README-win32.txt
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- GLUT for Win32 README
- ---------------------
- VERSION/INFO:
- This is GLUT for Win32 version 3.7.6 as of Nov 8th 2001.
- See the COPYRIGHT section for distribution and copyright notices.
- Send all bug reports and questions for this version of GLUT to
- Nate Robins [nate@pobox.com].
- For more information about GLUT for Win32, see the web page:
- www.pobox.com/~nate/glut.html or subscribe to the GLUT for Win32
- mailing list by sending e-mail to majordomo@perp.com with
- "subscribe glut" in the body of the message.
- For general information about GLUT, see the GLUT web page:
- http://reality.sgi.com/opengl/glut3/glut3.html and be sure to
- check the GLUT FAQ first for any questions that you may have:
- http://reality.sgi.com/opengl/glut3/glut-faq.html
- COMPILING/INSTALLATION:
- o Precompiled versions of the DLL and import library can be
- found on the GLUT for Win32 web page mentioned above.
- o Microsoft Developer Studio 6 workspace and project files have
- been included in the source code distribution.
-
- To build the glut dll:
- First, open Microsoft Developer Studio.
- Then, select File -> Open Workspace and find the glut.dsw file
- in the file dialog and double-click on it.
- Finally, select Build -> Build glut32.dll.
- When the build is finished, it will copy:
- glut32.dll to %WinDir%System,
- glut32.lib to $(MSDevDir)....VC98lib, and
- glut.h to $(MSDevDir)....VC98includeGL.
-
- Additional workspace files have been included in the progs, test
- and lib directories to build the progs, tests and libs respectively.
- BORLAND NOTES:
- From what I understand, Borland supplies a utility that
- converts Microsoft Visual C++ .libs into Borland compatible
- files. Therefore, the best method for Borland users is
- probably to get the precompiled versions of the library and
- convert the library. To create an import library for Borland
- from the DLLs, use the following command (from a command prompt):
- IMPLIB glut32.lib glut32.dll
- If IMPLIB crashes when called this way, try
- IMPLIB glut32.lib glut32.def
- using the glut32.def file in this distribution.
- FORTRAN NOTES:
- Bill Mitchell [william.mitchell@nist.gov] has put considerable
- effort into getting GLUT to work with different compilers for
- Fortran 90. He indicates that you should copy the f90glut.h
- file to your $(MSDevDir)....VC98includeGL directory.
- Then, just build GLUT as usual. The Fortran 90 interface, f90gl,
- can be obtained at http://math.nist.gov/f90gl and contains
- installation instructions and usage examples.
- MISC NOTES:
- o Overlay support is not implemented, nor are there any plans to
- implement it in the near future.
- o To customize the windows icon, you can use the resource name
- GLUT_ICON. For example, create an icon named "glut.ico", and
- create a file called glut.rc that contains the following:
- GLUT_ICON ICON glut.ico
- then compile the glut.rc file with the following:
- rc /r glut
- and link the resulting glut.res file into your executable
- (just like you would an object file).
- Alternatively, you can simply add the glut.rc file to your
- project if you are using Microsoft Developer Studio.
- IMPLEMENTATION DEPENDENT DIFFERENCES:
- There are a few differences between the Win32 version of GLUT
- and the X11 version of GLUT. Those are outlined here. Note
- that MOST of these differences are allowed by the GLUT
- specification. Bugs and unsupported features are outlined in
- the UNSUPPORTED/BUGS section.
- o glutInit:
- The following command line options have no meaning (and are
- ignored) in GLUT for Win32:
- -display, -indirect, -direct, -sync.
- o glutInitWindowPosition, glutPositionWindow:
- Win32 has two different coordinate systems for windows.
- One is in terms of client space and the other is the whole
- window space (including the decorations). If you
- glutPositionWindow(0, 0), GLUT for Win32 will place the
- window CLIENT area at 0, 0. This will cause the window
- decorations (title bar and left edge) to be OFF-SCREEN, but
- it gives the user the most flexibility in positioning.
