Using SVG filters to apply a duotone effect.
Last active
May 29, 2019 19:54
-
-
Save veltman/87633b7e8de11a3a09af8ab3ee960f15 to your computer and use it in GitHub Desktop.
Duotoning
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <body> | |
| <svg width="960" height="500"> | |
| <defs> | |
| <filter id="duotone" color-interpolation-filters="sRGB"> | |
| <feColorMatrix type="saturate" values="0" /> | |
| <feColorMatrix type="matrix" /> | |
| </filter> | |
| </defs> | |
| <image width="960" height="500" filter="url(#duotone)" xlink:href="bonneville.jpg"/> | |
| </svg> | |
| <script src="//d3js.org/d3.v4.min.js"></script> | |
| <script> | |
| var filter = d3.select("feColorMatrix:last-child"), | |
| matrix = [ | |
| [ 0, 0, 0, 0, 0 ], | |
| [ 0, 0, 0, 0, 0 ], | |
| [ 0, 0, 0, 0, 0 ], | |
| [ 0, 0, 0, 1, 0 ], | |
| ]; | |
| d3.timer(function(t){ | |
| var bg, | |
| fg; | |
| t = t % 7500 / 7500; | |
| if (t > 0.5) t = 1 - t; | |
| fg = d3.rgb(d3.interpolateWarm(t)).darker(0.25); | |
| bg = d3.rgb(d3.interpolateCool(1 - t)).brighter(0.5); | |
| ["r", "g", "b"].forEach(function(d, i){ | |
| matrix[i][i] = (bg[d] - fg[d]) / 255; | |
| matrix[i][4] = fg[d] / 255; | |
| }); | |
| filter.attr("values", matrix.join(" ")); | |
| }); | |
| </script> |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment