src/OpenGl/OpenGl_GraphicDriver_Export.cxx

   1 // Copyright (c) 1999-2014 OPEN CASCADE SAS
   2 //
   3 // This file is part of Open CASCADE Technology software library.
   4 //
   5 // This library is free software; you can redistribute it and/or modify it under
   6 // the terms of the GNU Lesser General Public License version 2.1 as published
   7 // by the Free Software Foundation, with special exception defined in the file
   8 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
   9 // distribution for complete text of the license and disclaimer of any warranty.
  10 //
  11 // Alternatively, this file may be used under the terms of Open CASCADE
  12 // commercial license or contractual agreement.
  13
  14 #include <OpenGl_GraphicDriver.hxx>
  15 #include <OpenGl_Context.hxx>
  16 #include <OpenGl_CView.hxx>
  17
  18 #include <Standard_CLocaleSentry.hxx>
  19
  20 #ifdef HAVE_CONFIG_H
  21 # include <config.h>
  22 #endif
  23
  24 #ifdef HAVE_GL2PS
  25 #include <gl2ps.h>
  26 #endif
  27
  28 /************************************************************************/
  29 /* Print Methods                                                        */
  30 /************************************************************************/
  31
  32 #ifdef HAVE_GL2PS
  33 Standard_Boolean OpenGl_GraphicDriver::Export (const Standard_CString theFileName,
  34                                                const Graphic3d_ExportFormat theFormat,
  35                                                const Graphic3d_SortType theSortType,
  36                                                const Standard_Integer theWidth,
  37                                                const Standard_Integer theHeight,
  38                                                const Graphic3d_CView& theView,
  39                                                const Aspect_CLayer2d& theLayerUnder,
  40                                                const Aspect_CLayer2d& theLayerOver,
  41                                                const Standard_Real    /*thePrecision*/,
  42                                                const Standard_Address /*theProgressBarFunc*/,
  43                                                const Standard_Address /*theProgressObject*/)
  44 {
  45   // gl2psBeginPage() will call OpenGL functions
  46   // so we should activate correct GL context before redraw scene call
  47   const OpenGl_CView* aCView = (const OpenGl_CView* )theView.ptrView;
  48   if (aCView == NULL || !aCView->WS->GetGlContext()->MakeCurrent())
  49   {
  50     return Standard_False;
  51   }
  52
  53   Standard_Integer aFormat = -1;
  54   Standard_Integer aSortType = Graphic3d_ST_BSP_Tree;
  55   switch (theFormat)
  56   {
  57     case Graphic3d_EF_PostScript:
  58       aFormat = GL2PS_PS;
  59       break;
  60     case Graphic3d_EF_EnhPostScript:
  61       aFormat = GL2PS_EPS;
  62       break;
  63     case Graphic3d_EF_TEX:
  64       aFormat = GL2PS_TEX;
  65       break;
  66     case Graphic3d_EF_PDF:
  67       aFormat = GL2PS_PDF;
  68       break;
  69     case Graphic3d_EF_SVG:
  70       aFormat = GL2PS_SVG;
  71       break;
  72     case Graphic3d_EF_PGF:
  73       aFormat = GL2PS_PGF;
  74       break;
  75     case Graphic3d_EF_EMF:
  76       //aFormat = GL2PS_EMF;
  77       aFormat = GL2PS_PGF + 1; // 6
  78       break;
  79     default:
  80       // unsupported format
  81       return Standard_False;
  82   }
  83
  84   switch (theSortType)
  85   {
  86     case Graphic3d_ST_Simple:
  87       aSortType = GL2PS_SIMPLE_SORT;
  88       break;
  89     case Graphic3d_ST_BSP_Tree:
  90       aSortType = GL2PS_BSP_SORT;
  91       break;
  92   }
  93
  94   GLint aViewport[4];
  95   aViewport[0] = 0;
  96   aViewport[1] = 0;
  97   aViewport[2] = theWidth;
  98   aViewport[3] = theHeight;
  99
 100   GLint aBufferSize = 1024 * 1024;
 101   GLint anErrCode = GL2PS_SUCCESS;
 102
 103   // gl2ps uses standard write functions and do not check locale
 104   Standard_CLocaleSentry aLocaleSentry;
 105
 106   while (aBufferSize > 0)
 107   {
 108     // current patch for EMF support in gl2ps uses WinAPI functions to create file
 109     FILE* aFileH = (theFormat != Graphic3d_EF_EMF) ? fopen (theFileName, "wb") : NULL;
 110     anErrCode = gl2psBeginPage ("", "", aViewport, aFormat, aSortType,
 111                     GL2PS_DRAW_BACKGROUND | GL2PS_OCCLUSION_CULL | GL2PS_BEST_ROOT/* | GL2PS_SIMPLE_LINE_OFFSET*/,
 112                     GL_RGBA, 0, NULL,
 113                     0, 0, 0, aBufferSize, aFileH, theFileName);
 114     if (anErrCode != GL2PS_SUCCESS)
 115     {
 116       // initialization failed
 117       if (aFileH != NULL)
 118         fclose (aFileH);
 119       break;
 120     }
 121     Redraw (theView, theLayerUnder, theLayerOver);
 122
 123     anErrCode = gl2psEndPage();
 124     if (aFileH != NULL)
 125       fclose (aFileH);
 126
 127     if (anErrCode == GL2PS_OVERFLOW)
 128       aBufferSize *= 2;
 129     else
 130       break;
 131   }
 132   return anErrCode == GL2PS_SUCCESS;
 133 }
 134 #else
 135 Standard_Boolean OpenGl_GraphicDriver::Export (const Standard_CString /*theFileName*/,
 136                                                const Graphic3d_ExportFormat /*theFormat*/,
 137                                                const Graphic3d_SortType /*theSortType*/,
 138                                                const Standard_Integer /*theWidth*/,
 139                                                const Standard_Integer /*theHeight*/,
 140                                                const Graphic3d_CView& /*theView*/,
 141                                                const Aspect_CLayer2d& /*theLayerUnder*/,
 142                                                const Aspect_CLayer2d& /*theLayerOver*/,
 143                                                const Standard_Real    /*thePrecision*/,
 144                                                const Standard_Address /*theProgressBarFunc*/,
 145                                                const Standard_Address /*theProgressObject*/)
 146 {
 147     return Standard_False;
 148 }
 149 #endif