com.tinyline.svg
Class SVGRaster

java.lang.Object
  com.tinyline.svg.SVGRaster

public class SVGRaster

extends java.lang.Object

The SVGRaster class rasterizes the tree of SVGNodes onto the pixel buffer.

Rendering process

Each SVGNode "paint" operation draws over some area of the pixel buffer. When the area overlaps a previously painted area the new paint partially or completely obscures the old. When the paint is not completely opaque, the result is defined by the simple alpha blending rules.

Nodes in the SVGT tree have an implicit z drawing order. Subsequent nodes are painted on top of previously painted nodes.

When a graphic object is rendered, the geometry, image, and attribute information are combined to calculate which pixel values must be changed

paint() vs. update()

What is the purpose of having separate paint() and update() methods? A call to update() implies that the area defined by the device clip rectangle is "damaged" and must be completely repainted or updated, however a call to paint() does not imply this, which enables to do incremental painting.

Version:

1.10

Author:

Andrew Girow

Field Summary

SVGDocument	document The current SVGT document
SVGRect	origview The original viewport for this SVGRaster.
SVGNode	root The current SVGT root
static int	version The SVGRaster version number
SVGRect	view The current viewport for this SVGRaster.
TinyRect	viewport The current device viewport for this SVGRaster.

Constructor Summary

SVGRaster(TinyBuffer pixbuf)
Constructs a new SVGRaster for the given pixel buffer.

Method Summary

SVGDocument	createSVGDocument() Creates and returns a new EMPTY SVGT Document.
void	flush() Flushs the SVGRaster allocated resources.
SVGDocument	getSVGDocument() Returns the current SVGT Document.
Tiny2D	getTiny2D() Returns the current Tiny2D object.
void	paint() Paints the area under the device clip rectangle.
void	setCamera() Sets the camera transform of this SVGRaster.
void	setSVGDocument(SVGDocument doc) Sets the new current SVGT document.
void	update() Updates the area under the device clip rectangle.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

version

public static final int version

The SVGRaster version number

See Also:

Constant Field Values

document

public SVGDocument document

The current SVGT document

root

public SVGNode root

The current SVGT root

view

public SVGRect view

The current viewport for this SVGRaster.

origview

public SVGRect origview

The original viewport for this SVGRaster.

viewport

public TinyRect viewport

The current device viewport for this SVGRaster.

Constructor Detail

SVGRaster

public SVGRaster(TinyBuffer pixbuf)

Constructs a new SVGRaster for the given pixel buffer.

Parameters:

pixbuf - the pixel buffer.

Method Detail

setSVGDocument

public void setSVGDocument(SVGDocument doc)

Sets the new current SVGT document.

createSVGDocument

public SVGDocument createSVGDocument()

Creates and returns a new EMPTY SVGT Document.

getSVGDocument

public SVGDocument getSVGDocument()

Returns the current SVGT Document.

getTiny2D

public Tiny2D getTiny2D()

Returns the current Tiny2D object.

flush

public void flush()

Flushs the SVGRaster allocated resources.

setCamera

public void setCamera()

Sets the camera transform of this SVGRaster.

update

public void update()

Updates the area under the device clip rectangle. The area defined by the device clip rectangle was "damaged" and must be completely repainted.

paint

public void paint()

Paints the area under the device clip rectangle.