- HOWEVER, if the user specifies glutInitWindowPosition(0, 0),
- the window is placed relative to window space at 0, 0.
- This will cause the window to be opened in the upper left
- corner with all the decorations showing. This behaviour is
- acceptable under the current GLUT specification.
- o glutSetIconTitle, glutSetWindowTitle:
- There is no separation between Icon title and Window title
- in Win32. Therefore, setting an icon title in Win32 has
- no effect.
- o glutSetCursor:
- As indicated in the GLUT specification, cursors may be
- different on different platforms. This is the case in GLUT
- for Win32. For the most part, the cursors will match the
- meaning, but not necessarily the shape. Notable exceptions
- are the GLUT_CURSOR_INFO & GLUT_CURSOR_SPRAY which use the
- crosshair cursor and the GLUT_CURSOR_CYCLE which uses the
- 'no' or 'destroy' cursor in Win32.
- o glutVisibilityFunc:
- Win32 seems to be unable to determine if a window is fully
- obscured. Therefore, the visibility of a GLUT window is
- only reflected by its Iconic, Hidden or Shown state. That
- is, even if a window is fully obscured, in GLUT for Win32,
- it is still "visible".
- o glutEntryFunc:
- Window Focus is handled differently in Win32 and X.
- Specifically, the "window manager" in Win32 uses a "click to
- focus" policy. That is, in order for a window to receive
- focus, a mouse button must be clicked in it. Likewise, in
- order for a window to loose focus, a mouse button must be
- clicked outside the window (or in another window).
- Therefore, the Enter and Leave notification provided by GLUT
- may behave differently in the Win32 and in X11 versions.
- There is a viable workaround for this. A program called
- "Tweak UI" is provided by Microsoft which can be used to
- change the focus policy in Win32 to "focus follows mouse".
- It is available from the Microsoft Web Pages:
- http://www.microsoft.com/windows/software/PowerToy.htm
- o glutCopyColormap:
- GLUT for Win32 always copies the colormap. There is never
- any sharing of colormaps. This is probably okay, since
- Win32 merges the logical palette and the physical palette
- anyway, so even if there are two windows with totally
- different colors in their colormaps, Win32 will find a
- (hopefully) good match between them.
- o glutIdleFunc + menus:
- The glut idle function will NOT be called when a menu is
- active. This causes all animation to stop when a menu is
- active (in general, this is probably okay). Timer
- functions will still fire, however. If the timer callback
- draws into the rendering context, the drawing will not show
- up until after the menu has finished, though.
- UNSUPPORTED/BUGS:
- o glutAttachMenu:
- Win32 only likes to work with left and right mouse buttons.
- Especially so with popup menus. Therefore, when attaching
- the menu to the middle mouse button, the LEFT mouse button
- must be used to select from the menu.
- o glutSpaceball*, glutButtonBox*, glutTablet*, glutDials*:
- None of the special input devices are supported at this
- time.
- o When resizing or moving a GLUT for Win32 window, no updating
- is performed. This causes the window to leave "tracks" on
- the screen when getting bigger or when previously obscured
- parts are being revealed. I put in a bit of a kludgy
- workaround for those that absolutely can't have the weird
- lines. The reshape callback is called multiple times for
- reshapes. Therefore, in the reshape callback, some drawing
- can be done. It should probably be limited to a color buffer
- clear.
- o The video resizing capabilities of GLUT 3.3+ for X11 is
- currently unimplemented (this is probably ok, since it
- really isn't part of the spec until 4.0). I doubt that
- this will ever be part of GLUT for Win32, since there is no
- hardware to support it. A hack could simply change the
- resolution of the desktop.
- CHANGES/FIXES:
- (Nov 8, '01)
- x Released 3.7.6
- (Nov 8, '01)
- x Changed fullscreen mode from TOPMOST back to simply TOP, since
- (it turns out) many people use windows atop a GLUT window.
