Spektrafilm (dev branch) analog film simulation module - #21534

Draft

piratenpanda wants to merge 72 commits into

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piratenpanda:spektrafilm

Commits on Aug 10, 2026

initial darktable spektrafilm commit
piratenpanda
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5901092
Remove superflous mentions of the old module
piratenpanda
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5495dc1
fix film selection dropdown default
piratenpanda
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bd3e4d6
fix for kodak_2302 negative bw paper
piratenpanda
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a4b58a6
reorg files to /common
piratenpanda
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a5b6ec4
Use dt_gaussian_mean_blur_cl instead of fast to avoid border artifacts
piratenpanda
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ad19384
Add advanced options drop down menu to reduce default height of module
piratenpanda
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b51b6be
reset print exposure to 0 EV when enabling auto print exposure
piratenpanda
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a645551
move scan film option to the advanced section as it's a rather automatic setting
piratenpanda
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80a98ad
remove tick from disabled auto print exposure toggle for positive films
piratenpanda
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6dee4f0
Change module to lowercase and write better description
piratenpanda
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789a2d1
register spektrafilm in the legacy iop-order migration path
piratenpanda
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3044903
Add tabbed interface to prepare for more options
piratenpanda
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e488f17
add remaining spektrafilm diffusion filters, add preflash, add pre compression boost option by @Arecsu, better organize print and film tab
piratenpanda
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b210af9
allow manual right click gain amount up to 8
piratenpanda
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801c79d
Prevent accidental double clicking on film and print tab header reset the scan box for positive films
piratenpanda
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d5bddd3
spektrafilm: add print diffusion stage

Arecsu
authored and
piratenpanda
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0908b81
spektrafilm: improve code comments

Arecsu
authored and
piratenpanda
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1cf631a
spektrafilm: GPU optimization — gauss pre-allocation, async boost, tmpb elimination

Arecsu
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piratenpanda
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4bdb6ab
spektrafilm: CPU optimization — transposed blur, bilinear/trilinear, fast math

Arecsu
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piratenpanda
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dfb7e6c
spektrafilm: -fno-math-errno flag + NEON matrix multiply for expose

Arecsu
authored and
piratenpanda
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3e9ef12
add migration for new print diffusion stage
piratenpanda
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08b8ec1
Halation now behaves like original spektrafilm, per film and we now expose all tuning parameters like the original
piratenpanda
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f9e66b7
Make halation amount behave like the original
piratenpanda
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d8ea8c2
add strength to halation and grain sliders to clarify
piratenpanda
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bef01b0
additional safeguards to not reset to wrong values on tab double click
piratenpanda
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fe38622
spektrafilm: group film/print dropdowns by color/monochrome sections

Arecsu
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piratenpanda
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f0c1ade
spektrafilm: natural sort for profile lists

Arecsu
authored and
piratenpanda
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cef974a
move away from darktable gaussians and use the same as spektrafilm
piratenpanda
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9cd06fb
move grain to multi sublayer
piratenpanda
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ef1d842
add calibration constant to make grain behave more like spektrafilm
piratenpanda
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162489b
improve performance
piratenpanda
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fcaae2f
more performance improvements
piratenpanda
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283f7a9
spektrafilm: multiplicative unsharp mask after grain blur

Arecsu
authored and
piratenpanda
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738c728
spektrafilm: fix grain brightness shift across zoom levels

Arecsu
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piratenpanda
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d869069
spektrafilm: fix fireflies in grain recovery USM

Arecsu
authored and
piratenpanda
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9eac864
fix grain changing exposure and add picker to pre compression boost
piratenpanda
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a05bdb6
fix comment
piratenpanda
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1bd571e
add development section with push pull and gamma settings
piratenpanda
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858b71b
turn auto print exposure off by default and move development and preflash to advanced
piratenpanda
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b46bf21
rename film and print to media
piratenpanda
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53067a2
fix picker segfaulting
piratenpanda
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736e14c
fix grain color cast
piratenpanda
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3b94f1e
fix module reset not always resetting to default parameters the first time
piratenpanda
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e23eb9d
use long side for film format and default to 35mm
piratenpanda
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a5c84a0
make grain adhere to reference implementation and set default parameters
piratenpanda
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0f78028
restructure UI on feedback
piratenpanda
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7324a4e
fix USM oversharpening on zoom out
piratenpanda
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4b4c351
safeguard scan button from resetting
piratenpanda
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737eecf
remove stale code, make algorithms adhere to spektrafilm ref code, add missing glare stage and scanner feature set
piratenpanda
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557bfb7
more fixes for BW films, expose development time for films and papers that support it
piratenpanda
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411751c
Set development time slider to stock/paper default, have one slider in film and print for the respective part, reset to default value
piratenpanda
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44c2bbb
limit DIR coupler range to 1 to keep it invertible
piratenpanda
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849f1e9
follow the Bauhaus checkbox changes
piratenpanda
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67deff3
Reset module to v1, remove special checkbox handling as this is now a proper bauhaus widget, add blank lines between routined, use GList where necessary, use dt_hash(), add underscore prefex to sta…
piratenpanda
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2de45a4
move to float16 LUT as reference, fix grain opencl path again, fix diffusion filters and clarify scatter
piratenpanda
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fde1c1f
Updates to user feedback
piratenpanda
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941fbc2
fix(ui): add spektrafilm to modules list

yuri1969
authored and
piratenpanda
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16fcfb4
blur whole grained desity field and not only delta to match reference and avoid oversharpening
piratenpanda
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f0a8781
spektrafilm: run grain USM on absolute density to match reference

Arecsu
authored and
piratenpanda
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902e34d
Provide download functionality for missing pack data
piratenpanda
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aa26701
clarify tool tips on user feedback
piratenpanda
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33980ad
add format header
piratenpanda
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0d6b4ae
move to inline labels again for film, paper and format. Soft limit preflash range to 0.5
piratenpanda
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ede2b49
support pack v2 files, fix Tri-X column layout to follow upstream spektrafilM
piratenpanda
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34dbebb
add surface adaptation code
piratenpanda
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2382216
fix opencl for more than one opencl runtime
piratenpanda
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9300181
Turn spectral adaptation off by default as in reference spektrafilm. Also show paper name on auto mode
piratenpanda
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1f50dfe
add switch for bandwidth adaption and rename section to advanced
piratenpanda
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b4270d9
remove references to the reference
piratenpanda
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357168d
port unit test suite from reference
piratenpanda
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bcffcf2
remove patch file
piratenpanda
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f919705