diff options
Diffstat (limited to 'examples/touch.c')
| -rw-r--r-- | examples/touch.c | 286 |
1 files changed, 286 insertions, 0 deletions
diff --git a/examples/touch.c b/examples/touch.c new file mode 100644 index 00000000..9ed20a28 --- /dev/null +++ b/examples/touch.c @@ -0,0 +1,286 @@ +#define _POSIX_C_SOURCE 200112L +#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/types/wlr_output.h> +#include <wlr/render/wlr_renderer.h> +#include <wlr/types/wlr_list.h> +#include <wlr/types/wlr_input_device.h> +#include <wlr/types/wlr_matrix.h> +#include <wlr/util/log.h> +#include <xkbcommon/xkbcommon.h> +#include "cat.h" + +struct sample_state { + struct wl_display *display; + struct wlr_renderer *renderer; + struct wlr_texture *cat_texture; + struct wl_list touch_points; + struct timespec last_frame; + struct wl_listener new_output; + struct wl_listener new_input; + struct wl_list touch; +}; + +struct touch_point { + int32_t touch_id; + double x, y; + struct wl_list link; +}; + +struct touch_state { + struct sample_state *sample; + struct wlr_input_device *device; + struct wl_listener destroy; + struct wl_listener down; + struct wl_listener up; + struct wl_listener motion; + struct wl_list link; + void *data; +}; + +struct sample_output { + struct sample_state *sample; + struct wlr_output *output; + struct wl_listener frame; + struct wl_listener destroy; +}; + +struct sample_keyboard { + struct sample_state *sample; + struct wlr_input_device *device; + struct wl_listener key; + struct wl_listener destroy; +}; + +static void output_frame_notify(struct wl_listener *listener, void *data) { + struct sample_output *sample_output = wl_container_of(listener, sample_output, frame); + struct sample_state *sample = sample_output->sample; + struct timespec now; + clock_gettime(CLOCK_MONOTONIC, &now); + + struct wlr_output *wlr_output = sample_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); + sample->last_frame = now; +} + +static void touch_down_notify(struct wl_listener *listener, void *data) { + struct wlr_event_touch_motion *event = data; + struct touch_state *tstate = wl_container_of(listener, tstate, down); + struct sample_state *sample = tstate->sample; + struct touch_point *point = calloc(1, sizeof(struct touch_point)); + point->touch_id = event->touch_id; + point->x = event->x; + point->y = event->y; + wl_list_insert(&sample->touch_points, &point->link); +} + +static void touch_up_notify(struct wl_listener *listener, void *data ) { + struct wlr_event_touch_up *event = data; + struct touch_state *tstate = wl_container_of(listener, tstate, up); + struct sample_state *sample = tstate->sample; + struct touch_point *point, *tmp; + wl_list_for_each_safe(point, tmp, &sample->touch_points, link) { + if (point->touch_id == event->touch_id) { + wl_list_remove(&point->link); + break; + } + } +} + +static void touch_motion_notify(struct wl_listener *listener, void *data) { + struct wlr_event_touch_motion *event = data; + struct touch_state *tstate = wl_container_of(listener, tstate, motion); + struct sample_state *sample = tstate->sample; + struct touch_point *point; + wl_list_for_each(point, &sample->touch_points, link) { + if (point->touch_id == event->touch_id) { + point->x = event->x; + point->y = event->y; + break; + } + } +} + +static void touch_destroy_notify(struct wl_listener *listener, void *data) { + struct touch_state *tstate = wl_container_of(listener, tstate, destroy); + wl_list_remove(&tstate->link); + wl_list_remove(&tstate->destroy.link); + wl_list_remove(&tstate->down.link); + wl_list_remove(&tstate->up.link); + wl_list_remove(&tstate->motion.link); + free(tstate); +} + +void output_remove_notify(struct wl_listener *listener, void *data) { + struct sample_output *sample_output = wl_container_of(listener, sample_output, destroy); + wl_list_remove(&sample_output->frame.link); + wl_list_remove(&sample_output->destroy.link); + free(sample_output); +} + +void new_output_notify(struct wl_listener *listener, void *data) { + struct wlr_output *output = data; + struct sample_state *sample = wl_container_of(listener, sample, new_output); + struct sample_output *sample_output = calloc(1, sizeof(struct sample_output)); + if (!wl_list_empty(&output->modes)) { + struct wlr_output_mode *mode = wl_container_of(output->modes.prev, mode, link); + wlr_output_set_mode(output, mode); + } + sample_output->output = output; + sample_output->sample = sample; + wl_signal_add(&output->events.frame, &sample_output->frame); + sample_output->frame.notify = output_frame_notify; + wl_signal_add(&output->events.destroy, &sample_output->destroy); + sample_output->destroy.notify = output_remove_notify; +} + +void keyboard_key_notify(struct wl_listener *listener, void *data) { + struct sample_keyboard *keyboard = wl_container_of(listener, keyboard, key); + struct sample_state *sample = keyboard->sample; + struct wlr_event_keyboard_key *event = data; + uint32_t keycode = event->keycode + 8; + const xkb_keysym_t *syms; + int nsyms = xkb_state_key_get_syms(keyboard->device->keyboard->xkb_state, + keycode, &syms); + for (int i = 0; i < nsyms; i++) { + xkb_keysym_t sym = syms[i]; + if (sym == XKB_KEY_Escape) { + wl_display_terminate(sample->display); + } + } +} + +void keyboard_destroy_notify(struct wl_listener *listener, void *data) { + struct sample_keyboard *keyboard = wl_container_of(listener, keyboard, destroy); + wl_list_remove(&keyboard->destroy.link); + wl_list_remove(&keyboard->key.link); + free(keyboard); +} + +void new_input_notify(struct wl_listener *listener, void *data) { + struct wlr_input_device *device = data; + struct sample_state *sample = wl_container_of(listener, sample, new_input); + switch (device->type) { + case WLR_INPUT_DEVICE_KEYBOARD:; + struct sample_keyboard *keyboard = calloc(1, sizeof(struct sample_keyboard)); + keyboard->device = device; + keyboard->sample = sample; + wl_signal_add(&device->events.destroy, &keyboard->destroy); + keyboard->destroy.notify = keyboard_destroy_notify; + wl_signal_add(&device->keyboard->events.key, &keyboard->key); + keyboard->key.notify = keyboard_key_notify; + struct xkb_rule_names rules = { 0 }; + rules.rules = getenv("XKB_DEFAULT_RULES"); + rules.model = getenv("XKB_DEFAULT_MODEL"); + rules.layout = getenv("XKB_DEFAULT_LAYOUT"); + rules.variant = getenv("XKB_DEFAULT_VARIANT"); + rules.options = getenv("XKB_DEFAULT_OPTIONS"); + struct xkb_context *context = xkb_context_new(XKB_CONTEXT_NO_FLAGS); + if (!context) { + wlr_log(WLR_ERROR, "Failed to create XKB context"); + exit(1); + } + struct xkb_keymap *keymap = xkb_map_new_from_names(context, &rules, + XKB_KEYMAP_COMPILE_NO_FLAGS); + if (!keymap) { + wlr_log(WLR_ERROR, "Failed to create XKB keymap"); + exit(1); + } + wlr_keyboard_set_keymap(device->keyboard, keymap); + xkb_keymap_unref(keymap); + xkb_context_unref(context); + break; + case WLR_INPUT_DEVICE_TOUCH:; + struct touch_state *tstate = calloc(sizeof(struct touch_state), 1); + tstate->device = device; + tstate->sample = sample; + tstate->destroy.notify = touch_destroy_notify; + wl_signal_add(&device->events.destroy, &tstate->destroy); + tstate->down.notify = touch_down_notify; + wl_signal_add(&device->touch->events.down, &tstate->down); + tstate->motion.notify = touch_motion_notify; + wl_signal_add(&device->touch->events.motion, &tstate->motion); + tstate->up.notify = touch_up_notify; + wl_signal_add(&device->touch->events.up, &tstate->up); + wl_list_insert(&sample->touch, &tstate->link); + break; + default: + break; + } +} + + +int main(int argc, char *argv[]) { + wlr_log_init(WLR_DEBUG, NULL); + struct wl_display *display = wl_display_create(); + struct sample_state state = { + .display = display + }; + wl_list_init(&state.touch_points); + wl_list_init(&state.touch); + + struct wlr_backend *wlr = wlr_backend_autocreate(display, NULL); + if (!wlr) { + exit(1); + } + + wl_signal_add(&wlr->events.new_output, &state.new_output); + state.new_output.notify = new_output_notify; + wl_signal_add(&wlr->events.new_input, &state.new_input); + state.new_input.notify = new_input_notify; + clock_gettime(CLOCK_MONOTONIC, &state.last_frame); + + + state.renderer = wlr_backend_get_renderer(wlr); + if (!state.renderer) { + wlr_log(WLR_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(WLR_ERROR, "Could not start compositor, OOM"); + exit(EXIT_FAILURE); + } + + if (!wlr_backend_start(wlr)) { + wlr_log(WLR_ERROR, "Failed to start backend"); + wlr_backend_destroy(wlr); + exit(1); + } + wl_display_run(display); + + wlr_texture_destroy(state.cat_texture); + wl_display_destroy(display); +} |