gecko/gfx/thebes/gfxMacFont.h

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/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
2012-05-21 04:12:37 -07:00
* 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 "gfxFont.h"
#include "gfxMacPlatformFontList.h"
#include "mozilla/gfx/2D.h"
#include "cairo.h"
class gfxMacFont : public gfxFont
{
public:
gfxMacFont(MacOSFontEntry *aFontEntry, const gfxFontStyle *aFontStyle,
bool aNeedsBold);
virtual ~gfxMacFont();
CGFontRef GetCGFontRef() const { return mCGFont; }
/* overrides for the pure virtual methods in gfxFont */
virtual const gfxFont::Metrics& GetMetrics() {
return mMetrics;
}
virtual uint32_t GetSpaceGlyph() {
return mSpaceGlyph;
}
virtual bool SetupCairoFont(gfxContext *aContext);
/* override Measure to add padding for antialiasing */
virtual RunMetrics Measure(gfxTextRun *aTextRun,
uint32_t aStart, uint32_t aEnd,
BoundingBoxType aBoundingBoxType,
gfxContext *aContextForTightBoundingBox,
Spacing *aSpacing);
// override gfxFont table access function to bypass gfxFontEntry cache,
// use CGFontRef API to get direct access to system font data
virtual hb_blob_t *GetFontTable(uint32_t aTag);
virtual mozilla::TemporaryRef<mozilla::gfx::ScaledFont> GetScaledFont(mozilla::gfx::DrawTarget *aTarget);
virtual void SizeOfExcludingThis(nsMallocSizeOfFun aMallocSizeOf,
FontCacheSizes* aSizes) const;
virtual void SizeOfIncludingThis(nsMallocSizeOfFun aMallocSizeOf,
FontCacheSizes* aSizes) const;
virtual FontType GetType() const { return FONT_TYPE_MAC; }
protected:
virtual void CreatePlatformShaper();
// override to prefer CoreText shaping with fonts that depend on AAT
virtual bool ShapeText(gfxContext *aContext,
const PRUnichar *aText,
uint32_t aOffset,
uint32_t aLength,
int32_t aScript,
gfxShapedText *aShapedText,
bool aPreferPlatformShaping = false);
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, PRUnichar aUniChar,
uint32_t *aGlyphID, gfxFloat aConvFactor);
static void DestroyBlobFunc(void* aUserData);
// a weak reference to the CoreGraphics font: this is owned by the
// MacOSFontEntry, it is not retained or released by gfxMacFont
CGFontRef mCGFont;
cairo_font_face_t *mFontFace;
Metrics mMetrics;
uint32_t mSpaceGlyph;
};
#endif /* GFX_MACFONT_H */