kc3-lang/ftgl/src/FTGlyph/FTOutlineGlyph.cpp

• Show log

  Commit

• Hash : 8cca0305
  Author :
  Date : 2018-01-29T03:02:31
  

  FTOutlineGlyphImpl, FTPolygonGlyphImpl: avoid uninizitalized vectoriser in case of error (see Debian bug #589601, 1.)

Download

• src/FTGlyph/FTOutlineGlyph.cpp

• /*
   * FTGL - OpenGL font library
   *
   * Copyright (c) 2001-2004 Henry Maddocks <ftgl@opengl.geek.nz>
   * Copyright (c) 2008 Éric Beets <ericbeets@free.fr>
   * Copyright (c) 2008 Sam Hocevar <sam@hocevar.net>
   *
   * Permission is hereby granted, free of charge, to any person obtaining
   * a copy of this software and associated documentation files (the
   * "Software"), to deal in the Software without restriction, including
   * without limitation the rights to use, copy, modify, merge, publish,
   * distribute, sublicense, and/or sell copies of the Software, and to
   * permit persons to whom the Software is furnished to do so, subject to
   * the following conditions:
   *
   * The above copyright notice and this permission notice shall be
   * included in all copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
   * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
   * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
   * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
   * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
   * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
   * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
   */
  
  #include "config.h"
  
  #include "FTGL/ftgl.h"
  
  #include "FTInternals.h"
  #include "FTOutlineGlyphImpl.h"
  #include "FTVectoriser.h"
  
  
  //
  //  FTGLOutlineGlyph
  //
  
  
  FTOutlineGlyph::FTOutlineGlyph(FT_GlyphSlot glyph, float outset,
                                 bool useDisplayList) :
      FTGlyph(new FTOutlineGlyphImpl(glyph, outset, useDisplayList))
  {}
  
  
  FTOutlineGlyph::~FTOutlineGlyph()
  {}
  
  
  const FTPoint& FTOutlineGlyph::Render(const FTPoint& pen, int renderMode)
  {
      FTOutlineGlyphImpl *myimpl = dynamic_cast<FTOutlineGlyphImpl *>(impl);
      return myimpl->RenderImpl(pen, renderMode);
  }
  
  
  //
  //  FTGLOutlineGlyphImpl
  //
  
  
  FTOutlineGlyphImpl::FTOutlineGlyphImpl(FT_GlyphSlot glyph, float _outset,
                                         bool useDisplayList)
  :   FTGlyphImpl(glyph),
      vectoriser(0),
      glList(0)
  {
      if(ft_glyph_format_outline != glyph->format)
      {
          err = 0x14; // Invalid_Outline
          return;
      }
  
      vectoriser = new FTVectoriser(glyph);
  
      if((vectoriser->ContourCount() < 1) || (vectoriser->PointCount() < 3))
      {
          delete vectoriser;
          vectoriser = NULL;
          return;
      }
  
      outset = _outset;
  
      if(useDisplayList)
      {
          glList = glGenLists(1);
          glNewList(glList, GL_COMPILE);
  
          DoRender();
  
          glEndList();
  
          delete vectoriser;
          vectoriser = NULL;
      }
  }
  
  
  FTOutlineGlyphImpl::~FTOutlineGlyphImpl()
  {
      if(glList)
      {
          glDeleteLists(glList, 1);
      }
      else if(vectoriser)
      {
          delete vectoriser;
      }
  }
  
  
  const FTPoint& FTOutlineGlyphImpl::RenderImpl(const FTPoint& pen,
                                                int renderMode)
  {
      (void)renderMode;
  
      glTranslatef(pen.Xf(), pen.Yf(), pen.Zf());
      if(glList)
      {
          glCallList(glList);
      }
      else if(vectoriser)
      {
          DoRender();
      }
      glTranslatef(-pen.Xf(), -pen.Yf(), -pen.Zf());
  
      return advance;
  }
  
  
  void FTOutlineGlyphImpl::DoRender()
  {
      for(unsigned int c = 0; c < vectoriser->ContourCount(); ++c)
      {
          const FTContour* contour = vectoriser->Contour(c);
  
          glBegin(GL_LINE_LOOP);
              for(unsigned int i = 0; i < contour->PointCount(); ++i)
              {
                  FTPoint point = FTPoint(contour->Point(i).X() + contour->Outset(i).X() * outset,
                                          contour->Point(i).Y() + contour->Outset(i).Y() * outset,
                                          0);
                  glVertex2f(point.Xf() / 64.0f, point.Yf() / 64.0f);
              }
          glEnd();
      }
  }
  
  

Download