Add an image viewer client

Makefile.in

@@ -5,10 +5,11 @@ exec_prefix = @exec_prefix@
 udev_rules_dir = @sysconfdir@/udev/rules.d
 
 libs = libwayland-server.so libwayland.so
-clients = flower gears screenshot terminal
+egl_clients = gears
+cairo_clients = flower screenshot terminal image
 compositors = wayland-system-compositor
 
-all : $(libs) $(compositors) $(clients)
+all : $(libs) $(compositors) $(egl_clients) $(cairo_clients)
 
 libwayland-server.so :				\
 	wayland.o				\
@@ -41,11 +42,16 @@ flower : flower.o wayland-glib.o
 gears : gears.o window.o wayland-glib.o cairo-util.o
 screenshot : screenshot.o wayland-glib.o
 terminal : terminal.o window.o wayland-glib.o cairo-util.o
+image : image.o window.o wayland-glib.o cairo-util.o
 
 terminal : LDLIBS += -lutil
+image : CFLAGS += @GDK_PIXBUF_CFLAGS@
+image : LDLIBS += @GDK_PIXBUF_LIBS@
 
-$(clients) : CFLAGS += @CLIENT_CFLAGS@
+$(egl_clients) : CFLAGS += @EGL_CLIENT_CFLAGS@
-$(clients) : LDLIBS += -L. -lwayland @CLIENT_LIBS@ -lrt
+$(egl_clients) : LDLIBS += -L. -lwayland @EGL_CLIENT_LIBS@ -lrt
+$(cairo_clients) : CFLAGS += @CAIRO_CLIENT_CFLAGS@
+$(cairo_clients) : LDLIBS += -L. -lwayland @CAIRO_CLIENT_LIBS@ -lrt
 
 install : $(libs) $(compositors)
 	install -d @libdir@ @libdir@/pkgconfig ${udev_rules_dir}

configure.ac

@@ -6,7 +6,9 @@ PKG_CHECK_MODULES(FFI, [libffi])
 
 PKG_CHECK_MODULES(EGL_COMPOSITOR,
 		  [eagle libpng cairo gdk-pixbuf-2.0 libudev >= 136 libdrm])
-PKG_CHECK_MODULES(CLIENT, [eagle cairo glib-2.0 libudev])
+PKG_CHECK_MODULES(EGL_CLIENT, [eagle cairo glib-2.0 libudev])
+PKG_CHECK_MODULES(CAIRO_CLIENT, [cairo-drm glib-2.0])
+PKG_CHECK_MODULES(GDK_PIXBUF, [gdk-pixbuf-2.0])
 
 if test $CC = gcc; then
 	GCC_CFLAGS="-Wall -g -Wstrict-prototypes -Wmissing-prototypes -fvisibility=hidden"

