1 files changed, 55 insertions, 0 deletions
diff --git a/gfx/thebes/gfxFontMissingGlyphs.h b/gfx/thebes/gfxFontMissingGlyphs.h
new file mode 100644
index 000000000..1814a89a7
--- /dev/null
+++ b/gfx/thebes/gfxFontMissingGlyphs.h
@@ -0,0 +1,55 @@
+/* -*- 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 GFX_FONTMISSINGGLYPHS_H
+#define GFX_FONTMISSINGGLYPHS_H
+
+#include "mozilla/Attributes.h"
+#include "mozilla/gfx/Rect.h"
+
+namespace mozilla {
+namespace gfx {
+class DrawTarget;
+class Pattern;
+} // namespace gfx
+} // namespace mozilla
+
+/**
+ * This class should not be instantiated. It's just a container
+ * for some helper functions.
+ */
+class gfxFontMissingGlyphs final
+{
+    typedef mozilla::gfx::DrawTarget DrawTarget;
+    typedef mozilla::gfx::Float Float;
+    typedef mozilla::gfx::Pattern Pattern;
+    typedef mozilla::gfx::Rect Rect;
+
+    gfxFontMissingGlyphs() = delete; // prevent instantiation
+
+public:
+    /**
+     * Draw hexboxes for a missing glyph.
+     * @param aChar the UTF16 codepoint for the character
+     * @param aRect the glyph-box for the glyph that is missing
+     * @param aDrawTarget the DrawTarget to draw to
+     * @param aPattern the pattern currently being used to paint
+     * @param aAppUnitsPerDevPixel the appUnits to devPixel ratio we're using,
+     *                             (so we can scale glyphs to a sensible size)
+     */
+    static void DrawMissingGlyph(uint32_t aChar,
+                                 const Rect& aRect,
+                                 DrawTarget& aDrawTarget,
+                                 const Pattern& aPattern,
+                                 uint32_t aAppUnitsPerDevPixel);
+    /**
+     * @return the desired minimum width for a glyph-box that will allow
+     * the hexboxes to be drawn reasonably.
+     */
+    static Float GetDesiredMinWidth(uint32_t aChar,
+                                    uint32_t aAppUnitsPerDevUnit);
+};
+
+#endif