Safe Haskell	None

Pdf.Toolbox.Content.Processor

Description

Process content stream operators maintaining graphics state

It is pretty experimental

Synopsis

Documentation

Processor maintains graphics state

Constructors

Processor
Fields prState :: GraphicsState prStateStack :: [GraphicsState] prGlyphDecoder :: GlyphDecoder prGlyphs :: [[Glyph]] Each element is a list of glyphs, drawn in one shot

Graphics state

Constructors

GraphicsState
Fields gsInText :: Bool Indicates that we are inside text object gsCurrentTransformMatrix :: Transform Double gsFont :: Maybe Name gsFontSize :: Maybe Double gsTextMatrix :: Transform Double Defined only inside text object gsTextLineMatrix :: Transform Double Defined only inside text object gsTextLeading :: Double gsTextCharSpacing :: Double gsTextWordSpacing :: Double

Instances

Given font name and string, it should return list of glyphs and their widths.

Note: it should not try to position or scale glyphs to user space, bounding boxes should be defined in glyph space.

Note: glyph width is a distance between the glyph's origin and the next glyph's origin, so it generally can't be calculated from bounding box

Note: the Processor actually doesn't cares about glyph's bounding box, so you can return anything you want

Glyph

Constructors

Glyph
Fields glyphCode :: Int The code as read from content stream glyphTopLeft :: Vector Double Top-left corner of glyph's bounding box glyphBottomRight :: Vector Double Bottom-right corner of glyph's bounding box glyphText :: Maybe Text Text ectracted from the glyph

Instances

Empty graphics state

Create processor in initial state

Process one operation