Function PocoNextFromUTF8

modules/commodetto/commodettoPocoBlit.c:1050–1078

*/

int PocoNextFromUTF8(uint8_t **src)
{
	int result;
	uint8_t *s = *src;
	uint8_t c = c_read8(s++);

	if (!(c & 0x80)) {
		*src = s;
		return c;
	}

	if (0xC0 == (c & 0xE0)) { // 2 byte sequence
		result = ((c & 0x1F) << 6) | (c_read8(s) & 0x3F);
		s += 1;
	}
	else if (0xE0 == (c & 0xF0)) { // 3 byte sequence
		result = ((c & 0x0F) << 12) | ((c_read8(s) & 0x3F) << 6) | (c_read8(s + 1) & 0x3F);
		s += 2;
	}
	else if (0xF0 == (c & 0xF1)) { // 4 byte sequence
		result = ((c & 0x07) << 18) | ((c_read8(s) & 0x3F) << 12) | ((c_read8(s + 1) & 0x3F) << 6) | (c_read8(s + 2) & 0x3F);
		s += 3;
	}
	else
		result = 0;

	*src = s;
	return result;
}

const uint8_t *PocoBMFGlyphFromUTF8(uint8_t **src, const uint8_t *chars, int charCount)
{