Photoshop PSD import (Compositor 1.2.0, part one)

src/IO/PSD/PSDReader.h

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+#pragma once
+#include "IO/PSD/PSDTypes.h"
+#include <QByteArray>
+#include <QString>
+#include <map>
+#include <set>
+
+// Photoshop `.psd` from Adobe's 2019 specification; no GPL code.
+namespace PSDReader {
+bool matches(const QString &path);
+bool matches(const QByteArray &data);
+PSDDocument read(const QString &path, qint64 remainingPixels = 100'000'000);
+PSDDocument read(const QByteArray &data, qint64 remainingPixels = 100'000'000);
+extern const std::set<QString> adjustmentKeys;
+}
+
+// Levels, Curves and Hue/Saturation layers, as Swift reads them.
+namespace PSDAdjustments {
+std::optional<LayerAdjustment> parse(const std::map<QString, QByteArray> &extra);
+}