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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 activeds/ - Active Directory Service Interface
18 advapi32/ - Crypto, systeminfo, security, eventlogging
19 advpack/ - Reads and verifies .INF files
20 amstream/ - MultiMedia Streams
21 atl/ - Active Template Library
22 avicap32/ - AVI capture window class
23 avifil32/ - COM object to play AVI files
24 cabinet/ - Cabinet file interface
25 capi2032/ - Wrapper library for CAPI4Linux access
26 cards/ - Card graphics
27 cfgmgr32/ - Config manager
28 comcat/ - Component category manager
29 comctl32/ - Common controls
30 comdlg32/ - Common dialog boxes (both 16 & 32 bit)
31 compstui/ - Common Property Sheet User Interface
32 crtdll/ - Old C runtime library
33 crypt32/ - Cryptography
34 cryptdll/ - Cryptography Manager
35 ctl3d32/ - 3D Effects for Common GUI Components
36 d3d8/ - Direct3D (3D graphics)
37 d3d9/ - Direct3D (3D graphics)
38 d3dim/ - Direct3D Immediate Mode
39 d3drm/ - Direct3D Retained Mode
40 d3dx8/ - Direct3D (3D graphics)
41 d3dxof/ - DirectX Files Functions
42 dbghelp/ - Engine for symbol and module enumeration
43 dciman32/ - DCI Manager (graphics)
44 ddraw/ - DirectDraw (graphics)
45 devenum/ - Device enumeration (part of DirectShow)
46 dinput/ - DirectInput (device input)
47 dinput8/ - DirectInput (device input)
48 dmband/ - DirectMusic Band
49 dmcompos/ - DirectMusic Composer
50 dmime/ - DirectMusic Interactive Engine
51 dmloader/ - DirectMusic Loader
52 dmscript/ - DirectMusic Scripting
53 dmstyle/ - DirectMusic Style Engine
54 dmsynth/ - DirectMusic Software Synthesizer
55 dmusic/ - DirectMusic Core Services
56 dmusic32/ - DirectMusic Legacy Port
57 dnsapi/ - DNS support
58 dplay/ - DirectPlay (networking)
59 dplayx/ - DirectPlay (networking)
60 dpnet/ - DirectPlay (networking)
61 dpnhpast/ - DirectPlay NAT Helper PAST
62 dsound/ - DirectSound (audio)
63 dswave/ - DirectMusic Wave
64 dxdiagn/ - DirectX Diagnostic Tool
65 gdi/ - GDI (graphics)
66 glu32/ - OpenGL Utility library (graphics)
67 glut32/ - OpenGL Utility Toolkit
68 gphoto2.ds/ - Contains libgphoto2 based TWAIN datasource driver
69 hhctrl.ocx/ - HHCTRL OCX implementation
70 hlink/ - Microsoft Hyperlink Library
71 iccvid/ - Radius Cinepak Video Decoder
72 icmp/ - ICMP protocol (networking)
73 ifsmgr.vxd/ - IFSMGR VxD implementation
74 imaadp32.acm/ - IMA ADPCM Audio Codec
75 imagehlp/ - PE (Portable Executable) Image Helper lib
76 imm32/ - Input Method Manager
77 inseng/ - Install engine
78 iphlpapi/ - IP Helper API
79 itss/ - Infotech Structured Storage (HTML Help)
80 kernel/ - The Windows kernel
81 lz32/ - Lempel-Ziv compression/decompression
82 mapi32/ - Mail interface
83 mciavi32/ - MCI video driver
84 mcicda/ - MCI audio CD driver
85 mciseq/ - MCI MIDI driver
86 mciwave/ - MCI wave driver
87 midimap/ - MIDI mapper
88 mlang/ - Multi Language Support
89 mmdevldr.vxd/ - MMDEVLDR VxD implementation
90 monodebg.vxd/ - MONODEBG VxD implementation
91 mpr/ - Multi-Protocol Router (networking)
92 mprapi/ - Multi-Protocol Router Administration
93 msacm32/ - Audio Compression Manager (multimedia)
94 msacm32.drv/ - Audio mapper
95 msadp32.acm/ - MS ADPCM Audio Codec
96 mscms/ - Color Management System
97 msdmo/ - DirectX Media Objects
98 msftedit/ - Rich text editing control (Version 4.1)
99 msg711.acm/ - MS G711 Audio Codec (includes A-Law & MU-Law)
100 mshtml/ - MS HTML component
101 msi/ - Microsoft Installer
102 msimg32/ - Gradient and transparency (graphics)
103 msisys.ocx/ - System information
104 msnet32/ - Network interface
105 msrle32/ - Video codecs
106 msvcrt/ - C runtime library
107 msvcrt20/ - C runtime library version 2.0
108 msvcrt40/ - C runtime library version 4.0
109 msvcrtd/ - C runtime library debugging
110 msvfw32/ - 16 bit video manager
111 msvidc32/ - Microsoft Video-1 Decoder
112 mswsock/ - Misc networking
113 msxml3/ - MSXML Class Factory
114 netapi32/ - Network interface
115 newdev/ - New Hardware Device Library
116 ntdll/ - NT implementation of kernel calls
117 ntdsapi/ - NT Directory Service Provider
118 objsel/ - Object Picker Dialog
119 odbc32/ - Open DataBase Connectivity driver manager
120 odbccp32/ - Open DataBase Connectivity driver installer
121 ole32/ - 32 bit OLE 2.0 libraries
122 oleacc/ - OLE accessibility support
123 oleaut32/ - 32 bit OLE 2.0 automation
124 olecli32/ - 16 bit OLE client
125 oledlg/ - OLE 2.0 user interface support
126 olepro32/ - 32 bit OLE 2.0 automation
127 olesvr32/ - 16 bit OLE server
128 opengl32/ - OpenGL implementation (graphics)
129 powrprof/ - Power Management and Profiling
130 psapi/ - Process Status interface
131 qcap/ - DirectShow runtime
132 quartz/ - DirectShow runtime
133 rasapi32/ - Remote Access Server interface
134 riched20/ - Rich text editing control (Version 2.0 and 3.0)
135 riched32/ - Rich text editing control
136 rpcrt4/ - Remote Procedure Call runtime
137 rsabase/ - RSA encryption
138 rsaenh/ - Crypto API (DES, 3DES, RSA, etc.)
139 sane.ds/ - Contains sane based TWAIN datasource driver
140 secur32/ - Contains Windows Security functions
141 security/ - Security Support Provider Interface
142 sensapi/ - System Event Notification Service
143 serialui/ - Serial port property pages
144 setupapi/ - Setup interface
145 sfc/ - System File Checker (Windows File Protection)
146 shdocvw/ - Shell document object and control
147 shell32/ - COM object implementing shell views
148 shfolder/ - Shell folder service
149 shlwapi/ - Shell Light-Weight interface
150 snmpapi/ - SNMP protocol interface (networking)
151 spoolss/ - Spooler Subsystem Library ("spooler" - Service)
152 stdole2.tlb/ - OLE Automation typelib
153 stdole32.tlb/ - Standard OLE typelib
154 sti/ - Still Image service
155 tapi32/ - Telephone interface
156 twain_32/ - TWAIN Imaging device communications
157 unicows/ - Unicows replacement (Unicode layer for Win9x)
158 url/ - Internet shortcut shell extension
159 urlmon/ - URL Moniker allows binding to a URL
160 user/ - Window management, standard controls, etc.
