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98 lines
3.4 KiB
C++
98 lines
3.4 KiB
C++
/**
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* @file
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* @brief Header file for Shift effect class
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* @author Jonathan Thomas <jonathan@openshot.org>
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*
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* @ref License
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*/
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/* LICENSE
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*
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* Copyright (c) 2008-2019 OpenShot Studios, LLC
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* <http://www.openshotstudios.com/>. This file is part of
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* OpenShot Library (libopenshot), an open-source project dedicated to
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* delivering high quality video editing and animation solutions to the
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* world. For more information visit <http://www.openshot.org/>.
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*
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* OpenShot Library (libopenshot) is free software: you can redistribute it
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* and/or modify it under the terms of the GNU Lesser General Public License
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* as published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* OpenShot Library (libopenshot) is distributed in the hope that it will be
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* useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with OpenShot Library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef OPENSHOT_SHIFT_EFFECT_H
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#define OPENSHOT_SHIFT_EFFECT_H
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#include "../EffectBase.h"
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#include <cmath>
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#include <stdio.h>
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#include <memory>
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#include "../Json.h"
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#include "../KeyFrame.h"
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namespace openshot
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{
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/**
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* @brief This class shifts the pixels of an image up, down, left, or right, and can be animated
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* with openshot::Keyframe curves over time.
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*
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* Shifting pixels can be used in many interesting ways, especially when animating the movement of the pixels.
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* The pixels wrap around the image (the pixels drop off one side and appear on the other side of the image).
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*/
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class Shift : public EffectBase
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{
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private:
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/// Init effect settings
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void init_effect_details();
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public:
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Keyframe x; ///< Shift the X coordinates (left or right)
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Keyframe y; ///< Shift the Y coordinates (up or down)
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/// Blank constructor, useful when using Json to load the effect properties
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Shift();
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/// Default constructor, which takes 2 curve. The curves will shift the pixels up, down, left, or right
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///
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/// @param x The curve to adjust the x shift (between -1 and 1, percentage)
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/// @param y The curve to adjust the y shift (between -1 and 1, percentage)
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Shift(Keyframe x, Keyframe y);
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/// @brief This method is required for all derived classes of EffectBase, and returns a
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/// modified openshot::Frame object
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///
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/// The frame object is passed into this method, and a frame_number is passed in which
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/// tells the effect which settings to use from its keyframes (starting at 1).
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///
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/// @returns The modified openshot::Frame object
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/// @param frame The frame object that needs the effect applied to it
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/// @param frame_number The frame number (starting at 1) of the effect on the timeline.
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std::shared_ptr<Frame> GetFrame(std::shared_ptr<Frame> frame, int64_t frame_number);
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/// Get and Set JSON methods
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std::string Json(); ///< Generate JSON string of this object
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void SetJson(std::string value); ///< Load JSON string into this object
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Json::Value JsonValue(); ///< Generate Json::JsonValue for this object
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void SetJsonValue(Json::Value root); ///< Load Json::JsonValue into this object
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/// Get all properties for a specific frame (perfect for a UI to display the current state
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/// of all properties at any time)
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std::string PropertiesJSON(int64_t requested_frame);
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};
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}
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#endif
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