1 files changed, 77 insertions, 0 deletions
diff --git a/gfx/thebes/gfxGdkNativeRenderer.h b/gfx/thebes/gfxGdkNativeRenderer.h
new file mode 100644
index 0000000000..e11a3ba5d1
--- /dev/null
+++ b/gfx/thebes/gfxGdkNativeRenderer.h
@@ -0,0 +1,77 @@
+/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * 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 GFXGDKNATIVERENDER_H_
+#define GFXGDKNATIVERENDER_H_
+
+#include <gdk/gdk.h>
+#include "nsSize.h"
+#ifdef MOZ_X11
+#  include "gfxXlibNativeRenderer.h"
+#endif
+
+class gfxContext;
+
+/**
+ * This class lets us take code that draws into an GDK drawable and lets us
+ * use it to draw into any Thebes context. The user should subclass this class,
+ * override DrawWithGDK, and then call Draw(). The drawing will be subjected
+ * to all Thebes transformations, clipping etc.
+ */
+class gfxGdkNativeRenderer
+#ifdef MOZ_X11
+    : private gfxXlibNativeRenderer
+#endif
+{
+ public:
+  /**
+   * Perform the native drawing.
+   * @param offsetX draw at this offset into the given drawable
+   * @param offsetY draw at this offset into the given drawable
+   * @param clipRects an array of rects; clip to the union
+   * @param numClipRects the number of rects in the array, or zero if
+   * no clipping is required
+   */
+
+  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 =
+#ifdef MOZ_X11
+        gfxXlibNativeRenderer::DRAW_IS_OPAQUE
+#else
+        0x1
+#endif
+    // If set, then numClipRects can be zero or one.
+    // If not set, then numClipRects will be zero.
+    ,
+    DRAW_SUPPORTS_CLIP_RECT =
+#ifdef MOZ_X11
+        gfxXlibNativeRenderer::DRAW_SUPPORTS_CLIP_RECT
+#else
+        0x2
+#endif
+  };
+
+  /**
+   * @param flags see above
+   * @param bounds Draw()'s drawing is guaranteed to be restricted to
+   * the rectangle (offset.x,offset.y,bounds.width,bounds.height)
+   * @param dpy a display to use for the drawing if ctx doesn't have one
+   */
+
+ private:
+#ifdef MOZ_X11
+  // for gfxXlibNativeRenderer:
+  virtual nsresult DrawWithXlib(cairo_surface_t* surface, nsIntPoint offset,
+                                mozilla::gfx::IntRect* clipRects,
+                                uint32_t numClipRects) override;
+
+#endif
+};
+
+#endif /*GFXGDKNATIVERENDER_H_*/