render emojis in share links

[codyzu]

• encode which emojis into query params
• download image, using imagemagick to render with emojis
• convert to data uri and embedded in html response... magic! no, won't work, since the image in share cards is static... will have to render images directly.
• command to convert images to data uri: https://gist.github.com/vadimkantorov/ccd451ff0d6f9b188c11822acfdd64a9
• command to add emojis using imagemagick: magick convert slide.webp -background none -compose dissolve -define compose:args=70% \( -density 288 ./heart.svg \) -geometry +200+400 -composite slides.webp
  • mess with the density to change the size of the emoji: 72 is 100%, 288 is 400% etc
• article about serving images with cloud functions: https://maxbarry.medium.com/dynamic-on-demand-image-resizing-using-firebase-hosting-and-google-cloud-functions-to-make-a-cheap-d64e8f5805d1
• could also use sharp on node.js, maybe its faster because it uses libvips?