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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.
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
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).
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] |
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.
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.
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.
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.
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.
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.
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.
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.
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).
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.
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.
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.
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.
Since: 2.10
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.