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 sizeof(HANDLETABLE16) * 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 }
320
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