gimpselection

gimpselection — Functions for manipulating selections.

Functions

Object Hierarchy

    GObject
    ╰── GimpItem
        ╰── GimpDrawable
            ╰── GimpChannel
                ╰── GimpSelection

Description

Functions for manipulating selections.

Functions

gimp_selection_get_by_id ()

GimpSelection *
gimp_selection_get_by_id (gint32 selection_id);

Returns a GimpSelection representing selection_id . This function calls gimp_item_get_by_id() and returns the item if it is selection or NULL otherwise.

Parameters

selection_id

The selection id.

 

Returns

a GimpSelection for selection_id or NULL if selection_id does not represent a valid selection. The object belongs to libgimp and you must not modify or unref it.

[nullable][transfer none]

Since: 3.0


gimp_selection_bounds ()

gboolean
gimp_selection_bounds (GimpImage *image,
                       gboolean *non_empty,
                       gint *x1,
                       gint *y1,
                       gint *x2,
                       gint *y2);

Find the bounding box of the current selection.

This procedure returns whether there is a selection for the specified image. If there is one, the upper left and lower right corners of the bounding box are returned. These coordinates are relative to the image. Please note that the pixel specified by the lower right coordinate of the bounding box is not part of the selection. The selection ends at the upper left corner of this pixel. This means the width of the selection can be calculated as (x2 - x1), its height as (y2 - y1).

Parameters

image

The image.

 

non_empty

TRUE if there is a selection.

[out]

x1

x coordinate of upper left corner of selection bounds.

[out]

y1

y coordinate of upper left corner of selection bounds.

[out]

x2

x coordinate of lower right corner of selection bounds.

[out]

y2

y coordinate of lower right corner of selection bounds.

[out]

Returns

TRUE on success.


gimp_selection_all ()

gboolean
gimp_selection_all (GimpImage *image);

Select all of the image.

This procedure sets the selection mask to completely encompass the image. Every pixel in the selection channel is set to 255.

Parameters

image

The image.

 

Returns

TRUE on success.


gimp_selection_none ()

gboolean
gimp_selection_none (GimpImage *image);

Deselect the entire image.

This procedure deselects the entire image. Every pixel in the selection channel is set to 0.

Parameters

image

The image.

 

Returns

TRUE on success.


gimp_selection_is_empty ()

gboolean
gimp_selection_is_empty (GimpImage *image);

Determine whether the selection is empty.

This procedure returns TRUE if the selection for the specified image is empty.

Parameters

image

The image.

 

Returns

Is the selection empty?


gimp_selection_float ()

GimpLayer *
gimp_selection_float (GimpImage *image,
                      gint n_drawables,
                      GimpDrawable **drawables,
                      gint offx,
                      gint offy);

Float the selection from the specified drawable with initial offsets as specified.

This procedure determines the region of the specified drawable that lies beneath the current selection. The region is then cut from the drawable and the resulting data is made into a new layer which is instantiated as a floating selection. The offsets allow initial positioning of the new floating selection.

Parameters

image

ignored

 

n_drawables

Size of drawables .

 

drawables

The drawables from which to float selection.

[array length=n_drawables]

offx

x offset for translation.

 

offy

y offset for translation.

 

Returns

The floated layer.

[transfer none]


gimp_selection_save ()

GimpChannel *
gimp_selection_save (GimpImage *image);

Copy the selection mask to a new channel.

This procedure copies the selection mask and stores the content in a new channel. The new channel is automatically inserted into the image's list of channels.

Parameters

image

The image.

 

Returns

The new channel.

[transfer none]


gimp_selection_value ()

gint
gimp_selection_value (GimpImage *image,
                      gint x,
                      gint y);

Find the value of the selection at the specified coordinates.

This procedure returns the value of the selection at the specified coordinates. If the coordinates lie out of bounds, 0 is returned.

Parameters

image

The image.

 

x

x coordinate of value.

 

y

y coordinate of value.

 

Returns

Value of the selection.


gimp_selection_grow ()

gboolean
gimp_selection_grow (GimpImage *image,
                     gint steps);

Grow the image's selection

This procedure grows the selection. Growing involves expanding the boundary in all directions by the specified pixel amount.

Parameters

image

The image.

 

steps

Steps of grow (in pixels).

 

Returns

TRUE on success.


gimp_selection_shrink ()

gboolean
gimp_selection_shrink (GimpImage *image,
                       gint steps);

Shrink the image's selection

This procedure shrinks the selection. Shrinking involves trimming the existing selection boundary on all sides by the specified number of pixels.

Parameters

image

The image.

 

steps

Steps of shrink (in pixels).

 

Returns

TRUE on success.


gimp_selection_invert ()

gboolean
gimp_selection_invert (GimpImage *image);

Invert the selection mask.

This procedure inverts the selection mask. For every pixel in the selection channel, its new value is calculated as (255 - old-value).

Parameters

image

The image.

 

Returns

TRUE on success.


gimp_selection_feather ()

gboolean
gimp_selection_feather (GimpImage *image,
                        gdouble radius);

Feather the image's selection

This procedure feathers the selection. Feathering is implemented using a gaussian blur.

Parameters

image

The image.

 

radius

Radius of feather (in pixels).

 

Returns

TRUE on success.


gimp_selection_sharpen ()

gboolean
gimp_selection_sharpen (GimpImage *image);

Sharpen the selection mask.

This procedure sharpens the selection mask. For every pixel in the selection channel, if the value is > 127, the new pixel is assigned a value of 255. This removes any \"anti-aliasing\" that might exist in the selection mask's boundary.

Parameters

image

The image.

 

Returns

TRUE on success.


gimp_selection_border ()

gboolean
gimp_selection_border (GimpImage *image,
                       gint radius);

Border the image's selection

This procedure borders the selection. Bordering creates a new selection which is defined along the boundary of the previous selection at every point within the specified radius.

Parameters

image

The image.

 

radius

Radius of border (in pixels).

 

Returns

TRUE on success.


gimp_selection_flood ()

gboolean
gimp_selection_flood (GimpImage *image);

Remove holes from the image's selection

This procedure removes holes from the selection, that can come from selecting a patchy area with the Fuzzy Select Tool. In technical terms this procedure floods the selection. See the Algorithms page in the developer wiki for details.

Parameters

image

The image.

 

Returns

TRUE on success.

Since: 2.10


gimp_selection_translate ()

gboolean
gimp_selection_translate (GimpImage *image,
                          gint offx,
                          gint offy);

Translate the selection by the specified offsets.

This procedure actually translates the selection for the specified image by the specified offsets. Regions that are translated from beyond the bounds of the image are set to empty. Valid regions of the selection which are translated beyond the bounds of the image because of this call are lost.

Parameters

image

The image.

 

offx

x offset for translation.

 

offy

y offset for translation.

 

Returns

TRUE on success.

Types and Values