523 lines
20 KiB
C++
523 lines
20 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
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** Contact: http://www.qt-project.org/legal
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**
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** This file is part of the demonstration applications of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Digia. For licensing terms and
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** conditions see http://qt.digia.com/licensing. For further information
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** use the contact form at http://qt.digia.com/contact-us.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Digia gives you certain additional
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** rights. These rights are described in the Digia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met: http://www.gnu.org/copyleft/gpl.html.
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "composition.h"
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#include <QBoxLayout>
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#include <QRadioButton>
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#include <QTimer>
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#include <QDateTime>
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#include <QSlider>
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#include <QMouseEvent>
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#include <qmath.h>
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const int animationInterval = 15; // update every 16 ms = ~60FPS
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CompositionWidget::CompositionWidget(QWidget *parent)
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: QWidget(parent)
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{
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CompositionRenderer *view = new CompositionRenderer(this);
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QGroupBox *mainGroup = new QGroupBox(parent);
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mainGroup->setTitle(tr("Composition Modes"));
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QGroupBox *modesGroup = new QGroupBox(mainGroup);
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modesGroup->setTitle(tr("Mode"));
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rbClear = new QRadioButton(tr("Clear"), modesGroup);
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connect(rbClear, SIGNAL(clicked()), view, SLOT(setClearMode()));
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rbSource = new QRadioButton(tr("Source"), modesGroup);
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connect(rbSource, SIGNAL(clicked()), view, SLOT(setSourceMode()));
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rbDest = new QRadioButton(tr("Destination"), modesGroup);
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connect(rbDest, SIGNAL(clicked()), view, SLOT(setDestMode()));
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rbSourceOver = new QRadioButton(tr("Source Over"), modesGroup);
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connect(rbSourceOver, SIGNAL(clicked()), view, SLOT(setSourceOverMode()));
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rbDestOver = new QRadioButton(tr("Destination Over"), modesGroup);
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connect(rbDestOver, SIGNAL(clicked()), view, SLOT(setDestOverMode()));
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rbSourceIn = new QRadioButton(tr("Source In"), modesGroup);
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connect(rbSourceIn, SIGNAL(clicked()), view, SLOT(setSourceInMode()));
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rbDestIn = new QRadioButton(tr("Dest In"), modesGroup);
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connect(rbDestIn, SIGNAL(clicked()), view, SLOT(setDestInMode()));
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rbSourceOut = new QRadioButton(tr("Source Out"), modesGroup);
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connect(rbSourceOut, SIGNAL(clicked()), view, SLOT(setSourceOutMode()));
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rbDestOut = new QRadioButton(tr("Dest Out"), modesGroup);
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connect(rbDestOut, SIGNAL(clicked()), view, SLOT(setDestOutMode()));
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rbSourceAtop = new QRadioButton(tr("Source Atop"), modesGroup);
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connect(rbSourceAtop, SIGNAL(clicked()), view, SLOT(setSourceAtopMode()));
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rbDestAtop = new QRadioButton(tr("Dest Atop"), modesGroup);
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connect(rbDestAtop, SIGNAL(clicked()), view, SLOT(setDestAtopMode()));
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rbXor = new QRadioButton(tr("Xor"), modesGroup);
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connect(rbXor, SIGNAL(clicked()), view, SLOT(setXorMode()));
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rbPlus = new QRadioButton(tr("Plus"), modesGroup);
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connect(rbPlus, SIGNAL(clicked()), view, SLOT(setPlusMode()));
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rbMultiply = new QRadioButton(tr("Multiply"), modesGroup);
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connect(rbMultiply, SIGNAL(clicked()), view, SLOT(setMultiplyMode()));
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rbScreen = new QRadioButton(tr("Screen"), modesGroup);
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connect(rbScreen, SIGNAL(clicked()), view, SLOT(setScreenMode()));
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rbOverlay = new QRadioButton(tr("Overlay"), modesGroup);
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connect(rbOverlay, SIGNAL(clicked()), view, SLOT(setOverlayMode()));
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rbDarken = new QRadioButton(tr("Darken"), modesGroup);
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connect(rbDarken, SIGNAL(clicked()), view, SLOT(setDarkenMode()));
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rbLighten = new QRadioButton(tr("Lighten"), modesGroup);
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connect(rbLighten, SIGNAL(clicked()), view, SLOT(setLightenMode()));
