rotate operation and cpu usage

[ersin.ozkan]

hi;

i have a little problem about rotate operation and cpu usage. i have 3 images in my application that i use to draw scrolling graphs. i update first line of images and memcpy line i to i+1. when i do that with no rotate operation; which makes my graphs like waterfall, scrolling from up to down; my cpu usage is almost 0. but i need it to be from right to left. i use rotate operation to do that but each image causes like %13 cpu usage ; which is trouble for my application for the future".

scanline function works for horizontal line of qimage and i couldnt find an horizontal line scanning operation. (i think it is because of how images being kept in memory)

can you give me some advice about what should i do to see almost 0 cpu usage.
using opengl will work?
and plx dont refer to "qwt" ^ ^

have a nice day everyone;

[aamer4yu]

How about copying transpose your image to another image. Then you can scanLine from this transpose image and draw vertical pixels over ur display area...

hope i make sense

[ersin.ozkan]

any more idea? ^ ^