backend: Add haishoku

pywal/backends/__init__.py

@@ -11,12 +11,14 @@ Created by Dylan Araps.
 
 from . import colorthief
 from . import colorz
+from . import haishoku
 from . import schemer2
 from . import wal
 
 __all__ = [
     "colorthief",
     "colorz",
+    "haishoku",
     "schemer2",
     "wal",
 ]

pywal/backends/colorz.py

@@ -17,8 +17,8 @@ def gen_colors(img):
 
 def adjust(cols, light):
     """Create palette."""
-    # Create list with placeholder values.
     bg = util.blend_color("#555555", cols[1])
+
     raw_colors = [bg, *cols, "#FFFFFF",
                   "#333333", *cols, "#FFFFFF"]
 

pywal/backends/haishoku.py

@@ -0,0 +1,36 @@
+"""
+Generate a colorscheme using Haishoku.
+"""
+import sys
+
+try:
+    from haishoku.haishoku import Haishoku
+
+except ImportError:
+    print("error: Haishoku wasn't found on your system.",
+          "Try another backend. (wal --backend)")
+    sys.exit(1)
+
+from .. import colors
+from .. import util
+
+
+def gen_colors(img):
+    """Generate a colorscheme using Colorz."""
+    palette = Haishoku.getPalette(img)
+    return [util.rgb_to_hex(col[1]) for col in palette]
+
+
+def adjust(cols, light):
+    """Create palette."""
+    cols.sort(key=util.rgb_to_yiq)
+    raw_colors = [*cols, *cols]
+    raw_colors[0] = util.lighten_color(cols[0], 0.40)
+
+    return colors.generic_adjust(raw_colors, light)
+
+
+def get(img, light=False):
+    """Get colorscheme."""
+    cols = gen_colors(img)
+    return adjust(cols, light)

pywal/backends/schemer2.py

@@ -17,7 +17,6 @@ def gen_colors(img):
 
 def adjust(cols, light):
     """Create palette."""
-    # Create list with placeholder values.
     cols.sort(key=util.rgb_to_yiq)
     raw_colors = [*cols[8:], *cols[8:]]