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Scale image in Plotly.toImage - #1979
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- which draw image data on bigger canvas (for png/jpeg/webp) - and scales svg using top-level width/height/viewBox attribute
etpinard
commented
Sep 1, 2017
| // extend config for static plot | ||
| var configImage = Lib.extendFlat({}, config, { | ||
| staticPlot: true, | ||
| plotGlPixelRatio: config.plotGlPixelRatio || 2, |
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Ooops. This should have been in a separate commit. In brief, this line was useless, so 🔪
alexcjohnson
reviewed
Sep 1, 2017
| var canvas = opts.canvas; | ||
| var scale = opts.scale || 1; | ||
| var w0 = opts.width || 150; | ||
| var h0 = opts.height || 300; |
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Brilliant. 💃 after #1979 (comment) |
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Thanks for the quick review @alexcjohnson ! I'll leave this one unmerged until |
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This PR adds a
scaleoption toPlotly.toImage(andPlotly.downloadImage) which scales the generated image by a given factor. Note that, scaling an image isn't the same as just relayouting it to some factor times the current layoutwidth/heightvalues. Scaling scales every feature of a graph - this should help users that want higher resolution image exports.The new
scalehas an effect on all the supported formats. Forpng,jpegandwebpthis is accomplished usingcontext.drawImage's width/height options. Forsvg, we tweak theviewBoxattribute similar to during scroll/pan interactions.