1 files changed, 84 insertions, 0 deletions
diff --git a/video/video-widget.cpp b/video/video-widget.cpp
new file mode 100644
index 00000000..3e6d9038
--- /dev/null
+++ b/video/video-widget.cpp
@@ -0,0 +1,84 @@
+#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)
+{
+    QMutexLocker l(&mtx);
+
+    if (freshp)
+        return;
+    freshp = true;
+
+    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());
+}
+
+void video_widget::paintEvent(QPaintEvent*)
+{
+    QMutexLocker foo(&mtx);
+
+    if (texture.width() != W || texture.height() != H)
+    {
+        init_image_nolock();
+        texture.fill(Qt::gray);
+    }
+
+    QPainter painter(this);
+    painter.drawImage(rect(), texture);
+}
+
+void video_widget::update_and_repaint()
+{
+    if (!check_is_visible())
+        return;
+
+    QMutexLocker l(&mtx);
+
+    if (freshp)
+    {
+        freshp = false;
+        repaint();
+    }
+}
+
+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;
+}
+