First commit

.gitignore

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+.stack-work/
+*~

CHANGELOG.md

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+# Changelog for `palette-rip`
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to the
+[Haskell Package Versioning Policy](https://pvp.haskell.org/).
+
+## Unreleased
+
+## 0.1.0.0 - YYYY-MM-DD

LICENSE

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+Copyright etienne (c) 2022
+
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+
+    * Neither the name of etienne nor the names of other
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

README.md

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+# palette-rip

Setup.hs

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+import Distribution.Simple
+main = defaultMain

app/Main.hs

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+module Main
+  ( main
+  ) where
+
+import           Codec.Picture
+import           Control.Monad                  ( forM_
+                                                , replicateM_
+                                                )
+import           Data.Char                      ( intToDigit )
+import           Data.Colour.SRGB               ( Colour
+                                                , sRGB
+                                                )
+import           System.Console.ANSI
+import           System.Environment
+
+main :: IO ()
+main = do
+  args <- getArgs
+  let (count, fp) = validateArgs args
+  let paletteConfig = PaletteOptions { paletteCreationMethod = MedianMeanCut
+                                     , enableImageDithering  = False
+                                     , paletteColorCount     = count
+                                     }
+  image <- ensure $ readImage fp
+  let toRGB8  = convertRGB8 image
+      palette = snd . palettize paletteConfig $ toRGB8
+  palettePP palette
+  where ensure = fmap (either error id)
+
+pixelToHex :: PixelRGB8 -> String
+pixelToHex (PixelRGB8 r g b) = '#' : hex r ++ hex g ++ hex b
+  where hex x = intToDigit . fromIntegral <$> [div x 16, mod x 16]
+
+paletteToHex :: Palette -> [String]
+paletteToHex p = map (pixelToHex . getPix) width
+ where
+  getPix x = pixelAt p x 0
+  width = take w [0 ..]
+  w     = imageWidth p
+
+pixelToColour :: PixelRGB8 -> Colour Float
+pixelToColour (PixelRGB8 r g b) = sRGB r' g' b'
+ where
+  float = (/ 255) . fromIntegral
+  r'    = float r
+  g'    = float g
+  b'    = float b
+
+paletteToColours :: Palette -> [Colour Float]
+paletteToColours p = map (pixelToColour . getPix) width
+ where
+  getPix x = pixelAt p x 0
+  width = take w [0 ..]
+  w     = imageWidth p
+
+palettePP :: Palette -> IO ()
+palettePP p = do
+  let codes   = paletteToHex p
+      colours = paletteToColours p
+  putStrLn $ unwords codes
+  replicateM_ 5 (forM_ colours putColor >> putStrLn "")
+ where
+  putColor c = do
+    setSGR [SetRGBColor Background c]
+    putStr $ replicate 8 ' '
+
+validateArgs :: [String] -> (Int, FilePath)
+validateArgs l | length l < 2 = error "Usage: color count and file name"
+               | otherwise    = (read $ head l, l !! 1)

package.yaml

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+name:                palette-rip
+version:             0.1.0.0
+github:              "githubuser/color-quantize"
+license:             BSD3
+author:              "etienne"
+maintainer:          "etienne@moqueur.chat"
+copyright:           "2022 etienne"
+
+extra-source-files:
+- README.md
+- CHANGELOG.md
+
+# Metadata used when publishing your package
+# synopsis:            Short description of your package
+# category:            Web
+
+# To avoid duplicated efforts in documentation and dealing with the
+# complications of embedding Haddock markup inside cabal files, it is
+# common to point users to the README.md file.
+description:         Please see the README on GitHub at <https://github.com/githubuser/color-quantize#readme>
+
+dependencies:
+- base >= 4.7 && < 5
+- JuicyPixels
+- colour
+- ansi-terminal
+
+ghc-options:
+- -Wall
+- -Wcompat
+- -Widentities
+- -Wincomplete-record-updates
+- -Wincomplete-uni-patterns
+- -Wmissing-export-lists
+- -Wmissing-home-modules
+- -Wpartial-fields
+- -Wredundant-constraints
+
+executables:
+  haskell-palette-rip:
+    main:                Main.hs
+    source-dirs:         app
+    ghc-options:
+    - -threaded
+    - -rtsopts
+    - -with-rtsopts=-N
+
+tests:
+  palette-rip-test:
+    main:                Spec.hs
+    source-dirs:         test
+    ghc-options:
+    - -threaded
+    - -rtsopts
+    - -with-rtsopts=-N

