mirror of
https://gitlab.freedesktop.org/wayland/weston
synced 2024-09-06 18:05:39 +00:00
![Pekka Paalanen](/assets/img/avatar_default.png)
It is a public installed header used by libweston.h. See "Rename compositor.h to libweston/libweston.h" for rationale. Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
528 lines
13 KiB
C
528 lines
13 KiB
C
/*
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* Copyright © 2011 Benjamin Franzke
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* Copyright © 2010 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#include "config.h"
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#include <stdint.h>
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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 <signal.h>
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#include <wayland-client.h>
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#include "shared/os-compatibility.h"
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#include <libweston/zalloc.h>
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#include "xdg-shell-client-protocol.h"
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#include "fullscreen-shell-unstable-v1-client-protocol.h"
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struct display {
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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 xdg_wm_base *wm_base;
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struct zwp_fullscreen_shell_v1 *fshell;
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struct wl_shm *shm;
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bool has_xrgb;
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};
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struct buffer {
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struct wl_buffer *buffer;
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void *shm_data;
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int busy;
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};
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struct window {
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struct display *display;
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int width, height;
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struct wl_surface *surface;
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struct xdg_surface *xdg_surface;
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struct xdg_toplevel *xdg_toplevel;
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struct buffer buffers[2];
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struct buffer *prev_buffer;
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struct wl_callback *callback;
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bool wait_for_configure;
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};
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static int running = 1;
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static void
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redraw(void *data, struct wl_callback *callback, uint32_t time);
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static void
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buffer_release(void *data, struct wl_buffer *buffer)
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{
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struct buffer *mybuf = data;
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mybuf->busy = 0;
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}
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static const struct wl_buffer_listener buffer_listener = {
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buffer_release
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};
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static int
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create_shm_buffer(struct display *display, struct buffer *buffer,
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int width, int height, uint32_t format)
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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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void *data;
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stride = width * 4;
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size = stride * 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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return -1;
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}
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data = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
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if (data == MAP_FAILED) {
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fprintf(stderr, "mmap failed: %m\n");
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close(fd);
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return -1;
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}
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pool = wl_shm_create_pool(display->shm, fd, size);
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buffer->buffer = wl_shm_pool_create_buffer(pool, 0,
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width, height,
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stride, format);
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wl_buffer_add_listener(buffer->buffer, &buffer_listener, buffer);
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wl_shm_pool_destroy(pool);
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close(fd);
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buffer->shm_data = data;
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return 0;
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}
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static void
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handle_xdg_surface_configure(void *data, struct xdg_surface *surface,
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uint32_t serial)
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{
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struct window *window = data;
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xdg_surface_ack_configure(surface, serial);
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if (window->wait_for_configure) {
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redraw(window, NULL, 0);
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window->wait_for_configure = false;
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}
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}
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static const struct xdg_surface_listener xdg_surface_listener = {
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handle_xdg_surface_configure,
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};
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static void
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handle_xdg_toplevel_configure(void *data, struct xdg_toplevel *xdg_toplevel,
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int32_t width, int32_t height,
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struct wl_array *state)
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{
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}
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static void
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handle_xdg_toplevel_close(void *data, struct xdg_toplevel *xdg_toplevel)
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{
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running = 0;
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}
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static const struct xdg_toplevel_listener xdg_toplevel_listener = {
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handle_xdg_toplevel_configure,
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handle_xdg_toplevel_close,
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};
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static struct window *
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create_window(struct display *display, int width, int height)
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{
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struct window *window;
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window = zalloc(sizeof *window);
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if (!window)
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return NULL;
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window->callback = NULL;
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window->display = display;
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window->width = width;
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window->height = height;
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window->surface = wl_compositor_create_surface(display->compositor);
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if (display->wm_base) {
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window->xdg_surface =
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xdg_wm_base_get_xdg_surface(display->wm_base,
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window->surface);
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assert(window->xdg_surface);
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xdg_surface_add_listener(window->xdg_surface,
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&xdg_surface_listener, window);
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window->xdg_toplevel =
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xdg_surface_get_toplevel(window->xdg_surface);
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assert(window->xdg_toplevel);
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xdg_toplevel_add_listener(window->xdg_toplevel,
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&xdg_toplevel_listener, window);
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xdg_toplevel_set_title(window->xdg_toplevel, "simple-shm");
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wl_surface_commit(window->surface);
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window->wait_for_configure = true;
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} else if (display->fshell) {
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zwp_fullscreen_shell_v1_present_surface(display->fshell,
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window->surface,
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ZWP_FULLSCREEN_SHELL_V1_PRESENT_METHOD_DEFAULT,
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NULL);
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} else {
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assert(0);
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}
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return window;
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}
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static void
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destroy_window(struct window *window)
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{
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if (window->callback)
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wl_callback_destroy(window->callback);
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if (window->buffers[0].buffer)
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wl_buffer_destroy(window->buffers[0].buffer);
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if (window->buffers[1].buffer)
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wl_buffer_destroy(window->buffers[1].buffer);
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if (window->xdg_toplevel)
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xdg_toplevel_destroy(window->xdg_toplevel);
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if (window->xdg_surface)
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xdg_surface_destroy(window->xdg_surface);
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wl_surface_destroy(window->surface);
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free(window);
