hara.image.base.util — zcaudate/hara.image 2.8.7

<< clj

(<< val elems)

returns the low-level representation of data

(-> (<< [[10 20 30] [10 20 30]] [5 5 5]) vec) => [10910 10910]

<<fn clj

(<<fn elems)

returns the function that will output a value given a vector of inputs

((<<fn [5 5 5]) [10 20 30]) => 10910

<<form clj

(<<form elems)

returns the form for evaluating a set of elements

(<<form [5 5 5]) => '(clojure.core/fn [[i2 i1 i0]] (clojure.core/bit-or (clojure.core/bit-shift-left (clojure.core/bit-and i2 31) 10) (clojure.core/bit-shift-left (clojure.core/bit-and i1 31) 5) (clojure.core/bit-shift-left (clojure.core/bit-and i0 31) 0)))

>> clj

(>> val elems)

returns human readable version of the raw bytes

(-> (short-array [10910 10910]) (>> [5 5 5])) => [[10 20 30] [10 20 30]]

>>fn clj

(>>fn elems)

returns a vector representation given an input value

((>>fn [5 5 5]) 10910) => [10 20 30]

>>form clj

(>>form elems)

returns the form for turning an integer into representations

(>>form [5 5 5]) => '(clojure.core/fn [v] [(clojure.core/bit-and (clojure.core/bit-shift-right v 10) 31) (clojure.core/bit-and (clojure.core/bit-shift-right v 5) 31) (clojure.core/bit-and (clojure.core/bit-shift-right v 0) 31)])

array-fn clj

(array-fn elems)

returns the appropriate array function for the given inputs

(array-fn [5 5 5]) => short-array

(array-fn [8 8 8 8]) => int-array

byte-argb->byte-gray clj

(byte-argb->byte-gray bytes)

(byte-argb->byte-gray bytes length)

(byte-argb->byte-gray from-bytes to-bytes length)

converts a byte-argb array to byte-gray

(-> (byte-array [255 10 10 10 255 20 20 20]) (byte-argb->byte-gray) (vec)) => [10 20]

byte-gray->int-argb clj

(byte-gray->int-argb bytes)

(byte-gray->int-argb bytes length)

(byte-gray->int-argb from-bytes to-ints length)

converts a byte-gray array to int-argb

(->> (byte-array [10 20]) (byte-gray->int-argb) (mapv int->bytes)) => [[255 10 10 10] [255 20 20 20]]

bytes->int clj

(bytes->int [b3 b2 b1 b0])

returns the integer value for bytes

(bytes->int [255 10 34 56]) => 4278854200

form-params clj

(form-params elems)

returns the mask and start values given a list of elements

(form-params [5 5 5]) => '[(31 31 31) [0 5 10]]

(form-params [8 8 8 8]) => '[(255 255 255 255) [0 8 16 24]]

int->bytes clj

(int->bytes v)

returns bytes value given an integer

(int->bytes 4278854200) => [255 10 34 56]

int-argb->byte-gray clj

(int-argb->byte-gray ints)

(int-argb->byte-gray ints length)

(int-argb->byte-gray from-ints to-bytes length)

converts a int-argb array to byte-gray

(->> [[255 10 10 10] [255 20 20 20]] (map bytes->int) (int-array) (int-argb->byte-gray) (vec)) => [10 20]

mask clj

(mask n)

returns the number representation of the binary bit mask of n digits

(mask 5) => 31 (mask 7) => 127

type-lookup clj