dlls/gdi.exe16/metafile.c

   1 /*
   2  * Metafile functions
   3  *
   4  * Copyright  David W. Metcalfe, 1994
   5  * Copyright  Niels de Carpentier, 1996
   6  * Copyright  Albrecht Kleine, 1996
   7  * Copyright  Huw Davies, 1996
   8  *
   9  * This library is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2.1 of the License, or (at your option) any later version.
  13  *
  14  * This library is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with this library; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  22  */
  23
  24 #include "config.h"
  25
  26 #include <string.h>
  27 #include <fcntl.h>
  28
  29 #include "wine/winbase16.h"
  30 #include "wine/wingdi16.h"
  31 #include "wownt32.h"
  32 #include "winreg.h"
  33 #include "wine/debug.h"
  34
  35 WINE_DEFAULT_DEBUG_CHANNEL(metafile);
  36
  37 #define METAFILE_MEMORY 1
  38 #define METAFILE_DISK   2
  39 #define MFHEADERSIZE (sizeof(METAHEADER))
  40 #define MFVERSION 0x300
  41
  42 /******************************************************************
  43  *         MF_GetMetaHeader16
  44  *
  45  * Returns ptr to METAHEADER associated with HMETAFILE16
  46  * Should be followed by call to MF_ReleaseMetaHeader16
  47  */
  48 static METAHEADER *MF_GetMetaHeader16( HMETAFILE16 hmf )
  49 {
  50     return GlobalLock16(hmf);
  51 }
  52
  53 /******************************************************************
  54  *         MF_ReleaseMetaHeader16
  55  *
  56  * Releases METAHEADER associated with HMETAFILE16
  57  */
  58 static BOOL16 MF_ReleaseMetaHeader16( HMETAFILE16 hmf )
  59 {
  60     return GlobalUnlock16( hmf );
  61 }
  62
  63 /******************************************************************
  64  *         create_metafile16
  65  *
  66  * Create a 16-bit metafile from a 32-bit one. The 32-bit one is deleted.
  67  */
  68 static HMETAFILE16 create_metafile16( HMETAFILE hmf )
  69 {
  70     UINT size;
  71     HMETAFILE16 hmf16;
  72
  73     if (!hmf) return 0;
  74     size = GetMetaFileBitsEx( hmf, 0, NULL );
  75     hmf16 = GlobalAlloc16( GMEM_MOVEABLE, size );
  76     if (hmf16)
  77     {
  78         void *buffer = GlobalLock16( hmf16 );
  79         GetMetaFileBitsEx( hmf, size, buffer );
  80         GlobalUnlock16( hmf16 );
  81     }
  82     DeleteMetaFile( hmf );
  83     return hmf16;
  84 }
  85
  86 /******************************************************************
  87  *         create_metafile32
  88  *
  89  * Create a 32-bit metafile from a 16-bit one.
  90  */
  91 static HMETAFILE create_metafile32( HMETAFILE16 hmf16 )
  92 {
  93     METAHEADER *mh = MF_GetMetaHeader16( hmf16 );
  94     if (!mh) return 0;
  95     return SetMetaFileBitsEx( mh->mtSize * 2, (BYTE *)mh );
  96 }
  97
  98 /**********************************************************************
  99  *           CreateMetaFile     (GDI.125)
 100  */
 101 HDC16 WINAPI CreateMetaFile16( LPCSTR filename )
 102 {
 103     return HDC_16( CreateMetaFileA( filename ) );
 104 }
 105
 106 /******************************************************************
 107  *           CloseMetaFile     (GDI.126)
 108  */
 109 HMETAFILE16 WINAPI CloseMetaFile16(HDC16 hdc)
 110 {
 111     return create_metafile16( CloseMetaFile( HDC_32(hdc) ));
 112 }
 113
 114 /******************************************************************
 115  *           DeleteMetaFile   (GDI.127)
 116  */
 117 BOOL16 WINAPI DeleteMetaFile16(  HMETAFILE16 hmf )
 118 {
 119     return !GlobalFree16( hmf );
 120 }
 121
 122 /******************************************************************
 123  *         GetMetaFile   (GDI.124)
 124  */
 125 HMETAFILE16 WINAPI GetMetaFile16( LPCSTR lpFilename )
 126 {
 127     return create_metafile16( GetMetaFileA( lpFilename ));
 128 }
 129
 130 /******************************************************************
 131  *         CopyMetaFile   (GDI.151)
 132  */
 133 HMETAFILE16 WINAPI CopyMetaFile16( HMETAFILE16 hSrcMetaFile, LPCSTR lpFilename)
 134 {
 135     HMETAFILE hmf = create_metafile32( hSrcMetaFile );
 136     HMETAFILE hmf2 = CopyMetaFileA( hmf, lpFilename );
 137     DeleteMetaFile( hmf );
 138     return create_metafile16( hmf2 );
 139 }
 140
 141 /******************************************************************
 142  *         IsValidMetaFile   (GDI.410)
 143  *
 144  *  Attempts to check if a given metafile is correctly formatted.
 145  *  Currently, the only things verified are several properties of the
 146  *  header.
 147  *
 148  * RETURNS
 149  *  TRUE if hmf passes some tests for being a valid metafile, FALSE otherwise.
 150  *
 151  * BUGS
 152  *  This is not exactly what windows does, see _Undocumented_Windows_
 153  *  for details.
 154  */
 155 BOOL16 WINAPI IsValidMetaFile16(HMETAFILE16 hmf)
 156 {
 157     BOOL16 res=FALSE;
 158     METAHEADER *mh = MF_GetMetaHeader16(hmf);
 159     if (mh) {
 160         if (mh->mtType == METAFILE_MEMORY || mh->mtType == METAFILE_DISK)
 161             if (mh->mtHeaderSize == MFHEADERSIZE/sizeof(INT16))
 162                 if (mh->mtVersion == MFVERSION)
 163                     res=TRUE;
 164         MF_ReleaseMetaHeader16(hmf);
 165     }
 166     TRACE("IsValidMetaFile %x => %d\n",hmf,res);
 167     return res;
 168 }
 169
 170 /******************************************************************
 171  *         PlayMetaFile   (GDI.123)
 172  *
 173  */
 174 BOOL16 WINAPI PlayMetaFile16( HDC16 hdc, HMETAFILE16 hmf16 )
 175 {
 176     HMETAFILE hmf = create_metafile32( hmf16 );
 177     BOOL ret = PlayMetaFile( HDC_32(hdc), hmf );
 178     DeleteMetaFile( hmf );
 179     return ret;
 180 }
 181
 182
 183 /******************************************************************
 184  *            EnumMetaFile   (GDI.175)
 185  *
 186  */
 187 BOOL16 WINAPI EnumMetaFile16( HDC16 hdc16, HMETAFILE16 hmf,
 188                               MFENUMPROC16 lpEnumFunc, LPARAM lpData )
 189 {
 190     METAHEADER *mh = MF_GetMetaHeader16(hmf);
 191     METARECORD *mr;
 192     HANDLETABLE16 *ht;
 193     HDC hdc = HDC_32(hdc16);
 194     HGLOBAL16 hHT;
 195     SEGPTR spht;
 196     unsigned int offset = 0;
 197     WORD i, seg;
 198     HPEN hPen;
 199     HBRUSH hBrush;
 200     HFONT hFont;
 201     WORD args[8];
 202     BOOL16 result = TRUE;
 203
 204     TRACE("(%p, %04x, %p, %08lx)\n", hdc, hmf, lpEnumFunc, lpData);
 205
 206     if(!mh) return FALSE;
 207
 208     /* save the current pen, brush and font */
 209     hPen = GetCurrentObject(hdc, OBJ_PEN);
 210     hBrush = GetCurrentObject(hdc, OBJ_BRUSH);
 211     hFont = GetCurrentObject(hdc, OBJ_FONT);
 212
 213     /* create the handle table */
 214
 215     hHT = GlobalAlloc16(GMEM_MOVEABLE | GMEM_ZEROINIT,
 216             FIELD_OFFSET(HANDLETABLE16, objectHandle[mh->mtNoObjects]));
 217     spht = WOWGlobalLock16(hHT);
 218
 219     seg = hmf | 7;
 220     offset = mh->mtHeaderSize * 2;
 221
 222     /* loop through metafile records */
 223
 224     args[7] = hdc16;
 225     args[6] = SELECTOROF(spht);
 226     args[5] = OFFSETOF(spht);
 227     args[4] = seg + (HIWORD(offset) << __AHSHIFT);
 228     args[3] = LOWORD(offset);
 229     args[2] = mh->mtNoObjects;
 230     args[1] = HIWORD(lpData);
 231     args[0] = LOWORD(lpData);
