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fix(skin-preview): smoother chessboard background contrast (#4534)

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This commit is contained in:
Alexandru Ionut Tripon
2025-12-20 18:51:04 +02:00
committed by GitHub
parent 5c6c92f286 42b72d676c
commit d3f59a8a43
1 changed files with 9 additions and 4 deletions
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13
launcher/ui/dialogs/skins/draw/SkinOpenGLWindow.cpp
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@@ -23,6 +23,7 @@
#include <QVector2D> #include <QVector2D>
#include <QVector3D> #include <QVector3D>
#include <QtMath> #include <QtMath>
#include <functional>
#include "minecraft/skins/SkinModel.h" #include "minecraft/skins/SkinModel.h"
#include "rainbow.h" #include "rainbow.h"
@@ -270,11 +271,12 @@ void SkinOpenGLWindow::updateCape(const QImage& cape)
QColor calculateContrastingColor(const QColor& color) QColor calculateContrastingColor(const QColor& color)
{ {
constexpr float contrast = 0.2;
auto luma = Rainbow::luma(color); auto luma = Rainbow::luma(color);
if (luma < 0.5) { if (luma < 0.5) {
constexpr float contrast = 0.05;
return Rainbow::lighten(color, contrast); return Rainbow::lighten(color, contrast);
} else { } else {
constexpr float contrast = 0.2;
return Rainbow::darken(color, contrast); return Rainbow::darken(color, contrast);
} }
} }
@@ -282,11 +284,14 @@ QColor calculateContrastingColor(const QColor& color)
QImage generateChessboardImage(int width, int height, int tileSize, QColor baseColor) QImage generateChessboardImage(int width, int height, int tileSize, QColor baseColor)
{ {
QImage image(width, height, QImage::Format_RGB888); QImage image(width, height, QImage::Format_RGB888);
auto white = baseColor; bool isDarkBase = Rainbow::luma(baseColor) < 0.5;
auto black = calculateContrastingColor(baseColor); float contrast = isDarkBase ? 0.05 : 0.45;
auto contrastFunc = std::bind(isDarkBase ? Rainbow::lighten : Rainbow::darken, std::placeholders::_1, contrast, 1.0);
auto white = contrastFunc(baseColor);
auto black = contrastFunc(calculateContrastingColor(baseColor));
for (int y = 0; y < height; ++y) { for (int y = 0; y < height; ++y) {
for (int x = 0; x < width; ++x) { for (int x = 0; x < width; ++x) {
bool isWhite = ((x / tileSize) % 2) == ((y / tileSize) % 2); bool isWhite = ((x / tileSize) + (y / tileSize)) % 2 == 0;
image.setPixelColor(x, y, isWhite ? white : black); image.setPixelColor(x, y, isWhite ? white : black);
} }
} }