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317d68c924
for usage without OpenGL. Split OpenGl_TextFormatter into Font_TextFormatter and OpenGl_TextBuilder. Font_TextFormatter can format a text independetly of OpenGl now. OpenGl_TextBuilder generates primitive array required for rendering text using OpenGl_Font instance.
136 lines
4.6 KiB
C++
Executable File
136 lines
4.6 KiB
C++
Executable File
// Created on: 2013-01-29
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// Created by: Kirill GAVRILOV
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// Copyright (c) 2013-2014 OPEN CASCADE SAS
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//
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// This file is part of Open CASCADE Technology software library.
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//
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// This library is free software; you can redistribute it and/or modify it under
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// the terms of the GNU Lesser General Public License version 2.1 as published
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// by the Free Software Foundation, with special exception defined in the file
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// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
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// distribution for complete text of the license and disclaimer of any warranty.
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//
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// Alternatively, this file may be used under the terms of Open CASCADE
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// commercial license or contractual agreement.
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#ifndef Font_TextFormatter_Header
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#define Font_TextFormatter_Header
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#include <Font_FTFont.hxx>
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#include <NCollection_DataMap.hxx>
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#include <NCollection_Vector.hxx>
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//! This class intended to prepare formatted text.
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class Font_TextFormatter
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{
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public:
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//! Default constructor.
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Standard_EXPORT Font_TextFormatter();
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//! Setup alignment style.
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Standard_EXPORT void SetupAlignment (const Graphic3d_HorizontalTextAlignment theAlignX,
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const Graphic3d_VerticalTextAlignment theAlignY);
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//! Reset current progress.
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Standard_EXPORT void Reset();
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//! Render specified text to inner buffer.
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Standard_EXPORT void Append (const NCollection_String& theString,
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Font_FTFont& theFont);
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//! Perform formatting on the buffered text.
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//! Should not be called more than once after initialization!
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Standard_EXPORT void Format();
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//! Returns specific glyph rectangle.
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inline const NCollection_Vec2<Standard_ShortReal>& TopLeft (const Standard_Integer theIndex) const
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{
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return myCorners.Value (theIndex);
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}
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//! Returns current rendering string.
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inline const NCollection_String& String() const
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{
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return myString;
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}
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//! Returns tab size.
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inline Standard_Integer TabSize() const
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{
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return myTabSize;
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}
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//! @return width of formatted text.
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inline Standard_ShortReal ResultWidth() const
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{
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return myBndWidth;
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}
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//! @return height of formatted text.
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inline Standard_ShortReal ResultHeight() const
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{
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return myLineSpacing * Standard_ShortReal(myLinesNb);
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}
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//! @param bounding box.
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inline void BndBox (Font_FTFont::Rect& theBndBox) const
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{
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theBndBox.Left = 0.0f;
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switch (myAlignX)
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{
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default:
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case Graphic3d_HTA_LEFT: theBndBox.Right = myBndWidth; break;
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case Graphic3d_HTA_RIGHT: theBndBox.Right = -myBndWidth; break;
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case Graphic3d_HTA_CENTER:
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{
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theBndBox.Left = -0.5f * myBndWidth;
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theBndBox.Right = 0.5f * myBndWidth;
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break;
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}
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}
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theBndBox.Top = myBndTop;
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theBndBox.Bottom = theBndBox.Top - myLineSpacing * Standard_ShortReal(myLinesNb);
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}
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protected: //! @name class auxiliary methods
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//! Move glyphs on the current line to correct position.
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Standard_EXPORT void newLine (const Standard_Integer theLastRect);
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protected: //! @name configuration
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Graphic3d_HorizontalTextAlignment myAlignX; //!< horizontal alignment style
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Graphic3d_VerticalTextAlignment myAlignY; //!< vertical alignment style
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Standard_Integer myTabSize; //!< horizontal tabulation width (number of space symbols)
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protected: //! @name input data
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NCollection_String myString; //!< currently rendered text
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NCollection_Vec2<Standard_ShortReal>
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myPen; //!< current pen position
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NCollection_Vector < NCollection_Vec2<Standard_ShortReal> >
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myCorners; //!< The top left corners of a formatted rectangles.
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Standard_Integer myRectsNb; //!< rectangles number
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NCollection_Vector<Standard_ShortReal>
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myNewLines; //!< position at LF
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Standard_ShortReal myLineSpacing; //!< line spacing (computed as maximum of all fonts involved in text formatting)
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Standard_ShortReal myAscender; //!<
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bool myIsFormatted; //!< formatting state
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protected: //! @name temporary variables for formatting routines
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Standard_Integer myLinesNb; //!< overall (new)lines number (including splitting by width limit)
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Standard_Integer myRectLineStart; //!< id of first rectangle on the current line
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Standard_Integer myRectWordStart; //!< id of first rectangle in the current word
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Standard_Integer myNewLineNb;
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Standard_ShortReal myPenCurrLine; //!< current baseline position
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Standard_ShortReal myBndTop;
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Standard_ShortReal myBndWidth;
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NCollection_Vec2<Standard_ShortReal>
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myMoveVec; //!< local variable
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};
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#endif // Font_TextFormatter_Header
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