Inkscape: Inkscape::Filters::FilterMerge Class Reference

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#include <nr-filter-merge.h>

Inheritance diagram for Inkscape::Filters::FilterMerge:

Public Member Functions
	FilterMerge ()

void	render_cairo (FilterSlot &) const override

bool	can_handle_affine (Geom::Affine const &) const override
	Indicate whether the filter primitive can handle the given affine.

double	complexity (Geom::Affine const &ctm) const override

bool	uses_background () const override

void	set_input (int input) override
	Sets the input slot number 'slot' to be used as input in rendering filter primitive 'primitive' For filter primitive types accepting more than one input, this sets the first input.

void	set_input (int input, int slot) override
	Sets the input slot number 'slot' to be user as input number 'input' in rendering filter primitive 'primitive' First input for a filter primitive is number 0.

Glib::ustring	name () const override

Public Member Functions inherited from Inkscape::Filters::FilterPrimitive
	FilterPrimitive ()

virtual	~FilterPrimitive ()

virtual void	update ()

virtual void	area_enlarge (Geom::IntRect &area, Geom::Affine const &m) const

virtual void	set_output (int slot)
	Sets the slot number 'slot' to be used as output from filter primitive 'primitive' If output slot for a filter element is not set, one of the unused image slots is used.

void	set_x (SVGLength const &length)
	Sets the filter primitive subregion.

void	set_y (SVGLength const &length)

void	set_width (SVGLength const &length)

void	set_height (SVGLength const &length)

void	set_subregion (SVGLength const &x, SVGLength const &y, SVGLength const &width, SVGLength const &height)

Geom::Rect	filter_primitive_area (FilterUnits const &units) const
	Returns the filter primitive area in user coordinate system.

void	setStyle (SPStyle const *style)
	Sets style for access to properties used by filter primitives.

Private Attributes
std::vector< int >	_input_image

Additional Inherited Members
Protected Attributes inherited from Inkscape::Filters::FilterPrimitive
int	_input

int	_output

SVGLength	_subregion_x

SVGLength	_subregion_y

SVGLength	_subregion_width

SVGLength	_subregion_height

SPColorInterpolation	color_interpolation

Detailed Description

Definition at line 22 of file nr-filter-merge.h.

Constructor & Destructor Documentation

◆ FilterMerge()

Inkscape::Filters::FilterMerge::FilterMerge ( )

Definition at line 22 of file nr-filter-merge.cpp.

References Inkscape::Filters::NR_FILTER_SLOT_NOT_SET.

Member Function Documentation

◆ can_handle_affine()

bool Inkscape::Filters::FilterMerge::can_handle_affine ( Geom::Affine const & ) const

overridevirtual

Indicate whether the filter primitive can handle the given affine.

Results of some filter primitives depend on the coordinate system used when rendering. A gaussian blur with equal x and y deviation will remain unchanged by rotations. Per-pixel filters like color matrix and blend will not change regardless of the transformation.

When any filter returns false, filter rendering is performed on an intermediate surface with edges parallel to the axes of the user coordinate system. This means the matrices from FilterUnits will contain at most a (possibly non-uniform) scale and a translation. When all primitives of the filter return true, the rendering is performed in display coordinate space and no intermediate surface is used.

Reimplemented from Inkscape::Filters::FilterPrimitive.

Definition at line 63 of file nr-filter-merge.cpp.

◆ complexity()

double Inkscape::Filters::FilterMerge::complexity ( Geom::Affine const & ctm ) const

overridevirtual

Reimplemented from Inkscape::Filters::FilterPrimitive.

Definition at line 69 of file nr-filter-merge.cpp.

◆ name()

Glib::ustring Inkscape::Filters::FilterMerge::name ( ) const

inlineoverridevirtual

Reimplemented from Inkscape::Filters::FilterPrimitive.

Definition at line 35 of file nr-filter-merge.h.

◆ render_cairo()

void Inkscape::Filters::FilterMerge::render_cairo ( FilterSlot & slot ) const

overridevirtual

Reimplemented from Inkscape::Filters::FilterPrimitive.

Definition at line 25 of file nr-filter-merge.cpp.

References _input_image, Inkscape::Filters::FilterPrimitive::_output, Inkscape::Filters::FilterPrimitive::color_interpolation, Inkscape::Filters::FilterPrimitive::filter_primitive_area(), Inkscape::Filters::FilterSlot::get_units(), Inkscape::Filters::FilterSlot::getcairo(), ink_cairo_surface_create_identical(), Inkscape::Filters::FilterSlot::set(), set_cairo_surface_ci(), and Inkscape::Filters::FilterSlot::set_primitive_area().

◆ set_input() [1/2]

void Inkscape::Filters::FilterMerge::set_input ( int slot )

overridevirtual

Sets the input slot number 'slot' to be used as input in rendering filter primitive 'primitive' For filter primitive types accepting more than one input, this sets the first input.

If any of the required input slots is not set, the output of previous filter primitive is used, or SourceGraphic if this is the first primitive for this filter.

Reimplemented from Inkscape::Filters::FilterPrimitive.

Definition at line 84 of file nr-filter-merge.cpp.

References _input_image.

◆ set_input() [2/2]

void Inkscape::Filters::FilterMerge::set_input	(	int	input,
		int	slot
	)

overridevirtual

Sets the input slot number 'slot' to be user as input number 'input' in rendering filter primitive 'primitive' First input for a filter primitive is number 0.

For primitives with attributes 'in' and 'in2', these are numbered 0 and 1, respectively. If any of required input slots for a filter is not set, the output of previous filter primitive is used, or SourceGraphic if this is the first filter primitive for this filter.

Reimplemented from Inkscape::Filters::FilterPrimitive.

Definition at line 89 of file nr-filter-merge.cpp.

References _input_image, and Inkscape::Filters::NR_FILTER_SLOT_NOT_SET.