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fxconv: code review and color image conversion
This change enhances the style of fxconv by using more classes and generally more Pythonic constructions. It also introduces image conversion for fx-CG 50, requiring the use of --fx or --cg to specify the target machine with -i. The default is set to --fx to maintain compatibility with older Makefiles.
This commit is contained in:
Lephe
parent
bf2eff80d2
commit
e1ddf0f452
3 changed files with 323 additions and 113 deletions
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@ -8,7 +8,7 @@ import fxconv
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help_string = """
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usage: fxconv [-s] <python script> [files...]
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fxconv -b <bin file> -o <object file> [parameters...]
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fxconv -i <png file> -o <object file> [parameters...]
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fxconv -i <png file> -o <object file> (--fx|--cg) [parameters...]
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fxconv -f <png file> -o <object file> [parameters...]
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fxconv converts data files such as images and fonts into gint formats
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@ -27,11 +27,14 @@ a Makefile, used to convert only a subset of the files in the script.
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The -b, -i and -f modes are shortcuts to convert single files without a script.
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They accept parameters with a "category.key:value" syntax, for example:
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fxconv -f myfont.png -o myfont.o charset:ascii grid.padding:1 height:7
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When converting images, use --fx (black-and-white calculators) or --cg (16-bit
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color calculators) to specify the target machine.
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""".strip()
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# Simple error-warnings system
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def err(msg):
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print("error:", msg, file=sys.stderr)
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print("\x1b[31;1merror:\x1b[0m", msg, file=sys.stderr)
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def warn(msg):
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print("warning:", msg, file=sys.stderr)
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@ -40,6 +43,7 @@ def main():
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modes = "script binary image font"
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mode = "s"
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output = None
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target = None
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# Parse command-line arguments
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@ -49,7 +53,7 @@ def main():
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try:
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opts, args = getopt.gnu_getopt(sys.argv[1:], "hsbifo:",
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("help output="+modes).split())
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("help output= fx cg "+modes).split())
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except getopt.GetoptError as error:
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err(error)
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sys.exit(1)
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@ -64,6 +68,8 @@ def main():
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pass
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elif name in [ "-o", "--output" ]:
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output = value
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elif name in [ "--fx", "--cg" ]:
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target = name[2:]
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# Other names are modes
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else:
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mode = name[1] if len(name)==2 else name[2]
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@ -107,6 +113,11 @@ def main():
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params["type"] = { "b": "binary", "i": "image", "f": "font" }[mode]
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fxconv.convert(input, params, output)
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try:
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fxconv.convert(input, params, output, target)
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except fxconv.FxconvError as e:
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err(e)
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sys.exit(1)
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main()
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if __name__ == "__main__":
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main()
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399
fxconv/fxconv.py
399
fxconv/fxconv.py
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@ -1,5 +1,5 @@
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"""
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fxconv: Convert data files into gint formats or object files
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Convert data files into gint formats or object files
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"""
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import os
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@ -8,8 +8,15 @@ import subprocess
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from PIL import Image
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__all__ = [
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# Color names
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"FX_BLACK", "FX_DARK", "FX_LIGHT", "FX_WHITE", "FX_ALPHA",
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# Functions
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"quantize", "convert", "elf",
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]
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#
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# Color quantification
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# Constants
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#
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# Colors
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@ -19,89 +26,173 @@ FX_LIGHT = (170, 170, 170, 255)
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FX_WHITE = (255, 255, 255, 255)
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FX_ALPHA = ( 0, 0, 0, 0)
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# Profiles
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# fx-9860G profiles
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class FxProfile:
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def __init__(self, id, name, colors, layers):
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"""
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Construct an FxProfile object.
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* [id] is the profile ID in bopti
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* [name] is the profile's name as seen in the "profile" key
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* [colors] is the set of supported colors
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* [layers] is a list of layer functions
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"""
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self.id = id
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self.name = name
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self.gray = FX_LIGHT in colors or FX_DARK in colors
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self.colors = colors
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self.layers = layers
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@staticmethod
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def find(name):
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"""Find a profile by name."""
