M193 is a font format that uses opcodes to describe which is which.
0x5a Point int16 x,y;
0x3f Line int16 x1,y1,x2,y2;
0x7c Oval int16 x1,y1,x2,y2;
0x7e Circle int16 cx,cy; int8 radius;
0xfc Arc int16 cx,cy,startAngle,sweepAngle; int8 radius;
0xfe Oval Arc int16 x1,y1,x2,y2,startAngle,sweepAngle;
0xfd Rect. int16 x1,y1,x2,y2;
Offset Size Description
=========================
0 5 Always "M193F".
5 4 Amount of 9 byte structures.
Followed by a contiguous array of this 9 byte structure:
Offset Size Description
=========================
0 4 UTF-32 character.
4 4 Pointer to the opcode list.
8 1 Size in bytes of the opcode list.
An "integer" is no ordinary integer.
Offset Size Description
=========================
0 1 A descriptor:
Bit Description
==================
0 1 for a math integer, otherwise 0. If 0, next 2 bits must be 0.
1 1 if this uses height, otherwise 0.
2 1 if this uses width, otherwise 0.
3-7 Unused. Always 0.
1 VAR Amount of the following structure. Or if bit D0 of descriptor is 0, this is the integer.
Offset Size Description
=========================
0 1 Math opcode and integer size.
1 VAR Integer.
If only the height bit is set, the highest integer is for height.
If only the width bit is set, the highest integer is for width.
If the height and width bits are set, the highest integer is for height and the second-highest for width.
Opcode Description
====================
0x0 Used only at the beginning.
0x1 Add.
0x2 Subtract.
0x3 Multiply.
0xe Divide.
0xf Modulo.
Size Bits in integer
0 8
1 16
2 32
These are generated by (mathOpcode << 4) | integerSize.