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Altera_Forum's avatar
Altera_Forum
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14 years ago

VGA Sprite Blur

I wrote some VGA vhdl that displays sprites by constantly drawing RGB values from memory by bitbanging the VGA protocol. At each clock cycle I have the right XY RGB values corresponding to the position on the screen.

Whenever I move sprites on my screen they blur a significant amount. When I write similar code in OpenGL there is no blurring.

I was wondering if anybody had any experience with this effect or could offer any suggestions on how to prevent this blurring.

1 Reply

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    14 years ago

    Hi,

    Blur could be caused by memory access conflict, do many masters access the buffer memory only when your sprite is moving ?

    If the blur is just a slight tearing, then do you use a single buffer ? Double buffering would avoid that.