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#1 Theses   Members   

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Posted 26 November 1999 - 12:01 PM

currently i have
32 bit color

// clear out back buffer
UCHAR * back_buffer = (UCHAR*)ddsd.lpSurface;
if (ddsd.lPitch == (SCR_WIDTH *4))
memset(back_buffer,0,SCR_HEIGHT*ddsd.lPitch)
else
{
for (int y=0; y {
memset(back_buffer,0,SCR_WIDTH*4);
back_buffer += ddsd.lPitch;
}
}

this works just fine however when i change back_buffer to a UINT* and then change back_buffer += ddsd.lPitch to
back_buffer += (ddsd.lPitch >> 2)

with this change the bitmap still displays in the right place but it experiences what i believe is called shearing
after the if else statement if i had
back_buffer = (UINT*)ddsd.lpSurface
everything is fine
i just don't understand whats going on





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