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#include "qwasmscreen.h"
#include "qwasmwindow.h"
#include "qwasmcompositor.h"

#include <QtEglSupport/private/qeglconvenience_p.h>
#ifndef QT_NO_OPENGL
# include <QtEglSupport/private/qeglplatformcontext_p.h>
#endif
#include <qpa/qwindowsysteminterface.h>
#include <QtCore/qcoreapplication.h>
#include <QtGui/qguiapplication.h>
#include <private/qhighdpiscaling_p.h>


QT_BEGIN_NAMESPACE

QWasmScreen::QWasmScreen(QWasmCompositor *compositor)
    : m_compositor(compositor)
    , m_depth(32)
    , m_format(QImage::Format_RGB32)
{
    m_compositor->setScreen(this);
}

QWasmScreen::~QWasmScreen()
{

}

QRect QWasmScreen::geometry() const
{
    return m_geometry;
}

int QWasmScreen::depth() const
{
    return m_depth;
}

QImage::Format QWasmScreen::format() const
{
    return m_format;
}

qreal QWasmScreen::devicePixelRatio() const
{
    // FIXME: The effective device pixel ratio may be different from the
    // HTML window dpr if the OpenGL driver/GPU allocates a less than
    // full resolution surface. Use emscripten_webgl_get_drawing_buffer_size()
    // and compute the dpr instead.
    double htmlWindowDpr = EM_ASM_DOUBLE({
        return window.devicePixelRatio;
    });
    return qreal(htmlWindowDpr);
}

QPlatformCursor *QWasmScreen::cursor() const
{
    return const_cast<QWasmCursor *>(&m_cursor);
}

void QWasmScreen::resizeMaximizedWindows()
{
    QPlatformScreen::resizeMaximizedWindows();
}

QWindow *QWasmScreen::topWindow() const
{
    return m_compositor->keyWindow();
}

QWindow *QWasmScreen::topLevelAt(const QPoint &p) const
{
    return m_compositor->windowAt(p);
}

void QWasmScreen::invalidateSize()
{
    m_geometry = QRect();
}

void QWasmScreen::setGeometry(const QRect &rect)
{
    m_geometry = rect;
    QWindowSystemInterface::handleScreenGeometryChange(QPlatformScreen::screen(), geometry(), availableGeometry());
    resizeMaximizedWindows();
}

QT_END_NAMESPACE