swayfx/sway/config/output.c
Simon Ser 2f84d6e349 Auto-detect output scale
If the screen DPI is high enough, auto-enable scale=2 (if the user
hasn't set the scale).

Uses heuristics based on [1].

[1]: 0521706617/src/backends/meta-monitor.c (L1590)

Closes: https://github.com/swaywm/sway/issues/1800
2019-12-12 19:00:24 -05:00

730 lines
22 KiB
C

#define _POSIX_C_SOURCE 200809L
#include <assert.h>
#include <stdbool.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <unistd.h>
#include <wlr/types/wlr_cursor.h>
#include <wlr/types/wlr_output_layout.h>
#include <wlr/types/wlr_output.h>
#include "sway/config.h"
#include "sway/input/cursor.h"
#include "sway/output.h"
#include "sway/tree/root.h"
#include "log.h"
#include "util.h"
int output_name_cmp(const void *item, const void *data) {
const struct output_config *output = item;
const char *name = data;
return strcmp(output->name, name);
}
void output_get_identifier(char *identifier, size_t len,
struct sway_output *output) {
struct wlr_output *wlr_output = output->wlr_output;
snprintf(identifier, len, "%s %s %s", wlr_output->make, wlr_output->model,
wlr_output->serial);
}
const char *sway_output_scale_filter_to_string(enum scale_filter_mode scale_filter) {
switch (scale_filter) {
case SCALE_FILTER_DEFAULT:
return "smart";
case SCALE_FILTER_LINEAR:
return "linear";
case SCALE_FILTER_NEAREST:
return "nearest";
case SCALE_FILTER_SMART:
return "smart";
}
sway_assert(false, "Unknown value for scale_filter.");
return NULL;
}
struct output_config *new_output_config(const char *name) {
struct output_config *oc = calloc(1, sizeof(struct output_config));
if (oc == NULL) {
return NULL;
}
oc->name = strdup(name);
if (oc->name == NULL) {
free(oc);
return NULL;
}
oc->enabled = -1;
oc->width = oc->height = -1;
oc->refresh_rate = -1;
oc->custom_mode = -1;
oc->x = oc->y = -1;
oc->scale = -1;
oc->scale_filter = SCALE_FILTER_DEFAULT;
oc->transform = -1;
oc->subpixel = WL_OUTPUT_SUBPIXEL_UNKNOWN;
oc->max_render_time = -1;
return oc;
}
void merge_output_config(struct output_config *dst, struct output_config *src) {
if (src->enabled != -1) {
dst->enabled = src->enabled;
}
if (src->width != -1) {
dst->width = src->width;
}
if (src->height != -1) {
dst->height = src->height;
}
if (src->x != -1) {
dst->x = src->x;
}
if (src->y != -1) {
dst->y = src->y;
}
if (src->scale != -1) {
dst->scale = src->scale;
}
if (src->scale_filter != SCALE_FILTER_DEFAULT) {
dst->scale_filter = src->scale_filter;
}
if (src->subpixel != WL_OUTPUT_SUBPIXEL_UNKNOWN) {
dst->subpixel = src->subpixel;
}
if (src->refresh_rate != -1) {
dst->refresh_rate = src->refresh_rate;
}
if (src->custom_mode != -1) {
dst->custom_mode = src->custom_mode;
}
if (src->transform != -1) {
dst->transform = src->transform;
}
if (src->max_render_time != -1) {
dst->max_render_time = src->max_render_time;
}
if (src->background) {
free(dst->background);
dst->background = strdup(src->background);
}
if (src->background_option) {
free(dst->background_option);
dst->background_option = strdup(src->background_option);
}
if (src->background_fallback) {
free(dst->background_fallback);
dst->background_fallback = strdup(src->background_fallback);
}
if (src->dpms_state != 0) {
dst->dpms_state = src->dpms_state;
}
}
static void merge_wildcard_on_all(struct output_config *wildcard) {
for (int i = 0; i < config->output_configs->length; i++) {
struct output_config *oc = config->output_configs->items[i];
if (strcmp(wildcard->name, oc->name) != 0) {
sway_log(SWAY_DEBUG, "Merging output * config on %s", oc->name);
merge_output_config(oc, wildcard);
