build(deps): bump github.com/kovidgoyal/imaging from 1.8.18 to 1.8.19

Bumps [github.com/kovidgoyal/imaging](https://github.com/kovidgoyal/imaging) from 1.8.18 to 1.8.19.
- [Release notes](https://github.com/kovidgoyal/imaging/releases)
- [Commits](https://github.com/kovidgoyal/imaging/compare/v1.8.18...v1.8.19)

---
updated-dependencies:
- dependency-name: github.com/kovidgoyal/imaging
  dependency-version: 1.8.19
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

go.mod

@@ -47,7 +47,7 @@ require (
 	github.com/jellydator/ttlcache/v3 v3.4.0
 	github.com/jinzhu/now v1.1.5
 	github.com/justinas/alice v1.2.0
-	github.com/kovidgoyal/imaging v1.8.18
+	github.com/kovidgoyal/imaging v1.8.19
 	github.com/leonelquinteros/gotext v1.7.2
 	github.com/libregraph/idm v0.5.0
 	github.com/libregraph/lico v0.66.0

go.sum

@@ -745,8 +745,8 @@ github.com/kovidgoyal/go-parallel v1.1.1 h1:1OzpNjtrUkBPq3UaqrnvOoB2F9RttSt811ui
 github.com/kovidgoyal/go-parallel v1.1.1/go.mod h1:BJNIbe6+hxyFWv7n6oEDPj3PA5qSw5OCtf0hcVxWJiw=
 github.com/kovidgoyal/go-shm v1.0.0 h1:HJEel9D1F9YhULvClEHJLawoRSj/1u/EDV7MJbBPgQo=
 github.com/kovidgoyal/go-shm v1.0.0/go.mod h1:Yzb80Xf9L3kaoB2RGok9hHwMIt7Oif61kT6t3+VnZds=
-github.com/kovidgoyal/imaging v1.8.18 h1:42JCqJnQBzBo0hGllLEJVYDARWXPP9MT3HgiTno9Chc=
-github.com/kovidgoyal/imaging v1.8.18/go.mod h1:bqjHpeAxSuTLvKob6HuqAr9td2wP9G54Snbgd+1QLoU=
+github.com/kovidgoyal/imaging v1.8.19 h1:zWJdQqF2tfSKjvoB7XpLRhVGbYsze++M0iaqZ4ZkhNk=
+github.com/kovidgoyal/imaging v1.8.19/go.mod h1:I0q8RdoEuyc4G8GFOF9CaluTUHQSf68d6TmsqpvfRI8=
 github.com/kr/fs v0.1.0/go.mod h1:FFnZGqtBN9Gxj7eW1uZ42v5BccTP0vu6NEaFoC2HwRg=
 github.com/kr/logfmt v0.0.0-20140226030751-b84e30acd515/go.mod h1:+0opPa2QZZtGFBFZlji/RkVcI2GknAs/DXo4wKdlNEc=
 github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=

vendor/github.com/kovidgoyal/imaging/animation.go

@@ -163,15 +163,20 @@ func (self *Image) populate_from_gif(g *gif.GIF) {
 			Delay: gifmeta.CalculateFrameDelay(g.Delay[i], min_gap),
 		}
 		switch prev_disposal {
-		case gif.DisposalNone, 0:
+		case gif.DisposalNone, 0: // 1
 			frame.ComposeOnto = frame.Number - 1
-		case gif.DisposalPrevious:
+		case gif.DisposalPrevious: // 3
 			frame.ComposeOnto = prev_compose_onto
-		case gif.DisposalBackground:
-			// this is in contravention of the GIF spec but browsers and
-			// gif2apng both do this, so follow them. Test image for this
-			// is apple.gif
-			frame.ComposeOnto = frame.Number - 1
+		case gif.DisposalBackground: // 2
+			if i > 0 && g.Delay[i-1] == 0 {
+				// this is in contravention of the GIF spec but browsers and
+				// gif2apng both do this, so follow them. Test images for this
+				// are apple.gif and disposal-background-with-delay.gif
+				frame.ComposeOnto = frame.Number - 1
+			} else {
+				// delay present, frame visible, so clear to background as the spec requires
+				frame.ComposeOnto = 0
+			}
 		}
 		prev_disposal, prev_compose_onto = g.Disposal[i], frame.ComposeOnto
 		self.Frames = append(self.Frames, &frame)

vendor/github.com/kovidgoyal/imaging/publish.py

@@ -5,7 +5,7 @@ import os
 import subprocess
 
 
-VERSION = "1.8.18"
+VERSION = "1.8.19"
 
 
 def run(*args: str):

vendor/modules.txt

@@ -894,7 +894,7 @@ github.com/kovidgoyal/go-parallel
 # github.com/kovidgoyal/go-shm v1.0.0
 ## explicit; go 1.24.0
 github.com/kovidgoyal/go-shm
-# github.com/kovidgoyal/imaging v1.8.18
+# github.com/kovidgoyal/imaging v1.8.19
 ## explicit; go 1.24.0
 github.com/kovidgoyal/imaging
 github.com/kovidgoyal/imaging/apng