dll/win32/shlwapi/rosordinal.c

   1 /*
   2  * PROJECT:   ReactOS Shell
   3  * LICENSE:   GPL - See COPYING in the top level directory
   4  * PURPOSE:   Misc shell helper functions
   5  * COPYRIGHT: Copyright 2015 Giannis Adamopoulos
   6  */
   7
   8 #include "precomp.h"
   9
  10 /* http://undoc.airesoft.co.uk/shlwapi.dll/SHForwardContextMenuMsg.php */
  11 HRESULT WINAPI SHForwardContextMenuMsg(IUnknown* pUnk, UINT uMsg, WPARAM wParam,
  12                                        LPARAM lParam, LRESULT* pResult, BOOL useIContextMenu2)
  13 {
  14     HRESULT hr;
  15     IContextMenu3* pcmenu3;
  16     IContextMenu2* pcmenu2;
  17
  18     /* First try to use the IContextMenu3 interface */
  19     hr = IUnknown_QueryInterface(pUnk, &IID_IContextMenu3, (void**)&pcmenu3);
  20     if (SUCCEEDED(hr))
  21     {
  22         hr = IContextMenu3_HandleMenuMsg2(pcmenu3, uMsg, wParam, lParam, pResult);
  23         IContextMenu3_Release(pcmenu3);
  24         return hr;
  25     }
  26
  27     /* Return failure if we can't use the IContextMenu2 interface */
  28     if(!useIContextMenu2)
  29         return hr;
  30
  31     /* Now try to use the IContextMenu2 interface */
  32     hr = IUnknown_QueryInterface(pUnk, &IID_IContextMenu2, (void**)&pcmenu2);
  33     if (FAILED(hr))
  34         return hr;
  35
  36     hr = IContextMenu2_HandleMenuMsg(pcmenu2, uMsg, wParam, lParam);
  37     IContextMenu2_Release(pcmenu2);
  38     return hr;
  39 }
  40
  41 /* http://undoc.airesoft.co.uk/shlwapi.dll/SHAreIconsEqual.php */
  42
  43 BOOL WINAPI SHAreIconsEqual(HICON hIcon1, HICON hIcon2)
  44 {
  45     ICONINFO iconInfo1, iconInfo2;
  46     BITMAP bm1, bm2;
  47     BOOL bSame = FALSE;
  48
  49     if (!hIcon1 || !hIcon2)
  50         return FALSE;
  51
  52     if (!GetIconInfo(hIcon1, &iconInfo1))
  53         return FALSE;
  54
  55     if (!GetIconInfo(hIcon2, &iconInfo2))
  56     {
  57         DeleteObject(iconInfo1.hbmColor);
  58         DeleteObject(iconInfo1.hbmMask);
  59         return FALSE;
  60     }
  61
  62     GetObjectW(iconInfo1.hbmColor, sizeof(bm1), &bm1);
  63     GetObjectW(iconInfo2.hbmColor, sizeof(bm2), &bm2);
  64
  65     if (bm1.bmWidth == bm2.bmWidth && bm1.bmHeight == bm2.bmHeight)
  66     {
  67         BITMAPINFO bmi = { { sizeof(bmi), bm1.bmWidth, bm1.bmHeight, 1, 32 } };
  68         HDC hdc = GetDC(0);
  69         SIZE_T size = bm1.bmWidth * bm1.bmHeight * 4;
  70         BYTE *data1, *data2;
  71
  72         data1 = HeapAlloc(GetProcessHeap(), 0, size);
  73         data2 = HeapAlloc(GetProcessHeap(), 0, size);
  74
  75         if (data1 && data2)
  76         {
  77             if (GetDIBits(hdc, iconInfo1.hbmColor, 0, bm1.bmHeight, data1, &bmi, DIB_RGB_COLORS) &&
  78                 GetDIBits(hdc, iconInfo2.hbmColor, 0, bm2.bmHeight, data2, &bmi, DIB_RGB_COLORS))
  79             {
  80                 bSame = memcmp(data1, data2, size) == 0;
  81             }
  82         }
  83         HeapFree(GetProcessHeap(), 0, data1);
  84         HeapFree(GetProcessHeap(), 0, data2);
  85
  86         ReleaseDC(NULL, hdc);
  87     }
  88
  89     DeleteObject(iconInfo1.hbmColor);
  90     DeleteObject(iconInfo1.hbmMask);
  91
  92     DeleteObject(iconInfo2.hbmColor);
  93     DeleteObject(iconInfo2.hbmMask);
  94
  95     return bSame;
  96 }