Add TIL on SVG favicon

1 files changed, 143 insertions, 0 deletions

diff --git a/locale/fr/LC_MESSAGES/_tils/2020-12-29-svg-favicon.po b/locale/fr/LC_MESSAGES/_tils/2020-12-29-svg-favicon.po
new file mode 100644
index 0000000..8c2caf8
--- /dev/null
+++ b/locale/fr/LC_MESSAGES/_tils/2020-12-29-svg-favicon.po
@@ -0,0 +1,143 @@
+#
+msgid ""
+msgstr ""
+
+msgid ""
+"title: SVG favicon\n"
+"date: 2020-12-29\n"
+"layout: post\n"
+"lang: en\n"
+"ref: svg-favicon"
+msgstr ""
+
+msgid ""
+"I've wanted to change this website's favicon from a plain `.ico` file to a "
+"proper SVG. The problem I was trying to solve was to reuse the same image on"
+" other places, such as avatars."
+msgstr ""
+
+msgid ""
+"Generating a PNG from the existing 16x16 icon was possible but bad: the "
+"final image was blurry. Converting the `.ico` to an SVG was possible, but "
+"sub-optimal: tools try to guess some vector paths, and the final SVG didn't "
+"match the original."
+msgstr ""
+
+msgid ""
+"Instead I used a tool to draw the \"vector pixels\" as black squares, and "
+"after getting the final result I manually cleaned-up the generated XML:"
+msgstr ""
+
+msgid ""
+"<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>\n"
+"<svg xmlns=\"http://www.w3.org/2000/svg\" viewBox=\"0 0 16 16\" width=\"16\" height=\"16\">\n"
+"  <path d=\"M 0  8  L 1  8  L 1  9  L 0  9  L 0  8  Z\" />\n"
+"  <path d=\"M 0  13 L 1  13 L 1  14 L 0  14 L 0  13 Z\" />\n"
+"  <path d=\"M 1  8  L 2  8  L 2  9  L 1  9  L 1  8  Z\" />\n"
+"  <path d=\"M 1  13 L 2  13 L 2  14 L 1  14 L 1  13 Z\" />\n"
+"  <path d=\"M 2  8  L 3  8  L 3  9  L 2  9  L 2  8  Z\" />\n"
+"  <path d=\"M 2  13 L 3  13 L 3  14 L 2  14 L 2  13 Z\" />\n"
+"  <path d=\"M 3  8  L 4  8  L 4  9  L 3  9  L 3  8  Z\" />\n"
+"  <path d=\"M 3  13 L 4  13 L 4  14 L 3  14 L 3  13 Z\" />\n"
+"  <path d=\"M 4  7  L 5  7  L 5  8  L 4  8  L 4  7  Z\" />\n"
+"  <path d=\"M 4  8  L 5  8  L 5  9  L 4  9  L 4  8  Z\" />\n"
+"  <path d=\"M 4  13 L 5  13 L 5  14 L 4  14 L 4  13 Z\" />\n"
+"  <path d=\"M 5  6  L 6  6  L 6  7  L 5  7  L 5  6  Z\" />\n"
+"  <path d=\"M 5  7  L 6  7  L 6  8  L 5  8  L 5  7  Z\" />\n"
+"  <path d=\"M 5  13 L 6  13 L 6  14 L 5  14 L 5  13 Z\" />\n"
+"  <path d=\"M 6  5  L 7  5  L 7  6  L 6  6  L 6  5  Z\" />\n"
+"  <path d=\"M 6  6  L 7  6  L 7  7  L 6  7  L 6  6  Z\" />\n"
+"  <path d=\"M 6  14 L 7  14 L 7  15 L 6  15 L 6  14 Z\" />\n"
+"  <path d=\"M 7  1  L 8  1  L 8  2  L 7  2  L 7  1  Z\" />\n"
+"  <path d=\"M 7  14 L 8  14 L 8  15 L 7  15 L 7  14 Z\" />\n"
+"  <path d=\"M 7  15 L 8  15 L 8  16 L 7  16 L 7  15 Z\" />\n"
+"  <path d=\"M 7  2  L 8  2  L 8  3  L 7  3  L 7  2  Z\" />\n"
+"  <path d=\"M 7  3  L 8  3  L 8  4  L 7  4  L 7  3  Z\" />\n"
+"  <path d=\"M 7  4  L 8  4  L 8  5  L 7  5  L 7  4  Z\" />\n"
+"  <path d=\"M 7  5  L 8  5  L 8  6  L 7  6  L 7  5  Z\" />\n"
+"  <path d=\"M 8  1  L 9  1  L 9  2  L 8  2  L 8  1  Z\" />\n"
+"  <path d=\"M 8  15 L 9  15 L 9  16 L 8  16 L 8  15 Z\" />\n"
+"  <path d=\"M 9  1  L 10 1  L 10 2  L 9  2  L 9  1  Z\" />\n"
+"  <path d=\"M 9  2  L 10 2  L 10 3  L 9  3  L 9  2  Z\" />\n"
+"  <path d=\"M 9  6  L 10 6  L 10 7  L 9  7  L 9  6  Z\" />\n"
+"  <path d=\"M 9  15 L 10 15 L 10 16 L 9  16 L 9  15 Z\" />\n"
