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organizing, doc comments, and fix scale-image arguments

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Gered 2014-03-30 11:07:10 -04:00
parent abc71f1743
commit 3ba5bb3937
1 changed files with 35 additions and 33 deletions
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68
src/toascii/models/image.clj
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@ -13,34 +13,6 @@
(def ascii-chars [\# \A \@ \% \$ \+ \= \* \: \, \. \space])
(def num-ascii-chars (count ascii-chars))
(defn get-image-by-url
(^BufferedImage [^String url]
(try
(let [java-url (query-param-url->java-url url)]
(ImageIO/read java-url))
(catch Exception ex))))
(defn get-image-by-file
(^BufferedImage [^File file]
(try
(ImageIO/read file)
(catch Exception ex))))
(defn scale-image
"takes a source image specified by the uri (a filename or a URL) and scales it proportionally
using the new width, returning the newly scaled image."
(^BufferedImage [url new-width]
(let [^Image image (ImageIO/read url)
new-height (* (/ new-width (.getWidth image))
(.getHeight image))
scaled-image (BufferedImage. new-width new-height BufferedImage/TYPE_INT_RGB)
gfx2d (doto (.createGraphics scaled-image)
(.setRenderingHint RenderingHints/KEY_INTERPOLATION
RenderingHints/VALUE_INTERPOLATION_BILINEAR)
(.drawImage image 0 0 new-width new-height nil)
(.dispose))]
scaled-image)))
(defn- get-css-color-attr [r g b]
(format "color: #%02x%02x%02x;" r g b))
@ -58,9 +30,7 @@
(bit-shift-right (bit-and 0x0000ff00 argb) 8)
(bit-and 0x000000ff argb)]))
(defn get-ascii-pixel
""
[^BufferedImage image x y color?]
(defn- get-ascii-pixel [^BufferedImage image x y color?]
(let [[a r g b] (get-pixel image x y)
peak (get-color-brightness r g b)
char-index (if (zero? peak)
@ -87,12 +57,44 @@
output])
output)))
(defn get-image-by-url
(^BufferedImage [^String url]
(try
(let [java-url (query-param-url->java-url url)]
(ImageIO/read java-url))
(catch Exception ex))))
(defn get-image-by-file
"returns a BufferedImage loaded from the file specified, or null if an error occurs."
(^BufferedImage [^File file]
(try
(ImageIO/read file)
(catch Exception ex))))
(defn scale-image
"takes a source image specified by the uri (a filename or a URL) and scales it proportionally
using the new width, returning the newly scaled image."
(^BufferedImage [^BufferedImage image new-width]
(let [new-height (* (/ new-width (.getWidth image))
(.getHeight image))
scaled-image (BufferedImage. new-width new-height BufferedImage/TYPE_INT_RGB)
gfx2d (doto (.createGraphics scaled-image)
(.setRenderingHint RenderingHints/KEY_INTERPOLATION
RenderingHints/VALUE_INTERPOLATION_BILINEAR)
(.drawImage image 0 0 new-width new-height nil)
(.dispose))]
scaled-image)))
(defn convert-image
"converts the image to an ascii representation. a multiline string will be returned,
which will be formatted for html if color? is true, or plain text if false. if
scale-to-width is specified the resulting image will be scaled proportionally from
the source image."
([^BufferedImage image color?]
(convert-image image nil color?))
([^BufferedImage image scale-width color?]
([^BufferedImage image scale-to-width color?]
(let [current-width (.getWidth image)
new-width (or scale-width current-width)
new-width (or scale-to-width current-width)
final-image (if-not (= new-width current-width)
(scale-image image new-width)
image)]