1 /*****************************************************************************
2 * utils.cpp: ActiveX control for VLC
3 *****************************************************************************
4 * Copyright (C) 2005 the VideoLAN team
6 * Authors: Damien Fouilleul <Damien.Fouilleul@laposte.net>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
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.
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, USA.
21 *****************************************************************************/
26 ** conversion facilities
31 char *CStrFromBSTR(UINT codePage, BSTR bstr)
33 UINT len = SysStringLen(bstr);
36 size_t mblen = WideCharToMultiByte(codePage,
37 0, bstr, len, NULL, 0, NULL, NULL);
40 char *buffer = (char *)CoTaskMemAlloc(mblen+1);
41 ZeroMemory(buffer, mblen+1);
42 if( WideCharToMultiByte(codePage, 0, bstr, len, buffer, mblen, NULL, NULL) )
52 BSTR BSTRFromCStr(UINT codePage, LPCSTR s)
54 int wideLen = MultiByteToWideChar(codePage, 0, s, -1, NULL, 0);
57 WCHAR* wideStr = (WCHAR*)CoTaskMemAlloc(wideLen*sizeof(WCHAR));
62 ZeroMemory(wideStr, wideLen*sizeof(WCHAR));
63 MultiByteToWideChar(codePage, 0, s, -1, wideStr, wideLen);
64 bstr = SysAllocStringLen(wideStr, wideLen);
77 HRESULT GetObjectProperty(LPUNKNOWN object, DISPID dispID, VARIANT& v)
80 HRESULT hr = object->QueryInterface(IID_IDispatch, (LPVOID *)&pDisp);
83 DISPPARAMS dispparamsNoArgs = {NULL, NULL, 0, 0};
85 hr = pDisp->Invoke(dispID, IID_NULL, LOCALE_USER_DEFAULT,
86 DISPATCH_PROPERTYGET, &dispparamsNoArgs, &vres, NULL, NULL);
89 if( V_VT(&v) != V_VT(&vres) )
91 hr = VariantChangeType(&v, &vres, 0, V_VT(&v));
104 HDC CreateDevDC(DVTARGETDEVICE *ptd)
107 LPDEVNAMES lpDevNames;
109 LPTSTR lpszDriverName;
110 LPTSTR lpszDeviceName;
114 hdc = CreateDC(TEXT("DISPLAY"), NULL, NULL, NULL);
118 lpDevNames = (LPDEVNAMES) ptd; // offset for size field
120 if (ptd->tdExtDevmodeOffset == 0) {
123 lpDevMode = (LPDEVMODE) ((LPTSTR)ptd + ptd->tdExtDevmodeOffset);
126 lpszDriverName = (LPTSTR) lpDevNames + ptd->tdDriverNameOffset;
127 lpszDeviceName = (LPTSTR) lpDevNames + ptd->tdDeviceNameOffset;
128 lpszPortName = (LPTSTR) lpDevNames + ptd->tdPortNameOffset;
130 hdc = CreateDC(lpszDriverName, lpszDeviceName, lpszPortName, lpDevMode);
136 #define HIMETRIC_PER_INCH 2540
138 void DPFromHimetric(HDC hdc, LPPOINT pt, int count)
140 LONG lpX = GetDeviceCaps(hdc, LOGPIXELSX);
141 LONG lpY = GetDeviceCaps(hdc, LOGPIXELSY);
144 pt->x = pt->x*lpX/HIMETRIC_PER_INCH;
145 pt->y = pt->y*lpY/HIMETRIC_PER_INCH;
150 void HimetricFromDP(HDC hdc, LPPOINT pt, int count)
152 LONG lpX = GetDeviceCaps(hdc, LOGPIXELSX);
153 LONG lpY = GetDeviceCaps(hdc, LOGPIXELSY);
156 pt->x = pt->x*HIMETRIC_PER_INCH/lpX;
157 pt->y = pt->y*HIMETRIC_PER_INCH/lpY;