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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* 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/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 .
*/
#ifndef INCLUDED_VCL_WIN_SOURCE_GDI_WINLAYOUT_HXX
#define INCLUDED_VCL_WIN_SOURCE_GDI_WINLAYOUT_HXX
#include <rtl/ustring.hxx>
#include <sallayout.hxx>
#include <svsys.h>
#include <win/salgdi.h>
#include <usp10.h>
// Graphite headers
#include <config_graphite.h>
#if ENABLE_GRAPHITE
#include <graphite_layout.hxx>
#endif
class WinFontInstance;
struct VisualItem;
class WinLayout : public SalLayout
{
public:
WinLayout(HDC, const WinFontFace&, WinFontInstance&, bool bUseOpenGL);
virtual ~WinLayout();
virtual void InitFont() const override;
void SetFontScale( float f ) { mfFontScale = f; }
HFONT DisableFontScaling() const;
SCRIPT_CACHE& GetScriptCache() const;
/// In the non-OpenGL case, call the DrawTextImpl directly, otherwise make
/// sure we draw to an interim texture.
virtual void DrawText(SalGraphics&) const override;
/// Draw to the provided HDC.
virtual bool DrawTextImpl(HDC hDC, const Rectangle* pRectToErase, Point* pPos, int* pGetNextGlypInfo) const = 0;
virtual bool CacheGlyphs(SalGraphics& rGraphics) const = 0;
virtual bool DrawCachedGlyphs(SalGraphics& rGraphics) const = 0;
HDC mhDC; // WIN32 device handle
HFONT mhFont; // WIN32 font handle
int mnBaseAdv; // x-offset relative to Layout origin
float mfFontScale; // allows metrics emulation of huge font sizes
bool mbUseOpenGL; ///< We need to render via OpenGL
const WinFontFace& mrWinFontData;
WinFontInstance& mrWinFontEntry;
};
class UniscribeLayout : public WinLayout
{
public:
UniscribeLayout(HDC, const WinFontFace&, WinFontInstance&, bool bUseOpenGL);
virtual bool LayoutText( ImplLayoutArgs& ) override;
virtual void AdjustLayout( ImplLayoutArgs& ) override;
virtual bool DrawTextImpl(HDC hDC, const Rectangle* pRectToErase, Point* pPos, int* pGetNextGlypInfo) const override;
virtual bool CacheGlyphs(SalGraphics& rGraphics) const override;
virtual bool DrawCachedGlyphs(SalGraphics& rGraphics) const override;
virtual int GetNextGlyphs( int nLen, sal_GlyphId* pGlyphs, Point& rPos, int&,
DeviceCoordinate* pGlyphAdvances, int* pCharPosAry,
const PhysicalFontFace** pFallbackFonts = NULL ) const override;
virtual DeviceCoordinate FillDXArray( DeviceCoordinate* pDXArray ) const override;
virtual sal_Int32 GetTextBreak(DeviceCoordinate nMaxWidth, DeviceCoordinate nCharExtra, int nFactor) const override;
virtual void GetCaretPositions( int nArraySize, long* pCaretXArray ) const override;
virtual bool IsKashidaPosValid ( int nCharPos ) const override;
// for glyph+font+script fallback
virtual void MoveGlyph( int nStart, long nNewXPos ) override;
virtual void DropGlyph( int nStart ) override;
virtual void Simplify( bool bIsBase ) override;
virtual void DisableGlyphInjection( bool bDisable ) override { mbDisableGlyphInjection = bDisable; }
protected:
virtual ~UniscribeLayout();
void Justify( DeviceCoordinate nNewWidth );
void ApplyDXArray( const ImplLayoutArgs& );
bool GetItemSubrange( const VisualItem&,
int& rMinIndex, int& rEndIndex ) const;
private:
// item specific info
SCRIPT_ITEM* mpScriptItems; // in logical order
VisualItem* mpVisualItems; // in visual order
int mnItemCount; // number of visual items
