// Copyright (C) 2016 The Qt Company Ltd. // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause #include "composition.h" #include #include #include #include #include #include #include const int animationInterval = 15; // update every 16 ms = ~60FPS CompositionWidget::CompositionWidget(QWidget *parent) : QWidget(parent) { CompositionRenderer *view = new CompositionRenderer(this); QGroupBox *mainGroup = new QGroupBox(parent); mainGroup->setTitle(tr("Composition Modes")); QGroupBox *modesGroup = new QGroupBox(mainGroup); modesGroup->setTitle(tr("Mode")); rbClear = new QRadioButton(tr("Clear"), modesGroup); connect(rbClear, &QAbstractButton::clicked, view, &CompositionRenderer::setClearMode); rbSource = new QRadioButton(tr("Source"), modesGroup); connect(rbSource, &QAbstractButton::clicked, view, &CompositionRenderer::setSourceMode); rbDest = new QRadioButton(tr("Destination"), modesGroup); connect(rbDest, &QAbstractButton::clicked, view, &CompositionRenderer::setDestMode); rbSourceOver = new QRadioButton(tr("Source Over"), modesGroup); connect(rbSourceOver, &QAbstractButton::clicked, view, &CompositionRenderer::setSourceOverMode); rbDestOver = new QRadioButton(tr("Destination Over"), modesGroup); connect(rbDestOver, &QAbstractButton::clicked, view, &CompositionRenderer::setDestOverMode); rbSourceIn = new QRadioButton(tr("Source In"), modesGroup); connect(rbSourceIn, &QAbstractButton::clicked, view, &CompositionRenderer::setSourceInMode); rbDestIn = new QRadioButton(tr("Dest In"), modesGroup); connect(rbDestIn, &QAbstractButton::clicked, view, &CompositionRenderer::setDestInMode); rbSourceOut = new QRadioButton(tr("Source Out"), modesGroup); connect(rbSourceOut, &QAbstractButton::clicked, view, &CompositionRenderer::setSourceOutMode); rbDestOut = new QRadioButton(tr("Dest Out"), modesGroup); connect(rbDestOut, &QAbstractButton::clicked, view, &CompositionRenderer::setDestOutMode); rbSourceAtop = new QRadioButton(tr("Source Atop"), modesGroup); connect(rbSourceAtop, &QAbstractButton::clicked, view, &CompositionRenderer::setSourceAtopMode); rbDestAtop = new QRadioButton(tr("Dest Atop"), modesGroup); connect(rbDestAtop, &QAbstractButton::clicked, view, &CompositionRenderer::setDestAtopMode); rbXor = new QRadioButton(tr("Xor"), modesGroup); connect(rbXor, &QAbstractButton::clicked, view, &CompositionRenderer::setXorMode); rbPlus = new QRadioButton(tr("Plus"), modesGroup); connect(rbPlus, &QAbstractButton::clicked, view, &CompositionRenderer::setPlusMode); rbMultiply = new QRadioButton(tr("Multiply"), modesGroup); connect(rbMultiply, &QAbstractButton::clicked, view, &CompositionRenderer::setMultiplyMode); rbScreen = new QRadioButton(tr("Screen"), modesGroup); connect(rbScreen, &QAbstractButton::clicked, view, &CompositionRenderer::setScreenMode); rbOverlay = new QRadioButton(tr("Overlay"), modesGroup); connect(rbOverlay, &QAbstractButton::clicked, view, &CompositionRenderer::setOverlayMode); rbDarken = new QRadioButton(tr("Darken"), modesGroup); connect(rbDarken, &QAbstractButton::clicked, view, &CompositionRenderer::setDarkenMode); rbLighten = new QRadioButton(tr("Lighten"), modesGroup); connect(rbLighten, &QAbstractButton::clicked, view, &CompositionRenderer::setLightenMode); rbColorDodge = new QRadioButton(tr("Color