161 userenv/ - User - Environment and Policy Management
162 usp10/ - Uniscribe Script Processor
163 uxtheme/ - Theme library
164 vdhcp.vxd/ - VDHCP VxD implementation
165 vdmdbg/ - Virtual DOS machine debug library
166 version/ - File installation library
167 vmm.vxd/ - VMM VxD implementation
168 vnbt.vxd/ - VNBT VxD implementation
169 vnetbios.vxd/ - VNETBIOS VxD implementation
170 vtdapi.vxd/ - VTDAPI VxD implementation
171 vwin32.vxd/ - VWIN32 VxD implementation
172 win32skrnl/ - 32-bit function access for 16-bit systems
173 wined3d/ - Wine internal Direct3D helper
174 winedos/ - DOS features and BIOS calls (Wine specific)
175 winemp3.acm/ - Mpeg Layer 3 Audio Codec
176 wineps.drv/ - Postscript driver (Wine specific)
177 winex11.drv/ - X11 display driver (Wine specific)
178 wininet/ - Internet extensions
179 winmm/ - Multimedia (16 & 32 bit)
180 winmm/joystick/ - Joystick driver
181 winmm/winealsa/ - ALSA audio driver
182 winmm/winearts/ - aRts audio driver
183 winmm/wineaudioio/ - audioio audio driver
184 winmm/winecoreaudio/ - CoreAudio audio driver (MacOS)
185 winmm/winejack/ - JACK audio server driver
186 winmm/winenas/ - NAS audio driver
187 winmm/wineoss/ - OSS audio driver
188 winnls32/ - National Language Support
189 winspool.drv/ - Printing & Print Spooler
190 wintab32/ - Tablet device interface
191 wintrust/ - Trust verification interface
192 wldap32/ - LDAP support
193 wnaspi32/ - 16 bit Advanced SCSI Peripheral Interface
194 wow32/ - WOW subsystem
195 ws2_32/ - Sockets 2.0 (networking)
196 wsock32/ - Sockets 1.1 (networking)
197 wtsapi32/ - Terminal Services
199 Winelib programs (under programs/):
200 -----------------------------------
202 clock/ - Graphical clock
203 cmdlgtst/ - Common dialog tests
204 control/ - Control panel
205 eject/ - Unmount and eject removable Media
206 expand/ - Decompress Lempel-Ziv compressed archive
207 explorer/ - Desktop/Systray/HAL-Manager, Winefile-wrapper
208 hh/ - HTML Help viewer
209 icinfo/ - List/Configure installed Video Compressors
210 iexplore/ - Internet Explorer replacement
211 msiexec/ - Microsoft Installer frontend
212 notepad/ - Notepad replacement
213 oleview/ - OLE/COM Object Viewer
214 progman/ - Program manager
215 regedit/ - Registry editor
216 regsvr32/ - Register COM server
217 rpcss/ - RPC services
218 rundll32/ - Execute DLL functions directly
219 start/ - Replacement for start.exe
220 taskmgr/ - Manage running Windows/Winelib applications
221 uninstaller/ - Remove installed programs
222 view/ - Metafile viewer
223 wcmd/ - Command line interface
224 wineboot/ - Wine bootstrap process
225 winebrowser/ - Frontend for Webbrowsers on the Host
226 winecfg/ - Wine configuration utility
227 wineconsole/ - Console
228 winedbg/ - Debugger
229 winefile/ - File manager
230 winemenubuilder/ - Helper program for building Unix menu entries
231 winemine/ - Mine game
232 winepath/ - Translate between Wine and Unix paths
233 winetest/ - Wine testing shell
234 winevdm/ - Wine virtual DOS machine
235 winhelp/ - Help viewer
236 winver/ - Windows Version Program
237 wordpad/ - Wordpad replacement skeleton
240 Support programs, libraries, etc:
241 ---------------------------------
243 dlls/dxerr8/ - DirectX 8 error import lib
244 dlls/dxerr9/ - DirectX 9 error import lib
245 dlls/dxguid/ - DirectX UUID import lib
246 dlls/strmiids/ - Exports class CLSIDs and interface IIDs
247 dlls/uuid/ - Windows-compatible UUID import lib
248 documentation/ - some documentation
249 include/ - Windows standard includes
250 include/ddk/ - Windows DDK compatible headers
251 include/msvcrt/ - MSVC compatible libc headers
252 include/wine/ - Wine specific headers
253 libs/ - the Wine libraries
254 libs/port/ - portability library
255 libs/unicode/ - Unicode support shared
256 libs/wine/ - Wine bootstrap library
257 libs/wpp/ - C preprocessor
258 loader/ - the main Wine loader
259 server/ - the Wine server
260 tools/ - various tools used to build/check Wine
261 tools/widl/ - the IDL compiler
262 tools/winapi/ - A Win32 API checker
263 tools/winebuild/ - Wine build tool
264 tools/winedump/ - a .DLL dump utility
265 tools/winegcc/ - a MinGW command line compatible gcc wrapper
266 tools/wmc/ - the message compiler
267 tools/wrc/ - the resource compiler
271 IMPLEMENTING NEW API CALLS
272 ==========================
274 This is the simple version, and covers only Win32. Win16 is slightly
275 uglier, because of the Pascal heritage and the segmented memory model.
