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Mypal/gfx/thebes/gfxDWriteFontList.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_DWRITEFONTLIST_H
#define GFX_DWRITEFONTLIST_H
#include "mozilla/MemoryReporting.h"
#include "gfxDWriteCommon.h"
#include "gfxFont.h"
#include "gfxUserFontSet.h"
#include "cairo-win32.h"
#include "gfxPlatformFontList.h"
#include "gfxPlatform.h"
#include <algorithm>
/**
* gfxDWriteFontFamily is a class that describes one of the fonts on the
* users system. It holds each gfxDWriteFontEntry (maps more directly to
* a font face) which holds font type, charset info and character map info.
*/
class gfxDWriteFontEntry;
/**
* \brief Class representing directwrite font family.
*/
class gfxDWriteFontFamily : public gfxFontFamily
{
public:
/**
* Constructs a new DWriteFont Family.
*
* \param aName Name identifying the family
* \param aFamily IDWriteFontFamily object representing the directwrite
* family object.
*/
gfxDWriteFontFamily(const nsAString& aName,
IDWriteFontFamily *aFamily)
: gfxFontFamily(aName), mDWFamily(aFamily), mForceGDIClassic(false) {}
virtual ~gfxDWriteFontFamily();
void FindStyleVariations(FontInfoData *aFontInfoData = nullptr) final;
void LocalizedName(nsAString& aLocalizedName) final;
void ReadFaceNames(gfxPlatformFontList *aPlatformFontList,
bool aNeedFullnamePostscriptNames,
FontInfoData *aFontInfoData = nullptr) final;
void SetForceGDIClassic(bool aForce) { mForceGDIClassic = aForce; }
void AddSizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf,
FontListSizes* aSizes) const final;
void AddSizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf,
FontListSizes* aSizes) const final;
protected:
/** This font family's directwrite fontfamily object */
RefPtr<IDWriteFontFamily> mDWFamily;
bool mForceGDIClassic;
};
/**
* \brief Class representing DirectWrite FontEntry (a unique font style/family)
*/
class gfxDWriteFontEntry : public gfxFontEntry
{
public:
/**
* Constructs a font entry.
*
* \param aFaceName The name of the corresponding font face.
* \param aFont DirectWrite font object
*/
gfxDWriteFontEntry(const nsAString& aFaceName,
IDWriteFont *aFont)
: gfxFontEntry(aFaceName), mFont(aFont), mFontFile(nullptr),
mForceGDIClassic(false)
{
DWRITE_FONT_STYLE dwriteStyle = aFont->GetStyle();
mStyle = (dwriteStyle == DWRITE_FONT_STYLE_ITALIC ?
NS_FONT_STYLE_ITALIC :
(dwriteStyle == DWRITE_FONT_STYLE_OBLIQUE ?
NS_FONT_STYLE_OBLIQUE : NS_FONT_STYLE_NORMAL));
mStretch = FontStretchFromDWriteStretch(aFont->GetStretch());
uint16_t weight = NS_ROUNDUP(aFont->GetWeight() - 50, 100);
weight = std::max<uint16_t>(100, weight);
weight = std::min<uint16_t>(900, weight);
mWeight = weight;
mIsCJK = UNINITIALIZED_VALUE;
}
/**
* Constructs a font entry using a font. But with custom font values.
* This is used for creating correct font entries for @font-face with local
* font source.
*
* \param aFaceName The name of the corresponding font face.
* \param aFont DirectWrite font object
* \param aWeight Weight of the font
* \param aStretch Stretch of the font
* \param aStyle italic or oblique of font
*/
gfxDWriteFontEntry(const nsAString& aFaceName,
IDWriteFont *aFont,
uint16_t aWeight,
int16_t aStretch,
uint8_t aStyle)
: gfxFontEntry(aFaceName), mFont(aFont), mFontFile(nullptr),
mForceGDIClassic(false)
{
mWeight = aWeight;
mStretch = aStretch;
mStyle = aStyle;
mIsLocalUserFont = true;
mIsCJK = UNINITIALIZED_VALUE;
}
/**
* Constructs a font entry using a font file.
*
* \param aFaceName The name of the corresponding font face.
