2021-01-25 23:16:46 +00:00
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"""RGB colour palettes to target for Apple II image conversions."""
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2021-01-15 22:18:25 +00:00
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import numpy as np
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import image
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class Palette:
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RGB = None
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SRGB = None
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2021-01-25 22:28:00 +00:00
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DISTANCES_PATH = None
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2021-01-15 22:18:25 +00:00
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# Maps palette values to screen dots. Note that these are the same as
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# the binary values in reverse order.
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DOTS = {
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0: (False, False, False, False),
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1: (True, False, False, False),
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2: (False, True, False, False),
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3: (True, True, False, False),
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4: (False, False, True, False),
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5: (True, False, True, False),
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6: (False, True, True, False),
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7: (True, True, True, False),
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8: (False, False, False, True),
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9: (True, False, False, True),
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10: (False, True, False, True),
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11: (True, True, False, True),
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12: (False, False, True, True),
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13: (True, False, True, True),
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14: (False, True, True, True),
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15: (True, True, True, True)
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}
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DOTS_TO_4BIT = {}
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for k, v in DOTS.items():
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DOTS_TO_4BIT[v] = k
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2021-01-25 22:28:00 +00:00
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def __init__(self, load_distances=True):
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if load_distances:
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# CIE2000 colour distance matrix from 24-bit RGB tuple to 4-bit
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# palette colour.
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self.distances = np.memmap(self.DISTANCES_PATH, mode="r+",
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dtype=np.uint8, shape=(16777216, 16))
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self.RGB = {}
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for k, v in self.SRGB.items():
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self.RGB[k] = (np.clip(image.srgb_to_linear_array(v / 255), 0.0,
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1.0) * 255).astype(np.uint8)
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class ToHgrPalette(Palette):
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DISTANCES_PATH = "data/distances_tohgr.data"
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# Default tohgr/bmp2dhr palette
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SRGB = {
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0: np.array((0, 0, 0)), # Black
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8: np.array((148, 12, 125)), # Magenta
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4: np.array((99, 77, 0)), # Brown
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12: np.array((249, 86, 29)), # Orange
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2: np.array((51, 111, 0)), # Dark green
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10: np.array((126, 126, 126)), # Grey2
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6: np.array((67, 200, 0)), # Green
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14: np.array((221, 206, 23)), # Yellow
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1: np.array((32, 54, 212)), # Dark blue
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9: np.array((188, 55, 255)), # Violet
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5: np.array((126, 126, 126)), # Grey1
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13: np.array((255, 129, 236)), # Pink
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3: np.array((7, 168, 225)), # Med blue
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11: np.array((158, 172, 255)), # Light blue
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7: np.array((93, 248, 133)), # Aqua
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15: np.array((255, 255, 255)), # White
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}
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class OpenEmulatorPalette(Palette):
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DISTANCES_PATH = "data/distances_openemulator.data"
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2021-01-15 22:18:25 +00:00
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# OpenEmulator
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2021-01-25 22:28:00 +00:00
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SRGB = {
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2021-01-15 22:18:25 +00:00
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0: np.array((0, 0, 0)), # Black
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8: np.array((203, 0, 121)), # Magenta
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4: np.array((99, 103, 0)), # Brown
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12: np.array((244, 78, 0)), # Orange
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2: np.array((0, 150, 0)), # Dark green
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10: np.array((130, 130, 130)), # Grey2
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6: np.array((0, 235, 0)), # Green
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14: np.array((214, 218, 0)), # Yellow
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1: np.array((20, 0, 246)), # Dark blue
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9: np.array((230, 0, 244)), # Violet
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5: np.array((130, 130, 130)), # Grey1
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13: np.array((244, 105, 235)), # Pink
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3: np.array((0, 174, 243)), # Med blue
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11: np.array((160, 156, 244)), # Light blue
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7: np.array((25, 243, 136)), # Aqua
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15: np.array((244, 247, 244)), # White
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}
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2021-01-25 22:28:00 +00:00
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class VirtualIIPalette(Palette):
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DISTANCES_PATH = "data/distances_virtualii.data"
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SRGB = {
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0: np.array((0, 0, 0)), # Black
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8: np.array((231, 36, 66)), # Magenta
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4: np.array((154, 104, 0)), # Brown
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12: np.array((255, 124, 0)), # Orange
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2: np.array((0, 135, 45)), # Dark green
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10: np.array((104, 104, 104)), # Grey2
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6: np.array((0, 222, 0)), # Green
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14: np.array((255, 252, 0)), # Yellow
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1: np.array((1, 30, 169)), # Dark blue
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9: np.array((230, 73, 228)), # Violet
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5: np.array((185, 185, 185)), # Grey1
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13: np.array((255, 171, 153)), # Pink
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3: np.array((47, 69, 255)), # Med blue
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11: np.array((120, 187, 255)), # Light blue
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7: np.array((83, 250, 208)), # Aqua
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15: np.array((255, 255, 255)), # White
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}
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PALETTES = {
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'openemulator': OpenEmulatorPalette,
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'virtualii': VirtualIIPalette,
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'tohgr': ToHgrPalette,
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}
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DEFAULT_PALETTE = 'openemulator'
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