EDN Admin
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Hi everyone!
Im working on GDI+ (System.Drawing) on a Winform platform. My job is draw visualization for an audio player. Its simple a 16-bars visualizations. When everything is ok (it runs fine) then the cpu usage is 50% constant when it runs.
This is the code
rivate sub Ref (a as object, e as eventargs) handles T.tick
UpdateRectangles()
W.Invalidate()
End Sub
Private sub Paint (a as object, e as painteventargs) handles W.Paint
for each r as rectangle in bars
e.graphics.fillrectangle(bx,r)
next
End Sub
Where r is a collection of rectangle, and it will be refreshed to get new values corresponding to audio wave frequencies (UpdateRectangles). The timer have an interval of 10ms.
Compare with Wmplayer, it draws a lot more than 16 rectangles with cpu utilization above 10%, and in media player SDK says taht we can use GDI to draw.
So is there a way to draw, without utilization much cpu like the way Wmplayer do it?
Call me Zenocoding
View the full article
Im working on GDI+ (System.Drawing) on a Winform platform. My job is draw visualization for an audio player. Its simple a 16-bars visualizations. When everything is ok (it runs fine) then the cpu usage is 50% constant when it runs.
This is the code
rivate sub Ref (a as object, e as eventargs) handles T.tickUpdateRectangles()
W.Invalidate()
End Sub
Private sub Paint (a as object, e as painteventargs) handles W.Paint
for each r as rectangle in bars
e.graphics.fillrectangle(bx,r)
next
End Sub
Where r is a collection of rectangle, and it will be refreshed to get new values corresponding to audio wave frequencies (UpdateRectangles). The timer have an interval of 10ms.
Compare with Wmplayer, it draws a lot more than 16 rectangles with cpu utilization above 10%, and in media player SDK says taht we can use GDI to draw.
So is there a way to draw, without utilization much cpu like the way Wmplayer do it?
Call me Zenocoding
View the full article
