gecko-dev/gfx/thebes/gfxGraphiteShaper.h

64 строки
1.7 KiB
C++

/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef GFX_GRAPHITESHAPER_H
#define GFX_GRAPHITESHAPER_H
#include "gfxTypes.h"
#include "gfxFont.h"
#include "nsDataHashtable.h"
#include "nsHashKeys.h"
struct gr_face;
struct gr_font;
struct gr_segment;
class gfxGraphiteShaper : public gfxFontShaper {
public:
gfxGraphiteShaper(gfxFont *aFont);
virtual ~gfxGraphiteShaper();
virtual bool ShapeWord(gfxContext *aContext,
gfxShapedWord *aShapedWord,
const PRUnichar *aText);
const void* GetTable(uint32_t aTag, size_t *aLength);
static void Shutdown();
struct CallbackData {
gfxFont *mFont;
gfxGraphiteShaper *mShaper;
gfxContext *mContext;
};
struct TableRec {
hb_blob_t *mBlob;
const void *mData;
uint32_t mLength;
};
protected:
nsresult SetGlyphsFromSegment(gfxShapedWord *aShapedWord,
gr_segment *aSegment);
gr_face *mGrFace;
gr_font *mGrFont;
CallbackData mCallbackData;
nsDataHashtable<nsUint32HashKey,TableRec> mTables;
// Whether the font implements GetGlyphWidth, or we should read tables
// directly to get ideal widths
bool mUseFontGlyphWidths;
// Convert HTML 'lang' (BCP47) to Graphite language code
static uint32_t GetGraphiteTagForLang(const nsCString& aLang);
static nsTHashtable<nsUint32HashKey> sLanguageTags;
};
#endif /* GFX_GRAPHITESHAPER_H */