Adding upstream version 2.10.36.upstream/2.10.36

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 302 insertions, 0 deletions

diff --git a/app/operations/gimpoperationhuesaturation.c b/app/operations/gimpoperationhuesaturation.c
new file mode 100644
index 0000000..cdfb7d7
--- /dev/null
+++ b/app/operations/gimpoperationhuesaturation.c
@@ -0,0 +1,302 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpoperationhuesaturation.c
+ * Copyright (C) 2007 Michael Natterer <mitch@gimp.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <cairo.h>
+#include <gegl.h>
+#include <gdk-pixbuf/gdk-pixbuf.h>
+
+#include "libgimpcolor/gimpcolor.h"
+#include "libgimpmath/gimpmath.h"
+
+#include "operations-types.h"
+
+#include "gimphuesaturationconfig.h"
+#include "gimpoperationhuesaturation.h"
+
+#include "gimp-intl.h"
+
+
+static gboolean gimp_operation_hue_saturation_process (GeglOperation       *operation,
+                                                       void                *in_buf,
+                                                       void                *out_buf,
+                                                       glong                samples,
+                                                       const GeglRectangle *roi,
+                                                       gint                 level);
+
+
+G_DEFINE_TYPE (GimpOperationHueSaturation, gimp_operation_hue_saturation,
+               GIMP_TYPE_OPERATION_POINT_FILTER)
+
+#define parent_class gimp_operation_hue_saturation_parent_class
+
+
+static void
+gimp_operation_hue_saturation_class_init (GimpOperationHueSaturationClass *klass)
+{
+  GObjectClass                  *object_class    = G_OBJECT_CLASS (klass);
+  GeglOperationClass            *operation_class = GEGL_OPERATION_CLASS (klass);
+  GeglOperationPointFilterClass *point_class     = GEGL_OPERATION_POINT_FILTER_CLASS (klass);
+
+  object_class->set_property   = gimp_operation_point_filter_set_property;
+  object_class->get_property   = gimp_operation_point_filter_get_property;
+
+  gegl_operation_class_set_keys (operation_class,
+                                 "name",        "gimp:hue-saturation",
+                                 "categories",  "color",
+                                 "description", _("Adjust hue, saturation, and lightness"),
+                                 NULL);
+
+  point_class->process = gimp_operation_hue_saturation_process;
+
+  g_object_class_install_property (object_class,
+                                   GIMP_OPERATION_POINT_FILTER_PROP_CONFIG,
+                                   g_param_spec_object ("config",
+                                                        "Config",
+                                                        "The config object",
+                                                        GIMP_TYPE_HUE_SATURATION_CONFIG,
+                                                        G_PARAM_READWRITE |
+                                                        G_PARAM_CONSTRUCT));
+}
+
+static void
+gimp_operation_hue_saturation_init (GimpOperationHueSaturation *self)
+{
+}
+
+static inline gdouble
+map_hue (GimpHueSaturationConfig *config,
+         GimpHueRange             range,
+         gdouble                  value)
+{
+  value += (config->hue[GIMP_HUE_RANGE_ALL] + config->hue[range]) / 2.0;
+
+  if (value < 0)
+    return value + 1.0;
+  else if (value > 1.0)
+    return value - 1.0;
+  else
+    return value;
+}
+
+static inline gdouble
+map_hue_overlap (GimpHueSaturationConfig *config,
+                 GimpHueRange             primary_range,
+                 GimpHueRange             secondary_range,
+                 gdouble                  value,
+                 gdouble                  primary_intensity,
+                 gdouble                  secondary_intensity)
+{
+  /*  When calculating an overlap between two ranges, interpolate the
+   *  hue adjustment from config->hue[primary_range] and
+   *  config->hue[secondary_range] BEFORE mapping it to the input
+   *  value.  This fixes odd edge cases where only one of the ranges
+   *  crosses the red/magenta wraparound (bug #527085), or if
+   *  adjustments to different channels yield more than 180 degree
+   *  difference from each other. (Why anyone would do that is beyond
+   *  me, but still.)
+   *
+   *  See bugs #527085 and #644032 for examples of such cases.
+   */
+  gdouble v = config->hue[primary_range]   * primary_intensity +
+              config->hue[secondary_range] * secondary_intensity;
+
+  value += (config->hue[GIMP_HUE_RANGE_ALL] + v) / 2.0;
+
+  if (value < 0)
+    return value + 1.0;
+  else if (value > 1.0)
+    return value - 1.0;
+  else
+    return value;
+}
+
+static inline gdouble
+map_saturation (GimpHueSaturationConfig *config,
+                GimpHueRange             range,
+                gdouble                  value)
+{
+  gdouble v = config->saturation[GIMP_HUE_RANGE_ALL] + config->saturation[range];
+
+  /* This change affects the way saturation is computed. With the old
+   * code (different code for value < 0), increasing the saturation
+   * affected muted colors very much, and bright colors less. With the
+   * new code, it affects muted colors and bright colors more or less
+   * evenly. For enhancing the color in photos, the new behavior is
+   * exactly what you want. It's hard for me to imagine a case in
+   * which the old behavior is better.
