bitfont 0.1.0

Takes an ASCII string and generates a vector containing a bitmap font, for easy overlay into images.
Documentation 
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#![crate_type = "lib"]
#![crate_name = "bitfont"]

static CHAR_ARRAY: [u64; 95] = [
	0x0000000000000000,							// space
	0x183c3c1818001800, 0x3636000000000000, 0x36367f367f363600,		// ! " #
	0x0c3e031e301f0c00, 0x006333180c666300, 0x1c361c6e3b336e00,		// $ % &
	0x0606030000000000, 0x180c0606060c1800, 0x060c1818180c0600,		// ' ( )
	0x00663cff3c660000, 0x000c0c3f0c0c0000, 0x00000000000c0c06,		// * + ,
	0x0000003f00000000, 0x00000000000c0c00, 0x6030180c06030100,		// - . /
	0x3e63737b6f673e00, 0x0c0e0c0c0c0c3f00, 0x1e33301c06333f00,		// 0 1 2
	0x1e33301c30331e00, 0x383c36337f307800, 0x3f031f3030331e00,		// 3 4 5
	0x1c06031f33331e00, 0x3f3330180c0c0c00, 0x1e33331e33331e00,		// 6 7 8
	0x1e33333e30180e00, 0x000c0c00000c0c00, 0x000c0c00000c0c06,		// 9 : ;
	0x180c0603060c1800, 0x00003f00003f0000, 0x060c1830180c0600,		// < = >
	0x1e3330180c000c00, 0x3e637b7b7b031e00, 0x0c1e33333f333300,		// ? @ A
	0x3f66663e66663f00, 0x3c66030303663c00, 0x1f36666666361f00,		// B C D
	0x7f46161e16467f00, 0x7f46161e16060f00, 0x3c66030373667c00,		// E F G
	0x3333333f33333300, 0x1e0c0c0c0c0c1e00, 0x7830303033331e00,		// H I J
	0x6766361e36666700, 0x0f06060646667f00, 0x63777f7f6b636300,		// K L M
	0x63676f7b73636300, 0x1c36636363361c00, 0x3f66663e06060f00,		// N O P
	0x1e3333333b1e3800, 0x3f66663e36666700, 0x1e33070e38331e00,		// Q R S
	0x3f2d0c0c0c0c1e00, 0x3333333333333f00, 0x33333333331e0c00,		// T U V
	0x6363636b7f776300, 0x6363361c1c366300, 0x3333331e0c0c1e00,		// W X Y
	0x7f6331184c667f00, 0x1e06060606061e00, 0x03060c1830604000,		// Z [ \
	0x1e18181818181e00, 0x081c366300000000, 0x00000000000000ff,		// ] ^ _
	0x0c0c180000000000, 0x00001e303e336e00, 0x0706063e66663b00,		// ` a b
	0x00001e3303331e00, 0x3830303e33336e00, 0x00001e333f031e00,		// c d e
	0x1c36060f06060f00, 0x00006e33333e301f, 0x0706366e66666700,		// f g h
	0x0c000e0c0c0c1e00, 0x300030303033331e, 0x070666361e366700,		// i j k
	0x0e0c0c0c0c0c1e00, 0x0000337f7f6b6300, 0x00001f3333333300,		// l m n
	0x00001e3333331e00, 0x00003b66663e060f, 0x00006e33333e3078,		// o p q
	0x00003b6e66060f00, 0x00003e031e301f00, 0x080c3e0c0c2c1800,		// r s t
	0x0000333333336e00, 0x00003333331e0c00, 0x0000636b7f7f3600,		// u v w
	0x000063361c366300, 0x00003333333e301f, 0x00003f190c263f00,		// x y z
	0x380c0c070c0c3800, 0x1818180018181800, 0x070c0c380c0c0700,		// { | }
	0x6e3b000000000000,							// ~
    ];



pub fn bitmap_bool(mystring: &str) -> Result<Vec<Vec<bool>>, &str> {
    /*

Takes a string and turns it into a bitmap font.
Returns a vector that contains 8 vectors of bools for each row.

eg:
    let my_vec = bitmap_bool("Test string").unwrap();
    for row_vec in my_vec {
        for my_char in row_vec {
            if my_char {
                print!("█");
            } else {
                print!(" ");
            }
        }
    }

*/

    let mut return_array = Vec::new();

    for i in 0..8 {
        // Take an 8 bit slice from each array value.
        let mut row_vec = Vec::new();
        for my_char in mystring.as_bytes() {
            if (*my_char as isize - 0x20 > 95) | (*my_char as isize - 0x20 < 0) {
                return Err("Character not in font.");
            }

            let mut mycount = 0;
            let mut myval = CHAR_ARRAY[*my_char as usize - 0x20];
            myval = myval.swap_bytes();
            // do initial shr.
            myval = myval >> (i * 8);
            loop {
                if myval & 1 == 1 {
                    row_vec.push(true);
                } else {
                    row_vec.push(false);
                }
                myval = myval >> 1;
                mycount += 1;
                if mycount == 8 {
                    break;
                }
            }
        }
        return_array.push(row_vec);
    }
    return Ok(return_array);

}


pub fn bitmap_luma(mystring: &str, fgluma: u8, bgluma: u8) -> Result<Vec<Vec<u8>>, &str> {
    /*


Takes a string and foreground/background luma values and turns it into a bitmap font.
Returns a vector that contains 8 vectors of u8 for each row.

eg:
    let my_vec = bitmap_luma("Test string",1,0);
    for row_vec in my_vec {
        for my_char in row_vec {
            if my_char > 0 {
                print!("█");
            } else {
                print!(" ");
            }
        }
    }

*/

    let mut return_array = Vec::new();

    for i in 0..8 {
        // Take an 8 bit slice from each array value.
        let mut row_vec = Vec::new();
        for my_char in mystring.as_bytes() {
            if (*my_char as isize - 0x20 > 95) | (*my_char as isize - 0x20 < 0) {
                return Err("Character not in font.");
            }

            let mut mycount = 0;
            let mut myval = CHAR_ARRAY[*my_char as usize - 0x20];
            myval = myval.swap_bytes();
            // do initial shr.
            myval = myval >> (i * 8);
            loop {
                if myval & 1 == 1 {
                    row_vec.push(fgluma);
                } else {
                    row_vec.push(bgluma);
                }
                myval = myval >> 1;
                mycount += 1;
                if mycount == 8 {
                    break;
                }
            }
        }
        return_array.push(row_vec);
    }
    return Ok(return_array);
}