Mercurial > hg > sonic-visualiser
view main/SVSplash.cpp @ 1480:f1e1745acc3b 3.0-integration
Make the colour 3d plot renderer able to support more than one level of peak cache; introduce a second "peak" cache for the spectrogram layer that actually has a 1-1 column relationship with the underlying FFT model, and use it in addition to the existing peak cache if memory is plentiful. Makes spectrograms appear much faster in many common situations.
author | Chris Cannam |
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date | Thu, 05 Jan 2017 14:02:54 +0000 |
parents | ee908153066e |
children | 893f556cd5c9 |
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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 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 "SVSplash.h" #include "../version.h" #include <QPainter> #include <QApplication> #include <QDesktopWidget> #include <QSvgRenderer> #include <cmath> #include <iostream> using namespace std; SVSplash::SVSplash() { setWindowFlags(windowFlags() | Qt::WindowStaysOnTopHint); QPixmap *p1 = new QPixmap(":icons/scalable/sv-splash.png"); int w = p1->width(), h = p1->height(); QRect desk = QApplication::desktop()->availableGeometry(); double dpratio = devicePixelRatio(); double widthMultiple = double(desk.width()) / double(w); int sw = w, sh = h; if (widthMultiple > 2.5 || dpratio > 1.0) { // Hi-dpi either via pixel doubling or simply via lots of // pixels double factor = widthMultiple / 2.5; if (factor < 1.0) factor = 1.0; sw = int(floor(w * factor)); sh = int(floor(h * factor)); delete p1; m_pixmap = new QPixmap(int(floor(sw * dpratio)), int(floor(sh * dpratio))); // cerr << "pixmap size = " << m_pixmap->width() << " * " // << m_pixmap->height() << endl; m_pixmap->fill(Qt::red); QSvgRenderer renderer(QString(":icons/scalable/sv-splash.svg")); QPainter painter(m_pixmap); renderer.render(&painter); painter.end(); } else { // The "low dpi" case m_pixmap = p1; } setFixedWidth(sw); setFixedHeight(sh); setGeometry(desk.x() + desk.width()/2 - sw/2, desk.y() + desk.height()/2 - sh/2, sw, sh); } SVSplash::~SVSplash() { delete m_pixmap; } void SVSplash::finishSplash(QWidget *w) { finish(w); } void SVSplash::drawContents(QPainter *painter) { painter->drawPixmap(rect(), *m_pixmap, m_pixmap->rect()); QString text = QString("v%1").arg(SV_VERSION); painter->drawText (width() - painter->fontMetrics().width(text) - (width()/50), (width()/70) + painter->fontMetrics().ascent(), text); }