Difference between revisions of "SCI/Specifications/Graphics/Font resource"
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(Merging of the SCI documentation) |
m (Improved table formatting) |
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SCI font resources remained unchanged during the SCI revisions and were still used in SCI32. Their format is relatively straightforward and completely sufficient for any 8 or even 16 bit character table: | SCI font resources remained unchanged during the SCI revisions and were still used in SCI32. Their format is relatively straightforward and completely sufficient for any 8 or even 16 bit character table: | ||
{| border="1" | {| border="1" cellspacing="0" cellpadding="5" | ||
|+ | |||
|'''Offset''' | |'''Offset''' | ||
|'''Type''' | |'''Type''' | ||
| Line 29: | Line 30: | ||
''HEIGHT'' does not affect the height of a character, though- it only tells the interpreter how far to move downwards when displaying a line of text. The characters referenced to starting at offset 6 are encoded as follows: | ''HEIGHT'' does not affect the height of a character, though- it only tells the interpreter how far to move downwards when displaying a line of text. The characters referenced to starting at offset 6 are encoded as follows: | ||
{| border="1" | {| border="1" cellspacing="0" cellpadding="5" | ||
|+ | |||
|'''Offset''' | |'''Offset''' | ||
|'''Type''' | |'''Type''' | ||
Latest revision as of 09:20, 31 January 2009
The SCI font resource
SCI font resources remained unchanged during the SCI revisions and were still used in SCI32. Their format is relatively straightforward and completely sufficient for any 8 or even 16 bit character table:
| Offset | Type | Meaning |
| 0 | 16bit integer, little endian encoding | Always zero (?) |
| 2 | 16bit integer, little endian encoding | NUMCHAR: Number of characters |
| 4 | 16bit integer, little endian encoding | HEIGHT: Number of pixel lines per text line |
| 6+NR*2 | 16bit integer, little endian encoding | Absolute offset of the character #NR, where 0 <= NR < NUMCHAR |
HEIGHT does not affect the height of a character, though- it only tells the interpreter how far to move downwards when displaying a line of text. The characters referenced to starting at offset 6 are encoded as follows:
| Offset | Type | Meaning |
| 0 | unsigned 8 bit integer | character HEIGHT |
| 1 | unsigned 8 bit integer | character WIDTH |
| 2... | bitmask, size HEIGHT * round up(WIDTH / 8) | Bitmask for the character |
The bitmap consists of HEIGHT lines of n bytes, where n equals the number of bytes required for storing WIDTH bits. Data is stored with the MSB first, in little-endian encoding (first byte describes the 8 leftmost pixels), where a pixel is drawn if the bit it corresponds to is set.