gecko-dev/gfx/thebes/gfxMacFont.h

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/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* 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 "cairo.h"
#include <ApplicationServices/ApplicationServices.h>
#include "mozilla/gfx/UnscaledFontMac.h"
class MacOSFontEntry;
class gfxMacFont : public gfxFont
{
public:
gfxMacFont(const RefPtr<mozilla::gfx::UnscaledFontMac>& aUnscaledFont,
MacOSFontEntry *aFontEntry, const gfxFontStyle *aFontStyle,
bool aNeedsBold);
virtual ~gfxMacFont();
CGFontRef GetCGFontRef() const { return mCGFont; }
/* overrides for the pure virtual methods in gfxFont */
uint32_t GetSpaceGlyph() override {
return mSpaceGlyph;
}
bool SetupCairoFont(DrawTarget* aDrawTarget) override;
/* 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(DrawTarget& aDrawTarget,
uint16_t aGID) override;
already_AddRefed<mozilla::gfx::ScaledFont>
GetScaledFont(mozilla::gfx::DrawTarget *aTarget) 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; }
// Helper to create a CTFont from a CGFont, with optional font descriptor
// (for features), and copying any variations that were set on the CGFont.
// This is public so that gfxCoreTextShaper can also use it.
static CTFontRef
CreateCTFontFromCGFontWithVariations(CGFontRef aCGFont,
CGFloat aSize,
CTFontDescriptorRef aFontDesc = nullptr);
protected:
const Metrics& GetHorizontalMetrics() 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,
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;
cairo_font_face_t *mFontFace;
mozilla::UniquePtr<gfxFontShaper> mCoreTextShaper;
Metrics mMetrics;
uint32_t mSpaceGlyph;
nscolor mFontSmoothingBackgroundColor;
bool mVariationFont; // true if font has OpenType variations
};
#endif /* GFX_MACFONT_H */