2DGraphics vsync is slow

[stephaneweg]

Hi,

i have a little issue , and i dont know what is the cause. in my kernel i use 2DGraphics ; when i use the vsync option, it is verry slow, like 1 FPS , even if i draw a single rectangle ; it seems that the slow part is when it does "m_pFrameBuffer->WaitForVerticalSync();"

when i does not use the vsync option, it does a memcpy; and it's faster.

i what could be the cause of that ?

best regards