poppler and cairo test programm

benchmark.c

/*
 * Warning:
 * This thing is full of memory leaks
 *
 * filename: benchmark.c
 * compile with: LDFLAGS=$(pkg-config --libs --cflags gtk+-3.0 poppler-glib) make benchmark
 */

#include <gtk/gtk.h>
#include <poppler/glib/poppler.h>

GtkWidget *canvas = NULL;
guint max_pages = 0;
guint cur_page  = 0;
PopplerDocument *doc;
PopplerPage *page;

void slide_next();

gboolean keypress_callback(GtkWidget *widget, GdkEventKey *ev,
							 gpointer data) {
	if(ev->keyval == GDK_KEY_Escape) gtk_main_quit();

	slide_next();
}

gboolean draw_callback(GtkWidget *widget, cairo_t *cr, gpointer data) {
	guint width, height;
	gdouble popwidth, popheight, scale_factor;

	// this should certainly done only on resize
	width = gtk_widget_get_allocated_width (canvas);
	height = gtk_widget_get_allocated_height (canvas);
	poppler_page_get_size(page, &popwidth, &popheight);

	scale_factor = height/popheight;

	cairo_scale(cr, scale_factor, scale_factor);
	poppler_page_render(page, cr);
	return FALSE;
}

gboolean quit_callback(GtkWidget *widget, gpointer data) {
	gtk_main_quit();
}

void slide_next() {
	cur_page++;
	cur_page %= max_pages;
	page = poppler_document_get_page(doc, cur_page);

	// force redraw of whole canvas
	gtk_widget_queue_draw_area(canvas, 0, 0,
							   gtk_widget_get_allocated_width(canvas),
							   gtk_widget_get_allocated_height(canvas));
	printf("Showing page: %2d\n", cur_page);
	fflush(stdout);
}

int main(int argc, char **argv) {
	GtkWidget *window = NULL;
	gchar *uri = NULL;
	gdouble elapsed = 0;
	guint i;

	if(argc < 2) {
		fprintf(stderr, "specify a path!\n");
		return 42;
	}

	uri = g_strconcat("file://", argv[1], NULL);

	gtk_init(&argc, &argv);
	window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
	canvas = gtk_drawing_area_new();
	doc = poppler_document_new_from_file(uri, NULL, NULL);
	max_pages = poppler_document_get_n_pages(doc);

	gtk_container_add(GTK_CONTAINER(window), canvas);
	g_signal_connect(G_OBJECT(window), "key_press_event",
					 G_CALLBACK(keypress_callback), NULL);
	g_signal_connect(G_OBJECT(canvas), "destroy",
					 G_CALLBACK(quit_callback), NULL);
	g_signal_connect(G_OBJECT(canvas), "draw",
					 G_CALLBACK(draw_callback), NULL);

	// get initial page;
	page = poppler_document_get_page(doc, cur_page);
	gtk_widget_show_all(window);
	gtk_main();
}