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

// Copyright (c) 1999-2012 OPEN CASCADE SAS
//
// The content of this file is subject to the Open CASCADE Technology Public
// License Version 6.5 (the "License"). You may not use the content of this file
// except in compliance with the License. Please obtain a copy of the License
// at http://www.opencascade.org and read it completely before using this file.
//
// The Initial Developer of the Original Code is Open CASCADE S.A.S., having its
// main offices at: 1, place des Freres Montgolfier, 78280 Guyancourt, France.
//
// The Original Code and all software distributed under the License is
// distributed on an "AS IS" basis, without warranty of any kind, and the
// Initial Developer hereby disclaims all such warranties, including without
// limitation, any warranties of merchantability, fitness for a particular
// purpose or non-infringement. Please see the License for the specific terms
// and conditions governing the rights and limitations under the License.

#include <OpenGl_FontMgr.hxx>

#include <FTGLTextureFont.h>        
#include <FTLibrary.h>
#include <FTFace.h>
#include <Standard_Stream.hxx>

#undef TRACE

#define DEFAULT_FONT_HEIGHT 16

float h_scale = 0;

void dump_texture( int id);

class Font_DataMap:
  public NCollection_DataMap< Handle(TCollection_HAsciiString),
  Handle(TCollection_HAsciiString)>
{
public:
  inline Font_DataMap
    (const Standard_Integer NbBuckets = 1,
    const Handle(NCollection_BaseAllocator)& theAllocator = 0L)
    :  NCollection_DataMap<Handle(TCollection_HAsciiString),
    Handle(TCollection_HAsciiString)> (NbBuckets, theAllocator)
  {}

  inline Font_DataMap (const Font_DataMap& theOther)
    :  NCollection_DataMap<Handle(TCollection_HAsciiString),
    Handle(TCollection_HAsciiString)> (theOther)
  {}  
  friend Standard_Boolean IsEqual( const Handle(TCollection_HAsciiString)& h1,
    const Handle(TCollection_HAsciiString)& h2 );
};
inline Standard_Boolean
IsEqual( const Handle(TCollection_HAsciiString)& h1,
        const Handle(TCollection_HAsciiString)& h2 )
{
  return (!h1->IsLess(h2) && !h1->IsGreater(h2));
}

OpenGl_FontMgr::OpenGl_FontMgr()
: _CurrentFontId(-1),
_XCurrentScale(1.f),
_YCurrentScale(1.f) 
{
}

OpenGl_FontMgr* OpenGl_FontMgr::instance() 
{
  static OpenGl_FontMgr* _mgr = NULL;
  if ( _mgr == NULL )
  {
    _mgr = new OpenGl_FontMgr();
    _mgr->_initializeFontDB();
  }
  return _mgr;
}

void OpenGl_FontMgr::_initializeFontDB()
{
  Handle(OSD_FontMgr) fntMgr = OSD_FontMgr::GetInstance();
  if ( !fntMgr.IsNull() ) {

    OSD_NListOfSystemFont fontList = fntMgr->GetAvalableFonts();
    if ( fontList.Size() != 0 ) {

      OSD_NListOfSystemFont::Iterator it(fontList);
      for ( ; it.More(); it.Next() ) {
        OGLFont_SysInfo* info = new OGLFont_SysInfo();
        if ( it.Value()->FontAspect() == OSD_FA_Regular ) {
          //this workaround for fonts with names dependent on system locale.
          //for example: "Times New Roman Fett Kursive" or "Times New Roman Gras Italiqui"
          FTFace face(it.Value()->FontPath()->ToCString());
              
          if ( face.Error() == FT_Err_Ok ) {
            if ( (*face.Face())->style_flags == 0 ) {
              info->SysFont = it.Value();
            }
            else {
              //new aspect detected for current font item
#ifdef TRACE
              cout << "TKOpenGl::initializeFontDB() detected new font!\n"
                << "\tFont Previous Name: " << it.Value()->FontName()->ToCString() << endl
                << "\tFont New Name: " << (*face.Face())->family_name << endl
                << "\tFont Aspect: " << (*face.Face())->style_flags << endl;
#endif
              OSD_FontAspect aspect = OSD_FA_Regular;
              if ( (*face.Face())->style_flags == (FT_STYLE_FLAG_ITALIC | FT_STYLE_FLAG_BOLD) )
                aspect = OSD_FA_BoldItalic;
              else if ( (*face.Face())->style_flags == FT_STYLE_FLAG_ITALIC )
                aspect = OSD_FA_Italic;
              else if ( (*face.Face())->style_flags == FT_STYLE_FLAG_BOLD )
                aspect = OSD_FA_Bold;

