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diff --git a/gfx/thebes/gfxXlibNativeRenderer.h b/gfx/thebes/gfxXlibNativeRenderer.h
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+/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef GFXXLIBNATIVERENDER_H_
+#define GFXXLIBNATIVERENDER_H_
+
+#include "nsPoint.h"
+#include "nsRect.h"
+#include "mozilla/gfx/Rect.h"
+#include "mozilla/gfx/Point.h"
+#include <X11/Xlib.h>
+
+namespace mozilla {
+namespace gfx {
+ class DrawTarget;
+}
+}
+
+class gfxASurface;
+class gfxContext;
+typedef struct _cairo cairo_t;
+typedef struct _cairo_surface cairo_surface_t;
+
+/**
+ * This class lets us take code that draws into an X drawable and lets us
+ * use it to draw into any Thebes context. The user should subclass this class,
+ * override DrawWithXib, and then call Draw(). The drawing will be subjected
+ * to all Thebes transformations, clipping etc.
+ */
+class gfxXlibNativeRenderer {
+public:
+ /**
+ * Perform the native drawing.
+ * @param surface the cairo_surface_t for drawing. Must be a cairo_xlib_surface_t.
+ * The extents of this surface do not necessarily cover the
+ * entire rectangle with size provided to Draw().
+ * @param offset draw at this offset into the given drawable
+ * @param clipRects an array of rectangles; clip to the union.
+ * Any rectangles provided will be contained by the
+ * rectangle with size provided to Draw and by the
+ * surface extents.
+ * @param numClipRects the number of rects in the array, or zero if
+ * no clipping is required.
+ */
+ virtual nsresult DrawWithXlib(cairo_surface_t* surface,
+ mozilla::gfx::IntPoint offset,
+ mozilla::gfx::IntRect* clipRects,
+ uint32_t numClipRects) = 0;
+
+ enum {
+ // If set, then Draw() is opaque, i.e., every pixel in the intersection
+ // of the clipRect and (offset.x,offset.y,bounds.width,bounds.height)
+ // will be set and there is no dependence on what the existing pixels
+ // in the drawable are set to.
+ DRAW_IS_OPAQUE = 0x01,
+ // If set, then numClipRects can be zero or one
+ DRAW_SUPPORTS_CLIP_RECT = 0x04,
+ // If set, then numClipRects can be any value. If neither this
+ // nor CLIP_RECT are set, then numClipRects will be zero
+ DRAW_SUPPORTS_CLIP_LIST = 0x08,
+ // If set, then the surface in the callback may have any visual;
+ // otherwise the pixels will have the same format as the visual
+ // passed to 'Draw'.
+ DRAW_SUPPORTS_ALTERNATE_VISUAL = 0x10,
+ // If set, then the Screen 'screen' in the callback can be different
+ // from the default Screen of the display passed to 'Draw' and can be
+ // on a different display.
+ DRAW_SUPPORTS_ALTERNATE_SCREEN = 0x20
+ };
+
+ /**
+ * @param flags see above
+ * @param size the size of the rectangle being drawn;
+ * the caller guarantees that drawing will not extend beyond the rectangle
+ * (0,0,size.width,size.height).
+ * @param screen a Screen to use for the drawing if ctx doesn't have one.
+ * @param visual a Visual to use for the drawing if ctx doesn't have one.
+ * @param result if non-null, we will try to capture a copy of the
+ * rendered image into a surface similar to the surface of ctx; if
+ * successful, a pointer to the new gfxASurface is stored in *resultSurface,
+ * otherwise *resultSurface is set to nullptr.
+ */
+ void Draw(gfxContext* ctx, mozilla::gfx::IntSize size,
+ uint32_t flags, Screen *screen, Visual *visual);
+
+private:
+ bool DrawDirect(mozilla::gfx::DrawTarget* aDT, mozilla::gfx::IntSize bounds,
+ uint32_t flags, Screen *screen, Visual *visual);
+
+ bool DrawCairo(cairo_t* cr, mozilla::gfx::IntSize size,
+ uint32_t flags, Screen *screen, Visual *visual);
+
+ void DrawFallback(mozilla::gfx::DrawTarget* dt, gfxContext* ctx,
+ gfxASurface* aSurface, mozilla::gfx::IntSize& size,
+ mozilla::gfx::IntRect& drawingRect, bool canDrawOverBackground,
+ uint32_t flags, Screen* screen, Visual* visual);
+
+ bool DrawOntoTempSurface(cairo_surface_t *tempXlibSurface,
+ mozilla::gfx::IntPoint offset);
+
+};
+
+#endif /*GFXXLIBNATIVERENDER_H_*/