From cd7184ef7f54f162bb9e7811caa6eb587de923f0 Mon Sep 17 00:00:00 2001
From: Brian Hawley <brian_hawley@yahoo.com>
Date: Mon, 29 Jan 2024 13:32:06 -0600
Subject: [PATCH] Remove base64 gem dependency

Inline the Base64 method code.

[Fixes #159]
---
 lib/prawn/svg/loaders/data.rb | 4 +---
 prawn-svg.gemspec             | 1 -
 2 files changed, 1 insertion(+), 4 deletions(-)

diff --git a/lib/prawn/svg/loaders/data.rb b/lib/prawn/svg/loaders/data.rb
index 146f7e4..c975e33 100644
--- a/lib/prawn/svg/loaders/data.rb
+++ b/lib/prawn/svg/loaders/data.rb
@@ -1,5 +1,3 @@
-require 'base64'
-
 module Prawn::SVG::Loaders
   class Data
     REGEXP = %r{\Adata:image/(png|jpeg|svg\+xml);base64(;[a-z0-9]+)*,}i
@@ -13,7 +11,7 @@ def from_url(url)
               'prawn-svg only supports base64-encoded image/png, image/jpeg, and image/svg+xml data URLs'
       end
 
-      Base64.decode64(matches.post_match)
+      matches.post_match.unpack1('m')
     end
   end
 end
diff --git a/prawn-svg.gemspec b/prawn-svg.gemspec
index 77fa63d..06fba2e 100644
--- a/prawn-svg.gemspec
+++ b/prawn-svg.gemspec
@@ -19,7 +19,6 @@ Gem::Specification.new do |gem|
 
   gem.required_ruby_version = '>= 2.5.0'
 
-  gem.add_runtime_dependency 'base64', '~> 0.1.0'
   gem.add_runtime_dependency 'css_parser', '~> 1.6'
   gem.add_runtime_dependency 'matrix', '~> 0.4.2'
   gem.add_runtime_dependency 'prawn', '>= 0.11.1', '< 3'