Ghostscript (gstoraster): add halftone gamma value#161
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tillkamppeter merged 2 commits intoJun 23, 2026
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By default, Ghostscript applies 0.8 exponent as a gamma curve, which makes levels a bit washed out. Remove this gamma curve by default, as it's done for genordered.
halftone-type=spot[-frequency][-angle][-dotshape][-gamma] halftone-type=genordered[-frequency][-angle][-dotshape][-gamma] Gamma is a fraction of exponent value, 1-99, where 99 covers almost all levels and 1 produces very light faint image. gamma 80 = pixel ^ 0.80
This was referenced Jun 23, 2026
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Ghostscript filters (gsto...): add halftone gamma value
Gamma is a fraction of exponent value, 1-99, where 99 covers
almost all levels and 1 produces very light faint image.
gamma 80 = pixel ^ 0.80