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1 This document should help new developers get started. Like all of Wine, it
2 is a work in progress.
5 SOURCE TREE STRUCTURE
6 =====================
8 The Wine source tree is loosely based on the original Windows modules.
9 Most of the source is concerned with implementing the Wine API, although
10 there are also various tools, documentation, sample Winelib code, and
11 code specific to the binary loader. Note that several of the libraries
12 listed here are "stubbed out", meaning they still need to be implemented.
14 DLLs (under dlls/):
15 -------------------
17 advapi32/ - Crypto, systeminfo, security, eventlogging
18 amstream/ - MultiMedia Streams
19 atl - Active Template Library
20 avicap32/ - AVI capture window class
21 avifil32/ - COM object to play AVI files
22 cabinet/ - Cabinet file interface
23 capi2032/ - Wrapper library for CAPI4Linux access
24 cards/ - Card graphics
25 cfgmgr32/ - Config manager
26 comcat/ - Component category manager
27 comctl32/ - Common controls
28 commdlg/ - Common dialog boxes (both 16 & 32 bit)
29 crtdll/ - Old C runtime library
30 crypt32/ - Cryptography
31 ctl3d/ - 3D Effects for Common GUI Components
32 d3d8/ - Direct3D (3D graphics)
33 d3d9/ - Direct3D (3D graphics)
34 d3dim/ - Direct3D Immediate Mode
35 d3drm/ - Direct3D Retained Mode
36 d3dx8/ - Direct3D (3D graphics)
37 d3dxof/ - DirectX Files Functions
38 dbghelp/ - Engine for symbol and module enumeration
39 dciman32/ - DCI Manager (graphics)
40 ddraw/ - DirectDraw (graphics)
41 devenum/ - Device enumeration (part of DirectShow)
42 dinput/ - DirectInput (device input)
43 dinput8/ - DirectInput (device input)
44 dmband/ - DirectMusic Band
45 dmcompos/ - DirectMusic Composer
46 dmime/ - DirectMusic Interactive Engine
47 dmloader/ - DirectMusic Loader
48 dmscript/ - DirectMusic Scripting
49 dmstyle/ - DirectMusic Style Engine
50 dmsynth/ - DirectMusic Software Synthesizer
51 dmusic/ - DirectMusic Core Services
52 dmusic32/ - DirectMusic Legacy Port
53 dplay/ - DirectPlay (networking)
54 dplayx/ - DirectPlay (networking)
55 dpnet/ - DirectPlay (networking)
56 dpnhpast/ - DirectPlay NAT Helper PAST
57 dsound/ - DirectSound (audio)
58 dswave/ - DirectMusic Wave
59 dxdiagn/ - DirectX Diagnostic Tool
60 gdi/ - GDI (graphics)
61 glu32/ - OpenGL Utility library (graphics)
62 glut32/ - OpenGL Utility Toolkit
63 hhctrl.ocx/ - HHCTRL OCX implementation
64 iccvid/ - Radius Cinepak Video Decoder
65 icmp/ - ICMP protocol (networking)
66 ifsmgr.vxd/ - IFSMGR VxD implementation
67 imagehlp/ - PE (Portable Executable) Image Helper lib
68 imm32/ - Input Method Manager
69 iphlpapi/ - IP Helper API
70 kernel/ - The Windows kernel
71 lzexpand/ - Lempel-Ziv compression/decompression
72 mapi32/ - Mail interface
73 mlang/ - Multi Language Support
74 mmdevldr.vxd/ - MMDEVLDR VxD implementation
75 monodebg.vxd/ - MONODEBG VxD implementation
76 mpr/ - Multi-Protocol Router (networking)
77 msacm/ - Audio Compression Manager (multimedia)
78 msacm/imaadp32/ - IMA ADPCM Audio Codec
79 msacm/msadp32/ - MS ADPCM Audio Codec
80 msacm/msg711/ - MS G711 Audio Codec (includes A-Law & MU-Law)
81 msacm/winemp3/ - Mpeg Layer 3 Audio Codec
