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349 lines
8.2 KiB
349 lines
8.2 KiB
/*
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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 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 <signal.h>
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#include <wayland-client.h>
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#include "../shared/os-compatibility.h"
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struct display {
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struct wl_display *display;
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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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uint32_t formats;
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uint32_t mask;
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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 wl_shell_surface *shell_surface;
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struct wl_buffer *buffer;
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void *shm_data;
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struct wl_callback *callback;
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};
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static struct wl_buffer *
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create_shm_buffer(struct display *display,
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int width, int height, uint32_t format, void **data_out)
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{
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struct wl_shm_pool *pool;
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struct wl_buffer *buffer;
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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 NULL;
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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 NULL;
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}
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pool = wl_shm_create_pool(display->shm, fd, size);
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buffer = wl_shm_pool_create_buffer(pool, 0,
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width, height, stride, format);
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wl_shm_pool_destroy(pool);
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close(fd);
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*data_out = data;
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return buffer;
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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 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 = malloc(sizeof *window);
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window->buffer = create_shm_buffer(display,
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width, height,
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WL_SHM_FORMAT_XRGB8888,
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&window->shm_data);
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if (!window->buffer) {
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free(window);
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return NULL;
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}
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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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window->shell_surface = wl_shell_get_shell_surface(display->shell,
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window->surface);
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if (window->shell_surface)
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wl_shell_surface_add_listener(window->shell_surface,
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&shell_surface_listener, window);
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wl_shell_surface_set_toplevel(window->shell_surface);
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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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wl_buffer_destroy(window->buffer);
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wl_shell_surface_destroy(window->shell_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 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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paint_pixels(window->shm_data, 20, window->width, window->height, time);
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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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}
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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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d->formats |= (1 << format);
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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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display_handle_global(struct wl_display *display, uint32_t id,
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const char *interface, uint32_t version, void *data)
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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_display_bind(display, id, &wl_compositor_interface);
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} else if (strcmp(interface, "wl_shell") == 0) {
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d->shell = wl_display_bind(display, id, &wl_shell_interface);
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} else if (strcmp(interface, "wl_shm") == 0) {
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d->shm = wl_display_bind(display, id, &wl_shm_interface);
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wl_shm_add_listener(d->shm, &shm_listenter, d);
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}
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}
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static int
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event_mask_update(uint32_t mask, void *data)
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{
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struct display *d = data;
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d->mask = mask;
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return 0;
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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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display->display = wl_display_connect(NULL);
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assert(display->display);
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display->formats = 0;
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wl_display_add_global_listener(display->display,
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display_handle_global, display);
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wl_display_iterate(display->display, WL_DISPLAY_READABLE);
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wl_display_roundtrip(display->display);
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if (!(display->formats & (1 << WL_SHM_FORMAT_XRGB8888))) {
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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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wl_display_get_fd(display->display, event_mask_update, display);
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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->shell)
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wl_shell_destroy(display->shell);
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if (display->compositor)
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wl_compositor_destroy(display->compositor);
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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 int running = 1;
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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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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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memset(window->shm_data, 0xff, window->width * window->height * 4);
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wl_surface_attach(window->surface, window->buffer, 0, 0);
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redraw(window, NULL, 0);
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while (running)
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wl_display_iterate(display->display, display->mask);
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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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