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/**
* @file
* @brief Header file for Color Shift effect class
* @author Jonathan Thomas <jonathan@openshot.org>
*
* @ref License
*/
/* LICENSE
*
* Copyright (c) 2008-2019 OpenShot Studios, LLC
* <http://www.openshotstudios.com/>. This file is part of
* OpenShot Library (libopenshot), an open-source project dedicated to
* delivering high quality video editing and animation solutions to the
* world. For more information visit <http://www.openshot.org/>.
*
* OpenShot Library (libopenshot) is free software: you can redistribute it
* and/or modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* OpenShot Library (libopenshot) is distributed in the hope that it will be
* useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with OpenShot Library. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef OPENSHOT_COLOR_SHIFT_EFFECT_H
#define OPENSHOT_COLOR_SHIFT_EFFECT_H
#include "../EffectBase.h"
#include <cmath>
#include <stdio.h>
#include <memory>
#include "../Json.h"
#include "../KeyFrame.h"
namespace openshot
{
/**
* @brief This class shifts the pixels of an image up, down, left, or right, and can be animated
* with openshot::Keyframe curves over time.
*
* Shifting pixels can be used in many interesting ways, especially when animating the movement of the pixels.
* The pixels wrap around the image (the pixels drop off one side and appear on the other side of the image).
*/
class ColorShift : public EffectBase
{
private:
/// Init effect settings
void init_effect_details();
public:
Keyframe red_x; ///< Shift the Red X coordinates (left or right)
Keyframe red_y; ///< Shift the Red Y coordinates (up or down)
Keyframe green_x; ///< Shift the Green X coordinates (left or right)
Keyframe green_y; ///< Shift the Green Y coordinates (up or down)
Keyframe blue_x; ///< Shift the Blue X coordinates (left or right)
Keyframe blue_y; ///< Shift the Blue Y coordinates (up or down)
Keyframe alpha_x; ///< Shift the Alpha X coordinates (left or right)
Keyframe alpha_y; ///< Shift the Alpha Y coordinates (up or down)
/// Blank constructor, useful when using Json to load the effect properties
ColorShift();
/// Default constructor, which takes 8 curves. The curves will shift the RGBA pixels up, down, left, or right
///
/// @param red_x The curve to adjust the Red x shift (between -1 and 1, percentage)
/// @param red_y The curve to adjust the Red y shift (between -1 and 1, percentage)
/// @param green_x The curve to adjust the Green x shift (between -1 and 1, percentage)
/// @param green_y The curve to adjust the Green y shift (between -1 and 1, percentage)
/// @param blue_x The curve to adjust the Blue x shift (between -1 and 1, percentage)
/// @param blue_y The curve to adjust the Blue y shift (between -1 and 1, percentage)
/// @param alpha_x The curve to adjust the Alpha x shift (between -1 and 1, percentage)
/// @param alpha_y The curve to adjust the Alpha y shift (between -1 and 1, percentage)
ColorShift(Keyframe red_x, Keyframe red_y, Keyframe green_x, Keyframe green_y, Keyframe blue_x, Keyframe blue_y, Keyframe alpha_x, Keyframe alpha_y);
/// @brief This method is required for all derived classes of EffectBase, and returns a
/// modified openshot::Frame object
///
/// The frame object is passed into this method, and a frame_number is passed in which
/// tells the effect which settings to use from its keyframes (starting at 1).
///
/// @returns The modified openshot::Frame object
/// @param frame The frame object that needs the effect applied to it
/// @param frame_number The frame number (starting at 1) of the effect on the timeline.
std::shared_ptr<Frame> GetFrame(std::shared_ptr<Frame> frame, int64_t frame_number);
/// Get and Set JSON methods
std::string Json() const override; ///< Generate JSON string of this object
void SetJson(const std::string value); ///< Load JSON string into this object
Json::Value JsonValue() const override; ///< Generate Json::Value for this object
void SetJsonValue(const Json::Value root); ///< Load Json::Value into this object
/// Get all properties for a specific frame (perfect for a UI to display the current state
/// of all properties at any time)
std::string PropertiesJSON(int64_t requested_frame) const override;
};
}
#endif
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