src/Screen/VirtualCanvas.cpp

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