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Diffstat (limited to 'app/operations/gimpoperationscalarmultiply.c')
| -rw-r--r-- | app/operations/gimpoperationscalarmultiply.c | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/app/operations/gimpoperationscalarmultiply.c b/app/operations/gimpoperationscalarmultiply.c new file mode 100644 index 0000000..6416300 --- /dev/null +++ b/app/operations/gimpoperationscalarmultiply.c @@ -0,0 +1,189 @@ +/* GIMP - The GNU Image Manipulation Program + * Copyright (C) 1995 Spencer Kimball and Peter Mattis + * + * gimpoperationscalarmultiply.c + * Copyright (C) 2014 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 "gimpoperationscalarmultiply.h" + + +enum +{ + PROP_0, + PROP_N_COMPONENTS, + PROP_FACTOR +}; + + +static void gimp_operation_scalar_multiply_get_property (GObject *object, + guint property_id, + GValue *value, + GParamSpec *pspec); +static void gimp_operation_scalar_multiply_set_property (GObject *object, + guint property_id, + const GValue *value, + GParamSpec *pspec); + +static void gimp_operation_scalar_multiply_prepare (GeglOperation *operation); +static gboolean gimp_operation_scalar_multiply_process (GeglOperation *operation, + void *in_buf, + void *out_buf, + glong samples, + const GeglRectangle *roi, + gint level); + + +G_DEFINE_TYPE (GimpOperationScalarMultiply, gimp_operation_scalar_multiply, + GEGL_TYPE_OPERATION_POINT_FILTER) + +#define parent_class gimp_operation_scalar_multiply_parent_class + + +static void +gimp_operation_scalar_multiply_class_init (GimpOperationScalarMultiplyClass *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_scalar_multiply_set_property; + object_class->get_property = gimp_operation_scalar_multiply_get_property; + + gegl_operation_class_set_keys (operation_class, + "name", "gimp:scalar-multiply", + "categories", "gimp", + "description", "Multiply all floats in a buffer by a factor", + NULL); + + operation_class->prepare = gimp_operation_scalar_multiply_prepare; + + point_class->process = gimp_operation_scalar_multiply_process; + + g_object_class_install_property (object_class, PROP_N_COMPONENTS, + g_param_spec_int ("n-components", + "N Components", + "Number of components in the input/output vectors", + 1, 16, 2, + G_PARAM_READWRITE | + G_PARAM_CONSTRUCT)); + + g_object_class_install_property (object_class, PROP_FACTOR, + g_param_spec_double ("factor", + "Factor", + "The scalar factor", + G_MINFLOAT, G_MAXFLOAT, + 1.0, + G_PARAM_READWRITE | + G_PARAM_CONSTRUCT)); +} + +static void +gimp_operation_scalar_multiply_init (GimpOperationScalarMultiply *self) +{ +} + +static void +gimp_operation_scalar_multiply_get_property (GObject *object, + guint property_id, + GValue *value, + GParamSpec *pspec) +{ + GimpOperationScalarMultiply *self = GIMP_OPERATION_SCALAR_MULTIPLY (object); + + switch (property_id) + { + case PROP_N_COMPONENTS: + g_value_set_int (value, self->n_components); + break; + + case PROP_FACTOR: + g_value_set_double (value, self->factor); + break; + + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); + break; + } +} + +static void +gimp_operation_scalar_multiply_set_property (GObject *object, + guint property_id, + const GValue *value, + GParamSpec *pspec) +{ + GimpOperationScalarMultiply *self = GIMP_OPERATION_SCALAR_MULTIPLY (object); + + switch (property_id) + { + case PROP_N_COMPONENTS: + self->n_components = g_value_get_int (value); + break; + + case PROP_FACTOR: + self->factor = g_value_get_double (value); + break; + + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); + break; + } +} + +static void +gimp_operation_scalar_multiply_prepare (GeglOperation *operation) +{ + GimpOperationScalarMultiply *self = GIMP_OPERATION_SCALAR_MULTIPLY (operation); + const Babl *format; + + format = babl_format_n (babl_type ("float"), self->n_components); + + gegl_operation_set_format (operation, "input", format); + gegl_operation_set_format (operation, "output", format); +} + +static gboolean +gimp_operation_scalar_multiply_process (GeglOperation *operation, + void *in_buf, + void *out_buf, + glong samples, + const GeglRectangle *roi, + gint level) +{ + GimpOperationScalarMultiply *self = GIMP_OPERATION_SCALAR_MULTIPLY (operation); + gfloat *src = in_buf; + gfloat *dest = out_buf; + glong n_samples; + + n_samples = samples * self->n_components; + + while (n_samples--) + { + *dest = *src * self->factor; + + src++; + dest++; + } + + return TRUE; +} |