[gimp/goat-invasion] app: add GimpOperationSetAlpha which sets the alpha channel to a value
- From: Michael Natterer <mitch src gnome org>
- To: commits-list gnome org
- Cc:
- Subject: [gimp/goat-invasion] app: add GimpOperationSetAlpha which sets the alpha channel to a value
- Date: Sat, 17 Mar 2012 15:24:55 +0000 (UTC)
commit abbf5c6c32c94a62743be5d3591b5268e6dbd9f4
Author: Michael Natterer <mitch gimp org>
Date: Sat Mar 17 16:22:59 2012 +0100
app: add GimpOperationSetAlpha which sets the alpha channel to a value
app/gegl/Makefile.am | 11 ++-
app/gegl/gimp-gegl-types.h | 1 +
app/gegl/gimp-gegl.c | 9 ++-
app/gegl/gimpoperationsetalpha.c | 152 ++++++++++++++++++++++++++++++++++++++
app/gegl/gimpoperationsetalpha.h | 55 ++++++++++++++
5 files changed, 222 insertions(+), 6 deletions(-)
---
diff --git a/app/gegl/Makefile.am b/app/gegl/Makefile.am
index f562e3b..1340cc6 100644
--- a/app/gegl/Makefile.am
+++ b/app/gegl/Makefile.am
@@ -48,6 +48,13 @@ libappgegl_a_sources = \
gimpthresholdconfig.c \
gimpthresholdconfig.h \
\
+ gimpoperationcagecoefcalc.c \
+ gimpoperationcagecoefcalc.h \
+ gimpoperationcagetransform.c \
+ gimpoperationcagetransform.h \
+ gimpoperationsetalpha.c \
+ gimpoperationsetalpha.h \
+ \
gimpoperationpointfilter.c \
gimpoperationpointfilter.h \
gimpoperationbrightnesscontrast.c \
@@ -56,10 +63,6 @@ libappgegl_a_sources = \
gimpoperationcolorbalance.h \
gimpoperationcolorize.c \
gimpoperationcolorize.h \
- gimpoperationcagecoefcalc.c \
- gimpoperationcagecoefcalc.h \
- gimpoperationcagetransform.c \
- gimpoperationcagetransform.h \
gimpoperationcurves.c \
gimpoperationcurves.h \
gimpoperationdesaturate.c \
diff --git a/app/gegl/gimp-gegl-types.h b/app/gegl/gimp-gegl-types.h
index 130fd09..5eddece 100644
--- a/app/gegl/gimp-gegl-types.h
+++ b/app/gegl/gimp-gegl-types.h
@@ -32,6 +32,7 @@ typedef struct _GimpOperationTileSource GimpOperationTileSource;
typedef struct _GimpOperationCageCoefCalc GimpOperationCageCoefCalc;
typedef struct _GimpOperationCageTransform GimpOperationCageTransform;
+typedef struct _GimpOperationSetAlpha GimpOperationSetAlpha;
typedef struct _GimpOperationPointFilter GimpOperationPointFilter;
typedef struct _GimpOperationBrightnessContrast GimpOperationBrightnessContrast;
diff --git a/app/gegl/gimp-gegl.c b/app/gegl/gimp-gegl.c
index 9d8d978..f714888 100644
--- a/app/gegl/gimp-gegl.c
+++ b/app/gegl/gimp-gegl.c
@@ -31,9 +31,12 @@
#include "core/gimp.h"
#include "gimp-gegl.h"
-#include "gimpoperationbrightnesscontrast.h"
+
#include "gimpoperationcagecoefcalc.h"
#include "gimpoperationcagetransform.h"
+#include "gimpoperationsetalpha.h"
+
+#include "gimpoperationbrightnesscontrast.h"
#include "gimpoperationcolorbalance.h"
#include "gimpoperationcolorize.h"
#include "gimpoperationcurves.h"
@@ -114,9 +117,11 @@ gimp_gegl_init (Gimp *gimp)
babl_component ("A"),
NULL);
- g_type_class_ref (GIMP_TYPE_OPERATION_BRIGHTNESS_CONTRAST);
g_type_class_ref (GIMP_TYPE_OPERATION_CAGE_COEF_CALC);
g_type_class_ref (GIMP_TYPE_OPERATION_CAGE_TRANSFORM);
+ g_type_class_ref (GIMP_TYPE_OPERATION_SET_ALPHA);
+
+ g_type_class_ref (GIMP_TYPE_OPERATION_BRIGHTNESS_CONTRAST);
g_type_class_ref (GIMP_TYPE_OPERATION_COLOR_BALANCE);
g_type_class_ref (GIMP_TYPE_OPERATION_COLORIZE);
g_type_class_ref (GIMP_TYPE_OPERATION_CURVES);
