diff options
Diffstat (limited to 'examples/opengl')
-rw-r--r-- | examples/opengl/opengl.pro | 1 | ||||
-rw-r--r-- | examples/opengl/openglwindow/main.cpp | 177 | ||||
-rw-r--r-- | examples/opengl/openglwindow/openglwindow.cpp | 161 | ||||
-rw-r--r-- | examples/opengl/openglwindow/openglwindow.h | 91 | ||||
-rw-r--r-- | examples/opengl/openglwindow/openglwindow.pri | 4 | ||||
-rw-r--r-- | examples/opengl/openglwindow/openglwindow.pro | 7 | ||||
-rw-r--r-- | examples/opengl/paintedwindow/paintedwindow.pro | 2 |
7 files changed, 443 insertions, 0 deletions
diff --git a/examples/opengl/opengl.pro b/examples/opengl/opengl.pro index 89b3e1d86e..74c39a1e27 100644 --- a/examples/opengl/opengl.pro +++ b/examples/opengl/opengl.pro @@ -2,6 +2,7 @@ TEMPLATE = subdirs SUBDIRS = hellowindow \ paintedwindow \ + openglwindow \ qopenglwindow qtHaveModule(widgets) { diff --git a/examples/opengl/openglwindow/main.cpp b/examples/opengl/openglwindow/main.cpp new file mode 100644 index 0000000000..03a6ece06f --- /dev/null +++ b/examples/opengl/openglwindow/main.cpp @@ -0,0 +1,177 @@ +/**************************************************************************** +** +** Copyright (C) 2016 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the documentation 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 "openglwindow.h" + +#include <QGuiApplication> +#include <QMatrix4x4> +#include <QOpenGLShaderProgram> +#include <QScreen> +#include <QtMath> + + +//! [1] +class TriangleWindow : public OpenGLWindow +{ +public: + using OpenGLWindow::OpenGLWindow; + + void initialize() override; + void render() override; + +private: + GLint m_posAttr = 0; + GLint m_colAttr = 0; + GLint m_matrixUniform = 0; + + QOpenGLShaderProgram *m_program = nullptr; + int m_frame = 0; +}; +//! [1] + +//! [2] +int main(int argc, char **argv) +{ + QGuiApplication app(argc, argv); + + QSurfaceFormat format; + format.setSamples(16); + + TriangleWindow window; + window.setFormat(format); + window.resize(640, 480); + window.show(); + + window.setAnimating(true); + + return app.exec(); +} +//! [2] + + +//! [3] +static const char *vertexShaderSource = + "attribute highp vec4 posAttr;\n" + "attribute lowp vec4 colAttr;\n" + "varying lowp vec4 col;\n" + "uniform highp mat4 matrix;\n" + "void main() {\n" + " col = colAttr;\n" + " gl_Position = matrix * posAttr;\n" + "}\n"; + +static const char *fragmentShaderSource = + "varying lowp vec4 col;\n" + "void main() {\n" + " gl_FragColor = col;\n" + "}\n"; +//! [3] + +//! [4] +void TriangleWindow::initialize() +{ + m_program = new QOpenGLShaderProgram(this); + m_program->addShaderFromSourceCode(QOpenGLShader::Vertex, vertexShaderSource); + m_program->addShaderFromSourceCode(QOpenGLShader::Fragment, fragmentShaderSource); + m_program->link(); + m_posAttr = m_program->attributeLocation("posAttr"); + Q_ASSERT(m_posAttr != -1); + m_colAttr = m_program->attributeLocation("colAttr"); + Q_ASSERT(m_colAttr != -1); + m_matrixUniform = m_program->uniformLocation("matrix"); + Q_ASSERT(m_matrixUniform != -1); +} +//! [4] + +//! [5] +void TriangleWindow::render() +{ + const qreal retinaScale = devicePixelRatio(); + glViewport(0, 0, width() * retinaScale, height() * retinaScale); + + glClear(GL_COLOR_BUFFER_BIT); + + m_program->bind(); + + QMatrix4x4 matrix; + matrix.perspective(60.0f, 4.0f / 3.0f, 0.1f, 100.0f); + matrix.translate(0, 0, -2); + matrix.rotate(100.0f * m_frame / screen()->refreshRate(), 0, 1, 0); + + m_program->setUniformValue(m_matrixUniform, matrix); + + static const GLfloat vertices[] = { + 0.0f, 0.707f, + -0.5f, -0.5f, + 0.5f, -0.5f + }; + + static const GLfloat colors[] = { + 1.0f, 0.0f, 0.0f, + 0.0f, 1.0f, 0.0f, + 0.0f, 0.0f, 1.0f + }; + + glVertexAttribPointer(m_posAttr, 2, GL_FLOAT, GL_FALSE, 0, vertices); + glVertexAttribPointer(m_colAttr, 3, GL_FLOAT, GL_FALSE, 0, colors); + + glEnableVertexAttribArray(m_posAttr); + glEnableVertexAttribArray(m_colAttr); + + glDrawArrays(GL_TRIANGLES, 0, 3); + + glDisableVertexAttribArray(m_colAttr); + glDisableVertexAttribArray(m_posAttr); + + m_program->release(); + + ++m_frame; +} +//! [5] diff --git a/examples/opengl/openglwindow/openglwindow.cpp b/examples/opengl/openglwindow/openglwindow.cpp new file mode 100644 index 0000000000..bac887dca0 --- /dev/null +++ b/examples/opengl/openglwindow/openglwindow.cpp @@ -0,0 +1,161 @@ +/**************************************************************************** +** +** Copyright (C) 2016 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the documentation 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 "openglwindow.h" + +#include <QOpenGLContext> +#include <QOpenGLPaintDevice> +#include <QPainter> + +//! [1] +OpenGLWindow::OpenGLWindow(QWindow *parent) + : QWindow(parent) +{ + setSurfaceType(QWindow::OpenGLSurface); +} +//! [1] + +OpenGLWindow::~OpenGLWindow() +{ + delete m_device; +} +//! [2] +void OpenGLWindow::render(QPainter *painter) +{ + Q_UNUSED(painter); +} + +void OpenGLWindow::initialize() +{ +} + +void OpenGLWindow::render() +{ + if (!m_device) + m_device = new QOpenGLPaintDevice; + + glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT); + + m_device->setSize(size() * devicePixelRatio()); + m_device->setDevicePixelRatio(devicePixelRatio()); + + QPainter painter(m_device); + render(&painter); +} +//! [2] + +//! [3] +void OpenGLWindow::renderLater() +{ + requestUpdate(); +} + +bool OpenGLWindow::event(QEvent *event) +{ + switch (event->type()) { + case QEvent::UpdateRequest: + renderNow(); + return true; + default: + return QWindow::event(event); + } +} + +void OpenGLWindow::exposeEvent(QExposeEvent *event) +{ + Q_UNUSED(event); + + if (isExposed()) + renderNow(); +} +//! [3] + +//! [4] +void OpenGLWindow::renderNow() +{ + if (!isExposed()) + return; + + bool needsInitialize = false; + + if (!m_context) { + m_context = new QOpenGLContext(this); + m_context->setFormat(requestedFormat()); + m_context->create(); + + needsInitialize = true; + } + + m_context->makeCurrent(this); + + if (needsInitialize) { + initializeOpenGLFunctions(); + initialize(); + } + + render(); + + m_context->swapBuffers(this); + + if (m_animating) + renderLater(); +} +//! [4] + +//! [5] +void OpenGLWindow::setAnimating(bool animating) +{ + m_animating = animating; + + if (animating) + renderLater(); +} +//! [5] + diff --git a/examples/opengl/openglwindow/openglwindow.h b/examples/opengl/openglwindow/openglwindow.h new file mode 100644 index 0000000000..8db943ddde --- /dev/null +++ b/examples/opengl/openglwindow/openglwindow.h @@ -0,0 +1,91 @@ +/**************************************************************************** +** +** Copyright (C) 2016 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the documentation 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 <QWindow> +#include <QOpenGLFunctions> + +QT_BEGIN_NAMESPACE +class QPainter; +class QOpenGLContext; +class QOpenGLPaintDevice; +QT_END_NAMESPACE + +//! [1] +class OpenGLWindow : public QWindow, protected QOpenGLFunctions +{ + Q_OBJECT +public: + explicit OpenGLWindow(QWindow *parent = nullptr); + ~OpenGLWindow(); + + virtual void render(QPainter *painter); + virtual void render(); + + virtual void initialize(); + + void setAnimating(bool animating); + +public slots: + void renderLater(); + void renderNow(); + +protected: + bool event(QEvent *event) override; + + void exposeEvent(QExposeEvent *event) override; + +private: + bool m_animating = false; + + QOpenGLContext *m_context = nullptr; + QOpenGLPaintDevice *m_device = nullptr; +}; +//! [1] + diff --git a/examples/opengl/openglwindow/openglwindow.pri b/examples/opengl/openglwindow/openglwindow.pri new file mode 100644 index 0000000000..30320df3b7 --- /dev/null +++ b/examples/opengl/openglwindow/openglwindow.pri @@ -0,0 +1,4 @@ +QT += opengl +INCLUDEPATH += $$PWD +SOURCES += $$PWD/openglwindow.cpp +HEADERS += $$PWD/openglwindow.h diff --git a/examples/opengl/openglwindow/openglwindow.pro b/examples/opengl/openglwindow/openglwindow.pro new file mode 100644 index 0000000000..8b1ae71c14 --- /dev/null +++ b/examples/opengl/openglwindow/openglwindow.pro @@ -0,0 +1,7 @@ +include(openglwindow.pri) + +SOURCES += \ + main.cpp + +target.path = $$[QT_INSTALL_EXAMPLES]/opengl/openglwindow +INSTALLS += target diff --git a/examples/opengl/paintedwindow/paintedwindow.pro b/examples/opengl/paintedwindow/paintedwindow.pro index 1846aa4049..569eebe674 100644 --- a/examples/opengl/paintedwindow/paintedwindow.pro +++ b/examples/opengl/paintedwindow/paintedwindow.pro @@ -1,3 +1,5 @@ +QT += opengl + HEADERS += paintedwindow.h SOURCES += paintedwindow.cpp main.cpp |