A SvgSurface provides a way to render Scalable Vector Graphics (SVG) images from cairo. More...

#include <cairomm/surface.h>

Inheritance diagram for Cairo::SvgSurface:

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

	~SvgSurface () override

void	restrict_to_version (SvgVersion version)
	Restricts the generated SVG file to the given version. 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< SvgSurface >	create (std::string filename, double width_in_points, double height_in_points)
	Creates a SvgSurface with a specified dimensions that will be saved as the given filename. More...

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

static const std::vector< SvgVersion >	get_versions ()
	Retrieves the list of SVG versions supported by cairo. More...

static std::string	version_to_string (SvgVersion version)
	Get the string representation of the given version 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 SvgSurface provides a way to render Scalable Vector Graphics (SVG) images from cairo.

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

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

Constructor & Destructor Documentation

◆ SvgSurface()

Cairo::SvgSurface::SvgSurface	(	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.

◆ ~SvgSurface()

Cairo::SvgSurface::~SvgSurface ( )

override

Member Function Documentation

◆ create()

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

static

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

Parameters

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

Examples: svg-surface.cc.

◆ create_for_stream()

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

static

Creates a SvgSurface 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 SVG document in points
height_in_points	The height of the SVG document in points

Since: 1.8

◆ get_versions()

static const std::vector< SvgVersion > Cairo::SvgSurface::get_versions ( )

static

Retrieves the list of SVG versions supported by cairo.

See restrict_to_version().

Since: 1.2

◆ restrict_to_version()

void Cairo::SvgSurface::restrict_to_version ( SvgVersion version )

Restricts the generated SVG file to the given version.

See get_versions() for a list of available version 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.

Since: 1.2

◆ version_to_string()

static std::string Cairo::SvgSurface::version_to_string ( SvgVersion version )

static

Get the string representation of the given version id.

The returned string will be empty if version isn't valid. See get_versions() for a way to get the list of valid version ids.

since: 1.2

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

◆ SvgSurface()

◆ ~SvgSurface()

Member Function Documentation

◆ create()

◆ create_for_stream()

◆ get_versions()

◆ restrict_to_version()

◆ version_to_string()