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// Copyright (C) 2018 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include <QOpenGLFunctions>
#include <QtOpenGL/QOpenGLWindow>
#include <QSurface>
#include <QWidget>
#include <QWindow>
namespace src_gui_opengl_qopenglfunctions {
//! [0]
class MyGLWindow : public QWindow, protected QOpenGLFunctions
{
Q_OBJECT
public:
explicit MyGLWindow(QScreen *screen = nullptr);
protected:
void initializeGL();
void paintGL();
QOpenGLContext *m_context;
};
MyGLWindow::MyGLWindow(QScreen *screen)
: QWindow(screen)
{
setSurfaceType(OpenGLSurface);
create();
// Create an OpenGL context
m_context = new QOpenGLContext;
m_context->create();
// Setup scene and render it
initializeGL();
paintGL();
};
void MyGLWindow::initializeGL()
{
m_context->makeCurrent(this);
initializeOpenGLFunctions();
}
//! [0]
int textureId = 0;
//! [1]
void MyGLWindow::paintGL()
{
m_context->makeCurrent(this);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, textureId);
// ...
m_context->swapBuffers(this);
m_context->doneCurrent();
}
//! [1]
void wrapper0() {
//! [2]
QOpenGLFunctions glFuncs(QOpenGLContext::currentContext());
glFuncs.glActiveTexture(GL_TEXTURE1);
//! [2]
} // wrapper0
void wrapper1() {
//! [3]
QOpenGLFunctions *glFuncs = QOpenGLContext::currentContext()->functions();
glFuncs->glActiveTexture(GL_TEXTURE1);
//! [3]
//! [4]
QOpenGLFunctions funcs(QOpenGLContext::currentContext());
bool npot = funcs.hasOpenGLFeature(QOpenGLFunctions::NPOTTextures);
//! [4]
Q_UNUSED(npot);
} // wrapper1
} // src_gui_opengl_qopenglfunctions
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