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#define _POSIX_C_SOURCE 199309L
#define _XOPEN_SOURCE 500
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <string.h>
#include <unistd.h>
#include <math.h>
#include <assert.h>
#include <wayland-server.h>
#include <wayland-server-protocol.h>
#include <xkbcommon/xkbcommon.h>
#include <GLES2/gl2.h>
#include <wlr/render/matrix.h>
#include <wlr/render/gles2.h>
#include <wlr/render.h>
#include <wlr/backend.h>
#include <wlr/backend/session.h>
#include <wlr/types/wlr_keyboard.h>
#include <wlr/types/wlr_output_layout.h>
#include <wlr/xcursor.h>
#include <wlr/types/wlr_cursor.h>
#include <wlr/util/log.h>
#include <wlr/types/wlr_list.h>
#include "support/shared.h"
#include "support/config.h"
#include "support/cat.h"
struct sample_state;
struct sample_cursor {
struct sample_state *state;
struct wlr_input_device *device;
struct wlr_cursor *cursor;
struct wl_list link;
struct wl_listener cursor_motion;
struct wl_listener cursor_motion_absolute;
struct wl_listener cursor_button;
struct wl_listener cursor_axis;
};
struct sample_state {
struct compositor_state *compositor;
struct example_config *config;
struct wlr_xcursor *xcursor;
float default_color[4];
float clear_color[4];
struct wlr_output_layout *layout;
struct wl_list cursors; // sample_cursor::link
};
static void handle_output_frame(struct output_state *output,
struct timespec *ts) {
struct compositor_state *state = output->compositor;
struct sample_state *sample = state->data;
struct wlr_output *wlr_output = output->output;
wlr_output_make_current(wlr_output);
glClearColor(sample->clear_color[0], sample->clear_color[1],
sample->clear_color[2], sample->clear_color[3]);
glClear(GL_COLOR_BUFFER_BIT);
wlr_output_swap_buffers(wlr_output);
}
static void handle_output_add(struct output_state *ostate) {
struct sample_state *sample = ostate->compositor->data;
struct output_config *o_config =
example_config_get_output(sample->config, ostate->output);
if (o_config) {
wlr_output_transform(ostate->output, o_config->transform);
wlr_output_layout_add(sample->layout, ostate->output, o_config->x,
o_config->y);
} else {
wlr_output_layout_add_auto(sample->layout, ostate->output);
}
struct sample_cursor *cursor;
wl_list_for_each(cursor, &sample->cursors, link) {
example_config_configure_cursor(sample->config, cursor->cursor,
sample->compositor);
struct wlr_xcursor_image *image = sample->xcursor->images[0];
wlr_cursor_set_image(cursor->cursor, image->buffer, image->width,
image->width, image->height, image->hotspot_x, image->hotspot_y, 0);
wlr_cursor_warp(cursor->cursor, NULL, cursor->cursor->x,
cursor->cursor->y);
}
}
static void handle_output_remove(struct output_state *ostate) {
struct sample_state *sample = ostate->compositor->data;
wlr_output_layout_remove(sample->layout, ostate->output);
struct sample_cursor *cursor;
wl_list_for_each(cursor, &sample->cursors, link) {
example_config_configure_cursor(sample->config, cursor->cursor,
sample->compositor);
}
}
static void handle_cursor_motion(struct wl_listener *listener, void *data) {
struct sample_cursor *cursor =
wl_container_of(listener, cursor, cursor_motion);
struct wlr_event_pointer_motion *event = data;
wlr_cursor_move(cursor->cursor, event->device, event->delta_x,
event->delta_y);
}
static void handle_cursor_motion_absolute(struct wl_listener *listener,
void *data) {
struct sample_cursor *cursor =
wl_container_of(listener, cursor, cursor_motion_absolute);
struct wlr_event_pointer_motion_absolute *event = data;
wlr_cursor_warp_absolute(cursor->cursor, event->device,
event->x_mm / event->width_mm, event->y_mm / event->height_mm);
}
static void handle_input_add(struct compositor_state *state,
struct wlr_input_device *device) {
struct sample_state *sample = state->data;
if (device->type != WLR_INPUT_DEVICE_POINTER) {
return;
}
struct sample_cursor *cursor = calloc(1, sizeof(struct sample_cursor));
cursor->state = sample;
cursor->device = device;
cursor->cursor = wlr_cursor_create();
wlr_cursor_attach_output_layout(cursor->cursor, sample->layout);
wlr_cursor_map_to_region(cursor->cursor, sample->config->cursor.mapped_box);
wl_signal_add(&cursor->cursor->events.motion, &cursor->cursor_motion);
cursor->cursor_motion.notify = handle_cursor_motion;
wl_signal_add(&cursor->cursor->events.motion_absolute,
&cursor->cursor_motion_absolute);
cursor->cursor_motion_absolute.notify = handle_cursor_motion_absolute;
wlr_cursor_attach_input_device(cursor->cursor, device);
example_config_configure_cursor(sample->config, cursor->cursor,
sample->compositor);
struct wlr_xcursor_image *image = sample->xcursor->images[0];
wlr_cursor_set_image(cursor->cursor, image->buffer, image->width,
image->width, image->height, image->hotspot_x, image->hotspot_y, 0);
wl_list_insert(&sample->cursors, &cursor->link);
}
static void cursor_destroy(struct sample_cursor *cursor) {
wl_list_remove(&cursor->link);
wl_list_remove(&cursor->cursor_motion.link);
wl_list_remove(&cursor->cursor_motion_absolute.link);
wlr_cursor_destroy(cursor->cursor);
free(cursor);
}
static void handle_input_remove(struct compositor_state *state,
struct wlr_input_device *device) {
struct sample_state *sample = state->data;
struct sample_cursor *cursor;
wl_list_for_each(cursor, &sample->cursors, link) {
if (cursor->device == device) {
cursor_destroy(cursor);
break;
}
}
}
int main(int argc, char *argv[]) {
struct sample_state state = {
.default_color = { 0.25f, 0.25f, 0.25f, 1 },
.clear_color = { 0.25f, 0.25f, 0.25f, 1 },
};
wl_list_init(&state.cursors);
state.config = parse_args(argc, argv);
state.layout = wlr_output_layout_create();
struct compositor_state compositor = { 0 };
compositor.data = &state;
compositor.output_add_cb = handle_output_add;
compositor.output_remove_cb = handle_output_remove;
compositor.output_frame_cb = handle_output_frame;
compositor.input_add_cb = handle_input_add;
compositor.input_remove_cb = handle_input_remove;
state.compositor = &compositor;
struct wlr_xcursor_theme *theme = wlr_xcursor_theme_load("default", 16);
if (!theme) {
wlr_log(L_ERROR, "Failed to load cursor theme");
return 1;
}
state.xcursor = wlr_xcursor_theme_get_cursor(theme, "left_ptr");
if (!state.xcursor) {
wlr_log(L_ERROR, "Failed to load left_ptr cursor");
return 1;
}
compositor_init(&compositor);
if (!wlr_backend_start(compositor.backend)) {
wlr_log(L_ERROR, "Failed to start backend");
wlr_backend_destroy(compositor.backend);
exit(1);
}
wl_display_run(compositor.display);
compositor_fini(&compositor);
struct sample_cursor *cursor, *tmp_cursor;
wl_list_for_each_safe(cursor, tmp_cursor, &state.cursors, link) {
cursor_destroy(cursor);
}
wlr_xcursor_theme_destroy(theme);
example_config_destroy(state.config);
wlr_output_layout_destroy(state.layout);
}
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