- (Nov 8, '01)
- x Added code to prevent CPU spiking when no idle function is
- registered. Otherwise, if an idle function is registered, spike
- CPU so that the idle function gets all the attention it needs and
- if this is a problem on the program side, the user can stick a
- sleep() in their idle function. I believe that this strikes the
- best balance betweeen GLUT being fast, and also being "nice" to
- other processes. Thanks to James Wright for reporting this bug.
- (Nov 8, '01)
- x Fixed bug in motion callback handler which wasn't setting the
- current window, so multiple window apps (e.g., any GLUI app)
- wouldn't get the callback correctly.
- (Oct 4, '01)
- x Fixed bug in glutEnterGameMode() that caused new windows to not
- be in "fullscreen" mode, so they got window decorations.
- (Oct 4, '01)
- x Fixed bug in glutEnterGameMode() that caused new windows to not
- be in "fullscreen" mode, so they got window decorations.
- (Oct 3, '01)
- x Fixed bug in getVisualInfoFromString(): visuals not reloaded on
- display mode change. Reload visuals each time they are queried.
- This fixes a problem with Win32 because the list of availabe Visuals
- (Pixelformats) changes after a change in displaymode. The problem
- occurs when switching to gamemode and back. Thanks to Michael
- Wimmer for pointing this out & providing the fix.
- (Oct 3, '01)
- x Fixed bug in XGetVisualInfo(): pixelformats enumerated incorrectly.
- Passing 0 as a pixelformat index to DescribePixelFormat gives
- unpredictible results (e.g., this fails on the Voodoo opengl32.dll
- and always reports 0 as the last available pixelformat index).
- Thanks to Michael Wimmer for pointing this out & providing the fix.
- (Oct 3, '01)
- x Fixed bug in glXGetConfig(): pixelformats enumerated incorrectly. The
- test was OpenGL support OR draw to window, but should be AND. Thanks
- to Michael Wimmer for pointing this out & providing the fix.
- (Sep 28, '01)
- x Fixed glutChangeToSubMenu()/glutChangeToMenuEntry() bug where if you
- went back and forth between a submenu and a plain entry, the submenu
- wouldn't be updated properly.
- (Sep 28, '01)
- x glutSetIconTitle() is now a nop.
- (Sep 28, '01)
- x glutFullScreen() now sets the window as TOPMOST, therefore, the
- window will always be on top (this essentially disables alt-tabbing).
- (Sep 28, '01)
- x The key repeat ignore flag is now honored correctly.
- (Sep 28, '01)
- x Key presses are now reported more accurately and fully, in
- particular, modified up events (i.e., SHIFT-2) are now reported
- correctly.
- (Sep 28, '01)
- x Subwindows nested arbitrarily deep get their keyboard callbacks
- correctly now.
- (Sep 28, '01)
- x Major rewrite of the window procedure code to clean it up and make
- way for other bug fixes.
- (Sep 23, '01)
- x Fixed noof example program to use RAND_MAX instead of assumed
- max of 2147483647.0. (Now it looks _much_ better!)
- (Sep 22, '01)
- x Fixed sunlight example program. globe.raw data file was corrupt,
- added a new one.
- (Sep 22, '01)
- x Fixed zcomposite example program to print message if overlay
- support is not found (instead of crashing).
- (Jan 22, '01)
- x Fixed malloc(0) bug in Win32 version of XGetVisualInfo. Thanks
- to Kekoa Proudfoot for bringing this to my attention.
- (Dec 12, '00)
- x Added data files for the advanced & advanced97 programs.
- (Dec 12, '00)
- x Added Developer Studio 6 project and workspace files for pretty
- much everything (the stuff left out was usually unix specific).
- (Dec 7, '00)
- x Fixed several compilation problems & corrupt files. Thanks to
- Alexander Stohr for bringing these to my attention and providing
- detailed fixes.
