---
name: "cucul_frame"
section: "3caca"
platform: "linux"
package: "libcucul-dev"
version: "0.99.beta14-1"
release: "Debian 5.0 (Lenny)"
platforms: ["linux"]
url: "https://new.carta.tech/cucul_frame"
---

# cucul\_frame(3caca)

## NAME

libcucul canvas frame handling -

### Functions

\_\_extern int **cucul\_get\_frame\_count** (**cucul\_canvas\_t** const \*)\
 *Get the number of frames in a canvas.*  \_\_extern int **cucul\_set\_frame** (**cucul\_canvas\_t** \*, int)\
 *Activate a given canvas frame.*  \_\_extern char const \* **cucul\_get\_frame\_name** (**cucul\_canvas\_t** const \*)\
 *Get the current frame's name.*  \_\_extern int **cucul\_set\_frame\_name** (**cucul\_canvas\_t** \*, char const \*)\
 *Set the current frame's name.*  \_\_extern int **cucul\_create\_frame** (**cucul\_canvas\_t** \*, int)\
 *Add a frame to a canvas.*  \_\_extern int **cucul\_free\_frame** (**cucul\_canvas\_t** \*, int)\
 *Remove a frame from a canvas.*

## Detailed Description

These functions provide high level routines for canvas frame insertion, removal, copying etc.

## Function Documentation

### \_\_extern int cucul\_get\_frame\_count (cucul\_canvas\_t const \* cv)

Return the current canvas' frame count.

This function never fails.

**Parameters:**

*cv* A libcucul canvas

**Returns:**

The frame count

Referenced by cucul\_set\_canvas\_boundaries().

### \_\_extern int cucul\_set\_frame (cucul\_canvas\_t \* cv, int id)

Set the active canvas frame. All subsequent drawing operations will be performed on that frame. The current painting context set by **cucul\_set\_attr()** is inherited.

If the frame index is outside the canvas' frame range, nothing happens.

If an error occurs, -1 is returned and **errno** is set accordingly:

- •

  `EINVAL` Requested frame is out of range.

**Parameters:**

*cv* A libcucul canvas \
 *id* The canvas frame to activate

**Returns:**

0 in case of success, -1 if an error occurred.

Referenced by cucul\_set\_canvas\_boundaries().

### \_\_extern char const\* cucul\_get\_frame\_name (cucul\_canvas\_t const \* cv)

Return the current frame's name. The returned string is valid until the frame is deleted or **cucul\_set\_frame\_name()** is called to change the frame name again.

This function never fails.

**Parameters:**

*cv* A libcucul canvas.

**Returns:**

The current frame's name.

### \_\_extern int cucul\_set\_frame\_name (cucul\_canvas\_t \* cv, char const \* name)

Set the current frame's name. Upon creation, a frame has a default name of `'frame#xxxxxxxx'` where `xxxxxxxx` is a self-incrementing hexadecimal number.

If an error occurs, -1 is returned and **errno** is set accordingly:

- •

  `ENOMEM` Not enough memory to allocate new frame.

**Parameters:**

*cv* A libcucul canvas. \
 *name* The name to give to the current frame.

**Returns:**

0 in case of success, -1 if an error occurred.

### \_\_extern int cucul\_create\_frame (cucul\_canvas\_t \* cv, int id)

Create a new frame within the given canvas. Its contents and attributes are copied from the currently active frame.

The frame index indicates where the frame should be inserted. Valid values range from 0 to the current canvas frame count. If the frame index is greater than or equals the current canvas frame count, the new frame is appended at the end of the canvas. If the frame index is less than zero, the new frame is inserted at index 0.

The active frame does not change, but its index may be renumbered due to the insertion.

If an error occurs, -1 is returned and **errno** is set accordingly:

- •

  `ENOMEM` Not enough memory to allocate new frame.

**Parameters:**

*cv* A libcucul canvas \
 *id* The index where to insert the new frame

**Returns:**

0 in case of success, -1 if an error occurred.

Referenced by cucul\_set\_canvas\_boundaries().

### \_\_extern int cucul\_free\_frame (cucul\_canvas\_t \* cv, int id)

Delete a frame from a given canvas.

The frame index indicates the frame to delete. Valid values range from 0 to the current canvas frame count minus 1. If the frame index is greater than or equals the current canvas frame count, the last frame is deleted.

If the active frame is deleted, frame 0 becomes the new active frame. Otherwise, the active frame does not change, but its index may be renumbered due to the deletion.

If an error occurs, -1 is returned and **errno** is set accordingly:

- •

  `EINVAL` Requested frame is out of range, or attempt to delete the last frame of the canvas.

**Parameters:**

*cv* A libcucul canvas \
 *id* The index of the frame to delete

**Returns:**

0 in case of success, -1 if an error occurred.