ole32_main.c

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/*
 *  OLE32 Initialization
 *
 * Copyright 2000 Huw D M Davies for CodeWeavers
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
 */

#include "config.h"
#include "wine/port.h"

#include <stdarg.h>
#include <stdio.h>

#include "windef.h"
#include "winbase.h"
#include "wingdi.h"
#include "winuser.h"
#include "winnls.h"
#include "objbase.h"
#include "ole2.h"
#include "wine/debug.h"

WINE_DEFAULT_DEBUG_CHANNEL(ole);

#define HIMETRIC_INCHES 2540

/***********************************************************************
 *      OleMetafilePictFromIconAndLabel (OLE32.@)
 */
HGLOBAL WINAPI OleMetafilePictFromIconAndLabel(HICON hIcon, LPOLESTR lpszLabel,
                                               LPOLESTR lpszSourceFile, UINT iIconIndex)
{
    METAFILEPICT mfp;
    HDC hdc;
    HGLOBAL hmem = NULL;
    LPVOID mfdata;
    static const char szIconOnly[] = "IconOnly";
    SIZE text_size = { 0, 0 };
    INT width;
    INT icon_width;
    INT icon_height;
    INT label_offset;
    HDC hdcScreen;
    LOGFONTW lf;
    HFONT font;

    TRACE("%p %p %s %d\n", hIcon, lpszLabel, debugstr_w(lpszSourceFile), iIconIndex);

    if( !hIcon )
        return NULL;

    if (!SystemParametersInfoW(SPI_GETICONTITLELOGFONT, sizeof(lf), &lf, 0))
        return NULL;

    font = CreateFontIndirectW(&lf);
    if (!font)
        return NULL;

    hdc = CreateMetaFileW(NULL);
    if( !hdc )
    {
        DeleteObject(font);
        return NULL;
    }

    SelectObject(hdc, font);

    ExtEscape(hdc, MFCOMMENT, sizeof(szIconOnly), szIconOnly, 0, NULL);

    icon_width = GetSystemMetrics(SM_CXICON);
    icon_height = GetSystemMetrics(SM_CYICON);
    /* FIXME: should we give the label a bit of padding here? */
    label_offset = icon_height;
    if (lpszLabel)
    {
        HFONT screen_old_font;
        /* metafile DCs don't support GetTextExtentPoint32, so size the font
         * using the desktop window DC */
        hdcScreen = GetDC(NULL);
        screen_old_font = SelectObject(hdcScreen, font);
        GetTextExtentPoint32W(hdcScreen, lpszLabel, lstrlenW(lpszLabel), &text_size);
        SelectObject(hdcScreen, screen_old_font);
        ReleaseDC(NULL, hdcScreen);

        width = 3 * icon_width;
    }
    else
        width = icon_width;

    SetMapMode(hdc, MM_ANISOTROPIC);
    SetWindowOrgEx(hdc, 0, 0, NULL);
    SetWindowExtEx(hdc, width, label_offset + text_size.cy, NULL);

    /* draw the icon centered */
    DrawIcon(hdc, (width-icon_width) / 2, 0, hIcon);
    if(lpszLabel)
        /* draw the label centered too, if provided */
        TextOutW(hdc, (width-text_size.cx) / 2, label_offset, lpszLabel, lstrlenW(lpszLabel));

    if (lpszSourceFile)
    {
        char szIconIndex[10];
        int path_length = WideCharToMultiByte(CP_ACP,0,lpszSourceFile,-1,NULL,0,NULL,NULL);
        if (path_length > 1)
        {
            char * szPath = CoTaskMemAlloc(path_length * sizeof(CHAR));
            if (szPath)
            {
                WideCharToMultiByte(CP_ACP,0,lpszSourceFile,-1,szPath,path_length,NULL,NULL);
                ExtEscape(hdc, MFCOMMENT, path_length, szPath, 0, NULL);
                CoTaskMemFree(szPath);
            }
        }
        snprintf(szIconIndex, 10, "%u", iIconIndex);
        ExtEscape(hdc, MFCOMMENT, strlen(szIconIndex)+1, szIconIndex, 0, NULL);
    }

    mfp.mm = MM_ANISOTROPIC;
    hdcScreen = GetDC(NULL);
    mfp.xExt = MulDiv(width, HIMETRIC_INCHES, GetDeviceCaps(hdcScreen, LOGPIXELSX));
    mfp.yExt = MulDiv(label_offset + text_size.cy, HIMETRIC_INCHES, GetDeviceCaps(hdcScreen, LOGPIXELSY));
    ReleaseDC(NULL, hdcScreen);
    mfp.hMF = CloseMetaFile(hdc);
    DeleteObject(font);
    if( !mfp.hMF )
        return NULL;

    hmem = GlobalAlloc( GMEM_MOVEABLE, sizeof(mfp) );
    if( !hmem )
    {
        DeleteMetaFile(mfp.hMF);
        return NULL;
    }

    mfdata = GlobalLock( hmem );
    if( !mfdata )
    {
        GlobalFree( hmem );
        DeleteMetaFile(mfp.hMF);
        return NULL;
    }

    memcpy(mfdata,&mfp,sizeof(mfp));
    GlobalUnlock( hmem );

    TRACE("returning %p\n",hmem);

    return hmem;
}