TrueColorToPalette v 1.1

High-quality Jpeg to GIF conversion in ASP.NET

With this product you can convert a True Color image to palettized one using Floyd-Steinberg dithering algorithm. GDI+, by default, uses a halftone palette, that creates ugly looking, poor quality images. New algorithm gives images without grain looking just like original ones. This is especially useful for photography. In order to use the new conversion technique, you just need to copy one file. This is useful for hosting servers because you don't need to register any components.

Download TrueColorToPalette.zip

VB.NET Sample that creates GIF image and ouputs it to stream can be found here.

Compare two images

The image with new algorithm	The image with standard algorithm

 

Source code:

Gif.aspx

<%@ Page Language="VB" %>
<%@ import Namespace="System.Runtime.InteropServices" %>
<%@ import Namespace="System.Drawing.Drawing2D" %>
<%@ import Namespace="System.Drawing" %>
<%@ import Namespace="System.Drawing.Imaging" %>
<%@ import Namespace="System.Globalization" %>

<script runat="server">    
    Sub Page_Load
    
	dim img as Bitmap = new Bitmap(200,100,PixelFormat.Format24bppRgb)
	dim g as Graphics = Graphics.FromImage(img)
	dim p as Pen = new Pen(Color.Black,1)
	dim b as Brush = new SolidBrush(Color.Green)
	dim MS as System.IO.MemoryStream = new System.IO.MemoryStream()
		
	g.Clear(Color.White)
	g.FillRectangle(b,20,20,40,40)
	g.DrawRectangle(p,25,25,50,50)
		
         Dim dt As DateTime = DateTime.Now
	
	Dim drawFont As New Font("Arial", 22)
	Dim drawBrush As New SolidBrush(Color.Red)	
	Dim drawPoint As New PointF(75F, 50F)		

	g.DrawString(dt.ToString("T", DateTimeFormatInfo.InvariantInfo), _
		 drawFont, _
		 drawBrush, _
		 drawPoint)
         '=====================================================================        
         Dim bitmappal As Bitmap        
         Dim Conv As ConvertToPalette = New ConvertToPalette() 
         bitmappal = Conv.ConvertToPal(img,1,256)  
         '=====================================================================    
	bitmappal.Save(MS,ImageFormat.Gif)
		
	Dim buffer as byte() = MS.ToArray()		
		
	Response.Clear()
	Response.ContentType = "Image/Gif"				
	Response.OutputStream.Write(buffer,0,buffer.Length)
	Response.End() 
    
    End Sub 
    
Public Class ConvertToPalette

    ... skip ...
 

End Class

</script>

Features:

• Royalty-free for software and web site developers
• The easy installation. No need to register the component, just copy the file to bin directory
• Converts from True Color to palettized images
• Creates transparent GIF image
• Based on ASP Painter technology

Quick start instruction:

1. Copy TrueColorToPalette.dll file  into bin directory of ASP.NET project
2. Add class ConvertToPalette to project
3. Add namespace System.Drawing.Drawing2D, System.Drawing, System.Drawing.Imaging, System.Runtime.InteropServices
4. Create new instance of  ConvertToPalette class
5. Make new palette bitmap with ConvertToPal method
6. Save bitmap to a file or stream.

TrueColorToPalette purchase

Version	Price	RegSoft Product ID	Purhase and download
TrueColorToPalette Basic	$14.95	59428	download
TrueColorToPalette PRO	$34.95	59429	download
TrueColorToPalette Enterprise	$299.00	59430	download

 TrueColorToPalette Trial - Download now!

	Distribution package includes
	- TrueColorToPalette.dll file
	- ASP.NET and VB.NET samples

License Summary: Can be used freely for non-commercial purpose. 
     Limitation: no more than 16 colors in resulting image.


      TrueColorToPalette Basic - Purchase Now!

	Distribution package includes
	- TrueColorToPalette.dll file
	- ASP.NET and VB.NET samples
	- one site/workstation license

 License Summary: TrueColorToPalette Basic can be used for any purpose including the development of derivative products



TrueColorToPalette PRO - Purchase Now!

	Distribution package includes
	- TrueColorToPalette.dll file
	- ASP.NET and VB.NET samples
	- five sites/workstations license

 License Summary:  TrueColorToPalette Pro can be used for any purpose including the development of derivative products



TrueColorToPalette Enterprise - Purchase Now!

	Distribution package includes
	- TrueColorToPalette.dll file
	- ASP.NET and VB.NET samples
	- unlimited number of sites/workstations license

License Summary:  TrueColorToPalette Enterprise version can be used freely for any purpose

To order by phone, call (877)-REGSOFT and tell the product ID

Technical support: support@asppainter.com