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for profile in FX_PROFILES:
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if profile.name == name:
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return profile
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return None
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FX_PROFILES = [
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{ # Usual black-and-white bitmaps without transparency, as in MonochromeLib
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"name": "mono",
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"gray": False,
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"colors": { FX_BLACK, FX_WHITE },
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"layers": [ lambda c: (c == FX_BLACK) ]
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},
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{ # Black-and-white with transparency, equivalent of two bitmaps in ML
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"name": "mono_alpha",
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"gray": False,
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"colors": { FX_BLACK, FX_WHITE, FX_ALPHA },
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"layers": [ lambda c: (c != FX_ALPHA),
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lambda c: (c == FX_BLACK) ]
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},
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{ # Gray engine bitmaps, reference could have been Eiyeron's Gray Lib
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"name": "gray",
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"gray": True,
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"colors": { FX_BLACK, FX_DARK, FX_LIGHT, FX_WHITE },
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"layers": [ lambda c: (c in [FX_BLACK, FX_LIGHT]),
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lambda c: (c in [FX_BLACK, FX_DARK]) ]
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},
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{ # Gray images with transparency, unfortunately 3 layers since 5 colors
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"name": "gray_alpha",
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"gray": True,
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"colors": { FX_BLACK, FX_DARK, FX_LIGHT, FX_WHITE, FX_ALPHA },
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"layers": [ lambda c: (c != FX_ALPHA),
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lambda c: (c in [FX_BLACK, FX_LIGHT]),
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lambda c: (c in [FX_BLACK, FX_DARK]) ]
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},
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# Usual black-and-white bitmaps without transparency, as in MonochromeLib
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FxProfile(0x0, "mono", { FX_BLACK, FX_WHITE }, [
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lambda c: (c == FX_BLACK),
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]),
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# Black-and-white with transparency, equivalent of two bitmaps in ML
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FxProfile(0x1, "mono_alpha", { FX_BLACK, FX_WHITE, FX_ALPHA }, [
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lambda c: (c != FX_ALPHA),
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lambda c: (c == FX_BLACK),
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]),
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# Gray engine bitmaps, reference could have been Eiyeron's Gray Lib
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FxProfile(0x2, "gray", { FX_BLACK, FX_DARK, FX_LIGHT, FX_WHITE }, [
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lambda c: (c in [FX_BLACK, FX_LIGHT]),
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lambda c: (c in [FX_BLACK, FX_DARK]),
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]),
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# Gray images with transparency, unfortunately 3 layers since 5 colors
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FxProfile(0x3, "gray_alpha",
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{ FX_BLACK, FX_DARK, FX_LIGHT, FX_WHITE, FX_ALPHA }, [
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lambda c: (c != FX_ALPHA),
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lambda c: (c in [FX_BLACK, FX_LIGHT]),
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lambda c: (c in [FX_BLACK, FX_DARK]),
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]),
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]
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# fx-CG 50 profiles
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class CgProfile:
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def __init__(self, id, name, alpha):
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"""
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Construct a CgProfile object.
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* [id] is the profile ID in bopti
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* [name] is the profile name as found in the specification key
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* [alpha] is True if this profile supports alpha, False otherwise
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"""
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self.id = id
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self.name = name
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self.supports_alpha = alpha
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@staticmethod
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def find(name):
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"""Find a profile by name."""
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for profile in CG_PROFILES:
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if profile.name == name:
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return profile
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return None
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CG_PROFILES = [
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# 16-bit R5G6B5
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CgProfile(0x0, "r5g6b5", False),
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# 16-bit R5G6B5 with alpha
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CgProfile(0x1, "r5g6b5a", True),
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# 8-bit palette
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CgProfile(0x2, "p8", True),
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# 4-bit palette
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CgProfile(0x3, "p4", True),
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]
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#
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# Character sets
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# Character sets
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#
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class _Charset:
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class Charset:
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def __init__(self, id, name, count):
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self.id = id
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self.name = name
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self.count = count
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@staticmethod
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def find(name):
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"""Find a charset by name."""
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for charset in FX_CHARSETS:
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if charset.name == name:
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return charset
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return None
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FX_CHARSETS = [
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# Digits 0...9
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_Charset(0x0, "numeric", 10),
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Charset(0x0, "numeric", 10),
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# Uppercase letters A...Z
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_Charset(0x1, "upper", 26),
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Charset(0x1, "upper", 26),
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# Upper and lowercase letters A..Z, a..z
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_Charset(0x2, "alpha", 52),
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Charset(0x2, "alpha", 52),
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# Letters and digits A..Z, a..z, 0..9
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_Charset(0x3, "alnum", 62),
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Charset(0x3, "alnum", 62),
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# All printable characters from 0x20 to 0x7e
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_Charset(0x4, "print", 95),
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Charset(0x4, "print", 95),
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# All 128 ASII characters
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_Charset(0x5, "ascii", 128),
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Charset(0x5, "ascii", 128),
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]
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#
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# Internal routines
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# Area specifications
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#
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# normalize_area(): Expand area.size and set defaults for all values.
