gecko/gfx/thebes/gfxGDIFont.h
2012-05-21 12:12:37 +01:00

93 lines
3.1 KiB
C++

/* -*- 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_GDIFONT_H
#define GFX_GDIFONT_H
#include "gfxFont.h"
#include "gfxGDIFontList.h"
#include "nsDataHashtable.h"
#include "nsHashKeys.h"
#include "cairo.h"
class gfxGDIFont : public gfxFont
{
public:
gfxGDIFont(GDIFontEntry *aFontEntry,
const gfxFontStyle *aFontStyle,
bool aNeedsBold,
AntialiasOption anAAOption = kAntialiasDefault);
virtual ~gfxGDIFont();
HFONT GetHFONT() { if (!mMetrics) Initialize(); return mFont; }
gfxFloat GetAdjustedSize() { if (!mMetrics) Initialize(); return mAdjustedSize; }
cairo_font_face_t *CairoFontFace() { return mFontFace; }
cairo_scaled_font_t *CairoScaledFont() { return mScaledFont; }
/* overrides for the pure virtual methods in gfxFont */
virtual const gfxFont::Metrics& GetMetrics();
virtual PRUint32 GetSpaceGlyph();
virtual bool SetupCairoFont(gfxContext *aContext);
/* override Measure to add padding for antialiasing */
virtual RunMetrics Measure(gfxTextRun *aTextRun,
PRUint32 aStart, PRUint32 aEnd,
BoundingBoxType aBoundingBoxType,
gfxContext *aContextForTightBoundingBox,
Spacing *aSpacing);
/* required for MathML to suppress effects of ClearType "padding" */
virtual gfxFont* CopyWithAntialiasOption(AntialiasOption anAAOption);
virtual bool ProvidesGlyphWidths() { return true; }
// get hinted glyph width in pixels as 16.16 fixed-point value
virtual PRInt32 GetGlyphWidth(gfxContext *aCtx, PRUint16 aGID);
virtual void SizeOfExcludingThis(nsMallocSizeOfFun aMallocSizeOf,
FontCacheSizes* aSizes) const;
virtual void SizeOfIncludingThis(nsMallocSizeOfFun aMallocSizeOf,
FontCacheSizes* aSizes) const;
virtual FontType GetType() const { return FONT_TYPE_GDI; }
protected:
virtual void CreatePlatformShaper();
/* override to check for uniscribe failure and fall back to GDI */
virtual bool ShapeWord(gfxContext *aContext,
gfxShapedWord *aShapedWord,
const PRUnichar *aString,
bool aPreferPlatformShaping = false);
void Initialize(); // creates metrics and Cairo fonts
void FillLogFont(LOGFONTW& aLogFont, gfxFloat aSize);
// mPlatformShaper is used for the GDI shaper, mUniscribeShaper
// for the Uniscribe version if needed
nsAutoPtr<gfxFontShaper> mUniscribeShaper;
HFONT mFont;
cairo_font_face_t *mFontFace;
Metrics *mMetrics;
PRUint32 mSpaceGlyph;
bool mNeedsBold;
// cache of glyph widths in 16.16 fixed-point pixels
nsDataHashtable<nsUint32HashKey,PRInt32> mGlyphWidths;
};
#endif /* GFX_GDIFONT_H */