1 files changed, 69 insertions, 0 deletions
diff --git a/gfx/thebes/gfxCoreTextShaper.h b/gfx/thebes/gfxCoreTextShaper.h
new file mode 100644
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+++ b/gfx/thebes/gfxCoreTextShaper.h
@@ -0,0 +1,69 @@
+/* -*- 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_CORETEXTSHAPER_H
+#define GFX_CORETEXTSHAPER_H
+
+#include "gfxFont.h"
+
+#include <ApplicationServices/ApplicationServices.h>
+
+class gfxMacFont;
+
+class gfxCoreTextShaper : public gfxFontShaper {
+ public:
+  explicit gfxCoreTextShaper(gfxMacFont* aFont);
+
+  virtual ~gfxCoreTextShaper();
+
+  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;
+
+  // clean up static objects that may have been cached
+  static void Shutdown();
+
+  // Flags used to track what AAT features should be enabled on the Core Text
+  // font instance. (Internal; only public so that we can use the
+  // MOZ_MAKE_ENUM_CLASS_BITWISE_OPERATORS macro below.)
+  enum FeatureFlags : uint8_t {
+    kDefaultFeatures = 0x00,
+    // bit flags for non-default feature settings we might need
+    // to use, which will require separate font instances
+    kDisableLigatures = 0x01,
+    kAddSmallCaps = 0x02,
+    kIndicFeatures = 0x04,
+
+    // number of font instances, indexed by OR-ing the flags above
+    kMaxFontInstances = 8
+  };
+
+ protected:
+  CTFontRef mCTFont[kMaxFontInstances];
+
+  // attributes for shaping text with LTR or RTL directionality
+  CFDictionaryRef mAttributesDictLTR;
+  CFDictionaryRef mAttributesDictRTL;
+
+  nsresult SetGlyphsFromRun(gfxShapedText* aShapedText, uint32_t aOffset, uint32_t aLength,
+                            CTRunRef aCTRun);
+
+  CTFontRef CreateCTFontWithFeatures(CGFloat aSize, CTFontDescriptorRef aDescriptor);
+
+  CFDictionaryRef CreateAttrDict(bool aRightToLeft);
+  CFDictionaryRef CreateAttrDictWithoutDirection();
+
+  static CTFontDescriptorRef CreateFontFeaturesDescriptor(
+      const std::pair<SInt16, SInt16>* aFeatures, size_t aCount);
+
+  static CTFontDescriptorRef GetFeaturesDescriptor(FeatureFlags aFeatureFlags);
+
+  // cached font descriptors, created the first time they're needed
+  static CTFontDescriptorRef sFeaturesDescriptor[kMaxFontInstances];
+};
+
+MOZ_MAKE_ENUM_CLASS_BITWISE_OPERATORS(gfxCoreTextShaper::FeatureFlags)
+
+#endif /* GFX_CORETEXTSHAPER_H */