michael@0: /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef GFX_GRAPHITESHAPER_H
michael@0: #define GFX_GRAPHITESHAPER_H
michael@0: 
michael@0: #include "gfxFont.h"
michael@0: 
michael@0: struct gr_face;
michael@0: struct gr_font;
michael@0: struct gr_segment;
michael@0: 
michael@0: class gfxGraphiteShaper : public gfxFontShaper {
michael@0: public:
michael@0:     gfxGraphiteShaper(gfxFont *aFont);
michael@0:     virtual ~gfxGraphiteShaper();
michael@0: 
michael@0:     virtual bool ShapeText(gfxContext      *aContext,
michael@0:                            const char16_t *aText,
michael@0:                            uint32_t         aOffset,
michael@0:                            uint32_t         aLength,
michael@0:                            int32_t          aScript,
michael@0:                            gfxShapedText   *aShapedText);
michael@0: 
michael@0:     static void Shutdown();
michael@0: 
michael@0: protected:
michael@0:     nsresult SetGlyphsFromSegment(gfxContext      *aContext,
michael@0:                                   gfxShapedText   *aShapedText,
michael@0:                                   uint32_t         aOffset,
michael@0:                                   uint32_t         aLength,
michael@0:                                   const char16_t *aText,
michael@0:                                   gr_segment      *aSegment);
michael@0: 
michael@0:     static float GrGetAdvance(const void* appFontHandle, uint16_t glyphid);
michael@0: 
michael@0:     gr_face *mGrFace; // owned by the font entry; shaper must call
michael@0:                       // gfxFontEntry::ReleaseGrFace when finished with it
michael@0:     gr_font *mGrFont; // owned by the shaper itself
michael@0: 
michael@0:     struct CallbackData {
michael@0:         gfxFont           *mFont;
michael@0:         gfxGraphiteShaper *mShaper;
michael@0:         gfxContext        *mContext;
michael@0:     };
michael@0: 
michael@0:     CallbackData mCallbackData;
michael@0: 
michael@0:     // Convert HTML 'lang' (BCP47) to Graphite language code
michael@0:     static uint32_t GetGraphiteTagForLang(const nsCString& aLang);
michael@0:     static nsTHashtable<nsUint32HashKey> *sLanguageTags;
michael@0: };
michael@0: 
michael@0: #endif /* GFX_GRAPHITESHAPER_H */