Adding upstream version 2.10.36.upstream/2.10.36

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

1 files changed, 178 insertions, 0 deletions

diff --git a/app/operations/gimpoperationthresholdalpha.c b/app/operations/gimpoperationthresholdalpha.c
new file mode 100644
index 0000000..94cbaf5
--- /dev/null
+++ b/app/operations/gimpoperationthresholdalpha.c
@@ -0,0 +1,178 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpoperationthresholdalpha.c
+ * Copyright (C) 2012 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/>.
+ *
+ * Ported from the threshold-alpha plug-in
+ * Copyright (C) 1997 Shuji Narazaki <narazaki@InetQ.or.jp>
+ */
+
+#include "config.h"
+
+#include <gegl.h>
+
+#include "operations-types.h"
+
+#include "gimpoperationthresholdalpha.h"
+
+#include "gimp-intl.h"
+
+
+enum
+{
+  PROP_0,
+  PROP_VALUE
+};
+
+
+static void       gimp_operation_threshold_alpha_get_property (GObject             *object,
+                                                               guint                property_id,
+                                                               GValue              *value,
+                                                               GParamSpec          *pspec);
+static void       gimp_operation_threshold_alpha_set_property (GObject             *object,
+                                                               guint                property_id,
+                                                               const GValue        *value,
+                                                               GParamSpec          *pspec);
+
+static void       gimp_operation_threshold_alpha_prepare      (GeglOperation       *operation);
+static gboolean   gimp_operation_threshold_alpha_process      (GeglOperation       *operation,
+                                                               void                *in_buf,
+                                                               void                *out_buf,
+                                                               glong                samples,
+                                                               const GeglRectangle *roi,
+                                                               gint                 level);
+
+
+G_DEFINE_TYPE (GimpOperationThresholdAlpha, gimp_operation_threshold_alpha,
+               GEGL_TYPE_OPERATION_POINT_FILTER)
+
+#define parent_class gimp_operation_threshold_alpha_parent_class
+
+
+static void
+gimp_operation_threshold_alpha_class_init (GimpOperationThresholdAlphaClass *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_threshold_alpha_set_property;
+  object_class->get_property = gimp_operation_threshold_alpha_get_property;
+
+  gegl_operation_class_set_keys (operation_class,
+                                 "name",        "gimp:threshold-alpha",
+                                 "categories",  "color",
+                                 "description",
+                                 _("Make transparency all-or-nothing, by "
+                                   "thresholding the alpha channel to a value"),
+                                 NULL);
+
+  operation_class->prepare = gimp_operation_threshold_alpha_prepare;
+
+  point_class->process     = gimp_operation_threshold_alpha_process;
+
+  g_object_class_install_property (object_class, PROP_VALUE,
+                                   g_param_spec_double ("value",
+                                                        _("Value"),
+                                                        _("The alpha value"),
+                                                        0.0, 1.0, 0.5,
+                                                        G_PARAM_READWRITE |
+                                                        G_PARAM_CONSTRUCT));
+}
+
+static void
+gimp_operation_threshold_alpha_init (GimpOperationThresholdAlpha *self)
+{
+}
+
+static void
+gimp_operation_threshold_alpha_get_property (GObject    *object,
+                                             guint       property_id,
+                                             GValue     *value,
+                                             GParamSpec *pspec)
+{
+  GimpOperationThresholdAlpha *self = GIMP_OPERATION_THRESHOLD_ALPHA (object);
+
+  switch (property_id)
+    {
+    case PROP_VALUE:
+      g_value_set_double (value, self->value);
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+      break;
+    }
+}
+
+static void
+gimp_operation_threshold_alpha_set_property (GObject      *object,
+                                             guint         property_id,
+                                             const GValue *value,
+                                             GParamSpec   *pspec)
+{
+  GimpOperationThresholdAlpha *self = GIMP_OPERATION_THRESHOLD_ALPHA (object);
+
+  switch (property_id)
+    {
+    case PROP_VALUE:
+      self->value = g_value_get_double (value);
+      break;
+
+   default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+      break;
+    }
+}
+
+static void
+gimp_operation_threshold_alpha_prepare (GeglOperation *operation)
+{
+  const Babl *space = gegl_operation_get_source_space (operation, "input");
+  gegl_operation_set_format (operation, "input",  babl_format_with_space ("RGBA float", space));
+  gegl_operation_set_format (operation, "output", babl_format_with_space ("RGBA float", space));
+}
+
+static gboolean
+gimp_operation_threshold_alpha_process (GeglOperation       *operation,
+                                        void                *in_buf,
+                                        void                *out_buf,
+                                        glong                samples,
+                                        const GeglRectangle *roi,
+                                        gint                 level)
+{
+  GimpOperationThresholdAlpha *self = GIMP_OPERATION_THRESHOLD_ALPHA (operation);
+  gfloat                      *src  = in_buf;
+  gfloat                      *dest = out_buf;
+
+  while (samples--)
+    {
+      dest[RED]   = src[RED];
+      dest[GREEN] = src[GREEN];
+      dest[BLUE]  = src[BLUE];
+
+      if (src[ALPHA] > self->value)
+        dest[ALPHA] = 1.0;
+      else
+        dest[ALPHA] = 0.0;
+
+      src  += 4;
+      dest += 4;
+    }
+
+  return TRUE;
+}