}
}
}
static void merge_id_on_name(struct output_config *oc) {
char *id_on_name = NULL;
char id[128];
char *name = NULL;
struct sway_output *output;
wl_list_for_each(output, &root->all_outputs, link) {
name = output->wlr_output->name;
output_get_identifier(id, sizeof(id), output);
if (strcmp(name, oc->name) == 0 || strcmp(id, oc->name) == 0) {
size_t length = snprintf(NULL, 0, "%s on %s", id, name) + 1;
id_on_name = malloc(length);
if (!id_on_name) {
sway_log(SWAY_ERROR, "Failed to allocate id on name string");
return;
}
snprintf(id_on_name, length, "%s on %s", id, name);
break;
}
}
if (!id_on_name) {
return;
}
int i = list_seq_find(config->output_configs, output_name_cmp, id_on_name);
if (i >= 0) {
sway_log(SWAY_DEBUG, "Merging on top of existing id on name config");
merge_output_config(config->output_configs->items[i], oc);
} else {
// If both a name and identifier config, exist generate an id on name
int ni = list_seq_find(config->output_configs, output_name_cmp, name);
int ii = list_seq_find(config->output_configs, output_name_cmp, id);
if ((ni >= 0 && ii >= 0) || (ni >= 0 && strcmp(oc->name, id) == 0)
|| (ii >= 0 && strcmp(oc->name, name) == 0)) {
struct output_config *ion_oc = new_output_config(id_on_name);
if (ni >= 0) {
merge_output_config(ion_oc, config->output_configs->items[ni]);
}
if (ii >= 0) {
merge_output_config(ion_oc, config->output_configs->items[ii]);
}
merge_output_config(ion_oc, oc);
list_add(config->output_configs, ion_oc);
sway_log(SWAY_DEBUG, "Generated id on name output config \"%s\""
" (enabled: %d) (%dx%d@%fHz position %d,%d scale %f "
"transform %d) (bg %s %s) (dpms %d) (max render time: %d)",
ion_oc->name, ion_oc->enabled, ion_oc->width, ion_oc->height,
ion_oc->refresh_rate, ion_oc->x, ion_oc->y, ion_oc->scale,
ion_oc->transform, ion_oc->background,
ion_oc->background_option, ion_oc->dpms_state,
ion_oc->max_render_time);
}
}
free(id_on_name);
}
struct output_config *store_output_config(struct output_config *oc) {
bool wildcard = strcmp(oc->name, "*") == 0;
if (wildcard) {
merge_wildcard_on_all(oc);
} else {
merge_id_on_name(oc);
}
int i = list_seq_find(config->output_configs, output_name_cmp, oc->name);
if (i >= 0) {
sway_log(SWAY_DEBUG, "Merging on top of existing output config");
struct output_config *current = config->output_configs->items[i];
merge_output_config(current, oc);
free_output_config(oc);
oc = current;
} else if (!wildcard) {
sway_log(SWAY_DEBUG, "Adding non-wildcard output config");
i = list_seq_find(config->output_configs, output_name_cmp, "*");
if (i >= 0) {
sway_log(SWAY_DEBUG, "Merging on top of output * config");
struct output_config *current = new_output_config(oc->name);
merge_output_config(current, config->output_configs->items[i]);
merge_output_config(current, oc);
free_output_config(oc);
oc = current;
}
list_add(config->output_configs, oc);
} else {
// New wildcard config. Just add it
sway_log(SWAY_DEBUG, "Adding output * config");
list_add(config->output_configs, oc);
}
sway_log(SWAY_DEBUG, "Config stored for output %s (enabled: %d) (%dx%d@%fHz "
"position %d,%d scale %f subpixel %s transform %d) (bg %s %s) (dpms %d) "
"(max render time: %d)",
oc->name, oc->enabled, oc->width, oc->height, oc->refresh_rate,
oc->x, oc->y, oc->scale, sway_wl_output_subpixel_to_string(oc->subpixel),
oc->transform, oc->background, oc->background_option, oc->dpms_state,
oc->max_render_time);
return oc;
}
static bool set_mode(struct wlr_output *output, int width, int height,
float refresh_rate, bool custom) {
int mhz = (int)(refresh_rate * 1000);
