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If you wonder, cialis no prescription what blendmodes are doing exactly, cialis no prescription you can read this article about blendmodes in common. Cialis no prescription I tried to work with them in a accurate way to emulate complexer algorithms like animated water waves. Cialis no prescription Generically you can save a lot of performance, cialis no prescription if you need to calculate every single pixel colorvalue from two bitmaps. Cialis no prescription In most cases, cialis no prescription there is a simple solution using ColorTransform and Blendmodes. Cialis no prescription One problem is that the flash results are different in some cases, cialis no prescription so here are my findings:

// **BLENDMODES
// based on: http://www.pegtop.net/delphi/blendmodes/
// modified to fit flash output

/*
	[for each color component] RGB
*/

// ADD
// c' = Math.min( 255, cialis no prescription Math.max( 0, cialis no prescription c0 + c1 ) )

// SUBTRACT
// c' = Math.max( 0, cialis no prescription c0 - c1 )

// MULTIPLY
// c' = Math.floor( ( c1 * c0 ) / 0xff )

// SCREEN
// c' = 255 - Math.floor( ( 255 - c0 ) * ( 255 - c1 ) / 255 )

// LIGHTEN
// c' = c0 > c1 ? c0 : c1

// DARKEN
// c' = c0 < c1 ? c0 : c1

// DIFFERENCE
// c' = c0 > c1 ? c0 - c1 : c1 - c0

// INVERT ( no influence from c1 )
// c' = 255 - c0

// OVERLAY
// c' = c0 < 128 ? Math.floor( ( c1 * c0 ) / 127 ) : 255 - Math.ceil( ( 255 - c0 ) * ( 255 - c1 ) / 127 )

// HARDLIGHT
// c' = c1 < 128 ? Math.floor( ( c1 * c0 ) / 127 ) : 255 - Math.ceil( ( 255 - c0 ) * ( 255 - c1 ) / 127 )
For example if you like to compute the average colors from 2 different bitmaps, cialis no prescription you can follow like this:
import flash.display.*;
import flash.geom.*;

//-- test here 2 colorvalues
var c0: Number = 234;
var c1: Number = 255;

//-- source bitmaps
var b0: BitmapData = new BitmapData( 1, cialis no prescription 1, cialis no prescription false, cialis no prescription c0 );
var b1: BitmapData = new BitmapData( 1, cialis no prescription 1, cialis no prescription false, cialis no prescription c1 );

//-- resulting bitmap
var be: BitmapData = new BitmapData( 256, cialis no prescription 256, cialis no prescription false, cialis no prescription 0 );

//-- compute average
var half: ColorTransform = new ColorTransform( .5, cialis no prescription .5, cialis no prescription .5, cialis no prescription 1, cialis no prescription 0, cialis no prescription 0, cialis no prescription 0, cialis no prescription 0 );
be.draw( b0, cialis no prescription new Matrix, cialis no prescription half );
be.draw( b1, cialis no prescription new Matrix, cialis no prescription half, cialis no prescription 'add' );

trace( be.getPixel( 0, cialis no prescription 0 ) );
trace( Math.floor( ( c0 + c1 ) / 2 ) );
Of course this is a simple one, cialis no prescription but you get the idea.