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rbColorDodge = new QRadioButton(tr("Color Dodge"), modesGroup);
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connect(rbColorDodge, SIGNAL(clicked()), view, SLOT(setColorDodgeMode()));
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rbColorBurn = new QRadioButton(tr("Color Burn"), modesGroup);
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connect(rbColorBurn, SIGNAL(clicked()), view, SLOT(setColorBurnMode()));
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rbHardLight = new QRadioButton(tr("Hard Light"), modesGroup);
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connect(rbHardLight, SIGNAL(clicked()), view, SLOT(setHardLightMode()));
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rbSoftLight = new QRadioButton(tr("Soft Light"), modesGroup);
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connect(rbSoftLight, SIGNAL(clicked()), view, SLOT(setSoftLightMode()));
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rbDifference = new QRadioButton(tr("Difference"), modesGroup);
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connect(rbDifference, SIGNAL(clicked()), view, SLOT(setDifferenceMode()));
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rbExclusion = new QRadioButton(tr("Exclusion"), modesGroup);
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connect(rbExclusion, SIGNAL(clicked()), view, SLOT(setExclusionMode()));
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QGroupBox *circleColorGroup = new QGroupBox(mainGroup);
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circleColorGroup->setTitle(tr("Circle color"));
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QSlider *circleColorSlider = new QSlider(Qt::Horizontal, circleColorGroup);
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circleColorSlider->setRange(0, 359);
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circleColorSlider->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
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connect(circleColorSlider, SIGNAL(valueChanged(int)), view, SLOT(setCircleColor(int)));
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QGroupBox *circleAlphaGroup = new QGroupBox(mainGroup);
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circleAlphaGroup->setTitle(tr("Circle alpha"));
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QSlider *circleAlphaSlider = new QSlider(Qt::Horizontal, circleAlphaGroup);
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circleAlphaSlider->setRange(0, 255);
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circleAlphaSlider->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
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connect(circleAlphaSlider, SIGNAL(valueChanged(int)), view, SLOT(setCircleAlpha(int)));
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QPushButton *showSourceButton = new QPushButton(mainGroup);
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showSourceButton->setText(tr("Show Source"));
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#if defined(QT_OPENGL_SUPPORT) && !defined(QT_OPENGL_ES)
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QPushButton *enableOpenGLButton = new QPushButton(mainGroup);
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enableOpenGLButton->setText(tr("Use OpenGL"));
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enableOpenGLButton->setCheckable(true);
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enableOpenGLButton->setChecked(view->usesOpenGL());
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if (!QGLFormat::hasOpenGL() || !QGLPixelBuffer::hasOpenGLPbuffers())
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enableOpenGLButton->hide();
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#endif
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QPushButton *whatsThisButton = new QPushButton(mainGroup);
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whatsThisButton->setText(tr("What's This?"));
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whatsThisButton->setCheckable(true);
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QPushButton *animateButton = new QPushButton(mainGroup);
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animateButton->setText(tr("Animated"));
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animateButton->setCheckable(true);
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animateButton->setChecked(true);
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QHBoxLayout *viewLayout = new QHBoxLayout(this);
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viewLayout->addWidget(view);
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viewLayout->addWidget(mainGroup);
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QVBoxLayout *mainGroupLayout = new QVBoxLayout(mainGroup);
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mainGroupLayout->addWidget(circleColorGroup);
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mainGroupLayout->addWidget(circleAlphaGroup);
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mainGroupLayout->addWidget(modesGroup);
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mainGroupLayout->addStretch();
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mainGroupLayout->addWidget(animateButton);
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mainGroupLayout->addWidget(whatsThisButton);
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mainGroupLayout->addWidget(showSourceButton);
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#if defined(QT_OPENGL_SUPPORT) && !defined(QT_OPENGL_ES)
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mainGroupLayout->addWidget(enableOpenGLButton);
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#endif
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QGridLayout *modesLayout = new QGridLayout(modesGroup);
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modesLayout->addWidget(rbClear, 0, 0);
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modesLayout->addWidget(rbSource, 1, 0);
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modesLayout->addWidget(rbDest, 2, 0);
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modesLayout->addWidget(rbSourceOver, 3, 0);
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modesLayout->addWidget(rbDestOver, 4, 0);
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modesLayout->addWidget(rbSourceIn, 5, 0);
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modesLayout->addWidget(rbDestIn, 6, 0);
