Editing gray - FilterMeisterWiki

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ZZZZ ZZZ            ______ ZZZ  ZZZ  _____ 
 ZZ   Z            |  ____| ZZ   ZZ |_   _|
  ZZ Z    ##  ##   | |__    ZZ   ZZ   | |  
   ZZ     ### ##   |  __|   ZZZZZZZ   | |  
   ZZ     ######   | |      ZZ   ZZ  _| |_ 
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= gray =

== Syntax ==
{{int gray(int r, int g, int b, int rweight, int gweight, int bweight)}}

== Arguments ==
:'''r'''
::The Red pixel color value
:'''g'''
::The Green pixel color value
:'''b'''
::The Blue pixel color value
:'''rweight'''
::The weighting given to the red color in the grayscale algorithm
:'''gweight'''
::The weighting given to the green color in the grayscale algorithm
:'''bweight'''
::The weighting given to the blue color in the grayscale algorithm

== Return ==
The new grayscale pixel value.

== Description ==
Applies a simple grayscale effect to a given RGB pixel value, according to the weightings provided.

== Example ==
<code>
ctl[0]: "Red Weight", Range=(1,500), Val=250
ctl[1]: "Green Weight", Range=(1,500), Val=250
ctl[2]: "Blue Weight", Range=(1,500), Val=250

ForEveryTile: {
  int r, g, b;
  for (y = y_start; y < y_end; y++) {
    for (x = x_start; x < x_end; x++) {
       r = src(x,y,0);
       g = src(x,y,1);
       b = src(x,y,2);
       for (z=0; z < 3; z++) {
          pset(x,y,z, gray(r, g, b, ctl(0), ctl(1), ctl(2)));
       }
    }
  }
  return true;
}
</code>

== See Also ==
((blend)), ((contrast)), ((saturation))

Summary of change:
Add document to category: