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Diffstat (limited to 'examples/opengl/qopenglwindow/main.cpp')
| -rw-r--r-- | examples/opengl/qopenglwindow/main.cpp | 201 |
1 files changed, 0 insertions, 201 deletions
diff --git a/examples/opengl/qopenglwindow/main.cpp b/examples/opengl/qopenglwindow/main.cpp deleted file mode 100644 index 7ce4dd0977..0000000000 --- a/examples/opengl/qopenglwindow/main.cpp +++ /dev/null @@ -1,201 +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 <QOpenGLWindow> -#include <QScreen> -#include <QPainter> -#include <QPainterPath> -#include <QGuiApplication> -#include <QMatrix4x4> -#include <QStaticText> -#include <QKeyEvent> - -#include "background_renderer.h" - -static QPainterPath painterPathForTriangle() -{ - static const QPointF bottomLeft(-1.0, -1.0); - static const QPointF top(0.0, 1.0); - static const QPointF bottomRight(1.0, -1.0); - - QPainterPath path(bottomLeft); - path.lineTo(top); - path.lineTo(bottomRight); - path.closeSubpath(); - return path; -} - -class OpenGLWindow : public QOpenGLWindow -{ - Q_OBJECT - -public: - OpenGLWindow(); - -protected: - void paintGL() override; - void resizeGL(int w, int h) override; - void keyPressEvent(QKeyEvent *e) override; - -private: - void setAnimating(bool enabled); - - QMatrix4x4 m_window_normalised_matrix; - QMatrix4x4 m_window_painter_matrix; - QMatrix4x4 m_projection; - QMatrix4x4 m_view; - QMatrix4x4 m_model_triangle; - QMatrix4x4 m_model_text; - - FragmentToy m_fragment_toy; - QStaticText m_text_layout; - bool m_animate; -}; - -// Use NoPartialUpdate. This means that all the rendering goes directly to -// the window surface, no additional framebuffer object stands in the -// middle. This is fine since we will clear the entire framebuffer on each -// paint. Under the hood this means that the behavior is equivalent to the -// manual makeCurrent - perform OpenGL calls - swapBuffers loop that is -// typical in pure QWindow-based applications. -OpenGLWindow::OpenGLWindow() - : QOpenGLWindow(QOpenGLWindow::NoPartialUpdate) - , m_fragment_toy("./background.frag") - , m_text_layout("The triangle and this text is rendered with QPainter") - , m_animate(true) -{ - setGeometry(300, 300, 500, 500); - - m_view.lookAt(QVector3D(3,1,1), - QVector3D(0,0,0), - QVector3D(0,1,0)); - - setAnimating(m_animate); -} - -void OpenGLWindow::paintGL() -{ - m_fragment_toy.draw(size()); - - QPainter p(this); - p.setWorldTransform(m_window_normalised_matrix.toTransform()); - - QMatrix4x4 mvp = m_projection * m_view * m_model_triangle; - p.setTransform(mvp.toTransform(), true); - - p.fillPath(painterPathForTriangle(), QBrush(QGradient(QGradient::NightFade))); - - QTransform text_transform = (m_window_painter_matrix * m_view * m_model_text).toTransform(); - p.setTransform(text_transform, false); - p.setPen(QPen(Qt::black)); - m_text_layout.prepare(text_transform); - qreal x = - (m_text_layout.size().width() / 2); - qreal y = 0; - p.drawStaticText(x, y, m_text_layout); - - m_model_triangle.rotate(-1, 0, 1, 0); - m_model_text.rotate(1, 0, 1, 0); -} - -void OpenGLWindow::resizeGL(int w, int h) -{ - m_window_normalised_matrix.setToIdentity(); - m_window_normalised_matrix.translate(w / 2.0, h / 2.0); - m_window_normalised_matrix.scale(w / 2.0, -h / 2.0); - - m_window_painter_matrix.setToIdentity(); - m_window_painter_matrix.translate(w / 2.0, h / 2.0); - - m_text_layout.setTextWidth(std::max(w * 0.2, 80.0)); - - m_projection.setToIdentity(); - m_projection.perspective(45.f, qreal(w) / qreal(h), 0.1f, 100.f); -} - -void OpenGLWindow::keyPressEvent(QKeyEvent *e) -{ - if (e->key() == Qt::Key_P) { // pause - m_animate = !m_animate; - setAnimating(m_animate); - } -} - -void OpenGLWindow::setAnimating(bool enabled) -{ - if (enabled) { - // Animate continuously, throttled by the blocking swapBuffers() call the - // QOpenGLWindow internally executes after each paint. Once that is done - // (frameSwapped signal is emitted), we schedule a new update. This - // obviously assumes that the swap interval (see - // QSurfaceFormat::setSwapInterval()) is non-zero. - connect(this, &QOpenGLWindow::frameSwapped, - this, QOverload<>::of(&QPaintDeviceWindow::update)); - update(); - } else { - disconnect(this, &QOpenGLWindow::frameSwapped, - this, QOverload<>::of(&QPaintDeviceWindow::update)); - } -} - -int main(int argc, char **argv) -{ - QGuiApplication app(argc, argv); - - OpenGLWindow window; - QSurfaceFormat fmt; - fmt.setDepthBufferSize(24); - fmt.setStencilBufferSize(8); - window.setFormat(fmt); - window.show(); - - return app.exec(); -} - -#include "main.moc" |