#ifdef TRACE
              cout << "\tOSD_FontAspect: " << aspect << endl;
#endif
              Handle(TCollection_HAsciiString) aFontName =
                new TCollection_HAsciiString( (*face.Face())->family_name );
              info->SysFont = new OSD_SystemFont( aFontName, aspect, it.Value()->FontPath() );
            }
          }
          else
            continue;
        } else {
          info->SysFont = it.Value();
        }
        _FontDB.Append(info);

      }
    }
  }

#ifdef TRACE
  if ( !_FontDB.Size() ) {
    cout << "\nTKOpenGl::initializeFontDB() FAILED!!!\n"
      << "No fonts detected in the system!\n"
      << "Text rendering in 3D viewer will not be available." << endl;
  }
#endif    
}

bool OpenGl_FontMgr::requestFontList( Graphic3d_NListOfHAsciiString& lst)
{
  FontDBIt DBit(_FontDB);
  lst.Clear();
  for ( ; DBit.More(); DBit.Next() ) {
    lst.Append( DBit.Value()->SysFont->FontName() );
  }
  return true;
}

// Empty fontName means that ANY family name can be used.
// fontAspect == OSD_FA_Undefined means ANY font aspect is acceptable.
// fontheight == -1 means ANY font height is acceptable.
int OpenGl_FontMgr::request_font( const Handle(TCollection_HAsciiString)& fontName,
                                 const OSD_FontAspect                    fontAspect,
                                 const Standard_Integer                  fontHeight )
{
  Standard_Integer aFontHeight = fontHeight;
  if ( aFontHeight < 2 && aFontHeight != -1 )
  {
#ifdef TRACE
    cout << "TKOpenGl::request_font\n"
      << "  Error: font height is invalid!!!\n"
      << "  font height:" << aFontHeight << "\n";
#endif //TRACE
    return -1;
  } 

#ifdef TRACE
  cout << "TKOpenGl::request_font\n"
    << "  font name: " << fontName->ToCString() << endl
    << "  font aspect: " << fontAspect << endl
    << "  font height: " << aFontHeight << endl;
#endif

  GLCONTEXT ctx = GET_GL_CONTEXT();

  //check for font 
  FontDBIt DBit(_FontDB);

#ifdef TRACE
  cout << "Searching font in font database...\n";
#endif

  for ( ; DBit.More(); DBit.Next() ) {
    // san (23.07.2010): comparing font names in case-insensitive mode,
    // as on SUN and SGI system font names are in lower-case
    if ( fontName->IsEmpty() || DBit.Value()->SysFont->FontName()->IsSameString(fontName, Standard_False) ) {
#ifdef TRACE
      cout << "\tName is found...\n\tCheking aspect...\n";
#endif

      //check for font aspect
      if (fontAspect != OSD_FA_Undefined && DBit.Value()->SysFont->FontAspect() != fontAspect) {
#ifdef TRACE
        cout << "\tAspect of candidate font: " << DBit.Value()->SysFont->FontAspect() << endl;
        cout << "\tAspects are not equal! Continue seaching...\n";
#endif
        continue;
      }

#ifdef TRACE
      cout << "\tAspect is found...\n\tCheking height...\n";
#endif
      //check for fixed height
      if (DBit.Value()->SysFont->FontHeight() != -1) {
#ifdef TRACE
        cout << "\tChecking fixed height: " << DBit.Value()->SysFont->FontHeight() << endl;
#endif
        //fixed height font
        if ( aFontHeight != -1 && DBit.Value()->SysFont->FontHeight() != aFontHeight ){
#ifdef TRACE
          cout << "\tHeights are not equal! Continue seaching...\n";
#endif
          continue;
        }
        else
        {
          // We need to remember the font height to be used
          if ( aFontHeight == -1 )
            aFontHeight = DBit.Value()->SysFont->FontHeight();
#ifdef TRACE
          cout << "\tHeight is found\n";
#endif    
        }
      }
      else 
      {
        // If font height is not specified -> use DEFAULT_FONT_HEIGHT for variable-height fonts
        if ( aFontHeight == -1 )
            aFontHeight = DEFAULT_FONT_HEIGHT;
#ifdef TRACE
        cout << "\tFont has variable height == -1. height is found\n";
#endif
      }
#ifdef TRACE
      cout << "\tChecking font manager cache...\n";
#endif  
      //check in loaded fonts
      IDList::Iterator fIt(DBit.Value()->GeneratedFonts);
      for ( ; fIt.More(); fIt.Next() ) {
        OGLFont_Cache cache = _FontCache.Find( fIt.Value() );
        if ( cache.FontHeight == aFontHeight && cache.GlContext == ctx ) {
          //requested font is generated already

