gfxDWriteFontList.h
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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* Contributor(s):
* Bas Schouten <bschouten@mozilla.com>
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#ifndef GFX_DWRITEFONTLIST_H
#define GFX_DWRITEFONTLIST_H
#include "gfxDWriteCommon.h"
#include "gfxFont.h"
#include "gfxUserFontSet.h"
#include "cairo-win32.h"
#include "gfxPlatformFontList.h"
/**
* 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) {}
virtual ~gfxDWriteFontFamily();
virtual void FindStyleVariations();
virtual void LocalizedName(nsAString& aLocalizedName);
protected:
/** This font family's directwrite fontfamily object */
nsRefPtr<IDWriteFontFamily> mDWFamily;
};
/**
* \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(nsnull)
{
mItalic = (aFont->GetStyle() == DWRITE_FONT_STYLE_ITALIC ||
aFont->GetStyle() == DWRITE_FONT_STYLE_OBLIQUE);
mStretch = FontStretchFromDWriteStretch(aFont->GetStretch());
PRUint16 weight = PR_ROUNDUP(aFont->GetWeight() - 50, 100);
weight = NS_MAX<PRUint16>(100, weight);
weight = NS_MIN<PRUint16>(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 aItalic True if italic
*/
gfxDWriteFontEntry(const nsAString& aFaceName,
IDWriteFont *aFont,
PRUint16 aWeight,
PRInt16 aStretch,
PRBool aItalic)
: gfxFontEntry(aFaceName), mFont(aFont), mFontFile(nsnull)
{
mWeight = aWeight;
mStretch = aStretch;
mItalic = aItalic;
mIsUserFont = PR_TRUE;
mIsLocalUserFont = PR_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 aWeight Weight of the font
* \param aStretch Stretch of the font
* \param aItalic True if italic
*/
gfxDWriteFontEntry(const nsAString& aFaceName,
IDWriteFontFile *aFontFile,
PRUint16 aWeight,
PRInt16 aStretch,
PRBool aItalic)
: gfxFontEntry(aFaceName), mFont(nsnull), mFontFile(aFontFile)
{
mWeight = aWeight;
mStretch = aStretch;
mItalic = aItalic;
mIsUserFont = PR_TRUE;
mIsCJK = UNINITIALIZED_VALUE;
}
virtual ~gfxDWriteFontEntry();
virtual PRBool IsSymbolFont();
virtual nsresult GetFontTable(PRUint32 aTableTag,
FallibleTArray<PRUint8>& aBuffer);
nsresult ReadCMAP();
PRBool IsCJKFont();
protected:
friend class gfxDWriteFont;
friend class gfxDWriteFontList;
virtual gfxFont *CreateFontInstance(const gfxFontStyle *aFontStyle,
PRBool aNeedsBold);
nsresult CreateFontFace(
IDWriteFontFace **aFontFace,
DWRITE_FONT_SIMULATIONS aSimulations = DWRITE_FONT_SIMULATIONS_NONE);
static PRBool InitLogFont(IDWriteFont *aFont, LOGFONTW *aLogFont);
/**
* A fontentry only needs to have either of these. If it has both only
* the IDWriteFont will be used.
*/
nsRefPtr<IDWriteFont> mFont;
nsRefPtr<IDWriteFontFile> mFontFile;
DWRITE_FONT_FACE_TYPE mFaceType;
PRBool mIsCJK;
};
class gfxDWriteFontList : public gfxPlatformFontList {
public:
gfxDWriteFontList();
static gfxDWriteFontList* PlatformFontList() {
return static_cast<gfxDWriteFontList*>(sPlatformFontList);
}
// initialize font lists
virtual nsresult InitFontList();
virtual gfxFontEntry* GetDefaultFont(const gfxFontStyle* aStyle,
PRBool& aNeedsBold);
virtual gfxFontEntry* LookupLocalFont(const gfxProxyFontEntry *aProxyEntry,
const nsAString& aFontName);
virtual gfxFontEntry* MakePlatformFont(const gfxProxyFontEntry *aProxyEntry,
const PRUint8 *aFontData,
PRUint32 aLength);
virtual PRBool ResolveFontName(const nsAString& aFontName,
nsAString& aResolvedFontName);
PRBool GetStandardFamilyName(const nsAString& aFontName,
nsAString& aFamilyName);
IDWriteGdiInterop *GetGDIInterop() { return mGDIInterop; }
PRBool UseGDIFontTableAccess() { return mGDIFontTableAccess; }
virtual gfxFontFamily* FindFamily(const nsAString& aFamily);
virtual void GetFontFamilyList(nsTArray<nsRefPtr<gfxFontFamily> >& aFamilyArray);
private:
friend class gfxDWriteFontFamily;
nsresult GetFontSubstitutes();
void GetDirectWriteSubstitutes();
/**
* Fonts listed in the registry as substitutes but for which no actual
* font family is found.
*/
nsTArray<nsString> mNonExistingFonts;
typedef nsDataHashtable<nsStringHashKey, nsRefPtr<gfxFontFamily> > FontTable;
/**
* Table of font substitutes, we grab this from the registry to get
* alternative font names.
*/
FontTable mFontSubstitutes;
PRBool mInitialized;
virtual nsresult DelayedInitFontList();
// whether to use GDI font table access routines
PRBool mGDIFontTableAccess;
nsRefPtr<IDWriteGdiInterop> mGDIInterop;
};
#endif /* GFX_DWRITEFONTLIST_H */
