gecko/gfx/thebes/public/gfxFT2Fonts.h

223 lines
7.6 KiB
C++

/* -*- 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) 2005
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Vladimir Vukicevic <vladimir@mozilla.com>
* Masayuki Nakano <masayuki@d-toybox.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_FT2FONTS_H
#define GFX_FT2FONTS_H
#include "cairo.h"
#include "gfxTypes.h"
#include "gfxFont.h"
#include "gfxFT2FontBase.h"
#include "gfxContext.h"
#include "gfxFontUtils.h"
#include "gfxUserFontSet.h"
typedef struct FT_FaceRec_* FT_Face;
/**
* FontFamily is a class that describes one of the fonts on the users system. It holds
* each FontEntry (maps more directly to a font face) which holds font type, charset info
* and character map info.
*/
class FontEntry;
class FontFamily : public gfxFontFamily
{
public:
FontFamily(const nsAString& aName) :
gfxFontFamily(aName) { }
FontEntry *FindFontEntry(const gfxFontStyle& aFontStyle);
protected:
virtual PRBool FindWeightsForStyle(gfxFontEntry* aFontsForWeights[],
PRBool anItalic, PRInt16 aStretch);
};
class FontEntry : public gfxFontEntry
{
public:
FontEntry(const nsAString& aFaceName) :
gfxFontEntry(aFaceName)
{
mFTFace = nsnull;
mFontFace = nsnull;
mFTFontIndex = 0;
}
FontEntry(const FontEntry& aFontEntry);
~FontEntry();
const nsString& GetName() const {
return mFaceName;
}
static FontEntry*
CreateFontEntry(const gfxProxyFontEntry &aProxyEntry,
const PRUint8 *aFontData, PRUint32 aLength);
static FontEntry*
CreateFontEntryFromFace(FT_Face aFace, const PRUint8 *aFontData = nsnull);
// aFontData is NS_Malloc'ed data that aFace depends on, to be freed
// after the face is destroyed; null if there is no such buffer
cairo_font_face_t *CairoFontFace();
nsresult ReadCMAP();
FT_Face mFTFace;
cairo_font_face_t *mFontFace;
nsString mFaceName;
nsCString mFilename;
PRUint8 mFTFontIndex;
};
class gfxFT2Font : public gfxFT2FontBase {
public: // new functions
gfxFT2Font(cairo_scaled_font_t *aCairoFont,
FontEntry *aFontEntry,
const gfxFontStyle *aFontStyle);
virtual ~gfxFT2Font ();
cairo_font_face_t *CairoFontFace();
FontEntry *GetFontEntry();
static already_AddRefed<gfxFT2Font>
GetOrMakeFont(const nsAString& aName, const gfxFontStyle *aStyle);
static already_AddRefed<gfxFT2Font>
GetOrMakeFont(FontEntry *aFontEntry, const gfxFontStyle *aStyle);
struct CachedGlyphData {
CachedGlyphData()
: glyphIndex(0xffffffffU) { }
CachedGlyphData(PRUint32 gid)
: glyphIndex(gid) { }
PRUint32 glyphIndex;
PRInt32 lsbDelta;
PRInt32 rsbDelta;
PRInt32 xAdvance;
};
const CachedGlyphData* GetGlyphDataForChar(PRUint32 ch) {
CharGlyphMapEntryType *entry = mCharGlyphCache.PutEntry(ch);
if (!entry)
return nsnull;
if (entry->mData.glyphIndex == 0xffffffffU) {
// this is a new entry, fill it
FillGlyphDataForChar(ch, &entry->mData);
}
return &entry->mData;
}
protected:
void FillGlyphDataForChar(PRUint32 ch, CachedGlyphData *gd);
typedef nsBaseHashtableET<nsUint32HashKey, CachedGlyphData> CharGlyphMapEntryType;
typedef nsTHashtable<CharGlyphMapEntryType> CharGlyphMap;
CharGlyphMap mCharGlyphCache;
};
class THEBES_API gfxFT2FontGroup : public gfxFontGroup {
public: // new functions
gfxFT2FontGroup (const nsAString& families,
const gfxFontStyle *aStyle);
virtual ~gfxFT2FontGroup ();
inline gfxFT2Font *GetFontAt (PRInt32 i) {
// If it turns out to be hard for all clients that cache font
// groups to call UpdateFontList at appropriate times, we could
// instead consider just calling UpdateFontList from someplace
// more central (such as here).
NS_ASSERTION(!mUserFontSet || mCurrGeneration == GetGeneration(),
"Whoever was caching this font group should have "
"called UpdateFontList on it");
NS_ASSERTION(mFonts.Length() > PRUint32(i),
"Requesting a font index that doesn't exist");
return static_cast <gfxFT2Font *>(static_cast <gfxFont *>(mFonts[i]));
}
protected: // from gfxFontGroup
virtual gfxTextRun *MakeTextRun(const PRUnichar *aString,
PRUint32 aLength,
const Parameters *aParams,
PRUint32 aFlags);
virtual gfxTextRun *MakeTextRun(const PRUint8 *aString,
PRUint32 aLength,
const Parameters *aParams,
PRUint32 aFlags);
virtual gfxFontGroup *Copy(const gfxFontStyle *aStyle);
protected: // new functions
void InitTextRun(gfxTextRun *aTextRun);
void CreateGlyphRunsFT(gfxTextRun *aTextRun);
void AddRange(gfxTextRun *aTextRun, gfxFT2Font *font, const PRUnichar *str, PRUint32 offset, PRUint32 len);
static PRBool FontCallback (const nsAString & fontName,
const nsACString & genericName,
void *closure);
PRBool mEnableKerning;
void GetPrefFonts(const char *aLangGroup,
nsTArray<nsRefPtr<FontEntry> >& aFontEntryList);
void GetCJKPrefFonts(nsTArray<nsRefPtr<FontEntry> >& aFontEntryList);
void FamilyListToArrayList(const nsString& aFamilies,
const nsCString& aLangGroup,
nsTArray<nsRefPtr<FontEntry> > *aFontEntryList);
already_AddRefed<gfxFT2Font> WhichFontSupportsChar(const nsTArray<nsRefPtr<FontEntry> >& aFontEntryList,
PRUint32 aCh);
already_AddRefed<gfxFont> WhichPrefFontSupportsChar(PRUint32 aCh);
already_AddRefed<gfxFont> WhichSystemFontSupportsChar(PRUint32 aCh);
nsTArray<gfxTextRange> mRanges;
nsString mString;
};
#endif /* GFX_FT2FONTS_H */