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Diffstat (limited to 'examples/opengl/hellowindow/hellowindow.cpp')
-rw-r--r-- | examples/opengl/hellowindow/hellowindow.cpp | 352 |
1 files changed, 0 insertions, 352 deletions
diff --git a/examples/opengl/hellowindow/hellowindow.cpp b/examples/opengl/hellowindow/hellowindow.cpp deleted file mode 100644 index bde763dd70..0000000000 --- a/examples/opengl/hellowindow/hellowindow.cpp +++ /dev/null @@ -1,352 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2016 The Qt Company Ltd. -** Contact: https://www.qt.io/licensing/ -** -** This file is part of the examples of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:BSD$ -** Commercial License Usage -** Licensees holding valid commercial Qt licenses may use this file in -** accordance with the commercial license agreement provided with the -** Software or, alternatively, in accordance with the terms contained in -** a written agreement between you and The Qt Company. For licensing terms -** and conditions see https://www.qt.io/terms-conditions. For further -** information use the contact form at https://www.qt.io/contact-us. -** -** BSD License Usage -** Alternatively, 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 The Qt Company Ltd 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 "hellowindow.h" - -#include <QOpenGLContext> -#include <QOpenGLFunctions> -#include <QRandomGenerator> -#include <qmath.h> -#include <QElapsedTimer> - -Renderer::Renderer(const QSurfaceFormat &format, Renderer *share, QScreen *screen) - : m_initialized(false) - , m_format(format) -{ - m_context = new QOpenGLContext(this); - if (screen) - m_context->setScreen(screen); - m_context->setFormat(format); - if (share) - m_context->setShareContext(share->m_context); - m_context->create(); - - m_backgroundColor = QColor::fromRgbF(0.1f, 0.1f, 0.2f, 1.0f); - m_backgroundColor.setRed(QRandomGenerator::global()->bounded(64)); - m_backgroundColor.setGreen(QRandomGenerator::global()->bounded(128)); - m_backgroundColor.setBlue(QRandomGenerator::global()->bounded(256)); -} - -HelloWindow::HelloWindow(const QSharedPointer<Renderer> &renderer, QScreen *screen) - : m_colorIndex(0), m_renderer(renderer) -{ - setSurfaceType(QWindow::OpenGLSurface); - setFlags(Qt::Window | Qt::WindowSystemMenuHint | Qt::WindowTitleHint | Qt::WindowMinMaxButtonsHint | Qt::WindowCloseButtonHint); - - setGeometry(QRect(10, 10, 640, 480)); - - setFormat(renderer->format()); - if (screen) - setScreen(screen); - - create(); - - updateColor(); - - connect(renderer.data(), &Renderer::requestUpdate, this, &QWindow::requestUpdate); -} - -void HelloWindow::exposeEvent(QExposeEvent *) -{ - if (isExposed()) - render(); -} - -bool HelloWindow::event(QEvent *ev) -{ - if (ev->type() == QEvent::UpdateRequest && isExposed()) - render(); - return QWindow::event(ev); -} - -void HelloWindow::render() -{ - static QElapsedTimer timer; - if (!timer.isValid()) - timer.start(); - qreal a = (qreal)(((timer.elapsed() * 3) % 36000) / 100.0); - auto call = [this, r = m_renderer.data(), a, c = color()]() { r->render(this, a, c); }; - QMetaObject::invokeMethod(m_renderer.data(), call); -} - -void HelloWindow::mousePressEvent(QMouseEvent *) -{ - updateColor(); -} - -QColor HelloWindow::color() const -{ - return m_color; -} - -void HelloWindow::updateColor() -{ - QColor colors[] = - { - QColor(100, 255, 0), - QColor(0, 100, 255) - }; - - m_color = colors[m_colorIndex]; - m_colorIndex = 1 - m_colorIndex; -} - -void Renderer::render(HelloWindow *surface, qreal angle, const QColor &color) -{ - if (!m_context->makeCurrent(surface)) - return; - - QSize viewSize = surface->size(); - - if (!m_initialized) { - initialize(); - m_initialized = true; - } - - QOpenGLFunctions *f = m_context->functions(); - f->glViewport(0, 0, viewSize.width() * surface->devicePixelRatio(), viewSize.height() * surface->devicePixelRatio()); - f->glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); - - f->glClearColor(m_backgroundColor.redF(), m_backgroundColor.greenF(), m_backgroundColor.blueF(), m_backgroundColor.alphaF()); - f->glFrontFace(GL_CW); - f->glCullFace(GL_FRONT); - f->glEnable(GL_CULL_FACE); - f->glEnable(GL_DEPTH_TEST); - - m_program->bind(); - m_vbo.bind(); - - m_program->enableAttributeArray(vertexAttr); - m_program->enableAttributeArray(normalAttr); - m_program->setAttributeBuffer(vertexAttr, GL_FLOAT, 0, 3); - const int verticesSize = vertices.count() * 3 * sizeof(GLfloat); - m_program->setAttributeBuffer(normalAttr, GL_FLOAT, verticesSize, 3); - - QMatrix4x4 modelview; - modelview.rotate(angle, 0.0f, 1.0f, 0.0f); - modelview.rotate(angle, 1.0f, 0.0f, 0.0f); - modelview.rotate(angle, 0.0f, 0.0f, 1.0f); - modelview.translate(0.0f, -0.2f, 0.0f); - - m_program->setUniformValue(matrixUniform, modelview); - m_program->setUniformValue(colorUniform, color); - - m_context->functions()->glDrawArrays(GL_TRIANGLES, 0, vertices.size()); - - m_context->swapBuffers(surface); - - emit requestUpdate(); -} - -Q_GLOBAL_STATIC(QMutex, initMutex) - -void Renderer::initialize() -{ - // Threaded shader compilation can confuse some drivers. Avoid it. - QMutexLocker lock(initMutex()); - - QOpenGLShader *vshader = new QOpenGLShader(QOpenGLShader::Vertex, this); - vshader->compileSourceCode( - "attribute highp vec4 vertex;" - "attribute mediump vec3 normal;" - "uniform mediump mat4 matrix;" - "uniform lowp vec4 sourceColor;" - "varying mediump vec4 color;" - "void main(void)" - "{" - " vec3 toLight = normalize(vec3(0.0, 0.3, 1.0));" - " float angle = max(dot(normal, toLight), 0.0);" - " vec3 col = sourceColor.rgb;" - " color = vec4(col * 0.2 + col * 0.8 * angle, 1.0);" - " color = clamp(color, 0.0, 1.0);" - " gl_Position = matrix * vertex;" - "}"); - - QOpenGLShader *fshader = new QOpenGLShader(QOpenGLShader::Fragment, this); - fshader->compileSourceCode( - "varying mediump vec4 color;" - "void main(void)" - "{" - " gl_FragColor = color;" - "}"); - - m_program = new QOpenGLShaderProgram(this); - m_program->addShader(vshader); - m_program->addShader(fshader); - m_program->link(); - m_program->bind(); - - vertexAttr = m_program->attributeLocation("vertex"); - normalAttr = m_program->attributeLocation("normal"); - matrixUniform = m_program->uniformLocation("matrix"); - colorUniform = m_program->uniformLocation("sourceColor"); - - createGeometry(); - - m_vbo.create(); - m_vbo.bind(); - const int verticesSize = vertices.count() * 3 * sizeof(GLfloat); - m_vbo.allocate(verticesSize * 2); - m_vbo.write(0, vertices.constData(), verticesSize); - m_vbo.write(verticesSize, normals.constData(), verticesSize); -} - -void Renderer::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 int NumSectors = 100; - const qreal sectorAngle = 2 * qreal(M_PI) / NumSectors; - for (int i = 0; i < NumSectors; ++i) { - qreal angle = i * sectorAngle; - qreal x5 = 0.30 * qSin(angle); - qreal y5 = 0.30 * qCos(angle); - qreal x6 = 0.20 * qSin(angle); - qreal y6 = 0.20 * qCos(angle); - - angle += sectorAngle; - qreal x7 = 0.20 * qSin(angle); - qreal y7 = 0.20 * qCos(angle); - qreal x8 = 0.30 * qSin(angle); - qreal y8 = 0.30 * qCos(angle); - - 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 Renderer::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 Renderer::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; -} |