82 msdmo/ - DirectX Media Objects
83 mshtml/ - MS HTML component
84 msi/ - Microsoft Installer
85 msimg32/ - Gradient and transparency (graphics)
86 msisys/ - System information
87 msnet32/ - Network interface
88 msrle32/ - Video codecs
89 msvcrt/ - C runtime library
90 msvcrt20/ - C runtime library version 2.0
91 msvcrt40/ - C runtime library version 4.0
92 msvcrtd/ - C runtime library debugging
93 msvidc32/ - Microsoft Video-1 Decoder
94 msvideo/ - 16 bit video manager
95 mswsock/ - Misc networking
96 netapi32/ - Network interface
97 newdev/ - New Hardware Device Library
98 ntdll/ - NT implementation of kernel calls
99 odbc32/ - Open DataBase Connectivity driver manager
100 ole32/ - 32 bit OLE 2.0 libraries
101 oleacc/ - OLE accessibility support
102 oleaut32/ - 32 bit OLE 2.0 automation
103 olecli/ - 16 bit OLE client
104 oledlg/ - OLE 2.0 user interface support
105 olepro32/ - 32 bit OLE 2.0 automation
106 olesvr/ - 16 bit OLE server
107 opengl32/ - OpenGL implementation (graphics)
108 psapi/ - Process Status interface
109 qcap/ - DirectShow runtime
110 quartz/ - DirectShow runtime
111 rasapi32/ - Remote Access Server interface
112 richedit/ - Rich text editing control
113 rpcrt4/ - Remote Procedure Call runtime
114 rsabase/ - RSA encryption
115 secur32/ - Contains Windows Security functions
116 serialui/ - Serial port property pages
117 setupapi/ - Setup interface
118 setupx/ - Contains functions used by the Windows Setup
119 shdocvw/ - Shell document object and control
120 shell32/ - COM object implementing shell views
121 shfolder/ - Shell folder service
122 shlwapi/ - Shell Light-Weight interface
123 snmpapi/ - SNMP protocol interface (networking)
124 sti/ - Still Image service
125 tapi32/ - Telephone interface
126 ttydrv/ - TTY display driver (Wine specific)
127 twain/ - TWAIN Imaging device communications
128 unicows/ - Unicows replacement (Unicode layer for Win9x)
129 url/ - Internet shortcut shell extension
130 urlmon/ - URL Moniker allows binding to a URL (like KIO/gnome-vfs)
131 user/ - Window management, standard controls, etc.
132 uxtheme/ - Theme library
133 vdhcp.vxd/ - VDHCP VxD implementation
134 vdmdbg/ - Virtual DOS machine debug library
135 version/ - File installation library
136 vmm.vxd/ - VMM VxD implementation
137 vnbt.vxd/ - VNBT VxD implementation
138 vnetbios.vxd/ - VNETBIOS VxD implementation
139 vtdapi.vxd/ - VTDAPI VxD implementation
140 vwin32.vxd/ - VWIN32 VxD implementation
141 win32s/ - 32-bit function access for 16-bit systems
142 winaspi/ - 16 bit Advanced SCSI Peripheral Interface
143 wined3d/ - Wine internal Direct3D helper
144 winedos/ - DOS features and BIOS calls (interrupts) (wine specific)
145 wineps/ - Postscript driver (Wine specific)
146 wininet/ - Internet extensions
147 winmm/ - Multimedia (16 & 32 bit)
148 winmm/joystick/ - Joystick driver
149 winmm/mcianim/ - MCI animation driver
150 winmm/mciavi/ - MCI video driver
151 winmm/mcicda/ - MCI audio CD driver
152 winmm/mciseq/ - MCI MIDI driver
153 winmm/mciwave/ - MCI wave driver
154 winmm/midimap/ - MIDI mapper
155 winmm/wavemap/ - Audio mapper
156 winmm/winealsa/ - ALSA audio driver
157 winmm/winearts/ - aRts audio driver
158 winmm/wineaudioio/ - audioio audio driver
