fix: media box (#157)

Signed-off-by: Peter Staar <[email protected]>

Author: PeterStaar-IBM

src/v2/pdf_resources/page_dimension.h

@@ -29,6 +29,10 @@ namespace pdflib
 
     std::pair<double, double> rotate(int angle);
 
+  private:
+
+    std::array<double, 4> normalize_page_boundaries(std::array<double, 4> bbox, std::string name);
+    
   private:
 
     bool                  initialised;
@@ -154,6 +158,33 @@ namespace pdflib
 
     return delta;
   }
+
+  std::array<double, 4> pdf_resource<PAGE_DIMENSION>::normalize_page_boundaries(std::array<double, 4> bbox, std::string name)
+  {
+    LOG_S(INFO) << __FUNCTION__;
+    
+    double llx = std::min(bbox[0], bbox[2]);
+    double lly = std::min(bbox[1], bbox[3]);
+    double urx = std::max(bbox[0], bbox[2]);
+    double ury = std::max(bbox[1], bbox[3]);
+
+    if(urx<llx)
+      {
+	LOG_S(ERROR) << "we have a malformed page-boundary for " << name << "-> llx: "<< llx << ", urx: "<< urx;
+      }
+
+    if(ury<lly)
+      {
+	LOG_S(ERROR) << "we have a malformed page-boundary for " << name << "-> lly: "<< lly << ", ury: "<< ury;
+      }    
+    
+    bbox[0] = llx;
+    bbox[1] = lly;
+    bbox[2] = urx;
+    bbox[3] = ury;
+
+    return bbox;
+  }
 
   bool pdf_resource<PAGE_DIMENSION>::init_from(nlohmann::json& data)
   {
@@ -324,6 +355,12 @@ namespace pdflib
         LOG_S(ERROR) << ss.str();
 	throw std::logic_error(ss.str());
       }
+
+    crop_bbox = normalize_page_boundaries(crop_bbox, "crop_bbox");
+    media_bbox = normalize_page_boundaries(media_bbox, "media_bbox");
+    art_bbox = normalize_page_boundaries(art_bbox, "art_bbox");
+    bleed_bbox = normalize_page_boundaries(bleed_bbox, "bleed_bbox");
+    trim_bbox = normalize_page_boundaries(trim_bbox, "trim_bbox");
   }
 
 }