SVGRipper

SVRG Binary Format

SVGR binary format is a compact representation of SVG paths. It is designed to be used to limit resources usage (for example in embedded systems) or in regular websites / web applications for convenient SVG managmenet, such as icons and sprite libraries. The format uses variable bit-lenght and Huffman encoding of the path segments.

Constants

| Constant | Default Value | Description | | --------------------- | ------------- | --------------------------------------- | | MAX_ABSOLUTE_BITS | 13 | Maximum bits for absolute coordinates | | FREQUENCY_BITS | 5 | Number of bits for frequency table item |

Header

• [x: MAX_ABSOLUTE_BITS, [y: MAX_ABSOLUTE_BITS] -- ViewBox
• [bits: FREQUENCY_BITS] -- Number of bits in the frequency table item, 0 means no huffman encoding used
• [symbols: MAX_ABSOLUTE_BITS] -- Number of symbols in the Huffman table
• [frequency: bits]... -- frequency for each symbol in the table

Path Segments

• 0 | 1 : 1bit -- 0 means MoveTo relative to previous segment's initial point, 1 means MoveTo absolute coordinates
  • If relative, then should fit Huffman encoding, otherwise absolute coordinates
  • [x: MAX_ABSOLUTE_BITS], [y: MAX_ABSOLUTE_BITS] -- MoveTo command [x, y], absolute coordinates

For each LineTo command:

• [dx: HuffmanCode, dy: HuffmanCode]... -- Huffman encoding for path segments

End of path:

• [0: HuffmanCode, 0: HuffmanCode] -- ClosePath command