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def _normalize_area(area, img):
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default = { "x": 0, "y": 0, "width": img.width, "height": img.height }
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if area is None:
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area = default
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else:
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class Area:
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def __init__(self, area, img):
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"""
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Construct an Area object from a dict specification. The following keys
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may be used:
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* "x", "y" (int strings, default to 0)
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* "width", "height" (int strings, default to image dimensions)
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* "size" ("WxH" where W and H are the width and height)
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The Area objects has attributes "x", "y", "w" and "h".
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"""
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self.x = int(area.get("x", 0))
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self.y = int(area.get("y", 0))
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self.w = int(area.get("width", img.width))
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self.h = int(area.get("height", img.height))
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if "size" in area:
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area["width"], area["height"] = area["size"].split("x")
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area = { **default, **area }
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self.w, self.h = map(int, area["size"].split("x"))
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return (int(area[key]) for key in "x y width height".split())
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def tuple(self):
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"""Return the tuple representation (x,y,w,h)."""
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return (self.x, self.y, self.w, self.h)
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class _Grid:
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# [grid] is a dictionary of parameters. Relevant keys:
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# "border", "padding", "width", "height", "size"
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#
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# Grid specifications
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#
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class Grid:
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def __init__(self, grid):
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self.border = int(grid.get("border", 0))
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"""
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Construct a Grid object from a dict specification. The following keys
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may be used:
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* "border" (int string, defaults to 0)
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* "padding" (int string, defaults to 0)
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* "width", "height" (int strings, mandatory if "size" not set)
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* "size" ("WxH" where W and H are the cell width/height)
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The Grid object has attributes "border", "padding", "w" and "h".
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"""
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self.border = int(grid.get("border", 0))
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self.padding = int(grid.get("padding", 0))
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self.w = int(grid.get("width", "-1"))
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self.h = int(grid.get("height", "-1"))
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self.w = int(grid.get("width", -1))
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self.h = int(grid.get("height", -1))
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if "size" in grid:
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self.w, self.h = map(int, grid["size"].split("x"))
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@ -109,8 +200,8 @@ class _Grid:
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if self.w <= 0 or self.h <= 0:
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raise FxconvError("size of grid unspecified or invalid")
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# size(): Number of elements in the grid
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def size(self, img):
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"""Count the number of elements in the grid."""
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b, p, w, h = self.border, self.padding, self.w, self.h
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# Padding-extended parameters
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@ -122,8 +213,8 @@ class _Grid:
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return columns * rows
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# iter(): Iterator on all rectangles of the grid
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def iter(self, img):
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"""Build an iterator on all subrectangles of the grid."""
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b, p, w, h = self.border, self.padding, self.w, self.h
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# Padding-extended parameters
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@ -143,25 +234,22 @@ class _Grid:
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# Binary conversion
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#
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def _convert_binary(input, output, params):
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raise FxconvError("TODO: binary mode x_x")
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def convert_binary(input, output, params):
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data = open(input, "rb").read()
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elf(data, output, "_" + params["name"])
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#
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# Image conversion
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# Image conversion for fx-9860G
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#
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def _profile_find(name):
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gen = ((i,pr) for (i,pr) in enumerate(FX_PROFILES) if pr["name"] == name)
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return next(gen, (None,None))
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def _convert_image(input, output, params):
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def convert_bopti_fx(input, output, params):
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img = Image.open(input)
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if img.width >= 4096 or img.height >= 4096:
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raise FxconvError(f"'{input}' is too large (max. 4095*4095)")
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raise FxconvError(f"'{input}' is too large (max. 4095x4095)")
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# Expand area.size and get the defaults. Crop image to resulting area.
