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sack::image::do_vlineAlpha Variable
C++
IMAGE_PROC_D void (__cdecl * do_vlineAlpha)(Image pImage, S_32 x, S_32 yfrom, S_32 yto, CDATA color);
Parameters 
Description 
Image 
the image to draw to 
the x coordinate of the line (how far over to draw it) 
y_from 
Y coordinate to draw from 
y_to 
Y coordinate to draw to 
color 
the color of the line (alpha component of the color will be applied) 

This is a function pointer that references a function to do optimized vertical lines with alpha blending. The function pointer is updated when SetBlotMethod() is called.

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