#ifdef TRACE
          cout << "\tRequested font is generated already\n\tId = "  ;
          cout << fIt.Value() << endl;
#endif                                                    
          _CurrentFontId = fIt.Value();
          return _CurrentFontId;
        } else {
#ifdef TRACE
          cout << "\t\tHeights or contexts are not equal:\n"
            << "\t\t\tfont height: "  << aFontHeight << "\tchache height: " << cache.FontHeight << endl
            << "\t\t\tfont context: " << ctx << "\tchache context: " << cache.GlContext << endl;
          cout << "\t\tContinue searching in cache...\n";
#endif
        }
      }
#ifdef TRACE
      cout << "\tRequested font is not found among genarated fonts.\n\tCreating new...\n";
#endif
      //if not found in generated fonts
      //create new
      FTGLTextureFont* font = new FTGLTextureFont(DBit.Value()->SysFont->FontPath()->ToCString());
      //by default creates regular font
      if ( ! font || font->Error() != FT_Err_Ok) {
#ifdef TRACE
        cout << "\t\tError during creation FTGL font object!\n";
#endif
        return -1;
      }

      if ( ! font->FaceSize( aFontHeight) || font->Error() != FT_Err_Ok ){
#ifdef TRACE
        cout << "\t\tError during setup FTGL font height!\n";
#endif
        return -1;
      }
      font->UseDisplayList( false );

      //put font to cache
      OGLFont_Cache cache;
      cache.Font = font;
      cache.FontHeight = aFontHeight;     
      cache.GlContext = ctx;

      _CurrentFontId =_FontCache.Size() + 1;
      _FontCache.Bind( _CurrentFontId, cache );
      DBit.Value()->GeneratedFonts.Append(_CurrentFontId);

#ifdef TRACE
      cout << "TKOpenGl::Loaded New FTGL font:\n"
        << "  font name: " << fontName->ToCString() << "\n"
        << "  font aspect: ";

      switch( fontAspect ) 
      {
      case OSD_FA_Bold:
        cout << "OSD_FA_Bold\n";
        break;
      case OSD_FA_BoldItalic:
        cout << "OSD_FA_BoldItalic\n";
        break;
      case OSD_FA_Italic:
        cout << "OSD_FA_Italic\n";
        break;
      case OSD_FA_Regular:
        cout << "OSD_FA_Regular\n";
        break;
      default:
        cout << "OSD_FA_Undefined\n";
        break;
      }
      cout  << "  font height: "<<aFontHeight<<"\n";
      cout << "  font id: " << _CurrentFontId << "\n";
#endif

      return _CurrentFontId;
    }
  }
  //invalid family name
#ifdef TRACE
  cout << "\n---Invalid Family Name!!!---\n";
#endif
  return -1;
}

void OpenGl_FontMgr::render_text( const Standard_Integer id, const wchar_t* text,
                                  const Standard_Boolean is2d )
{
#ifdef TRACE
  cout << "TKOpenGl::render_text\n"
    << "\tfont id = " << id << endl
    << "\ttext = " << text << endl;
#endif
  if ( text && _FontCache.IsBound( id ) ) {
    glMatrixMode( GL_MODELVIEW );
    glPushMatrix();

    glScalef( _XCurrentScale, _YCurrentScale, 1 );
    glPushAttrib( GL_ENABLE_BIT );

    GLboolean enableTexture = glIsEnabled(GL_TEXTURE_2D);
    GLboolean enableDepthTest = glIsEnabled(GL_DEPTH_TEST);

    if( !enableTexture )
      glEnable(GL_TEXTURE_2D);
    if ( !is2d ) {
      if ( !enableDepthTest )
        glEnable(GL_DEPTH_TEST);
    }
    else if ( enableDepthTest ) {
        glDisable(GL_DEPTH_TEST);
    }