if (wl_list_empty(&output->modes) || custom) {
sway_log(SWAY_DEBUG, "Assigning custom mode to %s", output->name);
return wlr_output_set_custom_mode(output, width, height,
refresh_rate > 0 ? mhz : 0);
}
struct wlr_output_mode *mode, *best = NULL;
wl_list_for_each(mode, &output->modes, link) {
if (mode->width == width && mode->height == height) {
if (mode->refresh == mhz) {
best = mode;
break;
}
if (best == NULL || mode->refresh > best->refresh) {
best = mode;
}
}
}
if (!best) {
sway_log(SWAY_ERROR, "Configured mode for %s not available", output->name);
sway_log(SWAY_INFO, "Picking preferred mode instead");
best = wlr_output_preferred_mode(output);
} else {
sway_log(SWAY_DEBUG, "Assigning configured mode to %s", output->name);
}
return wlr_output_set_mode(output, best);
}
/* Some manufacturers hardcode the aspect-ratio of the output in the physical
* size field. */
static bool phys_size_is_aspect_ratio(struct wlr_output *output) {
return (output->phys_width == 1600 && output->phys_height == 900) ||
(output->phys_width == 1600 && output->phys_height == 1000) ||
(output->phys_width == 160 && output->phys_height == 90) ||
(output->phys_width == 160 && output->phys_height == 100) ||
(output->phys_width == 16 && output->phys_height == 9) ||
(output->phys_width == 16 && output->phys_height == 10);
}
// The minimum DPI at which we turn on a scale of 2
#define HIDPI_DPI_LIMIT (2 * 96)
// The minimum screen height at which we turn on a scale of 2
#define HIDPI_MIN_HEIGHT 1200
// 1 inch = 25.4 mm
#define MM_PER_INCH 25.4
static int compute_default_scale(struct wlr_output *output) {
int width, height;
wlr_output_transformed_resolution(output, &width, &height);
if (height < HIDPI_MIN_HEIGHT) {
return 1;
}
if (output->phys_width == 0 || output->phys_height == 0) {
return 1;
}
if (phys_size_is_aspect_ratio(output)) {
return 1;
}
double dpi_x = (double) width / (output->phys_width / MM_PER_INCH);
double dpi_y = (double) height / (output->phys_height / MM_PER_INCH);
sway_log(SWAY_DEBUG, "Output DPI: %fx%f", dpi_x, dpi_y);
if (dpi_x <= HIDPI_DPI_LIMIT || dpi_y <= HIDPI_DPI_LIMIT) {
return 1;
}
return 2;
}
bool apply_output_config(struct output_config *oc, struct sway_output *output) {
if (output == root->noop_output) {
return false;
}
struct wlr_output *wlr_output = output->wlr_output;
if (oc && !oc->enabled) {
// Output is configured to be disabled
if (output->enabled) {
output_disable(output);
wlr_output_layout_remove(root->output_layout, wlr_output);
}
wlr_output_enable(wlr_output, false);
return true;
} else if (!output->enabled) {
// Output is not enabled. Enable it, output_enable will call us again.
if (!oc || oc->dpms_state != DPMS_OFF) {
wlr_output_enable(wlr_output, true);
}
return output_enable(output, oc);
}
if (oc && oc->dpms_state == DPMS_ON) {
sway_log(SWAY_DEBUG, "Turning on screen");
wlr_output_enable(wlr_output, true);
}
bool modeset_success;
if (oc && oc->width > 0 && oc->height > 0) {
sway_log(SWAY_DEBUG, "Set %s mode to %dx%d (%f Hz)", oc->name, oc->width,
oc->height, oc->refresh_rate);
modeset_success = set_mode(wlr_output, oc->width, oc->height,
oc->refresh_rate, oc->custom_mode == 1);
} else if (!wl_list_empty(&wlr_output->modes)) {
struct wlr_output_mode *mode = wlr_output_preferred_mode(wlr_output);
modeset_success = wlr_output_set_mode(wlr_output, mode);
} else {
// Output doesn't support modes
modeset_success = true;
}
if (!modeset_success) {
// Failed to modeset, maybe the output is missing a CRTC. Leave the
// output disabled for now and try again when the output gets the mode
// we asked for.