 232
 233     while (offset < (mh->mtSize * 2))
 234     {
 235         DWORD ret;
 236
 237         mr = (METARECORD *)((char *)mh + offset);
 238
 239         WOWCallback16Ex( (DWORD)lpEnumFunc, WCB16_PASCAL, sizeof(args), args, &ret );
 240         if (!LOWORD(ret))
 241         {
 242             result = FALSE;
 243             break;
 244         }
 245
 246         offset += (mr->rdSize * 2);
 247         args[4] = seg + (HIWORD(offset) << __AHSHIFT);
 248         args[3] = LOWORD(offset);
 249     }
 250
 251     SelectObject(hdc, hBrush);
 252     SelectObject(hdc, hPen);
 253     SelectObject(hdc, hFont);
 254
 255     ht = GlobalLock16(hHT);
 256
 257     /* free objects in handle table */
 258     for(i = 0; i < mh->mtNoObjects; i++)
 259       if(*(ht->objectHandle + i) != 0)
 260         DeleteObject( (HGDIOBJ)(ULONG_PTR)(*(ht->objectHandle + i) ));
 261
 262     /* free handle table */
 263     GlobalFree16(hHT);
 264     MF_ReleaseMetaHeader16(hmf);
 265     return result;
 266 }
 267
 268 /******************************************************************
 269  *         GetMetaFileBits   (GDI.159)
 270  *
 271  * Trade in a metafile object handle for a handle to the metafile memory.
 272  *
 273  * PARAMS
 274  *  hmf [I] metafile handle
 275  */
 276
 277 HGLOBAL16 WINAPI GetMetaFileBits16( HMETAFILE16 hmf )
 278 {
 279     TRACE("hMem out: %04x\n", hmf);
 280     return hmf;
 281 }
 282
 283 /******************************************************************
 284  *         SetMetaFileBits   (GDI.160)
 285  *
 286  * Trade in a metafile memory handle for a handle to a metafile object.
 287  * The memory region should hold a proper metafile, otherwise
 288  * problems will occur when it is used. Validity of the memory is not
 289  * checked. The function is essentially just the identity function.
 290  *
 291  * PARAMS
 292  *  hMem [I] handle to a memory region holding a metafile
 293  *
 294  * RETURNS
 295  *  Handle to a metafile on success, NULL on failure..
 296  */
 297 HMETAFILE16 WINAPI SetMetaFileBits16( HGLOBAL16 hMem )
 298 {
 299     TRACE("hmf out: %04x\n", hMem);
 300
 301     return hMem;
 302 }
 303
 304 /******************************************************************
 305  *         SetMetaFileBitsBetter   (GDI.196)
 306  *
 307  * Trade in a metafile memory handle for a handle to a metafile object,
 308  * making a cursory check (using IsValidMetaFile()) that the memory
 309  * handle points to a valid metafile.
 310  *
 311  * RETURNS
 312  *  Handle to a metafile on success, NULL on failure..
 313  */
 314 HMETAFILE16 WINAPI SetMetaFileBitsBetter16( HMETAFILE16 hMeta )
 315 {
 316     if( IsValidMetaFile16( hMeta ) )
 317         return GlobalReAlloc16( hMeta, 0, GMEM_SHARE | GMEM_NODISCARD | GMEM_MODIFY);
 318     return 0;
 319 }