1 files changed, 74 insertions, 0 deletions
diff --git a/gfx/thebes/gfxGraphiteShaper.h b/gfx/thebes/gfxGraphiteShaper.h
new file mode 100644
index 0000000000..fc61ac10df
--- /dev/null
+++ b/gfx/thebes/gfxGraphiteShaper.h
@@ -0,0 +1,74 @@
+/* -*- 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_GRAPHITESHAPER_H
+#define GFX_GRAPHITESHAPER_H
+
+#include "gfxFont.h"
+
+#include "mozilla/gfx/2D.h"
+
+#include "ThebesRLBoxTypes.h"
+
+struct gr_face;
+struct gr_font;
+struct gr_segment;
+
+class gfxGraphiteShaper : public gfxFontShaper {
+ public:
+  explicit gfxGraphiteShaper(gfxFont* aFont);
+  virtual ~gfxGraphiteShaper();
+
+  bool ShapeText(DrawTarget* aDrawTarget, const char16_t* aText,
+                 uint32_t aOffset, uint32_t aLength, Script aScript,
+                 nsAtom* aLanguage, bool aVertical, RoundingFlags aRounding,
+                 gfxShapedText* aShapedText) override;
+
+  static void Shutdown();
+
+ protected:
+  nsresult SetGlyphsFromSegment(gfxShapedText* aShapedText, uint32_t aOffset,
+                                uint32_t aLength, const char16_t* aText,
+                                tainted_opaque_gr<char16_t*> t_aText,
+                                tainted_opaque_gr<gr_segment*> aSegment,
+                                RoundingFlags aRounding);
+
+  // Graphite is run in a rlbox sandbox. Callback GrGetAdvance must be
+  // explicitly permitted. Since the sandbox is owned in gfxFontEntry class,
+  // gfxFontEntry needs access to the protected callback.
+  friend class gfxFontEntry;
+  static tainted_opaque_gr<float> GrGetAdvance(
+      rlbox_sandbox_gr& sandbox, tainted_opaque_gr<const void*> appFontHandle,
+      tainted_opaque_gr<uint16_t> glyphid);
+
+  tainted_opaque_gr<gr_face*>
+      mGrFace;  // owned by the font entry; shaper must call
+                // gfxFontEntry::ReleaseGrFace when finished with it
+  tainted_opaque_gr<gr_font*> mGrFont;  // owned by the shaper itself
+
+  // All libGraphite functionality is sandboxed. This is the sandbox instance.
+  rlbox_sandbox_gr* mSandbox;
+
+  // Holds the handle to the permitted callback into Firefox for the sandboxed
+  // libGraphite
+  sandbox_callback_gr<float (*)(const void*, uint16_t)>* mCallback;
+
+  struct CallbackData {
+    // mFont is a pointer to the font that owns this shaper, so it will
+    // remain valid throughout our lifetime
+    gfxFont* MOZ_NON_OWNING_REF mFont;
+  };
+
+  CallbackData mCallbackData;
+  static thread_local CallbackData* tl_GrGetAdvanceData;
+
+  bool mFallbackToSmallCaps;  // special fallback for the petite-caps case
+
+  // Convert HTML 'lang' (BCP47) to Graphite language code
+  static uint32_t GetGraphiteTagForLang(const nsCString& aLang);
+  static nsTHashtable<nsUint32HashKey>* sLanguageTags;
+};
+
+#endif /* GFX_GRAPHITESHAPER_H */