blendop_grayscale()

Definition

INT blendop_grayscale ( <INT blendTable> , <INT mode> )

Modify the blend table by modifying the colours, so the compononts of one colour is the same (this makes them appear gray). This means that the graphic the blend operation is assigned to will appear gray.

The source section of the blend table will be modified; this will clear the destination section of the blend table.

Parameters

INT blendTable - The blend table to modify.
INT mode - The mode to perform the grayscaling (see notes).

Returns

INT : true

Modes

Method 1

component = 0.3*r+0.59*g+0.11*b;
colour = rgb ( component , component , component )

Method 2

max = r > g ? r > b ? r : g : g > b ? g : b;
min = r < g ? r < b ? r : g : g < b ? g : b;
component = ( max + min ) / 2 colour = rgb ( component , component , component )

Method 3

max = r > g ? r > b ? r : g : g > b ? g : b;
colour = rgb ( max , max , max )

blendop_free()blendop_identity()