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}
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static struct buffer *
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window_next_buffer(struct window *window)
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{
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struct buffer *buffer;
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int ret = 0;
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if (!window->buffers[0].busy)
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buffer = &window->buffers[0];
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else if (!window->buffers[1].busy)
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buffer = &window->buffers[1];
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else
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return NULL;
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if (!buffer->buffer) {
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ret = create_shm_buffer(window->display, buffer,
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window->width, window->height,
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WL_SHM_FORMAT_XRGB8888);
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if (ret < 0)
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return NULL;
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/* paint the padding */
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memset(buffer->shm_data, 0xff,
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window->width * window->height * 4);
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}
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return buffer;
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}
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static void
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paint_pixels(void *image, int padding, int width, int height, uint32_t time)
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{
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const int halfh = padding + (height - padding * 2) / 2;
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const int halfw = padding + (width - padding * 2) / 2;
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int ir, or;
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uint32_t *pixel = image;
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int y;
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/* squared radii thresholds */
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or = (halfw < halfh ? halfw : halfh) - 8;
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ir = or - 32;
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or *= or;
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ir *= ir;
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pixel += padding * width;
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for (y = padding; y < height - padding; y++) {
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int x;
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int y2 = (y - halfh) * (y - halfh);
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pixel += padding;
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for (x = padding; x < width - padding; x++) {
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uint32_t v;
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/* squared distance from center */
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int r2 = (x - halfw) * (x - halfw) + y2;
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if (r2 < ir)
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v = (r2 / 32 + time / 64) * 0x0080401;
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else if (r2 < or)
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v = (y + time / 32) * 0x0080401;
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else
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v = (x + time / 16) * 0x0080401;
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v &= 0x00ffffff;
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/* cross if compositor uses X from XRGB as alpha */
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if (abs(x - y) > 6 && abs(x + y - height) > 6)
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v |= 0xff000000;
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*pixel++ = v;
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}
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pixel += padding;
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}
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}
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static const struct wl_callback_listener frame_listener;
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static void
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redraw(void *data, struct wl_callback *callback, uint32_t time)
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{
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struct window *window = data;
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struct buffer *buffer;
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buffer = window_next_buffer(window);
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if (!buffer) {
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fprintf(stderr,
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!callback ? "Failed to create the first buffer.\n" :
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"Both buffers busy at redraw(). Server bug?\n");
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abort();
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}
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paint_pixels(buffer->shm_data, 20, window->width, window->height, time);
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wl_surface_attach(window->surface, buffer->buffer, 0, 0);
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wl_surface_damage(window->surface,
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20, 20, window->width - 40, window->height - 40);
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if (callback)
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wl_callback_destroy(callback);
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window->callback = wl_surface_frame(window->surface);
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wl_callback_add_listener(window->callback, &frame_listener, window);
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wl_surface_commit(window->surface);
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buffer->busy = 1;
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}
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static const struct wl_callback_listener frame_listener = {
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redraw
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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 display *d = data;
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if (format == WL_SHM_FORMAT_XRGB8888)
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d->has_xrgb = true;
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}
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struct wl_shm_listener shm_listener = {
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shm_format
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};
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static void
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xdg_wm_base_ping(void *data, struct xdg_wm_base *shell, uint32_t serial)
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{
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xdg_wm_base_pong(shell, serial);
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}
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static const struct xdg_wm_base_listener xdg_wm_base_listener = {
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xdg_wm_base_ping,
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};
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static void
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registry_handle_global(void *data, struct wl_registry *registry,
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uint32_t id, const char *interface, uint32_t version)
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{
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struct display *d = data;
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if (strcmp(interface, "wl_compositor") == 0) {
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d->compositor =
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wl_registry_bind(registry,
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id, &wl_compositor_interface, 1);
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} else if (strcmp(interface, "xdg_wm_base") == 0) {
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d->wm_base = wl_registry_bind(registry,
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id, &xdg_wm_base_interface, 1);
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xdg_wm_base_add_listener(d->wm_base, &xdg_wm_base_listener, d);
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} else if (strcmp(interface, "zwp_fullscreen_shell_v1") == 0) {
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d->fshell = wl_registry_bind(registry,
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id, &zwp_fullscreen_shell_v1_interface, 1);
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} else if (strcmp(interface, "wl_shm") == 0) {
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d->shm = wl_registry_bind(registry,
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id, &wl_shm_interface, 1);
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wl_shm_add_listener(d->shm, &shm_listener, d);
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}
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}
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static void
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registry_handle_global_remove(void *data, struct wl_registry *registry,
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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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registry_handle_global,
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registry_handle_global_remove
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};
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static struct display *
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create_display(void)
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{
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struct display *display;
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display = malloc(sizeof *display);
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if (display == NULL) {
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fprintf(stderr, "out of memory\n");
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exit(1);
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}
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display->display = wl_display_connect(NULL);
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assert(display->display);
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display->has_xrgb = false;
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display->registry = wl_display_get_registry(display->display);
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wl_registry_add_listener(display->registry,
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®istry_listener, display);
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wl_display_roundtrip(display->display);
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if (display->shm == NULL) {
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fprintf(stderr, "No wl_shm global\n");
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exit(1);
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}
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wl_display_roundtrip(display->display);
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/*
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* Why do we need two roundtrips here?
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*
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* wl_display_get_registry() sends a request to the server, to which
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* the server replies by emitting the wl_registry.global events.
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* The first wl_display_roundtrip() sends wl_display.sync. The server
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* first processes the wl_display.get_registry which includes sending
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* the global events, and then processes the sync. Therefore when the
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* sync (roundtrip) returns, we are guaranteed to have received and
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* processed all the global events.
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*
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* While we are inside the first wl_display_roundtrip(), incoming
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* events are dispatched, which causes registry_handle_global() to
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* be called for each global. One of these globals is wl_shm.
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* registry_handle_global() sends wl_registry.bind request for the
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* wl_shm global. However, wl_registry.bind request is sent after
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* the first wl_display.sync, so the reply to the sync comes before
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* the initial events of the wl_shm object.
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*
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* The initial events that get sent as a reply to binding to wl_shm
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* include wl_shm.format. These tell us which pixel formats are
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* supported, and we need them before we can create buffers. They
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* don't change at runtime, so we receive them as part of init.
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*
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* When the reply to the first sync comes, the server may or may not
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* have sent the initial wl_shm events. Therefore we need the second
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* wl_display_roundtrip() call here.
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*
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* The server processes the wl_registry.bind for wl_shm first, and
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* the second wl_display.sync next. During our second call to
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* wl_display_roundtrip() the initial wl_shm events are received and
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* processed. Finally, when the reply to the second wl_display.sync
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* arrives, it guarantees we have processed all wl_shm initial events.
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*
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* This sequence contains two examples on how wl_display_roundtrip()
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* can be used to guarantee, that all reply events to a request
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* have been received and processed. This is a general Wayland
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* technique.
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*/
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if (!display->has_xrgb) {
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fprintf(stderr, "WL_SHM_FORMAT_XRGB32 not available\n");
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exit(1);
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}
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return display;
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}
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static void
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destroy_display(struct display *display)
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{
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if (display->shm)
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wl_shm_destroy(display->shm);
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if (display->wm_base)
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xdg_wm_base_destroy(display->wm_base);
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if (display->fshell)
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zwp_fullscreen_shell_v1_release(display->fshell);
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if (display->compositor)
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wl_compositor_destroy(display->compositor);
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wl_registry_destroy(display->registry);
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wl_display_flush(display->display);
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wl_display_disconnect(display->display);
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free(display);
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}
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static void
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signal_int(int signum)
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{
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running = 0;
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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 sigaction sigint;
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struct display *display;
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struct window *window;
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int ret = 0;
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display = create_display();
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window = create_window(display, 250, 250);
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if (!window)
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return 1;
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sigint.sa_handler = signal_int;
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sigemptyset(&sigint.sa_mask);
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sigint.sa_flags = SA_RESETHAND;
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sigaction(SIGINT, &sigint, NULL);
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/* Initialise damage to full surface, so the padding gets painted */
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wl_surface_damage(window->surface, 0, 0,
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window->width, window->height);
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if (!window->wait_for_configure)
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redraw(window, NULL, 0);
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while (running && ret != -1)
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ret = wl_display_dispatch(display->display);
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fprintf(stderr, "simple-shm exiting\n");
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destroy_window(window);
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destroy_display(display);
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return 0;
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}
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