159 winmm/winejack/ - JACK audio server driver
160 winmm/winenas/ - NAS audio driver
161 winmm/wineoss/ - OSS audio driver
162 winnls/ - National Language Support
163 winsock/ - Sockets 2.0 (networking)
164 winspool/ - Printing & Print Spooler
165 wintab32/ - Tablet device interface
166 wintrust/ - Trust verification interface
167 wow32/ - WOW subsystem
168 wsock32/ - Sockets 1.1 (networking)
169 x11drv/ - X11 display driver (Wine specific)
171 Winelib programs (under programs/):
172 -----------------------------------
174 avitools/ - AVI information viewer and player
175 clock/ - Graphical clock
176 cmdlgtst/ - Common dialog tests
177 control/ - Control panel
178 expand/ - Decompress Lempel-Ziv compressed archive
179 msiexec/ - Microsoft Installer frontend
180 notepad/ - Notepad replacement
181 progman/ - Program manager
182 regedit/ - Registry editor
183 regsvr32/ - Register COM server
184 rpcss/ - RPC services
185 rundll32/ - Execute DLL functions directly
186 start/ - Replacement for start.exe
187 taskmgr/ - Manage running Windows/Winelib applications
188 uninstaller/ - Remove installed programs
189 view/ - Metafile viewer
190 wcmd/ - Command line interface
191 wineboot/ - Wine bootstrap process
192 winecfg/ - Wine configuration utility
193 wineconsole/ - Console
194 winedbg/ - Debugger
195 winefile/ - File manager
196 winemenubuilder/ - Helper program for building Unix menu entries
197 winemine/ - Mine game
198 winepath/ - Translate between Wine and Unix paths
199 winetest/ - Wine testing shell
200 winevdm/ - Wine virtual DOS machine
201 winhelp/ - Help viewer
202 winver/ - Windows Version Program
205 Support programs, libraries, etc:
206 ---------------------------------
208 dlls/dxerr8/ - DirectX 8 error import lib
209 dlls/dxerr9/ - DirectX 9 error import lib
210 dlls/dxguid/ - DirectX UUID import lib
211 dlls/uuid/ - Windows-compatible UUID import lib
212 documentation/ - some documentation
213 documentation/samples/ - sample configuration files
214 include/ - Windows standard includes
215 include/msvcrt/ - MSVC compatible libc headers
216 include/wine/ - Wine specific headers
217 libs/ - the Wine libraries
218 libs/port/ - portability library
219 libs/unicode/ - Unicode support shared
220 libs/wine/ - Wine bootstrap library
221 libs/wpp/ - C preprocessor
222 loader/ - the main Wine loader
223 server/ - the Wine server
224 tools/ - various tools used to build/check Wine
225 tools/widl/ - the IDL compiler
226 tools/winapi{,_check}/ - A Win32 API checker
227 tools/winebuild/ - Wine build tool
228 tools/winedump/ - a .DLL dump utility
229 tools/winegcc/ - a MinGW command line compatible gcc wrapper
230 tools/wmc/ - the message compiler
231 tools/wpp/ - the C pre-processor library
232 tools/wrc/ - the resource compiler
235 Miscellaneous:
236 --------------
238 Note: these directories will ultimately get moved into their
239 respective dlls.
241 misc/ - KERNEL registry
242 controls/ - USER built-in widgets
243 windows/ - USER window management
247 IMPLEMENTING NEW API CALLS
248 ==========================
250 This is the simple version, and covers only Win32. Win16 is slightly
251 uglier, because of the Pascal heritage and the segmented memory model.
