7.6 KiB
Terrarum Sans Bitmap
(note—you can't display Bulgarian and Russian glyphs at the same time, you must reload() them upon the change of locale of your game)
This font is a bitmap font used in my game project called Terrarum (hence the name). The font supports more than 90 % of european languages, as well as Chinese, Japanese and Korean. More technical side, it supports Latin-1 Supplement, Latin Ext-A, Latin Ext-B, Cyrillic (Russian, Bulgarian, Serbian), Greek, Chinese (limited to Unicode BMP), Japanese, Korean (all 11 172 possible syllables).
The code for the fonts are meant to be used with Slick2d (extends Font class). If you are not using the framework, please refer to the Font metrics section to implement the font metrics correctly on your system.
The issue page is open. If you have some issues to submit, or have a question, please leave it on the page.
Contribution guidelines
You can contribute to the font by fixing wrong glyphs, suggesting better ones, extending character set (like Georgian and Thai), or code for other game frameworks such as LibGDX. Please leave pull request for that.
Font Spritesheets are stored in assets/graphics/fonts directory. Image format must be TGA with Alpha — no PNG. If someone needs PNG, they can batch-convert the font using utils like ImageMagick.
Using on your game
- Firstly, place the .jar to your library path and unzip spritesheets, then:
Using on LibGDX
On your code (Kotlin):
class YourGame : Game() {
lateinit var fontGame: Font
override fun create() {
fontGame = GameFontBase(path_to_assets)
...
}
override fun render() {
batch.begin()
...
fontGame.draw(batch, text, ...)
...
batch.end()
}
}
On your code (Java):
class YourGame extends BasicGame {
Font fontGame;
@Override void create() {
fontGame = new GameFontBase(path_to_assets);
...
}
@Override void render() {
batch.begin();
...
fontGame.draw(batch, text, ...);
...
batch.end();
}
}
Using on Slick2d
On your code (Kotlin):
class YourGame : BasicGame("YourGameName") {
lateinit var fontGame: Font
override fun init(gc: GameContainer) {
fontGame = GameFontBase(path_to_assets)
...
}
override fun render(gc: GameContainer, g: Graphics) {
g.font = fontGame
g.drawString(...)
}
}
On your code (Java):
class YourGame extends BasicGame {
Font fontGame;
@Override void init(GameContainer gc) {
fontGame = new GameFontBase(path_to_assets);
...
}
@Override void render(GameContainer gc, Graphics g) {
g.setFont(fontGame);
g.drawString(...);
}
}
Font metrics
Although the font is basically a Spritesheet, some of the sheet expects variable widths to be supported. Any sheets with _variable means it expects variable widths. Anything else expects fixed width (regular Spritesheet behaviour). cjkpunct has width of 10, kana and hangul_johab has width of 12, wenquanyi has width of 16.
Parsing glyph widths for variable font sheets
Width is encoded in binary bits, on pixels. On the font spritesheet, every glyph has vertical dots on their top-right side (to be exact, every (16k - 1)th pixel on x axis). Above image is a sample of the font, with width information coloured in magenta. From top to bottom, each dot represents 1, 2, 4 and 8. For example, in the above image, ! (exclamation mark) has width of 5, " (double quote) has width of 6, # (octothorp) has width of 8, $ (dollar sign) has width of 9.
Implementing the Korean writing system
On this font, Hangul letters are printed by assemblying two or three letter pieces. There are 10 sets of Hangul letter pieces on the font. Top 6 are initials, middle 2 are medials, and bottom 2 are finals. On the rightmost side, there's eight assembled glyphs to help you with (assuming you have basic knowledge on the writing system). Top 6 tells you how to use 6 initials, and bottom 2 tells you how to use 2 finals.
This is a Kotlin-like pseudocode for assembling the glyph:
function getHanChosung(hanIndex: Int) = hanIndex / (21 * 28)
function getHanJungseong(hanIndex: Int) = hanIndex / 28 % 21
function getHanJongseong(hanIndex: Int) = hanIndex % 28
jungseongWide = arrayOf(8, 12, 13, 17, 18, 21)
jungseongComplex = arrayOf(9, 10, 11, 14, 15, 16, 22)
function getHanInitialRow(hanIndex: Int): Int {
val ret: Int
if (isJungseongWide(hanIndex))
ret = 2
else if (isJungseongComplex(hanIndex))
ret = 4
else
ret = 0
return if (getHanJongseong(hanIndex) == 0) ret else ret + 1
}
function isJungseongWide(hanIndex: Int) = jungseongWide.contains(getHanJungseong(hanIndex))
function isJungseongComplex(hanIndex: Int) = jungseongComplex.contains(getHanJungseong(hanIndex))
function getHanInitialRow(hanIndex: Int): Int {
val ret: Int
if (isJungseongWide(hanIndex))
ret = 2
else if (isJungseongComplex(hanIndex))
ret = 4
else
ret = 0
return if (getHanJongseong(hanIndex) == 0) ret else ret + 1
}
function getHanMedialRow(hanIndex: Int) = if (getHanJongseong(hanIndex) == 0) 6 else 7
function getHanFinalRow(hanIndex: Int): Int {
val jungseongIndex = getHanJungseong(hanIndex)
return if (jungseongWide.contains(jungseongIndex))
8
else
9
}
function isHangul(c: Char) = c.toInt() >= 0xAC00 && c.toInt() < 0xD7A4
...
for (each Char on the string) {
if (isHangul(Char)) {
val hIndex = Char.toInt() - 0xAC00
val indexCho = getHanChosung(hIndex)
val indexJung = getHanJungseong(hIndex)
val indexJong = getHanJongseong(hIndex)
val choRow = getHanInitialRow(hIndex)
val jungRow = getHanMedialRow(hIndex)
val jongRow = getHanFinalRow(hIndex)
// get sub image from sprite sheet
val choseongImage = hangulSheet.getSubImage(indexCho, choRow)
val jungseongImage = hangulSheet.getSubImage(indexJung, jungRow)
val jongseongImage = hangulSheet.getSubImage(indexJong, jongRow)
// actual drawing part
draw choseongImage to somewhere you want
draw jungseongImage on top of choseongImage
draw jongseongImage on top of choseongImage
}
...
}
Acknowledgement
Thanks to kind people of /r/Typography for amazing feedbacks.
CJK Ideographs are powered by WenQuanYi Font. The font is distributed under the GNU GPL version 2. Although the glyphs themselves are not copyrightable (the program codes—e.g. TTF—do), we would like to give a credit for the font and the people behind it.