weston/clients/simple-touch.c

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/*
* Copyright © 2011 Benjamin Franzke
* Copyright © 2011 Intel Corporation
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that copyright
* notice and this permission notice appear in supporting documentation, and
* that the name of the copyright holders not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. The copyright holders make no representations
* about the suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
* OF THIS SOFTWARE.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#include <assert.h>
#include <unistd.h>
#include <sys/mman.h>
#include <wayland-client.h>
#include <wayland-egl.h>
struct touch {
struct wl_display *display;
struct wl_compositor *compositor;
struct wl_shell *shell;
struct wl_shm *shm;
struct wl_input_device *input_device;
struct wl_surface *surface;
struct wl_shell_surface *shell_surface;
struct wl_buffer *buffer;
int has_argb;
uint32_t mask;
int width, height;
void *data;
};
static void
create_shm_buffer(struct touch *touch)
{
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struct wl_shm_pool *pool;
char filename[] = "/tmp/wayland-shm-XXXXXX";
int fd, size, stride;
fd = mkstemp(filename);
if (fd < 0) {
fprintf(stderr, "open %s failed: %m\n", filename);
exit(1);
}
stride = touch->width * 4;
size = stride * touch->height;
if (ftruncate(fd, size) < 0) {
fprintf(stderr, "ftruncate failed: %m\n");
close(fd);
exit(1);
}
touch->data =
mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
unlink(filename);
if (touch->data == MAP_FAILED) {
fprintf(stderr, "mmap failed: %m\n");
close(fd);
exit(1);
}
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pool = wl_shm_create_pool(touch->shm, fd, size);
touch->buffer =
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wl_shm_pool_create_buffer(pool, 0,
touch->width, touch->height, stride,
WL_SHM_FORMAT_ARGB8888);
wl_shm_pool_destroy(pool);
close(fd);
}
static void
shm_format(void *data, struct wl_shm *wl_shm, uint32_t format)
{
struct touch *touch = data;
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if (format == WL_SHM_FORMAT_ARGB8888)
touch->has_argb = 1;
}
struct wl_shm_listener shm_listenter = {
shm_format
};
static void
input_device_handle_motion(void *data, struct wl_input_device *input_device,
uint32_t time, int32_t sx, int32_t sy)
{
}
static void
input_device_handle_button(void *data,
struct wl_input_device *input_device,
uint32_t serial, uint32_t time,
uint32_t button, uint32_t state)
{
}
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static void
input_device_handle_axis(void *data, struct wl_input_device *input_device,
uint32_t time, uint32_t axis, int32_t value)
{
}
static void
input_device_handle_key(void *data, struct wl_input_device *input_device,
uint32_t serial, uint32_t time,
uint32_t key, uint32_t state)
{
}
static void
input_device_handle_pointer_enter(void *data,
struct wl_input_device *input_device,
uint32_t serial, struct wl_surface *surface,
int32_t sx, int32_t sy)
{
}
static void
input_device_handle_pointer_leave(void *data,
struct wl_input_device *input_device,
uint32_t serial, struct wl_surface *surface)
{
}
static void
input_device_handle_keyboard_enter(void *data,
struct wl_input_device *input_device,
uint32_t serial,
struct wl_surface *surface,
struct wl_array *keys)
{
}
static void
input_device_handle_keyboard_leave(void *data,
struct wl_input_device *input_device,
uint32_t serial,
struct wl_surface *surface)
{
}
static void
touch_paint(struct touch *touch, int32_t x, int32_t y, int32_t id)
{
uint32_t *p, c;
static const uint32_t colors[] = {
0xffff0000,
0xffffff00,
0xff0000ff,
0xffff00ff,
};
if (id < (int32_t) ARRAY_LENGTH(colors))
c = colors[id];
