[occt.git] / src / OpenGl / OpenGl_TextFormatter.cxx

// Created on: 2013-01-29
// Created by: Kirill GAVRILOV
// Copyright (c) 2013-2014 OPEN CASCADE SAS
//
// This file is part of Open CASCADE Technology software library.
//
// This library is free software; you can redistribute it and/or modify it under
// the terms of the GNU Lesser General Public License version 2.1 as published
// by the Free Software Foundation, with special exception defined in the file
// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
// distribution for complete text of the license and disclaimer of any warranty.
//
// Alternatively, this file may be used under the terms of Open CASCADE
// commercial license or contractual agreement.

#include <OpenGl_TextFormatter.hxx>

#include <OpenGl_VertexBufferCompat.hxx>

#include <cmath>

namespace
{

  //! Auxiliary function to translate rectangle by the vector.
  inline void move (Font_FTFont::Rect& theRect,
                    const OpenGl_Vec2& theVec)
  {
    theRect.Left   += theVec.x();
    theRect.Right  += theVec.x();
    theRect.Top    += theVec.y();
    theRect.Bottom += theVec.y();
  }

  //! Auxiliary function to translate rectangles by the vector.
  inline void move (NCollection_Vector<OpenGl_Font::Tile>& theRects,
                    const OpenGl_Vec2&                     theMoveVec,
                    Standard_Integer                       theCharLower,
                    const Standard_Integer                 theCharUpper)
  {
    for(; theCharLower <= theCharUpper; ++theCharLower)
    {
      Font_FTFont::Rect& aRect = theRects.ChangeValue (theCharLower).px;
      move (aRect, theMoveVec);
    }
  }

  //! Auxiliary function to translate rectangles in horizontal direction.
  /*inline void moveX (NCollection_Vector<OpenGl_Font::Tile>& theRects,
                     const Standard_ShortReal               theMoveVec,
                     Standard_Integer                       theCharLower,
                     const Standard_Integer                 theCharUpper)
  {
    for (; theCharLower <= theCharUpper; ++theCharLower)
    {
      Font_FTFont::Rect& aRect = theRects.ChangeValue (theCharLower).px;
      aRect.Left  += theMoveVec;
      aRect.Right += theMoveVec;
    }
  }*/

  //! Auxiliary function to translate rectangles in vertical direction.
  inline void moveY (NCollection_Vector<OpenGl_Font::Tile>& theRects,
                     const Standard_ShortReal               theMoveVec,
                     Standard_Integer                       theCharLower,
                     const Standard_Integer                 theCharUpper)
  {
    for(; theCharLower <= theCharUpper; ++theCharLower)
    {
      Font_FTFont::Rect& aRect = theRects.ChangeValue (theCharLower).px;
      aRect.Top    += theMoveVec;
      aRect.Bottom += theMoveVec;
    }
  }

  //! Apply floor to vector components.
  //! @param  theVec - vector to change (by reference!)
  //! @return modified vector
  inline OpenGl_Vec2& floor (OpenGl_Vec2& theVec)
  {
    theVec.x() = std::floor (theVec.x());
    theVec.y() = std::floor (theVec.y());
    return theVec;
  }

};


// =======================================================================
// function : OpenGl_TextFormatter
// purpose  :
// =======================================================================
OpenGl_TextFormatter::OpenGl_TextFormatter()
: myAlignX (Graphic3d_HTA_LEFT),
  myAlignY (Graphic3d_VTA_TOP),
  myTabSize (8),
  //
  myPen (0.0f, 0.0f),
  myRectsNb (0),
  myLineSpacing (0.0f),
  myAscender (0.0f),
  myIsFormatted (false),
  //
  myLinesNb (0),
  myRectLineStart (0),
  myRectWordStart (0),
  myNewLineNb(0),
  myPenCurrLine (0.0f),
  myLineLeft (0.0f),
  myLineTail (0.0f),
  myBndTop   (0.0f),
  myBndWidth (0.0f),
  myMoveVec (0.0f, 0.0f)
{
  //
}

// =======================================================================
// function : SetupAlignment
// purpose  :
// =======================================================================
void OpenGl_TextFormatter::SetupAlignment (const Graphic3d_HorizontalTextAlignment theAlignX,
                                           const Graphic3d_VerticalTextAlignment   theAlignY)
{
  myAlignX = theAlignX;
  myAlignY = theAlignY;
}

// =======================================================================
// function : Reset
// purpose  :
// =======================================================================
void OpenGl_TextFormatter::Reset()
{
  myIsFormatted = false;
  myString.Clear();
  myPen.x() = myPen.y() = 0.0f;
  myRectsNb = 0;
  myLineSpacing = myAscender = 0.0f;
  myRects.Clear();
  myNewLines.Clear();
}

