Debugging with False Colours

library(svgparser)

Introduction

Sometimes when debugging an issue with an SVG it can be difficult to distinguish adjacent areas that are similarly coloured.

svgparser::read_svg() allows you to specify the name of a false colour palette which can be used to on the issues - or at least look like a work of Warhollian pop art while you try and figure it out!

How

Simply set the false_colour argument to svgparser::read_svg() to one of: ‘rainbow’, ‘hcl’, ‘heat’, ‘terrain’, ‘topo’, and ‘cm’.

svgparser will then sample randomly from these standard R colour palettes instead of using the correct colour.

`Original Image

tiger_filename <- system.file("tiger.svg", package = "svgparser")
tiger_grob <- svgparser::read_svg(tiger_filename)
grid::grid.draw(tiger_grob)

false_colour = 'rainbow'

tiger_filename <- system.file("tiger.svg", package = "svgparser")
tiger_grob <- svgparser::read_svg(tiger_filename, false_colour = 'rainbow')
grid::grid.draw(tiger_grob)

false_colour = 'hcl'

tiger_filename <- system.file("tiger.svg", package = "svgparser")
tiger_grob <- svgparser::read_svg(tiger_filename, false_colour = 'hcl')
grid::grid.draw(tiger_grob)

false_colour = 'heat'

tiger_filename <- system.file("tiger.svg", package = "svgparser")
tiger_grob <- svgparser::read_svg(tiger_filename, false_colour = 'heat')
grid::grid.draw(tiger_grob)

false_colour = 'terrain'

tiger_filename <- system.file("tiger.svg", package = "svgparser")
tiger_grob <- svgparser::read_svg(tiger_filename, false_colour = 'terrain')
grid::grid.draw(tiger_grob)