The Tor Browser: gfx/thebes/gfxGDIFont.h@97036ab72558

Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

     1 /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-

     2  * This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 #ifndef GFX_GDIFONT_H

     7 #define GFX_GDIFONT_H

     9 #include "mozilla/MemoryReporting.h"

    10 #include "gfxFont.h"

    11 #include "gfxGDIFontList.h"

    13 #include "nsDataHashtable.h"

    14 #include "nsHashKeys.h"

    16 #include "cairo.h"

    18 class gfxGDIFont : public gfxFont

    19 {

    20 public:

    21     gfxGDIFont(GDIFontEntry *aFontEntry,

    22                const gfxFontStyle *aFontStyle,

    23                bool aNeedsBold,

    24                AntialiasOption anAAOption = kAntialiasDefault);

    26     virtual ~gfxGDIFont();

    28     HFONT GetHFONT() { if (!mMetrics) Initialize(); return mFont; }

    30     gfxFloat GetAdjustedSize() { if (!mMetrics) Initialize(); return mAdjustedSize; }

    32     cairo_font_face_t   *CairoFontFace() { return mFontFace; }

    33     cairo_scaled_font_t *CairoScaledFont() { return mScaledFont; }

    35     /* overrides for the pure virtual methods in gfxFont */

    36     virtual const gfxFont::Metrics& GetMetrics();

    38     virtual uint32_t GetSpaceGlyph();

    40     virtual bool SetupCairoFont(gfxContext *aContext);

    42     /* override Measure to add padding for antialiasing */

    43     virtual RunMetrics Measure(gfxTextRun *aTextRun,

    44                                uint32_t aStart, uint32_t aEnd,

    45                                BoundingBoxType aBoundingBoxType,

    46                                gfxContext *aContextForTightBoundingBox,

    47                                Spacing *aSpacing);

    49     /* required for MathML to suppress effects of ClearType "padding" */

    50     virtual gfxFont* CopyWithAntialiasOption(AntialiasOption anAAOption);

    52     virtual bool ProvidesGlyphWidths() { return true; }

    54     // get hinted glyph width in pixels as 16.16 fixed-point value

    55     virtual int32_t GetGlyphWidth(gfxContext *aCtx, uint16_t aGID);

    57     virtual void AddSizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf,

    58                                         FontCacheSizes* aSizes) const;

    59     virtual void AddSizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf,

    60                                         FontCacheSizes* aSizes) const;

    62     virtual FontType GetType() const { return FONT_TYPE_GDI; }

    64 protected:

    65     virtual void CreatePlatformShaper();

    67     /* override to check for uniscribe failure and fall back to GDI */

    68     virtual bool ShapeText(gfxContext      *aContext,

    69                            const char16_t *aText,

    70                            uint32_t         aOffset,

    71                            uint32_t         aLength,

    72                            int32_t          aScript,

    73                            gfxShapedText   *aShapedText,

    74                            bool             aPreferPlatformShaping);

    76     void Initialize(); // creates metrics and Cairo fonts

    78     // Fill the given LOGFONT record according to our style, but don't adjust

    79     // the lfItalic field if we're going to use a cairo transform for fake

    80     // italics.

    81     void FillLogFont(LOGFONTW& aLogFont, gfxFloat aSize, bool aUseGDIFakeItalic);

    83     // mPlatformShaper is used for the GDI shaper, mUniscribeShaper

    84     // for the Uniscribe version if needed

    85     nsAutoPtr<gfxFontShaper>   mUniscribeShaper;

    87     HFONT                 mFont;

    88     cairo_font_face_t    *mFontFace;

    90     Metrics              *mMetrics;

    91     uint32_t              mSpaceGlyph;

    93     bool                  mNeedsBold;

    95     // cache of glyph widths in 16.16 fixed-point pixels

    96     nsAutoPtr<nsDataHashtable<nsUint32HashKey,int32_t> > mGlyphWidths;

    97 };

    99 #endif /* GFX_GDIFONT_H */

The Tor Browser / file revision

gfx/thebes/gfxGDIFont.h@97036ab72558

gfx/thebes/gfxGDIFont.h