+"  <path d=\"M 10 2  L 11 2  L 11 3  L 10 3  L 10 2  Z\" />\n"
+"  <path d=\"M 10 3  L 11 3  L 11 4  L 10 4  L 10 3  Z\" />\n"
+"  <path d=\"M 10 4  L 11 4  L 11 5  L 10 5  L 10 4  Z\" />\n"
+"  <path d=\"M 10 5  L 11 5  L 11 6  L 10 6  L 10 5  Z\" />\n"
+"  <path d=\"M 10 6  L 11 6  L 11 7  L 10 7  L 10 6  Z\" />\n"
+"  <path d=\"M 11 6  L 12 6  L 12 7  L 11 7  L 11 6  Z\" />\n"
+"  <path d=\"M 11 8  L 12 8  L 12 9  L 11 9  L 11 8  Z\" />\n"
+"  <path d=\"M 10 15 L 11 15 L 11 16 L 10 16 L 10 15 Z\" />\n"
+"  <path d=\"M 11 10 L 12 10 L 12 11 L 11 11 L 11 10 Z\" />\n"
+"  <path d=\"M 11 12 L 12 12 L 12 13 L 11 13 L 11 12 Z\" />\n"
+"  <path d=\"M 11 14 L 12 14 L 12 15 L 11 15 L 11 14 Z\" />\n"
+"  <path d=\"M 11 15 L 12 15 L 12 16 L 11 16 L 11 15 Z\" />\n"
+"  <path d=\"M 12 6  L 13 6  L 13 7  L 12 7  L 12 6  Z\" />\n"
+"  <path d=\"M 12 8  L 13 8  L 13 9  L 12 9  L 12 8  Z\" />\n"
+"  <path d=\"M 12 10 L 13 10 L 13 11 L 12 11 L 12 10 Z\" />\n"
+"  <path d=\"M 12 12 L 13 12 L 13 13 L 12 13 L 12 12 Z\" />\n"
+"  <path d=\"M 12 14 L 13 14 L 13 15 L 12 15 L 12 14 Z\" />\n"
+"  <path d=\"M 13 6  L 14 6  L 14 7  L 13 7  L 13 6  Z\" />\n"
+"  <path d=\"M 13 8  L 14 8  L 14 9  L 13 9  L 13 8  Z\" />\n"
+"  <path d=\"M 13 10 L 14 10 L 14 11 L 13 11 L 13 10 Z\" />\n"
+"  <path d=\"M 13 12 L 14 12 L 14 13 L 13 13 L 13 12 Z\" />\n"
+"  <path d=\"M 13 13 L 14 13 L 14 14 L 13 14 L 13 13 Z\" />\n"
+"  <path d=\"M 13 14 L 14 14 L 14 15 L 13 15 L 13 14 Z\" />\n"
+"  <path d=\"M 14 7  L 15 7  L 15 8  L 14 8  L 14 7  Z\" />\n"
+"  <path d=\"M 14 8  L 15 8  L 15 9  L 14 9  L 14 8  Z\" />\n"
+"  <path d=\"M 14 9  L 15 9  L 15 10 L 14 10 L 14 9  Z\" />\n"
+"  <path d=\"M 14 10 L 15 10 L 15 11 L 14 11 L 14 10 Z\" />\n"
+"  <path d=\"M 14 11 L 15 11 L 15 12 L 14 12 L 14 11 Z\" />\n"
+"  <path d=\"M 14 12 L 15 12 L 15 13 L 14 13 L 14 12 Z\" />\n"
+"</svg>\n"
+msgstr ""
+
+msgid ""
+"The good thing about this new favicon is that a) it is simple enough that I "
+"feel comfortable editing it manually and b) it is an SVG, which means I can "
+"generate any desired size."
+msgstr ""
+
+msgid ""
+"With the new favicon file, I now had to add to the templates' `<head>` a "
+"`<link>` to this icon:"
+msgstr ""
+
+msgid ""
+"<head>\n"
+"  <meta charset=\"UTF-8\" />\n"
+"  <link rel=\"icon\" type=\"image/svg+xml\" href=\"/static/favicon.svg\">\n"
+"  ...\n"
+msgstr ""
+
+msgid ""
+"Still missing is a bitmap image for places that can't handle vector images. "
+"I used Jekyll generator to create an PNG from the existing SVG:"
+msgstr ""
+
+msgid ""
+"module Jekyll\n"
+"  class FaviconGenerator < Generator\n"
+"    safe true\n"
+"    priority :high\n"
+"\n"
+"    SIZE = 420\n"
+"\n"
+"    def generate(site)\n"
+"      svg = 'static/favicon.svg'\n"
+"      png = 'static/favicon.png'\n"
+"      unless File.exist? png then\n"
+"        puts \"Missing '#{png}', generating...\"\n"
+"        puts `inkscape -o #{png} -w #{SIZE} -h #{SIZE} #{svg}`\n"
+"      end\n"
+"    end\n"
+"  end\n"
+"end\n"
+msgstr ""
+
+msgid ""
+"I had to increase the priority of the generator so that it would run before "
+"other places that would use a `{% link /static/favicon.png %}`, otherwise "
+"the file would be considered missing."
+msgstr ""