// =======================================================================
// function : Result
// purpose  :
// =======================================================================
void OpenGl_TextFormatter::Result (NCollection_Vector<GLuint>& theTextures,
                                   NCollection_Vector< NCollection_Handle <NCollection_Vector <OpenGl_Vec2> > >& theVertsPerTexture,
                                   NCollection_Vector< NCollection_Handle <NCollection_Vector <OpenGl_Vec2> > >& theTCrdsPerTexture) const
{
  OpenGl_Vec2 aVec (0.0f, 0.0f);
  theTextures.Clear();
  theVertsPerTexture.Clear();
  theTCrdsPerTexture.Clear();
  for (Standard_Integer aRectIter = 0; aRectIter < myRectsNb; ++aRectIter)
  {
    const Font_FTFont::Rect& aRect    = myRects.Value (aRectIter).px;
    const Font_FTFont::Rect& aRectUV  = myRects.Value (aRectIter).uv;
    const GLuint             aTexture = myRects.Value (aRectIter).texture;

    Standard_Integer aListId = 0;
    for (aListId = 0; aListId < theTextures.Length(); ++aListId)
    {
      if (theTextures.Value (aListId) == aTexture)
      {
        break;
      }
    }
    if (aListId >= theTextures.Length())
    {
      theTextures.Append (aTexture);
      theVertsPerTexture.Append (new NCollection_Vector<OpenGl_Vec2>());
      theTCrdsPerTexture.Append (new NCollection_Vector<OpenGl_Vec2>());
    }

    NCollection_Vector<OpenGl_Vec2>& aVerts = *theVertsPerTexture.ChangeValue (aListId);
    NCollection_Vector<OpenGl_Vec2>& aTCrds = *theTCrdsPerTexture.ChangeValue (aListId);

    // apply floor on position to avoid blurring issues
    // due to cross-pixel coordinates
    aVerts.Append (floor(aRect.TopRight   (aVec)));
    aVerts.Append (floor(aRect.TopLeft    (aVec)));
    aVerts.Append (floor(aRect.BottomLeft (aVec)));
    aTCrds.Append (aRectUV.TopRight   (aVec));
    aTCrds.Append (aRectUV.TopLeft    (aVec));
    aTCrds.Append (aRectUV.BottomLeft (aVec));

    aVerts.Append (floor(aRect.BottomRight (aVec)));
    aVerts.Append (floor(aRect.TopRight    (aVec)));
    aVerts.Append (floor(aRect.BottomLeft  (aVec)));
    aTCrds.Append (aRectUV.BottomRight (aVec));
    aTCrds.Append (aRectUV.TopRight    (aVec));
    aTCrds.Append (aRectUV.BottomLeft  (aVec));
  }
}

// =======================================================================
// function : Result
// purpose  :
// =======================================================================
void OpenGl_TextFormatter::Result (const Handle(OpenGl_Context)&                    theCtx,
                                   NCollection_Vector<GLuint>&                      theTextures,
                                   NCollection_Vector<Handle(OpenGl_VertexBuffer)>& theVertsPerTexture,
                                   NCollection_Vector<Handle(OpenGl_VertexBuffer)>& theTCrdsPerTexture) const
{
  NCollection_Vector< NCollection_Handle <NCollection_Vector <OpenGl_Vec2> > > aVertsPerTexture;
  NCollection_Vector< NCollection_Handle <NCollection_Vector <OpenGl_Vec2> > > aTCrdsPerTexture;
  Result (theTextures, aVertsPerTexture, aTCrdsPerTexture);

  if (theVertsPerTexture.Length() != theTextures.Length())
  {
    for (Standard_Integer aTextureIter = 0; aTextureIter < theVertsPerTexture.Length(); ++aTextureIter)
    {
      theVertsPerTexture.Value (aTextureIter)->Release (theCtx.operator->());
      theTCrdsPerTexture.Value (aTextureIter)->Release (theCtx.operator->());
    }
    theVertsPerTexture.Clear();
    theTCrdsPerTexture.Clear();

    const bool isNormalMode = theCtx->ToUseVbo();
    Handle(OpenGl_VertexBuffer) aVertsVbo, aTcrdsVbo;
    while (theVertsPerTexture.Length() < theTextures.Length())
    {
      if (isNormalMode)
      {
        aVertsVbo = new OpenGl_VertexBuffer();
        aTcrdsVbo = new OpenGl_VertexBuffer();
      }
      else
      {
        aVertsVbo = new OpenGl_VertexBufferCompat();
        aTcrdsVbo = new OpenGl_VertexBufferCompat();
      }
      theVertsPerTexture.Append (aVertsVbo);
      theTCrdsPerTexture.Append (aTcrdsVbo);
      aVertsVbo->Create (theCtx);
      aTcrdsVbo->Create (theCtx);
    }
  }

