1 files changed, 91 insertions, 0 deletions
diff --git a/gfx/thebes/gfxMacFont.h b/gfx/thebes/gfxMacFont.h
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+++ b/gfx/thebes/gfxMacFont.h
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+/* -*- 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_MACFONT_H
+#define GFX_MACFONT_H
+
+#include "mozilla/MemoryReporting.h"
+#include "gfxFont.h"
+#include <ApplicationServices/ApplicationServices.h>
+
+#include "mozilla/gfx/UnscaledFontMac.h"
+
+class MacOSFontEntry;
+
+class gfxMacFont final : public gfxFont {
+ public:
+  gfxMacFont(const RefPtr<mozilla::gfx::UnscaledFontMac>& aUnscaledFont,
+             MacOSFontEntry* aFontEntry, const gfxFontStyle* aFontStyle);
+
+  CGFontRef GetCGFontRef() const { return mCGFont; }
+
+  /* override Measure to add padding for antialiasing */
+  RunMetrics Measure(const gfxTextRun* aTextRun, uint32_t aStart, uint32_t aEnd,
+                     BoundingBoxType aBoundingBoxType,
+                     DrawTarget* aDrawTargetForTightBoundingBox,
+                     Spacing* aSpacing,
+                     mozilla::gfx::ShapedTextFlags aOrientation) override;
+
+  // We need to provide hinted (non-linear) glyph widths if using a font
+  // with embedded color bitmaps (Apple Color Emoji), as Core Text renders
+  // the glyphs with non-linear scaling at small pixel sizes.
+  bool ProvidesGlyphWidths() const override {
+    return mVariationFont ||
+           mFontEntry->HasFontTable(TRUETYPE_TAG('s', 'b', 'i', 'x'));
+  }
+
+  int32_t GetGlyphWidth(uint16_t aGID) override;
+
+  bool GetGlyphBounds(uint16_t aGID, gfxRect* aBounds, bool aTight) override;
+
+  already_AddRefed<mozilla::gfx::ScaledFont> GetScaledFont(
+      const TextRunDrawParams& aRunParams) override;
+
+  bool ShouldRoundXOffset(cairo_t* aCairo) const override;
+
+  void AddSizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf,
+                              FontCacheSizes* aSizes) const override;
+  void AddSizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf,
+                              FontCacheSizes* aSizes) const override;
+
+  FontType GetType() const override { return FONT_TYPE_MAC; }
+
+  bool UseNativeColrFontSupport() const override;
+
+ protected:
+  ~gfxMacFont() override;
+
+  const Metrics& GetHorizontalMetrics() const override { return mMetrics; }
+
+  // override to prefer CoreText shaping with fonts that depend on AAT
+  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;
+
+  void InitMetrics();
+  void InitMetricsFromPlatform();
+
+  // Get width and glyph ID for a character; uses aConvFactor
+  // to convert font units as returned by CG to actual dimensions
+  gfxFloat GetCharWidth(CFDataRef aCmap, char16_t aUniChar, uint32_t* aGlyphID,
+                        gfxFloat aConvFactor);
+
+  // a strong reference to the CoreGraphics font
+  CGFontRef mCGFont;
+
+  // a Core Text font reference, created only if we're using CT to measure
+  // glyph widths; otherwise null.
+  CTFontRef mCTFont;
+
+  mozilla::UniquePtr<gfxFontShaper> mCoreTextShaper;
+
+  Metrics mMetrics;
+  nscolor mFontSmoothingBackgroundColor;
+
+  bool mVariationFont;  // true if font has OpenType variations
+};
+
+#endif /* GFX_MACFONT_H */