Mercurial > hg > svgui
view layer/ColourScale.cpp @ 1209:f7bb22999d2e 3.0-integration
Provisionally add labels for normalisation menu (sigh)
author | Chris Cannam |
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date | Tue, 03 Jan 2017 16:23:11 +0000 |
parents | c53ed1a6fcbd |
children | 822edd9bb665 |
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/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */ /* Sonic Visualiser An audio file viewer and annotation editor. Centre for Digital Music, Queen Mary, University of London. This file copyright 2006-2016 Chris Cannam and QMUL. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. See the file COPYING included with this distribution for more information. */ #include "ColourScale.h" #include "base/AudioLevel.h" #include "base/LogRange.h" #include <cmath> #include <iostream> using namespace std; int ColourScale::m_maxPixel = 255; ColourScale::ColourScale(Parameters parameters) : m_params(parameters), m_mapper(m_params.colourMap, 1.f, double(m_maxPixel)) { if (m_params.minValue >= m_params.maxValue) { cerr << "ERROR: ColourScale::ColourScale: minValue = " << m_params.minValue << ", maxValue = " << m_params.maxValue << endl; throw std::logic_error("maxValue must be greater than minValue"); } m_mappedMin = m_params.minValue; m_mappedMax = m_params.maxValue; if (m_mappedMin < m_params.threshold) { m_mappedMin = m_params.threshold; } if (m_params.scaleType == ColourScaleType::Log) { LogRange::mapRange(m_mappedMin, m_mappedMax); } else if (m_params.scaleType == ColourScaleType::PlusMinusOne) { m_mappedMin = -1.0; m_mappedMax = 1.0; } else if (m_params.scaleType == ColourScaleType::Absolute) { m_mappedMin = fabs(m_mappedMin); m_mappedMax = fabs(m_mappedMax); if (m_mappedMin >= m_mappedMax) { std::swap(m_mappedMin, m_mappedMax); } } if (m_mappedMin >= m_mappedMax) { cerr << "ERROR: ColourScale::ColourScale: minValue = " << m_params.minValue << ", maxValue = " << m_params.maxValue << ", threshold = " << m_params.threshold << ", scale = " << int(m_params.scaleType) << " resulting in mapped minValue = " << m_mappedMin << ", mapped maxValue = " << m_mappedMax << endl; throw std::logic_error("maxValue must be greater than minValue [after mapping]"); } } ColourScale::~ColourScale() { } ColourScaleType ColourScale::getScale() const { return m_params.scaleType; } int ColourScale::getPixel(double value) const { double maxPixF = m_maxPixel; if (m_params.scaleType == ColourScaleType::Phase) { double half = (maxPixF - 1.f) / 2.f; int pixel = 1 + int((value * half) / M_PI + half); // cerr << "phase = " << value << " pixel = " << pixel << endl; return pixel; } value *= m_params.gain; if (value < m_params.threshold) return 0; double mapped = value; if (m_params.scaleType == ColourScaleType::Log) { mapped = LogRange::map(value); } else if (m_params.scaleType == ColourScaleType::PlusMinusOne) { if (mapped < -1.f) mapped = -1.f; if (mapped > 1.f) mapped = 1.f; } else if (m_params.scaleType == ColourScaleType::Absolute) { if (mapped < 0.f) mapped = -mapped; } mapped *= m_params.multiple; if (mapped < m_mappedMin) { mapped = m_mappedMin; } if (mapped > m_mappedMax) { mapped = m_mappedMax; } double proportion = (mapped - m_mappedMin) / (m_mappedMax - m_mappedMin); int pixel = 0; if (m_params.scaleType == ColourScaleType::Meter) { pixel = AudioLevel::multiplier_to_preview(proportion, m_maxPixel-1) + 1; } else { pixel = int(proportion * maxPixF) + 1; } if (pixel < 0) { pixel = 0; } if (pixel > m_maxPixel) { pixel = m_maxPixel; } return pixel; } QColor ColourScale::getColourForPixel(int pixel, int rotation) const { if (pixel < 0) { pixel = 0; } if (pixel > m_maxPixel) { pixel = m_maxPixel; } if (pixel == 0) { if (m_mapper.hasLightBackground()) { return Qt::white; } else { return Qt::black; } } else { int target = int(pixel) + rotation; while (target < 1) target += m_maxPixel; while (target > m_maxPixel) target -= m_maxPixel; return m_mapper.map(double(target)); } }