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4D v14

SVG_Filter_Offset


SVG_Filter_Offset ( filterRef ; dx {; dy {; input {; name}}} ) -> Function result

Parameter	Type	Description
filterRef	SVG_Ref	Reference of filter
dx	Longint	Offset on X axis
dy	Longint	Offset on Y axis
input	String	Source of filter primitive
name	String	Target of filter primitive
Function result	SVG_Ref	Reference of primitive

Description

The SVG_Filter_Offset command sets an offset for the filterRef filter and returns its reference. If filterRef is not a filter reference, an error is generated.

The dx parameter is the value of the horizontal offset.

The optional dy parameter is the value of the vertical offset.

The optional input parameter identifies the graphic source of the filter primitive. You can pass:

either "sourceGraphic", indicating that the graphic is the filter source (default),
or "sourceAlpha", which indicates that the alpha channel is the filter source.

The optional name is the name, if any, assigned to the result of this filter primitive.

Note: Under Windows, this command requires the prior disabling of Direct2D (see the Direct2D disabled constant in the description of the SET DATABASE PARAMETER command).

Example

In a form, we display two identical SVG pictures then we create an "offset" filter and assign to the one on the right:

 $root:=SVG_New(400;400;"filters test") //definition of first (left) picture

 $rect:=SVG_New_rect($root;10;10;380;100;0;0;"darkblue";"white";1)

 SVG_SET_FILL_BRUSH($root;"orange")

 $textAreaRef:=SVG_New_textArea($root;"Hello World!";10;10;380;100;"arial";60;Normal;Align center)

 <>pict1:=SVG_Export_to_picture($root) //display first picture

 

 $root2:=SVG_New(400;400;"filters test") //definition of identical (right) picture

 $rect2:=SVG_New_rect($root2;10;10;380;100;0;0;"darkblue";"white";1)

 SVG_SET_FILL_BRUSH($root2;"orange")

 $textAreaRef2:=SVG_New_textArea($root2;"Hello World!";10;10;380;100;"arial";60;Normal;Align center)

 

 $filter:=SVG_Define_filter($root2;"Offset") //create filter

 SVG_Filter_Offset($filter;10;20)

 SVG_SET_FILTER($textAreaRef2;"Offset") //apply filter

 

 <>pict2:=SVG_Export_to_picture($root2) //display second picture

Result: