Click here to Skip to main content
Click here to Skip to main content

FastPixel - A much faster alternative to Bitmap.SetPixel

, 15 Aug 2006
Rate this:
Please Sign up or sign in to vote.
Ever wanted something faster than SetPixel? Well, you've found it.

Sample Image - screenShot.jpg


I have been working on some graphics code lately, and have been quite irritated with SetPixel and its performance overheads. There is an alternative though: lock the bitmap and interact directly with an array of bytes each representing R, G, or B (and sometimes A, depending on whether it's an alpha bitmap or not).


Dim fp As New FastPixel(image)
fp.SetPixel(x, y, Color.Green)

What I've learnt

  • Using Bitmap.Width or Bitmap.Height during an intense operation is very slow, because GdipGetImageWidth (or GdipGetImageHeight) is used to retrieve the value, and it isn't cached.
  • Using this class introduces speeds over 20 times faster than using SetPixel, on average.


Use the class!

Sorry about the length of this article, but there isn't much to explain. It's quite basic, and I just wanted to get it out there so people could use it :>


This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

About the Author

Software Developer
United Kingdom United Kingdom
No Biography provided

Comments and Discussions

GeneralVery usefull piece of code Pinmembernmajor21-Apr-08 23:26 
QuestionWould like to use Fast Pixel but...why do I get this error? Pinmemberled1-Apr-08 12:23 
GeneralGreat code... but there may be an issue PinmemberStimphy17-Jan-07 8:36 
GeneralCounterpart code in MFC/GDI... [modified] PinmemberJun Du6-Jan-07 2:28 
GeneralA C# code translation of this utility Pinmemberratamoa19-Oct-06 10:43 
GeneralRe: A C# code translation of this utility PinstaffChristian Graus19-Oct-06 10:55 
GeneralRe: A C# code translation of this utility PinmemberAndrewVos19-Oct-06 23:31 
GeneralRe: A C# code translation of this utility PinmemberAndrewVos19-Oct-06 23:40 
Question1 bit conversion? Pinmemberbeckerben23-Aug-06 2:59 
AnswerRe: 1 bit conversion? [modified] PinmemberAlex@UEA24-Aug-06 0:04 
GeneralRe: 1 bit conversion? PinmemberAlex@UEA24-Aug-06 0:19 
GeneralRe: 1 bit conversion? Pinmemberbeckerben24-Aug-06 2:00 
GeneralRe: 1 bit conversion? PinmemberAlex@UEA24-Aug-06 3:43 
GeneralCorrection [modified] PinmemberAlex Fr16-Aug-06 3:55 
GeneralRe: Correction PinmemberAndrewVos16-Aug-06 6:01 
GeneralRe: Correction PinmemberAlex Fr16-Aug-06 6:32 
GeneralEasy of use Pinmembernorm .net15-Aug-06 23:17 
GeneralRe: Easy of use PinmemberAndrewVos16-Aug-06 0:25 
GeneralRe: Ease of use PinmemberDustin Metzgar16-Aug-06 2:46 
GeneralRe: Ease of use Pinmemberanomaly25-Oct-06 20:06 
GeneralRe: Easy of use Pinmemberaxelriet16-Aug-06 0:46 
GeneralRe: Easy of use Pinmembernorm .net16-Aug-06 0:54 

General General    News News    Suggestion Suggestion    Question Question    Bug Bug    Answer Answer    Joke Joke    Rant Rant    Admin Admin   

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.

| Advertise | Privacy | Mobile
Web03 | 2.8.140709.1 | Last Updated 16 Aug 2006
Article Copyright 2006 by AndrewVos
Everything else Copyright © CodeProject, 1999-2014
Terms of Service
Layout: fixed | fluid