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Diffstat (limited to 'examples/opengl/samplebuffers/glwidget.cpp')
| -rw-r--r-- | examples/opengl/samplebuffers/glwidget.cpp | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/examples/opengl/samplebuffers/glwidget.cpp b/examples/opengl/samplebuffers/glwidget.cpp new file mode 100644 index 0000000000..537dbd9bba --- /dev/null +++ b/examples/opengl/samplebuffers/glwidget.cpp @@ -0,0 +1,164 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the examples of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:BSD$ +** You may use this file under the terms of the BSD license as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor +** the names of its contributors may be used to endorse or promote +** products derived from this software without specific prior written +** permission. +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#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 qtGreen(QColor::fromCmykF(0.40, 0.0, 1.0, 0.0)); + const double Pi = 3.14159265358979323846; + const int NumSectors = 15; + GLdouble x1 = +0.06; + GLdouble y1 = -0.14; + GLdouble x2 = +0.14; + GLdouble y2 = -0.06; + GLdouble x3 = +0.08; + GLdouble y3 = +0.00; + GLdouble x4 = +0.30; + GLdouble y4 = +0.22; + + list = glGenLists(1); + glNewList(list, GL_COMPILE); + { + for (int i = 0; i < NumSectors; ++i) { + double angle1 = (i * 2 * Pi) / NumSectors; + GLdouble x5 = 0.30 * sin(angle1); + GLdouble y5 = 0.30 * cos(angle1); + GLdouble x6 = 0.20 * sin(angle1); + GLdouble y6 = 0.20 * cos(angle1); + + double angle2 = ((i + 1) * 2 * Pi) / NumSectors; + GLdouble x7 = 0.20 * sin(angle2); + GLdouble y7 = 0.20 * cos(angle2); + GLdouble x8 = 0.30 * sin(angle2); + GLdouble y8 = 0.30 * cos(angle2); + + qglColor(qtGreen); + quad(GL_QUADS, x5, y5, x6, y6, x7, y7, x8, y8); + qglColor(Qt::black); + quad(GL_LINE_LOOP, x5, y5, x6, y6, x7, y7, x8, y8); + } + + qglColor(qtGreen); + quad(GL_QUADS, x1, y1, x2, y2, y2, x2, y1, x1); + quad(GL_QUADS, x3, y3, x4, y4, y4, x4, y3, x3); + + qglColor(Qt::black); + quad(GL_LINE_LOOP, x1, y1, x2, y2, y2, x2, y1, x1); + quad(GL_LINE_LOOP, x3, y3, x4, y4, y4, x4, y3, x3); + } + 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(); +} |