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/**************************************************************************** ** ** Copyright (C) 2005-2007 Trolltech ASA. All rights reserved. ** ** This file is part of the demonstration applications of the Qt Toolkit. ** ** This file may be used under the terms of the GNU General Public ** License version 2.0 as published by the Free Software Foundation ** and appearing in the file LICENSE.GPL included in the packaging of ** this file. Please review the following information to ensure GNU ** General Public Licensing requirements will be met: ** http://www.trolltech.com/products/qt/opensource.html ** ** If you are unsure which license is appropriate for your use, please ** review the following information: ** http://www.trolltech.com/products/qt/licensing.html or contact the ** sales department at [email protected]. ** ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. ** ****************************************************************************/ #include "composition.h" #include <QBoxLayout> #include <QRadioButton> #include <QTimer> #include <QDateTime> #include <QSlider> #include <QMouseEvent> #include <math.h> CompositionWidget::CompositionWidget(QWidget *parent) : QWidget(parent) { CompositionRenderer *view = new CompositionRenderer(this); QGroupBox *mainGroup = new QGroupBox(parent); mainGroup->setAttribute(Qt::WA_ContentsPropagated); mainGroup->setTitle("Composition Modes"); QGroupBox *modesGroup = new QGroupBox(mainGroup); modesGroup->setAttribute(Qt::WA_ContentsPropagated); modesGroup->setTitle("Mode"); rbClear = new QRadioButton("Clear", modesGroup); connect(rbClear, SIGNAL(clicked()), view, SLOT(setClearMode())); rbSource = new QRadioButton("Source", modesGroup); connect(rbSource, SIGNAL(clicked()), view, SLOT(setSourceMode())); rbDest = new QRadioButton("Destination", modesGroup); connect(rbDest, SIGNAL(clicked()), view, SLOT(setDestMode())); rbSourceOver = new QRadioButton("Source Over", modesGroup); connect(rbSourceOver, SIGNAL(clicked()), view, SLOT(setSourceOverMode())); rbDestOver = new QRadioButton("Destination Over", modesGroup); connect(rbDestOver, SIGNAL(clicked()), view, SLOT(setDestOverMode())); rbSourceIn = new QRadioButton("Source In", modesGroup); connect(rbSourceIn, SIGNAL(clicked()), view, SLOT(setSourceInMode())); rbDestIn = new QRadioButton("Dest In", modesGroup); connect(rbDestIn, SIGNAL(clicked()), view, SLOT(setDestInMode())); rbSourceOut = new QRadioButton("Source Out", modesGroup); connect(rbSourceOut, SIGNAL(clicked()), view, SLOT(setSourceOutMode())); rbDestOut = new QRadioButton("Dest Out", modesGroup); connect(rbDestOut, SIGNAL(clicked()), view, SLOT(setDestOutMode())); rbSourceAtop = new QRadioButton("Source Atop", modesGroup); connect(rbSourceAtop, SIGNAL(clicked()), view, SLOT(setSourceAtopMode())); rbDestAtop = new QRadioButton("Dest Atop", modesGroup); connect(rbDestAtop, SIGNAL(clicked()), view, SLOT(setDestAtopMode())); rbXor = new QRadioButton("Xor", modesGroup); connect(rbXor, SIGNAL(clicked()), view, SLOT(setXorMode())); QGroupBox *circleColorGroup = new QGroupBox(mainGroup); circleColorGroup->setAttribute(Qt::WA_ContentsPropagated); circleColorGroup->setTitle("Circle color"); QSlider *circleColorSlider = new QSlider(Qt::Horizontal, circleColorGroup); circleColorSlider->setRange(0, 359); circleColorSlider->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed); connect(circleColorSlider, SIGNAL(valueChanged(int)), view, SLOT(setCircleColor(int))); QGroupBox *circleAlphaGroup = new QGroupBox(mainGroup); circleAlphaGroup->setAttribute(Qt::WA_ContentsPropagated); circleAlphaGroup->setTitle("Circle alpha"); QSlider *circleAlphaSlider = new QSlider(Qt::Horizontal, circleAlphaGroup); circleAlphaSlider->setRange(0, 255); circleAlphaSlider->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed); connect(circleAlphaSlider, SIGNAL(valueChanged(int)), view, SLOT(setCircleAlpha(int))); QPushButton *showSourceButton = new QPushButton(mainGroup); showSourceButton->setText("Show Source"); #ifdef QT_OPENGL_SUPPORT QPushButton *enableOpenGLButton = new QPushButton(mainGroup); enableOpenGLButton->setText("Use OpenGL"); enableOpenGLButton->setCheckable(true); enableOpenGLButton->setChecked(view->usesOpenGL()); if (!QGLFormat::hasOpenGL() || !QGLPixelBuffer::hasOpenGLPbuffers()) enableOpenGLButton->hide(); #endif QPushButton *whatsThisButton = new QPushButton(mainGroup); whatsThisButton->setText("What's This?"); whatsThisButton->setCheckable(true); QPushButton *animateButton = new QPushButton(mainGroup); animateButton->setText("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); #ifdef QT_OPENGL_SUPPORT mainGroupLayout->addWidget(enableOpenGLButton); #endif QVBoxLayout *modesLayout = new