@@ -116,6 +116,8 @@ static void ModificationDate_cb(struct pdf_struct *, struct pdf_obj *, struct pd

 static void Title_cb(struct pdf_struct *, struct pdf_obj *, struct pdf_action *);

 static void Subject_cb(struct pdf_struct *, struct pdf_obj *, struct pdf_action *);

 static void Keywords_cb(struct pdf_struct *, struct pdf_obj *, struct pdf_action *);

+static void Pages_cb(struct pdf_struct *, struct pdf_obj *, struct pdf_action *);

+static void Colors_cb(struct pdf_struct *pdf, struct pdf_obj *obj, struct pdf_action *act);

 /* End PDF statistics callbacks and related */

 static int xrefCheck(const char *xref, const char *eof)

@@ -1409,7 +1411,9 @@ static struct pdfname_action pdfname_actions[] = {

     {"Creator", OBJ_DICT, STATE_NONE, STATE_NONE, Creator_cb},

     {"Title", OBJ_DICT, STATE_NONE, STATE_NONE, Title_cb},

     {"Keywords", OBJ_DICT, STATE_NONE, STATE_NONE, Keywords_cb},

-    {"Subject", OBJ_DICT, STATE_NONE, STATE_NONE, Subject_cb}

+    {"Subject", OBJ_DICT, STATE_NONE, STATE_NONE, Subject_cb},

+    {"Pages", OBJ_DICT, STATE_NONE, STATE_NONE, Pages_cb},

+    {"Colors", OBJ_DICT, STATE_NONE, STATE_NONE, Colors_cb}

 };

 #define KNOWN_FILTERS ((1 << OBJ_FILTER_AH) | (1 << OBJ_FILTER_RL) | (1 << OBJ_FILTER_A85) | (1 << OBJ_FILTER_FLATE) | (1 << OBJ_FILTER_LZW) | (1 << OBJ_FILTER_FAX) | (1 << OBJ_FILTER_DCT) | (1 << OBJ_FILTER_JPX) | (1 << OBJ_FILTER_CRYPT))

@@ -3399,6 +3403,59 @@ static void Subject_cb(struct pdf_struct *pdf, struct pdf_obj *obj, struct pdf_a

 #endif

 }

+static void Pages_cb(struct pdf_struct *pdf, struct pdf_obj *obj, struct pdf_action *act)

+{

+#if HAVE_JSON

+#endif

+}

+

+static void Colors_cb(struct pdf_struct *pdf, struct pdf_obj *obj, struct pdf_action *act)

+{

+#if HAVE_JSON

+    json_object *colorsobj, *pdfobj;

+    unsigned long ncolors;

+    char *start, *p1;

+    size_t objsz = obj_size(pdf, obj, 1);

+

+    if (!(pdf) || !(pdf->ctx) || !(pdf->ctx->wrkproperty))

+        return;

+

+    start = obj->start + pdf->map;

+

+    p1 = cli_memstr(start, objsz, "/Colors", 7);

+    if (!(p1))

+        return;

+

+    p1 += 7;

+

+    /* Ensure that we have at least one whitespace character plus at least one number */

+    if (objsz - (p1 - start) < 2)

+        return;

+

+    while (p1 - start < objsz && isspace(p1[0]))

+        p1++;

+

+    if (p1 - start == objsz)

+        return;

+

+    ncolors = strtoul(p1, NULL, 10);

+

+    /* We only care if the number of colors > 2**24 */

+    if (ncolors < 1<<24)

+        return;

+

+    pdfobj = cli_jsonobj(pdf->ctx->wrkproperty, "PDFStats");

+    if (!(pdfobj))

+        return;

+

+    colorsobj = cli_jsonarray(pdfobj, "BigColors");

+    if (!(colorsobj))

+        return;

+

+    cli_jsonint_array(colorsobj, obj->id>>8);

+#endif

+}

+

 static void print_pdf_stats(struct pdf_struct *pdf)

 {

     if (!(pdf))