  for (Standard_Integer aTextureIter = 0; aTextureIter < theTextures.Length(); ++aTextureIter)
  {
    const NCollection_Vector<OpenGl_Vec2>& aVerts = *aVertsPerTexture.Value (aTextureIter);
    Handle(OpenGl_VertexBuffer)& aVertsVbo = theVertsPerTexture.ChangeValue (aTextureIter);
    if (!aVertsVbo->Init (theCtx, 2, aVerts.Length(), (GLfloat* )NULL)
     || !myVboEditor.Init (theCtx, aVertsVbo))
    {
      continue;
    }
    for (Standard_Integer aVertIter = 0; aVertIter < aVerts.Length(); ++aVertIter, myVboEditor.Next())
    {
      myVboEditor.Value() = aVerts.Value (aVertIter);
    }
    myVboEditor.Flush();

    const NCollection_Vector<OpenGl_Vec2>& aTCrds = *aTCrdsPerTexture.Value (aTextureIter);
    Handle(OpenGl_VertexBuffer)& aTCrdsVbo = theTCrdsPerTexture.ChangeValue (aTextureIter);
    if (!aTCrdsVbo->Init (theCtx, 2, aVerts.Length(), (GLfloat* )NULL)
     || !myVboEditor.Init (theCtx, aTCrdsVbo))
    {
      continue;
    }
    for (Standard_Integer aVertIter = 0; aVertIter < aVerts.Length(); ++aVertIter, myVboEditor.Next())
    {
      myVboEditor.Value() = aTCrds.Value (aVertIter);
    }
    myVboEditor.Flush();
  }
  myVboEditor.Init (NULL, NULL);
}

// =======================================================================
// function : Append
// purpose  :
// =======================================================================
void OpenGl_TextFormatter::Append (const Handle(OpenGl_Context)& theCtx,
                                   const NCollection_String&     theString,
                                   OpenGl_Font&                  theFont)
{
  if (theString.IsEmpty())
  {
    return;
  }

  myAscender    = Max (myAscender,    theFont.Ascender());
  myLineSpacing = Max (myLineSpacing, theFont.LineSpacing());
  myString     += theString;

  int aSymbolsCounter = 0; // special counter to process tabulation symbols

  // first pass - render all symbols using associated font on single ZERO baseline
  OpenGl_Font::Tile aTile;
  memset (&aTile, 0, sizeof(aTile));
  for (NCollection_Utf8Iter anIter = theString.Iterator(); *anIter != 0;)
  {
    const Standard_Utf32Char aCharThis =   *anIter;
    const Standard_Utf32Char aCharNext = *++anIter;

    if (aCharThis == '\x0D' // CR  (carriage return)
     || aCharThis == '\a'   // BEL (alarm)
     || aCharThis == '\f'   // FF  (form feed) NP (new page)
     || aCharThis == '\b'   // BS  (backspace)
     || aCharThis == '\v')  // VT  (vertical tab)
    {
      continue; // skip unsupported carriage control codes
    }
    else if (aCharThis == '\x0A') // LF (line feed, new line)
    {
      aSymbolsCounter = 0;
      myNewLines.Append (myPen.x());
      continue; // will be processed on second pass
    }
    else if (aCharThis == ' ')
    {
      ++aSymbolsCounter;
      myPen.x() += theFont.AdvanceX (' ', aCharNext);
      continue;
    }
    else if (aCharThis == '\t')
    {
      const Standard_Integer aSpacesNum = (myTabSize - (aSymbolsCounter - 1) % myTabSize);
      myPen.x() += theFont.AdvanceX (' ', aCharNext) * Standard_ShortReal(aSpacesNum);
      aSymbolsCounter += aSpacesNum;
      continue;
    }

    ++aSymbolsCounter;
    theFont.RenderGlyph (theCtx,
                         aCharThis, aCharNext,
                         aTile, myPen);
    myRects.Append (aTile);

    ++myRectsNb;
  }
}

// =======================================================================
// function : newLine
// purpose  :
// =======================================================================
void OpenGl_TextFormatter::newLine (const Standard_Integer theLastRect)
{
  if (myRectLineStart >= myRectsNb)
  {
    ++myLinesNb;
    myPenCurrLine -= myLineSpacing;
    return;
  }

