1 /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
2 * This Source Code Form is subject to the terms of the Mozilla Public
3 * License, v. 2.0. If a copy of the MPL was not distributed with this
4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
9 #include "mozilla/MemoryReporting.h"
11 #include <CoreText/CoreText.h>
13 #include "mozilla/gfx/UnscaledFontMac.h"
17 class gfxMacFont final
: public gfxFont
{
19 gfxMacFont(const RefPtr
<mozilla::gfx::UnscaledFontMac
>& aUnscaledFont
,
20 CTFontEntry
* aFontEntry
, const gfxFontStyle
* aFontStyle
);
22 CGFontRef
GetCGFontRef() const { return mCGFont
; }
24 /* override Measure to add padding for antialiasing */
25 RunMetrics
Measure(const gfxTextRun
* aTextRun
, uint32_t aStart
, uint32_t aEnd
,
26 BoundingBoxType aBoundingBoxType
,
27 DrawTarget
* aDrawTargetForTightBoundingBox
,
29 mozilla::gfx::ShapedTextFlags aOrientation
) override
;
31 // We need to provide hinted (non-linear) glyph widths if using a font
32 // with embedded color bitmaps (Apple Color Emoji), as Core Text renders
33 // the glyphs with non-linear scaling at small pixel sizes.
34 bool ProvidesGlyphWidths() const override
{
35 return mVariationFont
||
36 mFontEntry
->HasFontTable(TRUETYPE_TAG('s', 'b', 'i', 'x'));
39 int32_t GetGlyphWidth(uint16_t aGID
) override
;
41 bool GetGlyphBounds(uint16_t aGID
, gfxRect
* aBounds
, bool aTight
) override
;
43 already_AddRefed
<mozilla::gfx::ScaledFont
> GetScaledFont(
44 const TextRunDrawParams
& aRunParams
) override
;
46 bool ShouldRoundXOffset(cairo_t
* aCairo
) const override
;
48 void AddSizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf
,
49 FontCacheSizes
* aSizes
) const override
;
50 void AddSizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf
,
51 FontCacheSizes
* aSizes
) const override
;
53 FontType
GetType() const override
{ return FONT_TYPE_MAC
; }
55 bool UseNativeColrFontSupport() const override
;
58 ~gfxMacFont() override
;
60 const Metrics
& GetHorizontalMetrics() const override
{ return mMetrics
; }
62 // override to prefer CoreText shaping with fonts that depend on AAT
63 bool ShapeText(DrawTarget
* aDrawTarget
, const char16_t
* aText
,
64 uint32_t aOffset
, uint32_t aLength
, Script aScript
,
65 nsAtom
* aLanguage
, bool aVertical
, RoundingFlags aRounding
,
66 gfxShapedText
* aShapedText
) override
;
69 void InitMetricsFromPlatform();
71 // Get width and glyph ID for a character; uses aConvFactor
72 // to convert font units as returned by CG to actual dimensions
73 gfxFloat
GetCharWidth(CFDataRef aCmap
, char16_t aUniChar
, uint32_t* aGlyphID
,
74 gfxFloat aConvFactor
);
76 // a strong reference to the CoreGraphics font
79 // a Core Text font reference, created only if we're using CT to measure
80 // glyph widths; otherwise null.
83 mozilla::UniquePtr
<gfxFontShaper
> mCoreTextShaper
;
87 bool mVariationFont
; // true if font has OpenType variations
90 #endif /* GFX_MACFONT_H */