qmlfrontend/game_view.cpp
author alfadur
Fri, 09 Nov 2018 03:36:21 +0300
changeset 14179 abbb74b9cb62
parent 14154 8354b390f1a2
child 14290 92e5682810d4
permissions -rw-r--r--
generalize adding data to World
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#include "gameview.h"
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#include <QtQuick/qquickwindow.h>
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#include <QCursor>
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#include <QTimer>
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#include <QtGui/QOpenGLContext>
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#include <QtGui/QOpenGLShaderProgram>
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#include "flib.h"
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extern "C" {
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extern GameTick_t* flibGameTick;
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extern ResizeWindow_t* flibResizeWindow;
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extern updateMousePosition_t* flibUpdateMousePosition;
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}
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GameView::GameView() : m_delta(0), m_renderer(nullptr), m_windowChanged(true) {
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  connect(this, &QQuickItem::windowChanged, this,
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          &GameView::handleWindowChanged);
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}
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void GameView::tick(quint32 delta) {
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  m_delta = delta;
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  if (window()) {
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    QTimer* timer = new QTimer(this);
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    connect(timer, &QTimer::timeout, window(), &QQuickWindow::update);
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    timer->start(100);
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    // window()->update();
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  }
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}
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void GameView::handleWindowChanged(QQuickWindow* win) {
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  if (win) {
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    connect(win, &QQuickWindow::beforeSynchronizing, this, &GameView::sync,
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            Qt::DirectConnection);
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    connect(win, &QQuickWindow::sceneGraphInvalidated, this, &GameView::cleanup,
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            Qt::DirectConnection);
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    win->setClearBeforeRendering(false);
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    m_windowChanged = true;
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  }
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}
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void GameView::cleanup() {
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  if (m_renderer) {
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    delete m_renderer;
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    m_renderer = 0;
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  }
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}
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void GameView::sync() {
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  if (!m_renderer) {
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    m_renderer = new GameViewRenderer();
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    connect(window(), &QQuickWindow::beforeRendering, m_renderer,
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            &GameViewRenderer::paint, Qt::DirectConnection);
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  }
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  if (m_windowChanged) {
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    QSize windowSize = window()->size();
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    m_renderer->setViewportSize(windowSize * window()->devicePixelRatio());
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    m_centerX = windowSize.width() / 2;
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    m_centerY = windowSize.height() / 2;
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  }
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  QPoint mousePos = mapFromGlobal(QCursor::pos()).toPoint();
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  if (flibUpdateMousePosition(m_centerX, m_centerY, mousePos.x(), mousePos.y()))
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    QCursor::setPos(mapToGlobal(QPointF(m_centerX, m_centerY)).toPoint());
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  m_renderer->tick(m_delta);
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}
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GameViewRenderer::~GameViewRenderer() {}
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void GameViewRenderer::setViewportSize(const QSize& size) {
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  flibResizeWindow(size.width(), size.height());
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}
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void GameViewRenderer::paint() {
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  if (m_delta == 0) return;
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  flibGameTick(m_delta);
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  // m_window->resetOpenGLState();
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}