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-rw-r--r--examples/opengl/qopenglwidget/bubble.cpp139
-rw-r--r--examples/opengl/qopenglwidget/bubble.h76
-rw-r--r--examples/opengl/qopenglwidget/glwidget.cpp489
-rw-r--r--examples/opengl/qopenglwidget/glwidget.h112
-rw-r--r--examples/opengl/qopenglwidget/main.cpp52
-rw-r--r--examples/opengl/qopenglwidget/mainwindow.cpp152
-rw-r--r--examples/opengl/qopenglwidget/mainwindow.h66
-rw-r--r--examples/opengl/qopenglwidget/qopenglwidget.pro15
-rw-r--r--examples/opengl/qopenglwidget/qt.pngbin0 -> 5174 bytes
-rw-r--r--examples/opengl/qopenglwidget/texture.qrc5
10 files changed, 1106 insertions, 0 deletions
diff --git a/examples/opengl/qopenglwidget/bubble.cpp b/examples/opengl/qopenglwidget/bubble.cpp
new file mode 100644
index 0000000000..bf04c64966
--- /dev/null
+++ b/examples/opengl/qopenglwidget/bubble.cpp
@@ -0,0 +1,139 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** 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 Digia Plc 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 <QtWidgets>
+
+#include "bubble.h"
+
+Bubble::Bubble(const QPointF &position, qreal radius, const QPointF &velocity)
+ : position(position), vel(velocity), radius(radius)
+{
+ innerColor = randomColor();
+ outerColor = randomColor();
+ cache = 0;
+ updateBrush();
+}
+
+//! [0]
+void Bubble::updateCache()
+{
+ if (cache)
+ delete cache;
+ cache = new QImage(qRound(radius * 2 + 2), qRound(radius * 2 + 2), QImage::Format_ARGB32);
+ cache->fill(0x00000000);
+ QPainter p(cache);
+ p.setRenderHint(QPainter::HighQualityAntialiasing);
+ QPen pen(Qt::white);
+ pen.setWidth(2);
+ p.setPen(pen);
+ p.setBrush(brush);
+ p.drawEllipse(0, 0, int(2*radius), int(2*radius));
+}
+//! [0]
+
+Bubble::~Bubble()
+{
+ if (cache)
+ delete cache;
+}
+
+void Bubble::updateBrush()
+{
+ QRadialGradient gradient(QPointF(radius, radius), radius,
+ QPointF(radius*0.5, radius*0.5));
+
+ gradient.setColorAt(0, QColor(255, 255, 255, 255));
+ gradient.setColorAt(0.25, innerColor);
+ gradient.setColorAt(1, outerColor);
+ brush = QBrush(gradient);
+ updateCache();
+}
+
+//! [1]
+void Bubble::drawBubble(QPainter *painter)
+{
+ painter->save();
+ painter->translate(position.x() - radius, position.y() - radius);
+ painter->setOpacity(0.8);
+ painter->drawImage(0, 0, *cache);
+ painter->restore();
+}
+//! [1]
+
+QColor Bubble::randomColor()
+{
+ int red = int(185 + 70.0*qrand()/(RAND_MAX+1.0));
+ int green = int(185 + 70.0*qrand()/(RAND_MAX+1.0));
+ int blue = int(205 + 50.0*qrand()/(RAND_MAX+1.0));
+ int alpha = int(91 + 100.0*qrand()/(RAND_MAX+1.0));
+
+ return QColor(red, green, blue, alpha);
+}
+
+void Bubble::move(const QRect &bbox)
+{
+ position += vel;
+ qreal leftOverflow = position.x() - radius - bbox.left();
+ qreal rightOverflow = position.x() + radius - bbox.right();
+ qreal topOverflow = position.y() - radius - bbox.top();
+ qreal bottomOverflow = position.y() + radius - bbox.bottom();
+
+ if (leftOverflow < 0.0) {
+ position.setX(position.x() - 2 * leftOverflow);
+ vel.setX(-vel.x());
+ } else if (rightOverflow > 0.0) {
+ position.setX(position.x() - 2 * rightOverflow);
+ vel.setX(-vel.x());
+ }
+
+ if (topOverflow < 0.0) {
