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Cockatrice/tests/theme_migration/icon_tint_preview_test.cpp
Lukas Brübach 0aa0407f16 [Icons] Add an Informational semantic color family 
Face-down play and the exile zone are states that are neither a gain nor a
loss, and the pre-#7595 art painted them blue (arrow_right_blue). #7595 dropped
that hue, and the icon engine has had only Positive and Negative since, so both
states fall back to neutral ink.

Add the family with the same three-level ladder the other semantic roles use:
authored roles per theme, scheme defaults otherwise, an emphasis mapping, the
palette-editor rows and the generator seed. The defaults clear the 4.5:1 label
floor on both schemes and the ladder's saturation ordering; the existing
emphasis, hue and preview tests now cover the new family. Preview sheets that
name roles resolve an unauthored one through the same default the client
paints.
2026-11-08 20:07:46 +01:00

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#include "interface/theme_config.h"
#include "libcockatrice/utility/svg_recolor.h"
#include <QApplication>
#include <QByteArray>
#include <QColor>
#include <QDir>
#include <QFile>
#include <QFont>
#include <QGuiApplication>
#include <QImage>
#include <QPainter>
#include <QPalette>
#include <QPixmap>
#include <QPointF>
#include <QSize>
#include <QStringList>
#include <QStringLiteral>
#include <QSvgRenderer>
#include <gtest/gtest.h>
#include <iterator>
namespace
{
/**
* @brief Creates the GUI application QPixmap needs, using the offscreen plugin.
*
* The theme-migration binary is headless; creating this lazily keeps the other
* test files free of a display dependency.
*/
void ensureGuiApplication()
{
static int argc = 1;
static char name[] = "icon_tint_preview_test";
static char *argv[] = {name, nullptr};
// Leaked on purpose: a function-local static QApplication is destroyed before Qt's
// own library statics at exit, and the network module's destructors then run
// against a torn-down QObject layer (SEGV under AddressSanitizer).
static QApplication *app = new QApplication(argc, argv);
Q_UNUSED(app);
}
QString resourcesDir()
{
return QDir(QStringLiteral(COCKATRICE_SOURCE_DIR)).absoluteFilePath(QStringLiteral("cockatrice/resources"));
}
/** @brief Reads an authored icon from the theme resource directory. */
QByteArray readIconSvg(const char *name)
{
QFile file(QDir(resourcesDir()).absoluteFilePath(QStringLiteral("icons/%1.svg").arg(QString::fromLatin1(name))));
if (!file.open(QFile::ReadOnly)) {
return {};
}
return file.readAll();
}
/** @brief Renders a pixmap at device size and tags it with the ratio. */
template <typename Render> QPixmap renderAtDpr(const QSize &logicalSize, qreal dpr, Render &&render)
{
QPixmap pixmap = render(logicalSize * dpr);
pixmap.setDevicePixelRatio(dpr);
return pixmap;
}
} // namespace
/**
* @brief Writes one semantic-tint sheet per shipped palette theme.
*
* The theme files are the only place the shipped tones live, so each sheet is
* rendered from the palette the theme actually ships: all three semantic
* families, three glyphs each, at the two sizes the UI uses, on the window and
* button surfaces the contrast is measured against. A disabled row closes each
* family so the enabled/disabled order is visible next to the tone that carries
* it. A theme that does not author Informational falls back to the scheme
* default, which is what the client paints.
*/
TEST(IconTintPreview, WritesOneSheetPerShippedTheme)
{
const QString outDir = qEnvironmentVariable("COCKATRICE_ICON_PREVIEW_DIR");
if (outDir.isEmpty()) {
GTEST_SKIP() << "set COCKATRICE_ICON_PREVIEW_DIR to write the preview PNGs";
}
ensureGuiApplication();
ASSERT_TRUE(QDir().mkpath(outDir));
constexpr int MARGIN = 24;
constexpr int LABEL_WIDTH = 190;
constexpr int SLOT = 36;
constexpr int ROW_HEIGHT = 56;
constexpr int PANEL_TITLE = 26;
constexpr int PANEL_PADDING = 12;
constexpr qreal DPR = 2.0;
constexpr int SIZES[] = {16, 24};
struct Family
{
const char *name;
AppColor::Role role;
const char *glyphs[3];
};
const QList<Family> families = {
{"Positive", AppColor::Positive, {"increment", "ready_start", "arrow_up"}},
{"Negative", AppColor::Negative, {"decrement", "not_ready_start", "remove_row"}},
{"Informational", AppColor::Informational, {"arrow_right", "view", "arrow_to_top"}},
};
const QStringList themes = {
QStringLiteral("Fabric"), QStringLiteral("Fusion"), QStringLiteral("Leather"),
QStringLiteral("Plasma"), QStringLiteral("VelvetMarble"),
};
const auto renderLine = [](const QByteArray &svg, const QColor &ink, const QSize &size) {
QSvgRenderer renderer(resolveSvgColorSentinel(svg, ink.name(QColor::HexRgb).toLatin1()));
