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#define _POSIX_C_SOURCE 199309L
#define _XOPEN_SOURCE 500
#include <GLES2/gl2.h>
#include <math.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <wayland-server-protocol.h>
#include <wayland-server.h>
#include <wlr/backend.h>
#include <wlr/backend/session.h>
#include <wlr/render/gles2.h>
#include <wlr/render/wlr_renderer.h>
#include <wlr/types/wlr_list.h>
#include <wlr/types/wlr_matrix.h>
#include <wlr/util/log.h>
#include <xkbcommon/xkbcommon.h>
#include "support/cat.h"
#include "support/shared.h"
struct sample_state {
struct wlr_renderer *renderer;
struct wlr_texture *cat_texture;
struct wl_list touch_points;
};
struct touch_point {
int32_t touch_id;
double x, y;
struct wl_list 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;
int32_t width, height;
wlr_output_effective_resolution(wlr_output, &width, &height);
wlr_output_make_current(wlr_output, NULL);
wlr_renderer_begin(sample->renderer, wlr_output->width, wlr_output->height);
wlr_renderer_clear(sample->renderer, (float[]){0.25f, 0.25f, 0.25f, 1});
int tex_width, tex_height;
wlr_texture_get_size(sample->cat_texture, &tex_width, &tex_height);
struct touch_point *p;
wl_list_for_each(p, &sample->touch_points, link) {
int x = (int)(p->x * width) - tex_width / 2;
int y = (int)(p->y * height) - tex_height / 2;
wlr_render_texture(sample->renderer, sample->cat_texture,
wlr_output->transform_matrix, x, y, 1.0f);
}
wlr_renderer_end(sample->renderer);
wlr_output_swap_buffers(wlr_output, NULL, NULL);
}
static void handle_touch_down(struct touch_state *tstate,
int32_t touch_id, double x, double y) {
struct sample_state *sample = tstate->compositor->data;
struct touch_point *point = calloc(1, sizeof(struct touch_point));
point->touch_id = touch_id;
point->x = x;
point->y = y;
wl_list_insert(&sample->touch_points, &point->link);
}
static void handle_touch_up(struct touch_state *tstate, int32_t touch_id) {
struct sample_state *sample = tstate->compositor->data;
struct touch_point *point, *tmp;
wl_list_for_each_safe(point, tmp, &sample->touch_points, link) {
if (point->touch_id == touch_id) {
wl_list_remove(&point->link);
break;
}
}
}
static void handle_touch_motion(struct touch_state *tstate,
int32_t touch_id, double x, double y) {
struct sample_state *sample = tstate->compositor->data;
struct touch_point *point;
wl_list_for_each(point, &sample->touch_points, link) {
if (point->touch_id == touch_id) {
point->x = x;
point->y = y;
break;
}
}
}
int main(int argc, char *argv[]) {
wlr_log_init(L_DEBUG, NULL);
struct sample_state state;
wl_list_init(&state.touch_points);
struct compositor_state compositor = { 0,
.data = &state,
.output_frame_cb = handle_output_frame,
.touch_down_cb = handle_touch_down,
.touch_up_cb = handle_touch_up,
.touch_motion_cb = handle_touch_motion,
};
compositor_init(&compositor);
struct wlr_egl *egl = wlr_backend_get_egl(compositor.backend);
state.renderer = wlr_gles2_renderer_create(egl);
if (!state.renderer) {
wlr_log(L_ERROR, "Could not start compositor, OOM");
exit(EXIT_FAILURE);
}
state.cat_texture = wlr_texture_from_pixels(state.renderer,
WL_SHM_FORMAT_ARGB8888, cat_tex.width * 4, cat_tex.width, cat_tex.height,
cat_tex.pixel_data);
if (!state.cat_texture) {
wlr_log(L_ERROR, "Could not start compositor, OOM");
exit(EXIT_FAILURE);
}
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);
wlr_texture_destroy(state.cat_texture);
wlr_renderer_destroy(state.renderer);
compositor_fini(&compositor);
}
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