sway_log(SWAY_ERROR, "Failed to modeset output %s", wlr_output->name);
return false;
}
output->current_mode = wlr_output->current_mode;
float scale;
if (oc && oc->scale > 0) {
scale = oc->scale;
} else {
scale = compute_default_scale(wlr_output);
sway_log(SWAY_DEBUG, "Auto-detected output scale: %f", scale);
}
if (scale != wlr_output->scale) {
sway_log(SWAY_DEBUG, "Set %s scale to %f", oc->name, scale);
wlr_output_set_scale(wlr_output, scale);
enum scale_filter_mode scale_filter_old = output->scale_filter;
switch (oc->scale_filter) {
case SCALE_FILTER_DEFAULT:
case SCALE_FILTER_SMART:
output->scale_filter = ceilf(wlr_output->scale) == wlr_output->scale ?
SCALE_FILTER_NEAREST : SCALE_FILTER_LINEAR;
break;
case SCALE_FILTER_LINEAR:
case SCALE_FILTER_NEAREST:
output->scale_filter = oc->scale_filter;
break;
}
if (scale_filter_old != output->scale_filter) {
sway_log(SWAY_DEBUG, "Set %s scale_filter to %s", oc->name,
sway_output_scale_filter_to_string(output->scale_filter));
output_damage_whole(output);
}
}
if (oc && (oc->subpixel != WL_OUTPUT_SUBPIXEL_UNKNOWN || config->reloading)) {
sway_log(SWAY_DEBUG, "Set %s subpixel to %s", oc->name,
sway_wl_output_subpixel_to_string(oc->subpixel));
wlr_output_set_subpixel(wlr_output, oc->subpixel);
output_damage_whole(output);
}
if (oc && oc->transform >= 0) {
sway_log(SWAY_DEBUG, "Set %s transform to %d", oc->name, oc->transform);
wlr_output_set_transform(wlr_output, oc->transform);
}
// Find position for it
if (oc && (oc->x != -1 || oc->y != -1)) {
sway_log(SWAY_DEBUG, "Set %s position to %d, %d", oc->name, oc->x, oc->y);
wlr_output_layout_add(root->output_layout, wlr_output, oc->x, oc->y);
} else {
wlr_output_layout_add_auto(root->output_layout, wlr_output);
}
// Update output->{lx, ly, width, height}
struct wlr_box *output_box =
wlr_output_layout_get_box(root->output_layout, wlr_output);
output->lx = output_box->x;
output->ly = output_box->y;
output->width = output_box->width;
output->height = output_box->height;
if (oc && oc->dpms_state == DPMS_OFF) {
sway_log(SWAY_DEBUG, "Turning off screen");
wlr_output_enable(wlr_output, false);
}
if (oc && oc->max_render_time >= 0) {
sway_log(SWAY_DEBUG, "Set %s max render time to %d",
oc->name, oc->max_render_time);
output->max_render_time = oc->max_render_time;
}
return true;
}
static void default_output_config(struct output_config *oc,
struct wlr_output *wlr_output) {
oc->enabled = 1;
struct wlr_output_mode *mode = wlr_output_preferred_mode(wlr_output);
if (mode != NULL) {
oc->width = mode->width;
oc->height = mode->height;
oc->refresh_rate = mode->refresh / 1000.f;
}
oc->x = oc->y = -1;
oc->scale = 0; // auto
oc->scale_filter = SCALE_FILTER_DEFAULT;
struct sway_output *output = wlr_output->data;
oc->subpixel = output->detected_subpixel;
oc->transform = WL_OUTPUT_TRANSFORM_NORMAL;
oc->dpms_state = DPMS_ON;
oc->max_render_time = 0;
}
static struct output_config *get_output_config(char *identifier,
struct sway_output *sway_output) {
const char *name = sway_output->wlr_output->name;
struct output_config *oc_id_on_name = NULL;
struct output_config *oc_name = NULL;
struct output_config *oc_id = NULL;
size_t length = snprintf(NULL, 0, "%s on %s", identifier, name) + 1;
char *id_on_name = malloc(length);
snprintf(id_on_name, length, "%s on %s", identifier, name);
int i = list_seq_find(config->output_configs, output_name_cmp, id_on_name);
if (i >= 0) {
oc_id_on_name = config->output_configs->items[i];
} else {
i = list_seq_find(config->output_configs, output_name_cmp, name);
if (i >= 0) {
oc_name = config->output_configs->items[i];
