Everywhere: Move the Ladybird folder to UI

Author: https://github.com/trflynn89
Commit: db47cc41f8
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/2256
Reviewed-by: https://github.com/sideshowbarker

UI/Qt/TVGIconEngine.h

@@ -0,0 +1,69 @@
+/*
+ * Copyright (c) 2023, MacDue <macdue@dueutil.tech>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <AK/Function.h>
+#include <AK/RefCounted.h>
+#include <AK/Vector.h>
+#include <LibGfx/ImageFormats/TinyVGLoader.h>
+
+#include <QIconEngine>
+
+namespace Ladybird {
+
+class TVGIconEngine : public QIconEngine {
+public:
+    TVGIconEngine(Gfx::TinyVGDecodedImageData const& image_data)
+        : m_image_data(image_data)
+    {
+    }
+
+    static TVGIconEngine* from_file(QString const& path);
+
+    void paint(QPainter* painter, QRect const& rect, QIcon::Mode mode,
+        QIcon::State state) override;
+    QIconEngine* clone() const override;
+    QPixmap pixmap(QSize const& size, QIcon::Mode mode,
+        QIcon::State state) override;
+
+    void add_filter(QIcon::Mode mode, Function<Color(Color)> filter);
+
+private:
+    static unsigned next_cache_id()
+    {
+        static unsigned cache_id = 0;
+        return cache_id++;
+    }
+
+    void invalidate_cache()
+    {
+        m_cache_id = next_cache_id();
+    }
+
+    class Filter : public RefCounted<Filter> {
+    public:
+        Filter(QIcon::Mode mode, Function<Color(Color)> function)
+            : m_mode(mode)
+            , m_function(move(function))
+        {
+        }
+        QIcon::Mode mode() const { return m_mode; }
+        Function<Color(Color)> const& function() const { return m_function; }
+
+    private:
+        QIcon::Mode m_mode;
+        Function<Color(Color)> m_function;
+    };
+
+    QString pixmap_cache_key(QSize const& size, QIcon::Mode mode, QIcon::State state);
+
+    Vector<NonnullRefPtr<Filter>> m_filters;
+    NonnullRefPtr<Gfx::TinyVGDecodedImageData> m_image_data;
+    unsigned m_cache_id { next_cache_id() };
+};
+
+}