Source code

Revision control

Copy as Markdown

Other Tools

/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* 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 */
#include "mozilla/MemoryReporting.h"
#include "gfxFont.h"
#include "gfxGDIFontList.h"
#include "nsTHashMap.h"
#include "nsHashKeys.h"
#include "usp10.h"
class gfxGDIFont final : public gfxFont {
gfxGDIFont(GDIFontEntry* aFontEntry, const gfxFontStyle* aFontStyle,
AntialiasOption anAAOption = kAntialiasDefault);
HFONT GetHFONT() const { return mFont; }
already_AddRefed<mozilla::gfx::ScaledFont> GetScaledFont(
const TextRunDrawParams& aRunParams) 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;
/* required for MathML to suppress effects of ClearType "padding" */
gfxFont* CopyWithAntialiasOption(AntialiasOption anAAOption) const 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.
bool ProvidesGetGlyph() const override { return !mFontEntry->HasCmapTable(); }
uint32_t GetGlyph(uint32_t aUnicode, uint32_t aVarSelector) override;
bool ProvidesGlyphWidths() const override { return true; }
// get hinted glyph width in pixels as 16.16 fixed-point value
int32_t GetGlyphWidth(uint16_t aGID) override;
bool GetGlyphBounds(uint16_t aGID, gfxRect* aBounds, bool aTight) override;
void AddSizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf,
FontCacheSizes* aSizes) const;
void AddSizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf,
FontCacheSizes* aSizes) const;
FontType GetType() const override { return FONT_TYPE_GDI; }
~gfxGDIFont() override;
const Metrics& GetHorizontalMetrics() const override { return *mMetrics; }
bool ShapeText(DrawTarget* aDrawTarget, const char16_t* aText,
uint32_t aOffset, uint32_t aLength, Script aScript,
nsAtom* aLanguage, bool aVertical, RoundingFlags aRounding,
gfxShapedText* aShapedText) override;
void Initialize(); // creates metrics and Cairo fonts
// Fill the given LOGFONT record according to our size.
// (Synthetic italic is *not* handled here, because GDI may not reliably
// use the face we expect if we tweak the lfItalic field, and because we
// have generic support for this in gfxFont::Draw instead.)
void FillLogFont(LOGFONTW& aLogFont, gfxFloat aSize);
HFONT mFont;
Metrics* mMetrics;
bool mIsBitmap;
bool mNeedsSyntheticBold;
// cache of glyph IDs (used for non-sfnt fonts only)
mozilla::UniquePtr<nsTHashMap<nsUint32HashKey, uint32_t> > mGlyphIDs;
SCRIPT_CACHE mScriptCache;
// cache of glyph widths in 16.16 fixed-point pixels
mozilla::UniquePtr<nsTHashMap<nsUint32HashKey, int32_t> > mGlyphWidths;
#endif /* GFX_GDIFONT_H */