History of contrast

== Syntax ==

int contrast(int pixel, int contrast)

== Arguments ==

:pixel

::The pixel color value the contrast algorithm will be applied to.

:contrast

::The amount of contrast to apply on a range of -127 to 128, with 0 meaning no contrast adjustment.

== Return ==

The new pixel color value after contrast is applied.

== Description ==

Applies a simple contrast effect to a given pixel value.

== Example ==

<code>

ctl[0]: "Contrast", Range=(-127,128), Val=0

ForEveryTile: {

for (y = y_start; y < y_end; y++) {

for (x = x_start; x < x_end; x++) {

for (z=0; z < 3; z++) {

pset(x,y,z, contrast(src(x,y,z), ctl(0)));

}

}

}

return true;

</code>

== See Also ==

blend, gamma, gray, saturation