Dodge"), modesGroup); connect(rbColorDodge, &QAbstractButton::clicked, view, &CompositionRenderer::setColorDodgeMode); rbColorBurn = new QRadioButton(tr("Color Burn"), modesGroup); connect(rbColorBurn, &QAbstractButton::clicked, view, &CompositionRenderer::setColorBurnMode); rbHardLight = new QRadioButton(tr("Hard Light"), modesGroup); connect(rbHardLight, &QAbstractButton::clicked, view, &CompositionRenderer::setHardLightMode); rbSoftLight = new QRadioButton(tr("Soft Light"), modesGroup); connect(rbSoftLight, &QAbstractButton::clicked, view, &CompositionRenderer::setSoftLightMode); rbDifference = new QRadioButton(tr("Difference"), modesGroup); connect(rbDifference, &QAbstractButton::clicked, view, &CompositionRenderer::setDifferenceMode); rbExclusion = new QRadioButton(tr("Exclusion"), modesGroup); connect(rbExclusion, &QAbstractButton::clicked, view, &CompositionRenderer::setExclusionMode); QGroupBox *circleColorGroup = new QGroupBox(mainGroup); circleColorGroup->setTitle(tr("Circle color")); QSlider *circleColorSlider = new QSlider(Qt::Horizontal, circleColorGroup); circleColorSlider->setRange(0, 359); circleColorSlider->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed); connect(circleColorSlider, &QAbstractSlider::valueChanged, view, &CompositionRenderer::setCircleColor); QGroupBox *circleAlphaGroup = new QGroupBox(mainGroup); circleAlphaGroup->setTitle(tr("Circle alpha")); QSlider *circleAlphaSlider = new QSlider(Qt::Horizontal, circleAlphaGroup); circleAlphaSlider->setRange(0, 255); circleAlphaSlider->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed); connect(circleAlphaSlider, &QAbstractSlider::valueChanged, view, &CompositionRenderer::setCircleAlpha); QPushButton *showSourceButton = new QPushButton(mainGroup); showSourceButton->setText(tr("Show Source")); QPushButton *whatsThisButton = new QPushButton(mainGroup); whatsThisButton->setText(tr("What's This?")); whatsThisButton->setCheckable(true); QPushButton *animateButton = new QPushButton(mainGroup); animateButton->setText(tr("Animated")); animateButton->setCheckable(true); animateButton->setChecked(true); QHBoxLayout *viewLayout = new QHBoxLayout(this); viewLayout->addWidget(view); viewLayout->addWidget(mainGroup); QVBoxLayout *mainGroupLayout = new QVBoxLayout(mainGroup); mainGroupLayout->addWidget(circleColorGroup); mainGroupLayout->addWidget(circleAlphaGroup); mainGroupLayout->addWidget(modesGroup); mainGroupLayout->addStretch(); mainGroupLayout->addWidget(animateButton); mainGroupLayout->addWidget(whatsThisButton); mainGroupLayout->addWidget(showSourceButton); QGridLayout *modesLayout = new QGridLayout(modesGroup); modesLayout->addWidget(rbClear, 0, 0); modesLayout->addWidget(rbSource, 1, 0); modesLayout->addWidget(rbDest, 2, 0); modesLayout->addWidget(rbSourceOver, 3, 0); modesLayout->addWidget(rbDestOver, 4, 0); modesLayout->addWidget(rbSourceIn, 5, 0); modesLayout->addWidget(rbDestIn, 6, 0); modesLayout->addWidget(rbSourceOut, 7, 0); modesLayout->addWidget(rbDestOut, 8, 0); modesLayout->addWidget(rbSourceAtop, 9, 0); modesLayout->addWidget(rbDestAtop, 10, 0); modesLayout->addWidget(rbXor, 11, 0); modesLayout->addWidget(rbPlus, 0, 1); modesLayout->addWidget(rbMultiply, 1, 1); modesLayout->addWidget(rbScreen, 2, 1); modesLayout->addWidget(rbOverlay, 