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/*
* Copyright © 2011 Benjamin Franzke
*
* 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 <stddef.h>
#include <stdint.h>
#include <stdbool.h>
#include <assert.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/mman.h>
#include <wayland-client.h>
struct display {
struct wl_display *display;
struct {
struct wl_compositor *compositor;
struct wl_shm *shm;
} interface;
uint32_t mask;
};
struct window {
struct display *display;
struct {
int width, height;
} geometry;
struct {
struct wl_buffer *buffer;
struct wl_surface *surface;
uint8_t *data;
int length;
int stride;
} shm_surface;
};
static void
redraw(struct wl_surface *surface, void *data, uint32_t time)
{
struct window *window = data;
uint32_t *pixel;
int x,y;
int a;
for (y = 0; y < window->geometry.height; ++y) {
pixel = (uint32_t *) (window->shm_surface.data +
y * window->shm_surface.stride);
a = 255 - y;
for (x = 0; x < window->geometry.width; ++x, ++pixel) {
if (x < 85)
*pixel = (a << 24) | ((x + 170) << 16);
else if (x < 170)
*pixel = (a << 24) | ((x + 85) << 8);
else
*pixel = (a << 24) | (x);
}
}
wl_buffer_damage(window->shm_surface.buffer, 0, 0,
window->geometry.width, window->geometry.height);
wl_surface_damage(window->shm_surface.surface, 0, 0,
window->geometry.width, window->geometry.height);
/* wl_display_frame_callback(window->display->display, redraw, window); */
}
static void
create_surface(struct window *window)
{
struct display *display = window->display;
struct wl_visual *visual;
int fd;
char filename[] = "/tmp/wayland-shm-XXXXXX";
window->shm_surface.surface =
wl_compositor_create_surface(display->interface.compositor);
#if 0
window->shm_surface.stride = window->geometry.width * 4;
#else
window->shm_surface.stride = window->geometry.width * 4 + 4;
#endif
window->shm_surface.length =
window->shm_surface.stride * window->geometry.height;
fd = mkstemp(filename);
if (fd < 0) {
fprintf(stderr, "open %s failed: %m\n", filename);
exit(1);
}
if (ftruncate(fd, window->shm_surface.length) < 0) {
fprintf(stderr, "ftruncate failed: %m");
close(fd);
exit(1);
}
window->shm_surface.data =
mmap(NULL, window->shm_surface.length,
PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
unlink(filename);
if (window->shm_surface.data == MAP_FAILED) {
fprintf(stderr, "mmap failed: %m\n");
exit(1);
}
visual = wl_display_get_argb_visual(display->display);
window->shm_surface.buffer =
wl_shm_create_buffer(display->interface.shm, fd,
window->geometry.width,
window->geometry.height,
window->shm_surface.stride, visual);
close(fd);
redraw(window->shm_surface.surface, window, 0);
wl_surface_attach(window->shm_surface.surface,
window->shm_surface.buffer, 0, 0);
wl_surface_map_toplevel(window->shm_surface.surface);
}
static void
display_handle_global(struct wl_display *display, uint32_t id,
const char *interface, uint32_t version, void *data)
{
struct display *d = data;
if (strcmp(interface, "wl_compositor") == 0) {
d->interface.compositor = wl_compositor_create(display, id, 1);
} else if (strcmp(interface, "wl_shm") == 0) {
d->interface.shm = wl_shm_create(display, id, 1);
}
}
static int
event_mask_update(uint32_t mask, void *data)
{
struct display *d = data;
d->mask = mask;
return 0;
}
int
main(int argc, char **argv)
{
struct display display = { 0 };
struct window window = { 0 };
memset(&display, 0, sizeof display);
memset(&window, 0, sizeof window);
window.display = &display;
window.geometry.width = 256;
window.geometry.height = 256;
display.display = wl_display_connect(NULL);
assert(display.display);
wl_display_add_global_listener(display.display,
display_handle_global, &display);
/* process connection events */
wl_display_iterate(display.display, WL_DISPLAY_READABLE);
create_surface(&window);
wl_display_get_fd(display.display, event_mask_update, &display);
while (true)
wl_display_iterate(display.display, display.mask);
return 0;
}
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