qt-everywhere-src-5.14.1/qtbase/src/plugins/platforms/qnx/qqnxglcontext.cpp

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#include "qqnxglcontext.h"
#include "qqnxintegration.h"
#include "qqnxscreen.h"
#include "qqnxeglwindow.h"

#include "private/qeglconvenience_p.h"

#include <QtCore/QDebug>
#include <QtGui/QOpenGLContext>
#include <QtGui/QScreen>

#include <dlfcn.h>

#if defined(QQNXGLCONTEXT_DEBUG)
#define qGLContextDebug qDebug
#else
#define qGLContextDebug QT_NO_QDEBUG_MACRO
#endif

QT_BEGIN_NAMESPACE

EGLDisplay QQnxGLContext::ms_eglDisplay = EGL_NO_DISPLAY;

static QEGLPlatformContext::Flags makeFlags()
{
    QEGLPlatformContext::Flags result = 0;

    if (!QQnxIntegration::instance()->options().testFlag(QQnxIntegration::SurfacelessEGLContext))
        result |= QEGLPlatformContext::NoSurfaceless;

    return result;
}

QQnxGLContext::QQnxGLContext(const QSurfaceFormat &format, QPlatformOpenGLContext *share)
    : QEGLPlatformContext(format, share, ms_eglDisplay, 0, QVariant(), makeFlags())
{
}

QQnxGLContext::~QQnxGLContext()
{
}

void QQnxGLContext::initializeContext()
{
    qGLContextDebug();

    // Initialize connection to EGL
    ms_eglDisplay = eglGetDisplay(EGL_DEFAULT_DISPLAY);
    if (Q_UNLIKELY(ms_eglDisplay == EGL_NO_DISPLAY))
        qFatal("QQnxGLContext: failed to obtain EGL display: %x", eglGetError());

    EGLBoolean eglResult = eglInitialize(ms_eglDisplay, 0, 0);
    if (Q_UNLIKELY(eglResult != EGL_TRUE))
        qFatal("QQnxGLContext: failed to initialize EGL display, err=%d", eglGetError());
}

void QQnxGLContext::shutdownContext()
{
    qGLContextDebug();

    // Close connection to EGL
    eglTerminate(ms_eglDisplay);
}

EGLSurface QQnxGLContext::eglSurfaceForPlatformSurface(QPlatformSurface *surface)
{
    QQnxEglWindow *window = static_cast<QQnxEglWindow *>(surface);
    window->ensureInitialized(this);
    return window->surface();
}

bool QQnxGLContext::makeCurrent(QPlatformSurface *surface)
{
    qGLContextDebug();
    return QEGLPlatformContext::makeCurrent(surface);
}

void QQnxGLContext::swapBuffers(QPlatformSurface *surface)
{
    qGLContextDebug();

    QEGLPlatformContext::swapBuffers(surface);

    QQnxEglWindow *platformWindow = static_cast<QQnxEglWindow*>(surface);
    platformWindow->windowPosted();
}

void QQnxGLContext::doneCurrent()
{
    QEGLPlatformContext::doneCurrent();
}

QT_END_NAMESPACE