palette-rip.cabal

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+cabal-version: 1.12
+
+-- This file has been generated from package.yaml by hpack version 0.34.4.
+--
+-- see: https://github.com/sol/hpack
+
+name:           palette-rip
+version:        0.1.0.0
+description:    Please see the README on GitHub at <https://github.com/githubuser/color-quantize#readme>
+homepage:       https://github.com/githubuser/color-quantize#readme
+bug-reports:    https://github.com/githubuser/color-quantize/issues
+author:         etienne
+maintainer:     etienne@moqueur.chat
+copyright:      2022 etienne
+license:        BSD3
+license-file:   LICENSE
+build-type:     Simple
+extra-source-files:
+    README.md
+    CHANGELOG.md
+
+source-repository head
+  type: git
+  location: https://github.com/githubuser/color-quantize
+
+executable haskell-palette-rip
+  main-is: Main.hs
+  other-modules:
+      Paths_palette_rip
+  hs-source-dirs:
+      app
+  ghc-options: -Wall -Wcompat -Widentities -Wincomplete-record-updates -Wincomplete-uni-patterns -Wmissing-export-lists -Wmissing-home-modules -Wpartial-fields -Wredundant-constraints -threaded -rtsopts -with-rtsopts=-N
+  build-depends:
+      JuicyPixels
+    , ansi-terminal
+    , base >=4.7 && <5
+    , colour
+  default-language: Haskell2010
+
+test-suite palette-rip-test
+  type: exitcode-stdio-1.0
+  main-is: Spec.hs
+  other-modules:
+      Paths_palette_rip
+  hs-source-dirs:
+      test
+  ghc-options: -Wall -Wcompat -Widentities -Wincomplete-record-updates -Wincomplete-uni-patterns -Wmissing-export-lists -Wmissing-home-modules -Wpartial-fields -Wredundant-constraints -threaded -rtsopts -with-rtsopts=-N
+  build-depends:
+      JuicyPixels
+    , ansi-terminal
+    , base >=4.7 && <5
+    , colour
+  default-language: Haskell2010

stack.yaml

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+# This file was automatically generated by 'stack init'
+#
+# Some commonly used options have been documented as comments in this file.
+# For advanced use and comprehensive documentation of the format, please see:
+# https://docs.haskellstack.org/en/stable/yaml_configuration/
+
+# Resolver to choose a 'specific' stackage snapshot or a compiler version.
+# A snapshot resolver dictates the compiler version and the set of packages
+# to be used for project dependencies. For example:
+#
+# resolver: lts-3.5
+# resolver: nightly-2015-09-21
+# resolver: ghc-7.10.2
+#
+# The location of a snapshot can be provided as a file or url. Stack assumes
+# a snapshot provided as a file might change, whereas a url resource does not.
+#
+# resolver: ./custom-snapshot.yaml
+# resolver: https://example.com/snapshots/2018-01-01.yaml
+resolver:
+  url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/19/24.yaml
+
+# User packages to be built.
+# Various formats can be used as shown in the example below.
+#
+# packages:
+# - some-directory
+# - https://example.com/foo/bar/baz-0.0.2.tar.gz
+#   subdirs:
+#   - auto-update
+#   - wai
+packages:
+- .
+# Dependency packages to be pulled from upstream that are not in the resolver.
+# These entries can reference officially published versions as well as
+# forks / in-progress versions pinned to a git hash. For example:
+#
+# extra-deps:
+# - acme-missiles-0.3
+# - git: https://github.com/commercialhaskell/stack.git
+#   commit: e7b331f14bcffb8367cd58fbfc8b40ec7642100a
+#
+# extra-deps: []
+
+# Override default flag values for local packages and extra-deps
+# flags: {}
+
+# Extra package databases containing global packages
+# extra-package-dbs: []
+
+# Control whether we use the GHC we find on the path
+# system-ghc: true
+#
+# Require a specific version of stack, using version ranges
+# require-stack-version: -any # Default
+# require-stack-version: ">=2.7"
+#
+# Override the architecture used by stack, especially useful on Windows
+# arch: i386
+# arch: x86_64
+#
+# Extra directories used by stack for building
+# extra-include-dirs: [/path/to/dir]
+# extra-lib-dirs: [/path/to/dir]
+#
+# Allow a newer minor version of GHC than the snapshot specifies
+# compiler-check: newer-minor

stack.yaml.lock

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+# This file was autogenerated by Stack.
+# You should not edit this file by hand.
+# For more information, please see the documentation at:
+#   https://docs.haskellstack.org/en/stable/lock_files
+
+packages: []
+snapshots:
+- completed:
+    size: 619403
+    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/19/24.yaml
+    sha256: 98f5bee5bf07ff25263d7061e03c34595bfca543b611f9d3da5c95f2a6c8d723
+  original:
+    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/19/24.yaml

test/Spec.hs

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+main :: IO ()
+main = putStrLn "Test suite not yet implemented"