From c11d2aa6b0e2fd5166231d996943911d77390b91 Mon Sep 17 00:00:00 2001
From: sfan5 <sfan5@live.de>
Date: Sat, 24 Mar 2018 15:37:06 +0100
Subject: [PATCH] Re-add support for outdated libgd

---
 Image.cpp | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/Image.cpp b/Image.cpp
index b5f0f02..ca40c47 100644
--- a/Image.cpp
+++ b/Image.cpp
@@ -104,8 +104,19 @@ void Image::drawCircle(int x, int y, int diameter, const Color &c)
 void Image::save(const std::string &filename)
 {
 	const char *f = filename.c_str();
+#if (GD_MAJOR_VERSION == 2 && GD_MINOR_VERSION >= 1) || GD_MAJOR_VERSION > 2
 	if (gdSupportsFileType(f, 1) == GD_FALSE)
 		throw std::runtime_error("Image format not supported by gd");
 	if (gdImageFile(m_image, f) == GD_FALSE)
 		throw std::runtime_error("Error saving image");
+#else
+	FILE *file = fopen(f, "wb");
+	if(!file) {
+		std::ostringstream oss;
+		oss << "Error writing image file: " << std::strerror(errno);
+		throw std::runtime_error(oss.str());
+	}
+	gdImagePng(m_image, file);
+	fclose(file);
+#endif
 }