wg_resource_handle.cpp

// wg_resource_handle.cpp
//
// Resource Handle implementation
//
//
// Copyright (c) 2002-2004 Rob Wiskow
// rob-dev@boxedchaos.com
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//

#include "wgui_include_config.h"
#include "wg_resource_handle.h"
#include "wg_error.h"
#include "wutil_debug.h"

namespace wGui
{

std::map<TResourceId, unsigned int> CResourceHandle::m_RefCountMap;
std::map<TResourceId, SDL_Surface*> CBitmapResourceHandle::m_BitmapMap;
std::map<TResourceId, std::wstring> CStringResourceHandle::m_StringMap;
std::map<TResourceId, SDL_Cursor*> CCursorResourceHandle::m_SDLCursorMap;
TResourceId CResourceHandle::m_NextUnusedResourceId = 10000;


CResourceHandle::CResourceHandle(TResourceId resId) :
     m_ResourceId(resId)
{
     if (m_ResourceId == AUTO_CREATE_RESOURCE_ID)
     {
          while (m_RefCountMap.find(m_NextUnusedResourceId) != m_RefCountMap.end())
          {
               ++m_NextUnusedResourceId;
          }
          m_ResourceId = m_NextUnusedResourceId;
          ++m_NextUnusedResourceId;
     }
     if (m_RefCountMap.find(m_ResourceId) == m_RefCountMap.end() || m_RefCountMap[m_ResourceId] == 0)
     {
          m_RefCountMap[m_ResourceId] = 0;
     }
     ++m_RefCountMap[m_ResourceId];
}


CResourceHandle::CResourceHandle(const CResourceHandle& resHandle)
{
     m_ResourceId = resHandle.m_ResourceId;
     ++m_RefCountMap[m_ResourceId];
}


CResourceHandle::~CResourceHandle(void)
{
     if (GetRefCount() > 0)
     {
          --m_RefCountMap[m_ResourceId];
     }
     else
     {
          throw(Wg_Ex_App(L"CResourceHandle::~CResourceHandle : Trying to decrement refcount of zero!"));
     }
}


CBitmapResourceHandle::~CBitmapResourceHandle(void)
{
     if (GetRefCount() == 1 && m_BitmapMap.find(m_ResourceId) != m_BitmapMap.end())
     {
          SDL_FreeSurface(m_BitmapMap[m_ResourceId]);
          m_BitmapMap.erase(m_ResourceId);
     }
}


SDL_Surface* CBitmapResourceHandle::Bitmap(void) const
{
     return (m_BitmapMap.find(m_ResourceId) != m_BitmapMap.end()) ? m_BitmapMap[m_ResourceId] : 0;
}


CBitmapFileResourceHandle::CBitmapFileResourceHandle(std::wstring sFilename) :
     CBitmapResourceHandle(AUTO_CREATE_RESOURCE_ID),
     m_sFilename(sFilename)
{
     if (m_BitmapMap.find(m_ResourceId) == m_BitmapMap.end())
     {
          SDL_Surface* pSurface = SDL_LoadBMP(stdex::ToMbString(m_sFilename).c_str());
          if (!pSurface)
          {
               throw(Wg_Ex_App(L"CBitmapFileResourceHandle::CBitmapFileResourceHandle - Unable to load bitmap"));
          }
          m_BitmapMap[m_ResourceId] = pSurface;
     }
}


CStringResourceHandle::~CStringResourceHandle(void)
{
     if (GetRefCount() == 1 && m_StringMap.find(m_ResourceId) != m_StringMap.end())
     {
          m_StringMap.erase(m_ResourceId);
     }
}


const std::wstring CStringResourceHandle::String(void) const
{
     return (m_StringMap.find(m_ResourceId) != m_StringMap.end()) ? m_StringMap[m_ResourceId] : L"";
}


CCursorResourceHandle::~CCursorResourceHandle(void)
{
     if (GetRefCount() == 1 && m_SDLCursorMap.find(m_ResourceId) != m_SDLCursorMap.end())
     {
          SDL_FreeCursor(m_SDLCursorMap[m_ResourceId]);
          m_SDLCursorMap.erase(m_ResourceId);
     }
}


SDL_Cursor* CCursorResourceHandle::Cursor(void) const
{
     return (m_SDLCursorMap.find(m_ResourceId) != m_SDLCursorMap.end()) ? m_SDLCursorMap[m_ResourceId] : 0;
}

}

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