gecko/gfx/thebes/gfxGDIFont.h

121 lines
4.4 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) 2005-2010
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Stuart Parmenter <stuart@mozilla.com>
* Masayuki Nakano <masayuki@d-toybox.com>
* John Daggett <jdaggett@mozilla.com>
* Jonathan Kew <jfkthame@gmail.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_GDIFONT_H
#define GFX_GDIFONT_H
#include "gfxFont.h"
#include "gfxGDIFontList.h"
#include "nsDataHashtable.h"
#include "nsHashKeys.h"
#include "cairo.h"
class gfxGDIFont : public gfxFont
{
public:
gfxGDIFont(GDIFontEntry *aFontEntry,
const gfxFontStyle *aFontStyle,
bool aNeedsBold,
AntialiasOption anAAOption = kAntialiasDefault);
virtual ~gfxGDIFont();
HFONT GetHFONT() { if (!mMetrics) Initialize(); return mFont; }
gfxFloat GetAdjustedSize() { if (!mMetrics) Initialize(); return mAdjustedSize; }
cairo_font_face_t *CairoFontFace() { return mFontFace; }
cairo_scaled_font_t *CairoScaledFont() { return mScaledFont; }
/* overrides for the pure virtual methods in gfxFont */
virtual const gfxFont::Metrics& GetMetrics();
virtual PRUint32 GetSpaceGlyph();
virtual bool SetupCairoFont(gfxContext *aContext);
/* override Measure to add padding for antialiasing */
virtual RunMetrics Measure(gfxTextRun *aTextRun,
PRUint32 aStart, PRUint32 aEnd,
BoundingBoxType aBoundingBoxType,
gfxContext *aContextForTightBoundingBox,
Spacing *aSpacing);
/* required for MathML to suppress effects of ClearType "padding" */
virtual gfxFont* CopyWithAntialiasOption(AntialiasOption anAAOption);
virtual bool ProvidesGlyphWidths() { return true; }
// get hinted glyph width in pixels as 16.16 fixed-point value
virtual PRInt32 GetGlyphWidth(gfxContext *aCtx, PRUint16 aGID);
protected:
virtual void CreatePlatformShaper();
/* override to check for uniscribe failure and fall back to GDI */
virtual bool ShapeWord(gfxContext *aContext,
gfxShapedWord *aShapedWord,
const PRUnichar *aString,
bool aPreferPlatformShaping = false);
void Initialize(); // creates metrics and Cairo fonts
void FillLogFont(LOGFONTW& aLogFont, gfxFloat aSize);
// mPlatformShaper is used for the GDI shaper, mUniscribeShaper
// for the Uniscribe version if needed
nsAutoPtr<gfxFontShaper> mUniscribeShaper;
HFONT mFont;
cairo_font_face_t *mFontFace;
Metrics *mMetrics;
PRUint32 mSpaceGlyph;
bool mNeedsBold;
// cache of glyph widths in 16.16 fixed-point pixels
nsDataHashtable<nsUint32HashKey,PRInt32> mGlyphWidths;
};
#endif /* GFX_GDIFONT_H */