***BOGO*** Re: Images in GTK over DirectFB - delay in image transitions

Hi,

I also tried a sequence in which i create next frame before hand. ie

on startup:

create window1

show window 1

create window2

on next

show window2

create window3

Similarly on subsequent next clicks. I see no improvement. In the above sequence only show window was the work, which made me think that show may be taking most of the time in transition.

I am not able to use the sequence you mentioned since I use GtkImage and not GtkDrawingArea.

On Wed, Aug 27, 2008 at 7:53 PM, richard boaz <ivor.boaz@xxxxxxxxx> wrote:

Hi,

Try a different sequence, if possible:

at startup, create window and drawing area to display image

never destroy window and drawing area, except on application exit

on next:
3.1 destroy previous image
3.2 create next image for display

invoke the expose callback on the drawing area to display image from 3.2
With this sequence, you are guaranteed that the only work required is to create the next image and display it, i.e., the absolute minimum of work required.

richard

2008/8/27 Harinandan S <harinandans@xxxxxxxxx>

Hi All,

I am implementing a image viewer using GTK on DirectFB on an embedded ARM. When i press next i should get a new image. At present i am putting an image(VGA size) in a window and destroying the window and creating a new window with next image. I see that its taking a lot of time in transition.

At present my sequence is :

when next button is pressed -

          1. Create new window with new image.

          2. Show new window

          3. Destroy old window

I thought old window will still be shown until new window is created so transition will be smooth. But still transition is taking time.

Is there any better way to do this so that the transition is smooth?

--
Regards,
Harinandan S

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Regards,
Harinandan S

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BOGO Re: Images in GTK over DirectFB - delay in image transitions