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PhotoChrome - Just Solve the File Format Problem

PhotoChrome

From Just Solve the File Format Problem
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(Added link to the official homepage of PhotoChrome (by Douglas Little))
m (Change telparia.com samples link to template)
 
Line 27: Line 27:
 
* [http://recoil.sourceforge.net/examples.zip RECOIL sample files] → PAROT2.PCS, TIGER.PCS
 
* [http://recoil.sourceforge.net/examples.zip RECOIL sample files] → PAROT2.PCS, TIGER.PCS
 
* [http://www.page6.org/st_lib/standard/st0788.php PhotoChrome] → BAY2.PCS, BETTY.PCS
 
* [http://www.page6.org/st_lib/standard/st0788.php PhotoChrome] → BAY2.PCS, BETTY.PCS
* https://telparia.com/fileFormatSamples/image/photoChrome/
+
* {{DexvertSamples|image/photoChrome}}
  
 
== Links ==
 
== Links ==

Latest revision as of 03:58, 28 December 2023

File Format
Name PhotoChrome
Ontology
Extension(s) .pcs

PhotoChrome (or PhotoChrome Screen) is a raster image file format used on Atari ST computers. It is associated with the PhotoChrome image viewer and converter software by Douglas Little. Later versions of PhotoChrome, from version 5, can only encode images and doesn't include a viewer.

Contents

[edit] Format

Files have a 6-byte fixed header. It is followed by several segments containing the palette and pixel data, which are RLE-compressed.

The image dimensions are always 320×200 pixels, but the first row is typically not used (apparently due to hardware limitations), making them effectively 320×199.

Some PhotoChrome files contain two separate images. On an actual Atari ST computer, the viewer would be expected to average them together using temporal dithering, to simulate more colors than the computer could actually display.

[edit] Identification

Files start with bytes 01 40 00 c8 (representing the width and height).

[edit] Software

[edit] Sample files

[edit] Links

[edit] External Links

Personal tools
Namespaces

Variants
Actions
Navigation
Toolbox

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