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authorAlexandru Croitor <alexandru.croitor@qt.io>2020-01-29 16:57:12 +0100
committerAlexandru Croitor <alexandru.croitor@qt.io>2020-01-29 16:57:27 +0100
commita1dbdcbd6e818118f5fc28cdd39e47a02380adbd (patch)
tree0d813d9d72baeb1b5f7be048e775896c73f134f5 /examples/opengl/openglwindow
parent67ea445f09db9feea4e863faa12c45fb007f53a4 (diff)
parent4cbadf699838406d14366ce61deec03cf45113f7 (diff)
Merge remote-tracking branch 'origin/dev' into wip/cmake
Conflicts: src/corelib/Qt5CoreConfigExtras.cmake.in src/corelib/Qt5CoreMacros.cmake src/dbus/Qt5DBusConfigExtras.cmake.in src/widgets/Qt5WidgetsConfigExtras.cmake.in Change-Id: Ib782f3b177c38b2cce83beebe15be9c0baa578f7
Diffstat (limited to 'examples/opengl/openglwindow')
-rw-r--r--examples/opengl/openglwindow/main.cpp177
-rw-r--r--examples/opengl/openglwindow/openglwindow.cpp161
-rw-r--r--examples/opengl/openglwindow/openglwindow.h91
-rw-r--r--examples/opengl/openglwindow/openglwindow.pri4
-rw-r--r--examples/opengl/openglwindow/openglwindow.pro7
5 files changed, 440 insertions, 0 deletions
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