ttf2png - True Type Font to PNG converter
-Copyright (c) 2004-2008 Mikko Rasa, Mikkosoft Productions
+Copyright (c) 2004-2018 Mikko Rasa, Mikkosoft Productions
Software requirements
FreeType 2
-libpng 1.2
+libpng 1.6
C compiler (preferably GCC)
Command-line options
-r <low>,<high>
- Range of characters to convert, specified as unicode code points. The
- default is 0,255, matching the ISO-8859-1 (Latin-1) character set.
+ Range of code points to convert, specified as unicode code points. The
+ default is 0,255, matching the ISO-8859-1 (Latin-1) character set. Code
+ points can be specified as plain numbers, unicode code points (U+xxxx) or
+ UTF-8 characters. This option can be specified multiple times to add
+ more ranges to be converted.
-s <pixels>
Font size to use. The default is 10 pixels.
-l <num>
- Number of characters to put in one line. Defaults to autodetect. Ignored
+ Number of glyphs to put in one line. Defaults to autodetect. Ignored
if -p is used.
- -c <pixels>
- Character cell size. The special values auto and autorect may be used to
- choose an autodetected square or rectangle cell, respectively. Defaults to
- autodetected square. Ignored if -p is used.
+ -c <pixels>[x<pixels>]
+ Character cell size. If only a single number is given, a square cell is
+ used. The special values auto and autorect may be used to choose an
+ autodetected square or rectangle cell, respectively. The default is auto.
+ Ignored if -p is used.
-o <filename>
Output file name. Use - for stdout; the output is a png image, so it's
-i
Invert colors of the glyphs. When rendering to alpha channel, only the
- alpha channel is inverted.
+ alpha channel is inverted. The default is to render black glyphs on a
+ white background.
-v
Increase the level of verbosity.
each glyph is determined by its code point. Ignored if -p is used.
-p
- Pack the glyphs tightly in the image. One-pixel gaps are left between
- glyphs. By default glyphs are rendered in a regular grid. Creating a
- definition file is recommended, as the resulting image can seem rather
- messy.
+ Pack the glyphs tightly in the image. Small gaps are left between glyphs,
+ controlled by the -n option. By default glyphs are rendered in a regular
+ grid. Creating a definition file is recommended, as the resulting image
+ can seem rather messy.
+
+ -m <pixels>
+ Leave a margin around the edges of the generated image. By default glyphs
+ can touch the edges. Only used with -p.
+
+ -n <pixels>
+ Control the amount of padding between glyphs. The default is 1 pixel.
+ Only used with -p.
+
+ -f
+ Allow the resulting image to have a non-power-of-two size. By default the
+ image size is rounded up to a power of two for maximum compatibility.
-d
File name to write glyph definitions. See the section below for details.
file alongside the image.
The basic format is line-based. Empty lines, or those starting with a hash
-sign (#), should be ignored. Data lines consist of fields separated with
-spaces.
+sign (#), should be ignored. Data lines consist of a keyword followed by
+space-separated fields.
-The first data line contains five fields with overall information about the
-image and the font:
+The keyword "font" is followed by five fields with overall information about
+the image and the font:
Fields 1-2: width and height of the image
Field 3: nominal size of the font
Fields 4-5: ascent and descent of the font
-Subsequent data lines each describe a single glyph and contain eight fields:
+The keyword "glyph" is followed by eight fields describing a single glyph:
Field 1: the code point of the glyph
Fields 2-3: x and y position of the glyph in the image
Fields 6-7: x and y offset of the glyph from its base point
Field 8: advance from this glyph to the next
+The keyword "kern" is followed by three fields describing kerning between two
+glyphs:
+
+ Field 1: the code point of the left-hand glyph
+ Field 2: the code point of the right-hand glyph
+ Field 3: kerning distance between the glyphs
+
The following ASCII art image illustrates most of these metrics. Note that in
some fonts, not all of the glyphs fit completely inside the character box.
Changelog
next
+- Alternate ways of specifying code point ranges
+- Multiple code point ranges can be specified
+- Option to generate non-power-of-two images
+
+1.1
+- Controllable margin and padding in packed mode
+- Do not generate overly large images in sequential grid mode
+
+1.0
- Improve the packing algorithm
- Non-square cells for grid mode
- Option to invert colors
+- Include kerning information in definition file
0.3
- Restructure the code