else
c = 0xffffffff;
if (x < 1 || touch->width - 1 < x ||
y < 1 || touch->height - 1 < y)
return;
p = (uint32_t *) touch->data + (x - 1) + (y -1 ) * touch->width;
p[1] = c;
p += touch->width;
p[0] = c;
p[1] = c;
p[2] = c;
p += touch->width;
p[1] = c;
wl_surface_damage(touch->surface, 0, 0, touch->width, touch->height);
}
static void
input_device_handle_touch_down(void *data,
struct wl_input_device *wl_input_device,
uint32_t serial, uint32_t time,
struct wl_surface *surface,
int32_t id, int32_t x, int32_t y)
{
struct touch *touch = data;
touch_paint(touch, x, y, id);
}
static void
input_device_handle_touch_up(void *data,
struct wl_input_device *wl_input_device,
uint32_t serial, uint32_t time, int32_t id)
{
}
static void
input_device_handle_touch_motion(void *data,
struct wl_input_device *wl_input_device,
uint32_t time,
int32_t id, int32_t x, int32_t y)
{
struct touch *touch = data;
touch_paint(touch, x, y, id);
}
static void
input_device_handle_touch_frame(void *data,
struct wl_input_device *wl_input_device)
{
}
static void
input_device_handle_touch_cancel(void *data,
struct wl_input_device *wl_input_device)
{
}
static const struct wl_input_device_listener input_device_listener = {
input_device_handle_motion,
input_device_handle_button,
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input_device_handle_axis,
input_device_handle_key,
input_device_handle_pointer_enter,
input_device_handle_pointer_leave,
input_device_handle_keyboard_enter,
input_device_handle_keyboard_leave,
input_device_handle_touch_down,
input_device_handle_touch_up,
input_device_handle_touch_motion,
input_device_handle_touch_frame,
input_device_handle_touch_cancel,
};
static void
handle_global(struct wl_display *display, uint32_t id,
const char *interface, uint32_t version, void *data)
{
struct touch *touch = data;
if (strcmp(interface, "wl_compositor") == 0) {
touch->compositor =
wl_display_bind(display, id, &wl_compositor_interface);
} else if (strcmp(interface, "wl_shell") == 0) {
touch->shell =
wl_display_bind(display, id, &wl_shell_interface);
} else if (strcmp(interface, "wl_shm") == 0) {
touch->shm = wl_display_bind(display, id, &wl_shm_interface);
wl_shm_add_listener(touch->shm, &shm_listenter, touch);
} else if (strcmp(interface, "wl_input_device") == 0) {
touch->input_device =
wl_display_bind(display, id,
&wl_input_device_interface);
wl_input_device_add_listener(touch->input_device,
&input_device_listener, touch);
}
}
static int
event_mask_update(uint32_t mask, void *data)
{
struct touch *touch = data;
touch->mask = mask;
return 0;
}
static struct touch *
touch_create(int width, int height)
{
struct touch *touch;
touch = malloc(sizeof *touch);
touch->display = wl_display_connect(NULL);
assert(touch->display);
touch->has_argb = 0;
wl_display_add_global_listener(touch->display, handle_global, touch);
wl_display_iterate(touch->display, WL_DISPLAY_READABLE);
wl_display_roundtrip(touch->display);
if (!touch->has_argb) {
fprintf(stderr, "WL_SHM_FORMAT_ARGB32 not available\n");
exit(1);
}
wl_display_get_fd(touch->display, event_mask_update, touch);
touch->width = width;
touch->height = height;
touch->surface = wl_compositor_create_surface(touch->compositor);
touch->shell_surface = wl_shell_get_shell_surface(touch->shell,
touch->surface);
create_shm_buffer(touch);
wl_shell_surface_set_toplevel(touch->shell_surface);
wl_surface_set_user_data(touch->surface, touch);
memset(touch->data, 64, width * height * 4);
wl_surface_attach(touch->surface, touch->buffer, 0, 0);
wl_surface_damage(touch->surface, 0, 0, width, height);
return touch;
}
int
main(int argc, char **argv)
{
struct touch *touch;
touch = touch_create(600, 500);
while (true)
wl_display_iterate(touch->display, touch->mask);
return 0;
}