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params["area"] = _normalize_area(params.get("area", None), img)
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img = img.crop(params["area"])
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area = Area(params.get("area", {}), img)
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img = img.crop(area.tuple())
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# Quantize the image and check the profile
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img = quantize(img, dither=False)
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@ -172,26 +260,27 @@ def _convert_image(input, output, params):
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colors = { y for (x,y) in img.getcolors() }
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if "profile" in params:
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p = params["profile"]
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pid, p = _profile_find(p)
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name = params["profile"]
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p = FxProfile.find(name)
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if p is None:
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raise FxconvError(f"unknown profile {p} in conversion '{input}'")
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if colors - profiles[p]:
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raise FxconvError(f"'{input}' has more colors than profile '{p}'")
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raise FxconvError(f"unknown profile {name} in '{input}'")
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if colors - p.colors:
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raise FxconvError(f"{name} has too few colors for '{input}'")
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else:
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p = "gray" if FX_LIGHT in colors or FX_DARK in colors else "mono"
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if FX_ALPHA in colors: p += "_alpha"
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pid, p = _profile_find(p)
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name = "gray" if FX_LIGHT in colors or FX_DARK in colors else "mono"
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if FX_ALPHA in colors: name += "_alpha"
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p = FxProfile.find(name)
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# Make the image header
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header = bytes ([(0x80 if p["gray"] else 0) + pid])
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header = bytes ([(0x80 if p.gray else 0) + p.id])
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encode24bit = lambda x: bytes([ x >> 16, (x & 0xff00) >> 8, x & 0xff ])
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header += encode24bit((img.size[0] << 12) + img.size[1])
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# Split the image into layers depending on the profile and zip them all
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layers = [ _image_project(img, layer) for layer in p["layers"] ]
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layers = [ _image_project(img, layer) for layer in p.layers ]
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count = len(layers)
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size = len(layers[0])
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@ -224,25 +313,57 @@ def _image_project(img, f):
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return data
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#
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# Image conversion for fx-CG 50
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#
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def convert_bopti_cg(input, output, params):
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img = Image.open(input)
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if img.width >= 65536 or img.height >= 65536:
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raise FxconvError(f"'{input}' is too large (max. 65535x65535)")
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# Crop image to key "area"
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area = Area(params.get("area", {}), img)
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img = img.crop(area.tuple())
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# Encode the image into the 16-bit format
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encoded, alpha = r5g6b5(img)
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# If no profile is specified, fall back to R5G6B5 or R5G6B5A as needed
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name = params.get("profile", "r5g6b5" if alpha is None else "r5g6b5a")
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profile = CgProfile.find(name)
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if name in [ "r5g6b5", "r5g6b5a" ]:
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if alpha is not None and not profile.supports_alpha:
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raise FxconvError(f"'{input}' has transparency; use r5g6b5a")
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w, h, a = img.width, img.height, (0x00 if alpha is None else alpha)
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header = bytearray([
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0x00, profile.id, # Profile identification
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a >> 8, a & 0xff, # Alpha color
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w >> 8, w & 0xff, # Width
|
||||
h >> 8, h & 0xff, # Height
|
||||
])
|
||||
|
||||
elf(header + encoded, output, "_" + params["name"])
|
||||
|
||||
#
|
||||
# Font conversion
|
||||
#
|
||||
|
||||
def _charset_find(name):
|
||||
gen = (cs for cs in FX_CHARSETS if cs.name == name)
|
||||
return next(gen, None)
|
||||
|
||||
def _trim(img):
|
||||
def _blank(x):
|
||||
def blank(x):
|
||||
return all(px[x,y] == FX_WHITE for y in range(img.height))
|
||||
|
||||
left = 0
|
||||
right = img.width
|
||||
px = img.load()
|
||||
|
||||
while left + 1 < right and _blank(left):
|
||||
while left + 1 < right and blank(left):
|
||||
left += 1
|
||||
while right - 1 > left and _blank(right - 1):
|
||||
while right - 1 > left and blank(right - 1):
|
||||
right -= 1
|
||||
|
||||
return img.crop((left, 0, right, img.height))
|
||||
|
|
@ -255,19 +376,21 @@ def _pad(seq, length):
|
|||
n = max(0, length - len(seq))
|
||||
return seq + bytearray(n)
|
||||
|
||||
def _convert_font(input, output, params):
|
||||
def convert_topti(input, output, params):
|
||||
|
||||
#--
|
||||
# Image area and grid
|
||||
#--
|
||||
|
||||
img = Image.open(input)
|
||||
params["area"] = _normalize_area(params.get("area", None), img)
|
||||
img = img.crop(params["area"])
|
||||
area = Area(params.get("area", {}), img)
|
||||
img = img.crop(area.tuple())
|
||||
|
||||
grid = _Grid(params.get("grid", {}))
|
||||
grid = Grid(params.get("grid", {}))
