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[gpx] Save bookmark color to gpx export (#11238)

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* [gpx] Save bookmark color to gpx export
* [gpx] Code-review fixes
* [gpx] Use m_rgba to store initial color, reset on predefined color change
* [gpx] Move MapPredefinedColor to color parser
* [gpx] Adjust naming

Signed-off-by: cyber-toad <the.cyber.toad@proton.me>
This commit is contained in:
cyber-toad
2025-09-02 12:30:43 +02:00
committed by Konstantin Pastbin
parent bf79f7a95c
commit fd342c2a17
9 changed files with 186 additions and 69 deletions
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92
libs/kml/color_parser.cpp
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@@ -1,6 +1,7 @@
#include "color_parser.hpp"
#include "coding/hex.hpp"
#include "types.hpp"
#include "base/string_utils.hpp"
@@ -31,6 +32,97 @@ std::optional<uint32_t> ParseHexColor(std::string_view c)
}
}
std::tuple<int, int, int> ExtractRGB(uint32_t rgbaColor)
{
return {(rgbaColor >> 24) & 0xFF, (rgbaColor >> 16) & 0xFF, (rgbaColor >> 8) & 0xFF};
}
static int ColorDistance(uint32_t rgbaColor1, uint32_t rgbaColor2)
{
auto const [r1, g1, b1] = ExtractRGB(rgbaColor1);
auto const [r2, g2, b2] = ExtractRGB(rgbaColor2);
return (r1 - r2) * (r1 - r2) + (g1 - g2) * (g1 - g2) + (b1 - b2) * (b1 - b2);
}
struct RGBAToGarmin
{
uint32_t rgba;
std::string_view color;
};
auto constexpr kRGBAToGarmin = std::to_array<RGBAToGarmin>({{0x000000ff, "Black"},
{0x8b0000ff, "DarkRed"},
{0x006400ff, "DarkGreen"},
{0xb5b820ff, "DarkYellow"},
{0x00008bff, "DarkBlue"},
{0x8b008bff, "DarkMagenta"},
{0x008b8bff, "DarkCyan"},
{0xccccccff, "LightGray"},
{0x444444ff, "DarkGray"},
{0xff0000ff, "Red"},
{0x00ff00ff, "Green"},
{0xffff00ff, "Yellow"},
{0x0000ffff, "Blue"},
{0xff00ffff, "Magenta"},
{0x00ffffff, "Cyan"},
{0xffffffff, "White"}});
std::string_view MapGarminColor(uint32_t rgba)
{
std::string_view closestColor = kRGBAToGarmin[0].color;
auto minDistance = std::numeric_limits<int>::max();
for (auto const & [rgbaGarmin, color] : kRGBAToGarmin)
{
auto const distance = ColorDistance(rgba, rgbaGarmin);
if (distance == 0)
return color; // Exact match.
if (distance < minDistance)
{
minDistance = distance;
closestColor = color;
}
}
return closestColor;
}
struct RGBAToPredefined
{
uint32_t rgba;
PredefinedColor predefinedColor;
};
static std::array<RGBAToPredefined, kOrderedPredefinedColors.size()> buildRGBAToPredefined()
{
auto res = std::array<RGBAToPredefined, kOrderedPredefinedColors.size()>();
for (size_t i = 0; i < kOrderedPredefinedColors.size(); ++i)
res[i] = {ColorFromPredefinedColor(kOrderedPredefinedColors[i]).GetRGBA(), kOrderedPredefinedColors[i]};
return res;
}
auto const kRGBAToPredefined = buildRGBAToPredefined();
PredefinedColor MapPredefinedColor(uint32_t rgba)
{
auto closestColor = kRGBAToPredefined[0].predefinedColor;
auto minDistance = std::numeric_limits<int>::max();
for (auto const & [rgbaGarmin, color] : kRGBAToPredefined)
{
auto const distance = ColorDistance(rgba, rgbaGarmin);
if (distance == 0)
return color; // Exact match.
if (distance < minDistance)
{
minDistance = distance;
closestColor = color;
}
}
return closestColor;
}
// Garmin extensions spec: https://www8.garmin.com/xmlschemas/GpxExtensionsv3.xsd
// Color mapping: https://help.locusmap.eu/topic/extend-garmin-gpx-compatibilty
std::optional<uint32_t> ParseGarminColor(std::string_view c)