gecko-dev/gfx/thebes/gfxGDIFont.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_GDIFONT_H
#define GFX_GDIFONT_H
#include "mozilla/MemoryReporting.h"
#include "gfxFont.h"
#include "gfxGDIFontList.h"
#include "nsDataHashtable.h"
#include "nsHashKeys.h"
#include "cairo.h"
#include "usp10.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; }
virtual 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 uint32_t GetSpaceGlyph() MOZ_OVERRIDE;
virtual bool SetupCairoFont(gfxContext *aContext) MOZ_OVERRIDE;
/* override Measure to add padding for antialiasing */
virtual RunMetrics Measure(gfxTextRun *aTextRun,
uint32_t aStart, uint32_t aEnd,
BoundingBoxType aBoundingBoxType,
gfxContext *aContextForTightBoundingBox,
Spacing *aSpacing,
uint16_t aOrientation) MOZ_OVERRIDE;
/* required for MathML to suppress effects of ClearType "padding" */
virtual gfxFont*
CopyWithAntialiasOption(AntialiasOption anAAOption) MOZ_OVERRIDE;
// If the font has a cmap table, we handle it purely with harfbuzz;
// but if not (e.g. .fon fonts), we'll use a GDI callback to get glyphs.
virtual bool ProvidesGetGlyph() const MOZ_OVERRIDE {
return !mFontEntry->HasCmapTable();
}
virtual uint32_t GetGlyph(uint32_t aUnicode,
uint32_t aVarSelector) MOZ_OVERRIDE;
virtual bool ProvidesGlyphWidths() const MOZ_OVERRIDE { return true; }
// get hinted glyph width in pixels as 16.16 fixed-point value
virtual int32_t GetGlyphWidth(DrawTarget& aDrawTarget,
uint16_t aGID) MOZ_OVERRIDE;
virtual void AddSizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf,
FontCacheSizes* aSizes) const;
virtual void AddSizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf,
FontCacheSizes* aSizes) const;
virtual FontType GetType() const MOZ_OVERRIDE { return FONT_TYPE_GDI; }
protected:
virtual const Metrics& GetHorizontalMetrics() MOZ_OVERRIDE;
/* override to ensure the cairo font is set up properly */
virtual bool ShapeText(gfxContext *aContext,
const char16_t *aText,
uint32_t aOffset,
uint32_t aLength,
int32_t aScript,
bool aVertical,
gfxShapedText *aShapedText) MOZ_OVERRIDE;
void Initialize(); // creates metrics and Cairo fonts
// Fill the given LOGFONT record according to our style, but don't adjust
// the lfItalic field if we're going to use a cairo transform for fake
// italics.
void FillLogFont(LOGFONTW& aLogFont, gfxFloat aSize, bool aUseGDIFakeItalic);
HFONT mFont;
cairo_font_face_t *mFontFace;
Metrics *mMetrics;
uint32_t mSpaceGlyph;
bool mNeedsBold;
// cache of glyph IDs (used for non-sfnt fonts only)
nsAutoPtr<nsDataHashtable<nsUint32HashKey,uint32_t> > mGlyphIDs;
SCRIPT_CACHE mScriptCache;
// cache of glyph widths in 16.16 fixed-point pixels
nsAutoPtr<nsDataHashtable<nsUint32HashKey,int32_t> > mGlyphWidths;
};
#endif /* GFX_GDIFONT_H */