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 <stdarg.h>
  22 #include <stdio.h>
  23
  24 #include "windef.h"
  25 #include "winbase.h"
  26 #include "wingdi.h"
  27 #include "winuser.h"
  28 #include "winnls.h"
  29 #include "objbase.h"
  30 #include "wine/debug.h"
  31
  32 WINE_DEFAULT_DEBUG_CHANNEL(ole);
  33
  34 #define HIMETRIC_INCHES 2540
  35
  36 /***********************************************************************
  37  *              OleMetafilePictFromIconAndLabel (OLE32.@)
  38  */
  39 HGLOBAL WINAPI OleMetafilePictFromIconAndLabel(HICON hIcon, LPOLESTR lpszLabel,
  40                                                LPOLESTR lpszSourceFile, UINT iIconIndex)
  41 {
  42         METAFILEPICT mfp;
  43         HDC hdc;
  44         HGLOBAL hmem = NULL;
  45         LPVOID mfdata;
  46         static const char szIconOnly[] = "IconOnly";
  47         SIZE text_size = { 0, 0 };
  48         INT width;
  49         INT icon_width;
  50         INT icon_height;
  51         INT label_offset;
  52         HDC hdcScreen;
  53         LOGFONTW lf;
  54         HFONT font;
  55
  56         TRACE("%p %p %s %d\n", hIcon, lpszLabel, debugstr_w(lpszSourceFile), iIconIndex);
  57
  58         if( !hIcon )
  59                 return NULL;
  60
  61         if (!SystemParametersInfoW(SPI_GETICONTITLELOGFONT, sizeof(lf), &lf, 0))
  62                 return NULL;
  63
  64         font = CreateFontIndirectW(&lf);
  65         if (!font)
  66                 return NULL;
  67
  68         hdc = CreateMetaFileW(NULL);
  69         if( !hdc )
  70         {
  71                 DeleteObject(font);
  72                 return NULL;
  73         }
  74
  75         SelectObject(hdc, font);
  76
  77         ExtEscape(hdc, MFCOMMENT, sizeof(szIconOnly), szIconOnly, 0, NULL);
  78
  79         icon_width = GetSystemMetrics(SM_CXICON);
  80         icon_height = GetSystemMetrics(SM_CYICON);
  81         /* FIXME: should we give the label a bit of padding here? */
  82         label_offset = icon_height;
  83         if (lpszLabel)
  84         {
  85                 HFONT screen_old_font;
  86                 /* metafile DCs don't support GetTextExtentPoint32, so size the font
  87                  * using the desktop window DC */
  88                 hdcScreen = GetDC(NULL);
  89                 screen_old_font = SelectObject(hdcScreen, font);
  90                 GetTextExtentPoint32W(hdcScreen, lpszLabel, lstrlenW(lpszLabel), &text_size);
  91                 SelectObject(hdcScreen, screen_old_font);
  92                 ReleaseDC(NULL, hdcScreen);
  93
  94                 width = 3 * icon_width;
  95         }
  96         else
  97                 width = icon_width;
  98
  99         SetMapMode(hdc, MM_ANISOTROPIC);
 100         SetWindowOrgEx(hdc, 0, 0, NULL);
 101         SetWindowExtEx(hdc, width, label_offset + text_size.cy, NULL);
 102
 103         /* draw the icon centred */
 104         DrawIcon(hdc, (width-icon_width) / 2, 0, hIcon);
 105         if(lpszLabel)
 106                 /* draw the label centred too, if provided */
 107                 TextOutW(hdc, (width-text_size.cx) / 2, label_offset, lpszLabel, lstrlenW(lpszLabel));
 108
 109         if (lpszSourceFile)
 110         {
 111                 char szIconIndex[10];
 112                 int path_length = WideCharToMultiByte(CP_ACP,0,lpszSourceFile,-1,NULL,0,NULL,NULL);
 113                 if (path_length > 1)
 114                 {
 115                         char * szPath = CoTaskMemAlloc(path_length * sizeof(CHAR));
 116                         if (szPath)
 117                         {
 118                                 WideCharToMultiByte(CP_ACP,0,lpszSourceFile,-1,szPath,path_length,NULL,NULL);
 119                                 ExtEscape(hdc, MFCOMMENT, path_length, szPath, 0, NULL);
 120                                 CoTaskMemFree(szPath);
 121                         }
 122                 }
 123                 snprintf(szIconIndex, 10, "%u", iIconIndex);
 124                 ExtEscape(hdc, MFCOMMENT, strlen(szIconIndex)+1, szIconIndex, 0, NULL);
 125         }
 126
 127         mfp.mm = MM_ANISOTROPIC;
 128         hdcScreen = GetDC(NULL);
 129         mfp.xExt = MulDiv(width, HIMETRIC_INCHES, GetDeviceCaps(hdcScreen, LOGPIXELSX));
 130         mfp.yExt = MulDiv(label_offset + text_size.cy, HIMETRIC_INCHES, GetDeviceCaps(hdcScreen, LOGPIXELSY));
 131         ReleaseDC(NULL, hdcScreen);
 132         mfp.hMF = CloseMetaFile(hdc);
 133         DeleteObject(font);
 134         if( !mfp.hMF )
 135                 return NULL;
 136
 137         hmem = GlobalAlloc( GMEM_MOVEABLE, sizeof(mfp) );
 138         if( !hmem )
 139         {
 140                 DeleteMetaFile(mfp.hMF);
 141                 return NULL;
 142         }
 143
 144         mfdata = GlobalLock( hmem );
 145         if( !mfdata )
 146         {
 147                 GlobalFree( hmem );
 148                 DeleteMetaFile(mfp.hMF);
 149                 return NULL;
 150         }
 151
 152         memcpy(mfdata,&mfp,sizeof(mfp));
 153         GlobalUnlock( hmem );
 154
 155         TRACE("returning %p\n",hmem);
 156
 157         return hmem;
 158 }