static void
gimp_desaturate_tool_config_notify (GObject *object,
GParamSpec *pspec,
GimpDesaturateTool *desaturate_tool)
{
GimpDesaturateConfig *config = GIMP_DESATURATE_CONFIG (object);
if (! desaturate_tool->button)
return;
gimp_int_radio_group_set_active (GTK_RADIO_BUTTON (desaturate_tool->button),
config->mode);
gimp_image_map_tool_preview (GIMP_IMAGE_MAP_TOOL (desaturate_tool));
}
static void
gimp_desaturate_config_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GimpDesaturateConfig *self = GIMP_DESATURATE_CONFIG (object);
switch (property_id)
{
case PROP_MODE:
self->mode = g_value_get_enum (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static gboolean
gimp_operation_desaturate_process (GeglOperation *operation,
void *in_buf,
void *out_buf,
glong samples,
const GeglRectangle *roi,
gint level)
{
GimpOperationPointFilter *point = GIMP_OPERATION_POINT_FILTER (operation);
GimpDesaturateConfig *config = GIMP_DESATURATE_CONFIG (point->config);
gfloat *src = in_buf;
gfloat *dest = out_buf;
if (! config)
return FALSE;
switch (config->mode)
{
case GIMP_DESATURATE_LIGHTNESS:
while (samples--)
{
gfloat min, max, value;
max = MAX (src[0], src[1]);
max = MAX (max, src[2]);
min = MIN (src[0], src[1]);
min = MIN (min, src[2]);
value = (max + min) / 2;
dest[0] = value;
dest[1] = value;
dest[2] = value;
dest[3] = src[3];
src += 4;
dest += 4;
}
break;
case GIMP_DESATURATE_LUMINOSITY:
while (samples--)
{
gfloat value = GIMP_RGB_LUMINANCE (src[0], src[1], src[2]);
dest[0] = value;
dest[1] = value;
dest[2] = value;
dest[3] = src[3];
src += 4;
dest += 4;
}
break;
case GIMP_DESATURATE_AVERAGE:
while (samples--)
{
gfloat value = (src[0] + src[1] + src[2]) / 3;
dest[0] = value;
dest[1] = value;
dest[2] = value;
dest[3] = src[3];
src += 4;
dest += 4;
}
break;
}
return TRUE;
}
