platform specific window handle?
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platform specific window handle?
by Chris Marshall-2
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I've been looking into the possibility
of embedding freeglut opengl windows into other applications or GUI libraries. Typically, one needs a platform specific handle to the window in order to manage handling events and passing events down to the embedded window. Is the a way to request a native window handle from FreeGLUT (e.g. X11 window or a win32 handle)? I'm not sure on what the specific details would be but I would prefer to avoid breaking the FreeGLUT abstraction layer to solve the problem. For example, I could modify and build my own copy of FreeGLUT with the needed hooks. Cheers, Chris Marshall ------------------------------------------------------------------------------ Come build with us! The BlackBerry(R) Developer Conference in SF, CA is the only developer event you need to attend this year. Jumpstart your developing skills, take BlackBerry mobile applications to market and stay ahead of the curve. Join us from November 9 - 12, 2009. Register now! http://p.sf.net/sfu/devconference _______________________________________________ Freeglut-developer mailing list Freeglut-developer@... https://lists.sourceforge.net/lists/listinfo/freeglut-developer |
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Re: platform specific window handle?
by John Tsiombikas-2
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On Sat, Oct 24, 2009 at 02:51:26PM -0400, Chris Marshall wrote:
> I've been looking into the possibility > of embedding freeglut opengl windows > into other applications or GUI libraries. > > Typically, one needs a platform specific > handle to the window in order to manage > handling events and passing events down > to the embedded window. > > Is the a way to request a native window > handle from FreeGLUT (e.g. X11 window > or a win32 handle)? I'm not sure on what > the specific details would be but I would > prefer to avoid breaking the FreeGLUT > abstraction layer to solve the problem. > > For example, I could modify and build my > own copy of FreeGLUT with the needed hooks. The SFG_Context struct in freeglut_internal.h contains an SFG_WindowHandleType variable which is a Window on X11 and a HWND on windows. That is in turn included in the SFG_Window struct. A list of windows is kept in the SFG_Structure (see fgStructure in freeglut_structure.c). So, there it is, you can easily modify your own copy to do that. As far as adding that facility to freeglut, I already mentioned in this list some time ago that I think it would be very useful to include a function in the freeglut API to retreive window-system specific variables. However most people here seemed to dissagree, because it might encourage people to write platform-specific code. -- John Tsiombikas http://nuclear.sdf-eu.org/ ------------------------------------------------------------------------------ Come build with us! The BlackBerry(R) Developer Conference in SF, CA is the only developer event you need to attend this year. Jumpstart your developing skills, take BlackBerry mobile applications to market and stay ahead of the curve. Join us from November 9 - 12, 2009. Register now! http://p.sf.net/sfu/devconference _______________________________________________ Freeglut-developer mailing list Freeglut-developer@... https://lists.sourceforge.net/lists/listinfo/freeglut-developer |
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Re: platform specific window handle?
by John F. Fay
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Chris,
Since the purpose of "freeglut" is exactly to shield the application from getting a "platform-specific" anything, I'm not sure how we could have it return a native window handle while remaining true to its purpose. - John At 01:51 PM 10/24/2009, you wrote: >I've been looking into the possibility >of embedding freeglut opengl windows >into other applications or GUI libraries. > >Typically, one needs a platform specific >handle to the window in order to manage >handling events and passing events down >to the embedded window. > >Is the a way to request a native window >handle from FreeGLUT (e.g. X11 window >or a win32 handle)? I'm not sure on what >the specific details would be but I would >prefer to avoid breaking the FreeGLUT >abstraction layer to solve the problem. > >For example, I could modify and build my >own copy of FreeGLUT with the needed hooks. > >Cheers, >Chris Marshall > >------------------------------------------------------------------------------ >Come build with us! The BlackBerry(R) Developer Conference in SF, CA >is the only developer event you need to attend this year. Jumpstart your >developing skills, take BlackBerry mobile applications to market and stay >ahead of the curve. Join us from November 9 - 12, 2009. Register now! >http://p.sf.net/sfu/devconference >_______________________________________________ >Freeglut-developer mailing list >Freeglut-developer@... >https://lists.sourceforge.net/lists/listinfo/freeglut-developer ------------------------------------------------------------------------------ Come build with us! The BlackBerry(R) Developer Conference in SF, CA is the only developer event you need to attend this year. Jumpstart your developing skills, take BlackBerry mobile applications to market and stay ahead of the curve. Join us from November 9 - 12, 2009. Register now! http://p.sf.net/sfu/devconference _______________________________________________ Freeglut-developer mailing list Freeglut-developer@... https://lists.sourceforge.net/lists/listinfo/freeglut-developer |
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Re: platform specific window handle?
