More refactoring and duplicate code removal

1 files changed, 51 insertions, 0 deletions

diff --git a/src/openvic-simulation/utility/BMP.hpp b/src/openvic-simulation/utility/BMP.hpp
new file mode 100644
index 0000000..f04b41a
--- /dev/null
+++ b/src/openvic-simulation/utility/BMP.hpp
@@ -0,0 +1,51 @@
+#pragma once
+
+#include <cstdio>
+#include <vector>
+
+#include "openvic-simulation/types/Colour.hpp"
+
+namespace OpenVic {
+	class BMP {
+#pragma pack(push)
+#pragma pack(1)
+		struct header_t {
+			uint16_t signature;			// Signature: 0x4d42 (or 'B' 'M')
+			uint32_t file_size;			// File size in bytes
+			uint16_t reserved1;			// Not used
+			uint16_t reserved2;			// Not used
+			uint32_t offset;			// Offset to image data in bytes from beginning of file
+			uint32_t dib_header_size;	// DIB header size in bytes
+			int32_t width_px;			// Width of the image
+			int32_t height_px;			// Height of image
+			uint16_t num_planes;		// Number of colour planes
+			uint16_t bits_per_pixel;	// Bits per pixel
+			uint32_t compression;		// Compression type
+			uint32_t image_size_bytes;	// Image size in bytes
+			int32_t x_resolution_ppm;	// Pixels per meter
+			int32_t y_resolution_ppm;	// Pixels per meter
+			uint32_t num_colours;		// Number of colours
+			uint32_t important_colours; // Important colours
+		} header;
+#pragma pack(pop)
+
+		FILE* file = nullptr;
+		bool header_validated = false;
+		uint32_t palette_size = 0;
+		std::vector<colour_t> palette;
+
+	public:
+		static constexpr uint32_t PALETTE_COLOUR_SIZE = sizeof(colour_t);
+
+		BMP() = default;
+		~BMP();
+
+		bool open(char const* filepath);
+		bool read_header();
+		bool read_palette();
+		void close();
+		void reset();
+
+		std::vector<colour_t> const& get_palette() const;
+	};
+}