gecko/gfx/thebes/public/gfxPangoFonts.h

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8.2 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_PANGOFONTS_H
#define GFX_PANGOFONTS_H
#include "cairo.h"
#include "gfxTypes.h"
#include "gfxFont.h"
#include <pango/pango.h>
#include <X11/Xft/Xft.h>
// Control when we use Xft directly, bypassing Pango
// Enable this to use Xft to glyph-convert 8bit-only textruns, but use Pango
// to shape any textruns with non-8bit characters
#define ENABLE_XFT_FAST_PATH_8BIT
// Enable this to use Xft to glyph-convert all textruns
// #define ENABLE_XFT_FAST_PATH_ALWAYS
#include "nsDataHashtable.h"
#include "nsClassHashtable.h"
class FontSelector;
class gfxPangoTextRun;
class gfxPangoFont : public gfxFont {
public:
gfxPangoFont (const nsAString& aName,
const gfxFontStyle *aFontStyle);
virtual ~gfxPangoFont ();
static void Shutdown();
virtual const gfxFont::Metrics& GetMetrics();
PangoFontDescription *GetPangoFontDescription() { RealizeFont(); return mPangoFontDesc; }
PangoContext *GetPangoContext() { RealizeFont(); return mPangoCtx; }
void GetMozLang(nsACString &aMozLang);
void GetActualFontFamily(nsACString &aFamily);
XftFont *GetXftFont () { RealizeXftFont (); return mXftFont; }
PangoFont *GetPangoFont() { RealizePangoFont(); return mPangoFont; }
gfxFloat GetAdjustedSize() { RealizeFont(); return mAdjustedSize; }
PRBool HasGlyph(const PRUint32 aChar);
PRUint32 GetGlyph(const PRUint32 aChar);
virtual gfxTextRun::Metrics Measure(gfxTextRun *aTextRun,
PRUint32 aStart, PRUint32 aEnd,
PRBool aTightBoundingBox,
Spacing *aSpacing);
virtual nsString GetUniqueName();
// Get the glyphID of a space
virtual PRUint32 GetSpaceGlyph() {
GetMetrics();
return mSpaceGlyph;
}
protected:
PangoFontDescription *mPangoFontDesc;
PangoContext *mPangoCtx;
XftFont *mXftFont;
PangoFont *mPangoFont;
PangoFont *mGlyphTestingFont;
cairo_scaled_font_t *mCairoFont;
PRBool mHasMetrics;
PRUint32 mSpaceGlyph;
Metrics mMetrics;
gfxFloat mAdjustedSize;
void RealizeFont(PRBool force = PR_FALSE);
void RealizeXftFont(PRBool force = PR_FALSE);
void RealizePangoFont(PRBool aForce = PR_FALSE);
void GetCharSize(const char aChar, gfxSize& aInkSize, gfxSize& aLogSize,
PRUint32 *aGlyphID = nsnull);
virtual void SetupCairoFont(cairo_t *aCR);
};
class FontSelector;
class THEBES_API gfxPangoFontGroup : public gfxFontGroup {
public:
gfxPangoFontGroup (const nsAString& families,
const gfxFontStyle *aStyle);
virtual ~gfxPangoFontGroup ();
virtual gfxFontGroup *Copy(const gfxFontStyle *aStyle);
// Create and initialize a textrun using Pango (or Xft)
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);
gfxPangoFont *GetFontAt(PRInt32 i) {
return NS_STATIC_CAST(gfxPangoFont*,
NS_STATIC_CAST(gfxFont*, mFonts[i]));
}
protected:
friend class FontSelector;
// ****** Textrun glyph conversion helpers ******
void InitTextRun(gfxTextRun *aTextRun, const gchar *aUTF8Text,
PRUint32 aUTF8Length, PRUint32 aUTF8HeaderLength);
// Returns NS_ERROR_FAILURE if there's a missing glyph
nsresult SetGlyphs(gfxTextRun *aTextRun, gfxPangoFont *aFont,
const gchar *aUTF8, PRUint32 aUTF8Length,
PRUint32 *aUTF16Offset, PangoGlyphString *aGlyphs,
PangoGlyphUnit aOverrideSpaceWidth,
PRBool aAbortOnMissingGlyph);
nsresult SetMissingGlyphs(gfxTextRun *aTextRun,
const gchar *aUTF8, PRUint32 aUTF8Length,
PRUint32 *aUTF16Offset);
void CreateGlyphRunsItemizing(gfxTextRun *aTextRun,
const gchar *aUTF8, PRUint32 aUTF8Length,
PRUint32 aUTF8HeaderLength);
#if defined(ENABLE_XFT_FAST_PATH_8BIT) || defined(ENABLE_XFT_FAST_PATH_ALWAYS)
void CreateGlyphRunsXft(gfxTextRun *aTextRun,
const gchar *aUTF8, PRUint32 aUTF8Length);
#endif
static PRBool FontCallback (const nsAString& fontName,
const nsACString& genericName,
void *closure);
private:
nsTArray<gfxFontStyle> mAdditionalStyles;
};
class gfxPangoFontWrapper {
public:
gfxPangoFontWrapper(PangoFont *aFont) {
mFont = aFont;
g_object_ref(mFont);
}
~gfxPangoFontWrapper() {
if (mFont)
g_object_unref(mFont);
}
PangoFont* Get() { return mFont; }
private:
PangoFont *mFont;
};
class gfxPangoFontCache
{
public:
gfxPangoFontCache();
~gfxPangoFontCache();
static gfxPangoFontCache* GetPangoFontCache() {
if (!sPangoFontCache)
sPangoFontCache = new gfxPangoFontCache();
return sPangoFontCache;
}
static void Shutdown() {
if (sPangoFontCache)
delete sPangoFontCache;
sPangoFontCache = nsnull;
}
void Put(const PangoFontDescription *aFontDesc, PangoFont *aPangoFont);
PangoFont* Get(const PangoFontDescription *aFontDesc);
private:
static gfxPangoFontCache *sPangoFontCache;
nsClassHashtable<nsUint32HashKey, gfxPangoFontWrapper> mPangoFonts;
};
// XXX we should remove this class, because this class is used only in |HasGlyph| of gfxPangoFont.
// But it can use fontconfig directly after bug 366664.
class gfxPangoFontNameMap
{
public:
gfxPangoFontNameMap();
~gfxPangoFontNameMap();
static gfxPangoFontNameMap* GetPangoFontNameMap() {
if (!sPangoFontNameMap)
sPangoFontNameMap = new gfxPangoFontNameMap();
return sPangoFontNameMap;
}
static void Shutdown() {
if (sPangoFontNameMap)
delete sPangoFontNameMap;
sPangoFontNameMap = nsnull;
}
void Put(const nsACString &aName, PangoFont *aPangoFont);
PangoFont* Get(const nsACString &aName);
private:
static gfxPangoFontNameMap *sPangoFontNameMap;
nsClassHashtable<nsCStringHashKey, gfxPangoFontWrapper> mPangoFonts;
};
#endif /* GFX_PANGOFONTS_H */