add a way to get segments from tone curves

- Add a way to get segments from tone curves
- Add a check for windows in meson file of fast-float plugin

4 files changed, 17 insertions, 12 deletions

diff --git a/include/lcms2.h b/include/lcms2.h
index 924d40b..2876ac8 100644
--- a/include/lcms2.h
+++ b/include/lcms2.h
@@ -1222,6 +1222,8 @@ CMSAPI cmsInt32Number    CMSEXPORT cmsGetToneCurveParametricType(const cmsToneCu
 CMSAPI cmsFloat64Number  CMSEXPORT cmsEstimateGamma(const cmsToneCurve* t, cmsFloat64Number Precision);
 CMSAPI cmsFloat64Number* CMSEXPORT cmsGetToneCurveParams(const cmsToneCurve* t);
 
+CMSAPI const cmsCurveSegment* CMSEXPORT cmsGetToneCurveSegment(cmsInt32Number n, const cmsToneCurve* t);
+
 // Tone curve tabular estimation
 CMSAPI cmsUInt32Number         CMSEXPORT cmsGetToneCurveEstimatedTableEntries(const cmsToneCurve* t);
 CMSAPI const cmsUInt16Number*  CMSEXPORT cmsGetToneCurveEstimatedTable(const cmsToneCurve* t);
diff --git a/plugins/fast_float/src/meson.build b/plugins/fast_float/src/meson.build
index e907c3b..c53639c 100644
--- a/plugins/fast_float/src/meson.build
+++ b/plugins/fast_float/src/meson.build
@@ -19,13 +19,16 @@ lcms2_fast_float_sources = files(
 lcms2_fast_float_incdir = include_directories('../include', '.')
 
 if host_machine.system() == 'windows'
-  lcms2_fast_float_rc = configure_file(
-    input: 'lcms2_fast_float.rc.in',
-    configuration: version_cfg,
-    output: 'lcms2_fast_float.rc',
-  )
+ if get_option('default_library') == 'shared'
 
-  lcms2_fast_float_sources += win.compile_resources(lcms2_fast_float_rc)
+     lcms2_fast_float_rc = configure_file(
+        input: 'lcms2_fast_float.rc.in',
+        configuration: version_cfg,
+        output: 'lcms2_fast_float.rc',
+    )
+
+    lcms2_fast_float_sources += win.compile_resources(lcms2_fast_float_rc)
+  endif
 endif
 
 liblcms2_fast_float = library(
diff --git a/src/cmsgamma.c b/src/cmsgamma.c
index 1031fc1..24b2ada 100644
--- a/src/cmsgamma.c
+++ b/src/cmsgamma.c
@@ -1491,13 +1491,13 @@ cmsFloat64Number CMSEXPORT cmsEstimateGamma(const cmsToneCurve* t, cmsFloat64Num
     return (sum / n);   // The mean
 }
 
+// Retrieve segments on tone curves
 
-// Retrieve parameters on one-segment tone curves
-
-cmsFloat64Number* CMSEXPORT cmsGetToneCurveParams(const cmsToneCurve* t)
+const cmsCurveSegment* CMSEXPORT cmsGetToneCurveSegment(cmsInt32Number n, const cmsToneCurve* t)
 {
     _cmsAssert(t != NULL);
 
-    if (t->nSegments != 1) return NULL;
-    return t->Segments[0].Params;
+    if (n < 0 || n >= (cmsInt32Number) t->nSegments) return NULL;
+    return t->Segments + n;
 }
+
diff --git a/src/lcms2.def b/src/lcms2.def
index b9ce630..5bd2678 100644
--- a/src/lcms2.def
+++ b/src/lcms2.def
@@ -362,7 +362,7 @@ cmsMD5add                                =   cmsMD5add
 cmsMD5alloc                              =   cmsMD5alloc

 cmsMD5finish                             =   cmsMD5finish

 _cmsComputeInterpParams                  =   _cmsComputeInterpParams

-cmsGetToneCurveParams                    =   cmsGetToneCurveParams

+cmsGetToneCurveSegment                   =   cmsGetToneCurveSegment

 cmsDetectRGBProfileGamma                 =   cmsDetectRGBProfileGamma

 _cmsOptimizePipeline                     =   _cmsOptimizePipeline

 _cmsReasonableGridpointsByColorspace     =   _cmsReasonableGridpointsByColorspace