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[Onboarding] Draw the banner logo as a static gradient plate

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Replace the black/white logo tint switch with a ShaderEffect plate that
repaints the SVG's brand gradient (light AccentSoft -> dark AccentStrong
along the baked-in userSpaceOnUse axis) clipped to the full-color logo's
alpha silhouette, with the white highlight path overlaid on top — matching
the home widget's QPainter composite. The plate is static: no glow or
breathing. Brand colors flow from BannerShaderConfig's new brandStrong/
brandSoft pair instead of the removed logoDark flag, and the background
motifs get a touch more accent so the mark keeps its coloured surround.
This commit is contained in:
Lukas Brübach 2026-09-13 19:25:05 +02:00
parent 8641123f33
commit d7529e0c6a
6 changed files with 184 additions and 68 deletions
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73
cockatrice/src/interface/widgets/onboarding/shader_banner_widget.cpp
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@ -27,54 +27,84 @@ struct SuggestedColors
QColor colorB;
QColor accent;
QColor glowColor;
QColor brandStrong;
QColor brandSoft;
qreal vignetteMin = 0.62;
bool lightStage = false;
};
SuggestedColors suggestedBannerColors()
{
const QPalette &pal = qApp->palette();
const QColor window = pal.color(QPalette::Active, QPalette::Window);
const QColor highlight = pal.color(QPalette::Active, QPalette::Highlight);
if (!window.isValid() || !highlight.isValid()) {
return {
QColor(kFallbackColorA), QColor(kFallbackColorB), kCockatriceBrandGreen, QColor(Qt::white), 0.62, false};
// Identity accent: the theme's [AppColors] AccentStrong, which appColor()
// resolves to QPalette::Highlight when a theme doesn't pin AccentStrong.
// Reading bare Highlight ignored curated accent tokens (Plasma's violet
// vs Default's green) whenever a palette didn't set the role itself.
const QColor accentStrong = themeManager->appColor(AppColor::AccentStrong);
if (!window.isValid() || !accentStrong.isValid()) {
return {QColor(kFallbackColorA),
QColor(kFallbackColorB),
kCockatriceBrandGreen,
QColor(Qt::white),
kCockatriceBrandGreen,
QColor(0xC9, 0xFD, 0x62),
0.62};
}
// The theme's brand pair: AccentStrong is the deep green, AccentSoft the
// lime. These two appColors form the logo's "surrounding gradient" (deep
// core grading out to the soft, brand-toned glow) on both the banner and
// the home screen.
const QColor brandStrong = accentStrong;
const QColor brandSoft = themeManager->appColor(AppColor::AccentSoft);
// Dress the stage for the scheme so the banner never fights the
// surrounding window in either mode. Dark palettes keep the original
// quiet near-black stage (lightness 29 → 16) with the theme's window
// hue; light palettes get a pastel "frosted accent" treatment built from
// the Highlight hue instead of a plain near-white copy: a gentle mint
// wash that clearly belongs to the theme.
// the accent hue instead of a plain near-white copy: a coloured wash that
// clearly belongs to the theme.
const qreal luma = 0.299 * window.red() + 0.587 * window.green() + 0.114 * window.blue();
const bool lightStage = luma > 115.0;
if (lightStage) {
const int hue = highlight.hslHue();
const int hue = accentStrong.hslHue();
// Achromatic accents (grey) get a neutral near-white stage instead.
const int stageSat = hue < 0 ? 0 : 35;
const int stageSat = hue < 0 ? 0 : 64;
const int hueSafe = hue < 0 ? 0 : hue;
// Depth is what stops a light stage reading as a washed-out near-white
// copy of the page behind the banner: deepen the lower pastel band and
// raise saturation so the hue is clearly present while staying frosted.
auto pastel = [hueSafe, stageSat](int lightness) { return QColor::fromHsl(hueSafe, stageSat, lightness); };
// Brightness-lifted accent for additive glows: Highlight on a light
// stage must be mid-bright to read (the shipped light Highlight is a
// deep green that washes out additively against white).
const int accentLightness = qBound(120, highlight.lightness() + 70, 165);
const int accentSaturation = hue < 0 ? 0 : qMax(highlight.hslSaturation(), 140);
const QColor liftedAccent = hue < 0 ? highlight : QColor::fromHsl(hueSafe, accentSaturation, accentLightness);
// The centre glow uses the deep Highlight itself -- a coloured halo
// behind the dark logo instead of a white blowout.
return {pastel(247), pastel(231), liftedAccent, highlight, 0.88, true};
auto pastelLower = [hueSafe](int lightness) { return QColor::fromHsl(hueSafe, 76, lightness); };
// Brightness-lifted accent for additive glows: the raw accent on a
// light stage must be mid-bright to read instead of washing out, so
// lift lightness and saturation together.
const int accentLightness = qBound(158, accentStrong.lightness() + 82, 198);
const int accentSaturation = hue < 0 ? 0 : qMax(accentStrong.hslSaturation(), 180);
const QColor liftedAccent =
hue < 0 ? accentStrong : QColor::fromHsl(hueSafe, accentSaturation, accentLightness);
// The centre glow (and logo tint in QML) uses the deep accent itself:
// a coloured halo/fill behind the logo instead of a white or black one.
return {pastel(214), pastelLower(186), liftedAccent, accentStrong, brandStrong, brandSoft, 0.80};
}
// Dark stage: force the window hue down to the banner's curated darkness,
// scaling saturation away so chromatic palettes tint it without going
// muddy. White glow and the original strong vignette stay untouched.
// muddy. The accent is the bright, brand-driven tone (hue from the accent
// itself, never the -- often grey -- window), and it drives both the
// embers/fog and the logo glow so the mark tints like the light stage.
auto stage = [&window](int lightness) {
const int hue = window.hslHue();
const int saturation = hue < 0 ? 0 : qBound(0, qRound(window.hslSaturation() * (lightness / 40.0)), 255);
return QColor::fromHsl(hue, saturation, lightness);
};
return {stage(29), stage(16), QColor(highlight), QColor(Qt::white), 0.62, false};
const int accentHue = accentStrong.hslHue();
const int accentHueSafe = accentHue < 0 ? 0 : accentHue;
const int accentLightness = qBound(150, accentStrong.lightness() + 70, 185);
const int accentSaturation = accentHue < 0 ? 0 : qMax(accentStrong.hslSaturation(), 160);
const QColor accent =
accentHue < 0 ? accentStrong : QColor::fromHsl(accentHueSafe, accentSaturation, accentLightness);
return {stage(29), stage(16), accent, accent, brandStrong, brandSoft, 0.62};
}
} // namespace
@ -273,8 +303,9 @@ void BannerHost::applyThemeColors()
config->setColorB(bannerColorB);
config->setAccent(bannerAccent);
config->setGlowColor(colors.glowColor);
config->setBrandStrong(colors.brandStrong);
config->setBrandSoft(colors.brandSoft);
config->setVignetteMin(colors.vignetteMin);
config->setLogoDark(colors.lightStage);
}
}