|
||||
|
||||
# Quantize image (any profile will do)
|
||||
# Quantize image. (Profile doesn't matter here; only black pixels will be
|
||||
# encoded into glyphs. White pixels are used to separate entries and gray
|
||||
# pixels can be used to forcefully insert spacing on the sides.)
|
||||
img = quantize(img, dither=False)
|
||||
|
||||
#--
|
||||
|
|
@ -277,7 +400,7 @@ def _convert_font(input, output, params):
|
|||
if "charset" not in params:
|
||||
raise FxconvError("'charset' attribute is required and missing")
|
||||
|
||||
charset = _charset_find(params["charset"])
|
||||
charset = Charset.find(params["charset"])
|
||||
if charset is None:
|
||||
raise FxconvError(f"unknown character set '{charset}'")
|
||||
if charset.count > grid.size(img):
|
||||
|
|
@ -371,7 +494,8 @@ def _convert_font(input, output, params):
|
|||
# Exceptions
|
||||
#
|
||||
|
||||
FxconvError = Exception
|
||||
class FxconvError(Exception):
|
||||
pass
|
||||
|
||||
#
|
||||
# API
|
||||
|
|
@ -379,7 +503,7 @@ FxconvError = Exception
|
|||
|
||||
def quantize(img, dither=False):
|
||||
"""
|
||||
Convert a PIL.Image.Image into an RGBA image whose only colors are:
|
||||
Convert a PIL.Image.Image into an RGBA image with only these colors:
|
||||
* FX_BLACK = ( 0, 0, 0, 255)
|
||||
* FX_DARK = ( 85, 85, 85, 255)
|
||||
* FX_LIGHT = (170, 170, 170, 255)
|
||||
|
|
@ -438,7 +562,81 @@ def quantize(img, dither=False):
|
|||
|
||||
return img
|
||||
|
||||
def convert(input, params, output=None):
|
||||
def r5g6b5(img):
|
||||
"""
|
||||
Convert a PIL.Image.Image into an R5G6B5 byte stream. If there are
|
||||
transparent pixels, chooses a color to implement alpha and replaces them
|
||||
with this color.
|
||||
|
||||
Returns the converted image as a bytearray and the alpha value, or None if
|
||||
no alpha value was used.
|
||||
"""
|
||||
|
||||
def rgb24to16(r, g, b):
|
||||
r = (r & 0xff) >> 3
|
||||
g = (g & 0xff) >> 2
|
||||
b = (b & 0xff) >> 3
|
||||
return (r << 11) | (g << 5) | b
|
||||
|
||||
# Save the alpha channel and make it 1-bit
|
||||
try:
|
||||
alpha_channel = img.getchannel("A").convert("1", dither=Image.NONE)
|
||||
except:
|
||||
alpha_channel = Image.new("L", img.size, 255)
|
||||
|
||||
# Convert the input image to RGB and put back the alpha channel
|
||||
img = img.convert("RGB")
|
||||
img.putalpha(alpha_channel)
|
||||
|
||||
# Gather a list of R5G6B5 colors
|
||||
|
||||
colors = set()
|
||||
has_alpha = False
|
||||
|
||||
pixels = img.load()
|
||||
for y in range(img.height):
|
||||
for x in range(img.width):
|
||||
r, g, b, a = pixels[x, y]
|
||||
|
||||
if a == 0:
|
||||
has_alpha = True
|
||||
else:
|
||||
colors.add(rgb24to16(r, g, b))
|
||||
|
||||
# Choose a color for the alpha if needed
|
||||
|
||||
if has_alpha:
|
||||
palette = set(range(65536))
|
||||
available = palette - colors
|
||||
|
||||
if not available:
|
||||
raise FxconvError("image uses all 65536 colors and alpha")
|
||||
alpha = available.pop()
|
||||
else:
|
||||
alpha = None
|
||||
|
||||
# Create a byte array with all encoded pixels
|
||||
|
||||
encoded = bytearray(img.width * img.height * 2)
|
||||
offset = 0
|
||||
|
||||
for y in range(img.height):
|
||||
for x in range(img.width):
|
||||
r, g, b, a = pixels[x, y]
|
||||
|
||||
if a == 0:
|
||||
encoded[offset] = alpha >> 8
|
||||
encoded[offset+1] = alpha & 0xff
|
||||
else:
|
||||
rgb16 = rgb24to16(r, g, b)
|
||||
encoded[offset] = rgb16 >> 8
|
||||
encoded[offset+1] = rgb16 & 0xff
|
||||
|
||||
offset += 2
|
||||
|
||||
return encoded, alpha
|
||||
|
||||
def convert(input, params, output=None, target=None):
|
||||
"""
|
||||
Convert a data file into an object that exports the following symbols:
|
||||
* _<varname>
|
||||
|
|
@ -450,12 +648,13 @@ def convert(input, params, output=None):
|
|||
input -- Input file path
|
||||
params -- Parameter dictionary
|
||||
output -- Output file name [default: <input> with suffix '.o']
|
||||
target -- 'fx' or 'cg' (some conversions require this) [default: None]
|
||||
|
||||
Produces an output file and returns nothing.
