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diff --git a/base/gxpaint.h b/base/gxpaint.h
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+/* Copyright (C) 2001-2019 Artifex Software, Inc.
+   All Rights Reserved.
+
+   This software is provided AS-IS with no warranty, either express or
+   implied.
+
+   This software is distributed under license and may not be copied,
+   modified or distributed except as expressly authorized under the terms
+   of the license contained in the file LICENSE in this distribution.
+
+   Refer to licensing information at http://www.artifex.com or contact
+   Artifex Software, Inc.,  1305 Grant Avenue - Suite 200, Novato,
+   CA 94945, U.S.A., +1(415)492-9861, for further information.
+*/
+
+
+/* Internal interface to fill/stroke */
+/* Requires gsropt.h, gxfixed.h, gxpath.h */
+
+#ifndef gxpaint_INCLUDED
+#  define gxpaint_INCLUDED
+
+#include "gxpath.h"
+#include "gxfixed.h"
+#include "gsdevice.h"
+#include "gsdcolor.h"
+
+/* ------ Graphics-state-aware procedures ------ */
+
+/*
+ * The following procedures use information from the graphics state.
+ * They are implemented in gxpaint.c.
+ */
+
+int gx_fill_path(gx_path * ppath, gx_device_color * pdevc, gs_gstate * pgs,
+                 int rule, fixed adjust_x, fixed adjust_y);
+int gx_stroke_fill(gx_path * ppath, gs_gstate * pgs);
+int gx_stroke_add(gx_path *ppath, gx_path *to_path, const gs_gstate * pgs, bool traditional);
+/*
+ * gx_gstate_stroke_add needs a device for the sake of absolute-length
+ * dots (and for no other reason).
+ */
+int gx_gstate_stroke_add(gx_path *ppath, gx_path *to_path,
+                         gx_device *dev, const gs_gstate *pgs);
+
+/* ------ Imager procedures ------ */
+
+/*
+ * Tweak the fill adjustment if necessary so that (nearly) empty
+ * rectangles are guaranteed to produce some output.
+ */
+void gx_adjust_if_empty(const gs_fixed_rect *, gs_fixed_point *);
+
+/*
+ * Compute the amount by which to expand a stroked bounding box to account
+ * for line width, caps and joins.  If the amount is too large to fit in a
+ * gs_fixed_point, return gs_error_limitcheck.  Return 0 if the result is
+ * exact, 1 if it is conservative.
+ *
+ * This procedure is fast, but the result may be conservative by a large
+ * amount if the miter limit is large.  If this matters, use strokepath +
+ * pathbbox.
+ */
+int gx_stroke_path_expansion(const gs_gstate *pgs,
+                             const gx_path *ppath, gs_fixed_point *ppt);
+
+/* Backward compatibility */
+#define gx_stroke_expansion(pgs, ppt)\
+  gx_stroke_path_expansion(pgs, (const gx_path *)0, ppt)
+
+/*
+ * The following procedures do not need a graphics state.
+ * These procedures are implemented in gxfill.c and gxstroke.c.
+ */
+
+/* Define the parameters passed to the imager's filling routine. */
+struct gx_fill_params_s {
+    int rule;			/* -1 = winding #, 1 = even/odd */
+    gs_fixed_point adjust;
+    float flatness;
+};
+
+#define gx_fill_path_only(ppath, dev, pgs, params, pdevc, pcpath)\
+  (*dev_proc(dev, fill_path))(dev, pgs, ppath, params, pdevc, pcpath)
+
+/* Define the parameters passed to the imager's stroke routine. */
+struct gx_stroke_params_s {
+    float flatness;
+    bool  traditional;
+};
+
+int gx_stroke_path_only(gx_path * ppath, gx_path * to_path, gx_device * dev,
+                        const gs_gstate * pgs,
+                        const gx_stroke_params * params,
+                        const gx_device_color * pdevc,
+                        const gx_clip_path * pcpath);
+
+#endif /* gxpaint_INCLUDED */