FCL/sf/mw/qt: comparison util/examples/opengl/hellogl

equal deleted inserted replaced

-:41300fa6a67c
+:f7bc934e204c
+/****************************************************************************
+**
+** Copyright (C) 2010 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.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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 Technology Preview License Agreement accompanying
+** this package.
+**
+** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#include "glwidget.h"
+#include <QPainter>
+#include <QPaintEngine>
+#include <math.h>
+#include "bubble.h"
+const int bubbleNum = 8;
+GLWidget::GLWidget(QWidget *parent)
+: QGLWidget(parent)
+{
+qtLogo = true;
+frames = 0;
+setAttribute(Qt::WA_PaintOnScreen);
+setAttribute(Qt::WA_NoSystemBackground);
+setAutoBufferSwap(false);
+m_showBubbles = true;
+#ifndef Q_WS_QWS
+setMinimumSize(300, 250);
+#endif
+}
+GLWidget::~GLWidget()
+{
+}
+void GLWidget::setScaling(int scale) {
+if (scale > 50)
+m_fScale = 1 + qreal(scale -50) / 50 * 0.5;
+else if (scale < 50)
+m_fScale =  1- (qreal(50 - scale) / 50 * 1/2);
+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 ()
+{
+glClearColor(0.1f, 0.1f, 0.2f, 1.0f);
+glGenTextures(1, &m_uiTexture);
+m_uiTexture = bindTexture(QImage(":/qt.png"));
+QGLShader *vshader1 = new QGLShader(QGLShader::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);
+QGLShader *fshader1 = new QGLShader(QGLShader::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");
+QGLShader *vshader2 = new QGLShader(QGLShader::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);
+QGLShader *fshader2 = new QGLShader(QGLShader::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");
+glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
+glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
+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(0.1f, 0.1f, 0.2f, 1.0f);
+glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
+glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
+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);
+}
+QString framesPerSecond;
+framesPerSecond.setNum(frames /(time.elapsed() / 1000.0), 'f', 2);
+painter.setPen(Qt::white);
+painter.drawText(20, 40, framesPerSecond + " fps");
+painter.end();
+swapBuffers();
+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;
+}