3, 1); modesLayout->addWidget(rbDarken, 4, 1); modesLayout->addWidget(rbLighten, 5, 1); modesLayout->addWidget(rbColorDodge, 6, 1); modesLayout->addWidget(rbColorBurn, 7, 1); modesLayout->addWidget(rbHardLight, 8, 1); modesLayout->addWidget(rbSoftLight, 9, 1); modesLayout->addWidget(rbDifference, 10, 1); modesLayout->addWidget(rbExclusion, 11, 1); QVBoxLayout *circleColorLayout = new QVBoxLayout(circleColorGroup); circleColorLayout->addWidget(circleColorSlider); QVBoxLayout *circleAlphaLayout = new QVBoxLayout(circleAlphaGroup); circleAlphaLayout->addWidget(circleAlphaSlider); view->loadDescription(":res/composition/composition.html"); view->loadSourceFile(":res/composition/composition.cpp"); connect(whatsThisButton, &QAbstractButton::clicked, view, &ArthurFrame::setDescriptionEnabled); connect(view, &ArthurFrame::descriptionEnabledChanged, whatsThisButton, &QAbstractButton::setChecked); connect(showSourceButton, &QAbstractButton::clicked, view, &ArthurFrame::showSource); connect(animateButton, &QAbstractButton::toggled, view, &CompositionRenderer::setAnimationEnabled); circleColorSlider->setValue(270); circleAlphaSlider->setValue(200); rbSourceOut->animateClick(); setWindowTitle(tr("Composition Modes")); } CompositionWidget::~CompositionWidget() { } void CompositionWidget::nextMode() { /* if (!m_animation_enabled) return; if (rbClear->isChecked()) rbSource->animateClick(); if (rbSource->isChecked()) rbDest->animateClick(); if (rbDest->isChecked()) rbSourceOver->animateClick(); if (rbSourceOver->isChecked()) rbDestOver->animateClick(); if (rbDestOver->isChecked()) rbSourceIn->animateClick(); if (rbSourceIn->isChecked()) rbDestIn->animateClick(); if (rbDestIn->isChecked()) rbSourceOut->animateClick(); if (rbSourceOut->isChecked()) rbDestOut->animateClick(); if (rbDestOut->isChecked()) rbSourceAtop->animateClick(); if (rbSourceAtop->isChecked()) rbDestAtop->animateClick(); if (rbDestAtop->isChecked()) rbXor->animateClick(); if (rbXor->isChecked()) rbClear->animateClick(); */ } CompositionRenderer::CompositionRenderer(QWidget *parent) : ArthurFrame(parent) { m_animation_enabled = true; m_animationTimer = startTimer(animationInterval); m_image = QImage(":res/composition/flower.jpg"); m_image.setAlphaChannel(QImage(":res/composition/flower_alpha.jpg")); m_circle_alpha = 127; m_circle_hue = 255; m_current_object = NoObject; m_composition_mode = QPainter::CompositionMode_SourceOut; m_circle_pos = QPoint(200, 100); setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding); } CompositionRenderer::~CompositionRenderer() { } QRectF rectangle_around(const QPointF &p, const QSizeF &size = QSize(250, 200)) { QRectF rect(p, size); rect.translate(-size.width()/2, -size.height()/2); return rect; } void CompositionRenderer::setAnimationEnabled(bool enabled) { if (m_animation_enabled == enabled) return; m_animation_enabled = enabled; if (enabled) { Q_ASSERT(!m_animationTimer); m_animationTimer = startTimer(animationInterval); } else { killTimer(m_animationTimer); m_animationTimer = 0; } } void CompositionRenderer::updateCirclePos() { if (m_current_object != NoObject) return; QDateTime dt = QDateTime::currentDateTime(); qreal t = dt.toMSecsSinceEpoch() / 1000.0; qreal x = width() / qreal(2) + (qCos(t*8/11) + qSin(-t)) * width() / qreal(4); qreal