Bitmap: Difference between revisions

import unsigned

Luminance = uint8

Index = int

Pixel = tuple

r, g, b: Luminance

Image = object

w, h: Index

pixels: seq[Pixel]

Point = tuple

x, y: Index

proc px(r, g, b): Pixel =

result.r = r.uint8

result.g = g.uint8

result.b = b.uint8

proc img(w, h: int): Image =

result.w = w

result.h = h

result.pixels.newSeq(w * h)

const

Black = px( 0, 0, 0)

White = px(255, 255, 255)

iterator indices(img: Image): tuple[x, y: int] =

for x in 0 .. < img.w:

for y in 0 .. < img.h:

yield (x,y)

proc `[]`(img: Image, x, y: int): Pixel =

img.pixels[y * img.w + x]

proc `[]=`(img: var Image, x, y: int, c: Pixel) =

img.pixels[y * img.w + x] = c

proc fill(img: var Image, color: Pixel) =

for x,y in img.indices:

img[x,y] = color

proc print(img: Image) =

using stdouttype