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Script Surfaces

Script Surfaces — Rendering to replayable scripts

Types and Values

Description

The script surface provides the ability to render to a native script that matches the cairo drawing model. The scripts can be replayed using tools under the util/cairo-script directory, or with cairo-perf-trace.

Functions

cairo_script_create ()

cairo_device_t *
cairo_script_create (const char *filename);

Creates a output device for emitting the script, used when creating the individual surfaces.

Parameters

filename

the name (path) of the file to write the script to

 

Returns

a pointer to the newly created device. The caller owns the surface and should call cairo_device_destroy() when done with it.

This function always returns a valid pointer, but it will return a pointer to a "nil" device if an error such as out of memory occurs. You can use cairo_device_status() to check for this.

Since: 1.12


cairo_script_create_for_stream ()

cairo_device_t *
cairo_script_create_for_stream (cairo_write_func_t write_func,
                                void *closure);

Creates a output device for emitting the script, used when creating the individual surfaces.

Parameters

write_func

callback function passed the bytes written to the script

 

closure

user data to be passed to the callback

 

Returns

a pointer to the newly created device. The caller owns the surface and should call cairo_device_destroy() when done with it.

This function always returns a valid pointer, but it will return a pointer to a "nil" device if an error such as out of memory occurs. You can use cairo_device_status() to check for this.

Since: 1.12


cairo_script_from_recording_surface ()

cairo_status_t
cairo_script_from_recording_surface (cairo_device_t *script,
                                     cairo_surface_t *recording_surface);

Converts the record operations in recording_surface into a script.

Parameters

script

the script (output device)

 

recording_surface

the recording surface to replay

 

Returns

CAIRO_STATUS_SUCCESS on successful completion or an error code.

Since: 1.12


cairo_script_get_mode ()

cairo_script_mode_t
cairo_script_get_mode (cairo_device_t *script);

Queries the script for its current output mode.

Parameters

script

The script (output device) to query

 

Returns

the current output mode of the script

Since: 1.12


cairo_script_set_mode ()

void
cairo_script_set_mode (cairo_device_t *script,
                       cairo_script_mode_t mode);

Change the output mode of the script

Parameters

script

The script (output device)

 

mode

the new mode

 

Since: 1.12


cairo_script_surface_create ()

cairo_surface_t *
cairo_script_surface_create (cairo_device_t *script,
                             cairo_content_t content,
                             double width,
                             double height);

Create a new surface that will emit its rendering through script

Parameters

script

the script (output device)

 

content

the content of the surface

 

width

width in pixels

 

height

height in pixels

 

Returns

a pointer to the newly created surface. The caller owns the surface and should call cairo_surface_destroy() when done with it.

This function always returns a valid pointer, but it will return a pointer to a "nil" surface if an error such as out of memory occurs. You can use cairo_surface_status() to check for this.

Since: 1.12


cairo_script_surface_create_for_target ()

cairo_surface_t *
cairo_script_surface_create_for_target
                               (cairo_device_t *script,
                                cairo_surface_t *target);

Create a pxoy surface that will render to target and record the operations to device .

Parameters

script

the script (output device)

 

target

a target surface to wrap

 

Returns

a pointer to the newly created surface. The caller owns the surface and should call cairo_surface_destroy() when done with it.

This function always returns a valid pointer, but it will return a pointer to a "nil" surface if an error such as out of memory occurs. You can use cairo_surface_status() to check for this.

Since: 1.12


cairo_script_write_comment ()

void
cairo_script_write_comment (cairo_device_t *script,
                            const char *comment,
                            int len);

Emit a string verbatim into the script.

Parameters

script

the script (output device)

 

comment

the string to emit

 

len

the length of the sting to write, or -1 to use strlen()

 

Since: 1.12

Types and Values

CAIRO_HAS_SCRIPT_SURFACE

#define CAIRO_HAS_SCRIPT_SURFACE 1

Defined if the script surface backend is available. The script surface backend is always built in since 1.12.

Since: 1.12


enum cairo_script_mode_t

A set of script output variants.

Members

CAIRO_SCRIPT_MODE_ASCII

the output will be in readable text (default). (Since 1.12)

 

CAIRO_SCRIPT_MODE_BINARY

the output will use byte codes. (Since 1.12)

 

Since: 1.12

See Also

cairo_surface_t

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