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modesLayout->addWidget(rbSourceOut, 7, 0);
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modesLayout->addWidget(rbDestOut, 8, 0);
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modesLayout->addWidget(rbSourceAtop, 9, 0);
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modesLayout->addWidget(rbDestAtop, 10, 0);
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modesLayout->addWidget(rbXor, 11, 0);
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modesLayout->addWidget(rbPlus, 0, 1);
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modesLayout->addWidget(rbMultiply, 1, 1);
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modesLayout->addWidget(rbScreen, 2, 1);
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modesLayout->addWidget(rbOverlay, 3, 1);
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modesLayout->addWidget(rbDarken, 4, 1);
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modesLayout->addWidget(rbLighten, 5, 1);
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modesLayout->addWidget(rbColorDodge, 6, 1);
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modesLayout->addWidget(rbColorBurn, 7, 1);
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modesLayout->addWidget(rbHardLight, 8, 1);
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modesLayout->addWidget(rbSoftLight, 9, 1);
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modesLayout->addWidget(rbDifference, 10, 1);
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modesLayout->addWidget(rbExclusion, 11, 1);
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QVBoxLayout *circleColorLayout = new QVBoxLayout(circleColorGroup);
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circleColorLayout->addWidget(circleColorSlider);
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QVBoxLayout *circleAlphaLayout = new QVBoxLayout(circleAlphaGroup);
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circleAlphaLayout->addWidget(circleAlphaSlider);
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view->loadDescription(":res/composition/composition.html");
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view->loadSourceFile(":res/composition/composition.cpp");
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connect(whatsThisButton, SIGNAL(clicked(bool)), view, SLOT(setDescriptionEnabled(bool)));
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connect(view, SIGNAL(descriptionEnabledChanged(bool)), whatsThisButton, SLOT(setChecked(bool)));
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connect(showSourceButton, SIGNAL(clicked()), view, SLOT(showSource()));
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#if defined(QT_OPENGL_SUPPORT) && !defined(QT_OPENGL_ES)
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connect(enableOpenGLButton, SIGNAL(clicked(bool)), view, SLOT(enableOpenGL(bool)));
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#endif
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connect(animateButton, SIGNAL(toggled(bool)), view, SLOT(setAnimationEnabled(bool)));
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circleColorSlider->setValue(270);
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circleAlphaSlider->setValue(200);
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rbSourceOut->animateClick();
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setWindowTitle(tr("Composition Modes"));
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}
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void CompositionWidget::nextMode()
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{
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/*
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if (!m_animation_enabled)
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return;
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if (rbClear->isChecked()) rbSource->animateClick();
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if (rbSource->isChecked()) rbDest->animateClick();
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if (rbDest->isChecked()) rbSourceOver->animateClick();
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if (rbSourceOver->isChecked()) rbDestOver->animateClick();
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if (rbDestOver->isChecked()) rbSourceIn->animateClick();
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if (rbSourceIn->isChecked()) rbDestIn->animateClick();
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if (rbDestIn->isChecked()) rbSourceOut->animateClick();
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if (rbSourceOut->isChecked()) rbDestOut->animateClick();
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if (rbDestOut->isChecked()) rbSourceAtop->animateClick();
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if (rbSourceAtop->isChecked()) rbDestAtop->animateClick();
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if (rbDestAtop->isChecked()) rbXor->animateClick();
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if (rbXor->isChecked()) rbClear->animateClick();
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*/
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}
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CompositionRenderer::CompositionRenderer(QWidget *parent)
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: ArthurFrame(parent)
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{
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m_animation_enabled = true;
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m_animationTimer = startTimer(animationInterval);
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m_image = QImage(":res/composition/flower.jpg");
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m_image.setAlphaChannel(QImage(":res/composition/flower_alpha.jpg"));
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m_circle_alpha = 127;
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m_circle_hue = 255;
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m_current_object = NoObject;
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m_composition_mode = QPainter::CompositionMode_SourceOut;
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m_circle_pos = QPoint(200, 100);
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setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
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#ifdef QT_OPENGL_SUPPORT
