diff options
Diffstat (limited to 'examples/tablet.c')
| -rw-r--r-- | examples/tablet.c | 381 |
1 files changed, 381 insertions, 0 deletions
diff --git a/examples/tablet.c b/examples/tablet.c new file mode 100644 index 00000000..fad30d52 --- /dev/null +++ b/examples/tablet.c @@ -0,0 +1,381 @@ +#define _XOPEN_SOURCE 600 +#include <GLES2/gl2.h> +#include <math.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/wlr_renderer.h> +#include <wlr/types/wlr_box.h> +#include <wlr/types/wlr_matrix.h> +#include <wlr/types/wlr_output.h> +#include <wlr/types/wlr_input_device.h> +#include <wlr/types/wlr_tablet_pad.h> +#include <wlr/types/wlr_tablet_tool.h> +#include <wlr/util/log.h> +#include <xkbcommon/xkbcommon.h> + +struct sample_state { + struct wl_display *display; + struct wlr_renderer *renderer; + bool proximity, tap, button; + double distance; + double pressure; + double x, y; + double x_tilt, y_tilt; + double width_mm, height_mm; + double ring; + struct wl_list link; + float tool_color[4]; + float pad_color[4]; + struct timespec last_frame; + struct wl_listener new_output; + struct wl_listener new_input; + struct wl_list tablet_tools; + struct wl_list tablet_pads; +}; + +struct tablet_tool_state { + struct sample_state *sample; + struct wlr_input_device *device; + struct wl_listener destroy; + struct wl_listener axis; + struct wl_listener proximity; + struct wl_listener tip; + struct wl_listener button; + struct wl_list link; + void *data; +}; + +struct tablet_pad_state { + struct sample_state *sample; + struct wlr_input_device *device; + struct wl_listener destroy; + struct wl_listener button; + struct wl_listener ring; + 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 wlr_output *wlr_output = sample_output->output; + struct timespec now; + clock_gettime(CLOCK_MONOTONIC, &now); + + 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}); + + float distance = 0.8f * (1 - sample->distance); + float tool_color[4] = { distance, distance, distance, 1 }; + for (size_t i = 0; sample->button && i < 4; ++i) { + tool_color[i] = sample->tool_color[i]; + } + float scale = 4; + + float pad_width = sample->width_mm * scale; + float pad_height = sample->height_mm * scale; + float left = width / 2.0f - pad_width / 2.0f; + float top = height / 2.0f - pad_height / 2.0f; + const struct wlr_box box = { + .x = left, .y = top, + .width = pad_width, .height = pad_height, + }; + wlr_render_rect(sample->renderer, &box, sample->pad_color, + wlr_output->transform_matrix); + + if (sample->proximity) { + struct wlr_box box = { + .x = (sample->x * pad_width) - 8 * (sample->pressure + 1) + left, + .y = (sample->y * pad_height) - 8 * (sample->pressure + 1) + top, + .width = 16 * (sample->pressure + 1), + .height = 16 * (sample->pressure + 1), + }; + float matrix[9]; + wlr_matrix_project_box(matrix, &box, WL_OUTPUT_TRANSFORM_NORMAL, + sample->ring, wlr_output->transform_matrix); + wlr_render_quad_with_matrix(sample->renderer, tool_color, matrix); + + box.x += sample->x_tilt; + box.y += sample->y_tilt; + box.width /= 2; + box.height /= 2; + wlr_render_rect(sample->renderer, &box, tool_color, + wlr_output->transform_matrix); + } + + wlr_renderer_end(sample->renderer); + wlr_output_swap_buffers(wlr_output, NULL, NULL); + sample->last_frame = now; +} + +static void tablet_tool_axis_notify(struct wl_listener *listener, void *data) { + struct tablet_tool_state *tstate = wl_container_of(listener, tstate, axis); + struct wlr_event_tablet_tool_axis *event = data; + struct sample_state *sample = tstate->sample; + if ((event->updated_axes & WLR_TABLET_TOOL_AXIS_X)) { + sample->x = event->x; + } + if ((event->updated_axes & WLR_TABLET_TOOL_AXIS_Y)) { + sample->y = event->y; + } + if ((event->updated_axes & WLR_TABLET_TOOL_AXIS_DISTANCE)) { + sample->distance = event->distance; + } + if ((event->updated_axes & WLR_TABLET_TOOL_AXIS_PRESSURE)) { + sample->pressure = event->pressure; + } + if ((event->updated_axes & WLR_TABLET_TOOL_AXIS_TILT_X)) { + sample->x_tilt = event->tilt_x; + } + if ((event->updated_axes & WLR_TABLET_TOOL_AXIS_TILT_Y)) { + sample->y_tilt = event->tilt_y; + } +} + +static void tablet_tool_proximity_notify(struct wl_listener *listener, void *data) { + struct tablet_tool_state *tstate = wl_container_of(listener, tstate, proximity); + struct