+ position.setY(position.y() - 2 * topOverflow);
+ vel.setY(-vel.y());
+ } else if (bottomOverflow > 0.0) {
+ position.setY(position.y() - 2 * bottomOverflow);
+ vel.setY(-vel.y());
+ }
+}
+
+QRectF Bubble::rect()
+{
+ return QRectF(position.x() - radius, position.y() - radius,
+ 2 * radius, 2 * radius);
+}
diff --git a/examples/opengl/qopenglwidget/bubble.h b/examples/opengl/qopenglwidget/bubble.h
new file mode 100644
index 0000000000..ea33466ef7
--- /dev/null
+++ b/examples/opengl/qopenglwidget/bubble.h
@@ -0,0 +1,76 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** 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 Digia Plc 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."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef BUBBLE_H
+#define BUBBLE_H
+
+#include <QBrush>
+#include <QColor>
+#include <QPointF>
+#include <QRect>
+#include <QRectF>
+
+QT_FORWARD_DECLARE_CLASS(QPainter)
+
+class Bubble
+{
+public:
+ Bubble(const QPointF &position, qreal radius, const QPointF &velocity);
+ ~Bubble();
+
+ void drawBubble(QPainter *painter);
+ void updateBrush();
+ void move(const QRect &bbox);
+ void updateCache();
+ QRectF rect();
+
+private:
+ QColor randomColor();
+
+ QBrush brush;
+ QPointF position;
+ QPointF vel;
+ qreal radius;
+ QColor innerColor;
+ QColor outerColor;
+ QImage *cache;
+};
+
+#endif
diff --git a/examples/opengl/qopenglwidget/glwidget.cpp b/examples/opengl/qopenglwidget/glwidget.cpp
new file mode 100644
index 0000000000..e95ca363fc
--- /dev/null
+++ b/examples/opengl/qopenglwidget/glwidget.cpp
@@ -0,0 +1,489 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** 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 Digia Plc 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 <QPainter>
+#include <QPaintEngine>
+#include <math.h>
+
+#include "mainwindow.h"
+#include "bubble.h"
+
+const int bubbleNum = 8;
+
+GLWidget::GLWidget(MainWindow *mw, bool button, const QColor &background)
+ : m_mainWindow(mw),
+ m_transparent(false),
+ m_btn(0),
+ m_hasButton(button),
+ m_background(background)
+{
+ QSurfaceFormat format;
+ format.setDepthBufferSize(24);
+ format.setStencilBufferSize(8);
+ setFormat(format);
+
+ qtLogo = true;
+ frames = 0;
+ m_showBubbles = true;
+ setMinimumSize(300, 250);
+}
+
+GLWidget::~GLWidget()
+{
+}
+
+void GLWidget::setScaling(int scale) {
+
+ if (scale > 30)
+ m_fScale = 1 + qreal(scale - 30) / 30 * 0.25;
+ else if (scale < 30)
+ m_fScale = 1 - (qreal(30 - scale) / 30 * 0.25);
+ else
+ m_fScale = 1;
+}
+
+void GLWidget::setLogo() {
+ qtLogo = true;
+}
+
+void GLWidget::setTexture() {
+ qtLogo = false;
+}
+
+void GLWidget::showBubbles(bool bubbles)
+{
+ m_showBubbles = bubbles;
+}
+
+void GLWidget::paintQtLogo()
+{
+ program1.enableAttributeArray(normalAttr1);
+ program1.enableAttributeArray(vertexAttr1);
+ program1.setAttributeArray(vertexAttr1, vertices.constData());
+ program1.setAttributeArray(normalAttr1, normals.constData());
+ glDrawArrays(GL_TRIANGLES, 0, vertices.size());
+ program1.disableAttributeArray(normalAttr1);
+ program1.disableAttributeArray(vertexAttr1);
+}
+
+void GLWidget::paintTexturedCube()
+{
+ glBindTexture(GL_TEXTURE_2D, m_uiTexture);
+ GLfloat afVertices[] = {
