mirror of
https://github.com/KrisKennaway/ii-pix.git
synced 2024-11-19 08:30:48 +00:00
147 lines
5.1 KiB
Python
147 lines
5.1 KiB
Python
"""RGB colour palettes to target for Apple II image conversions."""
|
|
|
|
import colour
|
|
import numpy as np
|
|
import image
|
|
import palette_ntsc
|
|
|
|
|
|
class Palette:
|
|
RGB = {}
|
|
SRGB = None
|
|
CAM16UCS = {}
|
|
XYZ = {}
|
|
DOTS = {}
|
|
DOTS_TO_INDEX = {}
|
|
DISTANCES_PATH = None
|
|
|
|
# How many successive screen pixels are used to compute output pixel
|
|
# palette index.
|
|
PALETTE_DEPTH = None
|
|
|
|
def __init__(self, load_distances=True):
|
|
# if load_distances:
|
|
# # CIE2000 colour distance matrix from 24-bit RGB tuple to 4-bit
|
|
# # palette colour.
|
|
# self.distances = np.memmap(self.DISTANCES_PATH, mode="r+",
|
|
# dtype=np.uint8, shape=(16777216,
|
|
# len(self.SRGB)))
|
|
|
|
self.RGB = {}
|
|
for k, v in self.SRGB.items():
|
|
self.RGB[k] = (np.clip(image.srgb_to_linear_array(v / 255), 0.0,
|
|
1.0) * 255).astype(np.uint8)
|
|
self.CAM16UCS[k] = colour.convert(
|
|
v / 255, "sRGB", "CAM16UCS").astype(np.float32)
|
|
# self.XYZ[k] = colour.convert(v / 255, "sRGB",
|
|
# "CIE XYZ").astype(np.float32)
|
|
|
|
# print(self.CAM02UCS)
|
|
|
|
# Maps palette values to screen dots. Note that these are the same as
|
|
# the binary index values in reverse order.
|
|
for i in range(1 << self.PALETTE_DEPTH):
|
|
self.DOTS[i] = tuple(
|
|
bool(i & (1 << j)) for j in range(self.PALETTE_DEPTH))
|
|
|
|
# Reverse mapping from screen dots to palette index.
|
|
self.DOTS_TO_INDEX = {}
|
|
for k, v in self.DOTS.items():
|
|
self.DOTS_TO_INDEX[v] = k
|
|
|
|
|
|
# class ToHgrPalette(Palette):
|
|
# """4-bit palette used as default by other DHGR image converters."""
|
|
# DISTANCES_PATH = "data/distances_tohgr.data"
|
|
# PALETTE_DEPTH = 4
|
|
#
|
|
# # Default tohgr/bmp2dhr palette
|
|
# SRGB = {
|
|
# 0: np.array((0, 0, 0)), # Black
|
|
# 8: np.array((148, 12, 125)), # Magenta
|
|
# 4: np.array((99, 77, 0)), # Brown
|
|
# 12: np.array((249, 86, 29)), # Orange
|
|
# 2: np.array((51, 111, 0)), # Dark green
|
|
# 10: np.array((126, 126, 126)), # Grey2
|
|
# 6: np.array((67, 200, 0)), # Green
|
|
# 14: np.array((221, 206, 23)), # Yellow
|
|
# 1: np.array((32, 54, 212)), # Dark blue
|
|
# 9: np.array((188, 55, 255)), # Violet
|
|
# 5: np.array((126, 126, 126)), # Grey1
|
|
# 13: np.array((255, 129, 236)), # Pink
|
|
# 3: np.array((7, 168, 225)), # Med blue
|
|
# 11: np.array((158, 172, 255)), # Light blue
|
|
# 7: np.array((93, 248, 133)), # Aqua
|
|
# 15: np.array((255, 255, 255)), # White
|
|
# }
|
|
#
|
|
#
|
|
# class OpenEmulatorPalette(Palette):
|
|
# """4-bit palette chosen to approximately match OpenEmulator output."""
|
|
# DISTANCES_PATH = "data/distances_openemulator.data"
|
|
# PALETTE_DEPTH = 4
|
|
#
|
|
# # OpenEmulator
|
|
# SRGB = {
|
|
# 0: np.array((0, 0, 0)), # Black
|
|
# 8: np.array((203, 0, 121)), # Magenta
|
|
# 4: np.array((99, 103, 0)), # Brown
|
|
# 12: np.array((244, 78, 0)), # Orange
|
|
# 2: np.array((0, 150, 0)), # Dark green
|
|
# 10: np.array((130, 130, 130)), # Grey2
|
|
# 6: np.array((0, 235, 0)), # Green
|
|
# 14: np.array((214, 218, 0)), # Yellow
|
|
# 1: np.array((20, 0, 246)), # Dark blue
|
|
# 9: np.array((230, 0, 244)), # Violet
|
|
# 5: np.array((130, 130, 130)), # Grey1
|
|
# 13: np.array((244, 105, 235)), # Pink
|
|
# 3: np.array((0, 174, 243)), # Med blue
|
|
# 11: np.array((160, 156, 244)), # Light blue
|
|
# 7: np.array((25, 243, 136)), # Aqua
|
|
# 15: np.array((244, 247, 244)), # White
|
|
# }
|
|
#
|
|
#
|
|
# class VirtualIIPalette(Palette):
|
|
# """4-bit palette exactly matching Virtual II emulator output."""
|
|
# DISTANCES_PATH = "data/distances_virtualii.data"
|
|
# PALETTE_DEPTH = 4
|
|
#
|
|
# SRGB = {
|
|
# 0: np.array((0, 0, 0)), # Black
|
|
# 8: np.array((231, 36, 66)), # Magenta
|
|
# 4: np.array((154, 104, 0)), # Brown
|
|
# 12: np.array((255, 124, 0)), # Orange
|
|
# 2: np.array((0, 135, 45)), # Dark green
|
|
# 10: np.array((104, 104, 104)), # Grey2
|
|
# 6: np.array((0, 222, 0)), # Green
|
|
# 14: np.array((255, 252, 0)), # Yellow
|
|
# 1: np.array((1, 30, 169)), # Dark blue
|
|
# 9: np.array((230, 73, 228)), # Violet
|
|
# 5: np.array((185, 185, 185)), # Grey1
|
|
# 13: np.array((255, 171, 153)), # Pink
|
|
# 3: np.array((47, 69, 255)), # Med blue
|
|
# 11: np.array((120, 187, 255)), # Light blue
|
|
# 7: np.array((83, 250, 208)), # Aqua
|
|
# 15: np.array((255, 255, 255)), # White
|
|
# }
|
|
|
|
|
|
class NTSCPalette(Palette):
|
|
"""8-bit NTSC palette computed by averaging chroma signal over 8 pixels."""
|
|
DISTANCES_PATH = 'data/distances_ntsc.data'
|
|
PALETTE_DEPTH = 8
|
|
|
|
# Computed using ntsc_colours.py
|
|
SRGB = palette_ntsc.SRGB
|
|
|
|
|
|
PALETTES = {
|
|
# 'openemulator': OpenEmulatorPalette,
|
|
# 'virtualii': VirtualIIPalette,
|
|
# 'tohgr': ToHgrPalette,
|
|
'ntsc': NTSCPalette
|
|
}
|
|
|
|
DEFAULT_PALETTE = 'ntsc'
|