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m_pbuffer = 0;
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m_pbuffer_size = 1024;
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#endif
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}
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QRectF rectangle_around(const QPointF &p, const QSizeF &size = QSize(250, 200))
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{
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QRectF rect(p, size);
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rect.translate(-size.width()/2, -size.height()/2);
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return rect;
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}
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void CompositionRenderer::setAnimationEnabled(bool enabled)
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{
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if (m_animation_enabled == enabled)
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return;
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m_animation_enabled = enabled;
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if (enabled) {
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Q_ASSERT(!m_animationTimer);
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m_animationTimer = startTimer(animationInterval);
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} else {
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killTimer(m_animationTimer);
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m_animationTimer = 0;
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}
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}
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void CompositionRenderer::updateCirclePos()
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{
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if (m_current_object != NoObject)
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return;
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QDateTime dt = QDateTime::currentDateTime();
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qreal t = (dt.toTime_t() * 1000 + dt.time().msec()) / 1000.0;
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qreal x = width() / qreal(2) + (qCos(t*8/11) + qSin(-t)) * width() / qreal(4);
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qreal y = height() / qreal(2) + (qSin(t*6/7) + qCos(t * qreal(1.5))) * height() / qreal(4);
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setCirclePos(QLineF(m_circle_pos, QPointF(x, y)).pointAt(0.02));
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}
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void CompositionRenderer::drawBase(QPainter &p)
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{
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p.setPen(Qt::NoPen);
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QLinearGradient rect_gradient(0, 0, 0, height());
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rect_gradient.setColorAt(0, Qt::red);
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rect_gradient.setColorAt(.17, Qt::yellow);
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rect_gradient.setColorAt(.33, Qt::green);
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rect_gradient.setColorAt(.50, Qt::cyan);
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rect_gradient.setColorAt(.66, Qt::blue);
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rect_gradient.setColorAt(.81, Qt::magenta);
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rect_gradient.setColorAt(1, Qt::red);
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p.setBrush(rect_gradient);
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p.drawRect(width() / 2, 0, width() / 2, height());
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QLinearGradient alpha_gradient(0, 0, width(), 0);
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alpha_gradient.setColorAt(0, Qt::white);
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alpha_gradient.setColorAt(0.2, Qt::white);
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alpha_gradient.setColorAt(0.5, Qt::transparent);
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alpha_gradient.setColorAt(0.8, Qt::white);
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alpha_gradient.setColorAt(1, Qt::white);
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p.setCompositionMode(QPainter::CompositionMode_DestinationIn);
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p.setBrush(alpha_gradient);
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p.drawRect(0, 0, width(), height());
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p.setCompositionMode(QPainter::CompositionMode_DestinationOver);
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p.setPen(Qt::NoPen);
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p.setRenderHint(QPainter::SmoothPixmapTransform);
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p.drawImage(rect(), m_image);
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}
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void CompositionRenderer::drawSource(QPainter &p)
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{
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p.setPen(Qt::NoPen);
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p.setRenderHint(QPainter::Antialiasing);
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p.setCompositionMode(m_composition_mode);
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QRectF circle_rect = rectangle_around(m_circle_pos);
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QColor color = QColor::fromHsvF(m_circle_hue / 360.0, 1, 1, m_circle_alpha / 255.0);
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QLinearGradient circle_gradient(circle_rect.topLeft(), circle_rect.bottomRight());
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circle_gradient.setColorAt(0, color.light());
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circle_gradient.setColorAt(0.5, color);
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circle_gradient.setColorAt(1, color.dark());
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p.setBrush(circle_gradient);
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p.drawEllipse(circle_rect);
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}
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void CompositionRenderer::paint(QPainter *painter)
