Ability to override pagesize

diff --git a/galgen.zsh b/galgen.zsh
index 83e5ba89b379ea70109a84ef3892696c1b06557c..8a9974009bd7ca12782a18d7be1dc745a69aefdc 100755 (executable)
--- a/galgen.zsh
+++ b/galgen.zsh
@@ -1,11 +1,11 @@
 #!/usr/bin/env zsh
 # Copyright (C) 2022-2023 Sergey Matveev <stargrave@stargrave.org>
 
+pagesize=${PAGESIZE:-100}
+
 set -e
 setopt EXTENDED_GLOB
 
-pagesize=100
-
 imgs=((*.jxl|*.webp~*.preview.webp)(Om))
 for (( i=1 ; i <= ${#imgs} ; i++ )) {
     local img=${imgs[$i]}