A PsSurface provides a way to render PostScript documents from cairo. More...

#include <cairomm/surface.h>

Inheritance diagram for Cairo::PsSurface:

Public Member Functions
	PsSurface (cairo_surface_t *cobject, bool has_reference=false)
	Create a C++ wrapper for the C instance. More...

	~PsSurface () override

void	set_size (double width_in_points, double height_in_points)
	Changes the size of a PostScript surface for the current (and subsequent) pages. More...

void	dsc_comment (std::string comment)
	Emit a comment into the PostScript output for the given surface. More...

void	dsc_begin_setup ()
	This function indicates that subsequent calls to dsc_comment() should direct comments to the Setup section of the PostScript output. More...

void	dsc_begin_page_setup ()
	This function indicates that subsequent calls to dsc_comment() should direct comments to the PageSetup section of the PostScript output. More...

void	set_eps (bool eps)
	If eps is true, the PostScript surface will output Encapsulated PostScript. More...

bool	get_eps () const
	Check whether the PostScript surface will output Encapsulated PostScript. More...

void	restrict_to_level (PsLevel level)
	Restricts the generated PostSript file to @level. More...

Public Member Functions inherited from Cairo::Surface
	Surface (cairo_surface_t *cobject, bool has_reference=false)
	Create a C++ wrapper for the C instance. More...

	Surface (const Surface &)=delete

Surface &	operator= (const Surface &)=delete

virtual	~Surface ()

const unsigned char *	get_mime_data (const std::string & mime_type, unsigned long & length)
	Return mime data previously attached to surface using the specified mime type. More...

void	set_mime_data (const std::string & mime_type, unsigned char *data, unsigned long length, const SlotDestroy & slot_destroy)
	Attach an image in the format mime_type to surface. More...

void	unset_mime_data (const std::string & mime_type)
	Remove the data from a surface. More...

void	get_font_options (FontOptions & options) const
	Retrieves the default font rendering options for the surface. More...

void	finish ()
	This function finishes the surface and drops all references to external resources. More...

void	flush ()
	Do any pending drawing for the surface and also restore any temporary modifications cairo has made to the surface's state. More...

void	mark_dirty ()
	Tells cairo to consider the data buffer dirty. More...

void	mark_dirty (int x, int y, int width, int height)
	Marks a rectangular area of the given surface dirty. More...

void	set_device_offset (double x_offset, double y_offset)
	Sets an offset that is added to the device coordinates determined by the CTM when drawing to surface. More...

void	get_device_offset (double & x_offset, double & y_offset) const
	Returns a previous device offset set by set_device_offset(). More...

void	set_device_scale (double x_scale, double y_scale)
	Sets a scale that is multiplied to the device coordinates determined by the CTM when drawing to surface. More...

void	set_device_scale (double scale)
	Sets x and y scale to the same value. More...

void	get_device_scale (double & x_scale, double & y_scale) const
	Returns a previous device scale set by set_device_scale(). More...

double	get_device_scale () const
	Returns the x and y average of a previous device scale set by set_device_scale(). More...

void	set_fallback_resolution (double x_pixels_per_inch, double y_pixels_per_inch)
	Set the horizontal and vertical resolution for image fallbacks. More...

void	get_fallback_resolution (double & x_pixels_per_inch, double & y_pixels_per_inch) const
	This function returns the previous fallback resolution set by set_fallback_resolution(), or default fallback resolution if never set. More...

Type	get_type () const

Content	get_content () const
	This function returns the content type of surface which indicates whether the surface contains color and/or alpha information. More...

void	copy_page ()
	Emits the current page for backends that support multiple pages, but doesn't clear it, so that the contents of the current page will be retained for the next page. More...

void	show_page ()
	Emits and clears the current page for backends that support multiple pages. More...

bool	has_show_text_glyphs () const
	Returns whether the surface supports sophisticated Context::show_text_glyphs() operations. More...

void	write_to_png (const std::string & filename)
	Writes the contents of surface to a new file filename as a PNG image. More...

void	write_to_png_stream (const SlotWriteFunc & write_func)
	Writes the Surface to the write function. More...

RefPtr< Device >	get_device ()
	This function returns the device for a surface. More...

cobject *	cobj ()
	Provides acces to the underlying C cairo surface. More...

const cobject *	cobj () const
	Provides acces to the underlying C cairo surface. More...

