Matrix-orbital GLK24064-25 Legacy Manual do Utilizador descarregar pdf (Página 32)

Figure 20: Bitmaps for h, i, and j

Now the bitmaps have to be converted to bytes. If the font is 8 bits high, it becomes a fairly simple job

because each vertical column is simply one byte (lsb at the top). In this case, however, the font is only 7 bits

high so the bytes ’wrap around’.

Figure 21: Bytes for a 7 Bit High Font

We’ve marked in the bits that are set for the letter "h". Remember that the bytes are ’inverted’, i.e., the

LSB is at the top. Each byte is shown in a different colour in the diagram. When the bytes are straightened

out, it’s simple enough to ﬁnd their hex values, which are shown in the diagram above each byte. Trailing

zero bytes at the end of narrow characters are not included in the ﬁle.

Table 9: Example of a Font File

0xFF 0xFF 0X05 0x07 0x68 0x6A 0x00 0x0F

0x05 0x00 0x14 0x03 0x00 0x17 0x04 0x7F

0x04 0x81 0x80 0x07 0xC4 0x3E 0x10 0x02

0x20 0xB1 0x07

The colours refer to: Font information header, character ’h’, character ’i’, character ’j’.

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