- (Dec 6, '00)
- x Fixed compiler support for lcc. Thanks to Gordon for bringing
- this to my attention and debugging fixes.
- (Nov 8, '00)
- x Fixed submenu problem (sometimes the menu callback was not
- called for valid items). Thanks to Michael Keeley.
- (Oct 16, '00)
- x Corrected corrupt duck.iv file. Thanks to Jon Willeke for finding
- this problem.
- (Sept 27, '00)
- x Fixed bug in processWorkList that could cause a hang. Thanks to
- Bill Volz & Daniel Azuma.
- (Sept 26, '00)
- x Added mui DLL project file (thanks to DMWeldy@ugsolutions.com).
- (Sept 9, '00)
- x Fixed Delete key bug (crash when no keyboard callback was
- registered, but a special key callback was). Thanks to
- Kent Bowling (kent_bowling@hotmail.com) for finding this bug.
- (May 18, '00)
- x Fixed subwindow keyboard callbacks.
- (May 22, '97)
- o Menus don't work under Windows 95
- x Fixed! Added a unique identifier to each menu item, and a
- search function to grab a menu item given the unique identifier.
- (May 21, '97)
- o A few minor bug fixes here and there.
- x Thanks to Bruce Silberman and Chris Vale for their help with
- this. We now have a DLL!
- (Apr 25, '97)
- o DLL version of the library is coming (as soon as I figure out
- how to do it -- if you know, let me know).
- x Thanks to Bruce Silberman and Chris Vale for their help with
- this. We now have a DLL!
- (Apr 24, '97)
- x Added returns to KEY_DOWN etc messages so that the F10 key
- doesn't toggle the system menu anymore.
- (Apr 7, '97)
- o Palette is incorrect for modes other than TrueColor.
- x Fixed this by forcing a default palette in modes that aren't
- Truecolor in order to 'simulate' it. The applications
- program shouldn't have to do this IMHO, but I guess we
- can't argue with Microsoft (well, we can, but what good
- will it do?).
- (Apr 2, '97)
- x Added glut.ide file for Borland users.
- (Apr 2, '97)
- x Fixed a bug in the WM_QUERYNEWPALETTE message. Wasn't
- checking for a null colormap, then de-ref'd it. Oops.
- (Mar 13, '97)
- o glutTimerFunc:
- Currently, GLUT for Win32 programs busy waits when there is
- an outstanding timer event (i.e., there is no select()
- call). I haven't found this to be a problem, but I plan to
- fix it just because I can't bear the thought of a busy wait.
- x Added a timer event and a wait in the main loop. This fixes
- the CPU spike.
- (Mar 11, '97)
- x Fixed subwindow visibility. The visibility callback of
- subwindows wasn't being called, now it is.
- (Mar 11, '97)
- o glutGetHDC, glutGetHWND:
- In order to support additional dialog boxes, wgl fonts, and
- a host of other Win32 dependent structures, two functions
- have been added that operate on the current window in GLUT.
- The first (glutGetHDC) returns a handle to the current
- windows device context. The second (glutGetHWND) returns
- handle to the current window.
- x Took these out to preserve GLUT portability.
- (Mar 11, '97)
- x Fixed the glutWarpPointer() coordinates. Were relative to
- the screen, now relative to window (client area) origin
- (which is what they're supposed to be).
- (Mar 11, '97)
- o glutCreateMenu, glutIdleFunc:
- Menu's are modal in Win32. That is, they don't allow any
- messages to be processed while they are up. Therefore, if
- an idle function exists, it will not be called while
- processing a menu.
- x Fixed! I've put in a timer function that fires every
- millisecond while a menu is up. The timer function handles
- idle and timer events only (which should be the only
- functions that are firing when a menu is up anyway).
- (Mar 7 '97)
- x Fixed minor bugs tracked down by the example programs.
- (Mar 6, '97)
- x Merged 3.3 GLUT for X11 into 3.2 GLUT for Win32. New code
- structure allows for EASY merging!