+ -0.5, 0.5, 0.5, 0.5,-0.5,0.5,-0.5,-0.5,0.5,
+ 0.5, -0.5, 0.5, -0.5,0.5,0.5,0.5,0.5,0.5,
+ -0.5, -0.5, -0.5, 0.5,-0.5,-0.5,-0.5,0.5,-0.5,
+ 0.5, 0.5, -0.5, -0.5,0.5,-0.5,0.5,-0.5,-0.5,
+
+ 0.5, -0.5, -0.5, 0.5,-0.5,0.5,0.5,0.5,-0.5,
+ 0.5, 0.5, 0.5, 0.5,0.5,-0.5,0.5,-0.5,0.5,
+ -0.5, 0.5, -0.5, -0.5,-0.5,0.5,-0.5,-0.5,-0.5,
+ -0.5, -0.5, 0.5, -0.5,0.5,-0.5,-0.5,0.5,0.5,
+
+ 0.5, 0.5, -0.5, -0.5, 0.5, 0.5, -0.5, 0.5, -0.5,
+ -0.5, 0.5, 0.5, 0.5, 0.5, -0.5, 0.5, 0.5, 0.5,
+ -0.5, -0.5, -0.5, -0.5, -0.5, 0.5, 0.5, -0.5, -0.5,
+ 0.5, -0.5, 0.5, 0.5, -0.5, -0.5, -0.5, -0.5, 0.5
+ };
+ program2.setAttributeArray(vertexAttr2, afVertices, 3);
+
+ GLfloat afTexCoord[] = {
+ 0.0f,0.0f, 1.0f,1.0f, 1.0f,0.0f,
+ 1.0f,1.0f, 0.0f,0.0f, 0.0f,1.0f,
+ 1.0f,1.0f, 1.0f,0.0f, 0.0f,1.0f,
+ 0.0f,0.0f, 0.0f,1.0f, 1.0f,0.0f,
+
+ 1.0f,1.0f, 1.0f,0.0f, 0.0f,1.0f,
+ 0.0f,0.0f, 0.0f,1.0f, 1.0f,0.0f,
+ 0.0f,0.0f, 1.0f,1.0f, 1.0f,0.0f,
+ 1.0f,1.0f, 0.0f,0.0f, 0.0f,1.0f,
+
+ 0.0f,1.0f, 1.0f,0.0f, 1.0f,1.0f,
+ 1.0f,0.0f, 0.0f,1.0f, 0.0f,0.0f,
+ 1.0f,0.0f, 1.0f,1.0f, 0.0f,0.0f,
+ 0.0f,1.0f, 0.0f,0.0f, 1.0f,1.0f
+ };
+ program2.setAttributeArray(texCoordAttr2, afTexCoord, 2);
+
+ GLfloat afNormals[] = {
+
+ 0,0,-1, 0,0,-1, 0,0,-1,
+ 0,0,-1, 0,0,-1, 0,0,-1,
+ 0,0,1, 0,0,1, 0,0,1,
+ 0,0,1, 0,0,1, 0,0,1,
+
+ -1,0,0, -1,0,0, -1,0,0,
+ -1,0,0, -1,0,0, -1,0,0,
+ 1,0,0, 1,0,0, 1,0,0,
+ 1,0,0, 1,0,0, 1,0,0,
+
+ 0,-1,0, 0,-1,0, 0,-1,0,
+ 0,-1,0, 0,-1,0, 0,-1,0,
+ 0,1,0, 0,1,0, 0,1,0,
+ 0,1,0, 0,1,0, 0,1,0
+ };
+ program2.setAttributeArray(normalAttr2, afNormals, 3);
+
+ program2.setUniformValue(textureUniform2, 0); // use texture unit 0
+
+ program2.enableAttributeArray(vertexAttr2);
+ program2.enableAttributeArray(normalAttr2);
+ program2.enableAttributeArray(texCoordAttr2);
+
+ glDrawArrays(GL_TRIANGLES, 0, 36);
+
+ program2.disableAttributeArray(vertexAttr2);
+ program2.disableAttributeArray(normalAttr2);
+ program2.disableAttributeArray(texCoordAttr2);
+}
+
+void GLWidget::initializeGL ()
+{
+ initializeOpenGLFunctions();
+
+ glGenTextures(1, &m_uiTexture);
+ QImage img = QImage(":/qt.png").convertToFormat(QImage::Format_RGBA8888);
+ glBindTexture(GL_TEXTURE_2D, m_uiTexture);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+ glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, img.width(), img.height(), 0, GL_RGBA, GL_UNSIGNED_BYTE, img.constBits());
+
+ QOpenGLShader *vshader1 = new QOpenGLShader(QOpenGLShader::Vertex, this);
+ const char *vsrc1 =
+ "attribute highp vec4 vertex;\n"
+ "attribute mediump vec3 normal;\n"
+ "uniform mediump mat4 matrix;\n"
+ "varying mediump vec4 color;\n"
+ "void main(void)\n"
+ "{\n"
+ " vec3 toLight = normalize(vec3(0.0, 0.3, 1.0));\n"
+ " float angle = max(dot(normal, toLight), 0.0);\n"
+ " vec3 col = vec3(0.40, 1.0, 0.0);\n"
+ " color = vec4(col * 0.2 + col * 0.8 * angle, 1.0);\n"
+ " color = clamp(color, 0.0, 1.0);\n"
+ " gl_Position = matrix * vertex;\n"
+ "}\n";
+ vshader1->compileSourceCode(vsrc1);
+
+ QOpenGLShader *fshader1 = new QOpenGLShader(QOpenGLShader::Fragment, this);
+ const char *fsrc1 =
+ "varying mediump vec4 color;\n"
+ "void main(void)\n"
+ "{\n"
+ " gl_FragColor = color;\n"
+ "}\n";
+ fshader1->compileSourceCode(fsrc1);
+
