File indexing completed on 2024-12-22 04:13:03

 /*
  *  SPDX-FileCopyrightText: 2016 Alvin Wong <alvinhochun-at-gmail-com>
  *
  *  SPDX-License-Identifier: GPL-2.0-or-later
  */
 
 #include "KisStabilizerDelayedPaintHelper.h"
 
 constexpr int fixedPaintTimerInterval = 20;
 
 KisStabilizerDelayedPaintHelper::TimedPaintInfo::TimedPaintInfo(int elapsedTime, KisPaintInformation paintInfo)
     : elapsedTime(elapsedTime)
     , paintInfo(paintInfo)
 {
 }
 
 KisStabilizerDelayedPaintHelper::KisStabilizerDelayedPaintHelper()
 {
     connect(&m_paintTimer, SIGNAL(timeout()), SLOT(stabilizerDelayedPaintTimer()));
 }
 
 void KisStabilizerDelayedPaintHelper::start(const KisPaintInformation &firstPaintInfo) {
     if (running()) {
         cancel();
     }
     m_paintTimer.setInterval(fixedPaintTimerInterval);
     m_paintTimer.start();
     m_elapsedTimer.start();
     m_lastPendingTime = m_elapsedTimer.elapsed();
     m_lastPaintTime = m_lastPendingTime;
     m_paintQueue.enqueue(TimedPaintInfo(m_lastPendingTime, firstPaintInfo));
 }
 
 void KisStabilizerDelayedPaintHelper::update(const QVector<KisPaintInformation> &newPaintInfos) {
     int now = m_elapsedTimer.elapsed();
     int delayedPaintInterval = m_elapsedTimer.elapsed() - m_lastPendingTime;
     for (int i = 0; i < newPaintInfos.size(); i++) {
         // TODO: Risk of overflowing?
         int offsetTime = (delayedPaintInterval * i) / newPaintInfos.size();
         m_paintQueue.enqueue(TimedPaintInfo(now + offsetTime, newPaintInfos[i]));
     }
     m_lastPendingTime = now;
 }
 
 void KisStabilizerDelayedPaintHelper::paintSome() {
     // This function is also called from KisToolFreehandHelper::paint
     m_lastPaintTime = m_elapsedTimer.elapsed();
     if (m_paintQueue.isEmpty()) {
         return;
     }
     int now = m_lastPaintTime;
     // Always keep one in the queue since painting requires two points
     while (m_paintQueue.size() > 1 && m_paintQueue.head().elapsedTime <= now) {
         const TimedPaintInfo dequeued = m_paintQueue.dequeue();
         m_paintLine(dequeued.paintInfo, m_paintQueue.head().paintInfo);
     }
 }
 
 void KisStabilizerDelayedPaintHelper::end() {
     m_paintTimer.stop();
     m_elapsedTimer.invalidate();
     if (m_paintQueue.isEmpty()) {
         return;
     }
     TimedPaintInfo dequeued = m_paintQueue.dequeue();
     while (!m_paintQueue.isEmpty()) {
         const TimedPaintInfo dequeued2 = m_paintQueue.dequeue();
         m_paintLine(dequeued.paintInfo, dequeued2.paintInfo);
         dequeued = dequeued2;
     }
 }
 
 void KisStabilizerDelayedPaintHelper::cancel() {
     m_paintTimer.stop();
     m_paintQueue.clear();
 }
 
 void KisStabilizerDelayedPaintHelper::stabilizerDelayedPaintTimer() {
     if (m_elapsedTimer.elapsed() - m_lastPaintTime < fixedPaintTimerInterval) {
         return;
     }
     paintSome();
     // Explicitly update the outline because this is outside the pointer event
     m_requestUpdateOutline();
 }