The graphics2d package of the FreeHEP library

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The graphics2d package of the FreeHEP library

• Simon Fischer (University of Dortmund)
• Sami Kama (METU, Ankara)

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Overview

1. Features
2. Package structure and inheritance tree
3. Users view example and demo
4. PDFGraphics2D
5. Font inclusion
6. Todo

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1.1 Features

• Export graphics displayed on the screen to a file
• in a portable format (PDF, PS)
• independent of the generating application (e.g.
  JAS/WIRED)
• additional features (limited html strings,
  symbols)
• Subclass the java.awt.Graphics2D
• easily export everything that can be rendered by
  a graphics context

PDF File
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1.2 Division of Work

• What we built on
• Mark Dönszelmann PDF writer and utilities
• Charles Loomis PSGraphics and VectorGraphics
  interfaces
• Whats new?
• PDFGraphics2D
• Type1 and Type3 font embedding both for ps and
  pdf
• multipage output

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2.1 The graphics2d Inheritance Tree
GraphicsdrawLine()drawString()drawImage()
Java 1.1
Graphics2Ddraw(Shape)setTransform()setStroke()
Java 2
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2.2 The VectorGraphics2D Implementations

• VectorGraphics2D implementations
• PixelGraphics2D
• PDFGraphics2D
• PSGraphics2D
• SVGGraphics2D
• Additional Exportfilters for bitmaps
• gif, png, ppm

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2.3 Additional Utility Classes
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3.1 Code Example
public static void export(Component component
String filename)
throws IOException
PDFGraphics2D graphics PDFGraphics2D.createP
DFGraphics2D( component.getSize(),
new FileOutputStream(filename) )
graphics.writeHeader() component.printAll(graph
ics) graphics.donePrinting()
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D E M O
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4. PDFGraphics2D
VectorGraphics2D
MultipageDocument
PDFImageDelayQueue
PDFPaintDelayQueue
PDFFontTable
GenericTagHandler
PDFWriter implements PathConstructor
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5.1 Font Embedding (1)

• Embed shapes of glyphs plus metric information in
  PDF/PS files
• Type3 fonts
• simple
• large files
• Type1 fonts
• more difficult (binary, encrypted) representation
• compact format (filesize approx. factor 5)
• hints for better display/rendering of fonts

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5.2 Font Embedding (2)
Hello W
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5.3 Generation of CharTables
CharTabletoName()toEncoding()toUnicode()
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5.4 Font Enbedding (3)
Font
PDFLatin
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5.5 Font Embedding (4)
!FontType1-1.0 Monotype Corsiva Generated by
org.freehep.graphics2d.FontEmbedderType111 dict
begin/FontInfo 8 dict dup begin/FullName
(Monotype Corsiva) readonly def/FamilyName
(Monotype Corsiva) readonly defend readonly
def/Encoding 256 array0 1 255 1 index exch
/.notdef put fordup 24 /breve putdup 25 /caron
put...dup 255 /ydieresis putreadonly
defcurrentdict enddup /Private 8 dict dup
begin2 index /CharStrings 230 dict dup
begin/breve 91 RD binary dataND/caron 40 RD
binary dataND.../ydieresis 360 binary
dataND/.notdef 38 RD binary dataNDend end
readonly put noaccess putdup /FontName get exch
definefont pop
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5.6 Font Embedding Classes
FontIncluder
FontEmbedder
FontEmbedderPDF
FontEmbedderType1
FontEmbedderPDFType3
FontEmbedderType1PDF
FontEmbedderPS
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6. Todo

• PDF
• thumbnails and bookmarks for PDF
• cyclic gradient and custom fill
• Fonts
• add hints to type 1 fonts
• Misc
• progress bar for exporting files