+ program1.addShader(vshader1);
+ program1.addShader(fshader1);
+ program1.link();
+
+ vertexAttr1 = program1.attributeLocation("vertex");
+ normalAttr1 = program1.attributeLocation("normal");
+ matrixUniform1 = program1.uniformLocation("matrix");
+
+ QOpenGLShader *vshader2 = new QOpenGLShader(QOpenGLShader::Vertex);
+ const char *vsrc2 =
+ "attribute highp vec4 vertex;\n"
+ "attribute highp vec4 texCoord;\n"
+ "attribute mediump vec3 normal;\n"
+ "uniform mediump mat4 matrix;\n"
+ "varying highp vec4 texc;\n"
+ "varying mediump float angle;\n"
+ "void main(void)\n"
+ "{\n"
+ " vec3 toLight = normalize(vec3(0.0, 0.3, 1.0));\n"
+ " angle = max(dot(normal, toLight), 0.0);\n"
+ " gl_Position = matrix * vertex;\n"
+ " texc = texCoord;\n"
+ "}\n";
+ vshader2->compileSourceCode(vsrc2);
+
+ QOpenGLShader *fshader2 = new QOpenGLShader(QOpenGLShader::Fragment);
+ const char *fsrc2 =
+ "varying highp vec4 texc;\n"
+ "uniform sampler2D tex;\n"
+ "varying mediump float angle;\n"
+ "void main(void)\n"
+ "{\n"
+ " highp vec3 color = texture2D(tex, texc.st).rgb;\n"
+ " color = color * 0.2 + color * 0.8 * angle;\n"
+ " gl_FragColor = vec4(clamp(color, 0.0, 1.0), 1.0);\n"
+ "}\n";
+ fshader2->compileSourceCode(fsrc2);
+
+ program2.addShader(vshader2);
+ program2.addShader(fshader2);
+ program2.link();
+
+ vertexAttr2 = program2.attributeLocation("vertex");
+ normalAttr2 = program2.attributeLocation("normal");
+ texCoordAttr2 = program2.attributeLocation("texCoord");
+ matrixUniform2 = program2.uniformLocation("matrix");
+ textureUniform2 = program2.uniformLocation("tex");
+
+ m_fAngle = 0;
+ m_fScale = 1;
+ createGeometry();
+ createBubbles(bubbleNum - bubbles.count());
+}
+
+void GLWidget::paintGL()
+{
+ createBubbles(bubbleNum - bubbles.count());
+
+ QPainter painter;
+ painter.begin(this);
+
+ painter.beginNativePainting();
+
+ glClearColor(m_background.red() / 255.0f, m_background.green() / 255.0f,
+ m_background.blue() / 255.0f, m_transparent ? 0.0f : 1.0f);
+ glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+ glFrontFace(GL_CW);
+ glCullFace(GL_FRONT);
+ glEnable(GL_CULL_FACE);
+ glEnable(GL_DEPTH_TEST);
+
+ QMatrix4x4 modelview;
+ modelview.rotate(m_fAngle, 0.0f, 1.0f, 0.0f);
+ modelview.rotate(m_fAngle, 1.0f, 0.0f, 0.0f);
+ modelview.rotate(m_fAngle, 0.0f, 0.0f, 1.0f);
+ modelview.scale(m_fScale);
+ modelview.translate(0.0f, -0.2f, 0.0f);
+
+ if (qtLogo) {
+ program1.bind();
+ program1.setUniformValue(matrixUniform1, modelview);
+ paintQtLogo();
+ program1.release();
+ } else {
+ program2.bind();
+ program1.setUniformValue(matrixUniform2, modelview);
+ paintTexturedCube();
+ program2.release();
+ }
+
+ glDisable(GL_DEPTH_TEST);
+ glDisable(GL_CULL_FACE);
+
+ painter.endNativePainting();
+
+ if (m_showBubbles)
+ foreach (Bubble *bubble, bubbles) {
+ bubble->drawBubble(&painter);
+ }
+
+ if (const int elapsed = time.elapsed()) {
+ QString framesPerSecond;
+ framesPerSecond.setNum(frames /(elapsed / 1000.0), 'f', 2);
+ painter.setPen(m_transparent ? Qt::black : Qt::white);
+ painter.drawText(20, 40, framesPerSecond + " paintGL calls / s");
+ }
+
+ painter.end();
+
+ QMutableListIterator<Bubble*> iter(bubbles);
+
+ while (iter.hasNext()) {