253 All of the Win32 APIs known to Wine are listed in the .spec file of
254 their corresponding dll. An unimplemented call will look like (from
255 gdi32.spec)
256 269 stub PolyBezierTo
257 To implement this call, you need to do the following four things.
259 1. Find the appropriate parameters for the call, and add a prototype to
260 the correct header file. In this case, that means [include/wingdi.h],
261 and it might look like
262 BOOL WINAPI PolyBezierTo(HDC, LPCVOID, DWORD);
263 If the function has both an ASCII and a Unicode version, you need to
264 define both and add a #define WINELIB_NAME_AW declaration. See below
265 for discussion of function naming conventions.
267 2. Modify the .spec file to tell Wine that the function has an
268 implementation, what the parameters look like and what Wine function
269 to use for the implementation. In Win32, things are simple--everything
270 is 32-bits. However, the relay code handles pointers and pointers to
271 strings slightly differently, so you should use 'str' and 'wstr' for
272 strings, 'ptr' for other pointer types, and 'long' for everything else.
273 269 stdcall PolyBezierTo(long ptr long) PolyBezierTo
274 The 'PolyBezierTo' at the end of the line is which Wine function to use
275 for the implementation.
277 3. Implement the function as a stub. Once you add the function to the .spec
278 file, you must add the function to the Wine source before it will link.
279 Add a function called 'PolyBezierTo' somewhere. Good things to put
280 into a stub:
281 o a correct prototype, including the WINAPI
282 o header comments, including full documentation for the function and
283 arguments (see documentation/README.documentation)
284 o A FIXME message and an appropriate return value are good things to
285 put in a stub.
287 /************************************************************
288 * PolyBezierTo (GDI32.269)
289 *
290 * Draw many Bezier curves.
291 *
292 * PARAMS
293 * hdc [I] Device context to draw to
294 * p [I] Array of POINT structs
295 * count [I] Number of points in p
296 *
297 * RETURNS
298 * Success: Non-zero.
299 * Failure: FALSE. Use GetLastError() to find the error cause.
300 *
301 * BUGS
302 * Unimplemented
303 */
304 BOOL WINAPI PolyBezierTo(HDC hdc, LPCVOID p, DWORD count)
305 {
306 /* tell the user they've got a substandard implementation */
307 FIXME(gdi, ":(%x,%p,%d): stub\n", hdc, p, count);
309 /* some programs may be able to compensate,
310 * if they know what happened
311 */
312 SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
313 return FALSE; /* error value */
314 }
316 4. Implement and test the rest of the function.
319 IMPLEMENTING A NEW DLL
320 ======================
322 Generic directions
323 ------------------
325 Apart from writing the set of needed .c files, you also need to do the
326 following:
328 1. Create a directory <MyDll> where to store the implementation of
329 the DLL. This directory has to be put under the dlls/ directory.
330 If the DLL exists under Windows as both 16 and 32 bit DLL, you
331 should have a single directory with both implementations.
333 2. Create the Makefile.in in the ./dlls/<MyDll>/ directory. You can
334 copy an existing Makefile.in from another ./dlls/ subdirectory.
335 You need at least to change the MODULE and C_SRCS macros.
337 3. Add the directory in ./configure.ac (in AC_OUTPUT macro at the end
338 of the file to trigger the Makefile generation)
340 4. Run ./make_dlls in the dlls directory to update Makefile.in in
341 that directory.
343 5. You can now regenerate ./configure file (with 'make configure')
344 and the various Makefiles (with 'configure; make depend') (run
345 from the top of Wine's tree).
346 You should now have a Makefile file in ./dlls/<MyDll>/
348 6. Create the .spec file for the DLL exported functions in your
349 directory. Refer to 'Implementation of new API calls' earlier in
350 this document for more information on this part.
352 7. You can now start adding .c files. For the .h files, if they are
353 standard Windows one, put them in include/. If they are linked to
354 *your* implementation of the dll, put them in your newly created
355 directory.