    GLint param;
    glGetTexEnviv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, &param);

    glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE); 
    glAlphaFunc(GL_GEQUAL, 0.285f);    
    glEnable(GL_ALPHA_TEST);   
    OGLFont_Cache cache = _FontCache.Find( id );
    cache.Font->Render( text );

    glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, param);

    if( !enableTexture )
      glDisable(GL_TEXTURE_2D);
    if( !enableDepthTest )
      glDisable(GL_DEPTH_TEST);

    glPopAttrib();
    glMatrixMode( GL_MODELVIEW );
    glPopMatrix();
  }

}

void OpenGl_FontMgr::render_text ( const wchar_t* text, const Standard_Boolean is2d )
{
  render_text( _CurrentFontId, text, is2d );
}

const FTFont* OpenGl_FontMgr::fontById (const Standard_Integer id)
{
  return _FontCache.IsBound( id ) ? _FontCache.Find( id ).Font: NULL;
}

Standard_ShortReal OpenGl_FontMgr::computeWidth( const Standard_Integer id, const wchar_t* text )
{
  if( !_FontCache.IsBound( id ) )
    return 0.f;

  OGLFont_Cache cache = _FontCache.Find( id );

  Standard_ShortReal w = cache.Font->Advance( text );

  return w;
}

void OpenGl_FontMgr::setCurrentScale (const Standard_ShortReal xScale,
                                      const Standard_ShortReal yScale)
{
  _XCurrentScale = xScale;
  _YCurrentScale = yScale;
}

#include <AlienImage_BMPAlienData.hxx>
#include <OSD_File.hxx>
#include <OSD_Protection.hxx>
#include <Aspect_GenericColorMap.hxx>
#include <Image_ColorImage.hxx>
#include <Quantity_Color.hxx>

void dump_texture( int id)
{
  Handle(AlienImage_BMPAlienData) image = new AlienImage_BMPAlienData();

  if (!glIsTexture(id))
    return;

  unsigned char* pixels = new unsigned char[8192*1024];
  memset( pixels, 0, 8192*1024 );
  static int index = 0;
  index++;

  glBindTexture(GL_TEXTURE_2D, id );
  glGetTexImage( GL_TEXTURE_2D , 
    0,
    GL_ALPHA,
    GL_UNSIGNED_BYTE,
    pixels );

  Handle(Image_ColorImage) anImage = new Image_ColorImage( 0, 0, 1024, 8192 );

  Aspect_ColorPixel mark( Quantity_Color (0.,0.5,1., Quantity_TOC_RGB ) ),
    space( Quantity_Color (1.,1.,1., Quantity_TOC_RGB ) );

  for( int i = 0; i < 1024; i++ ) {
    for (int j = 0; j < 8192; j++ )
      if (pixels[i*8192+j]>0) {
        anImage->SetPixel( anImage->LowerX()+i, 
          anImage->LowerY()+j,
          mark );
      }
      else {
        anImage->SetPixel( anImage->LowerX()+i, 
          anImage->LowerY()+j,
          space );
      }
  }

