3/2/2023 0 Comments Hex fiend hex editor turotialIn HexFiend this can be found in the Views menu, under Byte Grouping > Single, in GHex it's in the View menu, under Group Data As > Bytes. Lastly, in order to make it easier to follow along with this tutorial, you want to make sure you editor is set to display bytes as individual units rather than grouping them together. We want to create new bytes, so we'll need to make sure our editor's mode is set to allow that, on HexFiend you can find this in the Edit menu, under Mode > Insert, in GHex you can toggle this on under Edit > Insert Mode. Again, because of a hex editor's typical usage, the default mode tends to be either "ready only" or "overwrite", which allows you to edit the bytes that are there, but not add or create new ones. Once you've got your hex editor open you'll need to make sure the mode is set correctly. This is the case with GHex on Linux for example, so you'll want to create an empty file first (by running touch test.bmp in the terminal for example). Most hex editors will let you start create a new file, but because their purpose is typically to inspect or edit files, some require an pre-existing file to start with. The first hex editor I used was 010 Editor on Windows, later, HexFiend on Mac and GHex on Linux. There are loads of free hex editors out there you can download. Naturally, glitch artist typically use them for intentionally corrupting files and we'll be using them for the ridiculous task of creating a file from scratch. They're typically used by programmers for debugging, often when a file has been unintentionally corrupted. A hex editor is a tool that allows you to view and edit the raw data of any file. In order to create a file from raw bytes we will need a hex editor. Similarly Evan Meany’s Ceibas Cycle project contains case studies for different video file type artifacts (you will need Flash player enabled on your browser). Glitch artist Rosa Menkman has documented different image file type artifacts in her pdf the Vernacular of File Formats. On the surface a JPG, PNG and BMP file might all look the same, but because their data is encoded differently, when that data gets corrupted they glitch very differently. That said, it's worth noting that for the purposes of glitch art, I personally find the compression artifacts that result from databending a file type with fancier encoding/compression algorithms more aesthetically interesting. So instead, we'll opt for creating a BMP file, which is a very simple image file format where there usually exists a one-to-one mapping between the bytes in the file and the pixels on the screen. This is known as lossy compression and it's astronomically tedious to do by hand (though perhaps I'll try to write that tutorial one day). contain as few bytes of data as possible). Each encodes the pixel data differently, usually in an effort to maintain the integrity of the image while also making the file as small as possible (ie. There are many different kinds of image files, JPG, PNG, GIF, etc. What follows is an updated version of a blog post I wrote for Art 21 back in 2011. This is a somewhat masochistic endeavor, but personally I've found learning to write files from scratch (a task usually reserved for a class of programs known as "encoders") has helped me to better understand the nature of files which in turn has given mean loads of ideas for how to break them in interesting ways. In fact if you told a programmer that you created an image from scratch, one byte at a time, they would probably think you were crazy, and maybe you are a little crazy. Though it wouldn't be accurate to call this databending or glitch art, it isn't exactly programming either. In this section I'm going to walk you through creating an image file from scratch.
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