gecko-dev/gfx/thebes/gfxDWriteFonts.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_WINDOWSDWRITEFONTS_H
#define GFX_WINDOWSDWRITEFONTS_H
#include <dwrite.h>
#include "gfxFont.h"
#include "gfxUserFontSet.h"
#include "cairo-win32.h"
#include "nsDataHashtable.h"
#include "nsHashKeys.h"
/**
* \brief Class representing a font face for a font entry.
*/
class gfxDWriteFont : public gfxFont
{
public:
gfxDWriteFont(gfxFontEntry *aFontEntry,
const gfxFontStyle *aFontStyle,
PRBool aNeedsBold = PR_FALSE,
AntialiasOption = kAntialiasDefault);
~gfxDWriteFont();
virtual gfxFont* CopyWithAntialiasOption(AntialiasOption anAAOption);
virtual const gfxFont::Metrics& GetMetrics();
virtual PRUint32 GetSpaceGlyph();
virtual PRBool SetupCairoFont(gfxContext *aContext);
virtual PRBool IsValid();
gfxFloat GetAdjustedSize() {
return mAdjustedSize;
}
IDWriteFontFace *GetFontFace();
/* override Measure to add padding for antialiasing */
virtual RunMetrics Measure(gfxTextRun *aTextRun,
PRUint32 aStart, PRUint32 aEnd,
BoundingBoxType aBoundingBoxType,
gfxContext *aContextForTightBoundingBox,
Spacing *aSpacing);
// override gfxFont table access function to bypass gfxFontEntry cache,
// use DWrite API to get direct access to system font data
virtual hb_blob_t *GetFontTable(PRUint32 aTag);
virtual PRBool ProvidesGlyphWidths();
virtual PRInt32 GetGlyphWidth(gfxContext *aCtx, PRUint16 aGID);
protected:
friend class gfxDWriteShaper;
virtual void CreatePlatformShaper();
PRBool GetFakeMetricsForArialBlack(DWRITE_FONT_METRICS *aFontMetrics);
void ComputeMetrics(AntialiasOption anAAOption);
PRBool HasBitmapStrikeForSize(PRUint32 aSize);
cairo_font_face_t *CairoFontFace();
cairo_scaled_font_t *CairoScaledFont();
gfxFloat MeasureGlyphWidth(PRUint16 aGlyph);
static void DestroyBlobFunc(void* userArg);
DWRITE_MEASURING_MODE GetMeasuringMode();
bool GetForceGDIClassic();
nsRefPtr<IDWriteFontFace> mFontFace;
cairo_font_face_t *mCairoFontFace;
cairo_scaled_font_t *mCairoScaledFont;
gfxFont::Metrics *mMetrics;
// cache of glyph widths in 16.16 fixed-point pixels
nsDataHashtable<nsUint32HashKey,PRInt32> mGlyphWidths;
PRPackedBool mNeedsOblique;
PRPackedBool mNeedsBold;
PRPackedBool mUseSubpixelPositions;
PRPackedBool mAllowManualShowGlyphs;
};
#endif