}
}
+/*
+ Class : MultilineTextRenderer
+ Description : Class for constructing text and multi-line text
+*/
+
+class MultilineTextRenderer
+{
+ private:
+
+ Standard_Integer myLFNum; // Number of '\n' (Line Feed) '\x00\x0A'
+ Standard_Integer myCurrPos; // Position of the current substring
+ Standard_Integer myNewStrLen; // Length of the new string
+ Standard_Integer mySubstrNum; // Number of substrings
+ wchar_t *myNewStr; // New string
+ const wchar_t *myStrPtr; // Pointer to the original string
+
+ public:
+
+ // ----------------------------------------------
+ // Function: MultilineTextRenderer
+ // Purpose: Constructor with initialization
+ // ----------------------------------------------
+ MultilineTextRenderer ( const wchar_t *theStr,
+ GLdouble &theXdis,
+ GLdouble &theYdis,
+ const OpenGl_TextParam *theParam,
+ const FTFont *theFnt,
+ GLint theWidthFont,
+ GLint theAscentFont,
+ GLint theDescentFont ) :
+
+ myLFNum (0),
+ myCurrPos (0),
+ myNewStrLen (0),
+ mySubstrNum (0),
+ myNewStr (0),
+ myStrPtr (&theStr[0])
+ {
+ const Standard_Integer aStrLen = wcslen(theStr); // Length of the original string
+ Standard_Integer aNextCRChar = 0; // Character after '\r' (Carriage Return) '\x00\x0D'
+ Standard_Integer aHTNum = 0; // Number of '\t' (Horizontal Tabulation) '\x00\x09'
+ Standard_Integer aDumpNum = 0; // Number of '\a', '\b', '\v' and '\f'
+ Standard_Integer anAllSpaces = 0; // Number of spaces instead of all '\t' characters
+ Standard_Integer aMaxSubstrLen = 0; // Length of the largest substring in the new string
+
+ Standard_Integer aTimeVar = 0;
+
+ // Calculation index after last '\r' character
+ for ( Standard_Integer anIndex = 0; anIndex < aStrLen; ++anIndex )
+ {
+ if ( theStr[anIndex] == '\r' ) aNextCRChar = anIndex+1;
+ }
+
+ // Calculation numbers of the some control characters
+ for (Standard_Integer anIndex = aNextCRChar; anIndex < aStrLen; anIndex++)
+ {
+ ++aTimeVar;
+ switch ( theStr[anIndex] )
+ {
+ case '\n':
+ ++myLFNum;
+ aTimeVar = 0;
+ break;
+ case '\b':
+ case '\v':
+ case '\f':
+ case '\a':
+ ++aDumpNum;
+ --aTimeVar;
+ break;
+ case '\t':
+ ++aHTNum;
+ anAllSpaces += ( 8 - ( aTimeVar - 1 )%8 );
+ aTimeVar = 0;
+ break;
+ }
+ }
+
+ // Calculation length of the new string
+ myStrPtr += aNextCRChar;
+ myNewStrLen = aStrLen - aNextCRChar + anAllSpaces - aHTNum - aDumpNum;
+
+ myNewStr = new wchar_t[myNewStrLen + 1];
+ myNewStr[myNewStrLen]='\0';
+
+ CalcString (aStrLen, aMaxSubstrLen);
+ CalcHAlign (theXdis, theParam, theWidthFont, aStrLen, aMaxSubstrLen);
+ CalcVAlign (theYdis, theParam, theFnt, theAscentFont, theDescentFont);
+ }
+
+ // ----------------------------------------------
+ // Function: ~MultilineTextRenderer
+ // Purpose: Default destructor
+ // ----------------------------------------------
+ ~MultilineTextRenderer ()
+ {
+ delete[] myNewStr;
+ }
+
+ // ----------------------------------------------
+ // Function: Next
+ // Purpose: Calculate position of the next substring
+ // ----------------------------------------------
+ void Next ()
+ {
+ for ( Standard_Integer anIndex = 0; anIndex <= myNewStrLen; ++anIndex )
+ {
+ if ( myNewStr[myCurrPos + anIndex] == '\0' )
+ {
+ ++mySubstrNum;
+ myCurrPos += anIndex + 1;
+ break;
+ }
+ }
+ }
+
+ // ----------------------------------------------
+ // Function: More
+ // Purpose: Calculate position of the next substring
+ // ----------------------------------------------
+ Standard_Boolean More ()
+ {
