AFPPainter (Apache FOP Core 2.11 API)
Date: 2025-04-24

org.apache.fop.render.afp

## Class AFPPainter

- java.lang.Object
- - org.apache.fop.render.intermediate.AbstractIFPainter<AFPDocumentHandler>
  - - org.apache.fop.render.afp.AFPPainter

- All Implemented Interfaces:
    IFPainter

      public class AFPPainter
      extends AbstractIFPainter<AFPDocumentHandler>

  IFPainter implementation that produces AFP (MO:DCA).

- - ### Field Summary

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

      `INSTREAM_OBJECT_URI, state`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `AFPPainter(AFPDocumentHandler documentHandler)` Default constructor.

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `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.
    `protected void` | `drawImage(org.apache.xmlgraphics.image.loader.Image image, Rectangle rect, RenderingContext context, boolean convert, Map additionalHints)` Draws an image using a suitable image handler.
    `void` | `drawImage(String uri, Rectangle rect)` Draws an image identified by a URI inside a given rectangle.
    `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).
    `void` | `endViewport()` Ends the current viewport and restores the previous coordinate system.
    `void` | `fillBackground(Rectangle rect, Paint fill, BorderProps bpsBefore, BorderProps bpsAfter, BorderProps bpsStart, BorderProps bpsEnd)`
    `void` | `fillRect(Rectangle rect, Paint fill)` Fills a rectangular area.
    `String` | `getFontKey(FontTriplet triplet)`
    `protected org.apache.xmlgraphics.image.loader.Image` | `getImageForSupportedFlavors(org.apache.xmlgraphics.image.loader.ImageInfo info)`
    `boolean` | `isBackgroundRequired(BorderProps bpsBefore, BorderProps bpsAfter, BorderProps bpsStart, BorderProps bpsEnd)` TODO Painter-specific rounded borders logic required background drawing to be made optional.
    `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, drawImageUsingDocument, drawImageUsingImageHandler, drawImageUsingURI, drawSVGText, drawText, getContext, getDocumentHandler, getFontInfo, getImageInfo, getLineBoundingBox, getUserAgent, hasOnlySolidBorders, setFont, startGroup, startViewport, toPoints`

    - ### Methods inherited from class java.lang.Object

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

- - ### Constructor Detail

    - #### AFPPainter

          public AFPPainter(AFPDocumentHandler documentHandler)

      Default constructor.
      Parameters:
        `documentHandler` - the parent document handler

  - ### Method Detail

    - #### getFontKey

          public String getFontKey(FontTriplet triplet)
                            throws IFException

      Overrides:
        `getFontKey` in class `AbstractIFPainter<AFPDocumentHandler>`
      Throws:
        `IFException`

    - #### 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<AFPDocumentHandler>`
      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<AFPDocumentHandler>`
      Returns:
        the new rendering context.

    - #### 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

          protected void drawImage(org.apache.xmlgraphics.image.loader.Image image,
                                   Rectangle rect,
                                   RenderingContext context,
                                   boolean convert,
                                   Map additionalHints)
                            throws IOException,
                                   org.apache.xmlgraphics.image.loader.ImageException

      Draws an image using a suitable image handler.
      Overrides:
        `drawImage` in class `AbstractIFPainter<AFPDocumentHandler>`
      Parameters:
        `image` - the image to be painted (it needs to of a supported image flavor)
        `rect` - the rectangle in which to paint the image
        `context` - a suitable rendering context
        `convert` - true to run the image through image conversion if that is necessary
        `additionalHints` - additional image processing hints
      Throws:
        `IOException` - in case of an I/O error while handling/writing the image
        `org.apache.xmlgraphics.image.loader.ImageException` - if an error occurs while converting the image to a suitable format

    - #### 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

    - #### 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

      Description copied from class: `AbstractIFPainter`
      Draws a border rectangle. The border segments are specified through `BorderProps` instances.
      Specified by:
        `drawBorderRect` in interface `IFPainter`
      Overrides:
        `drawBorderRect` in class `AbstractIFPainter<AFPDocumentHandler>`
      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<AFPDocumentHandler>`
      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

    - #### 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

    - #### 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

    - #### 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

    - #### isBackgroundRequired

          public boolean isBackgroundRequired(BorderProps bpsBefore,
                                              BorderProps bpsAfter,
                                              BorderProps bpsStart,
                                              BorderProps bpsEnd)

      TODO Painter-specific rounded borders logic required background drawing to be made optional. A future refactoring of the rounded borders code should aim to make the need for this abstraction obsolete
      Specified by:
        `isBackgroundRequired` in interface `IFPainter`
      Overrides:
        `isBackgroundRequired` in class `AbstractIFPainter<AFPDocumentHandler>`
      Parameters:
        `bpsBefore` - the before border
        `bpsAfter` - the after border
        `bpsStart` - the start border
        `bpsEnd` - the end border
      Returns:
        true if and only if background drawing is required

    - #### fillBackground

          public void fillBackground(Rectangle rect,
                                     Paint fill,
                                     BorderProps bpsBefore,
                                     BorderProps bpsAfter,
                                     BorderProps bpsStart,
                                     BorderProps bpsEnd)
                              throws IFException

      Throws:
        `IFException`

    - #### getImageForSupportedFlavors

          protected org.apache.xmlgraphics.image.loader.Image getImageForSupportedFlavors(org.apache.xmlgraphics.image.loader.ImageInfo info)

      Overrides:
        `getImageForSupportedFlavors` in class `AbstractIFPainter<AFPDocumentHandler>`

Copyright © 2025 Apache Software Foundation. All rights reserved.