QPixmap pixmap(size);
pixmap.fill(Qt::transparent);
QPainter painter(&pixmap);
painter.setRenderHint(QPainter::Antialiasing, true);
renderer.render(&painter);
return pixmap;
};
const int glyphCount = static_cast<int>(std::size(families.first().glyphs));
const int columnCount = glyphCount * static_cast<int>(std::size(SIZES));
const int panelWidth = LABEL_WIDTH + columnCount * SLOT + PANEL_PADDING;
const int panelHeight = PANEL_TITLE + static_cast<int>(families.size()) * 2 * ROW_HEIGHT + PANEL_PADDING;
const int logicalWidth = 2 * MARGIN + panelWidth;
const int logicalHeight = MARGIN + 30 + 2 * (panelHeight + 24) + MARGIN;
for (const QString &theme : themes) {
for (const bool dark : {false, true}) {
const QString file =
QDir(QStringLiteral(COCKATRICE_SOURCE_DIR))
.absoluteFilePath(QStringLiteral("cockatrice/themes/%1/palette-default-%2.toml")
.arg(theme, dark ? QStringLiteral("dark") : QStringLiteral("light")));
const PaletteConfig config = PaletteConfig::fromFile(file);
ASSERT_TRUE(config.hasPalette()) << theme.toStdString();
const QPalette palette = config.apply(QPalette());
const QColor window = palette.color(QPalette::Active, QPalette::Window);
const QColor button = palette.color(QPalette::Active, QPalette::Button);
const QColor text = palette.color(QPalette::Active, QPalette::WindowText);
const QColor disabled = palette.color(QPalette::Disabled, QPalette::WindowText);
QImage image(QSize(qRound(logicalWidth * DPR), qRound(logicalHeight * DPR)),
QImage::Format_ARGB32_Premultiplied);
image.fill(window);
QPainter painter(&image);
painter.setRenderHint(QPainter::Antialiasing, true);
painter.setRenderHint(QPainter::SmoothPixmapTransform, true);
painter.scale(DPR, DPR);
painter.setPen(text);
painter.setFont(QFont(QStringLiteral("Sans"), 10, QFont::DemiBold));
painter.drawText(QPointF(MARGIN, MARGIN),
QStringLiteral("%1 — %2 scheme, semantic tints")
.arg(theme, dark ? QStringLiteral("dark") : QStringLiteral("light")));
struct Surface
{
const char *name;
QColor background;
};
const QList<Surface> surfaces = {
{"Window surface", window},
{"Button surface", button},
};
qreal panelTop = MARGIN + 30;
for (const Surface &surface : surfaces) {
painter.setPen(Qt::NoPen);
painter.setBrush(surface.background);
painter.drawRoundedRect(QRectF(MARGIN, panelTop, panelWidth, panelHeight), 8, 8);
const qreal contentLeft = MARGIN + PANEL_PADDING;
painter.setPen(text);
painter.setFont(QFont(QStringLiteral("Sans"), 9, QFont::DemiBold));
painter.drawText(QPointF(contentLeft, panelTop + 18), QString::fromLatin1(surface.name));
painter.setFont(QFont(QStringLiteral("Sans"), 8));
for (std::size_t sizeIndex = 0; sizeIndex < std::size(SIZES); ++sizeIndex) {
const qreal x = contentLeft + LABEL_WIDTH + static_cast<qreal>(sizeIndex) * glyphCount * SLOT;
painter.drawText(QPointF(x, panelTop + PANEL_TITLE + 14),
QStringLiteral("%1 px").arg(SIZES[sizeIndex]));
}
qreal y = panelTop + PANEL_TITLE + 20;
for (const Family &family : families) {
const QColor tone = config.appColors.value(family.role, defaultAppColor(family.role, dark));
ASSERT_TRUE(tone.isValid()) << theme.toStdString() << " " << family.name;
for (int state = 0; state < 2; ++state) {
const bool isDisabled = state == 1;
const QColor ink = isDisabled ? disabled : tone;
painter.setPen(text);
painter.setFont(QFont(QStringLiteral("Sans"), 8, QFont::DemiBold));
painter.drawText(
QPointF(contentLeft, y + 14),
QStringLiteral("%1%2").arg(QString::fromLatin1(family.name),
isDisabled ? QStringLiteral(" / disabled") : QString()));
painter.setFont(QFont(QStringLiteral("Mono"), 7));
painter.drawText(QPointF(contentLeft, y + 28), ink.name(QColor::HexRgb));
for (std::size_t sizeIndex = 0; sizeIndex < std::size(SIZES); ++sizeIndex) {
const int side = SIZES[sizeIndex];
const QSize size(side, side);
for (int glyphIndex = 0; glyphIndex < glyphCount; ++glyphIndex) {
const QByteArray svg = readIconSvg(family.glyphs[glyphIndex]);
ASSERT_FALSE(svg.isEmpty()) << family.glyphs[glyphIndex];
const QPixmap pixmap = renderAtDpr(
size, DPR, [&](const QSize &pixelSize) { return renderLine(svg, ink, pixelSize); });
const qreal x = contentLeft + LABEL_WIDTH +
static_cast<qreal>(sizeIndex * glyphCount + glyphIndex) * SLOT +
(SLOT - side) / 2.0;
painter.drawPixmap(QPointF(x, y + (ROW_HEIGHT - side) / 2.0 - 2), pixmap);
}
}
y += ROW_HEIGHT;
}
}
panelTop += panelHeight + 24;
}
painter.end();
const QString path = QDir(outDir).absoluteFilePath(
QStringLiteral("semantic-tint-preview-%1-%2.png")
.arg(theme.toLower(), dark ? QStringLiteral("dark") : QStringLiteral("light")));
ASSERT_TRUE(image.save(path)) << path.toStdString();
}
}
}
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