![]() Part 2 - How to Convert JPG to ICO Onlineĭo you want to convert a JPG file to an ICO file? You don't need to download any software. This format can be opened with the help of the program ACDSee. It used to display files and folders in the graphical user interface (GUI) operating systems. This kind of file usually contains a small image icon of different resolutions and various color depths. The common sizes for an ICO formatted favicon are 16x16px, 32x32px, and 48x48px. The ICO file can be used for item icons in the start menu, shortcuts, directories, or for programs. Each layer of the favicon holds a different size of the image. The unique feature of an ICO file is that it is multilayered. Favicon.io Part 1 - What is An ICO?Īn ICO file is a special image file use by the browser. 'Service provided by Telerik ('Conversion powered by NRefactory.Part 2 - How to Convert JPG to ICO Online 1. ' png data must contain the whole png data file IconWriter.Write(CInt(memoryStream.Length)) If output Is Nothing OrElse iconWriter Is Nothing Then NewBitmap.Save(memoryStream, ImageFormat.Png)ĭim iconWriter = New BinaryWriter(output) ' save the resized png into a memory stream for future use Public Shared Function ConvertToIcon(inputBitmap As Bitmap, output As Stream, Optional size As Integer = 16, Optional preserveAspectRatio As Boolean = False) As Booleanĭim width As Single = size, height As Single = sizeĭim newBitmap = New Bitmap(inputBitmap, New Size(CInt(width), CInt(height))) ''' Wether or not the icon was succesfully generated ''' Needs to be a factor of 2 (16x16 px by default) ''' Converts a PNG image to an icon (ico) Using file = New FileStream(OptionalSave, FileMode.Create, System.IO.FileAccess.Write) ![]() If Not ConvertToIcon(bmp, outputStream, size) Then G.DrawString(UpgradeNum, New Font("Small Fonts", 6), Brushes.Aquamarine, 0, 0) The class with darkfall's code: Imports įunction GetIcon(Optional OptionalSave As String = "") As Icon Sample using a class I put that code in: Dim ico As New Icons With Since of course we don't support XP and lower this did it for us. Ruiwei Bu (darkfall) has a github gist showing how. If you have to dynamically generate icons (my app has a changing number), you'dīe out of luck if you had to use an editor anyway. Today you can generate a very good looking icon with this code. UPDATE: getting to be a very dated problem, XP is yesteryear. A good icon editor has the tools you need to make that work well enough. Particularly color reduction from 16 million to 256 or 16 colors is a non-trivial operation with multiple ways to do it, none of them perfect. Which should include multiple images in different sizes and color depths so they'll work well with any video adapter setting and any operating system version. In general you'll need to use an icon editor to create good icons. The Bitmap or Icon classes do not have an option to get a better result. This tends to generate disappointing results, to put it mildly. So what you get is an icon with only 16 colors, using a pre-cooked palette with basic colors. Operating systems that did not yet support fancy icons. Including the old ones, Windows 98 and Windows 2000. Bitmap.GetHicon() is very good at creating icons that work well on any Windows version that can run.
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