  myMoveVec.y() = myPenCurrLine;
  switch (myAlignX)
  {
    default:
    case Graphic3d_HTA_LEFT:
    {
      myMoveVec.x() = (myNewLineNb > 0) ? -myNewLines.Value (myNewLineNb - 1) : 0.0f;
      break;
    }
    case Graphic3d_HTA_RIGHT:
    {
      myMoveVec.x() = (myNewLineNb < myNewLines.Length())
                    ? -myNewLines.Value (myNewLineNb)
                    : -myPen.x();
      break;
    }
    case Graphic3d_HTA_CENTER:
    {
      const Standard_ShortReal aFrom = (myNewLineNb > 0)
                                     ? myNewLines.Value (myNewLineNb - 1)
                                     : 0.0f;
      const Standard_ShortReal aTo   = (myNewLineNb < myNewLines.Length())
                                     ? myNewLines.Value (myNewLineNb)
                                     : myPen.x();
      myMoveVec.x() = -0.5f * (aFrom + aTo);
      break;
    }
  }

  move (myRects, myMoveVec, myRectLineStart, theLastRect);

  ++myLinesNb;
  myPenCurrLine -= myLineSpacing;
  myRectLineStart = myRectWordStart = theLastRect + 1;
  if (myRectLineStart < myRectsNb)
  {
    myLineLeft = myRects.Value (myRectLineStart).px.Left;
  }
}

// =======================================================================
// function : Format
// purpose  :
// =======================================================================
void OpenGl_TextFormatter::Format()
{
  if (myRectsNb == 0 || myIsFormatted)
  {
    return;
  }

  myIsFormatted = true;
  myLinesNb = myRectLineStart = myRectWordStart = 0;
  myLineLeft   = 0.0f;
  myLineTail   = 0.0f;
  myBndTop     = 0.0f;
  myBndWidth   = 0.0f;
  myMoveVec.x() = myMoveVec.y() = 0.0f;

  // split text into lines and apply horizontal alignment
  myPenCurrLine = -myAscender;
  Standard_Integer aRectIter = 0;
  myNewLineNb = 0;
  for (NCollection_Utf8Iter anIter = myString.Iterator(); *anIter != 0; ++anIter)
  {
    const Standard_Utf32Char aCharThis = *anIter;
    if (aCharThis == '\x0D' // CR  (carriage return)
     || aCharThis == '\a'   // BEL (alarm)
     || aCharThis == '\f'   // FF  (form feed) NP (new page)
     || aCharThis == '\b'   // BS  (backspace)
     || aCharThis == '\v')  // VT  (vertical tab)
    {
      continue; // skip unsupported carriage control codes
    }
    else if (aCharThis == '\x0A') // LF (line feed, new line)
    {
      const Standard_Integer aLastRect = aRectIter - 1; // last rect on current line
      newLine (aLastRect);
      ++myNewLineNb;
      continue;
    }
    else if (aCharThis == ' '
          || aCharThis == '\t')
    {
      myRectWordStart = aRectIter;
      continue;
    }

    Standard_ShortReal aWidth = myRects.Value (aRectIter).px.Right - myLineLeft;
    myBndWidth = Max (myBndWidth, aWidth);

    ++aRectIter;
  }

  // move last line
  newLine (myRectsNb - 1);

