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70 lines
2.1 KiB
C++
70 lines
2.1 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef GFX_GRAPHITESHAPER_H
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#define GFX_GRAPHITESHAPER_H
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#include "gfxTypes.h"
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#include "gfxFont.h"
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#include "nsDataHashtable.h"
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#include "nsHashKeys.h"
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struct gr_face;
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struct gr_font;
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struct gr_segment;
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class gfxGraphiteShaper : public gfxFontShaper {
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public:
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gfxGraphiteShaper(gfxFont *aFont);
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virtual ~gfxGraphiteShaper();
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virtual bool ShapeText(gfxContext *aContext,
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const PRUnichar *aText,
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uint32_t aOffset,
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uint32_t aLength,
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int32_t aScript,
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gfxShapedText *aShapedText);
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const void* GetTable(uint32_t aTag, size_t *aLength);
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static void Shutdown();
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struct CallbackData {
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gfxFont *mFont;
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gfxGraphiteShaper *mShaper;
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gfxContext *mContext;
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};
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struct TableRec {
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hb_blob_t *mBlob;
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const void *mData;
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uint32_t mLength;
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};
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protected:
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nsresult SetGlyphsFromSegment(gfxShapedText *aShapedText,
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uint32_t aOffset,
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uint32_t aLength,
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const PRUnichar *aText,
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gr_segment *aSegment);
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gr_face *mGrFace;
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gr_font *mGrFont;
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CallbackData mCallbackData;
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nsDataHashtable<nsUint32HashKey,TableRec> mTables;
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// Whether the font implements GetGlyphWidth, or we should read tables
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// directly to get ideal widths
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bool mUseFontGlyphWidths;
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// Convert HTML 'lang' (BCP47) to Graphite language code
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static uint32_t GetGraphiteTagForLang(const nsCString& aLang);
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static nsTHashtable<nsUint32HashKey> sLanguageTags;
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};
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#endif /* GFX_GRAPHITESHAPER_H */
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