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Diffstat (limited to 'web/tvl/logo/default.nix')
-rw-r--r-- | web/tvl/logo/default.nix | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/web/tvl/logo/default.nix b/web/tvl/logo/default.nix new file mode 100644 index 000000000000..d9e023946a42 --- /dev/null +++ b/web/tvl/logo/default.nix @@ -0,0 +1,97 @@ +# Creates an output containing the logo in SVG format (animated and +# static, one for each background colour) and without animations in +# PNG. +{ depot, lib, pkgs, ... }: + +let + palette = { + purple = "#CC99C9"; + blue = "#9EC1CF"; + green = "#9EE09E"; + yellow = "#FDFD97"; + orange = "#FEB144"; + red = "#FF6663"; + }; + + staticCss = colour: '' + #armchair-background { + fill: ${colour}; + } + ''; + + # Create an animated CSS that equally spreads out the colours over + # the animation duration (1min). + animatedCss = colours: + let + # Calculate at which percentage offset each colour should appear. + stepSize = 100 / ((builtins.length colours) - 1); + frames = lib.imap0 (idx: colour: { inherit colour; at = idx * stepSize; }) colours; + frameCss = frame: "${toString frame.at}% { fill: ${frame.colour}; }"; + in + '' + #armchair-background { + animation: 30s infinite alternate armchairPalette; + } + + @keyframes armchairPalette { + ${lib.concatStringsSep "\n" (map frameCss frames)} + } + ''; + + # Dark version of the logo, suitable for light backgrounds. + darkCss = armchairCss: '' + .structure { + fill: #383838; + } + #letters { + fill: #fefefe; + } + ${armchairCss} + ''; + + # Light version, suitable for dark backgrounds. + lightCss = armchairCss: '' + .structure { + fill: #e4e4ef; + } + #letters { + fill: #181818; + } + ${armchairCss} + ''; + + logoShapes = builtins.readFile ./logo-shapes.svg; + logoSvg = style: '' + <svg xmlns="http://www.w3.org/2000/svg" xml:space="preserve" viewBox="420 860 1640 1500" + xmlns:xlink="http://www.w3.org/1999/xlink"> + <style>${style}</style> + ${logoShapes} + </svg> + ''; + +in +depot.nix.readTree.drvTargets (lib.fix (self: { + # Expose the logo construction functions. + inherit palette darkCss lightCss animatedCss staticCss; + + # Create a TVL logo SVG with the specified style. + logoSvg = style: pkgs.writeText "logo.svg" (logoSvg style); + + # Create a PNG of the TVL logo with the specified style and DPI. + logoPng = style: dpi: pkgs.runCommandNoCC "logo.png" { } '' + ${pkgs.inkscape}/bin/inkscape \ + --export-area-drawing \ + --export-background-opacity 0 \ + --export-dpi ${toString dpi} \ + ${self.logoSvg style} -o $out + ''; + + # Animated dark SVG logo with all colours. + pastelRainbow = self.logoSvg (darkCss (animatedCss (lib.attrValues palette))); +} + + # Add individual outputs for static dark logos of each colour. + // (lib.mapAttrs' + (k: v: lib.nameValuePair "${k}Png" + (self.logoPng (darkCss (staticCss v)) 96)) + palette))) |