1 files changed, 9 insertions, 0 deletions
diff --git a/image/png.h b/image/png.h
index b7ac91a3d2..7ecf68e76d 100644
--- a/image/png.h
+++ b/image/png.h
@@ -37,6 +37,7 @@
 
 namespace Common {
 class SeekableReadStream;
+class WriteStream;
 }
 
 namespace Graphics {
@@ -62,6 +63,14 @@ private:
 	Graphics::Surface *_outputSurface;
 };
 
+/**
+ * Outputs a compressed PNG stream of the given input surface.
+ *
+ * @param bottomUp Flip the vertical axis so pixel data is drawn from the
+ * bottom up, instead of from the top down.
+ */
+bool writePNG(Common::WriteStream &out, const Graphics::Surface &input, const bool bottomUp = false);
+
 } // End of namespace Image
 
 #endif