1 files changed, 59 insertions, 0 deletions
diff --git a/gfx/thebes/gfxFontMissingGlyphs.h b/gfx/thebes/gfxFontMissingGlyphs.h
new file mode 100644
index 0000000000..b51740ecf4
--- /dev/null
+++ b/gfx/thebes/gfxFontMissingGlyphs.h
@@ -0,0 +1,59 @@
+/* -*- 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 GFX_FONTMISSINGGLYPHS_H
+#define GFX_FONTMISSINGGLYPHS_H
+
+#include "mozilla/Attributes.h"
+#include "mozilla/gfx/MatrixFwd.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::Matrix Matrix;
+  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)
+   * @param aMat optional local-space orientation matrix
+   */
+  static void DrawMissingGlyph(uint32_t aChar, const Rect& aRect,
+                               DrawTarget& aDrawTarget, const Pattern& aPattern,
+                               uint32_t aAppUnitsPerDevPixel,
+                               const Matrix* aMat = nullptr);
+  /**
+   * @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);
+
+  static void Purge();
+
+  static void Shutdown();
+};
+
+#endif