// string specific info
// everything is in logical order
OUString msTheString; // Sadly we need it in GetNextGlyphs(), to be able to call GetVerticalFlags()
int mnCharCapacity;
WORD* mpLogClusters; // map from absolute_char_pos to relative_glyph_pos
int* mpCharWidths; // map from absolute_char_pos to char_width
int mnSubStringMin; // char_pos of first char in context
// glyph specific info
// everything is in visual order
int mnGlyphCount;
int mnGlyphCapacity;
int* mpGlyphAdvances; // glyph advance width before justification
int* mpJustifications; // glyph advance width after justification
WORD* mpOutGlyphs; // glyphids in visual order
GOFFSET* mpGlyphOffsets; // glyph offsets to the "naive" layout
SCRIPT_VISATTR* mpVisualAttrs; // glyph visual attributes
mutable int* mpGlyphs2Chars; // map from absolute_glyph_pos to absolute_char_pos
// kashida stuff
void InitKashidaHandling();
void KashidaItemFix( int nMinGlyphPos, int nEndGlyphPos );
bool KashidaWordFix( int nMinGlyphPos, int nEndGlyphPos, int* pnCurrentPos );
int mnMinKashidaWidth;
int mnMinKashidaGlyph;
bool mbDisableGlyphInjection;
bool mbUseGLyphy;
bool DrawCachedGlyphsUsingGLyphy(SalGraphics& rGraphics) const;
bool DrawCachedGlyphsUsingTextures(SalGraphics& rGraphics) const;
};
#if ENABLE_GRAPHITE
class GraphiteLayoutWinImpl : public GraphiteLayout
{
public:
GraphiteLayoutWinImpl(const gr_face * pFace, WinFontInstance & rFont)
throw()
: GraphiteLayout(pFace), mrFont(rFont) {};
virtual ~GraphiteLayoutWinImpl() throw() {};
virtual sal_GlyphId getKashidaGlyph(int & rWidth) override;
private:
WinFontInstance & mrFont;
};
/// This class uses the SIL Graphite engine to provide complex text layout services to the VCL
class GraphiteWinLayout : public WinLayout
{
private:
gr_font * mpFont;
grutils::GrFeatureParser * mpFeatures;
mutable GraphiteLayoutWinImpl maImpl;
public:
GraphiteWinLayout(HDC hDC, const WinFontFace& rWFD, WinFontInstance& rWFE, bool bUseOpenGL) throw();
virtual ~GraphiteWinLayout();
// used by upper layers
virtual bool LayoutText( ImplLayoutArgs& ) override; // first step of layout
virtual void AdjustLayout( ImplLayoutArgs& ) override; // adjusting after fallback etc.
virtual bool DrawTextImpl(HDC hDC, const Rectangle* pRectToErase, Point* pPos, int* pGetNextGlypInfo) const override;
virtual bool CacheGlyphs(SalGraphics& rGraphics) const override;
virtual bool DrawCachedGlyphs(SalGraphics& rGraphics) const override;
// methods using string indexing
virtual sal_Int32 GetTextBreak(DeviceCoordinate nMaxWidth, DeviceCoordinate nCharExtra=0, int nFactor=1) const override;
virtual DeviceCoordinate FillDXArray( DeviceCoordinate* pDXArray ) const override;
virtual void GetCaretPositions( int nArraySize, long* pCaretXArray ) const override;
// methods using glyph indexing
virtual int GetNextGlyphs(int nLen, sal_GlyphId* pGlyphIdxAry, ::Point & rPos, int&,
DeviceCoordinate* pGlyphAdvAry = NULL, int* pCharPosAry = NULL,
const PhysicalFontFace** pFallbackFonts = NULL ) const override;
// used by glyph+font+script fallback
virtual void MoveGlyph( int nStart, long nNewXPos ) override;
virtual void DropGlyph( int nStart ) override;
virtual void Simplify( bool bIsBase ) override;
};
#endif // ENABLE_GRAPHITE
#endif
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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