by Chris Marshall-2
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John F. Fay wrote:
> > Since the purpose of "freeglut" is exactly to shield the > application from getting a "platform-specific" anything, I'm not sure > how we could have it return a native window handle while remaining > true to its purpose. Well, given that FreeGLUT is a GLUT replacement and from the GLUT description at http://www.opengl.org/resources/libraries/glut/ GLUT (pronounced like the glut in gluttony) is the OpenGL Utility Toolkit, a window system independent toolkit for writing OpenGL programs... with the key phrase being "window system independent", my thought was there are two ways to achieve that: (1) have absolutely no access to window system dependent anything from the GLUT level, or (2) have *exactly* the same interface across all window systems (such as a pointer to a native object). At any rate, the problem seems to boil down to making a GLUT window with a non-GLUT parent window. Maybe this is not a good idea, but I guess I'm trying to address interoperability where GLUT or FreeGLUT can only *ever* be a top level application window and extending that to embedding the window within another application. --Chris > > > At 01:51 PM 10/24/2009, you wrote: > >> I've been looking into the possibility >> of embedding freeglut opengl windows >> into other applications or GUI libraries. >> >> Typically, one needs a platform specific >> handle to the window in order to manage >> handling events and passing events down >> to the embedded window. >> >> Is the a way to request a native window >> handle from FreeGLUT (e.g. X11 window >> or a win32 handle)? I'm not sure on what >> the specific details would be but I would >> prefer to avoid breaking the FreeGLUT >> abstraction layer to solve the problem. >> >> For example, I could modify and build my >> own copy of FreeGLUT with the needed hooks. >> >> Cheers, >> Chris Marshall ------------------------------------------------------------------------------ Come build with us! The BlackBerry(R) Developer Conference in SF, CA is the only developer event you need to attend this year. Jumpstart your developing skills, take BlackBerry mobile applications to market and stay ahead of the curve. Join us from November 9 - 12, 2009. Register now! http://p.sf.net/sfu/devconference _______________________________________________ Freeglut-developer mailing list Freeglut-developer@... https://lists.sourceforge.net/lists/listinfo/freeglut-developer |
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Re: platform specific window handle?
by John Tsiombikas-2
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On Sat, Oct 24, 2009 at 10:26:56PM -0400, Chris Marshall wrote:
> > Well, given that FreeGLUT is a GLUT replacement > and from the GLUT description at > http://www.opengl.org/resources/libraries/glut/ > > GLUT (pronounced like the glut in gluttony) > is the OpenGL Utility Toolkit, a window > system independent toolkit for writing > OpenGL programs... > > with the key phrase being "window system > independent", my thought was there are two > ways to achieve that: > > (1) have absolutely no access to window > system dependent anything from the > GLUT level, > or > (2) have *exactly* the same interface > across all window systems (such as a > pointer to a native object). Just one pointer to a native object might be sufficient for windows (HWND), but on other systems you need more data. Under X11 for instance you need at least the Display pointer along with the Window. The best way to go if one would want to expose the underlying window system to the user, I guess would be to return a void* to "something" that can be a structure containing Display* and Window under X11, and HWND or possibly also HINSTANCE under windows, etc. A cleaner interface could be something like: void glutGetWM(int what, void *buf); with the first argument being GLUT_DISPLAY, GLUT_WINDOW, GLUT_GLCONTEXT, etc. Copying the appropriate data in each case to the buffer pointed by the second argument. Of course on win32 for instance glutGetWM(GLUT_DISPLAY, ...) would be a no-op, and so on. -- John Tsiombikas http://nuclear.sdf-eu.org/ ------------------------------------------------------------------------------ Come build with us! The BlackBerry(R) Developer Conference in SF, CA is the only developer event you need to attend this year. Jumpstart your developing skills, take BlackBerry mobile applications to market and stay ahead of the curve. Join us from November 9 - 12, 2009. Register now! http://p.sf.net/sfu/devconference _______________________________________________ Freeglut-developer mailing list Freeglut-developer@... https://lists.sourceforge.net/lists/listinfo/freeglut-developer |
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