Spektrafilm (dev branch) analog film simulation module

data/kernels/programs.conf

@@ -42,3 +42,4 @@ capture.cl              38
 agx.cl                  39
 colorharmonizer.cl      40
 overlay.cl              41
+spektrafilm.cl          42

src/CMakeLists.txt

@@ -88,6 +88,8 @@ FILE(GLOB SOURCE_FILES
   "common/ratings.c"
   "common/resource_limits.c"
   "common/selection.c"
+  "common/spektra_core.c"
+  "common/spektra_sim.c"
   "common/splines.cpp"
   "common/styles.c"
   "common/system_signal_handling.c"
@@ -1018,6 +1020,14 @@ add_library(lib_darktable SHARED ${DARKTABLE_BINDIR}/preferences_gen.h ${DARKTAB
 # since this isn't the same directory we do have to manually set it
 set_source_files_properties(${DARKTABLE_BINDIR}/version_gen.c PROPERTIES GENERATED TRUE)
 
+# spektrafilm: -fno-math-errno tells the compiler math functions never set errno,
+# enabling more aggressive optimization around powf/exp2f/log10f calls.
+set_source_files_properties(
+  "common/spektra_core.c"
+  "common/spektra_sim.c"
+  PROPERTIES COMPILE_OPTIONS "-fno-math-errno"
+)
+
 add_dependencies(lib_darktable generate_styles_string)
 add_dependencies(lib_darktable generate_conf)
 add_dependencies(lib_darktable generate_version)

src/common/iop_order.c

@@ -144,6 +144,7 @@ const dt_iop_order_entry_t legacy_order[] = {
   { {45.5f }, "agx", 0},
   { {46.0f }, "filmic", 0},
   { {46.5f }, "filmicrgb", 0},
+  { { 46.7f }, "spektrafilm", 0 },
   { {47.0f }, "colisa", 0},
   { {48.0f }, "zonesystem", 0},
   { {49.0f }, "tonecurve", 0},
@@ -258,6 +259,7 @@ const dt_iop_order_entry_t v30_order[] = {
   { {45.3f }, "sigmoid", 0},
   { {45.5f }, "agx", 0},
   { {46.0f }, "filmicrgb", 0},       // same, upgraded
+  { { 46.7f }, "spektrafilm", 0 },
   { {36.0f }, "lut3d", 0},           // apply a creative style or film emulation, possibly non-linear
   { {47.0f }, "colisa", 0},          // edit contrast while damaging colour
   { {48.0f }, "tonecurve", 0},       // same
@@ -377,6 +379,7 @@ const dt_iop_order_entry_t v50_order[] = {
   { {45.3f }, "sigmoid", 0},
   { {45.5f }, "agx", 0},
   { {46.0f }, "filmicrgb", 0},       // same, upgraded
+  { { 46.7f }, "spektrafilm", 0 },
   { {36.0f }, "lut3d", 0},           // apply a creative style or film emulation, possibly non-linear
   { {47.0f }, "colisa", 0},          // edit contrast while damaging colour
   { {48.0f }, "tonecurve", 0},       // same
@@ -497,6 +500,7 @@ const dt_iop_order_entry_t v30_jpg_order[] = {
   { {45.5f }, "agx", 0},
   { { 45.3f }, "sigmoid", 0},
   { { 46.0f }, "filmicrgb", 0 },     // same, upgraded
+  { { 46.7f }, "spektrafilm", 0 },
   { { 36.0f }, "lut3d", 0 },         // apply a creative style or film emulation, possibly non-linear
   { { 47.0f }, "colisa", 0 },        // edit contrast while damaging colour
   { { 48.0f }, "tonecurve", 0 },     // same
@@ -619,6 +623,7 @@ const dt_iop_order_entry_t v50_jpg_order[] = {
   { { 45.3f }, "sigmoid", 0},
   { {45.5f }, "agx", 0},
   { { 46.0f }, "filmicrgb", 0 },     // same, upgraded
+  { { 46.7f }, "spektrafilm", 0 },
   { { 36.0f }, "lut3d", 0 },         // apply a creative style or film emulation, possibly non-linear
   { { 47.0f }, "colisa", 0 },        // edit contrast while damaging colour
   { { 48.0f }, "tonecurve", 0 },     // same
@@ -735,6 +740,7 @@ void dt_ioppr_migrate_legacy_iop_order_list(GList *iop_order_list)
   _insert_before(iop_order_list, "nlmeans", "blurs");
   _insert_before(iop_order_list, "filmicrgb", "sigmoid");
   _insert_before(iop_order_list, "filmicrgb", "agx");
+  _insert_before(iop_order_list, "colisa", "spektrafilm");
   _insert_before(iop_order_list, "colorbalancergb", "colorequal");
   _insert_before(iop_order_list, "highlights", "rasterfile");
   _insert_before(iop_order_list, "colorbalance", "colorharmonizer");