wlr_event_tablet_tool_proximity *event = data; + struct sample_state *sample = tstate->sample; + sample->proximity = event->state == WLR_TABLET_TOOL_PROXIMITY_IN; +} + +static void tablet_tool_button_notify(struct wl_listener *listener, void *data) { + struct tablet_tool_state *tstate = wl_container_of(listener, tstate, button); + struct wlr_event_tablet_tool_button *event = data; + struct sample_state *sample = tstate->sample; + if (event->state == WLR_BUTTON_RELEASED) { + sample->button = false; + } else { + sample->button = true; + for (size_t i = 0; i < 3; ++i) { + if (event->button % 3 == i) { + sample->tool_color[i] = 0; + } else { + sample->tool_color[i] = 1; + } + } + } +} + +static void tablet_pad_button_notify(struct wl_listener *listener, void *data) { + struct tablet_pad_state *pstate = wl_container_of(listener, pstate, button); + struct wlr_event_tablet_pad_button *event = data; + struct sample_state *sample = pstate->sample; + float default_color[4] = { 0.5, 0.5, 0.5, 1.0 }; + if (event->state == WLR_BUTTON_RELEASED) { + memcpy(sample->pad_color, default_color, sizeof(default_color)); + } else { + for (size_t i = 0; i < 3; ++i) { + if (event->button % 3 == i) { + sample->pad_color[i] = 0; + } else { + sample->pad_color[i] = 1; + } + } + } +} + +static void tablet_pad_ring_notify(struct wl_listener *listener, void *data) { + struct tablet_pad_state *pstate = wl_container_of(listener, pstate, ring); + struct wlr_event_tablet_pad_ring *event = data; + struct sample_state *sample = pstate->sample; + if (event->position != -1) { + sample->ring = -(event->position * (M_PI / 180.0)); + } +} + +static void tablet_tool_destroy_notify(struct wl_listener *listener, void *data) { + struct tablet_tool_state *tstate = wl_container_of(listener, tstate, destroy); + wl_list_remove(&tstate->link); + wl_list_remove(&tstate->destroy.link); + wl_list_remove(&tstate->axis.link); + wl_list_remove(&tstate->proximity.link); + wl_list_remove(&tstate->button.link); + free(tstate); +} + +static void tablet_pad_destroy_notify(struct wl_listener *listener, void *data) { + struct tablet_pad_state *pstate = wl_container_of(listener, pstate, destroy); + wl_list_remove(&pstate->link); + wl_list_remove(&pstate->destroy.link); + wl_list_remove(&pstate->ring.link); + wl_list_remove(&pstate->button.link); + free(pstate); +} + +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_TABLET_PAD:; + struct tablet_pad_state *pstate = calloc(sizeof(struct tablet_pad_state), 1); + pstate->device = device; + pstate->sample = sample; + pstate->destroy.notify = tablet_pad_destroy_notify; + wl_signal_add(&device->events.destroy, &pstate->destroy); + pstate->button.notify = tablet_pad_button_notify; + wl_signal_add(&device->tablet_pad->events.button, &pstate->button); + pstate->ring.notify = tablet_pad_ring_notify; + wl_signal_add(&device->tablet_pad->events.ring, &pstate->ring); + wl_list_insert(&sample->tablet_pads, &pstate->link); + break; + case WLR_INPUT_DEVICE_TABLET_TOOL: + sample->width_mm = device->width_mm == 0 ? + 20 : device->width_mm; + sample->height_mm = device->height_mm == 0 ? + 10 : device->height_mm; + + struct tablet_tool_state *tstate = calloc(sizeof(struct tablet_tool_state), 1); + tstate->device = device; + tstate->sample = sample; + tstate->destroy.notify = tablet_tool_destroy_notify; + wl_signal_add(&device->events.destroy, &tstate->destroy); + tstate->axis.notify = tablet_tool_axis_notify; + wl_signal_add(&device->tablet->events.axis, &tstate->axis); + tstate->proximity.notify = tablet_tool_proximity_notify; + wl_signal_add(&device->tablet->events.proximity, &tstate->proximity); + tstate->button.notify = tablet_tool_button_notify; + wl_signal_add(&device->tablet->events.button, &tstate->button); + wl_list_insert(&sample->tablet_tools, &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, + .tool_color = { 1, 1, 1, 1 }, + .pad_color = { 0.5, 0.5, 0.5, 1.0 } + }; + wl_list_init(&state.tablet_pads); + wl_list_init(&state.tablet_tools); + 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); + } + if (!wlr_backend_start(wlr)) { + wlr_log(WLR_ERROR, "Failed to start backend"); + wlr_backend_destroy(wlr); + exit(1); + } + wl_display_run(display); + + wl_display_destroy(display); +} |