Lunasvg diff

.diff

diff --git a/example/CMakeLists.txt b/example/CMakeLists.txt
index 53ec5ef..25f4bd9 100644
--- a/example/CMakeLists.txt
+++ b/example/CMakeLists.txt
@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.3)
 
-set(CMAKE_CXX_STANDARD 14)
+set(CMAKE_CXX_STANDARD 17)
 
 project(svg2png CXX)
 
diff --git a/example/svg2png.cpp b/example/svg2png.cpp
index f9c33d7..8f26807 100644
--- a/example/svg2png.cpp
+++ b/example/svg2png.cpp
@@ -3,6 +3,8 @@
 
 #include <iostream>
 #include <sstream>
+#include <filesystem>
+#include <fstream>
 
 #include <lunasvg.h>
 
@@ -48,7 +50,16 @@ int main(int argc, char** argv)
     std::uint32_t bgColor = 0x00000000;
     if(!setup(argc, argv, filename, width, height, bgColor)) return help();
 
-    auto document = Document::loadFromFile(filename);
+    std::uintmax_t size = std::filesystem::file_size(argv[1]);
+    std::fstream f1;
+    f1.open(argv[1], std::ios::in | std::ios::binary);
+    char* buffer = (char*)calloc(size, sizeof(char));
+    f1.read(buffer, size);
+    f1.close();
+
+    auto document = Document::loadFromData(buffer, size);
+    free(buffer);
+
     if(!document) return help();
 
     auto bitmap = document->renderToBitmap(width, height, bgColor);