Based on work found on Visual C# Kicks: http://www.vcskicks.com/fast-image-processing.php
FastBitmap is a bitmap wrapper class that intends to provide fast bitmap read/write operations on top of a safe layer of abstraction.
It provides operations for setting/getting pixel colors, copying regions accross bitmaps, clearing whole bitmaps, and copying whole bitmaps.
Editing pixels of a bitmap is just as easy as:
Bitmap bitmap = new Bitmap(64, 64);
using(var fastBitmap = bitmap.FastLock())
{
// Do your changes here...
fastBitmap.Clear(Color.White);
fastBitmap.SetPixel(1, 1, Color.Red);
}Or alternatively, albeit longer:
Bitmap bitmap = new Bitmap(64, 64);
FastBitmap fastBitmap = new FastBitmap(bitmap);
// Locking bitmap before doing operations
fastBitmap.Lock();
// Do your changes here...
fastBitmap.Clear(Color.White);
fastBitmap.SetPixel(1, 1, Color.Red);
// Don't forget to unlock!
fastBitmap.Unlock();This project contains the FastBitmap class and acompanying unit test suite.
Note that to compile this class you must have the /unsafe compiler flag turned on in your project settings.
Note: This code currently only works with 32bpp bitmaps
FastBitmap is available as a Nuget package:
PM > Install-Package FastBitmapLib
The following profiling tests showcase comparisions with the native System.Drawing.Bitmap equivalent method calls
SetPixel profiling
1024 x 1024 Bitmap SetPixel: 2054ms
1024 x 1024 FastBitmap SetPixel: 398ms
1024 x 1024 FastBitmap Int SetPixel: 331ms
Results: FastBitmap 6,21x faster
GetPixel profiling
1024 x 1024 Bitmap GetPixel: 1498ms
1024 x 1024 FastBitmap GetPixel: 382ms
1024 x 1024 FastBitmap Int GetPixel: 327ms
Results: FastBitmap 4,58x faster
Bitmap copying profiling
1024 x 1024 Bitmap SetPixel: 2888ms
1024 x 1024 FastBitmap CopyPixels: 5ms
Results: FastBitmap 577,60x faster
Bitmap clearing profiling
1024 x 1024 Bitmap SetPixel: 1795ms
1024 x 1024 FastBitmap Clear: 5ms
Results: FastBitmap 359,00x faster