gecko-dev/gfx/thebes/gfxDWriteFontList.h

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/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla Foundation code.
*
* The Initial Developer of the Original Code is Mozilla Foundation.
* Portions created by the Initial Developer are Copyright (C) 2010
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Bas Schouten <bschouten@mozilla.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#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;
}
/**
* 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;
}
/**
* 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;
}
virtual ~gfxDWriteFontEntry();
virtual PRBool IsSymbolFont();
virtual nsresult GetFontTable(PRUint32 aTableTag,
nsTArray<PRUint8>& aBuffer);
nsresult ReadCMAP();
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);
/**
* 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;
};
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);
private:
friend class gfxDWriteFontFamily;
nsresult GetFontSubstitutes();
/**
* 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;
};
#endif /* GFX_DWRITEFONTLIST_H */