image.c

@@ -0,0 +1,336 @@
+/*
+ * Copyright © 2008 Kristian Høgsberg
+ * Copyright © 2009 Chris Wilson
+ *
+ * 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 <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <math.h>
+#include <time.h>
+#include <cairo.h>
+#include <cairo-drm.h>
+#include <glib.h>
+#include <gdk-pixbuf/gdk-pixbuf.h>
+
+#include "wayland-client.h"
+#include "wayland-glib.h"
+
+#include "window.h"
+
+static const char gem_device[] = "/dev/dri/card0";
+static const char socket_name[] = "\0wayland";
+
+struct image {
+	struct window *window;
+	struct display *display;
+	struct wl_compositor *compositor;
+	uint32_t key;
+
+	gboolean redraw_scheduled;
+	gboolean redraw_pending;
+
+	cairo_surface_t *surface;
+	gchar *filename;
+};
+
+static void
+set_source_pixbuf(cairo_t         *cr,
+		  const GdkPixbuf *pixbuf,
+		  double           src_x,
+		  double           src_y,
+		  double           src_width,
+		  double           src_height)
+{
+	gint width = gdk_pixbuf_get_width (pixbuf);
+	gint height = gdk_pixbuf_get_height (pixbuf);
+	guchar *gdk_pixels = gdk_pixbuf_get_pixels (pixbuf);
+	int gdk_rowstride = gdk_pixbuf_get_rowstride (pixbuf);
+	int n_channels = gdk_pixbuf_get_n_channels (pixbuf);
+	int cairo_stride;
+	guchar *cairo_pixels;
+	cairo_format_t format;
+	cairo_surface_t *surface;
+	int j;
+
+	if (n_channels == 3)
+		format = CAIRO_FORMAT_RGB24;
+	else
+		format = CAIRO_FORMAT_ARGB32;
+
+	surface = cairo_image_surface_create(format, width, height);
+	if (cairo_surface_status(surface)) {
+		cairo_set_source_surface(cr, surface, 0, 0);
+		return;
+	}
+
+	cairo_stride = cairo_image_surface_get_stride(surface);
+	cairo_pixels = cairo_image_surface_get_data(surface);
+
+	for (j = height; j; j--) {
+		guchar *p = gdk_pixels;
+		guchar *q = cairo_pixels;
+
+		if (n_channels == 3) {
+			guchar *end = p + 3 * width;
+
+			while (p < end) {
+#if G_BYTE_ORDER == G_LITTLE_ENDIAN
+				q[0] = p[2];
+				q[1] = p[1];
+				q[2] = p[0];
+#else
+				q[1] = p[0];
+				q[2] = p[1];
+				q[3] = p[2];
+#endif
+				p += 3;
+				q += 4;
+			}
+		} else {
+			guchar *end = p + 4 * width;
+			guint t1,t2,t3;
+
+#define MULT(d,c,a,t) G_STMT_START { t = c * a + 0x7f; d = ((t >> 8) + t) >> 8; } G_STMT_END
+
+			while (p < end) {
+#if G_BYTE_ORDER == G_LITTLE_ENDIAN
+				MULT(q[0], p[2], p[3], t1);
+				MULT(q[1], p[1], p[3], t2);
+				MULT(q[2], p[0], p[3], t3);
+				q[3] = p[3];
+#else
+				q[0] = p[3];
+				MULT(q[1], p[0], p[3], t1);
+				MULT(q[2], p[1], p[3], t2);
+				MULT(q[3], p[2], p[3], t3);
+#endif
+
+				p += 4;
+				q += 4;
+			}
+#undef MULT
+		}
+
+		gdk_pixels += gdk_rowstride;
+		cairo_pixels += cairo_stride;
+	}
+	cairo_surface_mark_dirty(surface);
+
+	cairo_set_source_surface(cr, surface,
+				 src_x + .5 * (src_width - width),
+				 src_y + .5 * (src_height - height));
+	cairo_surface_destroy(surface);
+}
+
+static void
+image_draw(struct image *image)
+{
+	struct rectangle rectangle;
+	GdkPixbuf *pb;
+	cairo_t *cr;
+
+	image->redraw_pending = 0;
+
+	window_draw(image->window);
+
+	window_get_child_rectangle(image->window, &rectangle);
+
+	pb = gdk_pixbuf_new_from_file_at_size(image->filename,
+					      rectangle.width,
+					      rectangle.height,
+					      NULL);
+	if (pb == NULL)
+		return;
+
+	image->surface =
+		window_create_surface(image->window, &rectangle);
+
+	cr = cairo_create(image->surface);
+	cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
+	cairo_set_source_rgba(cr, 0, 0, 0, 1);
+	cairo_paint(cr);
+	set_source_pixbuf(cr, pb,
