clients: Add a simple shared memory client

clients/Makefile.am

@@ -9,6 +9,7 @@ noinst_PROGRAMS =				\
 	smoke					\
 	resizor					\
 	simple-client				\
+	simple-shm				\
 	eventdemo
 
 noinst_LIBRARIES = libtoytoolkit.a
@@ -57,6 +58,9 @@ resizor_LDADD = $(toolkit_libs)
 simple_client_SOURCES = simple-client.c
 simple_client_LDADD = $(SIMPLE_CLIENT_LIBS) -lm
 
+simple_shm_SOURCES = simple-shm.c
+simple_shm_LDADD = $(CLIENT_LIBS) -lrt -lm
+
 eventdemo_SOURCES = eventdemo.c
 eventdemo_LDADD = $(toolkit_libs)
 

clients/simple-shm.c

@@ -0,0 +1,230 @@
+/*
+ * 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 <math.h>
+#include <assert.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/mman.h>
+
+#include <wayland-client.h>
+#include <wayland-egl.h>
+
+struct display {
+	struct wl_display *display;
+	struct wl_visual *xrgb_visual;
+	struct wl_compositor *compositor;
+	struct wl_shell *shell;
+	struct wl_shm *shm;
+	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, struct wl_visual *visual,
+		  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, visual);
+
+	close(fd);
+
+	*data_out = data;
+
+	return buffer;
+}
+
+static struct window *
+create_window(struct display *display, int width, int height)
+{
+	struct window *window;
+	struct wl_visual *visual;
+	
+	window = malloc(sizeof *window);
+	window->display = display;
+	window->width = width;
+	window->height = height;
+	window->surface = wl_compositor_create_surface(display->compositor);
+	visual = display->xrgb_visual;
+	window->buffer = create_shm_buffer(display,
+					   width, height,
+					   visual, &window->data);
+
+	wl_shell_set_toplevel(display->shell, window->surface);
+
+	return window;
+}
+
+static void
+redraw(struct wl_surface *surface, void *data, 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);
+
+	wl_display_frame_callback(window->display->display,
+				  window->surface,
+				  redraw, window);
+}
+
+static void
+compositor_handle_visual(void *data,
+			 struct wl_compositor *compositor,
+			 uint32_t id, uint32_t token)
+{
+	struct display *d = data;
+
+	switch (token) {
+	case WL_COMPOSITOR_VISUAL_XRGB32:
+		d->xrgb_visual = wl_visual_create(d->display, id, 1);
+		break;
+	}
+}
+
+static const struct wl_compositor_listener compositor_listener = {
+	compositor_handle_visual,
+};
+
+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_compositor_create(display, id, 1);
+		wl_compositor_add_listener(d->compositor,
+					   &compositor_listener, d);
+	} else if (strcmp(interface, "wl_shell") == 0) {
+		d->shell = wl_shell_create(display, id, 1);
+	} else if (strcmp(interface, "wl_shm") == 0) {
+		d->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;
+}
+
+static void
+sync_callback(void *data)
+{
+	int *done = data;
+
+	*done = 1;
+}
+
+static struct display *
+create_display(void)
+{
+	struct display *display;
+	int done;
+
+	display = malloc(sizeof *display);
+	display->display = wl_display_connect(NULL);
+
+	wl_display_add_global_listener(display->display,
+				       display_handle_global, display);
+	wl_display_iterate(display->display, WL_DISPLAY_READABLE);
+
+	wl_display_get_fd(display->display, event_mask_update, display);
+	
+	wl_display_sync_callback(display->display, sync_callback, &done);
+	while (!display->xrgb_visual)
+		wl_display_iterate(display->display, display->mask);
+
+	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->surface, window, 0);
+
+	while (true)
+		wl_display_iterate(display->display, display->mask);
+
+	return 0;
+}