ICFP 2007 Contest: https://web.archive.org/web/20090301164728/https://save-endo.cs.uu.nl/
drubery.com
1// TODO: Better wrapper here
2pub const SIZE: usize = 600;
3pub type Bitmap = [[(u8, u8, u8, u8); SIZE]; SIZE];
4
5pub fn new_bitmap() -> Bitmap {
6 [[(0, 0, 0, 0); SIZE]; SIZE]
7}
8
9fn output_u8(vec: &mut Vec<u8>, n: u8) {
10 vec.push(n);
11}
12
13fn output_u16(vec: &mut Vec<u8>, n: u16) {
14 vec.push(n as u8);
15 vec.push((n >> 8) as u8);
16}
17
18fn output_u32(vec: &mut Vec<u8>, n: u32) {
19 vec.push(n as u8);
20 vec.push((n >> 8) as u8);
21 vec.push((n >> 16) as u8);
22 vec.push((n >> 24) as u8);
23}
24
25pub fn to_data(bmp: &Bitmap) -> Vec<u8> {
26 let mut ret = Vec::new();
27 let row_padding = 3 - (3 * SIZE % 4);
28 output_u16(&mut ret, 0x4d42); // BM
29 output_u32(&mut ret, (0x36 + SIZE * (3 * SIZE + row_padding)) as u32); // Size
30 output_u16(&mut ret, 0x0); // Reserved
31 output_u16(&mut ret, 0x0); // Reserved
32 output_u32(&mut ret, 0x36); // Offset of pixel array
33 output_u32(&mut ret, 0x28); // Length of DIB header
34 output_u32(&mut ret, SIZE as u32); // Width
35 output_u32(&mut ret, SIZE as u32); // Height
36 output_u16(&mut ret, 0x1); // Color planes
37 output_u16(&mut ret, 0x18); // Bits per pixel
38 output_u32(&mut ret, 0x0); // No pixel array compression
39 output_u32(&mut ret, 0x0); // Horizontal resolution
40 output_u32(&mut ret, 0x0); // Vertical resolution
41 output_u32(&mut ret, 0x0); // Colors in the palette
42 output_u32(&mut ret, 0x0); // All colors are important
43
44 for y in (0..SIZE).rev() {
45 for x in 0..SIZE {
46 let (r, g, b, _) = bmp[x][y];
47 output_u8(&mut ret, b);
48 output_u8(&mut ret, g);
49 output_u8(&mut ret, r);
50 }
51
52 for _ in 0..row_padding {
53 output_u8(&mut ret, 0);
54 }
55 }
56
57 return ret;
58}