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 "ole2.h"
  34 #include "wine/debug.h"
  35
  36 WINE_DEFAULT_DEBUG_CHANNEL(ole);
  37
  38 #define HIMETRIC_INCHES 2540
  39
  40 /***********************************************************************
  41  *              OleMetafilePictFromIconAndLabel (OLE32.@)
  42  */
  43 HGLOBAL WINAPI OleMetafilePictFromIconAndLabel(HICON hIcon, LPOLESTR lpszLabel,
  44                                                LPOLESTR lpszSourceFile, UINT iIconIndex)
  45 {
  46         METAFILEPICT mfp;
  47         HDC hdc;
  48         HGLOBAL hmem = NULL;
  49         LPVOID mfdata;
  50         static const char szIconOnly[] = "IconOnly";
  51         SIZE text_size = { 0, 0 };
  52         INT width;
  53         INT icon_width;
  54         INT icon_height;
  55         INT label_offset;
  56         HDC hdcScreen;
  57         LOGFONTW lf;
  58         HFONT font;
  59
  60         TRACE("%p %p %s %d\n", hIcon, lpszLabel, debugstr_w(lpszSourceFile), iIconIndex);
  61
  62         if( !hIcon )
  63                 return NULL;
  64
  65         if (!SystemParametersInfoW(SPI_GETICONTITLELOGFONT, sizeof(lf), &lf, 0))
  66                 return NULL;
  67
  68         font = CreateFontIndirectW(&lf);
  69         if (!font)
  70                 return NULL;
  71
  72         hdc = CreateMetaFileW(NULL);
  73         if( !hdc )
  74         {
  75                 DeleteObject(font);
  76                 return NULL;
  77         }
  78
  79         SelectObject(hdc, font);
  80
  81         ExtEscape(hdc, MFCOMMENT, sizeof(szIconOnly), szIconOnly, 0, NULL);
  82
  83         icon_width = GetSystemMetrics(SM_CXICON);
  84         icon_height = GetSystemMetrics(SM_CYICON);
  85         /* FIXME: should we give the label a bit of padding here? */
  86         label_offset = icon_height;
  87         if (lpszLabel)
  88         {
  89                 HFONT screen_old_font;
  90                 /* metafile DCs don't support GetTextExtentPoint32, so size the font
  91                  * using the desktop window DC */
  92                 hdcScreen = GetDC(NULL);
  93                 screen_old_font = SelectObject(hdcScreen, font);
  94                 GetTextExtentPoint32W(hdcScreen, lpszLabel, lstrlenW(lpszLabel), &text_size);
  95                 SelectObject(hdcScreen, screen_old_font);
  96                 ReleaseDC(NULL, hdcScreen);
  97
  98                 width = 3 * icon_width;
  99         }
 100         else
 101                 width = icon_width;
 102
 103         SetMapMode(hdc, MM_ANISOTROPIC);
 104         SetWindowOrgEx(hdc, 0, 0, NULL);
 105         SetWindowExtEx(hdc, width, label_offset + text_size.cy, NULL);
 106
 107         /* draw the icon centred */
 108         DrawIcon(hdc, (width-icon_width) / 2, 0, hIcon);
 109         if(lpszLabel)
 110                 /* draw the label centred too, if provided */
 111                 TextOutW(hdc, (width-text_size.cx) / 2, label_offset, lpszLabel, lstrlenW(lpszLabel));
 112
 113         if (lpszSourceFile)
 114         {
 115                 char szIconIndex[10];
 116                 int path_length = WideCharToMultiByte(CP_ACP,0,lpszSourceFile,-1,NULL,0,NULL,NULL);
 117                 if (path_length > 1)
 118                 {
 119                         char * szPath = CoTaskMemAlloc(path_length * sizeof(CHAR));
 120                         if (szPath)
 121                         {
 122                                 WideCharToMultiByte(CP_ACP,0,lpszSourceFile,-1,szPath,path_length,NULL,NULL);
 123                                 ExtEscape(hdc, MFCOMMENT, path_length, szPath, 0, NULL);
 124                                 CoTaskMemFree(szPath);
 125                         }
 126                 }
 127                 snprintf(szIconIndex, 10, "%u", iIconIndex);
 128                 ExtEscape(hdc, MFCOMMENT, strlen(szIconIndex)+1, szIconIndex, 0, NULL);
 129         }
 130
 131         mfp.mm = MM_ANISOTROPIC;
 132         hdcScreen = GetDC(NULL);
 133         mfp.xExt = MulDiv(width, HIMETRIC_INCHES, GetDeviceCaps(hdcScreen, LOGPIXELSX));
 134         mfp.yExt = MulDiv(label_offset + text_size.cy, HIMETRIC_INCHES, GetDeviceCaps(hdcScreen, LOGPIXELSY));
 135         ReleaseDC(NULL, hdcScreen);
 136         mfp.hMF = CloseMetaFile(hdc);
 137         DeleteObject(font);
 138         if( !mfp.hMF )
 139                 return NULL;
 140
 141         hmem = GlobalAlloc( GMEM_MOVEABLE, sizeof(mfp) );
 142         if( !hmem )
 143         {
 144                 DeleteMetaFile(mfp.hMF);
 145                 return NULL;
 146         }
 147
 148         mfdata = GlobalLock( hmem );
 149         if( !mfdata )
 150         {
 151                 GlobalFree( hmem );
 152                 DeleteMetaFile(mfp.hMF);
 153                 return NULL;
 154         }
 155
 156         memcpy(mfdata,&mfp,sizeof(mfp));
 157         GlobalUnlock( hmem );
 158
 159         TRACE("returning %p\n",hmem);
 160
 161         return hmem;
 162 }