277 All of the Win32 APIs known to Wine are listed in the .spec file of
278 their corresponding dll. An unimplemented call will look like (from
279 gdi32.spec)
280 @ stub PolyPatBlt
281 To implement this call, you need to do the following four things.
283 1. Find the appropriate parameters for the call, and add a prototype to
284 the correct header file. In this case, that means [include/wingdi.h],
285 and it might look like
286 BOOL WINAPI PolyPatBlt(HDC, LPCVOID, DWORD);
287 If the function has both an ASCII and a Unicode version, you need to
288 define both and add a #define WINELIB_NAME_AW declaration. See below
289 for discussion of function naming conventions.
291 2. Modify the .spec file to tell Wine that the function has an
292 implementation, what the parameters look like and what Wine function
293 to use for the implementation. In Win32, things are simple--everything
294 is 32-bits. However, the relay code handles pointers and pointers to
295 strings slightly differently, so you should use 'str' and 'wstr' for
296 strings, 'ptr' for other pointer types, and 'long' for everything else.
297 @ stdcall PolyPatBlt(long ptr long) PolyPatBlt
298 The 'PolyPatBlt' at the end of the line is which Wine function to use
299 for the implementation.
301 3. Implement the function as a stub. Once you add the function to the .spec
302 file, you must add the function to the Wine source before it will link.
303 Add a function called 'PolyPatBlt' somewhere. Good things to put
304 into a stub:
305 o a correct prototype, including the WINAPI
306 o header comments, including full documentation for the function and
307 arguments (see documentation/README.documentation)
308 o A FIXME message and an appropriate return value are good things to
309 put in a stub.
311 /************************************************************
312 * PolyPatBlt (GDI32.@)
313 *
314 * Draw many Bezier curves.
315 *
316 * PARAMS
317 * hdc [I] Device context to draw to
318 * p [I] Array of POINT structs
319 * count [I] Number of points in p
320 *
321 * RETURNS
322 * Success: Non-zero.
323 * Failure: FALSE. Use GetLastError() to find the error cause.
324 *
325 * BUGS
326 * Unimplemented
327 */
328 BOOL WINAPI PolyPatBlt(HDC hdc, LPCVOID p, DWORD count)
329 {
330 /* tell the user they've got a substandard implementation */
331 FIXME("(%x,%p,%d): stub\n", hdc, p, count);
333 /* some programs may be able to compensate,
334 * if they know what happened
335 */
336 SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
337 return FALSE; /* error value */
338 }
340 4. Implement and test the rest of the function.
343 IMPLEMENTING A NEW DLL
344 ======================
346 Generic directions
347 ------------------
349 Apart from writing the set of needed .c files, you also need to do the
350 following:
352 1. Create a directory <MyDll> where to store the implementation of
353 the DLL. This directory has to be put under the dlls/ directory.
354 If the DLL exists under Windows as both 16 and 32 bit DLL, you
355 should have a single directory with both implementations.
357 2. Create the Makefile.in in the ./dlls/<MyDll>/ directory. You can
358 copy an existing Makefile.in from another ./dlls/ subdirectory.
359 You need at least to change the MODULE and C_SRCS macros.
361 3. Add the directory in ./configure.ac (in AC_OUTPUT macro at the end
362 of the file to trigger the Makefile generation)
364 4. Run ./make_dlls in the dlls directory to update Makefile.in in
365 that directory.
367 5. You can now regenerate ./configure file (with 'autoconf')
368 and the various Makefiles (with 'configure; make depend') (run
369 from the top of Wine's tree).