* \param aFontFile DirectWrite fontfile object
* \param aFontFileStream DirectWrite fontfile stream object
* \param aWeight Weight of the font
* \param aStretch Stretch of the font
* \param aStyle italic or oblique of font
*/
gfxDWriteFontEntry(const nsAString& aFaceName,
IDWriteFontFile *aFontFile,
IDWriteFontFileStream *aFontFileStream,
uint16_t aWeight,
int16_t aStretch,
uint8_t aStyle)
: gfxFontEntry(aFaceName), mFont(nullptr), mFontFile(aFontFile),
mFontFileStream(aFontFileStream), mForceGDIClassic(false)
{
mWeight = aWeight;
mStretch = aStretch;
mStyle = aStyle;
mIsDataUserFont = true;
mIsCJK = UNINITIALIZED_VALUE;
}
virtual ~gfxDWriteFontEntry();
virtual bool IsSymbolFont();
virtual hb_blob_t* GetFontTable(uint32_t aTableTag) override;
nsresult ReadCMAP(FontInfoData *aFontInfoData = nullptr);
bool IsCJKFont();
void SetForceGDIClassic(bool aForce) { mForceGDIClassic = aForce; }
bool GetForceGDIClassic() { return mForceGDIClassic; }
virtual void AddSizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf,
FontListSizes* aSizes) const;
virtual void AddSizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf,
FontListSizes* aSizes) const;
protected:
friend class gfxDWriteFont;
friend class gfxDWriteFontList;
virtual nsresult CopyFontTable(uint32_t aTableTag,
nsTArray<uint8_t>& aBuffer) override;
virtual gfxFont *CreateFontInstance(const gfxFontStyle *aFontStyle,
bool aNeedsBold);
nsresult CreateFontFace(
IDWriteFontFace **aFontFace,
DWRITE_FONT_SIMULATIONS aSimulations = DWRITE_FONT_SIMULATIONS_NONE);
static bool InitLogFont(IDWriteFont *aFont, LOGFONTW *aLogFont);
/**
* A fontentry only needs to have either of these. If it has both only
* the IDWriteFont will be used.
*/
RefPtr<IDWriteFont> mFont;
RefPtr<IDWriteFontFile> mFontFile;
// For custom fonts, we hold a reference to the IDWriteFontFileStream for
// for the IDWriteFontFile, so that the data is available.
RefPtr<IDWriteFontFileStream> mFontFileStream;
// font face corresponding to the mFont/mFontFile *without* any DWrite
// style simulations applied
RefPtr<IDWriteFontFace> mFontFace;
DWRITE_FONT_FACE_TYPE mFaceType;
int8_t mIsCJK;
bool mForceGDIClassic;
};
// custom text renderer used to determine the fallback font for a given char
class DWriteFontFallbackRenderer final : public IDWriteTextRenderer
{
public:
DWriteFontFallbackRenderer(IDWriteFactory *aFactory)
: mRefCount(0)
{
HRESULT hr = S_OK;
hr = aFactory->GetSystemFontCollection(getter_AddRefs(mSystemFonts));
NS_ASSERTION(SUCCEEDED(hr), "GetSystemFontCollection failed!");
}
~DWriteFontFallbackRenderer()
{}
// IDWriteTextRenderer methods
IFACEMETHOD(DrawGlyphRun)(
void* clientDrawingContext,
FLOAT baselineOriginX,
FLOAT baselineOriginY,
DWRITE_MEASURING_MODE measuringMode,
DWRITE_GLYPH_RUN const* glyphRun,
DWRITE_GLYPH_RUN_DESCRIPTION const* glyphRunDescription,
IUnknown* clientDrawingEffect
);
IFACEMETHOD(DrawUnderline)(
void* clientDrawingContext,
FLOAT baselineOriginX,
FLOAT baselineOriginY,
DWRITE_UNDERLINE const* underline,
IUnknown* clientDrawingEffect
)
{
return E_NOTIMPL;
}
IFACEMETHOD(DrawStrikethrough)(
void* clientDrawingContext,
FLOAT baselineOriginX,
FLOAT baselineOriginY,
DWRITE_STRIKETHROUGH const* strikethrough,
IUnknown* clientDrawingEffect
)
{
return E_NOTIMPL;
}
IFACEMETHOD(DrawInlineObject)(
void* clientDrawingContext,
FLOAT originX,
FLOAT originY,
IDWriteInlineObject* inlineObject,
BOOL isSideways,
BOOL isRightToLeft,
IUnknown* clientDrawingEffect
)
{
return E_NOTIMPL;
}
// IDWritePixelSnapping methods
IFACEMETHOD(IsPixelSnappingDisabled)(
void* clientDrawingContext,
BOOL* isDisabled
)
{
*isDisabled = FALSE;
return S_OK;
}
IFACEMETHOD(GetCurrentTransform)(
void* clientDrawingContext,
DWRITE_MATRIX* transform
)
{
const DWRITE_MATRIX ident = {1.0, 0.0, 0.0, 1.0, 0.0, 0.0};
*transform = ident;
return S_OK;
}
IFACEMETHOD(GetPixelsPerDip)(
void* clientDrawingContext,
FLOAT* pixelsPerDip
)
{
*pixelsPerDip = 1.0f;
return S_OK;
}
// IUnknown methods
IFACEMETHOD_(unsigned long, AddRef) ()
{
return InterlockedIncrement(&mRefCount);
}
IFACEMETHOD_(unsigned long, Release) ()
{
unsigned long newCount = InterlockedDecrement(&mRefCount);
if (newCount == 0)
{
delete this;
return 0;
}
return newCount;
}
IFACEMETHOD(QueryInterface) (IID const& riid, void** ppvObject)
{
if (__uuidof(IDWriteTextRenderer) == riid) {
*ppvObject = this;
} else if (__uuidof(IDWritePixelSnapping) == riid) {
*ppvObject = this;
} else if (__uuidof(IUnknown) == riid) {
*ppvObject = this;
} else {
*ppvObject = nullptr;
return E_FAIL;
}
this->AddRef();
return S_OK;
}
const nsString& FallbackFamilyName() { return mFamilyName; }
protected:
long mRefCount;
RefPtr<IDWriteFontCollection> mSystemFonts;
nsString mFamilyName;
};
class gfxDWriteFontList : public gfxPlatformFontList {
public:
gfxDWriteFontList();
static gfxDWriteFontList* PlatformFontList() {
return static_cast<gfxDWriteFontList*>(sPlatformFontList);
}
// initialize font lists
virtual nsresult InitFontListForPlatform() override;
virtual gfxFontEntry* LookupLocalFont(const nsAString& aFontName,
uint16_t aWeight,
int16_t aStretch,
uint8_t aStyle);
virtual gfxFontEntry* MakePlatformFont(const nsAString& aFontName,
uint16_t aWeight,
int16_t aStretch,
uint8_t aStyle,
const uint8_t* aFontData,
uint32_t aLength);
bool GetStandardFamilyName(const nsAString& aFontName,
nsAString& aFamilyName);
IDWriteGdiInterop *GetGDIInterop() { return mGDIInterop; }
bool UseGDIFontTableAccess() { return mGDIFontTableAccess; }
bool FindAndAddFamilies(const nsAString& aFamily,
nsTArray<gfxFontFamily*>* aOutput,
gfxFontStyle* aStyle = nullptr,
gfxFloat aDevToCssSize = 1.0) override;
gfxFloat GetForceGDIClassicMaxFontSize() { return mForceGDIClassicMaxFontSize; }
virtual void AddSizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf,
FontListSizes* aSizes) const;
virtual void AddSizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf,
FontListSizes* aSizes) const;
protected:
virtual gfxFontFamily*
GetDefaultFontForPlatform(const gfxFontStyle* aStyle) override;
// attempt to use platform-specific fallback for the given character,
// return null if no usable result found
gfxFontEntry*
PlatformGlobalFontFallback(const uint32_t aCh,
Script aRunScript,
const gfxFontStyle* aMatchStyle,
gfxFontFamily** aMatchedFamily) override;
private:
friend class gfxDWriteFontFamily;
nsresult GetFontSubstitutes();
void GetDirectWriteSubstitutes();
virtual bool UsesSystemFallback() { return true; }
void GetFontsFromCollection(IDWriteFontCollection* aCollection);
#ifdef MOZ_BUNDLED_FONTS
already_AddRefed<IDWriteFontCollection>
CreateBundledFontsCollection(IDWriteFactory* aFactory);
#endif
/**
* Fonts listed in the registry as substitutes but for which no actual
* font family is found.
*/
nsTArray<nsString> mNonExistingFonts;
/**
* Table of font substitutes, we grab this from the registry to get
* alternative font names.
*/
FontFamilyTable mFontSubstitutes;
virtual already_AddRefed<FontInfoData> CreateFontInfoData();
gfxFloat mForceGDIClassicMaxFontSize;
// whether to use GDI font table access routines
bool mGDIFontTableAccess;
RefPtr<IDWriteGdiInterop> mGDIInterop;
RefPtr<DWriteFontFallbackRenderer> mFallbackRenderer;
RefPtr<IDWriteTextFormat> mFallbackFormat;
RefPtr<IDWriteFontCollection> mSystemFonts;
#ifdef MOZ_BUNDLED_FONTS
RefPtr<IDWriteFontCollection> mBundledFonts;
#endif
};
#endif /* GFX_DWRITEFONTLIST_H */
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