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#include <ctype.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <wayland-client.h>
#include <wlr/util/log.h>
#include "buffer_pool.h"
#include "cairo.h"
#include "util.h"
#include "wlr-layer-shell-unstable-v1-client-protocol.h"
enum scaling_mode {
SCALING_MODE_STRETCH,
SCALING_MODE_FILL,
SCALING_MODE_FIT,
SCALING_MODE_CENTER,
SCALING_MODE_TILE,
SCALING_MODE_SOLID_COLOR,
};
struct swaybg_args {
int output_idx;
const char *path;
enum scaling_mode mode;
};
struct swaybg_state {
const struct swaybg_args *args;
struct wl_display *display;
struct wl_compositor *compositor;
struct zwlr_layer_shell_v1 *layer_shell;
struct wl_shm *shm;
struct wl_output *output;
struct wl_surface *surface;
struct zwlr_layer_surface_v1 *layer_surface;
bool run_display;
uint32_t width, height;
struct pool_buffer buffers[2];
struct pool_buffer *current_buffer;
};
bool is_valid_color(const char *color) {
int len = strlen(color);
if (len != 7 || color[0] != '#') {
wlr_log(L_ERROR, "%s is not a valid color for swaybg. "
"Color should be specified as #rrggbb (no alpha).", color);
return false;
}
int i;
for (i = 1; i < len; ++i) {
if (!isxdigit(color[i])) {
return false;
}
}
return true;
}
static void render_frame(struct swaybg_state *state) {
if (!state->run_display) {
return;
}
state->current_buffer = get_next_buffer(state->shm,
state->buffers, state->width, state->height);
cairo_t *cairo = state->current_buffer->cairo;
switch (state->args->mode) {
case SCALING_MODE_SOLID_COLOR:
cairo_set_source_u32(cairo, parse_color(state->args->path));
cairo_paint(cairo);
break;
default:
exit(1);
break;
}
wl_surface_attach(state->surface, state->current_buffer->buffer, 0, 0);
wl_surface_damage(state->surface, 0, 0, state->width, state->height);
wl_surface_commit(state->surface);
}
static void layer_surface_configure(void *data,
struct zwlr_layer_surface_v1 *surface,
uint32_t serial, uint32_t width, uint32_t height) {
struct swaybg_state *state = data;
state->width = width;
state->height = height;
render_frame(state);
zwlr_layer_surface_v1_ack_configure(surface, serial);
}
static void layer_surface_closed(void *data,
struct zwlr_layer_surface_v1 *surface) {
struct swaybg_state *state = data;
zwlr_layer_surface_v1_destroy(state->layer_surface);
wl_surface_destroy(state->surface);
state->run_display = false;
}
struct zwlr_layer_surface_v1_listener layer_surface_listener = {
.configure = layer_surface_configure,
.closed = layer_surface_closed,
};
static void handle_global(void *data, struct wl_registry *registry,
uint32_t name, const char *interface, uint32_t version) {
struct swaybg_state *state = data;
if (strcmp(interface, wl_compositor_interface.name) == 0) {
state->compositor = wl_registry_bind(registry, name,
&wl_compositor_interface, 1);
} else if (strcmp(interface, wl_shm_interface.name) == 0) {
state->shm = wl_registry_bind(registry, name,
&wl_shm_interface, 1);
} else if (strcmp(interface, wl_output_interface.name) == 0) {
static int output_idx = 0;
if (output_idx == state->args->output_idx) {
state->output = wl_registry_bind(registry, name,
&wl_output_interface, 1);
}
output_idx++;
} else if (strcmp(interface, zwlr_layer_shell_v1_interface.name) == 0) {
state->layer_shell = wl_registry_bind(
registry, name, &zwlr_layer_shell_v1_interface, 1);
}
}
static void handle_global_remove(void *data, struct wl_registry *registry,
uint32_t name) {
// who cares
}
static const struct wl_registry_listener registry_listener = {
.global = handle_global,
.global_remove = handle_global_remove,
};
int main(int argc, const char **argv) {
struct swaybg_args args = {0};
struct swaybg_state state = {0};
state.args = &args;
wlr_log_init(L_DEBUG, NULL);
if (argc != 4) {
wlr_log(L_ERROR, "Do not run this program manually. "
"See man 5 sway and look for output options.");
return 1;
}
args.output_idx = atoi(argv[1]);
args.path = argv[2];
args.mode = atoi(argv[3]);
args.mode = SCALING_MODE_STRETCH;
if (strcmp(argv[3], "stretch") == 0) {
args.mode = SCALING_MODE_STRETCH;
} else if (strcmp(argv[3], "fill") == 0) {
args.mode = SCALING_MODE_FILL;
} else if (strcmp(argv[3], "fit") == 0) {
args.mode = SCALING_MODE_FIT;
} else if (strcmp(argv[3], "center") == 0) {
args.mode = SCALING_MODE_CENTER;
} else if (strcmp(argv[3], "tile") == 0) {
args.mode = SCALING_MODE_TILE;
} else if (strcmp(argv[3], "solid_color") == 0) {
args.mode = SCALING_MODE_SOLID_COLOR;
} else {
wlr_log(L_ERROR, "Unsupported scaling mode: %s", argv[3]);
return 1;
}
state.display = wl_display_connect(NULL);
if (!state.display) {
wlr_log(L_ERROR, "Failed to create display\n");
return 1;
}
struct wl_registry *registry = wl_display_get_registry(state.display);
wl_registry_add_listener(registry, ®istry_listener, &state);
wl_display_roundtrip(state.display);
if (!state.compositor) {
wlr_log(L_DEBUG, "wl-compositor not available");
return 1;
}
if (!state.layer_shell) {
wlr_log(L_ERROR, "layer-shell not available");
return 1;
}
state.surface = wl_compositor_create_surface(state.compositor);
if (!state.surface) {
wlr_log(L_ERROR, "failed to create wl_surface");
return 1;
}
state.layer_surface = zwlr_layer_shell_v1_get_layer_surface(
state.layer_shell, state.surface, state.output,
ZWLR_LAYER_SHELL_V1_LAYER_BACKGROUND, "wallpaper");
if (!state.layer_surface) {
wlr_log(L_ERROR, "failed to create zwlr_layer_surface");
return 1;
}
zwlr_layer_surface_v1_set_size(state.layer_surface, 0, 0);
zwlr_layer_surface_v1_set_anchor(state.layer_surface,
ZWLR_LAYER_SURFACE_V1_ANCHOR_TOP |
ZWLR_LAYER_SURFACE_V1_ANCHOR_RIGHT |
ZWLR_LAYER_SURFACE_V1_ANCHOR_BOTTOM |
ZWLR_LAYER_SURFACE_V1_ANCHOR_LEFT);
zwlr_layer_surface_v1_add_listener(state.layer_surface,
&layer_surface_listener, &state);
wl_surface_commit(state.surface);
wl_display_roundtrip(state.display);
state.run_display = true;
render_frame(&state);
while (wl_display_dispatch(state.display) != -1 && state.run_display) {
// This space intentionally left blank
}
return 0;
}
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