  image->FromImage( anImage );
  TCollection_AsciiString name( index );
  name.Prepend( "D:\\Temp_image" );
  name += ".bmp";
  OSD_File file ( name );
  file.Build( OSD_WriteOnly, OSD_Protection());
  image->Write(file);
  file.Close();
  delete []pixels;
}
Commit	Line	Data
b311480e	1	// Copyright (c) 1999-2012 OPEN CASCADE SAS
	2	//
	3	// The content of this file is subject to the Open CASCADE Technology Public
	4	// License Version 6.5 (the "License"). You may not use the content of this file
	5	// except in compliance with the License. Please obtain a copy of the License
	6	// at http://www.opencascade.org and read it completely before using this file.
	7	//
	8	// The Initial Developer of the Original Code is Open CASCADE S.A.S., having its
	9	// main offices at: 1, place des Freres Montgolfier, 78280 Guyancourt, France.
	10	//
	11	// The Original Code and all software distributed under the License is
	12	// distributed on an "AS IS" basis, without warranty of any kind, and the
	13	// Initial Developer hereby disclaims all such warranties, including without
	14	// limitation, any warranties of merchantability, fitness for a particular
	15	// purpose or non-infringement. Please see the License for the specific terms
	16	// and conditions governing the rights and limitations under the License.
	17
7fd59977	18	#include <OpenGl_FontMgr.hxx>
	19
	20	#include <FTGLTextureFont.h>
	21	#include <FTLibrary.h>
	22	#include <FTFace.h>
	23	#include <Standard_Stream.hxx>
	24
	25	#undef TRACE
	26
	27	#define DEFAULT_FONT_HEIGHT 16
	28
	29	float h_scale = 0;
	30
	31	void dump_texture( int id);
	32
	33	class Font_DataMap:
	34	public NCollection_DataMap< Handle(TCollection_HAsciiString),
	35	Handle(TCollection_HAsciiString)>
	36	{
	37	public:
	38	inline Font_DataMap
	39	(const Standard_Integer NbBuckets = 1,
	40	const Handle(NCollection_BaseAllocator)& theAllocator = 0L)
	41	: NCollection_DataMap<Handle(TCollection_HAsciiString),
	42	Handle(TCollection_HAsciiString)> (NbBuckets, theAllocator)
	43	{}
	44
	45	inline Font_DataMap (const Font_DataMap& theOther)
	46	: NCollection_DataMap<Handle(TCollection_HAsciiString),
	47	Handle(TCollection_HAsciiString)> (theOther)
	48	{}
	49	friend Standard_Boolean IsEqual( const Handle(TCollection_HAsciiString)& h1,
	50	const Handle(TCollection_HAsciiString)& h2 );
	51	};
	52	inline Standard_Boolean
	53	IsEqual( const Handle(TCollection_HAsciiString)& h1,
	54	const Handle(TCollection_HAsciiString)& h2 )
	55	{
	56	return (!h1->IsLess(h2) && !h1->IsGreater(h2));
	57	}
	58
	59	OpenGl_FontMgr::OpenGl_FontMgr()
	60	: _CurrentFontId(-1),
	61	_XCurrentScale(1.f),
	62	_YCurrentScale(1.f)
	63	{
	64	}
	65
	66	OpenGl_FontMgr* OpenGl_FontMgr::instance()
	67	{
	68	static OpenGl_FontMgr* _mgr = NULL;
	69	if ( _mgr == NULL )
	70	{
	71	_mgr = new OpenGl_FontMgr();
	72	_mgr->_initializeFontDB();
	73	}
	74	return _mgr;
	75	}
	76
	77	void OpenGl_FontMgr::_initializeFontDB()
	78	{
	79	Handle(OSD_FontMgr) fntMgr = OSD_FontMgr::GetInstance();
	80	if ( !fntMgr.IsNull() ) {
	81
82	OSD_NListOfSystemFont fontList = fntMgr->GetAvalableFonts();
83	if ( fontList.Size() != 0 ) {
84
85	OSD_NListOfSystemFont::Iterator it(fontList);
86	for ( ; it.More(); it.Next() ) {
87	OGLFont_SysInfo* info = new OGLFont_SysInfo();
88	if ( it.Value()->FontAspect() == OSD_FA_Regular ) {
89	//this workaround for fonts with names dependent on system locale.
90	//for example: "Times New Roman Fett Kursive" or "Times New Roman Gras Italiqui"
91	FTFace face(it.Value()->FontPath()->ToCString());
92
93	if ( face.Error() == FT_Err_Ok ) {
94	if ( (*face.Face())->style_flags == 0 ) {
95	info->SysFont = it.Value();
96	}
97	else {
98	//new aspect detected for current font item