}
i = list_seq_find(config->output_configs, output_name_cmp, identifier);
if (i >= 0) {
oc_id = config->output_configs->items[i];
}
}
struct output_config *result = new_output_config("temp");
if (config->reloading) {
default_output_config(result, sway_output->wlr_output);
}
if (oc_id_on_name) {
// Already have an identifier on name config, use that
free(result->name);
result->name = strdup(id_on_name);
merge_output_config(result, oc_id_on_name);
} else if (oc_name && oc_id) {
// Generate a config named `<identifier> on <name>` which contains a
// merged copy of the identifier on name. This will make sure that both
// identifier and name configs are respected, with identifier getting
// priority
struct output_config *temp = new_output_config(id_on_name);
merge_output_config(temp, oc_name);
merge_output_config(temp, oc_id);
list_add(config->output_configs, temp);
free(result->name);
result->name = strdup(id_on_name);
merge_output_config(result, temp);
sway_log(SWAY_DEBUG, "Generated output config \"%s\" (enabled: %d)"
" (%dx%d@%fHz position %d,%d scale %f transform %d) (bg %s %s)"
" (dpms %d) (max render time: %d)", result->name, result->enabled,
result->width, result->height, result->refresh_rate,
result->x, result->y, result->scale, result->transform,
result->background, result->background_option, result->dpms_state,
result->max_render_time);
} else if (oc_name) {
// No identifier config, just return a copy of the name config
free(result->name);
result->name = strdup(name);
merge_output_config(result, oc_name);
} else if (oc_id) {
// No name config, just return a copy of the identifier config
free(result->name);
result->name = strdup(identifier);
merge_output_config(result, oc_id);
} else {
i = list_seq_find(config->output_configs, output_name_cmp, "*");
if (i >= 0) {
// No name or identifier config, but there is a wildcard config
free(result->name);
result->name = strdup("*");
merge_output_config(result, config->output_configs->items[i]);
} else if (!config->reloading) {
// No name, identifier, or wildcard config. Since we are not
// reloading with defaults, the output config will be empty, so
// just return NULL
free_output_config(result);
result = NULL;
}
}
free(id_on_name);
return result;
}
struct output_config *find_output_config(struct sway_output *output) {
char id[128];
output_get_identifier(id, sizeof(id), output);
return get_output_config(id, output);
}
void apply_output_config_to_outputs(struct output_config *oc) {
// Try to find the output container and apply configuration now. If
// this is during startup then there will be no container and config
// will be applied during normal "new output" event from wlroots.
bool wildcard = strcmp(oc->name, "*") == 0;
char id[128];
struct sway_output *sway_output;
wl_list_for_each(sway_output, &root->all_outputs, link) {
char *name = sway_output->wlr_output->name;
output_get_identifier(id, sizeof(id), sway_output);
if (wildcard || !strcmp(name, oc->name) || !strcmp(id, oc->name)) {
struct output_config *current = get_output_config(id, sway_output);
if (!current) {
// No stored output config matched, apply oc directly
sway_log(SWAY_DEBUG, "Applying oc directly");
current = new_output_config(oc->name);
merge_output_config(current, oc);
}
apply_output_config(current, sway_output);
free_output_config(current);
if (!wildcard) {
// Stop looking if the output config isn't applicable to all
// outputs
break;
}
}
}
struct sway_seat *seat;
wl_list_for_each(seat, &server.input->seats, link) {
wlr_seat_pointer_clear_focus(seat->wlr_seat);