357 Debug channels
358 --------------
360 If you need to create a new debug channel, just add the
361 WINE_DEFAULT_DEBUG_CHANNEL to your .c file(s), and use them.
362 All the housekeeping will happen automatically.
364 Resources
365 ---------
367 If you also need to add resources to your DLL, then create the .rc
368 file. Add to your ./dlls/<MyDll>/Makefile.in, in the RC_SRCS macro,
369 the list of .rc files to add to the DLL. See dlls/comctl32/ for an
370 example of this.
372 Thunking
373 --------
375 If you're building a 16 & 32 bit DLLs pair, then from the 32 bit code
376 you might need to call 16 bit routine. The way to do it to add in the
377 code, fragments like:
378 /* ### Start build ### */
379 extern WORD CALLBACK <PREFIX>_CallTo16_word_wwlll(FARPROC16,WORD,WORD,LONG,LONG,LONG);
380 /* ### stop build ### */
381 Where <PREFIX>_ is an internal prefix for your module. The first
382 parameter is always of type FARPROC16. Then, you can get the regular
383 list of parameters. The _word_wwlll indicates the type of return (long
384 or word) and the size of the parameters (here l=>long, w=>word; which
385 maps to WORD,WORD,LONG,LONG,LONG.
386 You can put several functions between the Start/Stop build pair.
388 You can also read the winebuild manpage for more details on this.
390 Then, add to ./dlls/<MyDll>/Makefile.in a line like:
392 EXTRA_OBJS = $(MODULE).glue.o
394 See dlls/winmm/ for an example of this.
396 MEMORY AND SEGMENTS
397 ===================
399 NE (Win16) executables consist of multiple segments. The Wine loader
400 loads each segment into a unique location in the Wine processes memory
401 and assigns a selector to that segment. Because of this, it's not
402 possible to exchange addresses freely between 16-bit and 32-bit code.
403 Addresses used by 16-bit code are segmented addresses (16:16), formed
404 by a 16-bit selector and a 16-bit offset. Those used by the Wine code
405 are regular 32-bit linear addresses.
407 There are four ways to obtain a segmented pointer:
408 - Using the MapLS function (recommended).
409 - Allocate a block of memory from the global heap and use
410 WIN16_GlobalLock to get its segmented address.
411 - Declare the argument as 'segptr' instead of 'ptr' in the spec file
412 for a given API function.
414 Once you have a segmented pointer, it must be converted to a linear
415 pointer before you can use it from 32-bit code. This can be done with
416 the MapSL function. The linear pointer can then be used freely with
417 standard Unix functions like memcpy() etc. without worrying about 64k
418 boundaries. Note: there's no easy way to convert back from a linear
419 to a segmented address.
421 In most cases, you don't need to worry about segmented address, as the
422 conversion is made automatically by the callback code and the API
423 functions only see linear addresses. However, in some cases it is
424 necessary to manipulate segmented addresses; the most frequent cases
425 are:
426 - API functions that return a pointer
427 - lParam of Windows messages that point to a structure
428 - Pointers contained inside structures accessed by 16-bit code.
430 It is usually a good practice to used the type 'SEGPTR' for segmented
431 pointers, instead of something like 'LPSTR' or 'char *'. As SEGPTR is
432 defined as a DWORD, you'll get a compilation warning if you mistakenly
433 use it as a regular 32-bit pointer.
436 STRUCTURE PACKING
437 =================
439 Under Windows, data structures are tightly packed, i.e. there is no
440 padding between structure members. On the other hand, by default gcc
441 aligns structure members (e.g. WORDs are on a WORD boundary, etc.).
