Module chart_export 

Chart export: the chart is drawn once as SVG, in the bundled font (IBM Plex Sans, under the SIL Open Font License, in assets/fonts), then written as SVG with its text as outlines, rasterized to PNG, or written as PDF from the same outlines (chart_pdf). The same figure comes out the same on every machine; text the bundled font lacks falls back to a system font.

Structs

ChartExportRequest

What a chart export asks for: where, in what format, how.

ExportOptions

How an export is made: its size, colors, legend and words.

Figure

A chart ready to draw: what it plots, and what it says about its rows (a sample, values a range left out).

Palette

The colors a figure is drawn in.

Rgb

An sRGB color.

Enums

ChartExportFormat

Export format for a chart.

ExportStyle

The colors an export is drawn in.

LegendPlace

Where the series are named.

LineWidth

A line chart’s stroke.

PointOpacity

How opaque a scatter’s points are.

PointSize

A scatter point’s radius.

SizePreset

A size an export is made at: pixels, and the resolution that makes them a physical size (a PDF’s page, an SVG’s inches, the text’s points).

Constants

RECIPE_KEY

The key a recipe is kept under: a PNG chunk’s keyword, the SVG element’s name, the PDF’s info entry.

SERIES

Series colors a palette has: as many as the theme’s chart slots.

Functions

auto_opacity

Opaque up to 1,000 points, 0.15 from 100,000, and between them along the log of the count: each tenfold more points is drawn as much fainter.

recipe_in

The recipe an exported chart carries, if it carries one.

render

The figure in format, as the bytes of the file.

svg

The SVG for figure, before its text is set.