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#include "video-widget.hpp"
#include "compat/check-visible.hpp"
#include "compat/math.hpp"
#include <cstddef>
#include <cstring>
#include <QPainter>
void video_widget::init_image_nolock()
{
texture = QImage(W, H, QImage::Format_ARGB32);
texture.setDevicePixelRatio(devicePixelRatioF());
}
video_widget::video_widget(QWidget* parent) : QWidget(parent)
{
W = width(); H = height();
init_image_nolock(); texture.fill(Qt::gray);
connect(&timer, &QTimer::timeout, this, &video_widget::update_and_repaint, Qt::DirectConnection);
timer.start(65);
}
void video_widget::update_image(const QImage& img)
{
if (freshp.load(std::memory_order_relaxed))
return;
QMutexLocker l(&mtx);
unsigned nbytes = (unsigned)(img.bytesPerLine() * img.height());
vec.resize(nbytes); vec.shrink_to_fit();
std::memcpy(vec.data(), img.constBits(), nbytes);
texture = QImage((const unsigned char*) vec.data(), img.width(), img.height(), img.bytesPerLine(), img.format());
texture.setDevicePixelRatio(devicePixelRatioF());
freshp.store(true, std::memory_order_relaxed);
}
void video_widget::paintEvent(QPaintEvent*)
{
QMutexLocker foo(&mtx);
QPainter painter(this);
painter.drawImage(rect(), texture);
}
void video_widget::update_and_repaint()
{
if (!freshp.load(std::memory_order_relaxed))
return;
if (!check_is_visible())
return;
QMutexLocker l(&mtx);
repaint();
freshp.store(false, std::memory_order_relaxed);
}
void video_widget::resizeEvent(QResizeEvent*)
{
QMutexLocker l(&mtx);
double dpr = devicePixelRatioF();
W = iround(width() * dpr);
H = iround(height() * dpr);
init_image_nolock();
}
void video_widget::get_preview_size(int& w, int& h)
{
QMutexLocker l(&mtx);
w = W; h = H;
}
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