+ Bubble *bubble = iter.next();
+ bubble->move(rect());
+ }
+ if (!(frames % 100)) {
+ time.start();
+ frames = 0;
+ }
+ m_fAngle += 1.0f;
+ frames ++;
+}
+
+void GLWidget::createBubbles(int number)
+{
+ for (int i = 0; i < number; ++i) {
+ QPointF position(width()*(0.1 + (0.8*qrand()/(RAND_MAX+1.0))),
+ height()*(0.1 + (0.8*qrand()/(RAND_MAX+1.0))));
+ qreal radius = qMin(width(), height())*(0.0175 + 0.0875*qrand()/(RAND_MAX+1.0));
+ QPointF velocity(width()*0.0175*(-0.5 + qrand()/(RAND_MAX+1.0)),
+ height()*0.0175*(-0.5 + qrand()/(RAND_MAX+1.0)));
+
+ bubbles.append(new Bubble(position, radius, velocity));
+ }
+}
+
+void GLWidget::createGeometry()
+{
+ vertices.clear();
+ normals.clear();
+
+ qreal x1 = +0.06f;
+ qreal y1 = -0.14f;
+ qreal x2 = +0.14f;
+ qreal y2 = -0.06f;
+ qreal x3 = +0.08f;
+ qreal y3 = +0.00f;
+ qreal x4 = +0.30f;
+ qreal y4 = +0.22f;
+
+ quad(x1, y1, x2, y2, y2, x2, y1, x1);
+ quad(x3, y3, x4, y4, y4, x4, y3, x3);
+
+ extrude(x1, y1, x2, y2);
+ extrude(x2, y2, y2, x2);
+ extrude(y2, x2, y1, x1);
+ extrude(y1, x1, x1, y1);
+ extrude(x3, y3, x4, y4);
+ extrude(x4, y4, y4, x4);
+ extrude(y4, x4, y3, x3);
+
+ const qreal Pi = 3.14159f;
+ const int NumSectors = 100;
+
+ for (int i = 0; i < NumSectors; ++i) {
+ qreal angle1 = (i * 2 * Pi) / NumSectors;
+ qreal x5 = 0.30 * sin(angle1);
+ qreal y5 = 0.30 * cos(angle1);
+ qreal x6 = 0.20 * sin(angle1);
+ qreal y6 = 0.20 * cos(angle1);
+
+ qreal angle2 = ((i + 1) * 2 * Pi) / NumSectors;
+ qreal x7 = 0.20 * sin(angle2);
+ qreal y7 = 0.20 * cos(angle2);
+ qreal x8 = 0.30 * sin(angle2);
+ qreal y8 = 0.30 * cos(angle2);
+
+ quad(x5, y5, x6, y6, x7, y7, x8, y8);
+
+ extrude(x6, y6, x7, y7);
+ extrude(x8, y8, x5, y5);
+ }
+
+ for (int i = 0;i < vertices.size();i++)
+ vertices[i] *= 2.0f;
+}
+
+void GLWidget::quad(qreal x1, qreal y1, qreal x2, qreal y2, qreal x3, qreal y3, qreal x4, qreal y4)
+{
+ vertices << QVector3D(x1, y1, -0.05f);
+ vertices << QVector3D(x2, y2, -0.05f);
+ vertices << QVector3D(x4, y4, -0.05f);
+
+ vertices << QVector3D(x3, y3, -0.05f);
+ vertices << QVector3D(x4, y4, -0.05f);
+ vertices << QVector3D(x2, y2, -0.05f);
+
+ QVector3D n = QVector3D::normal
+ (QVector3D(x2 - x1, y2 - y1, 0.0f), QVector3D(x4 - x1, y4 - y1, 0.0f));
+
+ normals << n;
+ normals << n;
+ normals << n;
+
+ normals << n;
+ normals << n;
+ normals << n;
+
+ vertices << QVector3D(x4, y4, 0.05f);
+ vertices << QVector3D(x2, y2, 0.05f);
+ vertices << QVector3D(x1, y1, 0.05f);
+
+ vertices << QVector3D(x2, y2, 0.05f);
+ vertices << QVector3D(x4, y4, 0.05f);
+ vertices << QVector3D(x3, y3, 0.05f);
+
+ n = QVector3D::normal
+ (QVector3D(x2 - x4, y2 - y4, 0.0f), QVector3D(x1 - x4, y1 - y4, 0.0f));
+
+ normals << n;
+ normals << n;
+ normals << n;
+
+ normals << n;
+ normals << n;
+ normals << n;
+}
+
+void GLWidget::extrude(qreal x1, qreal y1, qreal x2, qreal y2)
+{
+ vertices << QVector3D(x1, y1, +0.05f);
+ vertices << QVector3D(x2, y2, +0.05f);
+ vertices << QVector3D(x1, y1, -0.05f);
+
+ vertices << QVector3D(x2, y2, -0.05f);
+ vertices << QVector3D(x1, y1, -0.05f);
+ vertices << QVector3D(x2, y2, +0.05f);
+
+ QVector3D n = QVector3D::normal
+ (QVector3D(x2 - x1, y2 - y1, 0.0f), QVector3D(0.0f, 0.0f, -0.1f));
+
