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Telegram/lib_lottie/lottie/lottie_frame_generator.h

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+// This file is part of Desktop App Toolkit,
+// a set of libraries for developing nice desktop applications.
+//
+// For license and copyright information please follow this link:
+// https://github.com/desktop-app/legal/blob/master/LEGAL
+//
+#pragma once
+
+#include "ui/effects/frame_generator.h"
+
+#include <QtGui/QImage>
+#include <memory>
+
+namespace rlottie {
+class Animation;
+} // namespace rlottie
+
+namespace Lottie {
+
+class FrameGenerator final : public Ui::FrameGenerator {
+public:
+	explicit FrameGenerator(const QByteArray &bytes);
+	~FrameGenerator();
+
+	int count() override;
+	double rate() override;
+	Frame renderNext(
+		QImage storage,
+		QSize size,
+		Qt::AspectRatioMode mode = Qt::IgnoreAspectRatio) override;
+	Frame renderCurrent(
+		QImage storage,
+		QSize size,
+		Qt::AspectRatioMode mode = Qt::IgnoreAspectRatio) override;
+	void jumpToStart() override;
+
+private:
+	std::unique_ptr<rlottie::Animation> _rlottie;
+	QSize _size;
+	int _multiplier = 1;
+	int _frameDuration = 0;
+	int _framesCount = 0;
+	int _frameIndex = 0;
+
+};
+
+} // namespace Lottie