dlls/ole32/ole32_main.c

   1 /*
   2  *  OLE32 Initialization
   3  *
   4  * Copyright 2000 Huw D M Davies for CodeWeavers
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include "config.h"
  22 #include "wine/port.h"
  23
  24 #include <stdarg.h>
  25 #include <stdio.h>
  26
  27 #include "windef.h"
  28 #include "winbase.h"
  29 #include "wingdi.h"
  30 #include "winuser.h"
  31 #include "winnls.h"
  32 #include "objbase.h"
  33 #include "wine/debug.h"
  34
  35 WINE_DEFAULT_DEBUG_CHANNEL(ole);
  36
  37 #define HIMETRIC_INCHES 2540
  38
  39 /***********************************************************************
  40  *              OleMetafilePictFromIconAndLabel (OLE32.@)
  41  */
  42 HGLOBAL WINAPI OleMetafilePictFromIconAndLabel(HICON hIcon, LPOLESTR lpszLabel,
  43                                                LPOLESTR lpszSourceFile, UINT iIconIndex)
  44 {
  45         METAFILEPICT mfp;
  46         HDC hdc;
  47         HGLOBAL hmem = NULL;
  48         LPVOID mfdata;
  49         static const char szIconOnly[] = "IconOnly";
  50         SIZE text_size = { 0, 0 };
  51         INT width;
  52         INT icon_width;
  53         INT icon_height;
  54         INT label_offset;
  55         HDC hdcScreen;
  56         LOGFONTW lf;
  57         HFONT font;
  58
  59         TRACE("%p %p %s %d\n", hIcon, lpszLabel, debugstr_w(lpszSourceFile), iIconIndex);
  60
  61         if( !hIcon )
  62                 return NULL;
  63
  64         if (!SystemParametersInfoW(SPI_GETICONTITLELOGFONT, sizeof(lf), &lf, 0))
  65                 return NULL;
  66
  67         font = CreateFontIndirectW(&lf);
  68         if (!font)
  69                 return NULL;
  70
  71         hdc = CreateMetaFileW(NULL);
  72         if( !hdc )
  73         {
  74                 DeleteObject(font);
  75                 return NULL;
  76         }
  77
  78         SelectObject(hdc, font);
  79
  80         ExtEscape(hdc, MFCOMMENT, sizeof(szIconOnly), szIconOnly, 0, NULL);
  81
  82         icon_width = GetSystemMetrics(SM_CXICON);
  83         icon_height = GetSystemMetrics(SM_CYICON);
  84         /* FIXME: should we give the label a bit of padding here? */
  85         label_offset = icon_height;
  86         if (lpszLabel)
  87         {
  88                 HFONT screen_old_font;
  89                 /* metafile DCs don't support GetTextExtentPoint32, so size the font
  90                  * using the desktop window DC */
  91                 hdcScreen = GetDC(NULL);
  92                 screen_old_font = SelectObject(hdcScreen, font);
  93                 GetTextExtentPoint32W(hdcScreen, lpszLabel, lstrlenW(lpszLabel), &text_size);
  94                 SelectObject(hdcScreen, screen_old_font);
  95                 ReleaseDC(NULL, hdcScreen);
  96
  97                 width = 3 * icon_width;
  98         }
  99         else
 100                 width = icon_width;
 101
 102         SetMapMode(hdc, MM_ANISOTROPIC);
 103         SetWindowOrgEx(hdc, 0, 0, NULL);
 104         SetWindowExtEx(hdc, width, label_offset + text_size.cy, NULL);
 105
 106         /* draw the icon centred */
 107         DrawIcon(hdc, (width-icon_width) / 2, 0, hIcon);
 108         if(lpszLabel)
 109                 /* draw the label centred too, if provided */
 110                 TextOutW(hdc, (width-text_size.cx) / 2, label_offset, lpszLabel, lstrlenW(lpszLabel));
 111
 112         if (lpszSourceFile)
 113         {
 114                 char szIconIndex[10];
 115                 int path_length = WideCharToMultiByte(CP_ACP,0,lpszSourceFile,-1,NULL,0,NULL,NULL);
 116                 if (path_length > 1)
 117                 {
 118                         char * szPath = CoTaskMemAlloc(path_length * sizeof(CHAR));
 119                         if (szPath)
 120                         {
 121                                 WideCharToMultiByte(CP_ACP,0,lpszSourceFile,-1,szPath,path_length,NULL,NULL);
 122                                 ExtEscape(hdc, MFCOMMENT, path_length, szPath, 0, NULL);
 123                                 CoTaskMemFree(szPath);
 124                         }
 125                 }
 126                 snprintf(szIconIndex, 10, "%u", iIconIndex);
 127                 ExtEscape(hdc, MFCOMMENT, strlen(szIconIndex)+1, szIconIndex, 0, NULL);
 128         }
 129
 130         mfp.mm = MM_ANISOTROPIC;
 131         hdcScreen = GetDC(NULL);
 132         mfp.xExt = MulDiv(width, HIMETRIC_INCHES, GetDeviceCaps(hdcScreen, LOGPIXELSX));
 133         mfp.yExt = MulDiv(label_offset + text_size.cy, HIMETRIC_INCHES, GetDeviceCaps(hdcScreen, LOGPIXELSY));
 134         ReleaseDC(NULL, hdcScreen);
 135         mfp.hMF = CloseMetaFile(hdc);
 136         DeleteObject(font);
 137         if( !mfp.hMF )
 138                 return NULL;
 139
 140         hmem = GlobalAlloc( GMEM_MOVEABLE, sizeof(mfp) );
 141         if( !hmem )
 142         {
 143                 DeleteMetaFile(mfp.hMF);
 144                 return NULL;
 145         }
 146
 147         mfdata = GlobalLock( hmem );
 148         if( !mfdata )
 149         {
 150                 GlobalFree( hmem );
 151                 DeleteMetaFile(mfp.hMF);
 152                 return NULL;
 153         }
 154
 155         memcpy(mfdata,&mfp,sizeof(mfp));
 156         GlobalUnlock( hmem );
 157
 158         TRACE("returning %p\n",hmem);
 159
 160         return hmem;
 161 }