src/MapWindow/MapDrawHelper.hpp

   1 /*
   2 Copyright_License {
   3
   4   XCSoar Glide Computer - http://www.xcsoar.org/
   5   Copyright (C) 2000-2013 The XCSoar Project
   6   A detailed list of copyright holders can be found in the file "AUTHORS".
   7
   8   This program is free software; you can redistribute it and/or
   9   modify it under the terms of the GNU General Public License
  10   as published by the Free Software Foundation; either version 2
  11   of the License, or (at your option) any later version.
  12
  13   This program is distributed in the hope that it will be useful,
  14   but WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16   GNU General Public License for more details.
  17
  18   You should have received a copy of the GNU General Public License
  19   along with this program; if not, write to the Free Software
  20   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  21 }
  22 */
  23
  24 #ifndef MAP_DRAW_HELPER_HPP
  25 #define MAP_DRAW_HELPER_HPP
  26
  27 #ifndef ENABLE_OPENGL
  28
  29 #include "Geo/GeoClip.hpp"
  30 #include "Util/AllocatedArray.hpp"
  31
  32 struct RasterPoint;
  33 class Canvas;
  34 class Projection;
  35 class WindowProjection;
  36 struct AirspaceRendererSettings;
  37 class SearchPointVector;
  38
  39 /**
  40  * Utility class to draw multilayer items on a canvas with stencil masking
  41  */
  42 class MapDrawHelper
  43 {
  44   const GeoClip clip;
  45
  46   /**
  47    * A variable-length buffer for clipped GeoPoints.
  48    */
  49   AllocatedArray<GeoPoint> geo_points;
  50
  51 public:
  52   Canvas &canvas;
  53   Canvas &buffer;
  54   Canvas &stencil;
  55   const Projection &proj;
  56   bool buffer_drawn;
  57   bool use_stencil;
  58
  59   const AirspaceRendererSettings &settings;
  60
  61 public:
  62   MapDrawHelper(Canvas &_canvas,
  63                 Canvas &_buffer,
  64                 Canvas &_stencil,
  65                 const WindowProjection &_proj,
  66                 const AirspaceRendererSettings &_settings);
  67
  68   MapDrawHelper(const MapDrawHelper &other);
  69
  70 protected:
  71   void DrawSearchPointVector(const SearchPointVector &points);
  72
  73   void DrawCircle(const RasterPoint &center, unsigned radius);
  74
  75   void BufferRenderStart();
  76   void BufferRenderFinish();
  77
  78   void ClearBuffer();
  79 };
  80
  81 #endif // !ENABLE_OPENGL
  82
  83 #endif