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Created page with "The font stores all characters the game uses for drawing text. There are two types of characters: Narrow characters are 8x16 px in size (two tiles), and wide characters are 16x16 px in size (four tiles). '''Warning:''' In Boktai 1, wide characters are structured differently than described here. In Boktai 1, each wide character is 0x48 bytes in size, whereas in Boktai 2 and 3 each wide character is 0x80 bytes in size. The format of Boktai 1 wide characters still needs to..." |
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The font stores all characters the game uses for drawing text. There are | The font stores all characters the game uses for drawing text. There are three different types of characters: | ||
''' | * Narrow characters are 8x16 px in size (two tiles) | ||
* Wide characters in Boktai 2 and Boktai 3 are 16x16 px in size (four tiles). | |||
* Wide characters in Boktai 1 are '''13x12 px in size''' (one custom tile, implemented in software by Boktai 1. Only 12x12 px are stored in the ROM, the final pixel in each row is computed depending on the pixel to the left) | |||
The font is stored in the directory with id_low=0x6d24, id_high=0xa705 in the [[master file table]]. That directory will contain a single font file with id=0x3f51. | |||
= File format = | = File format = | ||
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</syntaxhighlight> | </syntaxhighlight> | ||
= Wide characters = | = Wide characters (Boktai 2/3) = | ||
The font can also provide arbitrarily many | The font can also provide arbitrarily many 16x16 px characters. These are referenced from strings using a two-byte sequence, stored in big-endian byte order, with the top bit of the first byte set. For example, to reference the wide character 0x123, the string should contain the two bytes <code>0x81 0x23</code>. The first wide character has index 0: | ||
<syntaxhighlight lang="c"> | <syntaxhighlight lang="c"> | ||
void | void DrawWideCharacter(int x, int y, char* text, FontHeader* font) { | ||
char high = text[0]; | char high = text[0]; | ||
char low = text[1]; | char low = text[1]; | ||
int charIndex = ((high & 0x7f) << 8) | low | // Combine the two bytes, and clear the top bit | ||
int charIndex = ((high & 0x7f) << 8) | low; | |||
// Each tile is | // Each tile is 0x20 bytes in size, a wide character is 2x2 tiles in size, | ||
// giving a total size of 0x80 bytes per character | // giving a total size of 0x80 bytes per character | ||
u8* tileStart = (u8*)font + font->offsetToWideChars + charIndex*0x80; | u8* tileStart = (u8*)font + font->offsetToWideChars + charIndex*0x80; | ||
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} | } | ||
</syntaxhighlight> | </syntaxhighlight> | ||
= Wide characters (Boktai 1) = | |||
Similar to Boktai 2/3, but each character is 13x12 px in size, and constructed from a single custom 12x12 px 4bpp tile (= 0x48 bytes per tile). The rightmost pixel in each row is computed from the pixel to the left of it. | |||
[[Category:Documentation]] [[Category:File formats]] | [[Category:Documentation]] [[Category:File formats]] | ||
[[Category:Boktai 1]] [[Category:Boktai 2]] [[Category:Boktai 3]] | [[Category:Boktai 1]] [[Category:Boktai 2]] [[Category:Boktai 3]] | ||