cursor_rebase(seat->cursor);
}
}
void reset_outputs(void) {
struct output_config *oc = NULL;
int i = list_seq_find(config->output_configs, output_name_cmp, "*");
if (i >= 0) {
oc = config->output_configs->items[i];
} else {
oc = store_output_config(new_output_config("*"));
}
apply_output_config_to_outputs(oc);
}
void free_output_config(struct output_config *oc) {
if (!oc) {
return;
}
free(oc->name);
free(oc->background);
free(oc->background_option);
free(oc);
}
static void handle_swaybg_client_destroy(struct wl_listener *listener,
void *data) {
struct sway_config *sway_config =
wl_container_of(listener, sway_config, swaybg_client_destroy);
wl_list_remove(&sway_config->swaybg_client_destroy.link);
wl_list_init(&sway_config->swaybg_client_destroy.link);
sway_config->swaybg_client = NULL;
}
static bool _spawn_swaybg(char **command) {
if (config->swaybg_client != NULL) {
wl_client_destroy(config->swaybg_client);
}
int sockets[2];
if (socketpair(AF_UNIX, SOCK_STREAM, 0, sockets) != 0) {
sway_log_errno(SWAY_ERROR, "socketpair failed");
return false;
}
if (!sway_set_cloexec(sockets[0], true) || !sway_set_cloexec(sockets[1], true)) {
return false;
}
config->swaybg_client = wl_client_create(server.wl_display, sockets[0]);
if (config->swaybg_client == NULL) {
sway_log_errno(SWAY_ERROR, "wl_client_create failed");
return false;
}
config->swaybg_client_destroy.notify = handle_swaybg_client_destroy;
wl_client_add_destroy_listener(config->swaybg_client,
&config->swaybg_client_destroy);
pid_t pid = fork();
if (pid < 0) {
sway_log_errno(SWAY_ERROR, "fork failed");
return false;
} else if (pid == 0) {
pid = fork();
if (pid < 0) {
sway_log_errno(SWAY_ERROR, "fork failed");
_exit(EXIT_FAILURE);
} else if (pid == 0) {
if (!sway_set_cloexec(sockets[1], false)) {
_exit(EXIT_FAILURE);
}
char wayland_socket_str[16];
snprintf(wayland_socket_str, sizeof(wayland_socket_str),
"%d", sockets[1]);
setenv("WAYLAND_SOCKET", wayland_socket_str, true);
execvp(command[0], command);
sway_log_errno(SWAY_ERROR, "execvp failed");
_exit(EXIT_FAILURE);
}
_exit(EXIT_SUCCESS);
}
if (close(sockets[1]) != 0) {
sway_log_errno(SWAY_ERROR, "close failed");
return false;
}
if (waitpid(pid, NULL, 0) < 0) {
sway_log_errno(SWAY_ERROR, "waitpid failed");
return false;
}
return true;
}
bool spawn_swaybg(void) {
if (!config->swaybg_command) {
return true;
}
size_t length = 2;
for (int i = 0; i < config->output_configs->length; i++) {
struct output_config *oc = config->output_configs->items[i];
if (!oc->background) {
continue;
}
if (strcmp(oc->background_option, "solid_color") == 0) {
length += 4;
} else if (oc->background_fallback) {
length += 8;
} else {
length += 6;
}
}
char **cmd = calloc(length, sizeof(char *));
if (!cmd) {
sway_log(SWAY_ERROR, "Failed to allocate spawn_swaybg command");
return false;
}
size_t i = 0;
cmd[i++] = config->swaybg_command;
for (int j = 0; j < config->output_configs->length; j++) {
struct output_config *oc = config->output_configs->items[j];
if (!oc->background) {
continue;
}
if (strcmp(oc->background_option, "solid_color") == 0) {
cmd[i++] = "-o";
cmd[i++] = oc->name;
cmd[i++] = "-c";
cmd[i++] = oc->background;
} else {
cmd[i++] = "-o";
cmd[i++] = oc->name;
cmd[i++] = "-i";
cmd[i++] = oc->background;
cmd[i++] = "-m";
cmd[i++] = oc->background_option;
if (oc->background_fallback) {
cmd[i++] = "-c";
cmd[i++] = oc->background_fallback;
}
}
assert(i <= length);
}
for (size_t k = 0; k < i; k++) {
sway_log(SWAY_DEBUG, "spawn_swaybg cmd[%zd] = %s", k, cmd[k]);
}
bool result = _spawn_swaybg(cmd);
free(cmd);
return result;
}