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#include "qeglfscontext.h"
#include "qeglfswindow.h"
#include "qeglfscursor.h"
#include "qeglfshooks.h"
#include "qeglfsintegration.h"

#include <QtPlatformSupport/private/qeglpbuffer_p.h>
#include <QtGui/QSurface>
#include <QtDebug>

QT_BEGIN_NAMESPACE

QEglFSContext::QEglFSContext(const QSurfaceFormat &format, QPlatformOpenGLContext *share,
                             EGLDisplay display, EGLenum eglApi)
    : QEGLPlatformContext(QEglFSHooks::hooks()->surfaceFormatFor(format), share, display,
                          QEglFSIntegration::chooseConfig(display, QEglFSHooks::hooks()->surfaceFormatFor(format)), eglApi),
      m_swapIntervalSet(false)
{
}

bool QEglFSContext::makeCurrent(QPlatformSurface *surface)
{
    bool success = QEGLPlatformContext::makeCurrent(surface);

    if (success && !m_swapIntervalSet) {
        m_swapIntervalSet = true;
        int swapInterval = 1;
        QByteArray swapIntervalString = qgetenv("QT_QPA_EGLFS_SWAPINTERVAL");
        if (!swapIntervalString.isEmpty()) {
            bool ok;
            swapInterval = swapIntervalString.toInt(&ok);
            if (!ok)
                swapInterval = 1;
        }
        eglSwapInterval(eglDisplay(), swapInterval);
    }

    return success;
}

EGLSurface QEglFSContext::eglSurfaceForPlatformSurface(QPlatformSurface *surface)
{
    if (surface->surface()->surfaceClass() == QSurface::Window)
        return static_cast<QEglFSWindow *>(surface)->surface();
    else
        return static_cast<QEGLPbuffer *>(surface)->pbuffer();
}

void QEglFSContext::swapBuffers(QPlatformSurface *surface)
{
    if (surface->surface()->surfaceClass() == QSurface::Window) {
        QEglFSWindow *window = static_cast<QEglFSWindow *>(surface);
        // draw the cursor
        if (QEglFSCursor *cursor = static_cast<QEglFSCursor *>(window->screen()->cursor()))
            cursor->paintOnScreen();
    }

    QEglFSHooks::hooks()->waitForVSync();
    QEGLPlatformContext::swapBuffers(surface);
}

QT_END_NAMESPACE