370 You should now have a Makefile file in ./dlls/<MyDll>/
372 6. Create the .spec file for the DLL exported functions in your
373 directory. Refer to 'Implementation of new API calls' earlier in
374 this document for more information on this part.
376 7. You can now start adding .c files. For the .h files, if they are
377 standard Windows one, put them in include/. If they are linked to
378 *your* implementation of the dll, put them in your newly created
379 directory.
381 Debug channels
382 --------------
384 If you need to create a new debug channel, just add the
385 WINE_DEFAULT_DEBUG_CHANNEL to your .c file(s), and use them.
386 All the housekeeping will happen automatically.
388 Resources
389 ---------
391 If you also need to add resources to your DLL, then create the .rc
392 file. Add to your ./dlls/<MyDll>/Makefile.in, in the RC_SRCS macro,
393 the list of .rc files to add to the DLL. See dlls/comctl32/ for an
394 example of this.
396 Thunking
397 --------
399 If you're building a 16 & 32 bit DLLs pair, then from the 32 bit code
400 you might need to call 16 bit routine. The way to do it to add in the
401 code, fragments like:
402 /* ### Start build ### */
403 extern WORD CALLBACK <PREFIX>_CallTo16_word_wwlll(FARPROC16,WORD,WORD,LONG,LONG,LONG);
404 /* ### stop build ### */
405 Where <PREFIX>_ is an internal prefix for your module. The first
406 parameter is always of type FARPROC16. Then, you can get the regular
407 list of parameters. The _word_wwlll indicates the type of return (long
408 or word) and the size of the parameters (here l=>long, w=>word; which
409 maps to WORD,WORD,LONG,LONG,LONG.
410 You can put several functions between the Start/Stop build pair.
412 You can also read the winebuild manpage for more details on this.
414 Then, add to ./dlls/<MyDll>/Makefile.in a line like:
416 EXTRA_OBJS = $(MODULE).glue.o
418 See dlls/winmm/ for an example of this.
420 MEMORY AND SEGMENTS
421 ===================
423 NE (Win16) executables consist of multiple segments. The Wine loader
424 loads each segment into a unique location in the Wine processes memory
425 and assigns a selector to that segment. Because of this, it's not
426 possible to exchange addresses freely between 16-bit and 32-bit code.
427 Addresses used by 16-bit code are segmented addresses (16:16), formed
428 by a 16-bit selector and a 16-bit offset. Those used by the Wine code
429 are regular 32-bit linear addresses.
431 There are four ways to obtain a segmented pointer:
432 - Using the MapLS function (recommended).
433 - Allocate a block of memory from the global heap and use
434 WIN16_GlobalLock to get its segmented address.
435 - Declare the argument as 'segptr' instead of 'ptr' in the spec file
436 for a given API function.
438 Once you have a segmented pointer, it must be converted to a linear
439 pointer before you can use it from 32-bit code. This can be done with
440 the MapSL function. The linear pointer can then be used freely with
441 standard Unix functions like memcpy() etc. without worrying about 64k
442 boundaries. Note: there's no easy way to convert back from a linear
443 to a segmented address.
445 In most cases, you don't need to worry about segmented address, as the
446 conversion is made automatically by the callback code and the API
447 functions only see linear addresses. However, in some cases it is
448 necessary to manipulate segmented addresses; the most frequent cases
449 are:
450 - API functions that return a pointer
451 - lParam of Windows messages that point to a structure
452 - Pointers contained inside structures accessed by 16-bit code.
454 It is usually a good practice to used the type 'SEGPTR' for segmented
455 pointers, instead of something like 'LPSTR' or 'char *'. As SEGPTR is
456 defined as a DWORD, you'll get a compilation warning if you mistakenly
457 use it as a regular 32-bit pointer.
460 STRUCTURE PACKING
461 =================
463 Under Windows, data structures are tightly packed, i.e. there is no
464 padding between structure members. On the other hand, by default gcc
465 aligns structure members (e.g. WORDs are on a WORD boundary, etc.).
