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#include "screencanvas.h"
#include <cmath>
#include <QPainter>
#include <QClipboard>
#include <QGuiApplication>
ScreenCanvas::ScreenCanvas(QQuickItem *parent):
QQuickPaintedItem(parent),
m_foreground(QColor(0x00, 0x00, 0x00)),
m_background(QColor(0xFF, 0xFF, 0xFF)),
m_canvas(QImage(1, 1, QImage::Format_RGB32)),
m_zoomFactor(1.0),
m_orientation(Qt::LandscapeOrientation)
{
connect(this, &ScreenCanvas::zoomFactorChanged, this, &ScreenCanvas::updateImplicitSize);
connect(this, &ScreenCanvas::canvasSizeChanged, this, &ScreenCanvas::updateImplicitSize);
}
const ScreenFrame &ScreenCanvas::frame() const
{
static const ScreenFrame dummy {};
return dummy;
}
void ScreenCanvas::setFrame(const ScreenFrame &frame)
{
if(frame.pixelData.isEmpty() || frame.size.isEmpty()) {
return;
}
setCanvasSize(frame.size);
setCanvasOrientation(frame.orientation);
for (auto x = 0; x < m_canvas.width(); x++) {
for (auto y = 0; y < m_canvas.height(); y++) {
const auto i = y / 8 * m_canvas.width() + x;
const auto z = y % 8;
const auto color = ((frame.pixelData.at(i) & (1 << z))) ? m_foreground : m_background;
m_canvas.setPixelColor(x, y, color);
}
}
update();
}
void ScreenCanvas::paint(QPainter *painter)
{
painter->drawImage(canvasRect(), m_canvas.transformed(canvasTransform()));
}
qreal ScreenCanvas::zoomFactor() const
{
return m_zoomFactor;
}
void ScreenCanvas::setZoomFactor(qreal zoom)
{
if(qFuzzyCompare(m_zoomFactor, zoom)) {
return;
}
m_zoomFactor = zoom;
emit zoomFactorChanged();
}
const QColor &ScreenCanvas::foregroundColor() const
{
return m_foreground;
}
void ScreenCanvas::setForegroundColor(const QColor &color)
{
if(color == m_foreground) {
return;
}
m_foreground = color;
emit foregroundColorChanged();
}
const QColor &ScreenCanvas::backgroundColor() const
{
return m_background;
}
void ScreenCanvas::setBackgroundColor(const QColor &color)
{
if(color == m_background) {
return;
}
m_background = color;
emit backgroundColorChanged();
}
bool ScreenCanvas::saveImage(const QUrl &url, int scale)
{
return canvas(scale).save(url.toLocalFile());
}
void ScreenCanvas::copyToClipboard(int scale)
{
qGuiApp->clipboard()->setImage(canvas(scale));
}
void ScreenCanvas::updateImplicitSize()
{
setImplicitSize(m_zoomFactor * m_canvas.width(), m_zoomFactor * m_canvas.height());
}
void ScreenCanvas::setCanvasSize(const QSize &size)
{
if(size == m_canvas.size()) {
return;
}
m_canvas = QImage(size, QImage::Format_RGB32);
m_canvas.fill(m_background);
emit canvasSizeChanged();
}
void ScreenCanvas::setCanvasOrientation(Qt::ScreenOrientation orientation)
{
m_orientation = orientation;
}
QTransform ScreenCanvas::canvasTransform() const
{
switch (m_orientation) {
case Qt::InvertedLandscapeOrientation:
return QTransform().rotate(180);
case Qt::PortraitOrientation:
return QTransform().rotate(isLandscapeOnly() ? 0 : 90);
case Qt::InvertedPortraitOrientation:
return QTransform().rotate(isLandscapeOnly() ? 180 : -90);
case Qt::LandscapeOrientation:
default:
return QTransform();
}
}
QRectF ScreenCanvas::canvasRect() const
{
const auto totalWidth = boundingRect().width();
const auto totalHeight = boundingRect().height();
const auto isRegular = isLandscapeOrientation() || isLandscapeOnly();
const auto canvasWidth = isRegular ? m_canvas.width() : m_canvas.height();
const auto canvasHeight = isRegular ? m_canvas.height() : m_canvas.width();
const auto aspectRatio = static_cast<qreal>(canvasWidth) / canvasHeight;
auto drawWidth = totalWidth;
auto drawHeight = floor(drawWidth / aspectRatio);
if(drawHeight > totalHeight) {
drawHeight = totalHeight;
drawWidth = totalHeight * aspectRatio;
}
if(drawWidth > canvasWidth) {
drawWidth -= (static_cast<int>(drawWidth) % canvasWidth);
}
if(drawHeight > canvasHeight) {
drawHeight -= (static_cast<int>(drawHeight) % canvasHeight);
}
const auto offsetX = (totalWidth - drawWidth) / 2;
const auto offsetY = (totalHeight - drawHeight) / 2;
return QRectF(offsetX, offsetY, drawWidth, drawHeight);
}
QSize ScreenCanvas::canvasSize() const
{
return QSize(isLandscapeOrientation() ? m_canvas.width() : m_canvas.height(),
isLandscapeOrientation() ? m_canvas.height() : m_canvas.width());
}
bool ScreenCanvas::isLandscapeOrientation() const
{
return m_orientation == Qt::LandscapeOrientation ||
m_orientation == Qt::InvertedLandscapeOrientation;
}
bool ScreenCanvas::isLandscapeOnly() const
{
return (boundingRect().width() < canvasSize().width()) ||
(boundingRect().height() < canvasSize().height());
}
const QImage ScreenCanvas::canvas(int scale) const
{
if(scale == 0) {
return m_canvas.scaled(m_canvas.width() * m_zoomFactor, m_canvas.height() * m_zoomFactor).transformed(canvasTransform());
} else {
return m_canvas.scaled(m_canvas.width() * scale, m_canvas.height() * scale).transformed(canvasTransform());
}
}
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