IDevice class

IDevice class

Defines methods and properties that support custom rendering of the graphic elements like paths, text and images.

The IDevice type exposes the following members:

Properties

PropertyDescription
optionsGets rendering options.
graphic_contextGets the graphic context.

Methods

MethodDescription
save_graphic_contextPushes a copy of the entire graphics context onto the stack.
restore_graphic_contextRestores the entire graphics context to its former value by popping it from the stack.
begin_documentBegins rendering of the document.
end_documentEnds rendering of the document.
begin_pageBegins rendering of the new page.
end_pageEnds rendering of the current page.
begin_elementBegins rendering of the element.
end_elementEnds rendering of the element.
close_pathCloses the current subpath by appending a straight line segment from the current point to the starting point of the subpath.
If the current subpath is already closed, “ClosePath” does nothing.
This operator terminates the current subpath. Appending another segment to the current path begins a new subpath,
even if the new segment begins at the endpoint reached by the “ClosePath” method.
move_toBegins a new subpath by moving the current point to coordinates of the parameter pt, omitting any connecting line segment.
If the previous path construction method in the current path was also “MoveTo”, the new “MoveTo” overrides it;
no vestige of the previous “MoveTo” operation remains in the path.
line_toAppends a straight line segment from the current point to the point (pt). The new current point is pt.
add_rectAppends a rectangle to the current path as a complete subpath.
cubic_bezier_toAppends a cubic Bézier curve to the current path. The curve extends from the current point to the point pt3,
using pt1 and pt2 as the Bézier control points. The new current point is pt3.
strokeStrokes a line along the current path. The stroked line follows each straight or curved segment in the path,
centered on the segment with sides parallel to it. Each of the path’s subpaths is treated separately.
This method terminates current path.
fillFills the entire region enclosed by the current path.
If the path consists of several disconnected subpaths, it fills the insides of all subpaths,
considered together.
This method terminates current path.
clipModifies the current clipping path by intersecting it with the current path, using the FillRule to determine the region to fill.
This method terminates current path.
stroke_and_fillStrokes and fill current path.
This method terminates current path.
fill_textFills the specified text string at the specified location.
stroke_textStrokes the specified text string at the specified location.
draw_imageDraws the specified image.
flushFlushes all data to output stream.

See Also