README: Updated prerequisites.

diff --git a/README b/README
index 939b928b219add056b1a41e003a524581b8d545a..9959a4431706375ab20db089e0e99baa128450a7 100644 (file)
--- a/README
+++ b/README
@@ -17,6 +17,17 @@ Prerequisites
 
   * A POSIX + Single UNIX Specification compatible C library.
 
+  * libcairo:
+    The 2D vector graphics library is used for the actual drawing of the PDF
+    on screen.
+
+  * libgtk-2.0:
+    The cross-plattform GIMP Toolkit (GTK+) is used to create the graphical
+    user interface.
+
+  * libpoppler-glib:
+    The (GLib-based) PDF rendering library is used for handling the PDF files.
+
 Configuring / Compiling / Installing
 ------------------------------------