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-rw-r--r--examples/opengl/qopenglwindow/background_renderer.cpp12
-rw-r--r--examples/opengl/qopenglwindow/background_renderer.h16
-rw-r--r--examples/opengl/qopenglwindow/main.cpp170
3 files changed, 116 insertions, 82 deletions
diff --git a/examples/opengl/qopenglwindow/background_renderer.cpp b/examples/opengl/qopenglwindow/background_renderer.cpp
index 6cec6666b6..4c377e1437 100644
--- a/examples/opengl/qopenglwindow/background_renderer.cpp
+++ b/examples/opengl/qopenglwindow/background_renderer.cpp
@@ -40,13 +40,13 @@
#include "background_renderer.h"
-#include <QtCore/qmath.h>
-#include <QtCore/QFileInfo>
-#include <QtCore/QTime>
+#include <qmath.h>
+#include <QFileInfo>
+#include <QTime>
-#include <QtGui/QOpenGLShaderProgram>
-#include <QtGui/QOpenGLContext>
-#include <QtGui/QOpenGLFunctions>
+#include <QOpenGLShaderProgram>
+#include <QOpenGLContext>
+#include <QOpenGLFunctions>
#include <math.h>
diff --git a/examples/opengl/qopenglwindow/background_renderer.h b/examples/opengl/qopenglwindow/background_renderer.h
index 4f968325d5..3759de478c 100644
--- a/examples/opengl/qopenglwindow/background_renderer.h
+++ b/examples/opengl/qopenglwindow/background_renderer.h
@@ -41,14 +41,14 @@
#ifndef FRAGMENT_TOY_H
#define FRAGMENT_TOY_H
-#include <QtCore/QObject>
-#include <QtCore/QFile>
-#include <QtCore/QDateTime>
-#include <QtCore/QFileSystemWatcher>
-#include <QtGui/QOpenGLVertexArrayObject>
-#include <QtGui/QOpenGLBuffer>
-#include <QtGui/QOpenGLShaderProgram>
-#include <QtGui/QOpenGLFunctions>
+#include <QObject>
+#include <QFile>
+#include <QDateTime>
+#include <QFileSystemWatcher>
+#include <QOpenGLVertexArrayObject>
+#include <QOpenGLBuffer>
+#include <QOpenGLShaderProgram>
+#include <QOpenGLFunctions>
class FragmentToy : public QObject, protected QOpenGLFunctions
{
diff --git a/examples/opengl/qopenglwindow/main.cpp b/examples/opengl/qopenglwindow/main.cpp
index 19ac9e8a15..a67bcbb2e3 100644
--- a/examples/opengl/qopenglwindow/main.cpp
+++ b/examples/opengl/qopenglwindow/main.cpp
@@ -38,12 +38,13 @@
**
****************************************************************************/
-#include <QtGui/QOpenGLWindow>
-#include <QtGui/QScreen>
-#include <QtGui/QPainter>
-#include <QtGui/QGuiApplication>
-#include <QtGui/QMatrix4x4>
-#include <QtGui/QStaticText>
+#include <QOpenGLWindow>
+#include <QScreen>
+#include <QPainter>
+#include <QGuiApplication>
+#include <QMatrix4x4>
+#include <QStaticText>
+#include <QKeyEvent>
#include "background_renderer.h"
@@ -65,71 +66,16 @@ class OpenGLWindow : public QOpenGLWindow
Q_OBJECT
public:
- // 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()
- : QOpenGLWindow(QOpenGLWindow::NoPartialUpdate)
- , m_fragment_toy("background.frag")
- , m_text_layout("The triangle and this text is rendered with QPainter")
- {
- m_view.lookAt(QVector3D(3,1,1),
- QVector3D(0,0,0),
- QVector3D(0,1,0));
- connect(this, SIGNAL(frameSwapped()), this, SLOT(update()));
-
- QLinearGradient gradient(QPointF(-1,-1), QPointF(1,1));
- gradient.setColorAt(0, Qt::red);
- gradient.setColorAt(1, Qt::green);
-
- m_brush = QBrush(gradient);
- }
+ OpenGLWindow();
protected:
- void paintGL() Q_DECL_OVERRIDE
- {
- 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(), m_brush);
-
- QTransform text_transform = (m_window_painter_matrix * m_view * m_model_text).toTransform();
- p.setTransform(text_transform, false);
- p.setPen(QPen(Qt::white));
- 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 resizeGL(int w, int h) Q_DECL_OVERRIDE
- {
- 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 paintGL() Q_DECL_OVERRIDE;
+ void resizeGL(int w, int h) Q_DECL_OVERRIDE;
+ void keyPressEvent(QKeyEvent *e) Q_DECL_OVERRIDE;
private:
+ void setAnimating(bool enabled);
+
QMatrix4x4 m_window_normalised_matrix;
QMatrix4x4 m_window_painter_matrix;
QMatrix4x4 m_projection;
@@ -140,9 +86,97 @@ private:
FragmentToy m_fragment_toy;
QStaticText m_text_layout;
+ bool m_animate;
};
-int main (int argc, char **argv)
+// 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)
+{
+ m_view.lookAt(QVector3D(3,1,1),
+ QVector3D(0,0,0),
+ QVector3D(0,1,0));
+
+ QLinearGradient gradient(QPointF(-1,-1), QPointF(1,1));
+ gradient.setColorAt(0, Qt::red);
+ gradient.setColorAt(1, Qt::green);
+
+ m_brush = QBrush(gradient);
+
+ 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(), m_brush);
+
+ QTransform text_transform = (m_window_painter_matrix * m_view * m_model_text).toTransform();
+ p.setTransform(text_transform, false);
+ p.setPen(QPen(Qt::white));
+ 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, SIGNAL(frameSwapped()), this, SLOT(update()));
+ update();
+ } else {
+ disconnect(this, SIGNAL(frameSwapped()), this, SLOT(update()));
+ }
+}
+
+int main(int argc, char **argv)
{
QGuiApplication app(argc, argv);
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-03 16:36:13 +0000