Line data    Source code

       1             : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
       2             : /*
       3             :  * This file is part of the LibreOffice project.
       4             :  *
       5             :  * This Source Code Form is subject to the terms of the Mozilla Public
       6             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       7             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
       8             :  */
       9             : 
      10             : #include "ogl_canvastools.hxx"
      11             : 
      12             : #include <canvas/debug.hxx>
      13             : #include <tools/diagnose_ex.h>
      14             : #include <basegfx/tools/canvastools.hxx>
      15             : #include <basegfx/matrix/b2dhommatrix.hxx>
      16             : #include <basegfx/tools/tools.hxx>
      17             : #include <basegfx/polygon/b2dpolypolygon.hxx>
      18             : #include <basegfx/polygon/b2dpolygontriangulator.hxx>
      19             : #include <basegfx/polygon/b2dpolypolygontools.hxx>
      20             : 
      21             : #include <com/sun/star/rendering/ARGBColor.hpp>
      22             : 
      23             : #include <GL/glew.h>
      24             : 
      25             : using namespace ::com::sun::star;
      26             : 
      27             : namespace oglcanvas
      28             : {
      29             :     /// triangulates polygon before
      30           0 :     void renderComplexPolyPolygon( const ::basegfx::B2DPolyPolygon& rPolyPoly )
      31             :     {
      32           0 :         ::basegfx::B2DPolyPolygon aPolyPoly(rPolyPoly);
      33           0 :         if( aPolyPoly.areControlPointsUsed() )
      34           0 :             aPolyPoly = rPolyPoly.getDefaultAdaptiveSubdivision();
      35           0 :         const ::basegfx::B2DRange& rBounds(aPolyPoly.getB2DRange());
      36           0 :         const double nWidth=rBounds.getWidth();
      37           0 :         const double nHeight=rBounds.getHeight();
      38             :         const ::basegfx::B2DPolygon& rTriangulatedPolygon(
      39           0 :             ::basegfx::triangulator::triangulate(aPolyPoly));
      40             : 
      41           0 :         for( sal_uInt32 i=0; i<rTriangulatedPolygon.count(); i++ )
      42             :         {
      43           0 :             const ::basegfx::B2DPoint& rPt( rTriangulatedPolygon.getB2DPoint(i) );
      44           0 :             const double s(rPt.getX()/nWidth);
      45           0 :             const double t(rPt.getY()/nHeight);
      46           0 :             glTexCoord2f(s,t); glVertex2d(rPt.getX(), rPt.getY());
      47           0 :         }
      48           0 :     }
      49             : 
      50             :     /** only use this for line polygons.
      51             : 
      52             :         better not leave triangulation to OpenGL. also, ignores texturing
      53             :     */
      54           0 :     void renderPolyPolygon( const ::basegfx::B2DPolyPolygon& rPolyPoly )
      55             :     {
      56           0 :         ::basegfx::B2DPolyPolygon aPolyPoly(rPolyPoly);
      57           0 :         if( aPolyPoly.areControlPointsUsed() )
      58           0 :             aPolyPoly = rPolyPoly.getDefaultAdaptiveSubdivision();
      59             : 
      60           0 :         for( sal_uInt32 i=0; i<aPolyPoly.count(); i++ )
      61             :         {
      62           0 :             glBegin(GL_LINE_STRIP);
      63             : 
      64           0 :             const ::basegfx::B2DPolygon& rPolygon( aPolyPoly.getB2DPolygon(i) );
      65             : 
      66           0 :             const sal_uInt32 nPts=rPolygon.count();
      67           0 :             const sal_uInt32 nExtPts=nPts + int(rPolygon.isClosed());
      68           0 :             for( sal_uInt32 j=0; j<nExtPts; j++ )
      69             :             {
      70           0 :                 const ::basegfx::B2DPoint& rPt( rPolygon.getB2DPoint( j % nPts ) );
      71           0 :                 glVertex2d(rPt.getX(), rPt.getY());
      72           0 :             }
      73             : 
      74           0 :             glEnd();
      75           0 :         }
      76           0 :     }
      77             : 
      78           0 :     void setupState( const ::basegfx::B2DHomMatrix&   rTransform,
      79             :                      GLenum                           eSrcBlend,
      80             :                      GLenum                           eDstBlend,
      81             :                      const rendering::ARGBColor&      rColor )
      82             :     {
      83             :         double aGLTransform[] =
      84             :             {
      85           0 :                 rTransform.get(0,0), rTransform.get(1,0), 0, 0,
      86           0 :                 rTransform.get(0,1), rTransform.get(1,1), 0, 0,
      87             :                 0,                   0,                   1, 0,
      88           0 :                 rTransform.get(0,2), rTransform.get(1,2), 0, 1
      89           0 :             };
      90           0 :         glMultMatrixd(aGLTransform);
      91             : 
      92           0 :         glEnable(GL_BLEND);
      93           0 :         glBlendFunc(eSrcBlend, eDstBlend);
      94             : 
      95             :         glColor4d(rColor.Red,
      96             :                   rColor.Green,
      97             :                   rColor.Blue,
      98           0 :                   rColor.Alpha);
      99             : 
     100             :         // GL 1.2:
     101             :         // glBlendEquation( GLenum mode );
     102             :         // glBlendColor( GLclampf red, GLclampf green,GLclampf blue, GLclampf alpha );
     103             :         // glConvolutionFilter1D
     104             :         // glConvolutionFilter2D
     105             :         // glSeparableFilter2D
     106           0 :     }
     107             : 
     108           0 :     void renderOSD( const std::vector<double>& rNumbers, double scale )
     109             :     {
     110           0 :         double y=4.0;
     111           0 :         basegfx::B2DHomMatrix aTmp;
     112           0 :         basegfx::B2DHomMatrix aScaleShear;
     113           0 :         aScaleShear.shearX(-0.1);
     114           0 :         aScaleShear.scale(scale,scale);
     115             : 
     116           0 :         for( size_t i=0; i<rNumbers.size(); ++i )
     117             :         {
     118           0 :             aTmp.identity();
     119           0 :             aTmp.translate(0,y);
     120           0 :             y += 1.2*scale;
     121             : 
     122             :             basegfx::B2DPolyPolygon aPoly=
     123           0 :                 basegfx::tools::number2PolyPolygon(rNumbers[i],10,3);
     124             : 
     125           0 :             aTmp=aTmp*aScaleShear;
     126           0 :             aPoly.transform(aTmp);
     127             : 
     128           0 :             glColor4f(0,1,0,1);
     129           0 :             renderPolyPolygon(aPoly);
     130           0 :         }
     131           0 :     }
     132             : }
     133             : 
     134             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */