diff --git a/graphics/tinygl/zblit.cpp b/graphics/tinygl/zblit.cpp
index a2db020e27a..8acf10de8d1 100644
--- a/graphics/tinygl/zblit.cpp
+++ b/graphics/tinygl/zblit.cpp
@@ -194,6 +194,11 @@ public:
 	Graphics::Surface _surface;
 };
 
+void tglGetBlitImageSize(BlitImage *blitImage, int &width, int &height) {
+	width = blitImage->_surface.w;
+	height = blitImage->_surface.h;
+}
+
 BlitImage *tglGenBlitImage() {
 	TinyGL::GLContext *c = TinyGL::gl_get_context();
 	BlitImage *image = new BlitImage();
diff --git a/graphics/tinygl/zblit.h b/graphics/tinygl/zblit.h
index c226b41dde1..61abdbfcf1b 100644
--- a/graphics/tinygl/zblit.h
+++ b/graphics/tinygl/zblit.h
@@ -78,6 +78,7 @@ struct BlitImage;
 BlitImage *tglGenBlitImage();
 void tglUploadBlitImage(BlitImage *blitImage, const Graphics::Surface &surface, uint32 colorKey, bool applyColorKey);
 void tglDeleteBlitImage(BlitImage *blitImage);
+void tglGetBlitImageSize(BlitImage *blitImage, int &width, int &height);
 
 void tglBlit(BlitImage *blitImage, const BlitTransform &transform);
 void tglBlit(BlitImage *blitImage, int x, int y);