【转帖】problem with fast draw 9double buffer0
 

problem with fast draw (double buffer)

problem with fast draw (double buffer)
hi there,
i've developed a mfc application for viewing dwg files using dwgdirect 1.11 library. i/m trying to improve the speed of displaying the drawing.
i also checked the sample application odamfcappdll, in that, the drawing is displayed very fast as compared to the singledocapp, which is also supplied with this library(when the double buffer optin is set).
i've also noticed that doublebufferenabled is set like this:
pprops->putat("doublebufferenabled", odrxvariantvalue(true));
i tried to load the library wingdi.gs using the function
m_gsmoduleid = ::odrxdynamiclinker()->loadmodule("wingdi.gs");
but the m_gsmoduleid should be 2, for a successful loading of the library.
i'm always getting 0.
its showing an error message invalid input oderror: no. 5
can anyone say the solution for this..
regards,
rajesh parameswaran
last edited by rajuinnet; 15th july 2004 at 02:31 amfff">.

rajuinnet
# 15th july 2004, 09:49 am

moderator join date: mar 2002
posts: 2,994
double buffering can be used only with gl devices.
wingdi.gs may be not loaded because it's absent in right location or has incompartible version.
sergey slezkin

sslezkin
# 15th july 2004, 09:55 pm

registered user join date: jul 2004
location: india
posts: 82


hi mr.sergey slezkin,
thank you for u'r response. i have solved the problem of double buffering without using the gl libraries.
when i set the double buffer option, by the following code snippet.
pproperties->putat( "doublebufferenabled", odrxvariantvalue
(theapp.doublebufferenabled()));
the value of 'theapp.doublebufferenabled()' will always be zero.
so i tried to set it to true.
and when i executed, it starts throwing assertions, something like invalid input: error 5 from the oderror exception class.
i solved by this:
i've to set one more parameter. i.e
m_pdevice->setusergicontext(this);
when this option is set, we can implement double buffer without loading the gl library. this option must be set before enabling the double buffer.
thank you very much for u'r response.
-------------------------------------------
regards,
rajesh parameswaran.

rajuinnet

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double buffering can be used only with gl devices.
wingdi.gs may be not loaded because it's absent in right location or has incompartible version.
sergey slezkin


hi mr.sergey slezkin,
thank you for u'r response. i have solved the problem of double buffering without using the gl libraries.
when i set the double buffer option, by the following code snippet.
pproperties->putat( "doublebufferenabled", odrxvariantvalue
(theapp.doublebufferenabled()));
the value of 'theapp.doublebufferenabled()' will always be zero.
so i tried to set it to true.
and when i executed, it starts throwing assertions, something like invalid input: error 5 from the oderror exception class.
i solved by this:
i've to set one more parameter. i.e
m_pdevice->setusergicontext(this);
when this option is set, we can implement double buffer without loading the gl library. this option must be set before enabling the double buffer.
thank you very much for u'r response.
-------------------------------------------
regards,
rajesh parameswaran.