+ if ( mySubstrNum <= myLFNum ) return Standard_True;
+ else return Standard_False;
+ }
+
+ // ----------------------------------------------
+ // Function: GetValue
+ // Purpose: Returns current substring
+ // ----------------------------------------------
+ wchar_t* GetValue ()
+ {
+ return ( myNewStr + myCurrPos );
+ }
+
+ private:
+
+ // ----------------------------------------------
+ // Function: CalcString
+ // Purpose: Calculate new string separated by '\0' without '\n', '\t', '\b', '\v', '\f', '\a'
+ // ----------------------------------------------
+ void CalcString ( const Standard_Integer theStrLen, Standard_Integer &theMaxSubstrLen )
+ {
+ Standard_Integer
+ aHelpIndex = 0,
+ aTimeVar = 0,
+ aSpacesNum = 0;
+
+ for ( Standard_Integer anIndex1 = 0, anIndex2 = 0;
+ (anIndex1 < theStrLen)&&(anIndex2 < myNewStrLen);
+ ++anIndex1, ++anIndex2 )
+ {
+ ++aTimeVar;
+
+ if ( *(myStrPtr + anIndex1) == '\n' ) aTimeVar = 0;
+
+ while ( (*(myStrPtr + anIndex1)=='\b')||(*(myStrPtr + anIndex1)=='\f')
+ ||(*(myStrPtr + anIndex1)=='\v')||(*(myStrPtr + anIndex1)=='\a') )
+ {
+ ++anIndex1;
+ }
+
+ if ( *(myStrPtr + anIndex1) == '\t' )
+ {
+ aSpacesNum = ( 8 - ( aTimeVar - 1 )%8 );
+
+ for ( aHelpIndex = 0; aHelpIndex < aSpacesNum; aHelpIndex++ )
+ {
+ myNewStr[anIndex2 + aHelpIndex] = ' ';
+ }
+ anIndex2 += aHelpIndex - 1;
+ aTimeVar = 0;
+ }
+ else
+ {
+ myNewStr[anIndex2] = *(myStrPtr + anIndex1);
+ }
+ }
+
+ // After this part of code we will have a string separated by '\0' characters
+ Standard_Integer aHelpLength = 0;
+
+ if( myNewStr )
+ {
+ for( Standard_Integer anIndex = 0; anIndex <= myNewStrLen; ++anIndex )
+ {
+ if ( myNewStr[anIndex] == '\n' )
+ {
+ myNewStr[anIndex] = '\0';
+ }
+
+ // Calculating length of the largest substring of the new string.
+ // It's needed for horizontal alignment
+ if ( myNewStr[anIndex] != '\0' )
+ {
+ ++aHelpLength;
+ }
+ else
+ {
+ if ( aHelpLength > theMaxSubstrLen ) theMaxSubstrLen = aHelpLength;
+
+ aHelpLength = 0;
+ }
+ }
+ }
+ }
+
+ // ----------------------------------------------
+ // Function: CalcVAlign
+ // Purpose: Calculate vertical alignment for text
+ // ----------------------------------------------
+ void CalcVAlign ( GLdouble &theYdis,
+ const OpenGl_TextParam *theParam,
+ const FTFont *theFnt,
+ GLint theAscentFont,
+ GLint theDescentFont )
+ {
+ switch (theParam->VAlign)
+ {
+ case Graphic3d_VTA_BOTTOM:
+ theYdis = (GLdouble)(myLFNum * theFnt->FaceSize());
+ break;
+ case Graphic3d_VTA_CENTER:
+ if ( (myLFNum%2) == 0 ) // An odd number of strings
+ {
+ theYdis = (GLdouble)((myLFNum/2.0) * theFnt->FaceSize()) + theDescentFont;
+ }
+ else // An even number of strings
+ {
+ theYdis = (GLdouble)((myLFNum - 1)/2.0 * theFnt->FaceSize()) - theDescentFont/2.0;
+ }
+ break;
+ case Graphic3d_VTA_TOP:
+ theYdis = -(GLdouble)theAscentFont - theDescentFont;
+ break;
+ default:
+ theYdis = (GLdouble)(myLFNum * theFnt->FaceSize());
+ break;
+ }
+ }
+
+ // ----------------------------------------------
+ // Function: CalcHAlign
+ // Purpose: Calculate horizontal alignment for text
+ // ----------------------------------------------
+ void CalcHAlign ( GLdouble &theXdis,
+ const OpenGl_TextParam *theParam,
+ GLint theWidthFont,
+ const Standard_Integer theStrLen,
+ Standard_Integer theMaxSubstrLen)
+ {
+ GLdouble aWidth = (GLdouble)(theMaxSubstrLen * theWidthFont)/theStrLen;
+
+ switch (theParam->HAlign)
+ {
+ case Graphic3d_HTA_LEFT:
+ theXdis = 0.;
+ break;
+ case Graphic3d_HTA_CENTER:
