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335 lines
8.2 KiB
335 lines
8.2 KiB
/*
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* Copyright © 2011 Benjamin Franzke
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* Copyright © 2011 Intel Corporation
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that copyright
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* notice and this permission notice appear in supporting documentation, and
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* that the name of the copyright holders not be used in advertising or
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* publicity pertaining to distribution of the software without specific,
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* written prior permission. The copyright holders make no representations
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* about the suitability of this software for any purpose. It is provided "as
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* is" without express or implied warranty.
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*
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* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
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* OF THIS SOFTWARE.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdbool.h>
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#include <assert.h>
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#include <unistd.h>
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#include <sys/mman.h>
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#include <wayland-client.h>
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#include "../shared/os-compatibility.h"
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#define ARRAY_LENGTH(a) (sizeof (a) / sizeof (a)[0])
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struct touch {
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struct wl_display *display;
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struct wl_registry *registry;
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struct wl_compositor *compositor;
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struct wl_shell *shell;
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struct wl_shm *shm;
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struct wl_seat *seat;
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struct wl_touch *wl_touch;
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struct wl_pointer *pointer;
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struct wl_keyboard *keyboard;
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struct wl_surface *surface;
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struct wl_shell_surface *shell_surface;
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struct wl_buffer *buffer;
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int has_argb;
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int width, height;
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void *data;
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};
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static void
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create_shm_buffer(struct touch *touch)
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{
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struct wl_shm_pool *pool;
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int fd, size, stride;
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stride = touch->width * 4;
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size = stride * touch->height;
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fd = os_create_anonymous_file(size);
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if (fd < 0) {
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fprintf(stderr, "creating a buffer file for %d B failed: %m\n",
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size);
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exit(1);
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}
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touch->data =
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mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
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if (touch->data == MAP_FAILED) {
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fprintf(stderr, "mmap failed: %m\n");
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close(fd);
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exit(1);
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}
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pool = wl_shm_create_pool(touch->shm, fd, size);
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touch->buffer =
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wl_shm_pool_create_buffer(pool, 0,
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touch->width, touch->height, stride,
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WL_SHM_FORMAT_ARGB8888);
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wl_shm_pool_destroy(pool);
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close(fd);
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}
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static void
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shm_format(void *data, struct wl_shm *wl_shm, uint32_t format)
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{
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struct touch *touch = data;
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if (format == WL_SHM_FORMAT_ARGB8888)
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touch->has_argb = 1;
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}
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struct wl_shm_listener shm_listenter = {
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shm_format
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};
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static void
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touch_paint(struct touch *touch, int32_t x, int32_t y, int32_t id)
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{
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uint32_t *p, c;
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static const uint32_t colors[] = {
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0xffff0000,
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0xffffff00,
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0xff0000ff,
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0xffff00ff,
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0xff00ff00,
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0xff00ffff,
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};
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if (id < (int32_t) ARRAY_LENGTH(colors))
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c = colors[id];
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else
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c = 0xffffffff;
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if (x < 2 || x >= touch->width - 2 ||
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y < 2 || y >= touch->height - 2)
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return;
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p = (uint32_t *) touch->data + (x - 2) + (y - 2) * touch->width;
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p[2] = c;
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p += touch->width;
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p[1] = c;
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p[2] = c;
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p[3] = c;
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p += touch->width;
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p[0] = c;
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p[1] = c;
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p[2] = c;
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p[3] = c;
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p[4] = c;
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p += touch->width;
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p[1] = c;
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p[2] = c;
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p[3] = c;
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p += touch->width;
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p[2] = c;
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wl_surface_damage(touch->surface, x - 2, y - 2, 5, 5);
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/* todo: We could queue up more damage before committing, if there
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* are more input events to handle.
