Files
OmaPhoto/tests/CanvasPerformanceTests.cpp
雷电芽衣andClaude c864304695
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OmaPhoto 1.0.0: the Linux port of Compositor
A layered image editor for Linux and Omarchy, ported from Compositor
(github.com/robbietilton/Compositor), whose Swift source is its
specification. It reads and writes Compositor's .comp projects.

Packages for Ubuntu, Fedora and Arch come from the release workflow;
scripts/install/ holds one install script per distribution family,
and flake.nix serves NixOS.

Co-Authored-By: Claude <noreply@anthropic.com>
2026-09-26 00:44:52 -04:00

100 lines
4.2 KiB
C++

#include "CanvasFixtures.h"
#include <QElapsedTimer>
#include <algorithm>
// Pan and zoom at 4K, ten layers: CANVAS_BENCHMARK=1, alone.
class CanvasPerformanceTests : public QObject {
Q_OBJECT
private slots:
void fourKPanAndZoom();
};
namespace {
struct Timings {
std::vector<double> frames;
double median() { return at(0.5); }
double at(double share)
{
std::sort(frames.begin(), frames.end());
return frames[std::min(frames.size() - 1, size_t(double(frames.size()) * share))];
}
};
}
void CanvasPerformanceTests::fourKPanAndZoom()
{
if (qEnvironmentVariable("CANVAS_BENCHMARK") != QStringLiteral("1"))
QSKIP("CANVAS_BENCHMARK=1 runs the benchmark");
Shown shown(QSize(3840, 2160), QSize(1000, 1000));
EditorSession &session = shown.session;
// Ten layers: photographs, halves, blend modes and opacities.
const LayerBlendMode modes[] = {LayerBlendMode::normal, LayerBlendMode::multiply, LayerBlendMode::screen, LayerBlendMode::overlay, LayerBlendMode::hue};
const int count = qEnvironmentVariableIntValue("CANVAS_LAYERS") > 0 ? qEnvironmentVariableIntValue("CANVAS_LAYERS") : 10;
for (int index = 0; index < count; ++index) {
const bool whole = index % 2 == 0;
const QImage pixels = noise(whole ? 3840 : 1920, whole ? 2160 : 1080, quint32(index + 1), whole ? 255 : 200);
session.insert(ImportedImage(pixels, pixels, QStringLiteral("Layer %1").arg(index)), QPointF(whole ? 1920 : 800 + index * 150, whole ? 1080 : 700));
session.setLayerBlendMode(qEnvironmentVariableIsSet("CANVAS_NORMAL") ? LayerBlendMode::normal : modes[index % 5]);
session.setLayerOpacity(index == 0 ? 1.0 : 0.7);
}
shown.settle();
session.fit();
shown.canvas->synchronizeDisplay();
shown.canvas->repaint();
const auto display = [&] {
shown.canvas->synchronizeDisplay();
QCoreApplication::sendPostedEvents(nullptr, QEvent::UpdateRequest);
};
const QPointF middle(500, 500);
std::vector<double> medians;
for (const bool actual : {false, true}) {
// Actual Pixels, as the menu sets it.
if (actual) {
session.zoom(1, middle);
QCOMPARE(session.viewport.zoom(), 1.0);
display();
}
// A trackpad's pan: pixel deltas through the canvas's own path.
Timings pan;
for (int step = 0; step < 120; ++step) {
QElapsedTimer frame;
frame.start();
wheel(*shown.canvas, middle, QPoint(step < 60 ? 9 : -9, step % 2 ? 6 : -6), QPoint(0, 0), Qt::NoModifier);
display();
pan.frames.push_back(double(frame.nsecsElapsed()) / 1e6);
}
qInfo().noquote() << QStringLiteral("CANVAS BENCH pan zoom=%1 median=%2 p95=%3 max=%4ms")
.arg(actual ? QStringLiteral("100%") : QStringLiteral("fit")).arg(pan.median(), 0, 'f', 2).arg(pan.at(0.95), 0, 'f', 2)
.arg(pan.at(1), 0, 'f', 2);
medians.push_back(pan.median());
}
// A pinch: zoom steps in and out around the middle.
session.fit();
display();
Timings zooming;
for (int step = 0; step < 80; ++step) {
QElapsedTimer frame;
frame.start();
session.zoom(session.viewport.zoom() * (step < 40 ? 1.05 : 1 / 1.05), middle);
display();
zooming.frames.push_back(double(frame.nsecsElapsed()) / 1e6);
}
qInfo().noquote() << QStringLiteral("CANVAS BENCH zoom median=%1 p95=%2 max=%3ms")
.arg(zooming.median(), 0, 'f', 2).arg(zooming.at(0.95), 0, 'f', 2).arg(zooming.at(1), 0, 'f', 2);
medians.push_back(zooming.median());
// Guards at half again the medians measured in 11.1.
const double limits[] = {45, 100, 115};
for (size_t index = 0; index < medians.size(); ++index)
QVERIFY2(medians[index] <= limits[index], qPrintable(QString::number(medians[index])));
}
int main(int argc, char **argv)
{
// Swift's benchmark draws at a backing scale of two.
qputenv("QT_SCALE_FACTOR", "2");
QApplication app(argc, argv);
CanvasPerformanceTests tests;
return QTest::qExec(&tests, argc, argv);
}
#include "CanvasPerformanceTests.moc"