org.apache.fop.render.ps

Class PSPainter

java.lang.Object

org.apache.fop.render.intermediate.AbstractIFPainter<PSDocumentHandler>

org.apache.fop.render.ps.PSPainter

All Implemented Interfaces:

IFPainter

public class PSPainter
extends AbstractIFPainter<PSDocumentHandler>

IFPainter implementation that produces PostScript.

Field Summary

Fields inherited from class org.apache.fop.render.intermediate.AbstractIFPainter

INSTREAM_OBJECT_URI, state

Constructor Summary

Constructors

Modifier	Constructor and Description
	PSPainter(PSDocumentHandler documentHandler) Default constructor.
protected	PSPainter(PSDocumentHandler documentHandler, IFState state)

Method Summary

Methods

Modifier and Type	Method and Description
protected void	beginTextObject() Indicates the beginning of a text object.
void	clipBackground(Rectangle rect, BorderProps bpsBefore, BorderProps bpsAfter, BorderProps bpsStart, BorderProps bpsEnd) Restricts the current clipping region to the inner border.
void	clipRect(Rectangle rect) Restricts the current clipping region with the given rectangle.
protected Map	createDefaultImageProcessingHints(org.apache.xmlgraphics.image.loader.ImageSessionContext sessionContext) Creates the default map of processing hints for the image loading framework.
protected RenderingContext	createRenderingContext() Creates a new RenderingContext instance.
void	drawBorderRect(Rectangle rect, BorderProps top, BorderProps bottom, BorderProps left, BorderProps right, Color innerBackgroundColor) Draws a border rectangle.
void	drawImage(Document doc, Rectangle rect) Draws an image (represented by a DOM document) inside a given rectangle.
void	drawImage(String uri, Rectangle rect) Draws an image identified by a URI inside a given rectangle.
protected void	drawImageUsingImageHandler(org.apache.xmlgraphics.image.loader.ImageInfo info, Rectangle rect) Loads a preloaded image and draws it using a suitable image handler.
void	drawLine(Point start, Point end, int width, Color color, RuleStyle style) Draws a line.
void	drawText(int x, int y, int letterSpacing, int wordSpacing, int[][] dp, String text) Draws text.
void	endGroup() Ends the current group and restores the previous coordinate system (and layer).
protected void	endTextObject() Indicates the end of a text object.
void	endViewport() Ends the current viewport and restores the previous coordinate system.
void	fillRect(Rectangle rect, Paint fill) Fills a rectangular area.
protected void	restoreGraphicsState() Restores the last graphics state of the rendering engine.
protected void	saveGraphicsState() Saves the graphics state of the rendering engine.
void	startGroup(AffineTransform transform, String layer) Starts a new group of graphical elements.
void	startViewport(AffineTransform transform, Dimension size, Rectangle clipRect) Starts a new viewport, establishing a new coordinate system.

Methods inherited from class org.apache.fop.render.intermediate.AbstractIFPainter

drawImage, drawImage, drawImageUsingDocument, drawImageUsingURI, drawText, getContext, getDocumentHandler, getFontInfo, getFontKey, getImageInfo, getLineBoundingBox, getUserAgent, hasOnlySolidBorders, isBackgroundRequired, setFont, startGroup, startViewport, toPoints

Methods inherited from class java.lang.Object

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

Constructor Detail

PSPainter

public PSPainter(PSDocumentHandler documentHandler)

Default constructor.

Parameters:

documentHandler - the parent document handler

PSPainter

protected PSPainter(PSDocumentHandler documentHandler,
         IFState state)

Method Detail

startViewport

public void startViewport(AffineTransform transform,
                 Dimension size,
                 Rectangle clipRect)
                   throws IFException

Starts a new viewport, establishing a new coordinate system. A viewport has a size and can optionally be clipped. Corresponds to SVG's svg element.

Parameters:

transform - the transformation matrix establishing the new coordinate system

size - the size of the viewport

clipRect - the clipping rectangle (may be null)

Throws:

IFException - if an error occurs while handling this element

endViewport

public void endViewport()
                 throws IFException

Ends the current viewport and restores the previous coordinate system.

Throws:

IFException - if an error occurs while handling this element

startGroup

public void startGroup(AffineTransform transform,
              String layer)
                throws IFException

Starts a new group of graphical elements. Corresponds to SVG's g element.

Parameters:

transform - the transformation matrix establishing the new coordinate system

layer - an optional layer label (or null if none)

Throws:

IFException - if an error occurs while handling this element

endGroup

public void endGroup()
              throws IFException

Ends the current group and restores the previous coordinate system (and layer).

Throws:

IFException - if an error occurs while handling this element

createDefaultImageProcessingHints

protected Map createDefaultImageProcessingHints(org.apache.xmlgraphics.image.loader.ImageSessionContext sessionContext)

Creates the default map of processing hints for the image loading framework.

Overrides:

createDefaultImageProcessingHints in class AbstractIFPainter<PSDocumentHandler>

Parameters:

sessionContext - the session context for access to resolution information

Returns:

the default processing hints

createRenderingContext

protected RenderingContext createRenderingContext()

Creates a new RenderingContext instance.

