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-rw-r--r--src/apps/qcam/viewfinder_qt.cpp31
1 files changed, 29 insertions, 2 deletions
diff --git a/src/apps/qcam/viewfinder_qt.cpp b/src/apps/qcam/viewfinder_qt.cpp
index 09dd30da..1a238922 100644
--- a/src/apps/qcam/viewfinder_qt.cpp
+++ b/src/apps/qcam/viewfinder_qt.cpp
@@ -40,6 +40,10 @@ ViewFinderQt::ViewFinderQt(QWidget *parent)
: QWidget(parent), place_(rect()), buffer_(nullptr)
{
icon_ = QIcon(":camera-off.svg");
+
+ QPalette pal = palette();
+ pal.setColor(QPalette::Window, Qt::black);
+ setPalette(pal);
}
ViewFinderQt::~ViewFinderQt()
@@ -114,6 +118,11 @@ void ViewFinderQt::render(libcamera::FrameBuffer *buffer, Image *image)
}
}
+ /*
+ * Indicate the widget paints all its pixels, to optimize rendering by
+ * skipping erasing the widget before painting.
+ */
+ setAttribute(Qt::WA_OpaquePaintEvent, true);
update();
if (buffer)
@@ -129,6 +138,11 @@ void ViewFinderQt::stop()
buffer_ = nullptr;
}
+ /*
+ * The logo has a transparent background, reenable erasing the widget
+ * before painting.
+ */
+ setAttribute(Qt::WA_OpaquePaintEvent, false);
update();
}
@@ -143,8 +157,22 @@ void ViewFinderQt::paintEvent(QPaintEvent *)
{
QPainter painter(this);
- /* If we have an image, draw it. */
+ painter.setBrush(palette().window());
+
+ /* If we have an image, draw it, with black letterbox rectangles. */
if (!image_.isNull()) {
+ if (place_.width() < width()) {
+ QRect rect{ 0, 0, (width() - place_.width()) / 2, height() };
+ painter.drawRect(rect);
+ rect.moveLeft(place_.right());
+ painter.drawRect(rect);
+ } else {
+ QRect rect{ 0, 0, width(), (height() - place_.height()) / 2 };
+ painter.drawRect(rect);
+ rect.moveTop(place_.bottom());
+ painter.drawRect(rect);
+ }
+
painter.drawImage(place_, image_, image_.rect());
return;
}
@@ -170,7 +198,6 @@ void ViewFinderQt::paintEvent(QPaintEvent *)
else
point.setY((height() - pixmap_.height()) / 2);
- painter.setBackgroundMode(Qt::OpaqueMode);
painter.drawPixmap(point, pixmap_);
}