54 lines
1.6 KiB
Python
54 lines
1.6 KiB
Python
from typing import Dict, List, Tuple
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from fontTools.ttLib.tables.C_O_L_R_ import LayerRecord, table_C_O_L_R_
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from fontTools.ttLib.tables.C_P_A_L_ import Color, table_C_P_A_L_
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from .errors import ColorLibError
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def buildCOLR(colorLayers: Dict[str, List[Tuple[str, int]]]) -> table_C_O_L_R_:
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"""Build COLR table from color layers mapping.
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Args:
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colorLayers: : map of base glyph names to lists of (layer glyph names,
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palette indices) tuples.
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Return:
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A new COLRv0 table.
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"""
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colorLayerLists = {}
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for baseGlyphName, layers in colorLayers.items():
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colorLayerLists[baseGlyphName] = [
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LayerRecord(layerGlyphName, colorID) for layerGlyphName, colorID in layers
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]
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colr = table_C_O_L_R_()
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colr.version = 0
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colr.ColorLayers = colorLayerLists
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return colr
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def buildCPAL(
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palettes: List[List[Tuple[float, float, float, float]]]
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) -> table_C_P_A_L_:
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"""Build CPAL table from list of color palettes.
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Args:
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palettes: : list of lists of colors encoded as tuples of (R, G, B, A) floats.
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Return:
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A new CPALv0 table.
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"""
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if len({len(p) for p in palettes}) != 1:
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raise ColorLibError("color palettes have different lengths")
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cpal = table_C_P_A_L_()
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# TODO(anthotype): Support version 1 with palette types, labels and entry labels.
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cpal.version = 0
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cpal.numPaletteEntries = len(palettes[0])
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cpal.palettes = [
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[
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Color(*(round(v * 255) for v in (blue, green, red, alpha)))
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for red, green, blue, alpha in palette
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]
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for palette in palettes
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]
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return cpal
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