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Diffstat (limited to 'examples/opengl/samplebuffers/glwidget.cpp')
| -rw-r--r-- | examples/opengl/samplebuffers/glwidget.cpp | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/examples/opengl/samplebuffers/glwidget.cpp b/examples/opengl/samplebuffers/glwidget.cpp new file mode 100644 index 0000000..0bc17aa --- /dev/null +++ b/examples/opengl/samplebuffers/glwidget.cpp @@ -0,0 +1,149 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (qt-info@nokia.com) +** +** This file is part of the examples of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain +** additional rights. These rights are described in the Nokia Qt LGPL +** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this +** package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 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 the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at qt-sales@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "glwidget.h" +#include <math.h> + +#ifndef GL_MULTISAMPLE +#define GL_MULTISAMPLE 0x809D +#endif + +GLWidget::GLWidget(QWidget *parent) + : QGLWidget(QGLFormat(QGL::SampleBuffers), parent) +{ + startTimer(40); + setWindowTitle(tr("Sample Buffers")); +} + +void GLWidget::initializeGL() +{ + glMatrixMode(GL_PROJECTION); + glLoadIdentity(); + glOrtho(-.5, .5, .5, -.5, -1000, 1000); + glMatrixMode(GL_MODELVIEW); + glLoadIdentity(); + glClearColor(1.0f, 1.0f, 1.0f, 1.0f); + + makeObject(); +} + +void GLWidget::resizeGL(int w, int h) +{ + glViewport(0, 0, w, h); +} + +void GLWidget::paintGL() +{ + static float rot = 0.0; + glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); + + glMatrixMode(GL_MODELVIEW); + glPushMatrix(); + glEnable(GL_MULTISAMPLE); + glTranslatef(-0.25f, -0.10f, 0.0f); + glScalef(0.75f, 1.15f, 0.0f); + glRotatef(rot, 0.0f, 0.f, 1.0f); + glCallList(list); + glPopMatrix(); + + glPushMatrix(); + glDisable(GL_MULTISAMPLE); + glTranslatef(0.25f, -0.10f, 0.0f); + glScalef(0.75f, 1.15f, 0.0f); + glRotatef(rot, 0.0f, 0.0f, 1.0f); + glCallList(list); + glPopMatrix(); + + rot += 0.2f; + + qglColor(Qt::black); + renderText(-0.35, 0.4, 0.0, "Multisampling enabled"); + renderText(0.15, 0.4, 0.0, "Multisampling disabled"); +} + +void GLWidget::timerEvent(QTimerEvent *) +{ + update(); +} + +void GLWidget::makeObject() +{ + QColor trolltechGreen(QColor::fromCmykF(0.40, 0.0, 1.0, 0.0)); + const double Pi = 3.14159265358979323846; + const int NumSectors = 15; + + list = glGenLists(1); + glNewList(list, GL_COMPILE); + { + for (int i = 0; i < NumSectors; ++i) { + double angle1 = (i * 2 * Pi) / NumSectors; + GLdouble x1 = 0.30 * sin(angle1); + GLdouble y1 = 0.30 * cos(angle1); + GLdouble x2 = 0.20 * sin(angle1); + GLdouble y2 = 0.20 * cos(angle1); + + double angle2 = ((i + 1) * 2 * Pi) / NumSectors; + GLdouble x3 = 0.20 * sin(angle2); + GLdouble y3 = 0.20 * cos(angle2); + GLdouble x4 = 0.30 * sin(angle2); + GLdouble y4 = 0.30 * cos(angle2); + + qglColor(trolltechGreen); + quad(GL_QUADS, x1, y1, x2, y2, x3, y3, x4, y4); + qglColor(Qt::black); + quad(GL_LINE_LOOP, x1, y1, x2, y2, x3, y3, x4, y4); + } + } + glEndList(); +} + +void GLWidget::quad(GLenum primitive, GLdouble x1, GLdouble y1, GLdouble x2, GLdouble y2, + GLdouble x3, GLdouble y3, GLdouble x4, GLdouble y4) +{ + glBegin(primitive); + { + glVertex2d(x1, y1); + glVertex2d(x2, y2); + glVertex2d(x3, y3); + glVertex2d(x4, y4); + } + glEnd(); +} |