  // apply vertical alignment style
  if (myAlignY == Graphic3d_VTA_BOTTOM)
  {
    myBndTop = -myLineSpacing - myPenCurrLine;
    moveY (myRects, myBndTop, 0, myRectsNb - 1);
  }
  else if (myAlignY == Graphic3d_VTA_CENTER)
  {
    myBndTop = 0.5f * (myLineSpacing * Standard_ShortReal(myLinesNb));
    moveY (myRects, myBndTop, 0, myRectsNb - 1);
  }
}
Commit	Line	Data
a174a3c5	1	// Created on: 2013-01-29
a174a3c5	2	// Created by: Kirill GAVRILOV
d5f74e42	3	// Copyright (c) 2013-2014 OPEN CASCADE SAS
a174a3c5	4	//
973c2be1	5	// This file is part of Open CASCADE Technology software library.
a174a3c5	6	//
d5f74e42	7	// This library is free software; you can redistribute it and/or modify it under
d5f74e42	8	// the terms of the GNU Lesser General Public License version 2.1 as published
973c2be1	9	// by the Free Software Foundation, with special exception defined in the file
	10	// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
	11	// distribution for complete text of the license and disclaimer of any warranty.
a174a3c5	12	//
973c2be1	13	// Alternatively, this file may be used under the terms of Open CASCADE
973c2be1	14	// commercial license or contractual agreement.
a174a3c5	15
	16	#include <OpenGl_TextFormatter.hxx>
	17
7d3e64ef	18	#include <OpenGl_VertexBufferCompat.hxx>
a174a3c5	19
	20	#include <cmath>
	21
	22	namespace
	23	{
	24
	25	//! Auxiliary function to translate rectangle by the vector.
	26	inline void move (Font_FTFont::Rect& theRect,
	27	const OpenGl_Vec2& theVec)
	28	{
	29	theRect.Left += theVec.x();
	30	theRect.Right += theVec.x();
	31	theRect.Top += theVec.y();
	32	theRect.Bottom += theVec.y();
	33	}
	34
	35	//! Auxiliary function to translate rectangles by the vector.
	36	inline void move (NCollection_Vector<OpenGl_Font::Tile>& theRects,
	37	const OpenGl_Vec2& theMoveVec,
	38	Standard_Integer theCharLower,
	39	const Standard_Integer theCharUpper)
	40	{
	41	for(; theCharLower <= theCharUpper; ++theCharLower)
	42	{
	43	Font_FTFont::Rect& aRect = theRects.ChangeValue (theCharLower).px;
	44	move (aRect, theMoveVec);
	45	}
	46	}
	47
	48	//! Auxiliary function to translate rectangles in horizontal direction.
30f0ad28	49	/*inline void moveX (NCollection_Vector<OpenGl_Font::Tile>& theRects,
a174a3c5	50	const Standard_ShortReal theMoveVec,
	51	Standard_Integer theCharLower,
	52	const Standard_Integer theCharUpper)
	53	{
	54	for (; theCharLower <= theCharUpper; ++theCharLower)
	55	{
	56	Font_FTFont::Rect& aRect = theRects.ChangeValue (theCharLower).px;
	57	aRect.Left += theMoveVec;
	58	aRect.Right += theMoveVec;
	59	}
30f0ad28	60	}*/
a174a3c5	61
	62	//! Auxiliary function to translate rectangles in vertical direction.
	63	inline void moveY (NCollection_Vector<OpenGl_Font::Tile>& theRects,
	64	const Standard_ShortReal theMoveVec,
	65	Standard_Integer theCharLower,
	66	const Standard_Integer theCharUpper)
	67	{
	68	for(; theCharLower <= theCharUpper; ++theCharLower)
	69	{
	70	Font_FTFont::Rect& aRect = theRects.ChangeValue (theCharLower).px;
	71	aRect.Top += theMoveVec;
	72	aRect.Bottom += theMoveVec;
	73	}
	74	}
	75
	76	//! Apply floor to vector components.
	77	//! @param theVec - vector to change (by reference!)
	78	//! @return modified vector
	79	inline OpenGl_Vec2& floor (OpenGl_Vec2& theVec)
	80	{
	81	theVec.x() = std::floor (theVec.x());
	82	theVec.y() = std::floor (theVec.y());
	83	return theVec;
	84	}
	85
	86	};
	87
a174a3c5	88
	89	// =======================================================================
	90	// function : OpenGl_TextFormatter
	91	// purpose :
	92	// =======================================================================
	93	OpenGl_TextFormatter::OpenGl_TextFormatter()
	94	: myAlignX (Graphic3d_HTA_LEFT),
	95	myAlignY (Graphic3d_VTA_TOP),
	96	myTabSize (8),
	97	//
	98	myPen (0.0f, 0.0f),
	99	myRectsNb (0),
	100	myLineSpacing (0.0f),
	101	myAscender (0.0f),
	102	myIsFormatted (false),
	103	//
	104	myLinesNb (0),
	105	myRectLineStart (0),
	106	myRectWordStart (0),
c24d4017	107	myNewLineNb(0),
a174a3c5	108	myPenCurrLine (0.0f),
