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image.clj
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image.clj
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;; The MIT License (MIT)
;;
;; Copyright (c) 2016 Richard Hull
;;
;; Permission is hereby granted, free of charge, to any person obtaining a copy
;; of this software and associated documentation files (the "Software"), to deal
;; in the Software without restriction, including without limitation the rights
;; to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
;; copies of the Software, and to permit persons to whom the Software is
;; furnished to do so, subject to the following conditions:
;;
;; The above copyright notice and this permission notice shall be included in all
;; copies or substantial portions of the Software.
;;
;; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
;; IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
;; FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
;; AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
;; LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
;; OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
;; SOFTWARE.
(ns clustering.data-viz.image
(:import
[java.awt Color Graphics2D RenderingHints BasicStroke GraphicsEnvironment]
[java.awt.image BufferedImage]
[java.awt.geom AffineTransform GeneralPath]
[javax.imageio ImageIO]))
(defn ^BufferedImage create-image [w h]
(BufferedImage. w h BufferedImage/TYPE_INT_ARGB))
(defn ^Graphics2D create-graphics [^BufferedImage img]
(let [g2d (.createGraphics img)]
(doto g2d
(.setRenderingHint RenderingHints/KEY_STROKE_CONTROL RenderingHints/VALUE_STROKE_NORMALIZE)
(.setRenderingHint RenderingHints/KEY_ANTIALIASING RenderingHints/VALUE_ANTIALIAS_ON)
(.setRenderingHint RenderingHints/KEY_RENDERING RenderingHints/VALUE_RENDER_QUALITY))
g2d))
(defn write-png
"Opens a file-like object, and writes the `BufferedImage` as a PNG
(Portable Network Graphics) format image"
[f ^BufferedImage image]
(ImageIO/write image "png" (clojure.java.io/file f)))