/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
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** This file is part of the examples of the Qt Wayland module
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#include "compositor.h"
#include "window.h"

#include <QtWaylandCompositor/qwaylandoutput.h>
#include <QOpenGLFunctions>

GLuint View::getTexture() {
    if (advance()) {
        QOpenGLFunctions *functions = QOpenGLContext::currentContext()->functions();
        if (m_texture)
            functions->glDeleteTextures(1, &m_texture);

        functions->glGenTextures(1, &m_texture);
        functions->glBindTexture(GL_TEXTURE_2D, m_texture);
        functions->glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
        currentBuffer().bindToTexture();
    }
    return m_texture;
}

bool View::isCursor() const
{
    return surface()->isCursorSurface();
}

Compositor::Compositor(Window *window)
    : QWaylandCompositor()
    , m_window(window)
{
}

Compositor::~Compositor()
{
}

void Compositor::create()
{
    new QWaylandOutput(this, m_window);
    QWaylandCompositor::create();

    connect(this, &QWaylandCompositor::surfaceCreated, this, &Compositor::onSurfaceCreated);
}

void Compositor::onSurfaceCreated(QWaylandSurface *surface)
{
    connect(surface, &QWaylandSurface::surfaceDestroyed, this, &Compositor::onSurfaceDestroyed);
    connect(surface, &QWaylandSurface::redraw, this, &Compositor::triggerRender);
    View *view = new View;
    view->setSurface(surface);
    view->setOutput(outputFor(m_window));
    m_views << view;
    connect(view, &QWaylandView::surfaceDestroyed, this, &Compositor::viewSurfaceDestroyed);
}

void Compositor::onSurfaceDestroyed()
{
    triggerRender();
}

void Compositor::viewSurfaceDestroyed()
{
    View *view = qobject_cast<View*>(sender());
    m_views.removeAll(view);
    delete view;
}

void Compositor::triggerRender()
{
    m_window->requestUpdate();
}

void Compositor::startRender()
{
    QWaylandOutput *out = defaultOutput();
    if (out)
        out->frameStarted();
}

void Compositor::endRender()
{
    QWaylandOutput *out = defaultOutput();
    if (out)
        out->sendFrameCallbacks();
}
