think.image.pixel — thinktopic/think.image 0.4.16

a-shift clj

b-shift clj

blend clj macro

(blend alpha val one-minus-alpha dest)

clamp clj

(clamp item min-val max-val)

Makes sure item is between min-val and max-val, clamping it to that range if necessary.

color-int-to-unpacked clj

(color-int-to-unpacked px shift-amount)

color-unpacked-to-int clj

(color-unpacked-to-int bt shift-amount)

denorm-color clj

(denorm-color c)

Inverse function for norm-color, transforms colors from [0, 1] to [0, 255].

double-round clj

(double-round number)

double-to-int clj

(double-to-int dval)

g-shift clj

get-masked-pixel clj

(get-masked-pixel color)

Make sure alpha is always 1. This allows writing out the image and checking the result but still ensures we are ignoring alpha which should have been multiplied through by this stage of the pipeline

image-requires-alpha-channel clj

(image-requires-alpha-channel img)

is-valid-pixel-location? clj

(is-valid-pixel-location? x y width height)

mode-pixel clj

(mode-pixel s)

norm-color clj

(norm-color c)

Transform a color intensity from [0, 255] to [0, 1].

pack-pixel clj

(pack-pixel data)

(pack-pixel r g b a)

Converts RGBA values to a single integer representing the color.

pixel-location-to-index clj

(pixel-location-to-index x y width)

r-shift clj

unpack-pixel clj

(unpack-pixel px)

Returns [R G B A]. Note that java does not have unsigned types so some of these may be negative

with-unpacked-pixel clj macro

(with-unpacked-pixel px & body)

Unpack a color integer into RGBA values and bind them to r, g, b, and a variables locally.