	109	myLineLeft (0.0f),
	110	myLineTail (0.0f),
	111	myBndTop (0.0f),
	112	myBndWidth (0.0f),
	113	myMoveVec (0.0f, 0.0f)
	114	{
	115	//
	116	}
	117
	118	// =======================================================================
	119	// function : SetupAlignment
	120	// purpose :
	121	// =======================================================================
	122	void OpenGl_TextFormatter::SetupAlignment (const Graphic3d_HorizontalTextAlignment theAlignX,
	123	const Graphic3d_VerticalTextAlignment theAlignY)
	124	{
	125	myAlignX = theAlignX;
	126	myAlignY = theAlignY;
	127	}
	128
	129	// =======================================================================
	130	// function : Reset
	131	// purpose :
	132	// =======================================================================
	133	void OpenGl_TextFormatter::Reset()
	134	{
	135	myIsFormatted = false;
	136	myString.Clear();
	137	myPen.x() = myPen.y() = 0.0f;
	138	myRectsNb = 0;
	139	myLineSpacing = myAscender = 0.0f;
	140	myRects.Clear();
	141	myNewLines.Clear();
	142	}
	143
	144	// =======================================================================
	145	// function : Result
	146	// purpose :
	147	// =======================================================================
	148	void OpenGl_TextFormatter::Result (NCollection_Vector<GLuint>& theTextures,
	149	NCollection_Vector< NCollection_Handle <NCollection_Vector <OpenGl_Vec2> > >& theVertsPerTexture,
	150	NCollection_Vector< NCollection_Handle <NCollection_Vector <OpenGl_Vec2> > >& theTCrdsPerTexture) const
	151	{
	152	OpenGl_Vec2 aVec (0.0f, 0.0f);
	153	theTextures.Clear();
	154	theVertsPerTexture.Clear();
	155	theTCrdsPerTexture.Clear();
	156	for (Standard_Integer aRectIter = 0; aRectIter < myRectsNb; ++aRectIter)
	157	{
	158	const Font_FTFont::Rect& aRect = myRects.Value (aRectIter).px;
	159	const Font_FTFont::Rect& aRectUV = myRects.Value (aRectIter).uv;
	160	const GLuint aTexture = myRects.Value (aRectIter).texture;
	161
	162	Standard_Integer aListId = 0;
	163	for (aListId = 0; aListId < theTextures.Length(); ++aListId)
	164	{
	165	if (theTextures.Value (aListId) == aTexture)
	166	{
	167	break;
	168	}
	169	}
	170	if (aListId >= theTextures.Length())
	171	{
172	theTextures.Append (aTexture);
173	theVertsPerTexture.Append (new NCollection_Vector<OpenGl_Vec2>());
174	theTCrdsPerTexture.Append (new NCollection_Vector<OpenGl_Vec2>());
175	}
176
177	NCollection_Vector<OpenGl_Vec2>& aVerts = *theVertsPerTexture.ChangeValue (aListId);
178	NCollection_Vector<OpenGl_Vec2>& aTCrds = *theTCrdsPerTexture.ChangeValue (aListId);
179
180	// apply floor on position to avoid blurring issues
181	// due to cross-pixel coordinates
a174a3c5	182	aVerts.Append (floor(aRect.TopRight (aVec)));
348ff753	183	aVerts.Append (floor(aRect.TopLeft (aVec)));
348ff753	184	aVerts.Append (floor(aRect.BottomLeft (aVec)));
a174a3c5	185	aTCrds.Append (aRectUV.TopRight (aVec));
348ff753	186	aTCrds.Append (aRectUV.TopLeft (aVec));
348ff753	187	aTCrds.Append (aRectUV.BottomLeft (aVec));
a174a3c5	188
a174a3c5	189	aVerts.Append (floor(aRect.BottomRight (aVec)));
348ff753	190	aVerts.Append (floor(aRect.TopRight (aVec)));
348ff753	191	aVerts.Append (floor(aRect.BottomLeft (aVec)));
a174a3c5	192	aTCrds.Append (aRectUV.BottomRight (aVec));
348ff753	193	aTCrds.Append (aRectUV.TopRight (aVec));
348ff753	194	aTCrds.Append (aRectUV.BottomLeft (aVec));
a174a3c5	195	}
	196	}
	197
	198	// =======================================================================
	199	// function : Result
	200	// purpose :
	201	// =======================================================================
	202	void OpenGl_TextFormatter::Result (const Handle(OpenGl_Context)& theCtx,
	203	NCollection_Vector<GLuint>& theTextures,
	204	NCollection_Vector<Handle(OpenGl_VertexBuffer)>& theVertsPerTexture,
	205	NCollection_Vector<Handle(OpenGl_VertexBuffer)>& theTCrdsPerTexture) const
	206	{
	207	NCollection_Vector< NCollection_Handle <NCollection_Vector <OpenGl_Vec2> > > aVertsPerTexture;