+			  0, 0,
+			  rectangle.width, rectangle.height);
+	cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
+	cairo_paint(cr);
+	cairo_destroy(cr);
+
+	g_object_unref(pb);
+
+	window_copy_surface(image->window,
+			    &rectangle,
+			    image->surface);
+
+	wl_compositor_commit(image->compositor, image->key);
+}
+
+static gboolean
+image_idle_redraw(void *data)
+{
+	struct image *image = data;
+
+	image_draw(image);
+
+	return FALSE;
+}
+
+static void
+image_schedule_redraw(struct image *image)
+{
+	if (!image->redraw_scheduled) {
+		image->redraw_scheduled = 1;
+		g_idle_add(image_idle_redraw, image);
+	} else {
+		image->redraw_pending = 1;
+	}
+}
+
+static void
+resize_handler(struct window *window, void *data)
+{
+	struct image *image = data;
+
+	image_schedule_redraw(image);
+}
+
+static void
+handle_acknowledge(void *data,
+		   struct wl_compositor *compositor,
+		   uint32_t key, uint32_t frame)
+{
+	struct image *image = data;
+
+	if (image->key != key)
+		return;
+
+	cairo_surface_destroy(image->surface);
+	image->redraw_scheduled = 0;
+	if (image->redraw_pending) {
+		image->redraw_pending = 0;
+		image_schedule_redraw(image);
+	}
+}
+
+static void
+handle_frame(void *data,
+	     struct wl_compositor *compositor,
+	     uint32_t frame, uint32_t timestamp)
+{
+}
+
+static const struct wl_compositor_listener compositor_listener = {
+	handle_acknowledge,
+	handle_frame,
+};
+
+static struct image *
+image_create(struct display *display, uint32_t key, const char *filename)
+{
+	struct image *image;
+	gchar *basename;
+	gchar *title;
+
+	image = malloc(sizeof *image);
+	if (image == NULL)
+		return image;
+	memset(image, 0, sizeof *image);
+
+	basename = g_path_get_basename(filename);
+	title = g_strdup_printf("Wayland Image - %s", basename);
+	g_free(basename);
+
+	image->filename = g_strdup(filename);
+
+	image->window = window_create(display, title, 100 * key, 100 * key, 500, 400);
+	image->display = display;
+
+	/* FIXME: Window uses key 1 for moves, need some kind of
+	 * allocation scheme here.  Or maybe just a real toolkit. */
+	image->key = key + 100;
+	image->redraw_scheduled = 1;
+
+	image->compositor = display_get_compositor(display);
+	window_set_resize_handler(image->window, resize_handler, image);
+
+	wl_compositor_add_listener(image->compositor, &compositor_listener, image);
+
+	image_draw(image);
+
+	return image;
+}
+
+static const GOptionEntry option_entries[] = {
+	{ NULL }
+};
+
+int
+main(int argc, char *argv[])
+{
+	struct wl_display *display;
+	int fd;
+	GMainLoop *loop;
+	GSource *source;
+	struct display *d;
+	GOptionContext *context;
+	GError *error;
+	int i;
+
+	context = g_option_context_new(NULL);
+	g_option_context_add_main_entries(context, option_entries, "Wayland Image");
+	if (!g_option_context_parse(context, &argc, &argv, &error)) {
+		fprintf(stderr, "option parsing failed: %s\n", error->message);
+		exit(EXIT_FAILURE);
+	}
+
+	fd = open(gem_device, O_RDWR);
+	if (fd < 0) {
+		fprintf(stderr, "drm open failed: %m\n");
+		return -1;
+	}
+
+	display = wl_display_create(socket_name, sizeof socket_name);
+	if (display == NULL) {
+		fprintf(stderr, "failed to create display: %m\n");
+		return -1;
+	}
+
+	d = display_create(display, fd);
+	loop = g_main_loop_new(NULL, FALSE);
+	source = wl_glib_source_new(display);
+	g_source_attach(source, NULL);
+
+	g_type_init ();
+
+	for (i = 1; i < argc; i++) {
+		struct image *image;
+
+		image = image_create (d, i, argv[i]);
+	}
+
+	g_main_loop_run(loop);
+
+	return 0;
+}