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#include "qeglfskmsgbmwindow.h"
#include "qeglfskmsgbmintegration.h"
#include "qeglfskmsgbmscreen.h"

#include <QtEglSupport/private/qeglconvenience_p.h>

QT_BEGIN_NAMESPACE

void QEglFSKmsGbmWindow::resetSurface()
{
    QEglFSKmsGbmScreen *gbmScreen = static_cast<QEglFSKmsGbmScreen *>(screen());
    EGLDisplay display = gbmScreen->display();
    QSurfaceFormat platformFormat = m_integration->surfaceFormatFor(window()->requestedFormat());
    m_config = QEglFSDeviceIntegration::chooseConfig(display, platformFormat);
    m_format = q_glFormatFromConfig(display, m_config, platformFormat);
    // One fullscreen window per screen -> the native window is simply the gbm_surface the screen created.
    m_window = reinterpret_cast<EGLNativeWindowType>(gbmScreen->createSurface(m_config));

    PFNEGLCREATEPLATFORMWINDOWSURFACEEXTPROC createPlatformWindowSurface = nullptr;
    const char *extensions = eglQueryString(EGL_NO_DISPLAY, EGL_EXTENSIONS);
    if (extensions && (strstr(extensions, "EGL_KHR_platform_gbm") || strstr(extensions, "EGL_MESA_platform_gbm"))) {
        createPlatformWindowSurface = reinterpret_cast<PFNEGLCREATEPLATFORMWINDOWSURFACEEXTPROC>(
            eglGetProcAddress("eglCreatePlatformWindowSurfaceEXT"));
    }

    if (createPlatformWindowSurface) {
        m_surface = createPlatformWindowSurface(display, m_config, reinterpret_cast<void *>(m_window), nullptr);
    } else {
        qCDebug(qLcEglfsKmsDebug, "No eglCreatePlatformWindowSurface for GBM, falling back to eglCreateWindowSurface");
        m_surface = eglCreateWindowSurface(display, m_config, m_window, nullptr);
    }
}

void QEglFSKmsGbmWindow::invalidateSurface()
{
    QEglFSKmsGbmScreen *gbmScreen = static_cast<QEglFSKmsGbmScreen *>(screen());
    QEglFSWindow::invalidateSurface();
    gbmScreen->resetSurface();
}

QT_END_NAMESPACE