| /* |
| * Copyright © 2011 Benjamin Franzke |
| * Copyright © 2010 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 display { |
| struct wl_display *display; |
| struct wl_compositor *compositor; |
| struct wl_shell *shell; |
| struct wl_shm *shm; |
| uint32_t formats; |
| uint32_t mask; |
| }; |
| |
| struct window { |
| struct display *display; |
| int width, height; |
| struct wl_surface *surface; |
| struct wl_buffer *buffer; |
| void *data; |
| }; |
| |
| static struct wl_buffer * |
| create_shm_buffer(struct display *display, |
| int width, int height, uint32_t format, void **data_out) |
| { |
| char filename[] = "/tmp/wayland-shm-XXXXXX"; |
| struct wl_buffer *buffer; |
| int fd, size, stride; |
| void *data; |
| |
| fd = mkstemp(filename); |
| if (fd < 0) { |
| fprintf(stderr, "open %s failed: %m\n", filename); |
| return NULL; |
| } |
| stride = width * 4; |
| size = stride * height; |
| if (ftruncate(fd, size) < 0) { |
| fprintf(stderr, "ftruncate failed: %m\n"); |
| close(fd); |
| return NULL; |
| } |
| |
| data = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); |
| unlink(filename); |
| |
| if (data == MAP_FAILED) { |
| fprintf(stderr, "mmap failed: %m\n"); |
| close(fd); |
| return NULL; |
| } |
| |
| buffer = wl_shm_create_buffer(display->shm, fd, |
| width, height, stride, format); |
| |
| close(fd); |
| |
| *data_out = data; |
| |
| return buffer; |
| } |
| |
| static struct window * |
| create_window(struct display *display, int width, int height) |
| { |
| struct window *window; |
| |
| window = malloc(sizeof *window); |
| window->display = display; |
| window->width = width; |
| window->height = height; |
| window->surface = wl_compositor_create_surface(display->compositor); |
| window->buffer = create_shm_buffer(display, |
| width, height, |
| WL_SHM_FORMAT_XRGB32, |
| &window->data); |
| |
| wl_shell_set_toplevel(display->shell, window->surface); |
| |
| return window; |
| } |
| |
| static const struct wl_callback_listener frame_listener; |
| |
| static void |
| redraw(void *data, struct wl_callback *callback, uint32_t time) |
| { |
| struct window *window = data; |
| uint32_t *p; |
| int i, end, offset; |
| |
| p = window->data; |
| end = window->width * window->height; |
| offset = time >> 4; |
| for (i = 0; i < end; i++) |
| p[i] = (i + offset) * 0x0080401; |
| wl_buffer_damage(window->buffer, 0, 0, window->width, window->height); |
| |
| wl_surface_attach(window->surface, window->buffer, 0, 0); |
| wl_surface_damage(window->surface, |
| 0, 0, window->width, window->height); |
| |
| if (callback) |
| wl_callback_destroy(callback); |
| |
| callback = wl_surface_frame(window->surface); |
| wl_callback_add_listener(callback, &frame_listener, window); |
| } |
| |
| static const struct wl_callback_listener frame_listener = { |
| redraw |
| }; |
| |
| static void |
| shm_format(void *data, struct wl_shm *wl_shm, uint32_t format) |
| { |
| struct display *d = data; |
| |
| d->formats |= (1 << format); |
| } |
| |
| struct wl_shm_listener shm_listenter = { |
| shm_format |
| }; |
| |
| 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->compositor = |
| wl_display_bind(display, id, &wl_compositor_interface); |
| } else if (strcmp(interface, "wl_shell") == 0) { |
| d->shell = wl_display_bind(display, id, &wl_shell_interface); |
| } else if (strcmp(interface, "wl_shm") == 0) { |
| d->shm = wl_display_bind(display, id, &wl_shm_interface); |
| wl_shm_add_listener(d->shm, &shm_listenter, d); |
| } |
| } |
| |
| static int |
| event_mask_update(uint32_t mask, void *data) |
| { |
| struct display *d = data; |
| |
| d->mask = mask; |
| |
| return 0; |
| } |
| |
| static struct display * |
| create_display(void) |
| { |
| struct display *display; |
| |
| display = malloc(sizeof *display); |
| display->display = wl_display_connect(NULL); |
| assert(display->display); |
| |
| display->formats = 0; |
| wl_display_add_global_listener(display->display, |
| display_handle_global, display); |
| wl_display_iterate(display->display, WL_DISPLAY_READABLE); |
| wl_display_roundtrip(display->display); |
| |
| if (!(display->formats & (1 << WL_SHM_FORMAT_XRGB32))) { |
| fprintf(stderr, "WL_SHM_FORMAT_XRGB32 not available\n"); |
| exit(1); |
| } |
| |
| wl_display_get_fd(display->display, event_mask_update, display); |
| |
| return display; |
| } |
| |
| int |
| main(int argc, char **argv) |
| { |
| struct display *display; |
| struct window *window; |
| |
| display = create_display(); |
| window = create_window(display, 250, 250); |
| |
| redraw(window, NULL, 0); |
| |
| while (true) |
| wl_display_iterate(display->display, display->mask); |
| |
| return 0; |
| } |