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improve chessboard contrast

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Signed-off-by: Trial97 <alexandru.tripon97@gmail.com>
This commit is contained in:
Trial97 2025-02-21 11:12:27 +02:00
parent 47af33ff6f
commit 6a2f5f071c
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GPG Key ID: 55EF5DA53DB36318
1 changed files with 6 additions and 30 deletions
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36
launcher/ui/dialogs/skins/draw/SkinOpenGLWindow.cpp
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@ -22,10 +22,9 @@
#include <QOpenGLBuffer>
#include <QVector2D>
#include <QVector3D>
#include <QtMath>
#include <cmath>
#include "minecraft/skins/SkinModel.h"
#include "rainbow.h"
#include "ui/dialogs/skins/draw/BoxGeometry.h"
#include "ui/dialogs/skins/draw/Scene.h"
@ -209,38 +208,15 @@ void SkinOpenGLWindow::updateCape(const QImage& cape)
}
}
QVector3D RGBToYCbCr(QColor rgb)
{
auto fr = rgb.redF() / 255.f;
auto fg = rgb.greenF() / 255.f;
auto fb = rgb.blueF() / 255.F;
auto Y = 0.2989f * fr + 0.5866f * fg + 0.1145f * fb;
auto Cb = -0.1687f * fr - 0.3313f * fg + 0.5000f * fb;
auto Cr = 0.5000f * fr - 0.4184f * fg - 0.0816f * fb;
return QVector3D(Y, Cb, Cr);
}
QColor YCbCrToRGB(QVector3D ycbcr)
{
auto r = qBound(0.0f, ycbcr.x() + 0.0000f * ycbcr.y() + 1.4022f * ycbcr.z(), 1.0f);
auto g = qBound(0.0f, ycbcr.x() - 0.3456f * ycbcr.y() - 0.7145f * ycbcr.z(), 1.0f);
auto b = qBound(0.0f, ycbcr.x() + 1.7710f * ycbcr.y() + 0.0000f * ycbcr.z(), 1.0f);
return QColor::fromRgb(r * 255, g * 255, b * 255);
}
QColor calculateContrastingColor(const QColor& color)
{
constexpr float contrast = 0.07;
auto lab = RGBToYCbCr(color);
if (lab.x() < contrast) {
lab.setX(lab.x() + contrast);
constexpr float contrast = 0.2;
auto luma = Rainbow::luma(color);
if (luma < 0.5) {
return Rainbow::lighten(color, contrast);
} else {
lab.setX(lab.x() - contrast);
return Rainbow::darken(color, contrast);
}
return YCbCrToRGB(lab);
}
QImage generateChessboardImage(int width, int height, int tileSize, QColor baseColor)