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{
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#if defined(QT_OPENGL_SUPPORT) && !defined(QT_OPENGL_ES)
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if (usesOpenGL()) {
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int new_pbuf_size = m_pbuffer_size;
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if (size().width() > m_pbuffer_size || size().height() > m_pbuffer_size)
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new_pbuf_size *= 2;
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if (size().width() < m_pbuffer_size/2 && size().height() < m_pbuffer_size/2)
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new_pbuf_size /= 2;
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if (!m_pbuffer || new_pbuf_size != m_pbuffer_size) {
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if (m_pbuffer) {
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m_pbuffer->deleteTexture(m_base_tex);
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m_pbuffer->deleteTexture(m_compositing_tex);
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delete m_pbuffer;
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}
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m_pbuffer = new QGLPixelBuffer(QSize(new_pbuf_size, new_pbuf_size), QGLFormat::defaultFormat(), glWidget());
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m_pbuffer->makeCurrent();
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m_base_tex = m_pbuffer->generateDynamicTexture();
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m_compositing_tex = m_pbuffer->generateDynamicTexture();
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m_pbuffer_size = new_pbuf_size;
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}
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if (size() != m_previous_size) {
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m_previous_size = size();
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QPainter p(m_pbuffer);
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p.setCompositionMode(QPainter::CompositionMode_Source);
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p.fillRect(QRect(0, 0, m_pbuffer->width(), m_pbuffer->height()), Qt::transparent);
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drawBase(p);
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p.end();
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m_pbuffer->updateDynamicTexture(m_base_tex);
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}
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qreal x_fraction = width()/float(m_pbuffer->width());
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qreal y_fraction = height()/float(m_pbuffer->height());
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{
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QPainter p(m_pbuffer);
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p.setCompositionMode(QPainter::CompositionMode_Source);
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p.fillRect(QRect(0, 0, m_pbuffer->width(), m_pbuffer->height()), Qt::transparent);
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p.save(); // Needed when using the GL1 engine
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p.beginNativePainting(); // Needed when using the GL2 engine
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glBindTexture(GL_TEXTURE_2D, m_base_tex);
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glEnable(GL_TEXTURE_2D);
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glColor4f(1.,1.,1.,1.);
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glBegin(GL_QUADS);
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{
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glTexCoord2f(0, 1.0);
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glVertex2f(0, 0);
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glTexCoord2f(x_fraction, 1.0);
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glVertex2f(width(), 0);
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glTexCoord2f(x_fraction, 1.0-y_fraction);
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glVertex2f(width(), height());
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glTexCoord2f(0, 1.0-y_fraction);
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glVertex2f(0, height());
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}
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glEnd();
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glDisable(GL_TEXTURE_2D);
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p.endNativePainting(); // Needed when using the GL2 engine
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p.restore(); // Needed when using the GL1 engine
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drawSource(p);
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p.end();
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m_pbuffer->updateDynamicTexture(m_compositing_tex);
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}
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painter->beginNativePainting(); // Needed when using the GL2 engine
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glWidget()->makeCurrent(); // Needed when using the GL1 engine
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glBindTexture(GL_TEXTURE_2D, m_compositing_tex);
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glEnable(GL_TEXTURE_2D);
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glEnable(GL_BLEND);
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glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
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glColor4f(1.,1.,1.,1.);
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glBegin(GL_QUADS);
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{
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glTexCoord2f(0, 1.0);
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glVertex2f(0, 0);
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|
|
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);
|
|
painter->endNativePainting(); // Needed when using the GL2 engine
|
|
} 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.byteCount());
|
|
|
|
{
|
|
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();
|
|
#if defined(QT_OPENGL_SUPPORT) && !defined(QT_OPENGL_ES)
|
|
if (usesOpenGL()) {
|
|
update();
|
|
return;
|
|
}
|
|
#endif
|
|
update(oldRect | newRect);
|
|
}
|
|
|