y = height() / qreal(2) + (qSin(t*6/7) + qCos(t * qreal(1.5))) * height() / qreal(4); setCirclePos(QLineF(m_circle_pos, QPointF(x, y)).pointAt(0.02)); } void CompositionRenderer::drawBase(QPainter &p) { p.setPen(Qt::NoPen); QLinearGradient rect_gradient(0, 0, 0, height()); rect_gradient.setColorAt(0, Qt::red); rect_gradient.setColorAt(.17, Qt::yellow); rect_gradient.setColorAt(.33, Qt::green); rect_gradient.setColorAt(.50, Qt::cyan); rect_gradient.setColorAt(.66, Qt::blue); rect_gradient.setColorAt(.81, Qt::magenta); rect_gradient.setColorAt(1, Qt::red); p.setBrush(rect_gradient); p.drawRect(width() / 2, 0, width() / 2, height()); QLinearGradient alpha_gradient(0, 0, width(), 0); alpha_gradient.setColorAt(0, Qt::white); alpha_gradient.setColorAt(0.2, Qt::white); alpha_gradient.setColorAt(0.5, Qt::transparent); alpha_gradient.setColorAt(0.8, Qt::white); alpha_gradient.setColorAt(1, Qt::white); p.setCompositionMode(QPainter::CompositionMode_DestinationIn); p.setBrush(alpha_gradient); p.drawRect(0, 0, width(), height()); p.setCompositionMode(QPainter::CompositionMode_DestinationOver); p.setPen(Qt::NoPen); p.setRenderHint(QPainter::SmoothPixmapTransform); p.drawImage(rect(), m_image); } void CompositionRenderer::drawSource(QPainter &p) { p.setPen(Qt::NoPen); p.setRenderHint(QPainter::Antialiasing); p.setCompositionMode(m_composition_mode); QRectF circle_rect = rectangle_around(m_circle_pos); QColor color = QColor::fromHsvF(m_circle_hue / 360.0, 1, 1, m_circle_alpha / 255.0); QLinearGradient circle_gradient(circle_rect.topLeft(), circle_rect.bottomRight()); circle_gradient.setColorAt(0, color.lighter()); circle_gradient.setColorAt(0.5, color); circle_gradient.setColorAt(1, color.darker()); p.setBrush(circle_gradient); p.drawEllipse(circle_rect); } void CompositionRenderer::paint(QPainter *painter) { if (m_buffer.size() != size()) { m_buffer = QImage(size(), QImage::Format_ARGB32_Premultiplied); m_base_buffer = QImage(size(), QImage::Format_ARGB32_Premultiplied); m_base_buffer.fill(0); QPainter p(&m_base_buffer); drawBase(p); } memcpy(m_buffer.bits(), m_base_buffer.bits(), m_buffer.sizeInBytes()); { QPainter p(&m_buffer); drawSource(p); } painter->drawImage(0, 0, m_buffer); } void CompositionRenderer::mousePressEvent(QMouseEvent *e) { setDescriptionEnabled(false); QRectF circle = rectangle_around(m_circle_pos); if (circle.contains(e->pos())) { m_current_object = Circle; m_offset = circle.center() - e->pos(); } else { m_current_object = NoObject; } if (m_animation_enabled) { killTimer(m_animationTimer); m_animationTimer = 0; } } void CompositionRenderer::mouseMoveEvent(QMouseEvent *e) { if (m_current_object == Circle) setCirclePos(e->pos() + m_offset); } void CompositionRenderer::mouseReleaseEvent(QMouseEvent *) { m_current_object = NoObject; if (m_animation_enabled) { Q_ASSERT(!m_animationTimer); m_animationTimer = startTimer(animationInterval); } } void CompositionRenderer::timerEvent(QTimerEvent *event) { if (event->timerId() == m_animationTimer) updateCirclePos(); } void CompositionRenderer::setCirclePos(const QPointF &pos) { const QRect oldRect = rectangle_around(m_circle_pos).toAlignedRect(); m_circle_pos = pos; const QRect newRect = rectangle_around(m_circle_pos).toAlignedRect(); update(oldRect | newRect); }