+ theXdis = -0.5 * (GLdouble)aWidth;
+ break;
+ case Graphic3d_HTA_RIGHT:
+ theXdis = -(GLdouble)aWidth;
+ break;
+ default:
+ theXdis = 0.;
+ break;
+ }
+ }
+};
+
/*-----------------------------------------------------------------------------*/
void OpenGl_Display::RenderText (const wchar_t* str, const int is2d, const float x, const float y, const float z,
int widthFont, ascentFont, descentFont;
StringSize( str, widthFont, ascentFont, descentFont );
- GLdouble xdis = 0.;
- switch (param->HAlign)
- {
- case Graphic3d_HTA_CENTER:
- xdis = -0.5 * (GLdouble)widthFont;
- break;
- case Graphic3d_HTA_RIGHT:
- xdis = -(GLdouble)widthFont;
- break;
- //case Graphic3d_HTA_LEFT:
- //default: break;
- }
- GLdouble ydis = 0.;
- switch (param->VAlign)
- {
- case Graphic3d_VTA_CENTER:
- ydis = -0.5 * (GLdouble)ascentFont - descentFont;
- break;
- case Graphic3d_VTA_TOP:
- ydis = -(GLdouble)ascentFont - descentFont;
- break;
- //case Graphic3d_VTA_BOTTOM:
- //default: break;
- }
+ GLdouble xdis = 0., ydis = 0.;
float export_h = 1.;
+ MultilineTextRenderer aRenderer( str,
+ xdis,
+ ydis,
+ param,
+ fnt,
+ widthFont,
+ ascentFont,
+ descentFont );
+
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
if (is2d)
}
else
{
- export_h = (float )h;
+ export_h = (float)h;
}
}
{
#ifdef HAVE_GL2PS
export_h = (float)fnt->FaceSize() / export_h;
- glPopMatrix();
- ExportText( str, is2d, x, y, z, aspect, param, (short)export_h );
+ for ( ; aRenderer.More(); aRenderer.Next() )
+ {
+ // x, y, z coordinates are used here as zero values, because position of the text
+ // and alignment is calculated in the code above using glTranslated methods
+ ExportText( aRenderer.GetValue(), is2d, 0, 0, 0, aspect, param, (short)export_h );
+ glTranslated(0, -(GLdouble)fnt->FaceSize(), 0);
+ }
#endif
}
else
{
- mgr->render_text( myFont, str, is2d );
- glPopMatrix();
+ for ( ; aRenderer.More(); aRenderer.Next() )
+ {
+ mgr->render_text( myFont, aRenderer.GetValue(), is2d );
+ glTranslated(0, -(GLdouble)fnt->FaceSize(), 0);
+ }
}
+ glPopMatrix();
glPopAttrib();
}
/*-----------------------------------------------------------------------------*/
-static const int alignmentforgl2ps[3][3] = { {5,2,8}, {4,1,7}, {6,3,9} };
-
void OpenGl_Display::ExportText (const wchar_t* text, const int is2d, const float x, const float y, const float z,
const OpenGl_AspectText *aspect, const OpenGl_TextParam *param, const short height)
{
#ifdef HAVE_GL2PS
- int vh = 1;
- switch (param->HAlign)
- {
- case Graphic3d_HTA_CENTER: vh = 2; break;
- case Graphic3d_HTA_RIGHT: vh = 3; break;
- //case Graphic3d_HTA_LEFT:
- //default: break;
- }
-
- int vv = 1;
- switch (param->VAlign)
- {
- case Graphic3d_VTA_CENTER: vv = 2; break;
- case Graphic3d_VTA_TOP: vv = 3; break;
- //case Graphic3d_VTA_BOTTOM:
- //default: break;
- }
-
- const int alignment = alignmentforgl2ps[vh-1][vv-1];
-
const char* fontname = aspect->Font();
float angle = aspect->Angle();
const int len = 4 * (wcslen(text) + 1); //szv: should be more than enough
char *astr = new char[len];
wcstombs(astr,text,len);
- gl2psTextOpt(astr, ps_font, height, alignment, angle);
+
+ // Standard GL2PS's alignment isn't used, because it doesn't work correctly
+ // for all formats, therefore alignment is calculated manually relative
+ // to the bottom-left corner, which corresponds to the GL2PS_TEXT_BL value
+ gl2psTextOpt(astr, ps_font, height, GL2PS_TEXT_BL, angle);
delete[] astr;
#endif
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