QVBoxLayout(modesGroup); modesLayout->addWidget(rbClear); modesLayout->addWidget(rbSource); modesLayout->addWidget(rbDest); modesLayout->addWidget(rbSourceOver); modesLayout->addWidget(rbDestOver); modesLayout->addWidget(rbSourceIn); modesLayout->addWidget(rbDestIn); modesLayout->addWidget(rbSourceOut); modesLayout->addWidget(rbDestOut); modesLayout->addWidget(rbSourceAtop); modesLayout->addWidget(rbDestAtop); modesLayout->addWidget(rbXor); QVBoxLayout *circleColorLayout = new QVBoxLayout(circleColorGroup); circleColorLayout->addWidget(circleColorSlider); QVBoxLayout *circleAlphaLayout = new QVBoxLayout(circleAlphaGroup); circleAlphaLayout->addWidget(circleAlphaSlider); view->loadDescription(":res/composition.html"); view->loadSourceFile(":res/composition.cpp"); connect(whatsThisButton, SIGNAL(clicked(bool)), view, SLOT(setDescriptionEnabled(bool))); connect(view, SIGNAL(descriptionEnabledChanged(bool)), whatsThisButton, SLOT(setChecked(bool))); connect(showSourceButton, SIGNAL(clicked()), view, SLOT(showSource())); #ifdef QT_OPENGL_SUPPORT connect(enableOpenGLButton, SIGNAL(clicked(bool)), view, SLOT(enableOpenGL(bool))); #endif connect(animateButton, SIGNAL(toggled(bool)), view, SLOT(setAnimationEnabled(bool))); circleColorSlider->setValue(270); circleAlphaSlider->setValue(200); rbSourceOut->animateClick(); setWindowTitle(tr("Composition Modes")); } 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_image = QImage(":res/flower_2.png"); 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); #ifdef QT_OPENGL_SUPPORT m_pbuffer = 0; m_pbuffer_size = 1024; #endif } 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::updateCirclePos() { if (m_current_object != NoObject) return; QDateTime dt = QDateTime::currentDateTime(); qreal t = (dt.toTime_t() * 1000 + dt.time().msec()) / 1000.0; qreal x = width() / 2.0 + (cos(t) + sin(-t*2)) * width() / 2.0; qreal y = height() / 2.0 + (sin(t) + cos(t * 3)) * height() / 2.0; m_circle_pos = QLineF(m_circle_pos, QPointF(x, y)).pointAt(0.01); } 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.light()); circle_gradient.setColorAt(0.5, color); circle_gradient.setColorAt(1, color.dark()); p.setBrush(circle_gradient); p.drawEllipse(circle_rect); } void CompositionRenderer::paint(QPainter *painter) { if (m_animation_enabled) updateCirclePos(); #ifdef QT_OPENGL_SUPPORT if (usesOpenGL()) { int new_pbuf_size = m_pbuffer_size; if (size().width() > m_pbuffer_size || size().height() > m_pbuffer_size) new_pbuf_size *= 2; if (size().width() < m_pbuffer_size/2 && size().height() < m_pbuffer_size/2) new_pbuf_size /= 2; if (!m_pbuffer || new_pbuf_size != m_pbuffer_size) { if (m_pbuffer) { m_pbuffer->deleteTexture(m_base_tex); m_pbuffer->deleteTexture(m_compositing_tex); delete m_pbuffer; } m_pbuffer = new QGLPixelBuffer(QSize(new_pbuf_size, new_pbuf_size), QGLFormat::defaultFormat(), glWidget()); m_pbuffer->makeCurrent(); m_base_tex = m_pbuffer->generateDynamicTexture(); m_compositing_tex = m_pbuffer->generateDynamicTexture(); m_pbuffer_size = new_pbuf_size; } if (size() != m_previous_size) { m_previous_size = size(); QPainter p(m_pbuffer); p.setCompositionMode(QPainter::CompositionMode_Source); p.fillRect(QRect(0, 0, m_pbuffer->width(), m_pbuffer->height()), Qt::transparent); drawBase(p); m_pbuffer->updateDynamicTexture(m_base_tex); } qreal x_fraction = width()/float(m_pbuffer->width()); qreal y_fraction = height()/float(m_pbuffer->height()); { QPainter p(m_pbuffer); p.setCompositionMode(QPainter::CompositionMode_Source); p.fillRect(QRect(0, 0, m_pbuffer->width(), m_pbuffer->height()), Qt::transparent); p.save(); glBindTexture(GL_TEXTURE_2D, m_base_tex); glEnable(GL_TEXTURE_2D); glColor4f(1.,1.,1.,1.); glBegin(GL_QUADS); { glTexCoord2f(0, 1.0); glVertex2f(0, 0); glTexCoord2f(x_fraction, 1.0); glVertex2f(width(), 0); glTexCoord2f(x_fraction, 1.0-y_fraction); glVertex2f(width(), height()); glTexCoord2f(0, 1.0-y_fraction); glVertex2f(0, height()); } glEnd(); glDisable(GL_TEXTURE_2D); p.restore(); drawSource(p); m_pbuffer->updateDynamicTexture(m_compositing_tex); } glWidget()->makeCurrent(); glBindTexture(GL_TEXTURE_2D, m_compositing_tex); glEnable(GL_TEXTURE_2D); glColor4f(1.,1.,1.,1.); glBegin(GL_QUADS); { glTexCoord2f(0, 1.0); glVertex2f(0, 0); glTexCoord2f(x_fraction, 1.0); glVertex2f(width(), 0); glTexCoord2f(x_fraction, 1.0-y_fraction); glVertex2f(width(), height()); glTexCoord2f(0, 1.0-y_fraction); glVertex2f(0, height()); } glEnd(); glDisable(GL_TEXTURE_2D); } else #endif { // using a QImage 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.numBytes()); { QPainter p(&m_buffer); drawSource(p); } painter->drawImage(0, 0, m_buffer); } if (m_animation_enabled) update(); } 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; } } void CompositionRenderer::mouseMoveEvent(QMouseEvent *e) { if (m_current_object == Circle) setCirclePos(e->pos() + m_offset); } void CompositionRenderer::mouseReleaseEvent(QMouseEvent *) { m_current_object = NoObject; }
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