For BMFont binary format please read BMFont Binary Format
This section describes the contents of the BMFont output format used by Glyph Designer. The BMFont format was originally created by Andreas Jönsson and can be found at http://www.angelcode.com. Information about BMFont format was taken from information found on that page.
Glyph Designer provides a number of different output options:
In the drop down list of export types the list is a little longer as it also lists some different file extensions as well e.g. .txt and .xml. Regardless of the file extension, if BMFont is mentioned in the export type then the contents of the export will adhere to the BMFont format, but laid out as required by the format being used e.g. text or XML.
This article will cover the contents of BMFont output. It will not specifically cover the Sprite Kit export format which is proprietary to Glyph Designer, but the contents of that file format are the same as BMFont, but not formatted in the same way.
|face||Fonts display name|
|bold||1 = bold, 0 = not bold|
|italic||1 = italic, 0 = not italic|
|charset||Not used by Glyph Designer|
|unicode||Always set to 1 as all glyphs use unicode|
|stretchH||Fonts height stretch. Always 100%|
|smooth||Not used by Glyph Designer|
|aa||Always 1 in Glyph Designer|
|padding||The padding within each glyph image (up, right, down, left)|
|spacing||The spacing between each glyph image on the texture atlas (horizontal, vertical)|
|outline||Not used by Glyph Designer|
|lineHeight||The distance in pixels between each line of text|
|base||The number of pixels from the top of the glyph to the base line|
|scaleW||Not used by Glyph Designer|
|scaleH||Not used by Glyph Designer|
|pages||Always 1 when using Glyph Designer|
|packed||Not used by Glyph Designer|
This tag gives the name of the texture file to be used with this control file
|id||The page id which is always 0 for Glyph Designer|
|file||Filename of the texture file to use|
This tag describes the characters and glyphs within a font. There is one for each character in the font.
|id||The characters unicode id|
|x||x location for the top left corner glyph image in the texture atlas|
|y||y location for the top left corner glyph image in the texture atlas|
|width||Width of the glyph image within the texture atlas|
|height||Height of the glyph image within the texture atlas|
|xoffset||How much to adjust the x position of the glyph when rendering it defined by font metrics|
|yoffset||How much to adjust the y position of the glyph when rendering it defined by font metrics|
|xadvance||How far to advance the x position to render the next glyph in the string|
|page||Not used by Glyph Designer|
|chnl||Not used by Glyph Designer|
The kerning information is used to adjust the distance between glyphs between certain characters. This allows letters such as o to sit under W e.g.
|first||The first character id|
|second||The second character id|
|amount||Amount to adjust the x position for the character +/-|