Difference between revisions of "User:Ericb/Sallayout.hxx"

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Latest revision as of 11:26, 25 March 2010

Content description : classes , structures, etc ...

Several classes are pure virtual classes, and will be linked with architecture part (libvclplug_aqua on native port )

Classes defined

- SalLayout
 It contains the results of a text layout
 All text implementations inherit from this class, it is very essential
 SalLayout methods: InitFonts( ), LayoutText( ), AdjustLayout( ),FillDXArray( ) DrawBase() , DrawOffset( ), DrawText( ),GetTextBreak( ),
 GetNextGlyph( ), GetOutLine( ), GetBoundREct( ), IsSpacingGlyph( ), GetCaretPosition( ), GetDrawPosition( ), GetUnitPerPixels( ),
 GetOrientation( ), GetDrawPosition( )
- ImplLayoutArgs
 All the required input to layout a text
 ImplLayoutArgs : various public methods around parameters to provide "Run" methods [FIXME] : not completely sure, needs verification
 SetLayoutWidth( ), SetDXArray( ), SetOrientation( ), ResetPos( ), GetNextPos( ), GetNextRun(), NeedFallback( ) 
 ( three definitions, with two overloaded), PrepareFallback( )  [FIXME] : define fallback properly
 Protected : AddRun( )
 Helper functions often used with ImplLayoutArgs : GetVerticalFlags( ), GetVerticalChar( ), GetMirroredChar( ), GetLocalizedChar( )
- ImplLayoutRuns
 Used for managing text runs (e.g. for BiDi, glyph and script fallback)
 Consists bascically of indices into the string, which are ordered left to right
 ImplLayoutRuns methods: various methods around actions in progress
 Clear( ), AddPos( ), AddRun( ), IsEmpty( ), ResetPos( ), NextRun( ), GetRun( ), GetNextPos( ), PosIsInRun( )
- Generic SalLayout
 a container for the results of a layout engine
 used when no specialized container for the layout result is available
 (e.g. java's TextLayout object or carbon's ATSU layout are specialized)
- MultiSalLyout
 a container for multiple SalLayouts which is used for glyph fallback,
 it allows mixing of layouts for different fonts and font technologies.
Corresponding implementation :  sallayout.cxx

Includes from STLport : list, vector

Other includes : tools.h , dllapi.h

Class SalGraphics

Class ImplFonData

Class B2DBPolyPolygon

Layout options (completed)

Class ImplLayoutRuns

class ImplLayoutArgs

Glyphs flags

class SalLayout

class MultiSalLayout : inherits of SalLayout

Structure GlyphItem

class GenericSalLayout : inherits of SalLayout

Helper functions (used with ImplLayoutArgs


Sources using this header in vcl

One main file for font services in OpenOffice.org, this header is mainly used in vcl :

./salatslayout.cxx:#include <sallayout.hxx>

./source/gdi/outdev.cxx:#include <sallayout.hxx>

./source/gdi/outdev2.cxx:#include <sallayout.hxx>

./source/gdi/outdev3.cxx:#include <sallayout.hxx>

./source/gdi/pdfwriter_impl.cxx:#include <sallayout.hxx>

./source/gdi/print2.cxx:#include <sallayout.hxx>

./source/gdi/salgdilayout.cxx:#include <sallayout.hxx>

./source/gdi/sallayout.cxx:#include <sallayout.hxx>

./source/glyphs/gcach_layout.cxx:#include <sallayout.hxx>

./unx/inc/pspgraphics.h:#include <sallayout.hxx>

./unx/inc/xfont.hxx:#include <sallayout.hxx>

./unx/source/window/salframe.cxx:#include <sallayout.hxx>

./win/inc/salgdi.h:#include <sallayout.hxx>

Windows specific :

./win/source/gdi/salgdi3.cxx:#include <sallayout.hxx>

./win/source/gdi/winlayout.cxx:#include <sallayout.hxx>

./win/source/window/salframe.cxx:#include <sallayout.hxx>

./source/window/window.cxx:#include <sallayout.hxx>

Several approaches are necessary :

To be implemented

-> same implementation in vcl/aqua directories

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