feat: more backends

4 files changed, 244 insertions, 0 deletions

diff --git a/pywal/backends/__init__.py b/pywal/backends/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/pywal/backends/__init__.py
diff --git a/pywal/backends/colorthief.py b/pywal/backends/colorthief.py
new file mode 100644
index 0000000..f1d52f7
--- /dev/null
+++ b/pywal/backends/colorthief.py
@@ -0,0 +1,79 @@
+# 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.
+
+"""
+Generate a colorscheme using ColorThief.
+"""
+
+import logging
+import sys
+
+try:
+    from colorthief import ColorThief
+
+except ImportError:
+    logging.error("ColorThief wasn't found on your system.")
+    logging.error("Try another backend. (wal --backend)")
+    sys.exit(1)
+
+from .. import util
+
+
+def gen_colors(img):
+    """Loop until 16 colors are generated."""
+    color_cmd = ColorThief(img).get_palette
+
+    for i in range(0, 10, 1):
+        raw_colors = color_cmd(color_count=8 + i)
+
+        if len(raw_colors) >= 8:
+            break
+
+        if i == 10:
+            logging.error("ColorThief couldn't generate a suitable palette.")
+            sys.exit(1)
+
+    return [util.rgb_to_hex(color) for color in raw_colors]
+
+
+def adjust(cols, light):
+    """Create palette."""
+    cols.sort(key=util.rgb_to_yiq)
+    raw_colors = [*cols, *cols]
+
+    if light:
+        raw_colors[0] = util.lighten_color(cols[0], 0.90)
+        raw_colors[7] = util.darken_color(cols[0], 0.75)
+
+    else:
+        for color in raw_colors:
+            color = util.lighten_color(color, 0.40)
+
+        raw_colors[0] = util.darken_color(cols[0], 0.80)
+        raw_colors[7] = util.lighten_color(cols[0], 0.60)
+
+    raw_colors[8] = util.lighten_color(cols[0], 0.20)
+    raw_colors[15] = raw_colors[7]
+
+    return raw_colors
+
+
+def get(img, light=False):
+    """Get colorscheme."""
+    cols = gen_colors(img)
+    return adjust(cols, light)
diff --git a/pywal/backends/colorz.py b/pywal/backends/colorz.py
new file mode 100644
index 0000000..f05e534
--- /dev/null
+++ b/pywal/backends/colorz.py
@@ -0,0 +1,60 @@
+# 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.
+
+"""
+Generate a colorscheme using Colorz.
+"""
+import logging
+import sys
+
+try:
+    import colorz
+
+except ImportError:
+    logging.error("colorz wasn't found on your system.")
+    logging.error("Try another backend. (wal --backend)")
+    sys.exit(1)
+
+from .. import colors
+from .. import util
+
+
+def gen_colors(img):
+    """Generate a colorscheme using Colorz."""
+    # pylint: disable=not-callable
+    raw_colors = colorz.colorz(img, n=6, bold_add=0)
+    return [util.rgb_to_hex([*color[0]]) for color in raw_colors]
+
+
+def adjust(cols, light):
+    """Create palette."""
+    raw_colors = [cols[0], *cols, "#FFFFFF", "#000000", *cols, "#FFFFFF"]
+
+    return colors.generic_adjust(raw_colors, light)
+
+
+def get(img, light=False):
+    """Get colorscheme."""
+    cols = gen_colors(img)
+
+    if len(cols) < 6:
+        logging.error("colorz failed to generate enough colors.")
+        logging.error("Try another backend or another image. (wal --backend)")
+        sys.exit(1)
+
+    return adjust(cols, light)
diff --git a/pywal/backends/wal.py b/pywal/backends/wal.py
new file mode 100644
index 0000000..883abb6
--- /dev/null
+++ b/pywal/backends/wal.py
@@ -0,0 +1,105 @@
+# 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.
+
+"""
+Generate a colorscheme using imagemagick.
+"""
+
+import logging
+import re
+import shutil
+import subprocess
+import sys
+
+from .. import util
+
+
+def imagemagick(color_count, img, magick_command):
+    """Call Imagemagick to generate a scheme."""
+    flags = ["-resize", "25%", "-colors", str(color_count), "-unique-colors", "txt:-"]
+    img += "[0]"
+
+    return subprocess.check_output([*magick_command, img, *flags]).splitlines()
+
+
+def has_im():
+    """Check to see if the user has im installed."""
+    if shutil.which("magick"):
+        return ["magick"]
+
+    if shutil.which("convert"):
+        return ["convert"]
+
+    logging.error("Imagemagick wasn't found on your system.")
+    logging.error("Try another backend. (wal --backend)")
+    sys.exit(1)
+
+
+def gen_colors(img):
+    """Format the output from imagemagick into a list
+    of hex colors."""
+    magick_command = has_im()
+
+    for i in range(0, 20, 1):
+        raw_colors = imagemagick(16 + i, img, magick_command)
+
+        if len(raw_colors) > 16:
+            break
+
+        if i == 19:
+            logging.error("Imagemagick couldn't generate a suitable palette.")
+            sys.exit(1)
+
+        else:
+            logging.warning("Imagemagick couldn't generate a palette.")
+            logging.warning("Trying a larger palette size %s", 16 + i)
+
+    return [re.search("#.{6}", str(col)).group(0) for col in raw_colors[1:]]
+
+
+def adjust(colors, light):
+    """Adjust the generated colors and store them in a dict that
+    we will later save in json format."""
+    raw_colors = colors[:1] + colors[8:16] + colors[8:-1]
+
+    # Manually adjust colors.
+    if light:
+        for color in raw_colors:
+            color = util.saturate_color(color, 0.5)
+
+        raw_colors[0] = util.lighten_color(colors[-1], 0.85)
+        raw_colors[7] = colors[0]
+        raw_colors[8] = util.darken_color(colors[-1], 0.4)
+        raw_colors[15] = colors[0]
+
+    else:
+        # Darken the background color slightly.
+        if raw_colors[0][1] != "0":
+            raw_colors[0] = util.darken_color(raw_colors[0], 0.40)
+
+        raw_colors[7] = util.blend_color(raw_colors[7], "#EEEEEE")
+        raw_colors[8] = util.darken_color(raw_colors[7], 0.30)
+        raw_colors[15] = util.blend_color(raw_colors[15], "#EEEEEE")
+
+    return raw_colors
+
+
+def get(img, light=False):
+    """Get colorscheme."""
+    colors = gen_colors(img)
+    return adjust(colors, light)