fImgs = [[ao, ao_srgb], [roughness, roughness_srgb], [metallic, metallic_srgb],
[emissive, emissive_srgb]]
imgs = {}
foundSize = False
for i in range(len(fImgs)):
fImg, is_sRGB = fImgs[i]
if fImg.exists():
img = PNMImage()
img.read(fImg)
img.makeRgb()
if is_sRGB:
# Convert to linear
print("Converting", getChannelName(i), "to linear")
img.applyExponent(2.2)
if not foundSize:
size = [img.getReadXSize(), img.getReadYSize()]
foundSize = True
imgs[i] = img
else:
# assume it is a constant value
val = float(fImg.getFullpath())
if is_sRGB:
print("Converting", getChannelName(i), "to linear")
# Convert to linear
val = math.pow(val, 2.2)
imgs[i] = val
print("Size:", size)
from panda3d.core import PNMImage, Filename
inputFile = raw_input("Input linear image: ")
inputFilename = Filename.fromOsSpecific(inputFile)
outputFile = raw_input("Output sRGB image: ")
outputFilename = Filename.fromOsSpecific(outputFile)
img = PNMImage()
img.read(inputFilename)
img.applyExponent(1.0 / 2.2)
img.write(outputFilename)
print("Done")
