[SDL] png transparency in testgl.c from sdl package

image28 image28 at slingshot.co.nz
Sun Dec 12 19:13:37 PST 2010

changing the line glColor4ub(0,0,0,255); to glColor4ub(0,0,0,128); makes all images 50% transparent. for some reason it is using the colour setting from that line instead of the individual pixels colour in the texture.

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