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// Copyright (C) 2022 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0+ OR GPL-3.0 WITH Qt-GPL-exception-1.0
#include "glyphcache.h"
#include <QTextLayout>
namespace Terminal::Internal {
size_t qHash(const GlyphCacheKey &key, size_t seed = 0)
{
return qHash(key.font, seed) ^ qHash(key.text, seed);
}
GlyphCache &GlyphCache::instance()
{
static GlyphCache cache(5000);
return cache;
}
const QGlyphRun *GlyphCache::get(const QFont &font, const QString &text)
{
GlyphCacheKey key{font, text};
if (auto *run = object(key))
return run;
QTextLayout layout;
layout.setText(text);
layout.setFont(font);
layout.beginLayout();
layout.createLine().setNumColumns(std::numeric_limits<int>::max());
layout.endLayout();
if (layout.lineCount() > 0) {
const auto &line = layout.lineAt(0);
const auto runs = line.glyphRuns();
if (!runs.isEmpty()) {
QGlyphRun *run = new QGlyphRun(layout.lineAt(0).glyphRuns().first());
insert(key, run);
return run;
}
}
return nullptr;
}
} // namespace Terminal::Internal
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