	208	NCollection_Vector< NCollection_Handle <NCollection_Vector <OpenGl_Vec2> > > aTCrdsPerTexture;
	209	Result (theTextures, aVertsPerTexture, aTCrdsPerTexture);
	210
	211	if (theVertsPerTexture.Length() != theTextures.Length())
	212	{
	213	for (Standard_Integer aTextureIter = 0; aTextureIter < theVertsPerTexture.Length(); ++aTextureIter)
	214	{
	215	theVertsPerTexture.Value (aTextureIter)->Release (theCtx.operator->());
	216	theTCrdsPerTexture.Value (aTextureIter)->Release (theCtx.operator->());
	217	}
	218	theVertsPerTexture.Clear();
	219	theTCrdsPerTexture.Clear();
	220
7d3e64ef	221	const bool isNormalMode = theCtx->ToUseVbo();
7d3e64ef	222	Handle(OpenGl_VertexBuffer) aVertsVbo, aTcrdsVbo;
a174a3c5	223	while (theVertsPerTexture.Length() < theTextures.Length())
a174a3c5	224	{
7d3e64ef	225	if (isNormalMode)
	226	{
	227	aVertsVbo = new OpenGl_VertexBuffer();
	228	aTcrdsVbo = new OpenGl_VertexBuffer();
	229	}
	230	else
	231	{
	232	aVertsVbo = new OpenGl_VertexBufferCompat();
	233	aTcrdsVbo = new OpenGl_VertexBufferCompat();
	234	}
a174a3c5	235	theVertsPerTexture.Append (aVertsVbo);
	236	theTCrdsPerTexture.Append (aTcrdsVbo);
	237	aVertsVbo->Create (theCtx);
	238	aTcrdsVbo->Create (theCtx);
	239	}
	240	}
	241
	242	for (Standard_Integer aTextureIter = 0; aTextureIter < theTextures.Length(); ++aTextureIter)
	243	{
	244	const NCollection_Vector<OpenGl_Vec2>& aVerts = *aVertsPerTexture.Value (aTextureIter);
	245	Handle(OpenGl_VertexBuffer)& aVertsVbo = theVertsPerTexture.ChangeValue (aTextureIter);
	246	if (!aVertsVbo->Init (theCtx, 2, aVerts.Length(), (GLfloat* )NULL)
	247	\|\| !myVboEditor.Init (theCtx, aVertsVbo))
	248	{
	249	continue;
	250	}
	251	for (Standard_Integer aVertIter = 0; aVertIter < aVerts.Length(); ++aVertIter, myVboEditor.Next())
	252	{
	253	myVboEditor.Value() = aVerts.Value (aVertIter);
	254	}
	255	myVboEditor.Flush();
	256
	257	const NCollection_Vector<OpenGl_Vec2>& aTCrds = *aTCrdsPerTexture.Value (aTextureIter);
	258	Handle(OpenGl_VertexBuffer)& aTCrdsVbo = theTCrdsPerTexture.ChangeValue (aTextureIter);
	259	if (!aTCrdsVbo->Init (theCtx, 2, aVerts.Length(), (GLfloat* )NULL)
	260	\|\| !myVboEditor.Init (theCtx, aTCrdsVbo))
	261	{
	262	continue;
	263	}
	264	for (Standard_Integer aVertIter = 0; aVertIter < aVerts.Length(); ++aVertIter, myVboEditor.Next())
	265	{
	266	myVboEditor.Value() = aTCrds.Value (aVertIter);
	267	}
	268	myVboEditor.Flush();
	269	}
	270	myVboEditor.Init (NULL, NULL);
	271	}
	272
a174a3c5	273	// =======================================================================
	274	// function : Append
	275	// purpose :
	276	// =======================================================================
	277	void OpenGl_TextFormatter::Append (const Handle(OpenGl_Context)& theCtx,
	278	const NCollection_String& theString,
	279	OpenGl_Font& theFont)
	280	{
	281	if (theString.IsEmpty())
	282	{
	283	return;
	284	}
	285
	286	myAscender = Max (myAscender, theFont.Ascender());
	287	myLineSpacing = Max (myLineSpacing, theFont.LineSpacing());
	288	myString += theString;
	289
	290	int aSymbolsCounter = 0; // special counter to process tabulation symbols
	291
	292	// first pass - render all symbols using associated font on single ZERO baseline
	293	OpenGl_Font::Tile aTile;
	294	memset (&aTile, 0, sizeof(aTile));
	295	for (NCollection_Utf8Iter anIter = theString.Iterator(); *anIter != 0;)
	296	{
	297	const Standard_Utf32Char aCharThis = *anIter;
	298	const Standard_Utf32Char aCharNext = *++anIter;
	299
	300	if (aCharThis == '\x0D' // CR (carriage return)
	301	\|\| aCharThis == '\a' // BEL (alarm)
	302	\|\| aCharThis == '\f' // FF (form feed) NP (new page)
	303	\|\| aCharThis == '\b' // BS (backspace)
	304	\|\| aCharThis == '\v') // VT (vertical tab)
	305	{
	306	continue; // skip unsupported carriage control codes
	307	}
	308	else if (aCharThis == '\x0A') // LF (line feed, new line)
	309	{
	310	aSymbolsCounter = 0;
	311	myNewLines.Append (myPen.x());
	312	continue; // will be processed on second pass
	313	}
	314	else if (aCharThis == ' ')
	315	{