- o In Win32, the parent gets the right to set the cursor of
- any of its children. Therefore, a child windows cursor
- will 'blink' between its cursor and its parent.
- x Fixed this by checking whether the cursor is in a child
- window or not.
- (Feb 28 '97)
- o On initial bringup apps are getting 2 display callbacks.
- x Fixed by the Fev 28 re-write.
- o Some multiple window (not subwindow) functionality is messed up.
- See the sphere.exe program.
- x Fixed by the Feb 28 re-write.
- o GLUT for Win32 supports color index mode ONLY in a paletted
- display mode (i.e., 256 or 16 color mode).
- x Fixed this in the re-write. If you can get a color index
- visual (pixel format) you can use color index mode.
- (Feb 28 '97)
- o Quite a few bugs (and incompatibilities) were being caused
- by the structure that I used in the previous port of GLUT.
- Therefore I decided that it would be best to "get back to
- the roots". I re-implemented most of glut trying to stick
- with the structure layed out by Mark. The result is a much
- more stable version that passes ALL (!) (except overlay)
- the tests provided by Mark. In addition, this new
- structure will allow future enhancements by Mark to be
- integrated much more quickly into the Win32 version. Also,
- I'm now ordering the bugs in reverse, so that the most
- recently fixed appear at the top of the list.
- (9/8/96)
- o Changed the glutGetModifiers code to produce an error if not
- called in the core input callbacks.
- (9/11/96)
- o If the alt key is pressed with more than one other modifier key
- it acts as if it is stuck -- it stays selected until pressed
- and released again.
- x Fixed.
- (9/12/96)
- o When a submenu is attached to a menu, sometimes a GPF occurs.
- Fixed. Needed to set the submenu before referencing it's members.
- o Kenny: Also, one little problem, I attached the menu to the
- right-button, but when the left-button is pressed I detach
- it to give the right-button new meaning; if I pop-up the menu and I
- don't want to select anything, like most users, I click off of the
- menu to make it disappear. When I do this, I get a GLUT error and
- the program terminates because I am altering the menu attachment
- from within the button press while the menu is active.
- x Fixed. Needed to finish the menu when the user presses the button,
- not just when a button is released.
- o GLUT for Win32 emulates a middle mouse button by checking if
- both mouse buttons are down. This causes a lot of problems with
- the menu and other multiple mouse button things.
- x Fixed. No more middle mouse button emulation. Perhaps it would
- be a good idea to emulate the middle mouse button (if not present)
- with a key?
- (9/15/96)
- o Added code to accept a user defined icon. If no icon is provided,
- a default icon is loaded.
- (9/19/96)
- o Shane: Command line options seem to be screwed up. (9/13)
- x Fixed. The geometry command line was broken, and so was the
- gldebug command line.
- o Fixed a bug in the default glut reshape. It was looking for the
- parent of the current window and GPF'ing if there wasn't a parent.
- Put in a check for a parent, and if none is there, use the
- child.
- o Idle function sucks up all processor cycles. (9/8/96)
- x I don't know if this is avoidable. If you have a tight rendering
- loop, it may be that the processor time is going to be sucked up
- no matter what. You can add a sleep() to the end of your render
- loop if you would like to yeild to other processes and you don't
- care too much about the speed of your rendering loop. If you have
- Hardware that supports OpenGL (like a 3Dpro card, or GLint card)
- then this should be less of a problem, since it won't be rendering
- in software. (9/11/96)
- o If a window is fully obscured by another window, the visibility
- callback is NOT called. As far as I can tell, this is a limitation
- of the Win32 api, but a workaround is being searched for. (9/8/96)
- x Limitation of the Win32 API
- o Fixed the entry functions. They only work if the keyboard focus
- changes. Therefore, in most Win32 systems, the mouse must be
- pressed outside of the window to get a GLUT_LEFT message and
- then pressed inside the window for a GLUT_ENTERED message.
- o Alt modifier key doesn't work with keyboard callback. (9/8/96)
- x Probably okay, because the glut spec says that these keys can
- be intercepted by the system (which the alt key is...) (9/11/96)
- (11/17/96)
- o glutRemoveMenuItem() not working properly.
- x Thanks to Gary (grc@maple.civeng.rutgers.edu) for the fix to
- this one.
- o Timer functions are messed up.
- x Thanks to Joseph Galbraith for the fix to this one.
- (12/9/96)
- o One (minor) difference came up between the X version of glut
- and the nt one which you should know about. It is not a new
- problem, and it concerns co-ords returned to the pointer
- callbacks. (glutMotionFunc, glutMouseFunc)
- Under X, you get co-ords in the range 0 +/- 2^15, under NT
- you get 0..2^16. This is only really a problem when moving
- above or to the left of the window.
- eg dragging one pixel ABOVE the window will give :-
- under x11 : y = -1
- under nt : y = 2^16 -1
- x Put in fix provided by Shane Clauson.
- (12/17/96)
- o Idle functions not working properly for multiple windows.
- x Fixed this by posting an idle message to every window in the
- window list when idle.
- (12/18/96)
- o glutSetCursor() was misbehaving (lthomas@cco.caltech.edu).
- x Win32 requires that the hCursor member of the window class
- be set to NULL when the class is registered or whenever the
- mouse is moved, the original cursor is replaced (go
- figure!). Now sets the cursor whenever a WM_MOUSEMOVE message
- is received, because the WM_SETCURSOR event resets the cursor
- even when in the decoration area.
- o Geometry is not being handled quite right. The numbers don't
- take into account the window decorations. That is, if I say
- make a window 100x100, then the WHOLE window (not just the
- client area) is 100x100. Therefore, the client (opengl) area
- is smaller than 100x100. (9/8/96)
- x Fixed. Added code to subtract the decoration size on glutGet()
- and add the decoration size on glutReshapeWindow().
- o Multiple glutPostRedisplay() calls are NOT being combined.
- To get round the "coalesce" problem on glutPostRedisplay,
- the easiest solution is to roll-your-own coalesce by
- keeping a global "dirty" flag in the app (eg replace all
- calls to glutPostRedisplay with image_dirty=TRUE;), and to
- handle image_dirty with a single glutPostRedisplay in the
- idle callback when required. (erk - but increases
- performance for my particular app (a rendering engine on
- the end of a pipleine with a stream of graphics updates) by
- a couple of orders of magnitude ! ) (9/8/96)
- x Added code to coalesce redisplays. Every idle cycle, a
- check is made to see which windows need redisplay, if they
- need it, a redisplay is posted. The glutPostRedisplay()
- call is just a stub that sets a flag.
- THANKS:
- Special thanks to the following people for extensive testing,
- suggestions, fixes and help:
- Alexander Stohr
- Shane Clauson
- Kenny Hoff
- Richard Readings
- Paul McQuesten
- Philip Winston
- JaeWoo Ahn
- Joseph Galbraith
- Paula Higgins
- Sam Fortin
- Chris Vale
- Bill Mitchell
- and of course, the original author of GLUT:
- Mark Kilgard.
- and many others...
- COPYRIGHT:
- The OpenGL Utility Toolkit distribution for Win32 (Windows NT &
- Windows 95) contains source code modified from the original source
- code for GLUT version 3.3 which was developed by Mark J. Kilgard. The
- original source code for GLUT is Copyright 1997 by Mark J. Kilgard.
- GLUT for Win32 is Copyright 1997 by Nate Robins and is not in the
- public domain, but it is freely distributable without licensing fees.
- It is provided without guarantee or warrantee expressed or implied.
- It was ported with the permission of Mark J. Kilgard by Nate Robins.
- THIS SOURCE CODE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER
- EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- OR MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
- OpenGL (R) is a registered trademark of Silicon Graphics, Inc.