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Diffstat (limited to 'web/tvl/logo/default.nix')
-rw-r--r-- | web/tvl/logo/default.nix | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/web/tvl/logo/default.nix b/web/tvl/logo/default.nix new file mode 100644 index 000000000000..cb09dc28ecfa --- /dev/null +++ b/web/tvl/logo/default.nix @@ -0,0 +1,70 @@ +# 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"; + }; + + logoShapes = builtins.readFile ./logo-shapes.svg; + logoSvg = style: '' + <svg xmlns="http://www.w3.org/2000/svg" xml:space="preserve" viewBox="0 0 2480 3508"> + <style>${style}</style> + ${logoShapes} + </svg> + ''; + + 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: 60s infinite alternate armchairPalette; + } + + @keyframes armchairPalette { + ${lib.concatStringsSep "\n" (map frameCss frames)} + } + ''; + +in depot.nix.utils.drvTargets(lib.fix (self: { + inherit palette; + + # Create a TVL logo SVG with the specified static armchair colour. + staticLogoSvg = colour: pkgs.writeText "logo.svg" (logoSvg (staticCss colour)); + + # Create a TVL logo SVG with the specified animated armchair colour set. + animatedLogoSvg = colours: pkgs.writeText "logo.svg" (logoSvg (animatedCss colours)); + + # Create a PNG of the TVL logo with the specified static armchair colour and DPI. + logoPng = colour: dpi: pkgs.runCommandNoCC "logo.png" {} '' + ${pkgs.inkscape}/bin/inkscape \ + --export-area-drawing \ + --export-background-opacity 0 \ + --export-dpi ${toString dpi} \ + ${self.staticLogoSvg colour} -o $out + ''; + + # Animated SVG logo with all colours. + pastelRainbow = self.animatedLogoSvg (lib.attrValues palette); +} + +# Add individual outputs for static logos of each colour. +// (lib.mapAttrs' (k: v: lib.nameValuePair "${k}Png" (self.logoPng v 96)) palette))) |