mirror of https://github.com/wanadev/yoga.git
134 lines
3.2 KiB
Python
134 lines
3.2 KiB
Python
import re
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# fmt: off
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DEFAULT_OPTIONS = {
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"output_format": "orig", # orig|auto|jpeg|png|webp|webpl
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"resize": "orig", # orig|[w,h]
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"jpeg_quality": 0.84, # 0.00-1.00
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"webp_quality": 0.90, # 0.00-1.00
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"opacity_threshold": 254, # 0-255
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"png_slow_optimization": False, # True|False
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}
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# fmt: on
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_RESIZE_OPTION_REGEXP = re.compile(
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r"^([0-9]+)[x\s:,;]([0-9]+)$", flags=re.IGNORECASE
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)
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def normalize_options(options=None):
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if not options:
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return dict(DEFAULT_OPTIONS)
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result = dict(DEFAULT_OPTIONS)
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# "PNG" -> "png" (lower case)
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# "jpg" -> "jpeg"
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if "output_format" in options:
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value = options["output_format"].lower()
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if value == "jpg":
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value = "jpeg"
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if value not in ("orig", "auto", "jpeg", "png", "webp", "webpl"):
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raise ValueError("Invalid value for 'output_format': '%s'" % value)
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result["output_format"] = value
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# "ORIG" -> "orig" (lower case)
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# 512 -> [512, 512]
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# "512" -> [512, 512]
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# "512x512" -> [512, 512]
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# "512X512" -> [512, 512]
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# "512 512" -> [512, 512]
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# "512:512" -> [512, 512]
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# "512,512" -> [512, 512]
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# "512;512" -> [512, 512]
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if "resize" in options:
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value = options["resize"]
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if type(value) == bytes:
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value = value.decode()
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if type(value) in (str, bytes):
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value = value.lower()
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if value.isdigit():
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value = int(value)
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elif _RESIZE_OPTION_REGEXP.match(value):
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match = _RESIZE_OPTION_REGEXP.match(value)
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value = [
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int(match.group(1)),
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int(match.group(2)),
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]
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elif value != "orig":
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raise ValueError("Invalid value for 'resize': %s" % value)
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if type(value) in (int, float):
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value = [value, value]
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result["resize"] = value
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# 0-100 -> 0.00-1.00
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# 110 -> 1.00
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# "100" -> 1.00
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if "jpeg_quality" in options:
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value = options["jpeg_quality"]
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if type(value) in (str, bytes):
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value = float(value)
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if value > 1:
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value = value / 100.0
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if value > 1:
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value = 1
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result["jpeg_quality"] = value
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# 0-100 -> 0.00-1.00
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# 110 -> 1.00
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# "100" -> 1.00
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if "webp_quality" in options:
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value = options["webp_quality"]
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if type(value) in (str, bytes):
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value = float(value)
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if value > 1:
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value = value / 100.0
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if value > 1:
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value = 1
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result["webp_quality"] = value
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# 0.00-1.00[ -> 0-255
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# 300 -> 255
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# "100" -> 100
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if "opacity_threshold" in options:
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value = options["opacity_threshold"]
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if type(value) in (str, bytes):
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value = float(value)
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if value < 1:
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value = value * 255
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if value > 255:
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value = 255
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result["opacity_threshold"] = round(value)
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# "" -> False
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# 0 -> False
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# 1 -> True
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if "png_slow_optimization" in options:
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result["png_slow_optimization"] = bool(
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options["png_slow_optimization"]
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)
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return result
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