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app: gimpoperationhuesaturation, do processing in non-linear 

Address a regression of hue-sector sizes. The HSL model math in gimp_rgb_to_hsl
and gimp_hsl_to_rgb uses R'G'B' values rather than RGB.

Fixes #10756.
This commit is contained in:
Øyvind Kolås 2024-02-16 22:57:18 +01:00 committed by Øyvind "pippin" Kolås
parent a0990e324d
commit 2d1a02298d
1 changed files with 14 additions and 0 deletions
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14
app/operations/gimpoperationhuesaturation.c
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@ -34,6 +34,7 @@
#include "gimp-intl.h"
static void gimp_operation_hue_saturation_prepare (GeglOperation *operation);
static gboolean gimp_operation_hue_saturation_process (GeglOperation *operation,
void *in_buf,
@ -66,6 +67,7 @@ gimp_operation_hue_saturation_class_init (GimpOperationHueSaturationClass *klass
NULL);
point_class->process = gimp_operation_hue_saturation_process;
operation_class->prepare = gimp_operation_hue_saturation_prepare;
g_object_class_install_property (object_class,
GIMP_OPERATION_POINT_FILTER_PROP_CONFIG,
@ -173,6 +175,18 @@ map_lightness_achromatic (GimpHueSaturationConfig *config, gdouble value)
return value + (v * (1.0 - value));
}
static void
gimp_operation_hue_saturation_prepare (GeglOperation *operation)
{
/* TODO: do the processing of this on in "HSLA float" instead of using
gimp_rgb_to_hsl and gimp_hsl_to_rgb */
const Babl *format = babl_format_with_space ("R'G'B'A float",
gegl_operation_get_format (operation, "input"));
gegl_operation_set_format (operation, "input", format);
gegl_operation_set_format (operation, "output", format);
}
static gboolean
gimp_operation_hue_saturation_process (GeglOperation *operation,
void *in_buf,