+ normals << n;
+ normals << n;
+ normals << n;
+
+ normals << n;
+ normals << n;
+ normals << n;
+}
+
+void GLWidget::setTransparent(bool transparent)
+{
+ setAttribute(Qt::WA_AlwaysStackOnTop, transparent);
+ m_transparent = transparent;
+ // Call update() on the top-level window after toggling AlwayStackOnTop to make sure
+ // the entire backingstore is updated accordingly.
+ window()->update();
+}
+
+void GLWidget::resizeGL(int w, int h)
+{
+ if (m_hasButton) {
+ if (!m_btn) {
+ m_btn = new QPushButton("A widget on top.\nPress me!", this);
+ connect(m_btn, &QPushButton::clicked, this, &GLWidget::handleButtonPress);
+ }
+ m_btn->move(w / 2, h / 2);
+ }
+}
+
+void GLWidget::handleButtonPress()
+{
+ m_mainWindow->addNew();
+}
diff --git a/examples/opengl/qopenglwidget/glwidget.h b/examples/opengl/qopenglwidget/glwidget.h
new file mode 100644
index 0000000000..6c43ac1576
--- /dev/null
+++ b/examples/opengl/qopenglwidget/glwidget.h
@@ -0,0 +1,112 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** 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 Digia Plc 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."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef GLWIDGET_H
+#define GLWIDGET_H
+
+#include <QOpenGLWidget>
+#include <QOpenGLFunctions>
+#include <QOpenGLShaderProgram>
+#include <QVector3D>
+#include <QMatrix4x4>
+#include <QTime>
+#include <QVector>
+#include <QPushButton>
+
+class Bubble;
+class MainWindow;
+
+class GLWidget : public QOpenGLWidget, protected QOpenGLFunctions
+{
+ Q_OBJECT
+public:
+ GLWidget(MainWindow *mw, bool button, const QColor &background);
+ ~GLWidget();
+
+public slots:
+ void setScaling(int scale);
+ void setLogo();
+ void setTexture();
+ void showBubbles(bool);
+ void setTransparent(bool transparent);
+
+private slots:
+ void handleButtonPress();
+
+protected:
+ void resizeGL(int w, int h) Q_DECL_OVERRIDE;
+ void paintGL() Q_DECL_OVERRIDE;
+ void initializeGL() Q_DECL_OVERRIDE;
+
+private:
+ MainWindow *m_mainWindow;
+ GLuint m_uiTexture;
+ qreal m_fAngle;
+ qreal m_fScale;
+ bool m_showBubbles;
+ void paintTexturedCube();
+ void paintQtLogo();
+ void createGeometry();
+ void createBubbles(int number);
+ void quad(qreal x1, qreal y1, qreal x2, qreal y2, qreal x3, qreal y3, qreal x4, qreal y4);
+ void extrude(qreal x1, qreal y1, qreal x2, qreal y2);
+ QVector<QVector3D> vertices;
+ QVector<QVector3D> normals;
+ bool qtLogo;
+ QList<Bubble*> bubbles;
+ int frames;
+ QTime time;
+ QOpenGLShaderProgram program1;
+ QOpenGLShaderProgram program2;
+ int vertexAttr1;
+ int normalAttr1;
+ int matrixUniform1;
+ int vertexAttr2;
+ int normalAttr2;
+ int texCoordAttr2;
+ int matrixUniform2;
+ int textureUniform2;
+ bool m_transparent;
+ QPushButton *m_btn;
+ bool m_hasButton;
+ QColor m_background;
+};
+
+#endif
diff --git a/examples/opengl/qopenglwidget/main.cpp b/examples/opengl/qopenglwidget/main.cpp
new file mode 100644
index 0000000000..2156e60155
--- /dev/null
+++ b/examples/opengl/qopenglwidget/main.cpp
@@ -0,0 +1,52 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** 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 Digia Plc 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 <QApplication>
