Fix #637

hhrutter · hhrutter · commit fd12f8b0f2e3 · 2023-07-05T15:01:50.000+02:00
diff --git a/pkg/pdfcpu/optimize.go b/pkg/pdfcpu/optimize.go
@@ -545,6 +545,14 @@ func optimizeXObjectResourcesDict(ctx *model.Context, rDict types.Dict, pageNumb
 				continue
 			}
 
+			indRef, ok := o.(types.IndirectRef)
+			if ok {
+				if visited(indRef, vis) {
+					continue
+				}
+				vis = append(vis, indRef)
+			}
+
 			if err := optimizeFormResources(ctx, o, pageNumber, pageObjNumber, vis); err != nil {
 				return err
 			}

Original file line number	Diff line number	Diff line change
`@@ -545,6 +545,14 @@ func optimizeXObjectResourcesDict(ctx *model.Context, rDict types.Dict, pageNumb`
`545`	`545`	`continue`
`546`	`546`	`}`
`547`	`547`
	`548`	`+ indRef, ok := o.(types.IndirectRef)`
	`549`	`+ if ok {`
	`550`	`+ if visited(indRef, vis) {`
	`551`	`+ continue`
	`552`	`+ }`
	`553`	`+ vis = append(vis, indRef)`
	`554`	`+ }`
	`555`	`+`
`548`	`556`	`if err := optimizeFormResources(ctx, o, pageNumber, pageObjNumber, vis); err != nil {`
`549`	`557`	`return err`
`550`	`558`	`}`