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94 lines
3.3 KiB
C++
94 lines
3.3 KiB
C++
/**
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* @file
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* @brief Header file for Mask class
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* @author Jonathan Thomas <jonathan@openshot.org>
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*
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* @section LICENSE
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*
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* Copyright (c) 2008-2013 OpenShot Studios, LLC
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* (http://www.openshotstudios.com). This file is part of
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* OpenShot Library (http://www.openshot.org), an open-source project
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* dedicated to delivering high quality video editing and animation solutions
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* to the world.
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*
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* OpenShot Library is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* OpenShot Library is distributed in the hope that it will be useful,
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* 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 General Public License for more details.
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*
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* You should have received a copy of the GNU 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_WIPE_EFFECT_H
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#define OPENSHOT_WIPE_EFFECT_H
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#include "../EffectBase.h"
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#include <cmath>
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#include <ctime>
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#include <iostream>
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#include <omp.h>
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#include <stdio.h>
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#include <tr1/memory>
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#include "Magick++.h"
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#include "../Color.h"
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#include "../Exceptions.h"
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#include "../KeyFrame.h"
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#include "../ReaderBase.h"
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using namespace std;
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namespace openshot
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{
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/**
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* @brief This class uses the ImageMagick++ libraries, to apply alpha (or transparency) masks
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* to any frame. It can also be animated, and used as a powerful Wipe transition.
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*
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* These masks / wipes can also be combined, such as a transparency mask on top of a clip, which
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* is then wiped away with another animated version of this effect.
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*/
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class Mask : public EffectBase
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{
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private:
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ReaderBase *reader;
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Keyframe brightness;
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Keyframe contrast;
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tr1::shared_ptr<Magick::Image> mask;
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/// Set brightness and contrast
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void set_brightness_and_contrast(tr1::shared_ptr<Magick::Image> image, float brightness, float contrast);
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public:
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/// Default constructor, which takes 2 curves and a mask image path. The mask is used to
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/// determine the alpha for each pixel (black is transparent, white is visible). The curves
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/// adjust the brightness and contrast of this file, to animate the effect.
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///
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/// @param mask_reader The reader of a grayscale mask image or video, to be used by the wipe transition
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/// @param mask_brightness The curve to adjust the brightness of the wipe's mask
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/// @param mask_contrast The curve to adjust the contrast of the wipe's mask
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Mask(ReaderBase *mask_reader, Keyframe mask_brightness, Keyframe mask_contrast) throw(InvalidFile, ReaderClosed);
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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 it's 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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tr1::shared_ptr<Frame> GetFrame(tr1::shared_ptr<Frame> frame, int frame_number);
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};
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}
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#endif
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