+#include <QMainWindow>
+#include "mainwindow.h"
+
+int main( int argc, char ** argv )
+{
+ Q_INIT_RESOURCE(texture);
+ QApplication a( argc, argv );
+ MainWindow mw;
+ mw.showMaximized();
+ return a.exec();
+}
diff --git a/examples/opengl/qopenglwidget/mainwindow.cpp b/examples/opengl/qopenglwidget/mainwindow.cpp
new file mode 100644
index 0000000000..f09acacaf0
--- /dev/null
+++ b/examples/opengl/qopenglwidget/mainwindow.cpp
@@ -0,0 +1,152 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** 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 Digia Plc 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 "mainwindow.h"
+
+#include <QApplication>
+#include <QMenuBar>
+#include <QGroupBox>
+#include <QSlider>
+#include <QLabel>
+#include <QCheckBox>
+#include <QSpinBox>
+
+#include "glwidget.h"
+
+MainWindow::MainWindow()
+ : m_nextX(1), m_nextY(1)
+{
+ GLWidget *glwidget = new GLWidget(this, true, qRgb(20, 20, 50));
+ QLabel *label = new QLabel(this);
+ m_timer = new QTimer(this);
+ QSlider *slider = new QSlider(this);
+ slider->setOrientation(Qt::Horizontal);
+
+ QLabel *updateLabel = new QLabel("Update interval");
+ QSpinBox *updateInterval = new QSpinBox(this);
+ updateInterval->setSuffix(" ms");
+ updateInterval->setValue(10);
+ updateInterval->setToolTip("Interval for the timer that calls update().\n"
+ "Note that on most systems the swap will block to wait for vsync\n"
+ "and therefore an interval < 16 ms will likely lead to a 60 FPS update rate.");
+ QGroupBox *updateGroupBox = new QGroupBox(this);
+ QCheckBox *transparent = new QCheckBox("Transparent background", this);
+ transparent->setToolTip("Toggles Qt::WA_AlwaysStackOnTop and transparent clear color for glClear().\n"
+ "Note how the button on top stacks incorrectly when enabling this.");
+ QHBoxLayout *updateLayout = new QHBoxLayout;
+ updateLayout->addWidget(updateLabel);
+ updateLayout->addWidget(updateInterval);
+ updateLayout->addWidget(transparent);
+ updateGroupBox->setLayout(updateLayout);
+
+ slider->setRange(0, 50);
+ slider->setSliderPosition(30);
+ m_timer->setInterval(10);
+ label->setText("A QOpenGLWidget");
+ label->setAlignment(Qt::AlignHCenter);
+
+ QGroupBox * groupBox = new QGroupBox(this);
+ setCentralWidget(groupBox);
+ groupBox->setTitle("QOpenGLWidget Example");
+
+ m_layout = new QGridLayout(groupBox);
+
+ m_layout->addWidget(glwidget,1,0,8,1);
+ m_layout->addWidget(label,9,0,1,1);
+ m_layout->addWidget(updateGroupBox, 10, 0, 1, 1);
+ m_layout->addWidget(slider, 11,0,1,1);
+
+ groupBox->setLayout(m_layout);
+
+ QMenu *fileMenu = new QMenu("&File");
+ QMenu *helpMenu = new QMenu("&Help");
+ QMenu *showMenu = new QMenu("&Show");
+ menuBar()->addMenu(fileMenu);
+ menuBar()->addMenu(showMenu);
+ menuBar()->addMenu(helpMenu);
+ QAction *exit = new QAction("E&xit", fileMenu);
+ QAction *aboutQt = new QAction("About Qt", helpMenu);
+ QAction *showLogo = new QAction("Show 3D Logo", showMenu);
+ QAction *showTexture = new QAction("Show 2D Texture", showMenu);
+ QAction *showBubbles = new QAction("Show bubbles", showMenu);
+ showBubbles->setCheckable(true);
+ showBubbles->setChecked(true);
+ fileMenu->addAction(exit);
+ helpMenu->addAction(aboutQt);