99	#ifdef TRACE
100	cout << "TKOpenGl::initializeFontDB() detected new font!\n"
101	<< "\tFont Previous Name: " << it.Value()->FontName()->ToCString() << endl
102	<< "\tFont New Name: " << (*face.Face())->family_name << endl
103	<< "\tFont Aspect: " << (*face.Face())->style_flags << endl;
104	#endif
105	OSD_FontAspect aspect = OSD_FA_Regular;
106	if ( (*face.Face())->style_flags == (FT_STYLE_FLAG_ITALIC \| FT_STYLE_FLAG_BOLD) )
107	aspect = OSD_FA_BoldItalic;
108	else if ( (*face.Face())->style_flags == FT_STYLE_FLAG_ITALIC )
109	aspect = OSD_FA_Italic;
110	else if ( (*face.Face())->style_flags == FT_STYLE_FLAG_BOLD )
111	aspect = OSD_FA_Bold;
112
113	#ifdef TRACE
114	cout << "\tOSD_FontAspect: " << aspect << endl;
115	#endif
116	Handle(TCollection_HAsciiString) aFontName =
117	new TCollection_HAsciiString( (*face.Face())->family_name );
118	info->SysFont = new OSD_SystemFont( aFontName, aspect, it.Value()->FontPath() );
119	}
120	}
121	else
122	continue;
123	} else {
124	info->SysFont = it.Value();
125	}
126	_FontDB.Append(info);
127
128	}
129	}
130	}
131
132	#ifdef TRACE
133	if ( !_FontDB.Size() ) {
134	cout << "\nTKOpenGl::initializeFontDB() FAILED!!!\n"
135	<< "No fonts detected in the system!\n"
136	<< "Text rendering in 3D viewer will not be available." << endl;
137	}
138	#endif
139	}
140
141	bool OpenGl_FontMgr::requestFontList( Graphic3d_NListOfHAsciiString& lst)
142	{
143	FontDBIt DBit(_FontDB);
144	lst.Clear();
145	for ( ; DBit.More(); DBit.Next() ) {
146	lst.Append( DBit.Value()->SysFont->FontName() );
147	}
148	return true;
149	}
150
151	// Empty fontName means that ANY family name can be used.
152	// fontAspect == OSD_FA_Undefined means ANY font aspect is acceptable.
153	// fontheight == -1 means ANY font height is acceptable.
154	int OpenGl_FontMgr::request_font( const Handle(TCollection_HAsciiString)& fontName,
155	const OSD_FontAspect fontAspect,
156	const Standard_Integer fontHeight )
157	{
158	Standard_Integer aFontHeight = fontHeight;
159	if ( aFontHeight < 2 && aFontHeight != -1 )
160	{
161	#ifdef TRACE
162	cout << "TKOpenGl::request_font\n"
163	<< " Error: font height is invalid!!!\n"
164	<< " font height:" << aFontHeight << "\n";
165	#endif //TRACE
166	return -1;
167	}
168
169	#ifdef TRACE
170	cout << "TKOpenGl::request_font\n"
171	<< " font name: " << fontName->ToCString() << endl
172	<< " font aspect: " << fontAspect << endl
173	<< " font height: " << aFontHeight << endl;
174	#endif
175
176	GLCONTEXT ctx = GET_GL_CONTEXT();
177
178	//check for font
179	FontDBIt DBit(_FontDB);
180
181	#ifdef TRACE
182	cout << "Searching font in font database...\n";
183	#endif
184
185	for ( ; DBit.More(); DBit.Next() ) {
186	// san (23.07.2010): comparing font names in case-insensitive mode,
187	// as on SUN and SGI system font names are in lower-case
188	if ( fontName->IsEmpty() \|\| DBit.Value()->SysFont->FontName()->IsSameString(fontName, Standard_False) ) {
189	#ifdef TRACE
190	cout << "\tName is found...\n\tCheking aspect...\n";
191	#endif
192
193	//check for font aspect
194	if (fontAspect != OSD_FA_Undefined && DBit.Value()->SysFont->FontAspect() != fontAspect) {
195	#ifdef TRACE
196	cout << "\tAspect of candidate font: " << DBit.Value()->SysFont->FontAspect() << endl;
197	cout << "\tAspects are not equal! Continue seaching...\n";
198	#endif
199	continue;
200	}
201
202	#ifdef TRACE
203	cout << "\tAspect is found...\n\tCheking height...\n";
204	#endif
205	//check for fixed height
206	if (DBit.Value()->SysFont->FontHeight() != -1) {
207	#ifdef TRACE
208	cout << "\tChecking fixed height: " << DBit.Value()->SysFont->FontHeight() << endl;
209	#endif
210	//fixed height font
211	if ( aFontHeight != -1 && DBit.Value()->SysFont->FontHeight() != aFontHeight ){