	316	++aSymbolsCounter;
	317	myPen.x() += theFont.AdvanceX (' ', aCharNext);
	318	continue;
	319	}
	320	else if (aCharThis == '\t')
	321	{
	322	const Standard_Integer aSpacesNum = (myTabSize - (aSymbolsCounter - 1) % myTabSize);
	323	myPen.x() += theFont.AdvanceX (' ', aCharNext) * Standard_ShortReal(aSpacesNum);
	324	aSymbolsCounter += aSpacesNum;
	325	continue;
	326	}
	327
	328	++aSymbolsCounter;
	329	theFont.RenderGlyph (theCtx,
	330	aCharThis, aCharNext,
	331	aTile, myPen);
	332	myRects.Append (aTile);
	333
	334	++myRectsNb;
	335	}
	336	}
337
338	// =======================================================================
339	// function : newLine
340	// purpose :
341	// =======================================================================
342	void OpenGl_TextFormatter::newLine (const Standard_Integer theLastRect)
343	{
344	if (myRectLineStart >= myRectsNb)
345	{
346	++myLinesNb;
347	myPenCurrLine -= myLineSpacing;
348	return;
349	}
350
351	myMoveVec.y() = myPenCurrLine;
352	switch (myAlignX)
353	{
354	default:
355	case Graphic3d_HTA_LEFT:
356	{
357	myMoveVec.x() = (myNewLineNb > 0) ? -myNewLines.Value (myNewLineNb - 1) : 0.0f;
358	break;
359	}
360	case Graphic3d_HTA_RIGHT:
361	{
362	myMoveVec.x() = (myNewLineNb < myNewLines.Length())
363	? -myNewLines.Value (myNewLineNb)
364	: -myPen.x();
365	break;
366	}
367	case Graphic3d_HTA_CENTER:
368	{
369	const Standard_ShortReal aFrom = (myNewLineNb > 0)
370	? myNewLines.Value (myNewLineNb - 1)
371	: 0.0f;
372	const Standard_ShortReal aTo = (myNewLineNb < myNewLines.Length())
373	? myNewLines.Value (myNewLineNb)
374	: myPen.x();
375	myMoveVec.x() = -0.5f * (aFrom + aTo);
376	break;
377	}
378	}
379
380	move (myRects, myMoveVec, myRectLineStart, theLastRect);
381
382	++myLinesNb;
383	myPenCurrLine -= myLineSpacing;
384	myRectLineStart = myRectWordStart = theLastRect + 1;
385	if (myRectLineStart < myRectsNb)
386	{
387	myLineLeft = myRects.Value (myRectLineStart).px.Left;
388	}
389	}
390
391	// =======================================================================
392	// function : Format
393	// purpose :
394	// =======================================================================
395	void OpenGl_TextFormatter::Format()
396	{
397	if (myRectsNb == 0 \|\| myIsFormatted)
398	{
399	return;
400	}
401
402	myIsFormatted = true;
403	myLinesNb = myRectLineStart = myRectWordStart = 0;
404	myLineLeft = 0.0f;
405	myLineTail = 0.0f;
406	myBndTop = 0.0f;
407	myBndWidth = 0.0f;
408	myMoveVec.x() = myMoveVec.y() = 0.0f;
409
410	// split text into lines and apply horizontal alignment
411	myPenCurrLine = -myAscender;
412	Standard_Integer aRectIter = 0;
413	myNewLineNb = 0;
414	for (NCollection_Utf8Iter anIter = myString.Iterator(); *anIter != 0; ++anIter)
415	{
416	const Standard_Utf32Char aCharThis = *anIter;
417	if (aCharThis == '\x0D' // CR (carriage return)
418	\|\| aCharThis == '\a' // BEL (alarm)
419	\|\| aCharThis == '\f' // FF (form feed) NP (new page)
420	\|\| aCharThis == '\b' // BS (backspace)
421	\|\| aCharThis == '\v') // VT (vertical tab)
422	{
423	continue; // skip unsupported carriage control codes
424	}
425	else if (aCharThis == '\x0A') // LF (line feed, new line)
426	{
427	const Standard_Integer aLastRect = aRectIter - 1; // last rect on current line
428	newLine (aLastRect);
429	++myNewLineNb;
430	continue;
431	}
432	else if (aCharThis == ' '
433	\|\| aCharThis == '\t')
434	{
435	myRectWordStart = aRectIter;
436	continue;
437	}
438
439	Standard_ShortReal aWidth = myRects.Value (aRectIter).px.Right - myLineLeft;
440	myBndWidth = Max (myBndWidth, aWidth);
441
442	++aRectIter;
443	}
444
445	// move last line
446	newLine (myRectsNb - 1);
447
448	// apply vertical alignment style
449	if (myAlignY == Graphic3d_VTA_BOTTOM)
450	{
451	myBndTop = -myLineSpacing - myPenCurrLine;
452	moveY (myRects, myBndTop, 0, myRectsNb - 1);
453	}
454	else if (myAlignY == Graphic3d_VTA_CENTER)
455	{
456	myBndTop = 0.5f * (myLineSpacing * Standard_ShortReal(myLinesNb));
457	moveY (myRects, myBndTop, 0, myRectsNb - 1);
458	}
459	}