static gboolean
gimp_brightness_contrast_config_equal (GimpConfig *a,
GimpConfig *b)
{
GimpBrightnessContrastConfig *config_a = GIMP_BRIGHTNESS_CONTRAST_CONFIG (a);
GimpBrightnessContrastConfig *config_b = GIMP_BRIGHTNESS_CONTRAST_CONFIG (b);
if (config_a->brightness != config_b->brightness ||
config_a->contrast != config_b->contrast)
{
return FALSE;
}
return TRUE;
}
static void
brightness_contrast_config_notify (GObject *object,
GParamSpec *pspec,
GimpBrightnessContrastTool *bc_tool)
{
GimpBrightnessContrastConfig *config;
config = GIMP_BRIGHTNESS_CONTRAST_CONFIG (object);
if (! bc_tool->brightness_data)
return;
if (! strcmp (pspec->name, "brightness"))
{
gtk_adjustment_set_value (bc_tool->brightness_data,
config->brightness * 127.0);
}
else if (! strcmp (pspec->name, "contrast"))
{
gtk_adjustment_set_value (bc_tool->contrast_data,
config->contrast * 127.0);
}
gimp_image_map_tool_preview (GIMP_IMAGE_MAP_TOOL (bc_tool));
}
static void
brightness_contrast_to_levels_callback (GtkWidget *widget,
GimpImageMapTool *image_map_tool)
{
GimpLevelsConfig *levels;
levels = gimp_brightness_contrast_config_to_levels_config (GIMP_BRIGHTNESS_CONTRAST_CONFIG (image_map_tool->config));
gimp_image_map_tool_edit_as (image_map_tool,
"gimp-levels-tool",
GIMP_CONFIG (levels));
g_object_unref (levels);
}
static gboolean
gimp_operation_brightness_contrast_process (GeglOperation *operation,
void *in_buf,
void *out_buf,
glong samples,
const GeglRectangle *roi,
gint level)
{
GimpOperationPointFilter *point = GIMP_OPERATION_POINT_FILTER (operation);
GimpBrightnessContrastConfig *config = GIMP_BRIGHTNESS_CONTRAST_CONFIG (point->config);
gfloat *src = in_buf;
gfloat *dest = out_buf;
gdouble brightness;
gdouble slant;
if (! config)
return FALSE;
brightness = config->brightness / 2.0;
slant = tan ((config->contrast + 1) * G_PI_4);
while (samples--)
{
dest[RED] = gimp_operation_brightness_contrast_map (src[RED],
brightness,
slant);
dest[GREEN] = gimp_operation_brightness_contrast_map (src[GREEN],
brightness,
slant);
dest[BLUE] = gimp_operation_brightness_contrast_map (src[BLUE],
brightness,
slant);
dest[ALPHA] = src[ALPHA];
src += 4;
dest += 4;
}
return TRUE;
}
static void
gimp_brightness_contrast_config_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GimpBrightnessContrastConfig *self = GIMP_BRIGHTNESS_CONTRAST_CONFIG (object);
switch (property_id)
{
case PROP_BRIGHTNESS:
self->brightness = g_value_get_double (value);
break;
case PROP_CONTRAST:
self->contrast = g_value_get_double (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}