_surface(struct roots_output *output,
roots_surface_iterator_func_t iterator, void *user_data) {
struct roots_desktop *desktop = output->desktop;
if (output->fullscreen_view != NULL) {
struct roots_view *view = output->fullscreen_view;
output_view_for_each_surface(output, view, iterator, user_data);
#if WLR_HAS_XWAYLAND
if (view->type == ROOTS_XWAYLAND_VIEW) {
struct roots_xwayland_surface *xwayland_surface =
roots_xwayland_surface_from_view(view);
output_xwayland_children_for_each_surface(output,
xwayland_surface->xwayland_surface, iterator, user_data);
}
#endif
} else {
struct roots_view *view;
wl_list_for_each_reverse(view, &desktop->views, link) {
output_view_for_each_surface(output, view, iterator, user_data);
}
}
output_drag_icons_for_each_surface(output, desktop->server->input,
iterator, user_data);
size_t len = sizeof(output->layers) / sizeof(output->layers[0]);
for (size_t i = 0; i < len; ++i) {
output_layer_for_each_surface(output, &output->layers[i],
iterator, user_data);
}
}
static int scale_length(int length, int offset, float scale) {
return round((offset + length) * scale) - round(offset * scale);
}
void scale_box(struct wlr_box *box, float scale) {
box->width = scale_length(box->width, box->x, scale);
box->height = scale_length(box->height, box->y, scale);
box->x = round(box->x * scale);
box->y = round(box->y * scale);
}
void get_decoration_box(struct roots_view *view,
struct roots_output *output, struct wlr_box *box) {
struct wlr_output *wlr_output = output->wlr_output;
struct wlr_box deco_box;
view_get_deco_box(view, &deco_box);
double sx = deco_box.x - view->box.x;
double sy = deco_box.y - view->box.y;
rotate_child_position(&sx, &sy, deco_box.width, deco_box.height,
view->wlr_surface->current.width,
view->wlr_surface->current.height, view->rotation);
double x = sx + view->box.x;
double y = sy + view->box.y;
wlr_output_layout_output_coords(output->desktop->layout, wlr_output, &x, &y);
box->x = x * wlr_output->scale;
box->y = y * wlr_output->scale;
box->width = deco_box.width * wlr_output->scale;
box->height = deco_box.height * wlr_output->scale;
}
void output_damage_whole(struct roots_output *output) {
wlr_output_damage_add_whole(output->damage);
}
static bool view_accept_damage(struct roots_output *output,
struct roots_view *view) {
if (view->wlr_surface == NULL) {
return false;
}
if (output->fullscreen_view == NULL) {
return true;
}
if (output->fullscreen_view == view) {
return true;
}
#if WLR_HAS_XWAYLAND
if (output->fullscreen_view->type == ROOTS_XWAYLAND_VIEW &&
view->type == ROOTS_XWAYLAND_VIEW) {
// Special case: accept damage from children
struct wlr_xwayland_surface *xsurface =
roots_xwayland_surface_from_view(view)->xwayland_surface;
struct wlr_xwayland_surface *fullscreen_xsurface =
roots_xwayland_surface_from_view(output->fullscreen_view)->xwayland_surface;
while (xsurface != NULL) {
if (fullscreen_xsurface == xsurface) {
return true;
}
xsurface = xsurface->parent;
}
}
#endif
return false;
}
static void damage_surface_iterator(struct roots_output *output,
struct wlr_surface *surface, struct wlr_box *_box, float rotation,
void *data) {
bool *whole = data;
struct wlr_box box = *_box;
scale_box(&box, output->wlr_output->scale);
int center_x = box.x + box.width/2;
int center_y = box.y + box.height/2;
if (pixman_region32_not_empty(&surface->buffer_damage)) {
pixman_region32_t damage;
pixman_region32_init(&damage);
wlr_surface_get_effective_damage(surface, &damage);
wlr_region_scale(&damage, &damage, output->wlr_output->scale);
if (ceil(output->wlr_output->scale) > surface->current.scale) {
// When scaling up a surface, it'll become blurry so we need to
// expand the damage region
wlr_region_expand(&damage, &damage,
ceil(output->wlr_output->scale) - surface->current.scale);
}
pixman_region32_translate(&damage, box.x, box.y);
wlr_region_rotated_bounds(&damage, &damage, rotation,
center_x, center_y);
wlr_output_damage_add(output->damage, &damage);
pixman_region32_fini(&damage);
}
if (*whole) {
wlr_box_rotated_bounds(&box, &box, rotation);
wlr_output_damage_add_box(output->damage, &box);
}
wlr_output_schedule_frame(output->wlr_output);
}
void output_damage_whole_local_surface(struct roots_output *output,
struct wlr_surface *surface, double ox, double oy) {
bool whole = true;
output_surface_for_each_surface(output, surface, ox, oy,
damage_surface_iterator, &whole);
}
static void damage_whole_decoration(struct roots_view *view,
struct roots_output *output) {
if (!view->decorated || view->wlr_surface == NULL) {
return;
}
struct wlr_box box;
get_decoration_box(view, output, &box);
wlr_box_rotated_bounds(&box, &box, view->rotation);
wlr_output_damage_add_box(output->damage, &box);
}
void output_damage_whole_view(struct roots_output *output,
struct roots_view *view) {
if (!view_accept_damage(output, view)) {
return;
}
damage_whole_decoration(view, output);
bool whole = true;
output_view_for_each_surface(output, view, damage_surface_iterator, &whole);
}
void output_damage_whole_drag_icon(struct roots_output *output,
struct roots_drag_icon *icon) {
bool whole = true;
output_surface_for_each_surface(output, icon->wlr_drag_icon->surface,
icon->x, icon->y, damage_surface_iterator, &whole);
}
void output_damage_from_local_surface(struct roots_output *output,
struct wlr_surface *surface, double ox, double oy) {
bool whole = false;
output_surface_for_each_surface(output, surface, ox, oy,
damage_surface_iterator, &whole);
}
void output_damage_from_view(struct roots_output *output,
struct roots_view *view) {
if (!view_accept_damage(output, view)) {
return;
}
bool whole = false;
output_view_for_each_surface(output, view, damage_surface_iterator, &whole);
}
static void set_mode(struct wlr_output *output,
struct roots_output_config *oc) {
int mhz = (int)(oc->mode.refresh_rate * 1000);
if (wl_list_empty(&output->modes)) {
// Output has no mode, try setting a custom one
wlr_output_set_custom_mode(output, oc->mode.width, oc->mode.height, mhz);
return;
}
struct wlr_output_mode *mode, *best = NULL;
wl_list_for_each(mode, &output->modes, link) {
if (mode->width == oc->mode.width && mode->height == oc->mode.height) {
if (mode->refresh == mhz) {
best = mode;
break;
}
best = mode;
}
}
if (!best) {
wlr_log(WLR_ERROR, "Configured mode for %s not available", output->name);
} else {
wlr_log(WLR_DEBUG, "Assigning configured mode to %s", output->name);
wlr_output_set_mode(output, best);
}
}
static void update_output_manager_config(struct roots_desktop *desktop) {
struct wlr_output_configuration_v1 *config =
wlr_output_configuration_v1_create();
struct roots_output *output;
wl_list_for_each(output, &desktop->outputs, link) {
struct wlr_output_configuration_head_v1 *head =
wlr_output_configuration_head_v1_create(config, output->wlr_output);
(void)head;
}
wlr_output_manager_v1_set_configuration(desktop->output_manager_v1, config);
}
static void output_destroy(struct roots_output *output) {
// TODO: cursor
//example_config_configure_cursor(sample->config, sample->cursor,
// sample->compositor);
wl_list_remove(&output->link);
wl_list_remove(&output->destroy.link);
wl_list_remove(&output->enable.link);
wl_list_remove(&output->mode.link);
wl_list_remove(&output->transform.link);
wl_list_remove(&output->present.link);
wl_list_remove(&output->damage_frame.link);
wl_list_remove(&output->damage_destroy.link);
free(output);
}
static void output_handle_destroy(struct wl_listener *listener, void *data) {
struct roots_output *output = wl_container_of(listener, output, destroy);
struct roots_desktop *desktop = output->desktop;
output_destroy(output);
update_output_manager_config(desktop);
}
static void output_handle_enable(struct wl_listener *listener, void *data) {
struct roots_output *output = wl_container_of(listener, output, enable);
update_output_manager_config(output->desktop);
}
static void output_damage_handle_frame(struct wl_listener *listener,
void *data) {
struct roots_output *output =
wl_container_of(listener, output, damage_frame);
output_render(output);
}
static void output_damage_handle_destroy(struct wl_listener *listener,
void *data) {
struct roots_output *output =
wl_container_of(listener, output, damage_destroy);
output_destroy(output);
}
static void output_handle_mode(struct wl_listener *listener, void *data) {
struct roots_output *output =
wl_container_of(listener, output, mode);
