From fba96c808d25d2fc35ec63ee6745a1e55a95d707 Mon Sep 17 00:00:00 2001
From: Eugen Rochko <eugen@zeonfederated.com>
Date: Sat, 27 Apr 2019 03:24:09 +0200
Subject: Add blurhash (#10630)

* Add blurhash

* Use fallback color for spoiler when blurhash missing

* Federate the blurhash and accept it as long as it's at most 5x5

* Display unknown media attachments as blurhash placeholders

* Improve style of embed actions and spoiler button

* Change blurhash resolution from 3x3 to 4x4

* Improve dependency definitions

* Fix code style issues
---
 lib/paperclip/blurhash_transcoder.rb | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
 create mode 100644 lib/paperclip/blurhash_transcoder.rb

(limited to 'lib')

diff --git a/lib/paperclip/blurhash_transcoder.rb b/lib/paperclip/blurhash_transcoder.rb
new file mode 100644
index 000000000..08925a6dd
--- /dev/null
+++ b/lib/paperclip/blurhash_transcoder.rb
@@ -0,0 +1,16 @@
+# frozen_string_literal: true
+
+module Paperclip
+  class BlurhashTranscoder < Paperclip::Processor
+    def make
+      return @file unless options[:style] == :small
+
+      pixels   = convert(':source RGB:-', source: File.expand_path(@file.path)).unpack('C*')
+      geometry = options.fetch(:file_geometry_parser).from_file(@file)
+
+      attachment.instance.blurhash = Blurhash.encode(geometry.width, geometry.height, pixels, options[:blurhash] || {})
+
+      @file
+    end
+  end
+end
-- 
cgit