Adding upstream version 2.10.22.upstream/2.10.22upstream

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

1 files changed, 188 insertions, 0 deletions

diff --git a/app/operations/gimpoperationsetalpha.c b/app/operations/gimpoperationsetalpha.c
new file mode 100644
index 0000000..b41af3c
--- /dev/null
+++ b/app/operations/gimpoperationsetalpha.c
@@ -0,0 +1,188 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpoperationsetalpha.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/>.
+ */
+
+#include "config.h"
+
+#include <gegl.h>
+
+#include "operations-types.h"
+
+#include "gimpoperationsetalpha.h"
+
+
+enum
+{
+  PROP_0,
+  PROP_VALUE
+};
+
+
+static void       gimp_operation_set_alpha_get_property (GObject             *object,
+                                                         guint                property_id,
+                                                         GValue              *value,
+                                                         GParamSpec          *pspec);
+static void       gimp_operation_set_alpha_set_property (GObject             *object,
+                                                         guint                property_id,
+                                                         const GValue        *value,
+                                                         GParamSpec          *pspec);
+
+static void       gimp_operation_set_alpha_prepare      (GeglOperation       *operation);
+static gboolean   gimp_operation_set_alpha_process      (GeglOperation       *operation,
+                                                         void                *in_buf,
+                                                         void                *aux_buf,
+                                                         void                *out_buf,
+                                                         glong                samples,
+                                                         const GeglRectangle *roi,
+                                                         gint                 level);
+
+
+G_DEFINE_TYPE (GimpOperationSetAlpha, gimp_operation_set_alpha,
+               GEGL_TYPE_OPERATION_POINT_COMPOSER)
+
+#define parent_class gimp_operation_set_alpha_parent_class
+
+
+static void
+gimp_operation_set_alpha_class_init (GimpOperationSetAlphaClass *klass)
+{
+  GObjectClass                    *object_class    = G_OBJECT_CLASS (klass);
+  GeglOperationClass              *operation_class = GEGL_OPERATION_CLASS (klass);
+  GeglOperationPointComposerClass *point_class     = GEGL_OPERATION_POINT_COMPOSER_CLASS (klass);
+
+  object_class->set_property = gimp_operation_set_alpha_set_property;
+  object_class->get_property = gimp_operation_set_alpha_get_property;
+
+  gegl_operation_class_set_keys (operation_class,
+                                 "name",        "gimp:set-alpha",
+                                 "categories",  "color",
+                                 "description", "Set a buffer's alpha channel to a value",
+                                 NULL);
+
+  operation_class->prepare = gimp_operation_set_alpha_prepare;
+
+  point_class->process     = gimp_operation_set_alpha_process;
+
+  g_object_class_install_property (object_class, PROP_VALUE,
+                                   g_param_spec_double ("value",
+                                                        "Value",
+                                                        "The alpha value",
+                                                        0.0, 1.0, 1.0,
+                                                        G_PARAM_READWRITE |
+                                                        G_PARAM_CONSTRUCT));
+}
+
+static void
+gimp_operation_set_alpha_init (GimpOperationSetAlpha *self)
+{
+}
+
+static void
+gimp_operation_set_alpha_get_property (GObject    *object,
+                                       guint       property_id,
+                                       GValue     *value,
+                                       GParamSpec *pspec)
+{
+  GimpOperationSetAlpha *self = GIMP_OPERATION_SET_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_set_alpha_set_property (GObject      *object,
+                                       guint         property_id,
+                                       const GValue *value,
+                                       GParamSpec   *pspec)
+{
+  GimpOperationSetAlpha *self = GIMP_OPERATION_SET_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_set_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, "aux",    babl_format_with_space ("Y float", space));
+  gegl_operation_set_format (operation, "output", babl_format_with_space ("RGBA float", space));
+}
+
+static gboolean
+gimp_operation_set_alpha_process (GeglOperation       *operation,
+                                  void                *in_buf,
+                                  void                *aux_buf,
+                                  void                *out_buf,
+                                  glong                samples,
+                                  const GeglRectangle *roi,
+                                  gint                 level)
+{
+  GimpOperationSetAlpha *self = GIMP_OPERATION_SET_ALPHA (operation);
+  gfloat                *src  = in_buf;
+  gfloat                *aux  = aux_buf;
+  gfloat                *dest = out_buf;
+
+  if (aux)
+    {
+      while (samples--)
+        {
+          dest[RED]   = src[RED];
+          dest[GREEN] = src[GREEN];
+          dest[BLUE]  = src[BLUE];
+          dest[ALPHA] = self->value * *aux;
+
+          src  += 4;
+          aux  += 1;
+          dest += 4;
+        }
+    }
+  else
+    {
+      while (samples--)
+        {
+          dest[RED]   = src[RED];
+          dest[GREEN] = src[GREEN];
+          dest[BLUE]  = src[BLUE];
+          dest[ALPHA] = self->value;
+
+          src  += 4;
+          dest += 4;
+        }
+    }
+
+  return TRUE;
+}