Add a simple PDF viewer

Makefile.in

@@ -6,7 +6,7 @@ udev_rules_dir = @sysconfdir@/udev/rules.d
 
 libs = libwayland-server.so libwayland.so
 egl_clients = gears
-cairo_clients = flower screenshot terminal image
+cairo_clients = flower screenshot terminal image view
 compositors = wayland-system-compositor
 
 all : $(libs) $(compositors) $(egl_clients) $(cairo_clients)
@@ -43,10 +43,13 @@ 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
+view : view.o window.o wayland-glib.o cairo-util.o
 
 terminal : LDLIBS += -lutil
 image : CFLAGS += @GDK_PIXBUF_CFLAGS@
 image : LDLIBS += @GDK_PIXBUF_LIBS@
+view : CFLAGS += @POPPLER_CFLAGS@
+view : LDLIBS += @POPPLER_LIBS@
 
 $(egl_clients) : CFLAGS += @EGL_CLIENT_CFLAGS@
 $(egl_clients) : LDLIBS += -L. -lwayland @EGL_CLIENT_LIBS@ -lrt

configure.ac

@@ -9,6 +9,7 @@ PKG_CHECK_MODULES(EGL_COMPOSITOR,
 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])
+PKG_CHECK_MODULES(POPPLER, [poppler-glib gdk-2.0])
 
 if test $CC = gcc; then
 	GCC_CFLAGS="-Wall -g -Wstrict-prototypes -Wmissing-prototypes -fvisibility=hidden"

view.c

@@ -0,0 +1,313 @@
+/*
+ * 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 <linux/input.h>
+
+#include <glib/poppler-document.h>
+#include <glib/poppler-page.h>
+
+#include "wayland-util.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 view {
+	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;
+	PopplerDocument *document;
+	int page;
+	int fullscreen;
+	int focused;
+};
+
+static void
+view_draw(struct view *view)
+{
+	struct rectangle rectangle;
+	cairo_t *cr;
+	PopplerPage *page;
+	double width, height, doc_aspect, window_aspect, scale;
+
+	view->redraw_pending = 0;
+
+	window_draw(view->window);
+
+	window_get_child_rectangle(view->window, &rectangle);
+
+	page = poppler_document_get_page(view->document, view->page);
+
+	view->surface =
+		window_create_surface(view->window, &rectangle);
+
+	cr = cairo_create(view->surface);
+	cairo_set_source_rgba(cr, 0, 0, 0, 0.8); 
+	cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
+	cairo_paint(cr);
+	poppler_page_get_size(page, &width, &height);
+	doc_aspect = width / height;
+	window_aspect = (double) rectangle.width / rectangle.height;
+	if (doc_aspect < window_aspect)
+		scale = rectangle.height / height;
+	else
+		scale = rectangle.width / width;
+	cairo_scale(cr, scale, scale);
+	cairo_translate(cr,
+			(rectangle.width - width * scale) / 2 / scale,
+			(rectangle.height - height * scale) / 2 / scale);
+	cairo_rectangle(cr, 0, 0, width, height);
+	cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
+	cairo_set_source_rgb(cr, 1, 1, 1);
+	cairo_fill(cr);
+	poppler_page_render(page, cr);
+	cairo_destroy(cr);
+	g_object_unref(G_OBJECT(page));
+
+	window_copy_surface(view->window,
+			    &rectangle,
+			    view->surface);
+
+	wl_compositor_commit(view->compositor, view->key);
+}
+
+static gboolean
+view_idle_redraw(void *data)
+{
+	struct view *view = data;
+
+	view_draw(view);
+
+	return FALSE;
+}
+
+static void
+view_schedule_redraw(struct view *view)
+{
+	if (!view->redraw_scheduled) {
+		view->redraw_scheduled = 1;
+		g_idle_add(view_idle_redraw, view);
+	} else {
+		view->redraw_pending = 1;
+	}
+}
+
+static void
+key_handler(struct window *window, uint32_t key, uint32_t unicode,
+	    uint32_t state, uint32_t modifiers, void *data)
+{
+	struct view *view = data;
+
+	switch (key) {
+	case KEY_F11:
+		if (!state)
+			break;
+		view->fullscreen ^= 1;
+		window_set_fullscreen(window, view->fullscreen);
+		view_schedule_redraw(view);
+		break;
+	case KEY_SPACE:
+	case KEY_PAGEDOWN:
+		if (!state)
+			break;
+		view->page++;
+		view_schedule_redraw(view);
+		break;
+	case KEY_BACKSPACE:
+	case KEY_PAGEUP:
+		if (!state)
+			break;
+		view->page--;
+		view_schedule_redraw(view);
+		break;
+	default:
+		break;
+	}
+}
+
+static void
+resize_handler(struct window *window, void *data)
+{
+	struct view *view = data;
+
+	view_schedule_redraw(view);
+}
+
+static void
+handle_acknowledge(void *data,
+		   struct wl_compositor *compositor,
+		   uint32_t key, uint32_t frame)
+{
+	struct view *view = data;
+
+	if (view->key != key)
+		return;
+
+	cairo_surface_destroy(view->surface);
+	view->redraw_scheduled = 0;
+	if (view->redraw_pending) {
+		view->redraw_pending = 0;
+		view_schedule_redraw(view);
+	}
+}
+
+static void
+keyboard_focus_handler(struct window *window,
+		       struct wl_input_device *device, void *data)
+{
+	struct view *view = data;
+
+	view->focused = (device != NULL);
+	view_schedule_redraw(view);
+}
+
+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 view *
+view_create(struct display *display, uint32_t key, const char *filename)
+{
+	struct view *view;
+	gchar *basename;
+	gchar *title;
+	GError *error = NULL;
+
+	view = malloc(sizeof *view);
+	if (view == NULL)
+		return view;
+	memset(view, 0, sizeof *view);
+
+	basename = g_path_get_basename(filename);
+	title = g_strdup_printf("Wayland View - %s", basename);
+	g_free(basename);
+
+	view->filename = g_strdup(filename);
+
+	view->window = window_create(display, title,
+				     100 * key, 100 * key, 500, 400);
+	view->display = display;
+
+	/* FIXME: Window uses key 1 for moves, need some kind of
+	 * allocation scheme here.  Or maybe just a real toolkit. */
+	view->key = key + 100;
+	view->redraw_scheduled = 1;
+
+	view->compositor = display_get_compositor(display);
+	window_set_resize_handler(view->window, resize_handler, view);
+	window_set_key_handler(view->window, key_handler, view);
+	window_set_keyboard_focus_handler(view->window,
+					  keyboard_focus_handler, view);
+
+	wl_compositor_add_listener(view->compositor,
+				   &compositor_listener, view);
+
+	view->document = poppler_document_new_from_file(view->filename,
+							NULL, &error);
+	view->page = 0;
+	view_draw(view);
+
+	return view;
+}
+
+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 = NULL;
+	int i;
+
+	context = g_option_context_new(NULL);
+	g_option_context_add_main_entries(context, option_entries, "Wayland View");
+	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 view *view;
+
+		view = view_create (d, i, argv[i]);
+	}
+
+	g_main_loop_run(loop);
+
+	return 0;
+}