{"version":1,"type":"rich","provider_name":"Libsyn","provider_url":"https:\/\/www.libsyn.com","height":90,"width":600,"title":"The Mystery of Mac OS\u2019 Mangled Image Interpolation Implementation","description":"-=- Here in Userlandia, I\u2019m talking rainbows, I\u2019m talking pixels. -=- What is a bug? A miserable little pile of code... or something more? Today we look at a curious quirk in how Mac OS displays images in PDFs. The case: an ordinary strip of colored squares has transformed into a smooth rainbow gradient. Can you channel your inner detective and solve the mystery? Blog Post:  https:\/\/www.userlandia.com\/home\/2021\/11\/the-mystery-of-mac-os-mangled-image-interpolation-implementation Published November 16, 2021 -=- Chapters -=- 00:00:00 - Intro 00:00:42 - When There's Something Strange... 00:03:42 - Layers of Quartz 00:09:43 - Resolving Power 00:14:06 - Objection! 00:17:37 - Interpolation Interpretation 00:23:53 - The Fix Is In 00:26:35 - The Final Cut 00:29:02 - Outtro -=- Links -=-  Color Scale Smoothing - Ars Technica Openforum - https:\/\/arstechnica.com\/civis\/viewtopic.php?f=19&amp;amp;t=1477509 generic-mapping-tools - http:\/\/generic-mapping-tools.org Quartz - https:\/\/arstechnica.com\/gadgets\/2000\/01\/macos-x-gui\/ Display PostScript -  http:\/\/www.nextcomputers.org\/NeXTfiles\/Docs\/NeXTStep\/3.3\/nd\/Concepts\/Pre3.0_Concepts\/04_Drawing.htmld\/index.html CoreGraphics - https:\/\/developer.apple.com\/documentation\/coregraphics Image Resolution and DPI - https:\/\/guides.lib.umich.edu\/c.php?g=282942&amp;amp;p=1888163 Matrix Transformations - https:\/\/personal.math.ubc.ca\/~cass\/graphics\/text\/old.pdf\/last\/ch4.pdf PostScript Level 3 Reference Guide - https:\/\/www.adobe.com\/content\/dam\/acom\/en\/devnet\/actionscript\/articles\/PLRM.pdf PDF Reference Guide v1.4 - https:\/\/www.adobe.com\/content\/dam\/acom\/en\/devnet\/pdf\/pdfs\/pdf_reference_archives\/PDFReference.pdf psscale - GMT - https:\/\/docs.generic-mapping-tools.org\/latest\/psscale.html?highlight=psscale Ace Attorney - https:\/\/en.wikipedia.org\/wiki\/Ace_Attorney  -=- Subscribe -=- Apple Podcasts: https:\/\/podcasts.apple.com\/us\/podcast\/userlandia\/id1588648631  Overcast: https:\/\/overcast.fm\/itunes1588648631\/userlandiaPocket Casts: &amp;nbsp; https:\/\/pca.st\/m4tegn1u Spotify:&amp;nbsp; https:\/\/open.spotify.com\/show\/79LO3vO9avAt3yCLpNWark  Google Podcasts:  https:\/\/podcasts.google.com\/feed\/aHR0cHM6Ly91c2VybGFuZGlhLmxpYnN5bi5jb20vcnNz -=- Contact Us -=- Follow Userlandia: @userlandia - http:\/\/twitter.com\/userlandiashow&amp;nbsp; &amp;nbsp;Follow Dan: @kefkafloyd -&amp;nbsp; http:\/\/twitter.com\/kefkafloyd Visit The Website: https:\/\/www.userlandia.com Email us: feedback@userlandia.comJoin The Userlandia Discord: https:\/\/discord.com\/invite\/z2jmF93 Theme Song by Space Vixen: https:\/\/spacevixenmusic.bandcamp.com Follow them on Twitter @SpaceVixenMusic: https:\/\/twitter.com\/spacevixenmusic Music Credits: Artist: Ron Gelinas Track Title: Gaining Momentum https:\/\/youtu.be\/RTRl0mD9Y8g Ace Attorney \u2014 Pressing Pursuit \u2014 Cornered - https:\/\/www.youtube.com\/watch?v=UxnvGDK0WGM Neonscapes by | e s c p | https:\/\/escp-music.bandcamp.com  Music promoted by https:\/\/www.free-stock-music.com  Attribution 4.0 International (CC BY 4.0) https:\/\/creativecommons.org\/licenses\/by\/4.0\/ Tokyo by | e s c p | https:\/\/escp-music.bandcamp.com  Music promoted by https:\/\/www.free-stock-music.com  Attribution 4.0 International (CC BY 4.0) https:\/\/creativecommons.org\/licenses\/by\/4.0\/ Dream Cruiser by Anders Enger Jensen - https:\/\/www.youtube.com\/watch?v=FalGOzjuG64 Retro Runner by Anders Enger Jensen - https:\/\/www.youtube.com\/watch?v=1l7fOHedd2I ","author_name":"Userlandia","author_url":"https:\/\/www.userlandia.com","html":"<iframe title=\"Libsyn Player\" style=\"border: none\" src=\"\/\/html5-player.libsyn.com\/embed\/episode\/id\/21155387\/height\/90\/theme\/custom\/thumbnail\/yes\/direction\/forward\/render-playlist\/no\/custom-color\/1c252c\/\" height=\"90\" width=\"600\" scrolling=\"no\"  allowfullscreen webkitallowfullscreen mozallowfullscreen oallowfullscreen msallowfullscreen><\/iframe>","thumbnail_url":"https:\/\/assets.libsyn.com\/secure\/content\/115541138"}