1 files changed, 89 insertions, 0 deletions
diff --git a/pdf/pdf_pattern.c b/pdf/pdf_pattern.c
new file mode 100644
index 00000000..7d3a38d1
--- /dev/null
+++ b/pdf/pdf_pattern.c
@@ -0,0 +1,89 @@
+#include "fitz.h"
+#include "mupdf.h"
+
+fz_error
+pdf_loadpattern(pdf_pattern **patp, pdf_xref *xref, fz_obj *dict)
+{
+	fz_error error;
+	pdf_pattern *pat;
+	fz_obj *obj;
+
+	if ((*patp = pdf_finditem(xref->store, pdf_droppattern, dict)))
+	{
+		pdf_keeppattern(*patp);
+		return fz_okay;
+	}
+
+	pdf_logrsrc("load pattern (%d %d R) {\n", fz_tonum(dict), fz_togen(dict));
+
+	pat = fz_malloc(sizeof(pdf_pattern));
+	pat->refs = 1;
+	pat->resources = nil;
+	pat->contents = nil;
+
+	/* Store pattern now, to avoid possible recursion if objects refer back to this one */
+	pdf_storeitem(xref->store, pdf_keeppattern, pdf_droppattern, dict, pat);
+
+	pat->ismask = fz_toint(fz_dictgets(dict, "PaintType")) == 2;
+	pat->xstep = fz_toreal(fz_dictgets(dict, "XStep"));
+	pat->ystep = fz_toreal(fz_dictgets(dict, "YStep"));
+
+	pdf_logrsrc("mask %d\n", pat->ismask);
+	pdf_logrsrc("xstep %g\n", pat->xstep);
+	pdf_logrsrc("ystep %g\n", pat->ystep);
+
+	obj = fz_dictgets(dict, "BBox");
+	pat->bbox = pdf_torect(obj);
+
+	pdf_logrsrc("bbox [%g %g %g %g]\n",
+		pat->bbox.x0, pat->bbox.y0,
+		pat->bbox.x1, pat->bbox.y1);
+
+	obj = fz_dictgets(dict, "Matrix");
+	if (obj)
+		pat->matrix = pdf_tomatrix(obj);
+	else
+		pat->matrix = fz_identity;
+
+	pdf_logrsrc("matrix [%g %g %g %g %g %g]\n",
+		pat->matrix.a, pat->matrix.b,
+		pat->matrix.c, pat->matrix.d,
+		pat->matrix.e, pat->matrix.f);
+
+	pat->resources = fz_dictgets(dict, "Resources");
+	if (pat->resources)
+		fz_keepobj(pat->resources);
+
+	error = pdf_loadstream(&pat->contents, xref, fz_tonum(dict), fz_togen(dict));
+	if (error)
+	{
+		pdf_removeitem(xref->store, pdf_droppattern, dict);
+		pdf_droppattern(pat);
+		return fz_rethrow(error, "cannot load pattern stream (%d %d R)", fz_tonum(dict), fz_togen(dict));
+	}
+
+	pdf_logrsrc("}\n");
+
+	*patp = pat;
+	return fz_okay;
+}
+
+pdf_pattern *
+pdf_keeppattern(pdf_pattern *pat)
+{
+	pat->refs ++;
+	return pat;
+}
+
+void
+pdf_droppattern(pdf_pattern *pat)
+{
+	if (pat && --pat->refs == 0)
+	{
+		if (pat->resources)
+			fz_dropobj(pat->resources);
+		if (pat->contents)
+			fz_dropbuffer(pat->contents);
+		fz_free(pat);
+	}
+}