212	#ifdef TRACE
213	cout << "\tHeights are not equal! Continue seaching...\n";
214	#endif
215	continue;
216	}
217	else
218	{
219	// We need to remember the font height to be used
220	if ( aFontHeight == -1 )
221	aFontHeight = DBit.Value()->SysFont->FontHeight();
222	#ifdef TRACE
223	cout << "\tHeight is found\n";
224	#endif
225	}
226	}
227	else
228	{
229	// If font height is not specified -> use DEFAULT_FONT_HEIGHT for variable-height fonts
230	if ( aFontHeight == -1 )
231	aFontHeight = DEFAULT_FONT_HEIGHT;
232	#ifdef TRACE
233	cout << "\tFont has variable height == -1. height is found\n";
234	#endif
235	}
236	#ifdef TRACE
237	cout << "\tChecking font manager cache...\n";
238	#endif
239	//check in loaded fonts
240	IDList::Iterator fIt(DBit.Value()->GeneratedFonts);
241	for ( ; fIt.More(); fIt.Next() ) {
242	OGLFont_Cache cache = _FontCache.Find( fIt.Value() );
243	if ( cache.FontHeight == aFontHeight && cache.GlContext == ctx ) {
244	//requested font is generated already
245
246	#ifdef TRACE
247	cout << "\tRequested font is generated already\n\tId = " ;
248	cout << fIt.Value() << endl;
249	#endif
250	_CurrentFontId = fIt.Value();
251	return _CurrentFontId;
252	} else {
253	#ifdef TRACE
254	cout << "\t\tHeights or contexts are not equal:\n"
255	<< "\t\t\tfont height: " << aFontHeight << "\tchache height: " << cache.FontHeight << endl
256	<< "\t\t\tfont context: " << ctx << "\tchache context: " << cache.GlContext << endl;
257	cout << "\t\tContinue searching in cache...\n";
258	#endif
259	}
260	}
261	#ifdef TRACE
262	cout << "\tRequested font is not found among genarated fonts.\n\tCreating new...\n";
263	#endif
264	//if not found in generated fonts
265	//create new
266	FTGLTextureFont* font = new FTGLTextureFont(DBit.Value()->SysFont->FontPath()->ToCString());
267	//by default creates regular font
268	if ( ! font \|\| font->Error() != FT_Err_Ok) {
269	#ifdef TRACE
270	cout << "\t\tError during creation FTGL font object!\n";
271	#endif
272	return -1;
273	}
274
275	if ( ! font->FaceSize( aFontHeight) \|\| font->Error() != FT_Err_Ok ){
276	#ifdef TRACE
277	cout << "\t\tError during setup FTGL font height!\n";
278	#endif
279	return -1;
280	}
281	font->UseDisplayList( false );
282
283	//put font to cache
284	OGLFont_Cache cache;
285	cache.Font = font;
286	cache.FontHeight = aFontHeight;
287	cache.GlContext = ctx;
288
289	_CurrentFontId =_FontCache.Size() + 1;
290	_FontCache.Bind( _CurrentFontId, cache );
291	DBit.Value()->GeneratedFonts.Append(_CurrentFontId);
292
293	#ifdef TRACE
294	cout << "TKOpenGl::Loaded New FTGL font:\n"
295	<< " font name: " << fontName->ToCString() << "\n"
296	<< " font aspect: ";
297
298	switch( fontAspect )
299	{
300	case OSD_FA_Bold:
301	cout << "OSD_FA_Bold\n";
302	break;
303	case OSD_FA_BoldItalic:
304	cout << "OSD_FA_BoldItalic\n";
305	break;
306	case OSD_FA_Italic:
307	cout << "OSD_FA_Italic\n";
308	break;
309	case OSD_FA_Regular:
310	cout << "OSD_FA_Regular\n";
311	break;
312	default:
313	cout << "OSD_FA_Undefined\n";
314	break;
315	}
316	cout << " font height: "<<aFontHeight<<"\n";
317	cout << " font id: " << _CurrentFontId << "\n";
318	#endif
319
320	return _CurrentFontId;
321	}
322	}
323	//invalid family name
324	#ifdef TRACE
325	cout << "\n---Invalid Family Name!!!---\n";
326	#endif
327	return -1;
328	}
329
13a22457 S	330	void OpenGl_FontMgr::render_text( const Standard_Integer id, const wchar_t* text,
13a22457 S	331	const Standard_Boolean is2d )
7fd59977	332	{
	333	#ifdef TRACE
	334	cout << "TKOpenGl::render_text\n"
	335	<< "\tfont id = " << id << endl
	336	<< "\ttext = " << text << endl;
	337	#endif
	338	if ( text && _FontCache.IsBound( id ) ) {
	339	glMatrixMode( GL_MODELVIEW );
