readme

README.md

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+picedit
+=======
+
+A simple CLI and API for image manipulation
+
+CLI Usage
+---------
+
+```
+Usage: picedit <input> [OPTIONS]
+Options:
+  --contrast <n> - a number between -255 and 255
+  --brightness <n> - a number between -255 and 255
+  --gamma <n>
+  --fade <n> - a number between 0 and 100
+  --rotate <n> - rotate image by n degrees
+  --grayscale - turn the image grayscale
+  --invert - invert (negative) the image
+  --output <filename> - output name, defaults to 'output.png'
+```
+
+Library
+-------
+Documentation available at hackage
+
+```haskell
+import Picture
+
+main = do
+  pic <- readPicture "myfile.png"
+
+  writePicturePng "output.png" (grayscale pic)
+```