diff options
Diffstat (limited to 'gs/base/gdevpdfx.h')
| -rw-r--r-- | gs/base/gdevpdfx.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/gs/base/gdevpdfx.h b/gs/base/gdevpdfx.h index ef1a2e293..bc834cf6d 100644 --- a/gs/base/gdevpdfx.h +++ b/gs/base/gdevpdfx.h @@ -166,6 +166,14 @@ typedef enum { * for synthesized fonts, rname is A, B, .... The string is null-terminated. */ + /* WARNING WILL ROBINSON! + * these 2 pointers may *look* like a double linked list but in fact these are pointers + * to two *different* single-linked lists. 'next' points to the next resource + * of this type, which is stored in the resource chains pointed to by the array + * 'resources' in the device structure. 'prev' is a pointer + * to the list of stored resources of all types, pointed to by the + * 'last_resource' member of the device structure. + */ #define pdf_resource_common(typ)\ typ *next; /* next resource of this type */\ pdf_resource_t *prev; /* previously allocated resource */\ @@ -257,6 +265,10 @@ struct pdf_article_s { /* ---------------- The device structure ---------------- */ /* Resource lists */ +/* We seem to split the resources up into 'NUM_RESOURCE_CHAINS' linked + * lists purely as a performance boost. Presumably it save searching very + * long lists. + */ #define NUM_RESOURCE_CHAINS 16 typedef struct pdf_resource_list_s { pdf_resource_t *chains[NUM_RESOURCE_CHAINS]; |