|
||||
"""
|
||||
|
||||
if output is None:
|
||||
output = os.path.splitext(input)[0] + '.o'
|
||||
output = os.path.splitext(input)[0] + ".o"
|
||||
|
||||
if "name" not in params:
|
||||
raise FxconvError(f"no name specified for conversion '{input}'")
|
||||
|
|
@ -463,11 +662,13 @@ def convert(input, params, output=None):
|
|||
if "type" not in params:
|
||||
raise FxconvError(f"missing type in conversion '{input}'")
|
||||
elif params["type"] == "binary":
|
||||
_convert_binary(input, output, params)
|
||||
elif params["type"] == "image":
|
||||
_convert_image(input, output, params)
|
||||
convert_binary(input, output, params)
|
||||
elif params["type"] == "image" and target in [ "fx", None ]:
|
||||
convert_bopti_fx(input, output, params)
|
||||
elif params["type"] == "image" and target == "cg":
|
||||
convert_bopti_cg(input, output, params)
|
||||
elif params["type"] == "font":
|
||||
_convert_font(input, output, params)
|
||||
convert_topti(input, output, params)
|
||||
|
||||
def elf(data, output, symbol, section=None, arch="sh3"):
|
||||
"""
|
||||
|
|
|
|||
|
|
@ -38,9 +38,9 @@ target-fx := $(filename).g1a
|
|||
target-cg := $(filename).g3a
|
||||
|
||||
# Source files
|
||||
src := $(shell find src -name '*.c')
|
||||
assets-fx := $(shell find assets-fx/*/)
|
||||
assets-cg := $(shell find assets-cg/*/)
|
||||
src := $(wildcard src/*.c src/*/*.c src/*/*/*.c src/*/*/*/*.c)
|
||||
assets-fx := $(wildcard assets-fx/*/*)
|
||||
assets-cg := $(wildcard assets-cg/*/*)
|
||||
|
||||
# Object files
|
||||
obj-fx := $(src:%.c=build-fx/%.o) $(assets-fx:assets-fx/%=build-fx/assets/%.o)
|
||||
|
|
@ -91,13 +91,11 @@ build-cg/%.o: %.c
|
|||
# Images
|
||||
build-fx/assets/img/%.o: assets-fx/img/%
|
||||
@ mkdir -p $(dir $@)
|
||||
fxconv -i $< -o $@ name:img_$(basename $*)
|
||||
fxconv -i $< -o $@ --fx name:img_$(basename $*)
|
||||
|
||||
build-cg/assets/img/%.o: assets-cg/img/%
|
||||
@ echo -ne "\e[31;1mWARNING: image conversion for fxcg50 is not "
|
||||
@ echo -ne "supported yet\e[0m"
|
||||
@ mkdir -p $(dir $@)
|
||||
fxconv -i $< -o $@ name:img_$(basename $*)
|
||||
fxconv -i $< -o $@ --cg name:img_$(basename $*)
|
||||
|
||||
# Fonts
|
||||
build-fx/assets/fonts/%.o: assets-fx/fonts/%
|
||||
|
|
@ -126,8 +124,8 @@ distclean: clean
|
|||
install-fx: $(target-fx)
|
||||
p7 send -f $<
|
||||
install-cg: $(target-cg)
|
||||
@ while [[ ! -h /dev/Prizm1 ]]; do sleep 1; done
|
||||
@ mount /dev/Prizm1
|
||||
@ while [[ ! -h /dev/Prizm1 ]]; do sleep 0.25; done
|
||||
@ while ! mount /dev/Prizm1; do sleep 0.25; done
|
||||
@ rm -f /mnt/prizm/$<
|
||||
@ cp $< /mnt/prizm
|
||||
@ umount /dev/Prizm1
|
||||
|
|
|
|||
Loading…
Add table
Reference in a new issue