95 lines
2.6 KiB
C++
95 lines
2.6 KiB
C++
/*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/.
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*/
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#pragma once
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#include <vector>
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#include <string>
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#include <stdint.h>
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#include <ctime>
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#include <optional>
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#include <variant>
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namespace OpenVulkano::Image
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{
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struct RationalValue
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{
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uint32_t nominator;
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uint32_t denominator;
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RationalValue() : nominator(0), denominator(0) {}
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explicit RationalValue(float val) : nominator(val * 10000), denominator(10000) {}
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explicit RationalValue(double val) : nominator(val * 10000), denominator(10000) {}
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explicit RationalValue(uint32_t nominator, uint32_t denominator = 1) : nominator(nominator), denominator(denominator) {}
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operator bool() const { return nominator || denominator; }
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RationalValue& operator =(float val) { nominator = val * 10000; denominator = 10000; return *this; }
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RationalValue& operator =(uint32_t val) { nominator = val; denominator = 1; return *this; }
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RationalValue& operator =(const RationalValue& val) = default;
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};
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enum class LatitudeRef
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{
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NORTH,
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SOUTH,
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};
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enum class LongitudeRef
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{
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EAST,
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WEST,
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};
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enum class GPSTrackRef
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{
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TRUE_NORTH,
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MAGNETIC
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};
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struct GPSCoords
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{
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int32_t degrees, minutes, seconds;
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std::variant<LatitudeRef, LongitudeRef> ref;
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GPSCoords(float decimalDegrees, bool isLatitude);
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GPSCoords(int32_t degrees, int32_t minutes, int32_t seconds, LatitudeRef ref);
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GPSCoords(int32_t degrees, int32_t minutes, int32_t seconds, LongitudeRef ref);
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};
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struct GPSInfo
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{
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GPSCoords latitude = { 0, 0, 0, LatitudeRef::NORTH };
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GPSCoords longitude = { 0, 0, 0, LongitudeRef::EAST };
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bool altitudeIsAboveSeaLevel = true;
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uint32_t altitude = 0;
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GPSTrackRef trackRef = GPSTrackRef::TRUE_NORTH;
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float track = 0; // range is [0.0; 360.0)
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void SetAltitude(float level);
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};
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class ExifBuilder
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{
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public:
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int orientation = 0;
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std::string make;
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std::string model;
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RationalValue xResolution, yResolution;
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int resolutionUnit = 0;
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RationalValue exposureTime, fNumber, focalLength;
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std::string dateTaken; // format: yyyy:mm:dd hh:mm:ss
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std::string softwareUsed = "OpenVulkano";
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std::optional<GPSInfo> gpsInfo;
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void SetResolution(uint32_t dpi = 72) { xResolution = yResolution = dpi; resolutionUnit = 2;}
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void SetOrientation(float orientationRad);
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// Typical usage is -> jpeg_write_marker(cinfo, JPEG_APP0 + 1, exif_data.data(), exif_data.size());
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[[nodiscard]] std::vector<uint8_t> Build();
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[[nodiscard]] static std::string GetCurrentTimestamp();
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};
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}
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