+ showMenu->addAction(showLogo);
+ showMenu->addAction(showTexture);
+ showMenu->addAction(showBubbles);
+
+ connect(exit, SIGNAL(triggered(bool)), this, SLOT(close()));
+ connect(aboutQt, SIGNAL(triggered(bool)), qApp, SLOT(aboutQt()));
+
+ connect(m_timer, SIGNAL(timeout()), glwidget, SLOT(update()));
+
+ connect(showLogo, SIGNAL(triggered(bool)), glwidget, SLOT(setLogo()));
+ connect(showTexture, SIGNAL(triggered(bool)), glwidget, SLOT(setTexture()));
+ connect(showBubbles, SIGNAL(triggered(bool)), glwidget, SLOT(showBubbles(bool)));
+ connect(slider, SIGNAL(valueChanged(int)), glwidget, SLOT(setScaling(int)));
+ connect(transparent, &QCheckBox::toggled, glwidget, &GLWidget::setTransparent);
+
+ connect(updateInterval, SIGNAL(valueChanged(int)), this, SLOT(updateIntervalChanged(int)));
+
+ m_timer->start();
+}
+
+void MainWindow::updateIntervalChanged(int value)
+{
+ m_timer->setInterval(value);
+ m_timer->start();
+}
+
+void MainWindow::addNew()
+{
+ if (m_nextY == 4)
+ return;
+ GLWidget *w = new GLWidget(this, false, qRgb(qrand() % 256, qrand() % 256, qrand() % 256));
+ connect(m_timer, SIGNAL(timeout()), w, SLOT(update()));
+ m_layout->addWidget(w, m_nextY, m_nextX, 1, 1);
+ if (m_nextX == 3) {
+ m_nextX = 1;
+ ++m_nextY;
+ } else {
+ ++m_nextX;
+ }
+}
diff --git a/examples/opengl/qopenglwidget/mainwindow.h b/examples/opengl/qopenglwidget/mainwindow.h
new file mode 100644
index 0000000000..9db3e8cbec
--- /dev/null
+++ b/examples/opengl/qopenglwidget/mainwindow.h
@@ -0,0 +1,66 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** 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 Digia Plc 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."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef MAINWINDOW_H
+#define MAINWINDOW_H
+
+#include <QMainWindow>
+#include <QTimer>
+#include <QGridLayout>
+
+class MainWindow : public QMainWindow
+{
+ Q_OBJECT
+
+public:
+ MainWindow();
+ void addNew();
+
+private slots:
+ void updateIntervalChanged(int value);
+
+private:
+ QTimer *m_timer;
+ QGridLayout *m_layout;
+ int m_nextX;
+ int m_nextY;
+};
+
+#endif
diff --git a/examples/opengl/qopenglwidget/qopenglwidget.pro b/examples/opengl/qopenglwidget/qopenglwidget.pro
new file mode 100644
index 0000000000..0165285c02
--- /dev/null
+++ b/examples/opengl/qopenglwidget/qopenglwidget.pro
@@ -0,0 +1,15 @@
+QT += widgets
+
+SOURCES += main.cpp \
+ glwidget.cpp \
+ mainwindow.cpp \
+ bubble.cpp
+
+HEADERS += glwidget.h \
+ mainwindow.h \
+ bubble.h
+
+RESOURCES += texture.qrc
+
+target.path = $$[QT_INSTALL_EXAMPLES]/opengl/qopenglwidget
+INSTALLS += target
diff --git a/examples/opengl/qopenglwidget/qt.png b/examples/opengl/qopenglwidget/qt.png
new file mode 100644
index 0000000000..79e383cf50
--- /dev/null
+++ b/examples/opengl/qopenglwidget/qt.png
Binary files differ
diff --git a/examples/opengl/qopenglwidget/texture.qrc b/examples/opengl/qopenglwidget/texture.qrc
new file mode 100644
index 0000000000..ff1d0e535f
--- /dev/null
+++ b/examples/opengl/qopenglwidget/texture.qrc
@@ -0,0 +1,5 @@
+<!DOCTYPE RCC><RCC version="1.0">
+<qresource>
+ <file>qt.png</file>
+</qresource>
+</RCC>
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-01 07:38:39 +0000