Specified by:

createRenderingContext in class AbstractIFPainter<PSDocumentHandler>

Returns:

the new rendering context.

drawImageUsingImageHandler

protected void drawImageUsingImageHandler(org.apache.xmlgraphics.image.loader.ImageInfo info,
                              Rectangle rect)
                                   throws org.apache.xmlgraphics.image.loader.ImageException,
                                          IOException

Loads a preloaded image and draws it using a suitable image handler.

Overrides:

drawImageUsingImageHandler in class AbstractIFPainter<PSDocumentHandler>

Parameters:

info - the information object of the preloaded image

rect - the rectangle in which to paint the image

Throws:

org.apache.xmlgraphics.image.loader.ImageException - if there's an error while processing the image

IOException - if there's an I/O error while loading the image

drawImage

public void drawImage(String uri,
             Rectangle rect)
               throws IFException

Draws an image identified by a URI inside a given rectangle. This is the equivalent to an fo:external-graphic in XSL-FO.

Parameters:

uri - the image's URI

rect - the rectangle in which the image shall be painted

Throws:

IFException - if an error occurs while handling this event

drawImage

public void drawImage(Document doc,
             Rectangle rect)
               throws IFException

Draws an image (represented by a DOM document) inside a given rectangle. This is the equivalent to an fo:instream-foreign-object in XSL-FO.

Parameters:

doc - the DOM document containing the foreign object

rect - the rectangle in which the image shall be painted

Throws:

IFException - if an error occurs while handling this event

clipRect

public void clipRect(Rectangle rect)
              throws IFException

Restricts the current clipping region with the given rectangle.

Parameters:

rect - the rectangle's coordinates and extent

Throws:

IFException - if an error occurs while handling this event

clipBackground

public void clipBackground(Rectangle rect,
                  BorderProps bpsBefore,
                  BorderProps bpsAfter,
                  BorderProps bpsStart,
                  BorderProps bpsEnd)
                    throws IFException

Restricts the current clipping region to the inner border.

Parameters:

rect - the rectangle's coordinates and extent

bpsBefore - the border segment on the before-side (top)

bpsAfter - the border segment on the after-side (bottom)

bpsStart - the border segment on the start-side (left)

bpsEnd - the border segment on the end-side (right)

Throws:

IFException - if an error occurs while handling this event

fillRect

public void fillRect(Rectangle rect,
            Paint fill)
              throws IFException

Fills a rectangular area.

Parameters:

rect - the rectangle's coordinates and extent

fill - the fill paint

Throws:

IFException - if an error occurs while handling this event

drawBorderRect

public void drawBorderRect(Rectangle rect,
                  BorderProps top,
                  BorderProps bottom,
                  BorderProps left,
                  BorderProps right,
                  Color innerBackgroundColor)
                    throws IFException

Draws a border rectangle. The border segments are specified through BorderProps instances.

Specified by:

drawBorderRect in interface IFPainter

Overrides:

drawBorderRect in class AbstractIFPainter<PSDocumentHandler>

Parameters:

rect - the rectangle's coordinates and extent

top - the border segment on the top edge

bottom - the border segment on the bottom edge

left - the border segment on the left edge

right - the border segment on the right edge

innerBackgroundColor - the color of the inner background

Throws:

IFException - if an error occurs while handling this event

drawLine

public void drawLine(Point start,
            Point end,
            int width,
            Color color,
            RuleStyle style)
              throws IFException

Draws a line. NOTE: Currently, only horizontal lines are implemented!

Specified by:

drawLine in interface IFPainter

Overrides:

drawLine in class AbstractIFPainter<PSDocumentHandler>

Parameters:

start - the start point of the line

end - the end point of the line

width - the line width

color - the line color

style - the line style (using the Constants.EN_* constants for the rule-style property)

Throws:

IFException - if an error occurs while handling this event

saveGraphicsState

protected void saveGraphicsState()
                          throws IOException

Saves the graphics state of the rendering engine.

Throws:

IOException - if an I/O error occurs

restoreGraphicsState

protected void restoreGraphicsState()
                             throws IOException

Restores the last graphics state of the rendering engine.

Throws:

IOException - if an I/O error occurs

beginTextObject

protected void beginTextObject()
                        throws IOException

Indicates the beginning of a text object.

Throws:

IOException - if an I/O error occurs

endTextObject

protected void endTextObject()
                      throws IOException

Indicates the end of a text object.

Throws:

IOException - if an I/O error occurs

drawText

public void drawText(int x,
            int y,
            int letterSpacing,
            int wordSpacing,
            int[][] dp,
            String text)
              throws IFException

Draws text. The initial coordinates (x and y) point to the starting point at the normal baseline of the font. The parameters letterSpacing, wordSpacing and the array dx are optional and can be used to influence character positioning (for example, for kerning).

Parameters:

x - X-coordinate of the starting point of the text

y - Y-coordinate of the starting point of the text

letterSpacing - additional spacing between characters (may be 0)

wordSpacing - additional spacing between words (may be 0)

dp - an array of 4-tuples, expressing [X,Y] placment adjustments and [X,Y] advancement adjustments, in that order (may be null); if not null, then adjustments.length must be the same as text.length()

text - the text

Throws:

IFException - if an error occurs while handling this event