Hi,
I am trying to create a simple SDL application which simply calls the
following function once every second
glClearColor( 1.0, 1.0, 1.0, 1.0 ); glClear(GL_COLOR_BUFFER_BIT);
SDL_GL_SwapBuffers();
I am running this code on Ubuntu 8.04 with compiz fusion running @ Gnome.
The problem here is that I see a flickering window where white colour
appears for a short duration.
This problem disappears when I disable compiz fusion. How can this be solved
?
-Abhinav–
Yogi Berra - “A nickel ain’t worth a dime anymore.”
You probably have double-buffering enabled, and need to clear both
buffers (ie, clear one, swap buffers, then clear again).
SAOn July 16, 2008 2:44:34 pm Abhinav Lele wrote:
Hi,
I am trying to create a simple SDL application which simply calls the
following function once every second
glClearColor( 1.0, 1.0, 1.0, 1.0 );
glClear(GL_COLOR_BUFFER_BIT); SDL_GL_SwapBuffers();
I am running this code on Ubuntu 8.04 with compiz fusion running @
Gnome.
The problem here is that I see a flickering window where white colour
appears for a short duration.
This problem disappears when I disable compiz fusion. How can this be
solved ?
thanks that worked … now i use something like this
SDL_GL_SwapBuffers(); glClearColor( 1.0, 1.0, 1.0, 1.0 );
glClear(GL_COLOR_BUFFER_BIT);
… do some drawing code …
SDL_GL_SwapBuffers();
I guess this should be okay if i am trying to show an animation.
-AbhinavOn Wed, Jul 16, 2008 at 10:50 PM, Stephen Anthony wrote:
On July 16, 2008 2:44:34 pm Abhinav Lele wrote:
Hi,
I am trying to create a simple SDL application which simply calls the
following function once every second
glClearColor( 1.0, 1.0, 1.0, 1.0 );
glClear(GL_COLOR_BUFFER_BIT); SDL_GL_SwapBuffers();
I am running this code on Ubuntu 8.04 with compiz fusion running @
Gnome.
The problem here is that I see a flickering window where white colour
appears for a short duration.
This problem disappears when I disable compiz fusion. How can this be
solved ?
You probably have double-buffering enabled, and need to clear both
buffers (ie, clear one, swap buffers, then clear again).
SA
SDL mailing list
SDL at lists.libsdl.org
http://lists.libsdl.org/listinfo.cgi/sdl-libsdl.org
–
Henny Youngman - “I told the doctor I broke my leg in two places. He told
me to quit going to those places.”
or is this better
glClearColor( 1.0, 1.0, 1.0, 1.0 ); glClear(GL_COLOR_BUFFER_BIT);
… do some drawing code …
SDL_GL_SwapBuffers(); glClearColor( 1.0, 1.0, 1.0, 1.0 );
glClear(GL_COLOR_BUFFER_BIT);
But i was wondering as to why is my window being cleared by X11 when i am
not moving the window or doing anything with it. Is it because of compiz (
when I am rendering at a interval of 1 second) ?On Thu, Jul 17, 2008 at 12:24 AM, Abhinav Lele <@Abhinav_Lele> wrote:
thanks that worked … now i use something like this
SDL_GL_SwapBuffers(); glClearColor( 1.0, 1.0, 1.0, 1.0 );
glClear(GL_COLOR_BUFFER_BIT);
… do some drawing code …
SDL_GL_SwapBuffers();
I guess this should be okay if i am trying to show an animation.
-Abhinav
On Wed, Jul 16, 2008 at 10:50 PM, Stephen Anthony wrote:
On July 16, 2008 2:44:34 pm Abhinav Lele wrote:
Hi,
I am trying to create a simple SDL application which simply calls the
following function once every second
glClearColor( 1.0, 1.0, 1.0, 1.0 );
glClear(GL_COLOR_BUFFER_BIT); SDL_GL_SwapBuffers();
I am running this code on Ubuntu 8.04 with compiz fusion running @
Gnome.
The problem here is that I see a flickering window where white colour
appears for a short duration.
This problem disappears when I disable compiz fusion. How can this be
solved ?
You probably have double-buffering enabled, and need to clear both
buffers (ie, clear one, swap buffers, then clear again).
SA
SDL mailing list
SDL at lists.libsdl.org
http://lists.libsdl.org/listinfo.cgi/sdl-libsdl.org
–
Henny Youngman - “I told the doctor I broke my leg in two places. He told
me to quit going to those places.”
–
Laurence J. Peter - “Originality is the fine art of remembering what you
hear but forgetting where you heard it.”
also now with the above code i still get a bit of flicker even when i render
at intervals of 10ms. The difference here is that I see a black band. I
believe this is because of me rendering irrespective of the monitor refresh
rate. If so how can I sync with it ?On Thu, Jul 17, 2008 at 12:31 AM, Abhinav Lele <@Abhinav_Lele> wrote:
or is this better
glClearColor( 1.0, 1.0, 1.0, 1.0 ); glClear(GL_COLOR_BUFFER_BIT);
… do some drawing code …
SDL_GL_SwapBuffers(); glClearColor( 1.0, 1.0, 1.0, 1.0 );
glClear(GL_COLOR_BUFFER_BIT);
But i was wondering as to why is my window being cleared by X11 when i am
not moving the window or doing anything with it. Is it because of compiz (
when I am rendering at a interval of 1 second) ?
On Thu, Jul 17, 2008 at 12:24 AM, Abhinav Lele <@Abhinav_Lele> wrote:
thanks that worked … now i use something like this
SDL_GL_SwapBuffers(); glClearColor( 1.0, 1.0, 1.0, 1.0 );
glClear(GL_COLOR_BUFFER_BIT);
… do some drawing code …
SDL_GL_SwapBuffers();
I guess this should be okay if i am trying to show an animation.
-Abhinav
On Wed, Jul 16, 2008 at 10:50 PM, Stephen Anthony wrote:
On July 16, 2008 2:44:34 pm Abhinav Lele wrote:
Hi,
I am trying to create a simple SDL application which simply calls the
following function once every second
glClearColor( 1.0, 1.0, 1.0, 1.0 );
glClear(GL_COLOR_BUFFER_BIT); SDL_GL_SwapBuffers();
I am running this code on Ubuntu 8.04 with compiz fusion running @
Gnome.
The problem here is that I see a flickering window where white colour
appears for a short duration.
This problem disappears when I disable compiz fusion. How can this be
solved ?
You probably have double-buffering enabled, and need to clear both
buffers (ie, clear one, swap buffers, then clear again).
SA
SDL mailing list
SDL at lists.libsdl.org
http://lists.libsdl.org/listinfo.cgi/sdl-libsdl.org
–
Henny Youngman - “I told the doctor I broke my leg in two places. He told
me to quit going to those places.”
–
Laurence J. Peter - “Originality is the fine art of remembering what you
hear but forgetting where you heard it.”
–
Bill Cosby - “Advertising is the most fun you can have with your clothes
on.”
Look at the SDL_GL_SetAttribute command with ‘SDL_GL_SWAP_CONTROL’.
Note that this doesn’t work on all systems yet.
SAOn July 16, 2008 4:38:23 pm Abhinav Lele wrote:
also now with the above code i still get a bit of flicker even when i
render at intervals of 10ms. The difference here is that I see a
black band. I believe this is because of me rendering irrespective of
the monitor refresh rate. If so how can I sync with it ?