466 This means that a structure like
468 struct { BYTE x; WORD y; };
470 will take 3 bytes under Windows, but 4 with gcc, because gcc will add a
471 dummy byte between x and y. To have the correct layout for structures
472 used by Windows code, you need to embed the struct within two special
473 #include's which will take care of the packing for you:
475 #include "pshpack1.h"
476 struct { BYTE x; WORD y; };
477 #include "poppack1.h"
479 For alignment on a 2-byte boundary, there is a "pshpack2.h", etc.
482 NAMING CONVENTIONS FOR API FUNCTIONS AND TYPES
483 ==============================================
485 In order to support both Win16 and Win32 APIs within the same source
486 code, the following convention must be used in naming all API
487 functions and types. If the Windows API uses the name 'xxx', the Wine
488 code must use:
490 - 'xxx16' for the Win16 version,
491 - 'xxx' for the Win32 version when no strings are involved,
492 - 'xxxA' for the Win32 version with ASCII strings,
493 - 'xxxW' for the Win32 version with Unicode strings.
495 If the function has both ASCII and Unicode version, you should then
496 use the macros WINELIB_NAME_AW(xxx) or DECL_WINELIB_TYPE_AW(xxx)
497 (defined in include/windef.h) to define the correct 'xxx' function
498 or type for Winelib. When compiling Wine itself, 'xxx' is _not_
499 defined, meaning that code inside of Wine must always specify
500 explicitly the ASCII or Unicode version.
502 If 'xxx' is the same in Win16 and Win32, you can simply use the same
503 name as Windows, i.e. just 'xxx'. If 'xxx' is Win16 only, you could
504 use the name as is, but it's preferable to use 'xxx16' to make it
505 clear it is a Win16 function.
507 Examples:
509 typedef struct { /* Win32 ASCII data structure */ } WNDCLASSA;
510 typedef struct { /* Win32 Unicode data structure */ } WNDCLASSW;
511 typedef struct { /* Win16 data structure */ } WNDCLASS16;
512 DECL_WINELIB_TYPE_AW(WNDCLASS);
514 ATOM RegisterClass16( WNDCLASS16 * );
515 ATOM RegisterClassA( WNDCLASSA * );
516 ATOM RegisterClassW( WNDCLASSW * );
517 #define RegisterClass WINELIB_NAME_AW(RegisterClass)
519 The Winelib user can then say:
521 WNDCLASS wc = { ... };
522 RegisterClass( &wc );
524 and this will use the correct declaration depending on the definition
525 of the UNICODE symbol.
528 DEBUG MESSAGES
529 ==============
531 To display a message only during debugging, you normally write something
532 like this:
534 TRACE("abc..."); or
535 FIXME("abc..."); or
536 WARN("abc..."); or
537 ERR("abc...");
539 depending on the seriousness of the problem. (documentation/debugging.sgml
540 explains when it is appropriate to use each of them). You need to declare
541 the debug channel name at the top of the file (after the includes) using
542 the WINE_DEFAULT_DEBUG_CHANNEL macro, like so:
544 WINE_DEFAULT_DEBUG_CHANNEL(win);
546 If your debugging code is more complex than just printf, you can use
547 the macros:
549 TRACE_ON(xxx), WARN_ON(xxx), ERR_ON(xxx) and FIXME_ON(xxx)
551 to test if the given channel is enabled. Thus, you can write:
553 if (TRACE_ON(win)) DumpSomeStructure(&str);
555 Don't worry about the inefficiency of the test. If it is permanently
556 disabled (that is TRACE_ON(win) is 0 at compile time), the compiler will
557 eliminate the dead code.
559 For more info about debugging messages, read:
561 http://www.winehq.org/site/docs/wine-devel/debugging
564 MORE INFO
565 =========
567 1. There is a FREE online version of the MSDN library (including
568 documentation for the Win32 API) on http://msdn.microsoft.com/
569 or http://www.msdn.com/
571 2. Windows apilist: http://www.mentalis.org/apilist/apilist.php
573 3. http://www.sonic.net/~undoc/bookstore.html
575 4. In 1993 Dr. Dobbs Journal published a column called "Undocumented Corner".
577 5. www.geocities.com/SiliconValley/4942/