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Cairo: A Vector Graphics Library | |
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| Top | Description | ||||
#define CAIRO_HAS_SVG_SURFACE cairo_surface_t * cairo_svg_surface_create (const char *filename,double width_in_points,double height_in_points); cairo_surface_t * cairo_svg_surface_create_for_stream (cairo_write_func_t write_func,void *closure,double width_in_points,double height_in_points); void cairo_svg_surface_restrict_to_version (cairo_surface_t *surface,cairo_svg_version_t version); enum cairo_svg_version_t; void cairo_svg_get_versions (cairo_svg_version_t const **versions,int *num_versions); const char * cairo_svg_version_to_string (cairo_svg_version_t version);
The SVG surface is used to render cairo graphics to SVG files and is a multi-page vector surface backend.
#define CAIRO_HAS_SVG_SURFACE 1
Defined if the SVG surface backend is available. This macro can be used to conditionally compile backend-specific code.
cairo_surface_t * cairo_svg_surface_create (const char *filename,double width_in_points,double height_in_points);
Creates a SVG surface of the specified size in points to be written
to filename.
The SVG surface backend recognizes the following MIME types for the
data attached to a surface (see cairo_surface_set_mime_data()) when
it is used as a source pattern for drawing on this surface:
CAIRO_MIME_TYPE_JPEG, CAIRO_MIME_TYPE_PNG,
CAIRO_MIME_TYPE_URI. If any of them is specified, the SVG backend
emits a href with the content of MIME data instead of a surface
snapshot (PNG, Base64-encoded) in the corresponding image tag.
The unofficial MIME type CAIRO_MIME_TYPE_URI is examined
first. If present, the URI is emitted as is: assuring the
correctness of URI is left to the client code.
If CAIRO_MIME_TYPE_URI is not present, but CAIRO_MIME_TYPE_JPEG
or CAIRO_MIME_TYPE_PNG is specified, the corresponding data is
Base64-encoded and emitted.
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a filename for the SVG output (must be writable), NULL may be
used to specify no output. This will generate a SVG surface that
may be queried and used as a source, without generating a
temporary file.
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width of the surface, in points (1 point == 1/72.0 inch) |
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height of the surface, in points (1 point == 1/72.0 inch) |
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.
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Since 1.2
cairo_surface_t * cairo_svg_surface_create_for_stream (cairo_write_func_t write_func,void *closure,double width_in_points,double height_in_points);
Creates a SVG surface of the specified size in points to be written
incrementally to the stream represented by write_func and closure.
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a cairo_write_func_t to accept the output data, may be NULL
to indicate a no-op write_func. With a no-op write_func,
the surface may be queried or used as a source without
generating any temporary files.
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the closure argument for write_func
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width of the surface, in points (1 point == 1/72.0 inch) |
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height of the surface, in points (1 point == 1/72.0 inch) |
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.
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Since 1.2
void cairo_svg_surface_restrict_to_version (cairo_surface_t *surface,cairo_svg_version_t version);
Restricts the generated SVG file to version. See cairo_svg_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.
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a SVG cairo_surface_t |
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SVG version |
Since 1.2
typedef enum _cairo_svg_version {
CAIRO_SVG_VERSION_1_1,
CAIRO_SVG_VERSION_1_2
} cairo_svg_version_t;
cairo_svg_version_t is used to describe the version number of the SVG specification that a generated SVG file will conform to.
void cairo_svg_get_versions (cairo_svg_version_t const **versions,int *num_versions);
Used to retrieve the list of supported versions. See
cairo_svg_surface_restrict_to_version().
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supported version list |
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list length |
Since 1.2
const char * cairo_svg_version_to_string (cairo_svg_version_t version);
Get the string representation of the given version id. This function
will return NULL if version isn't valid. See cairo_svg_get_versions()
for a way to get the list of valid version ids.
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a version id |
Returns : |
the string associated to given version. |
Since 1.2