arrange_layers(output);
update_output_manager_config(output->desktop);
}
static void output_handle_transform(struct wl_listener *listener, void *data) {
struct roots_output *output =
wl_container_of(listener, output, transform);
arrange_layers(output);
}
static void surface_send_presented_iterator(struct roots_output *output,
struct wlr_surface *surface, struct wlr_box *_box, float rotation,
void *data) {
struct wlr_presentation_event *event = data;
wlr_presentation_send_surface_presented(output->desktop->presentation,
surface, event);
}
static void output_handle_present(struct wl_listener *listener, void *data) {
struct roots_output *output =
wl_container_of(listener, output, present);
struct wlr_output_event_present *output_event = data;
struct wlr_presentation_event event = {
.output = output->wlr_output,
.tv_sec = (uint64_t)output_event->when->tv_sec,
.tv_nsec = (uint32_t)output_event->when->tv_nsec,
.refresh = (uint32_t)output_event->refresh,
.seq = (uint64_t)output_event->seq,
.flags = output_event->flags,
};
output_for_each_surface(output,
surface_send_presented_iterator, &event);
}
void handle_new_output(struct wl_listener *listener, void *data) {
struct roots_desktop *desktop = wl_container_of(listener, desktop,
new_output);
struct wlr_output *wlr_output = data;
struct roots_input *input = desktop->server->input;
struct roots_config *config = desktop->config;
wlr_log(WLR_DEBUG, "Output '%s' added", wlr_output->name);
wlr_log(WLR_DEBUG, "'%s %s %s' %"PRId32"mm x %"PRId32"mm", wlr_output->make,
wlr_output->model, wlr_output->serial, wlr_output->phys_width,
wlr_output->phys_height);
struct roots_output *output = calloc(1, sizeof(struct roots_output));
clock_gettime(CLOCK_MONOTONIC, &output->last_frame);
output->desktop = desktop;
output->wlr_output = wlr_output;
wlr_output->data = output;
wl_list_insert(&desktop->outputs, &output->link);
output->damage = wlr_output_damage_create(wlr_output);
output->destroy.notify = output_handle_destroy;
wl_signal_add(&wlr_output->events.destroy, &output->destroy);
output->enable.notify = output_handle_enable;
wl_signal_add(&wlr_output->events.enable, &output->enable);
output->mode.notify = output_handle_mode;
wl_signal_add(&wlr_output->events.mode, &output->mode);
output->transform.notify = output_handle_transform;
wl_signal_add(&wlr_output->events.transform, &output->transform);
output->present.notify = output_handle_present;
wl_signal_add(&wlr_output->events.present, &output->present);
output->damage_frame.notify = output_damage_handle_frame;
wl_signal_add(&output->damage->events.frame, &output->damage_frame);
output->damage_destroy.notify = output_damage_handle_destroy;
wl_signal_add(&output->damage->events.destroy, &output->damage_destroy);
size_t len = sizeof(output->layers) / sizeof(output->layers[0]);
for (size_t i = 0; i < len; ++i) {
wl_list_init(&output->layers[i]);
}
struct roots_output_config *output_config =
roots_config_get_output(config, wlr_output);
if ((!output_config || output_config->enable) && !wl_list_empty(&wlr_output->modes)) {
struct wlr_output_mode *mode =
wl_container_of(wlr_output->modes.prev, mode, link);
wlr_output_set_mode(wlr_output, mode);
}
if (output_config) {
if (output_config->enable) {
if (wlr_output_is_drm(wlr_output)) {
struct roots_output_mode_config *mode_config;
wl_list_for_each(mode_config, &output_config->modes, link) {
wlr_drm_connector_add_mode(wlr_output, &mode_config->info);
}
} else if (!wl_list_empty(&output_config->modes)) {
wlr_log(WLR_ERROR, "Can only add modes for DRM backend");
}
if (output_config->mode.width) {
set_mode(wlr_output, output_config);
}
wlr_output_set_scale(wlr_output, output_config->scale);
wlr_output_set_transform(wlr_output, output_config->transform);
wlr_output_layout_add(desktop->layout, wlr_output, output_config->x,
output_config->y);
} else {
wlr_output_enable(wlr_output, false);
}
} else {
wlr_output_layout_add_auto(desktop->layout, wlr_output);
}
struct roots_seat *seat;
wl_list_for_each(seat, &input->seats, link) {
roots_seat_configure_cursor(seat);
roots_seat_configure_xcursor(seat);
}
arrange_layers(output);
output_damage_whole(output);
update_output_manager_config(desktop);
}