+  */
+  value *= (v + 1.0);
+
+  return CLAMP (value, 0.0, 1.0);
+}
+
+static inline gdouble
+map_lightness (GimpHueSaturationConfig *config,
+               GimpHueRange             range,
+               gdouble                  value)
+{
+  gdouble v = (config->lightness[GIMP_HUE_RANGE_ALL] + config->lightness[range]) / 2.0;
+
+  if (v < 0)
+    return value * (v + 1.0);
+  else
+    return value + (v * (1.0 - value));
+}
+
+static gboolean
+gimp_operation_hue_saturation_process (GeglOperation       *operation,
+                                       void                *in_buf,
+                                       void                *out_buf,
+                                       glong                samples,
+                                       const GeglRectangle *roi,
+                                       gint                 level)
+{
+  GimpOperationPointFilter *point  = GIMP_OPERATION_POINT_FILTER (operation);
+  GimpHueSaturationConfig  *config = GIMP_HUE_SATURATION_CONFIG (point->config);
+  gfloat                   *src    = in_buf;
+  gfloat                   *dest   = out_buf;
+  gfloat                    overlap;
+
+  if (! config)
+    return FALSE;
+
+  overlap = config->overlap / 2.0;
+
+  while (samples--)
+    {
+      GimpRGB  rgb;
+      GimpHSL  hsl;
+      gdouble  h;
+      gint     hue_counter;
+      gint     hue                 = 0;
+      gint     secondary_hue       = 0;
+      gboolean use_secondary_hue   = FALSE;
+      gfloat   primary_intensity   = 0.0;
+      gfloat   secondary_intensity = 0.0;
+
+      rgb.r = src[RED];
+      rgb.g = src[GREEN];
+      rgb.b = src[BLUE];
+      rgb.a = src[ALPHA];
+
+      gimp_rgb_to_hsl (&rgb, &hsl);
+
+      h = hsl.h * 6.0;
+
+      for (hue_counter = 0; hue_counter < 7; hue_counter++)
+        {
+          gdouble hue_threshold = (gdouble) hue_counter + 0.5;
+
+          if (h < ((gdouble) hue_threshold + overlap))
+            {
+              hue = hue_counter;
+
+              if (overlap > 0.0 && h > ((gdouble) hue_threshold - overlap))
+                {
+                  use_secondary_hue = TRUE;
+
+                  secondary_hue = hue_counter + 1;
+
+                  secondary_intensity =
+                    (h - (gdouble) hue_threshold + overlap) / (2.0 * overlap);
+
+                  primary_intensity = 1.0 - secondary_intensity;
+                }
+              else
+                {
+                  use_secondary_hue = FALSE;
+                }
+
+              break;
+            }
+        }
+
+      if (hue >= 6)
+        {
+          hue = 0;
+          use_secondary_hue = FALSE;
+        }
+
+      if (secondary_hue >= 6)
+        {
+          secondary_hue = 0;
+        }
+
+      /*  transform into GimpHueRange values  */
+      hue++;
+      secondary_hue++;
+
+      if (use_secondary_hue)
+        {
+          hsl.h = map_hue_overlap (config, hue, secondary_hue, hsl.h,
+                                   primary_intensity, secondary_intensity);
+
+          hsl.s = (map_saturation (config, hue,           hsl.s) * primary_intensity +
+                   map_saturation (config, secondary_hue, hsl.s) * secondary_intensity);
+
+          hsl.l = (map_lightness (config, hue,           hsl.l) * primary_intensity +
+                   map_lightness (config, secondary_hue, hsl.l) * secondary_intensity);
+        }
+      else
+        {
+          hsl.h = map_hue        (config, hue, hsl.h);
+          hsl.s = map_saturation (config, hue, hsl.s);
+          hsl.l = map_lightness  (config, hue, hsl.l);
+        }
+
+      gimp_hsl_to_rgb (&hsl, &rgb);
+
+      dest[RED]   = rgb.r;
+      dest[GREEN] = rgb.g;
+      dest[BLUE]  = rgb.b;
+      dest[ALPHA] = rgb.a;
+
+      src  += 4;
+      dest += 4;
+    }
+
+  return TRUE;
+}
+
+
+/*  public functions  */
+
+void
+gimp_operation_hue_saturation_map (GimpHueSaturationConfig *config,
+                                   const GimpRGB           *color,
+                                   GimpHueRange             range,
+                                   GimpRGB                 *result)
+{
+  GimpHSL hsl;
+
+  g_return_if_fail (GIMP_IS_HUE_SATURATION_CONFIG (config));
+  g_return_if_fail (color != NULL);
+  g_return_if_fail (result != NULL);
+
+  gimp_rgb_to_hsl (color, &hsl);
+
+  hsl.h = map_hue        (config, range, hsl.h);
+  hsl.s = map_saturation (config, range, hsl.s);
+  hsl.l = map_lightness  (config, range, hsl.l);
+
+  gimp_hsl_to_rgb (&hsl, result);
+}