mirror of
https://invent.kde.org/network/krfb
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127 lines
2.6 KiB
C++
127 lines
2.6 KiB
C++
/* This file is part of the KDE project
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Copyright (C) 2007 Alessandro Praduroux <pradu@pradu.it>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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*/
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#include "qtframebuffer.h"
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#include <QTimer>
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#include <QRegion>
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#include <QPixmap>
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#include <QBitmap>
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#include <QGuiApplication>
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#include <QScreen>
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const int UPDATE_TIME = 500;
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QtFrameBuffer::QtFrameBuffer(WId id, QObject *parent)
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: FrameBuffer(id, parent)
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{
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QScreen *screen = QGuiApplication::primaryScreen();
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if (screen) {
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primaryScreen = screen;
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fbImage = screen->grabWindow(win).toImage();
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fb = new char[fbImage.sizeInBytes()];
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} else {
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fb = nullptr;
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primaryScreen = nullptr;
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}
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t = new QTimer(this);
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connect(t, &QTimer::timeout, this, &QtFrameBuffer::updateFrameBuffer);
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}
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QtFrameBuffer::~QtFrameBuffer()
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{
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if (fb)
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delete [] fb;
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fb = nullptr;
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}
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int QtFrameBuffer::depth()
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{
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return fbImage.depth();
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}
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int QtFrameBuffer::height()
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{
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return fbImage.height();
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}
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int QtFrameBuffer::width()
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{
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return fbImage.width();
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}
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void QtFrameBuffer::getServerFormat(rfbPixelFormat &format)
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{
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format.bitsPerPixel = 32;
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format.depth = 32;
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format.trueColour = true;
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format.bigEndian = false;
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format.redShift = 16;
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format.greenShift = 8;
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format.blueShift = 0;
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format.redMax = 0xff;
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format.greenMax = 0xff;
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format.blueMax = 0xff;
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}
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void QtFrameBuffer::updateFrameBuffer()
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{
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if (!fb || !primaryScreen) return;
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QImage img = primaryScreen->grabWindow(win).toImage();
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#if 0 // This is actually slower than updating the whole desktop...
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QSize imgSize = img.size();
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// verify what part of the image need to be marked as changed
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// fbImage is the previous version of the image,
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// img is the current one
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QImage map(imgSize, QImage::Format_Mono);
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map.fill(0);
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for (int x = 0; x < imgSize.width(); x++) {
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for (int y = 0; y < imgSize.height(); y++) {
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if (img.pixel(x, y) != fbImage.pixel(x, y)) {
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map.setPixel(x, y, 1);
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}
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}
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}
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QRegion r(QBitmap::fromImage(map));
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tiles = tiles + r.rects();
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#else
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tiles.append(img.rect());
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#endif
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memcpy(fb, img.bits(), static_cast<size_t>(img.sizeInBytes()));
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fbImage = img;
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}
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int QtFrameBuffer::paddedWidth()
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{
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return fbImage.width() * 4;
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}
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void QtFrameBuffer::startMonitor()
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{
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t->start(UPDATE_TIME);
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}
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void QtFrameBuffer::stopMonitor()
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{
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t->stop();
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}
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