src/Screen/VirtualCanvas.cpp

   1 /*
   2 Copyright_License {
   3
   4   XCSoar Glide Computer - http://www.xcsoar.org/
   5   Copyright (C) 2000-2012 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 #include "Screen/VirtualCanvas.hpp"
  25
  26 #include <assert.h>
  27
  28 #ifdef ENABLE_SDL
  29
  30 VirtualCanvas::VirtualCanvas(UPixelScalar _width, UPixelScalar _height)
  31 {
  32   set(_width, _height);
  33 }
  34
  35 VirtualCanvas::VirtualCanvas(const Canvas &canvas,
  36                              UPixelScalar _width, UPixelScalar _height)
  37 {
  38   set(_width, _height);
  39 }
  40
  41 #else /* !ENABLE_SDL */
  42
  43 VirtualCanvas::VirtualCanvas(UPixelScalar _width, UPixelScalar _height)
  44   :Canvas(::CreateCompatibleDC(NULL), _width, _height)
  45 {
  46 }
  47
  48 VirtualCanvas::VirtualCanvas(const Canvas &canvas,
  49                              UPixelScalar _width, UPixelScalar _height)
  50   :Canvas(::CreateCompatibleDC(canvas), _width, _height)
  51 {
  52   assert(canvas.IsDefined());
  53 }
  54
  55 #endif /* !ENABLE_SDL */
  56
  57 #ifndef ENABLE_OPENGL
  58
  59 VirtualCanvas::~VirtualCanvas()
  60 {
  61   reset();
  62 }
  63
  64 #endif /* !OPENGL */
  65
  66 void
  67 VirtualCanvas::set(UPixelScalar _width, UPixelScalar _height)
  68 {
  69   assert((PixelScalar)_width >= 0);
  70   assert((PixelScalar)_height >= 0);
  71
  72 #ifdef ENABLE_OPENGL
  73   Canvas::set(_width, _height);
  74 #else /* !OPENGL */
  75
  76   reset();
  77
  78 #ifdef ENABLE_SDL
  79   const SDL_Surface *video = ::SDL_GetVideoSurface();
  80   assert(video != NULL);
  81   const SDL_PixelFormat *format = video->format;
  82
  83   SDL_Surface *surface;
  84   surface = ::SDL_CreateRGBSurface(SDL_SWSURFACE, _width, _height,
  85                                    format->BitsPerPixel,
  86                                    format->Rmask, format->Gmask,
  87                                    format->Bmask, format->Amask);
  88   if (surface != NULL)
  89     Canvas::set(surface);
  90 #else /* !ENABLE_SDL */
  91   Canvas::set(CreateCompatibleDC(NULL), _width, _height);
  92 #endif /* !ENABLE_SDL */
  93 #endif /* !OPENGL */
  94 }
  95
  96 void
  97 VirtualCanvas::set(const Canvas &canvas,
  98                    UPixelScalar _width, UPixelScalar _height)
  99 {
 100   assert(canvas.IsDefined());
 101
 102 #ifdef ENABLE_SDL
 103   set(_width, _height);
 104 #else /* !ENABLE_SDL */
 105   reset();
 106   Canvas::set(CreateCompatibleDC(canvas), _width, _height);
 107 #endif /* !ENABLE_SDL */
 108 }
 109
 110 void
 111 VirtualCanvas::set(const Canvas &canvas)
 112 {
 113   set(canvas, canvas.get_width(), canvas.get_height());
 114 }
 115
 116 #ifndef ENABLE_SDL
 117 void VirtualCanvas::reset()
 118 {
 119   Canvas::reset();
 120
 121   if (dc != NULL)
 122     ::DeleteDC(dc);
 123 }
 124 #endif /* !ENABLE_SDL */