Static Public Member Functions
static RefPtr< PsSurface >	create (std::string filename, double width_in_points, double height_in_points)
	Creates a PsSurface with a specified dimensions that will be saved as the given filename. More...

static RefPtr< PsSurface >	create_for_stream (const SlotWriteFunc & write_func, double width_in_points, double height_in_points)
	Creates a PsSurface with a specified dimensions that will be written to the given write function instead of saved directly to disk. More...

static const std::vector< PsLevel >	get_levels ()
	Used to retrieve the list of supported levels. More...

static std::string	level_to_string (PsLevel level)
	Get the string representation of the given level id. More...

Static Public Member Functions inherited from Cairo::Surface
static RefPtr< Surface >	create (const RefPtr< Surface > other, Content content, int width, int height)
	Create a new surface that is as compatible as possible with an existing surface. More...

static RefPtr< Surface >	create (const RefPtr< Surface > & target, double x, double y, double width, double height)
	Create a new surface that is a rectangle within the target surface. More...

Additional Inherited Members
Public Types inherited from Cairo::Surface
enum class	Type { IMAGE = CAIRO_SURFACE_TYPE_IMAGE , PDF = CAIRO_SURFACE_TYPE_PDF , PS = CAIRO_SURFACE_TYPE_PS , XLIB = CAIRO_SURFACE_TYPE_XLIB , XCB = CAIRO_SURFACE_TYPE_XCB , GLITZ = CAIRO_SURFACE_TYPE_GLITZ , QUARTZ = CAIRO_SURFACE_TYPE_QUARTZ , WIN32 = CAIRO_SURFACE_TYPE_WIN32 , WIN32_SURFACE = CAIRO_SURFACE_TYPE_WIN32 , BEOS = CAIRO_SURFACE_TYPE_BEOS , DIRECTFB = CAIRO_SURFACE_TYPE_DIRECTFB , SVG = CAIRO_SURFACE_TYPE_SVG , OS2 = CAIRO_SURFACE_TYPE_OS2 , WIN32_PRINTING = CAIRO_SURFACE_TYPE_WIN32_PRINTING , QUARTZ_IMAGE = CAIRO_SURFACE_TYPE_QUARTZ_IMAGE , SCRIPT = CAIRO_SURFACE_TYPE_SCRIPT , QT = CAIRO_SURFACE_TYPE_QT , RECORDING = CAIRO_SURFACE_TYPE_RECORDING , VG = CAIRO_SURFACE_TYPE_VG , GL = CAIRO_SURFACE_TYPE_GL , DRM = CAIRO_SURFACE_TYPE_DRM , TEE = CAIRO_SURFACE_TYPE_TEE , XML = CAIRO_SURFACE_TYPE_XML , SKIA = CAIRO_SURFACE_TYPE_SKIA , SUBSURFACE = CAIRO_SURFACE_TYPE_SUBSURFACE }
	Cairo::Surface::Type is used to describe the type of a given surface. More...

enum class	Format { ARGB32 = CAIRO_FORMAT_ARGB32 , RGB24 = CAIRO_FORMAT_RGB24 , A8 = CAIRO_FORMAT_A8 , A1 = CAIRO_FORMAT_A1 , RGB16_565 = CAIRO_FORMAT_RGB16_565 }
	Format is used to identify the memory format of image data. More...

typedef sigc::slot< ErrorStatus(const unsigned char *, unsigned int)>	SlotWriteFunc
	For example: `ErrorStatus my_write_func(unsigned char* data, unsigned int length);` More...

typedef sigc::slot< ErrorStatus(unsigned char *, unsigned int)>	SlotReadFunc
	This is the type of function which is called when a backend needs to read data from an input stream. More...

typedef sigc::slot< void()>	SlotDestroy
	For instance, void on_destroy();. More...

typedef cairo_surface_t	cobject
	The underlying C cairo surface type. More...

Protected Attributes inherited from Cairo::Surface
cobject *	m_cobject
	The underlying C cairo surface type that is wrapped by this Surface. More...

Detailed Description

A PsSurface provides a way to render PostScript documents from cairo.

This surface is not rendered to the screen but instead renders the drawing to a PostScript file on disk.

Note: For this Surface to be available, cairo must have been compiled with PostScript support

Constructor & Destructor Documentation

◆ PsSurface()

Cairo::PsSurface::PsSurface	(	cairo_surface_t *	cobject,
		bool	has_reference = `false`
	)

explicit

Create a C++ wrapper for the C instance.

This C++ instance should then be given to a RefPtr.

