source: dev/branches/egtra/ab5.0/abdev/abdev-impl/Resource/Load.cpp@ 789

#include "stdafx.h"
#include <Resource/Load.h>

namespace ActiveBasic { namespace Resource {

namespace {

template<typename Map, typename Key, typename AddValueFunctor>
typename Map::iterator GetCacheFromMap(Map& map, Key key, AddValueFunctor f)
{
    auto low = map.lower_bound(key);
    if (low != map.end() && map.key_comp()(key, low->first))
    {
        return low;
    }
    else
    {
        typedef typename Map::key_type key_type;
        typedef typename Map::value_type value_type;
        return map.insert(low, std::make_pair(std::move(key), f()));
    }
}

HICON LoadIconCursorImpl(HINSTANCE hinst, USHORT id, int cxDesired, int cyDesired, UINT load, bool isIcon)
{
    auto hrsrc = FindResource(hinst, MAKEINTRESOURCE(id), isIcon ? RT_GROUP_ICON : RT_GROUP_CURSOR);
    auto pResource = LockResource(LoadResource(hinst, hrsrc));

    auto idIcon = LookupIconIdFromDirectoryEx(reinterpret_cast<PBYTE>(pResource), isIcon, cxDesired, cyDesired, load);
    auto hrsrcIcon = FindResource(hinst, MAKEINTRESOURCE(idIcon), isIcon ? RT_ICON : RT_CURSOR);
    auto pResourceIcon = LockResource(LoadResource(hinst, hrsrcIcon));

    return CreateIconFromResourceEx(reinterpret_cast<PBYTE>(pResourceIcon),
        SizeofResource(hinst, hrsrcIcon), isIcon, 0x00030000, cxDesired, cyDesired, load);
}

}

HICON LoadIcon(HINSTANCE hinst, USHORT id, int cxDesired, int cyDesired, UINT load)
{
    return LoadIconCursorImpl(hinst, id, cxDesired, cyDesired, load, true);
}

HICON LoadIcon(HINSTANCE hinst, USHORT id)
{
    return LoadIconCursorImpl(hinst, id, 32, 32, LR_SHARED, true);
}

HCURSOR LoadCursor(HINSTANCE hinst, USHORT id)
{
    return LoadIconCursorImpl(hinst, id, 32, 32, LR_SHARED, false);
}

// 文字列リソースの読み込みについては以下を参照。
// How To Use LoadResource to Load Strings from a String Table
// http://support.microsoft.com/kb/200893/en-us
boost::optional<std::wstring> LoadString(HINSTANCE hinst, USHORT id)
{
    UINT idRsrcBlk = id / 16 + 1;
    int strIndex  = id % 16;

    auto hrsrc = FindResourceEx(hinst, RT_STRING, MAKEINTRESOURCE(idRsrcBlk), MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT));
    if (hrsrc == nullptr)
        return boost::none;

    auto hRes = LoadResource(hinst, hrsrc);
    if (hRes == nullptr)
        return boost::none;
    LPCWSTR p = static_cast<LPCWSTR>(LockResource(hRes));
    if (p == nullptr)
        return boost::none;

    for (int i = 0; i < strIndex; ++i)
    {
        UINT length = *p++;
        p += length;
    }

    UINT cch = *p++;
    if (cch == 0)
    {
        return boost::none;
    }
    else
    {
        return std::wstring(p, cch);
    }
}

}}