Define CAIRO_FORMAT_INVALID for old Cairo versions

Fixes Automattic#1067 Fixes Automattic#1039 Fixes Automattic#1012?
zbjornson · Dec 27, 2017 · 6345b0e · 6345b0e
1 parent f264460
commit 6345b0e
Showing 1 changed file with 8 additions and 1 deletion.
diff --git a/src/backend/Backend.h b/src/backend/Backend.h
@@ -50,7 +50,14 @@ class Backend : public Nan::ObjectWrap
     virtual void setHeight(int height);
 
     // Overridden by ImageBackend. SVG and PDF thus always return INVALID.
-    virtual cairo_format_t getFormat() { return CAIRO_FORMAT_INVALID; }
+    virtual cairo_format_t getFormat() {
+#ifndef CAIRO_FORMAT_INVALID
+      // For old Cairo (CentOS) support
+      return static_cast<cairo_format_t>(-1);
+#else
+      return CAIRO_FORMAT_INVALID;
+#endif
+    }
 };