The Tor Browser: gfx/thebes/gfxDWriteFonts.h@b8a032363ba2

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     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_WINDOWSDWRITEFONTS_H

     7 #define GFX_WINDOWSDWRITEFONTS_H

     9 #include "mozilla/MemoryReporting.h"

    10 #include <dwrite.h>

    12 #include "gfxFont.h"

    13 #include "gfxUserFontSet.h"

    14 #include "cairo-win32.h"

    16 #include "nsDataHashtable.h"

    17 #include "nsHashKeys.h"

    19 /**

    20  * \brief Class representing a font face for a font entry.

    21  */

    22 class gfxDWriteFont : public gfxFont

    23 {

    24 public:

    25     gfxDWriteFont(gfxFontEntry *aFontEntry,

    26                   const gfxFontStyle *aFontStyle,

    27                   bool aNeedsBold = false,

    28                   AntialiasOption = kAntialiasDefault);

    29     ~gfxDWriteFont();

    31     virtual gfxFont* CopyWithAntialiasOption(AntialiasOption anAAOption);

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

    35     virtual uint32_t GetSpaceGlyph();

    37     virtual bool SetupCairoFont(gfxContext *aContext);

    39     virtual bool AllowSubpixelAA() { return mAllowManualShowGlyphs; }

    41     virtual bool IsValid();

    43     gfxFloat GetAdjustedSize() {

    44         return mAdjustedSize;

    45     }

    47     IDWriteFontFace *GetFontFace();

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

    50     virtual RunMetrics Measure(gfxTextRun *aTextRun,

    51                                uint32_t aStart, uint32_t aEnd,

    52                                BoundingBoxType aBoundingBoxType,

    53                                gfxContext *aContextForTightBoundingBox,

    54                                Spacing *aSpacing);

    56     virtual bool ProvidesGlyphWidths();

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

    60     virtual mozilla::TemporaryRef<mozilla::gfx::GlyphRenderingOptions> GetGlyphRenderingOptions();

    62     virtual void AddSizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf,

    63                                         FontCacheSizes* aSizes) const;

    64     virtual void AddSizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf,

    65                                         FontCacheSizes* aSizes) const;

    67     virtual FontType GetType() const { return FONT_TYPE_DWRITE; }

    69     virtual mozilla::TemporaryRef<mozilla::gfx::ScaledFont> GetScaledFont(mozilla::gfx::DrawTarget *aTarget);

    71     virtual cairo_scaled_font_t *GetCairoScaledFont();

    73 protected:

    74     friend class gfxDWriteShaper;

    76     virtual void CreatePlatformShaper();

    78     bool GetFakeMetricsForArialBlack(DWRITE_FONT_METRICS *aFontMetrics);

    80     void ComputeMetrics(AntialiasOption anAAOption);

    82     bool HasBitmapStrikeForSize(uint32_t aSize);

    84     cairo_font_face_t *CairoFontFace();

    86     gfxFloat MeasureGlyphWidth(uint16_t aGlyph);

    88     DWRITE_MEASURING_MODE GetMeasuringMode();

    89     bool GetForceGDIClassic();

    91     nsRefPtr<IDWriteFontFace> mFontFace;

    92     cairo_font_face_t *mCairoFontFace;

    94     gfxFont::Metrics          *mMetrics;

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

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

    99     bool mNeedsOblique;

   100     bool mNeedsBold;

   101     bool mUseSubpixelPositions;

   102     bool mAllowManualShowGlyphs;

   103     bool mAzureScaledFontIsCairo;

   104 };

   106 #endif

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