diff --git a/app/gegl/gimpoperationsetalpha.c b/app/gegl/gimpoperationsetalpha.c
new file mode 100644
index 0000000..7b55452
--- /dev/null
+++ b/app/gegl/gimpoperationsetalpha.c
@@ -0,0 +1,152 @@
+/* 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 <http://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gegl.h>
+
+#include "gimp-gegl-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 gboolean gimp_operation_set_alpha_process (GeglOperation *operation,
+ void *in_buf,
+ void *out_buf,
+ glong samples,
+ const GeglRectangle *roi);
+
+
+G_DEFINE_TYPE (GimpOperationSetAlpha, gimp_operation_set_alpha,
+ GEGL_TYPE_OPERATION_POINT_FILTER)
+
+#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);
+ GeglOperationPointFilterClass *point_class = GEGL_OPERATION_POINT_FILTER_CLASS (klass);
+
+ object_class->set_property = gimp_operation_set_alpha_set_property;
+ object_class->get_property = gimp_operation_set_alpha_get_property;
+
+ operation_class->name = "gimp:set-alpha";
+ operation_class->categories = "color";
+ operation_class->description = "Set a buffer's alpha channel to a value";
+
+ 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 gboolean
+gimp_operation_set_alpha_process (GeglOperation *operation,
+ void *in_buf,
+ void *out_buf,
+ glong samples,
+ const GeglRectangle *roi)
+{
+ GimpOperationSetAlpha *self = GIMP_OPERATION_SET_ALPHA (operation);
+ gfloat *src = in_buf;
+ gfloat *dest = out_buf;
+
+ while (samples--)
+ {
+ dest[RED] = src[RED];
+ dest[GREEN] = src[GREEN];
+ dest[BLUE] = src[BLUE];
+ dest[ALPHA] = self->value;
+
+ src += 4;
+ dest += 4;
+ }
+
+ return TRUE;
+}
diff --git a/app/gegl/gimpoperationsetalpha.h b/app/gegl/gimpoperationsetalpha.h
new file mode 100644
index 0000000..d90dd81
--- /dev/null
+++ b/app/gegl/gimpoperationsetalpha.h
@@ -0,0 +1,55 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpoperationsetalpha.h
+ * 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 <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_OPERATION_SET_ALPHA_H__
+#define __GIMP_OPERATION_SET_ALPHA_H__
+
+
+#include <gegl-plugin.h>
+#include <operation/gegl-operation-point-filter.h>
+
+
+#define GIMP_TYPE_OPERATION_SET_ALPHA (gimp_operation_set_alpha_get_type ())
+#define GIMP_OPERATION_SET_ALPHA(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_OPERATION_SET_ALPHA, GimpOperationSetAlpha))
+#define GIMP_OPERATION_SET_ALPHA_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GIMP_TYPE_OPERATION_SET_ALPHA, GimpOperationSetAlphaClass))
+#define GIMP_IS_OPERATION_SET_ALPHA(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_OPERATION_SET_ALPHA))
+#define GIMP_IS_OPERATION_SET_ALPHA_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GIMP_TYPE_OPERATION_SET_ALPHA))
+#define GIMP_OPERATION_SET_ALPHA_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GIMP_TYPE_OPERATION_SET_ALPHA, GimpOperationSetAlphaClass))
+
+
+typedef struct _GimpOperationSetAlphaClass GimpOperationSetAlphaClass;
+
+struct _GimpOperationSetAlpha
+{
+ GeglOperationPointFilter parent_instance;
+
+ gdouble value;
+};
+
+struct _GimpOperationSetAlphaClass
+{
+ GeglOperationPointFilterClass parent_class;
+};
+
+
+GType gimp_operation_set_alpha_get_type (void) G_GNUC_CONST;
+
+
+#endif /* __GIMP_OPERATION_SET_ALPHA_H__ */
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