generate default signature initials from font

2024-02-17 00:26:24 +02:00
parent 2f7a4fb2b3
commit ff9e415823
4 changed files with 80 additions and 18 deletions
@@ -0,0 +1,31 @@
+# frozen_string_literal: true
+
+module Submitters
+  module GenerateFontImage
+    WIDTH = 3000
+    HEIGHT = 160
+
+    FONTS = {
+      'Dancing Script Regular' => '/fonts/DancingScript-Regular.otf',
+      'Go Noto Kurrent-Bold Bold' => '/fonts/GoNotoKurrent-Bold.ttf'
+    }.freeze
+
+    FONT_ALIASES = {
+      'initials' => 'Go Noto Kurrent-Bold Bold',
+      'signature' => 'Dancing Script Regular'
+    }.freeze
+
+    module_function
+
+    def call(text, font: nil)
+      font = FONT_ALIASES[font] || font
+
+      text_image = Vips::Image.text(text, font:, fontfile: FONTS[font],
+                                          width: WIDTH, height: HEIGHT, wrap: :none)
+
+      text_mask = Vips::Image.black(text_image.width, text_image.height)
+
+      text_mask.bandjoin(text_image).copy(interpretation: :b_w).write_to_buffer('.png')
+    end
+  end
+end