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#pragma once
#include <filesystem>
#include <fstream>
#include <vector>
#include "openvic-simulation/types/Colour.hpp"
namespace OpenVic {
namespace fs = std::filesystem;
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)
public:
using palette_colour_t = uint32_t;
private:
std::ifstream file;
bool header_validated = false, palette_read = false, pixel_data_read = false;
uint32_t palette_size = 0;
std::vector<palette_colour_t> palette;
std::vector<uint8_t> pixel_data;
public:
static constexpr uint32_t PALETTE_COLOUR_SIZE = sizeof(palette_colour_t);
BMP() = default;
~BMP();
bool open(fs::path const& filepath);
bool read_header();
bool read_palette();
bool read_pixel_data();
void close();
void reset();
int32_t get_width() const;
int32_t get_height() const;
uint16_t get_bits_per_pixel() const;
std::vector<palette_colour_t> const& get_palette() const;
std::vector<uint8_t> const& get_pixel_data() const;
};
}
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