File indexing completed on 2024-04-28 04:52:22

 /*
     SPDX-FileCopyrightText: 2010 Simon Andreas Eugster <simon.eu@gmail.com>
     This file is part of kdenlive. See www.kdenlive.org.
 
 SPDX-License-Identifier: GPL-3.0-only OR LicenseRef-KDE-Accepted-GPL
 */
 
 #pragma once
 
 #include <QObject>
 #include "colorconstants.h"
 
 class QColor;
 class QImage;
 class QPainter;
 class QRect;
 class QSize;
 
 class HistogramGenerator : public QObject
 {
     Q_OBJECT
 public:
     explicit HistogramGenerator();
 
     /**
      * Calculates a histogram display from the input image.
      * @param paradeSize
      * @param image
      * @param components OR-ed HistogramGenerator::Components flags and decide with components (Y, R, G, B) to paint.
      * @param rec
      * @param unscaled unscaled = true leaves the width at 256 if the widget is wider (to avoid scaling).
      * @param logScale Use a logarithmic instead of linear scale.
      * @param accelFactor
      * @return
      */
     QImage calculateHistogram(const QSize &paradeSize, const QImage &image, const int &components, const ITURec rec, bool unscaled,
                               bool logScale,
                               uint accelFactor = 1) const;
 
     /**
      * Draws the histogram of a single component.
      *
      * @param y Bins containing the number of samples per value
      * @param size Desired box size of the histogram
      * @param scaling Use this scaling factor to scale the y values to the box height
      * @param color Color to use for drawing
      * @param unscaled Do not scale the width but take the number of bins instead (usually 256)
      * @param logScale Use logarithmic scale instead of linear
      * @param max Number of bins, usually 256
      */
     static QImage drawComponent(const int *y, const QSize &size, const float &scaling, const QColor &color, bool unscaled, bool logScale, int max) ;
 
     static void drawComponentFull(QPainter *davinci, const int *y, const float &scaling, const QRect &rect, const QColor &color, int textSpace,
             bool unscaled, bool logScale, int max) ;
 
     enum Components { ComponentY = 1 << 0, ComponentR = 1 << 1, ComponentG = 1 << 2, ComponentB = 1 << 3, ComponentSum = 1 << 4 };
 };