442 This means that a structure like
444 struct { BYTE x; WORD y; };
446 will take 3 bytes under Windows, but 4 with gcc, because gcc will add a
447 dummy byte between x and y. To have the correct layout for structures
448 used by Windows code, you need to embed the struct within two special
449 #include's which will take care of the packing for you:
451 #include "pshpack1.h"
452 struct { BYTE x; WORD y; };
453 #include "poppack1.h"
455 For alignment on a 2-byte boundary, there is a "pshpack2.h", etc.
458 NAMING CONVENTIONS FOR API FUNCTIONS AND TYPES
459 ==============================================
461 In order to support both Win16 and Win32 APIs within the same source
462 code, the following convention must be used in naming all API
463 functions and types. If the Windows API uses the name 'xxx', the Wine
464 code must use:
466 - 'xxx16' for the Win16 version,
467 - 'xxx' for the Win32 version when no strings are involved,
468 - 'xxxA' for the Win32 version with ASCII strings,
469 - 'xxxW' for the Win32 version with Unicode strings.
471 If the function has both ASCII and Unicode version, you should then
472 use the macros WINELIB_NAME_AW(xxx) or DECL_WINELIB_TYPE_AW(xxx)
473 (defined in include/windef.h) to define the correct 'xxx' function
474 or type for Winelib. When compiling Wine itself, 'xxx' is _not_
475 defined, meaning that code inside of Wine must always specify
476 explicitly the ASCII or Unicode version.
478 If 'xxx' is the same in Win16 and Win32, you can simply use the same
479 name as Windows, i.e. just 'xxx'. If 'xxx' is Win16 only, you could
480 use the name as is, but it's preferable to use 'xxx16' to make it
481 clear it is a Win16 function.
483 Examples:
485 typedef struct { /* Win32 ASCII data structure */ } WNDCLASSA;
486 typedef struct { /* Win32 Unicode data structure */ } WNDCLASSW;
487 typedef struct { /* Win16 data structure */ } WNDCLASS16;
488 DECL_WINELIB_TYPE_AW(WNDCLASS);
490 ATOM RegisterClass16( WNDCLASS16 * );
491 ATOM RegisterClassA( WNDCLASSA * );
492 ATOM RegisterClassW( WNDCLASSW * );
493 #define RegisterClass WINELIB_NAME_AW(RegisterClass)
495 The Winelib user can then say:
497 WNDCLASS wc = { ... };
498 RegisterClass( &wc );
500 and this will use the correct declaration depending on the definition
501 of the UNICODE symbol.
504 DEBUG MESSAGES
505 ==============
507 To display a message only during debugging, you normally write something
508 like this:
510 TRACE("abc..."); or
511 FIXME("abc..."); or
512 WARN("abc..."); or
513 ERR("abc...");
515 depending on the seriousness of the problem. (documentation/debugging.sgml
516 explains when it is appropriate to use each of them). You need to declare
517 the debug channel name at the top of the file (after the includes) using
518 the WINE_DEFAULT_DEBUG_CHANNEL macro, like so:
520 WINE_DEFAULT_DEBUG_CHANNEL(win);
522 If your debugging code is more complex than just printf, you can use
523 the macros:
525 TRACE_ON(xxx), WARN_ON(xxx), ERR_ON(xxx) and FIXME_ON(xxx)
527 to test if the given channel is enabled. Thus, you can write:
529 if (TRACE_ON(win)) DumpSomeStructure(&str);
531 Don't worry about the inefficiency of the test. If it is permanently
532 disabled (that is TRACE_ON(win) is 0 at compile time), the compiler will
533 eliminate the dead code.
535 For more info about debugging messages, read:
537 http://www.winehq.org/site/docs/wine-devel/debugging
540 MORE INFO
541 =========
543 1. There is a FREE online version of the MSDN library (including
544 documentation for the Win32 API) on http://msdn.microsoft.com/
545 or http://www.msdn.com/
547 2. Windows apilist: http://www.mentalis.org/apilist/apilist.php
549 3. http://www.sonic.net/~undoc/bookstore.html
551 4. In 1993 Dr. Dobbs Journal published a column called "Undocumented Corner".
553 5. www.geocities.com/SiliconValley/4942/