Parameters

cobject	The C instance.
has_reference	whether we already have a reference. Otherwise, the constructor will take an extra reference.

◆ ~PsSurface()

Cairo::PsSurface::~PsSurface ( )

override

Member Function Documentation

◆ create()

static RefPtr<PsSurface> Cairo::PsSurface::create	(	std::string	filename,
		double	width_in_points,
		double	height_in_points
	)

static

Creates a PsSurface with a specified dimensions that will be saved as the given filename.

Parameters

filename	The name of the PostScript file to save the surface to
width_in_points	The width of the PostScript document in points
height_in_points	The height of the PostScript document in points

Examples: ps-surface.cc.

◆ create_for_stream()

static RefPtr<PsSurface> Cairo::PsSurface::create_for_stream	(	const SlotWriteFunc &	write_func,
		double	width_in_points,
		double	height_in_points
	)

static

Creates a PsSurface with a specified dimensions that will be written to the given write function instead of saved directly to disk.

Parameters

write_func	The function to be called when the backend needs to write data to an output stream
width_in_points	The width of the PostScript document in points
height_in_points	The height of the PostScript document in points

Since: 1.8

◆ dsc_begin_page_setup()

void Cairo::PsSurface::dsc_begin_page_setup ( )

This function indicates that subsequent calls to dsc_comment() should direct comments to the PageSetup section of the PostScript output.

This function call is only needed for the first page of a surface. It should be called after any call to dsc_begin_setup() and before any drawing is performed to the surface.

◆ dsc_begin_setup()

void Cairo::PsSurface::dsc_begin_setup ( )

This function indicates that subsequent calls to dsc_comment() should direct comments to the Setup section of the PostScript output.

This function should be called at most once per surface, and must be called before any call to dsc_begin_page_setup() and before any drawing is performed to the surface.

◆ dsc_comment()

void Cairo::PsSurface::dsc_comment ( std::string comment )

Emit a comment into the PostScript output for the given surface.

See the cairo reference documentation for more information.

Parameters

comment a comment string to be emitted into the PostScript output

◆ get_eps()

bool Cairo::PsSurface::get_eps ( ) const

Check whether the PostScript surface will output Encapsulated PostScript.

Since: 1.8

◆ get_levels()

static const std::vector<PsLevel> Cairo::PsSurface::get_levels ( )

static

Used to retrieve the list of supported levels.

See restrict_to_level().

Since: 1.6

◆ level_to_string()

static std::string Cairo::PsSurface::level_to_string ( PsLevel level )

static

Get the string representation of the given level id.

This function will return an empty string if level id isn't valid. See get_levels() for a way to get the list of valid level ids.

Returns: the string associated to given level.

Parameters

level a level id

Since: 1.6

◆ restrict_to_level()

void Cairo::PsSurface::restrict_to_level ( PsLevel level )

Restricts the generated PostSript file to @level.

See get_levels() for a list of available level values that can be used here.

This function should only be called before any drawing operations have been performed on the given surface. The simplest way to do this is to call this function immediately after creating the surface.

Parameters

level PostScript level

Since: 1.6

◆ set_eps()

void Cairo::PsSurface::set_eps ( bool eps )

If eps is true, the PostScript surface will output Encapsulated PostScript.

This function should only be called before any drawing operations have been performed on the current page. The simplest way to do this is to call this function immediately after creating the surface. An Encapsulated Postscript file should never contain more than one page.

Since: 1.6

◆ set_size()

void Cairo::PsSurface::set_size	(	double	width_in_points,
		double	height_in_points
	)

Changes the size of a PostScript surface for the current (and subsequent) pages.

This function should only be called before any drawing operations have been performed on the current page. The simplest way to do this is to call this function immediately after creating the surface or immediately after completing a page with either Context::show_page() or Context::copy_page().

Parameters

width_in_points	new surface width, in points (1 point == 1/72.0 inch)
height_in_points	new surface height, in points (1 point == 1/72.0 inch)

The documentation for this class was generated from the following file:

cairomm/surface.h

Public Member Functions

Static Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ PsSurface()

◆ ~PsSurface()

Member Function Documentation

◆ create()

◆ create_for_stream()

◆ dsc_begin_page_setup()

◆ dsc_begin_setup()

◆ dsc_comment()

◆ get_eps()

◆ get_levels()

◆ level_to_string()

◆ restrict_to_level()

◆ set_eps()

◆ set_size()