	340	glPushMatrix();
	341
	342	glScalef( _XCurrentScale, _YCurrentScale, 1 );
	343	glPushAttrib( GL_ENABLE_BIT );
	344
	345	GLboolean enableTexture = glIsEnabled(GL_TEXTURE_2D);
	346	GLboolean enableDepthTest = glIsEnabled(GL_DEPTH_TEST);
	347
	348	if( !enableTexture )
	349	glEnable(GL_TEXTURE_2D);
256d4320 A	350	if ( !is2d ) {
	351	if ( !enableDepthTest )
	352	glEnable(GL_DEPTH_TEST);
13a22457	353	}
256d4320 A	354	else if ( enableDepthTest ) {
	355	glDisable(GL_DEPTH_TEST);
	356	}
7fd59977	357
c320e557 A	358	GLint param;
c320e557 A	359	glGetTexEnviv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, &param);
7fd59977	360
	361	glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
	362	glAlphaFunc(GL_GEQUAL, 0.285f);
	363	glEnable(GL_ALPHA_TEST);
	364	OGLFont_Cache cache = _FontCache.Find( id );
	365	cache.Font->Render( text );
	366
c320e557	367	glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, param);
7fd59977	368
	369	if( !enableTexture )
	370	glDisable(GL_TEXTURE_2D);
	371	if( !enableDepthTest )
	372	glDisable(GL_DEPTH_TEST);
	373
7fd59977	374	glPopAttrib();
	375	glMatrixMode( GL_MODELVIEW );
	376	glPopMatrix();
	377	}
	378
	379	}
	380
13a22457 S	381	void OpenGl_FontMgr::render_text ( const wchar_t* text, const Standard_Boolean is2d )
13a22457 S	382	{
256d4320	383	render_text( _CurrentFontId, text, is2d );
7fd59977	384	}
7fd59977	385
13a22457 S	386	const FTFont* OpenGl_FontMgr::fontById (const Standard_Integer id)
13a22457 S	387	{
7fd59977	388	return _FontCache.IsBound( id ) ? _FontCache.Find( id ).Font: NULL;
	389	}
	390
13a22457 S	391	Standard_ShortReal OpenGl_FontMgr::computeWidth( const Standard_Integer id, const wchar_t* text )
13a22457 S	392	{
7fd59977	393	if( !_FontCache.IsBound( id ) )
	394	return 0.f;
	395
	396	OGLFont_Cache cache = _FontCache.Find( id );
7fd59977	397
13a22457	398	Standard_ShortReal w = cache.Font->Advance( text );
7fd59977	399
	400	return w;
	401	}
	402
13a22457 S	403	void OpenGl_FontMgr::setCurrentScale (const Standard_ShortReal xScale,
13a22457 S	404	const Standard_ShortReal yScale)
7fd59977	405	{
	406	_XCurrentScale = xScale;
	407	_YCurrentScale = yScale;
	408	}
	409
	410	#include <AlienImage_BMPAlienData.hxx>
	411	#include <OSD_File.hxx>
	412	#include <OSD_Protection.hxx>
	413	#include <Aspect_GenericColorMap.hxx>
	414	#include <Image_ColorImage.hxx>
	415	#include <Quantity_Color.hxx>
	416
13a22457 S	417	void dump_texture( int id)
13a22457 S	418	{
7fd59977	419	Handle(AlienImage_BMPAlienData) image = new AlienImage_BMPAlienData();
	420
	421	if (!glIsTexture(id))
	422	return;
	423
	424	unsigned char* pixels = new unsigned char[8192*1024];
	425	memset( pixels, 0, 8192*1024 );
	426	static int index = 0;
	427	index++;
	428
	429	glBindTexture(GL_TEXTURE_2D, id );
	430	glGetTexImage( GL_TEXTURE_2D ,
	431	0,
	432	GL_ALPHA,
	433	GL_UNSIGNED_BYTE,
	434	pixels );
	435
	436	Handle(Image_ColorImage) anImage = new Image_ColorImage( 0, 0, 1024, 8192 );
	437
	438	Aspect_ColorPixel mark( Quantity_Color (0.,0.5,1., Quantity_TOC_RGB ) ),
	439	space( Quantity_Color (1.,1.,1., Quantity_TOC_RGB ) );
	440
	441	for( int i = 0; i < 1024; i++ ) {
	442	for (int j = 0; j < 8192; j++ )
	443	if (pixels[i*8192+j]>0) {
	444	anImage->SetPixel( anImage->LowerX()+i,
	445	anImage->LowerY()+j,
	446	mark );
	447	}
	448	else {
	449	anImage->SetPixel( anImage->LowerX()+i,
	450	anImage->LowerY()+j,
	451	space );
	452	}
	453	}
	454
	455	image->FromImage( anImage );
	456	TCollection_AsciiString name( index );
	457	name.Prepend( "D:\\Temp_image" );
	458	name += ".bmp";
	459	OSD_File file ( name );
	460	file.Build( OSD_WriteOnly, OSD_Protection());
	461	image->Write(file);
	462	file.Close();
	463	delete []pixels;
	464	}