PNM image loader + tests

openVulkanoCpp/Image/ImageLoaderPnm.hpp

@@ -0,0 +1,32 @@
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+#pragma once
+
+#include "Image/ImageLoader.hpp"
+
+namespace OpenVulkano::Image
+{
+	struct PnmHeader
+	{
+		char magic = 0; // 1 for P1, 2 for P2 etc
+		int width = 0;
+		int height = 0;
+		int maxVal = 255; // Only used for formats P2, P3, P5, P6
+	};
+
+	class ImageLoaderPnm : public IImageLoader
+	{
+	public:
+		std::unique_ptr<Image> loadFromFile(const std::string& filePath) override;
+		std::unique_ptr<Image> loadFromMemory(const std::vector<uint8_t>& buffer) override;
+		Math::Vector2i GetImageDimensions(const std::string& filename) override;
+
+	private:
+		PnmHeader parseHeader(std::istream& stream);
+		Array<uint8_t> readBinaryData(std::istream& stream, const PnmHeader& header);
+		Array<uint8_t> readTextData(std::istream& stream, const PnmHeader& header);
+	};
+}