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*/
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wl_surface_commit(touch->surface);
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}
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static void
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touch_handle_down(void *data, struct wl_touch *wl_touch,
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uint32_t serial, uint32_t time, struct wl_surface *surface,
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int32_t id, wl_fixed_t x_w, wl_fixed_t y_w)
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{
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struct touch *touch = data;
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float x = wl_fixed_to_double(x_w);
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float y = wl_fixed_to_double(y_w);
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touch_paint(touch, x, y, id);
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}
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static void
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touch_handle_up(void *data, struct wl_touch *wl_touch,
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uint32_t serial, uint32_t time, int32_t id)
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{
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}
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static void
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touch_handle_motion(void *data, struct wl_touch *wl_touch,
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uint32_t time, int32_t id, wl_fixed_t x_w, wl_fixed_t y_w)
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{
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struct touch *touch = data;
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float x = wl_fixed_to_double(x_w);
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float y = wl_fixed_to_double(y_w);
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touch_paint(touch, x, y, id);
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}
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static void
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touch_handle_frame(void *data, struct wl_touch *wl_touch)
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{
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}
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static void
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touch_handle_cancel(void *data, struct wl_touch *wl_touch)
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{
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}
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static const struct wl_touch_listener touch_listener = {
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touch_handle_down,
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touch_handle_up,
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touch_handle_motion,
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touch_handle_frame,
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touch_handle_cancel,
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};
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static void
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seat_handle_capabilities(void *data, struct wl_seat *seat,
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enum wl_seat_capability caps)
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{
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struct touch *touch = data;
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if ((caps & WL_SEAT_CAPABILITY_TOUCH) && !touch->wl_touch) {
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touch->wl_touch = wl_seat_get_touch(seat);
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wl_touch_set_user_data(touch->wl_touch, touch);
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wl_touch_add_listener(touch->wl_touch, &touch_listener, touch);
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} else if (!(caps & WL_SEAT_CAPABILITY_TOUCH) && touch->wl_touch) {
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wl_touch_destroy(touch->wl_touch);
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touch->wl_touch = NULL;
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}
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}
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static const struct wl_seat_listener seat_listener = {
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seat_handle_capabilities,
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};
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static void
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handle_ping(void *data, struct wl_shell_surface *shell_surface,
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uint32_t serial)
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{
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wl_shell_surface_pong(shell_surface, serial);
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}
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static void
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handle_configure(void *data, struct wl_shell_surface *shell_surface,
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uint32_t edges, int32_t width, int32_t height)
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{
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}
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static void
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handle_popup_done(void *data, struct wl_shell_surface *shell_surface)
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{
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}
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static const struct wl_shell_surface_listener shell_surface_listener = {
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handle_ping,
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handle_configure,
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handle_popup_done
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};
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static void
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handle_global(void *data, struct wl_registry *registry,
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uint32_t name, const char *interface, uint32_t version)
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{
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struct touch *touch = data;
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if (strcmp(interface, "wl_compositor") == 0) {
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touch->compositor =
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wl_registry_bind(registry, name,
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&wl_compositor_interface, 1);
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} else if (strcmp(interface, "wl_shell") == 0) {
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touch->shell =
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wl_registry_bind(registry, name,
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&wl_shell_interface, 1);
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} else if (strcmp(interface, "wl_shm") == 0) {
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touch->shm = wl_registry_bind(registry, name,
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&wl_shm_interface, 1);
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wl_shm_add_listener(touch->shm, &shm_listenter, touch);
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} else if (strcmp(interface, "wl_seat") == 0) {
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touch->seat = wl_registry_bind(registry, name,
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&wl_seat_interface, 1);
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wl_seat_add_listener(touch->seat, &seat_listener, touch);
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}
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}
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static void
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handle_global_remove(void *data, struct wl_registry *registry, uint32_t name)
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{
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}
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static const struct wl_registry_listener registry_listener = {
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handle_global,
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handle_global_remove
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};
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static struct touch *
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touch_create(int width, int height)
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{
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struct touch *touch;
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touch = malloc(sizeof *touch);
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touch->display = wl_display_connect(NULL);
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assert(touch->display);
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touch->has_argb = 0;
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touch->registry = wl_display_get_registry(touch->display);
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wl_registry_add_listener(touch->registry, ®istry_listener, touch);
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wl_display_dispatch(touch->display);
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wl_display_roundtrip(touch->display);
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if (!touch->has_argb) {
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fprintf(stderr, "WL_SHM_FORMAT_ARGB32 not available\n");
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exit(1);
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}
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wl_display_get_fd(touch->display);
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touch->width = width;
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touch->height = height;
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touch->surface = wl_compositor_create_surface(touch->compositor);
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touch->shell_surface = wl_shell_get_shell_surface(touch->shell,
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touch->surface);
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create_shm_buffer(touch);
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if (touch->shell_surface) {
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wl_shell_surface_add_listener(touch->shell_surface,
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&shell_surface_listener, touch);
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wl_shell_surface_set_toplevel(touch->shell_surface);
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}
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wl_surface_set_user_data(touch->surface, touch);
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wl_shell_surface_set_title(touch->shell_surface, "simple-touch");
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memset(touch->data, 64, width * height * 4);
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wl_surface_attach(touch->surface, touch->buffer, 0, 0);
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wl_surface_damage(touch->surface, 0, 0, width, height);
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wl_surface_commit(touch->surface);
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return touch;
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}
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int
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main(int argc, char **argv)
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{
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struct touch *touch;
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int ret = 0;
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touch = touch_create(600, 500);
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while (ret != -1)
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ret = wl_display_dispatch(touch->display);
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return 0;
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}
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