Merge pull request #141 from xfalcox/animated_for_webp_and_avif

FEATURE: Adds animated? support for webp and avif images

CHANGELOG

@@ -1,3 +1,9 @@
+Version 2.2.7
+
+23-May-2023
+
+- FEATURE: Adds animated? support for webp and avif images
+
 Version 2.2.6
 
 16-December-2021

lib/fastimage.rb

@@ -435,7 +435,7 @@ class FastImage
 
   def parse_animated
     @type = parse_type unless @type
-    @type == :gif ? send("parse_animated_for_#{@type}") : nil
+    %i(gif webp avif).include?(@type) ? send("parse_animated_for_#{@type}") : nil
   end
 
   def fetch_using_base64(uri)
@@ -551,6 +551,8 @@ class FastImage
         case @stream.peek(12)[4..-1]
         when "ftypavif"
           :avif
+        when "ftypavis"
+          :avif
         when "ftypheic"
           :heic
         when "ftypmif1"
@@ -1092,4 +1094,24 @@ class FastImage
     gif = Gif.new(@stream)
     gif.animated?
   end
+
+  def parse_animated_for_webp
+    vp8 = @stream.read(16)[12..15]
+    _len = @stream.read(4).unpack("V")
+    case vp8
+    when "VP8 "
+      false
+    when "VP8L"
+      false
+    when "VP8X"
+      flags = @stream.read(4).unpack("C")[0]
+      flags & 2 > 0
+    else
+      nil
+    end
+  end
+
+  def parse_animated_for_avif
+    @stream.peek(12)[4..-1] == "ftypavis"
+  end
 end

lib/fastimage/version.rb

@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 class FastImage
-  VERSION = '2.2.6'
+  VERSION = '2.2.7'
 end

test/test.rb

@@ -34,6 +34,7 @@ GoodFixtures = {
   "webp_vp8x.webp" => [:webp, [386, 395]],
   "webp_vp8l.webp" => [:webp, [386, 395]],
   "webp_vp8.webp" => [:webp, [550, 368]],
+  "webp_animated.webp" => [:webp, [400, 400]],
   "test.svg" => [:svg, [200, 300]],
   "test_partial_viewport.svg" => [:svg, [860, 400]],
   "test2.svg" => [:svg, [366, 271]],
@@ -53,6 +54,7 @@ GoodFixtures = {
   "avif/hato.avif" => [:avif, [3082, 2048]],
   "avif/fox.avif" => [:avif, [1204, 799]],
   "avif/kimono.avif" => [:avif, [722, 1024]],
+  "avif/red_green_flash.avif" => [:avif, [256, 256]],
 }
 
 BadFixtures = [
@@ -124,6 +126,10 @@ class FastImageTest < Test::Unit::TestCase
     assert_equal false, FastImage.animated?(TestUrl + "test.gif")
     assert_equal true, FastImage.animated?(TestUrl + "animated.gif")
     assert_equal true, FastImage.animated?(TestUrl + "animated_without_gct.gif")
+    assert_equal false, FastImage.animated?(TestUrl + "webp_vp8x.webp")
+    assert_equal true, FastImage.animated?(TestUrl + "webp_animated.webp")
+    assert_equal false, FastImage.animated?(TestUrl + "avif/hato.avif")
+    assert_equal true, FastImage.animated?(TestUrl + "avif/red_green_flash.avif")
   end
 
   def test_should_return_nil_on_fetch_failure