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qcam: viewfinder: Embed QImage in ViewFinder

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The QImage class is a thin wrapper that uses implicit sharing. We can
thus embed it in the ViewFinder class instead of allocating it
dynamically, and assign it at runtime. This simplifies the code.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
This commit is contained in:
Laurent Pinchart 2020-03-23 02:34:36 +02:00
parent 615f7438ad
commit c6cbe507c1
2 changed files with 7 additions and 8 deletions
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12
src/qcam/viewfinder.cpp
View file

@ -16,13 +16,12 @@
#include "format_converter.h"
ViewFinder::ViewFinder(QWidget *parent)
: QWidget(parent), format_(0), image_(nullptr)
: QWidget(parent), format_(0)
{
}
ViewFinder::~ViewFinder()
{
delete image_;
}
void ViewFinder::render(libcamera::FrameBuffer *buffer, MappedBuffer *map)
@ -41,7 +40,7 @@ void ViewFinder::render(libcamera::FrameBuffer *buffer, MappedBuffer *map)
*/
converter_.convert(static_cast<unsigned char *>(map->memory),
buffer->metadata().planes[0].bytesused, image_);
buffer->metadata().planes[0].bytesused, &image_);
update();
renderComplete(buffer);
@ -51,7 +50,7 @@ QImage ViewFinder::getCurrentImage()
{
QMutexLocker locker(&mutex_);
return image_->copy();
return image_.copy();
}
int ViewFinder::setFormat(const libcamera::PixelFormat &format,
@ -66,8 +65,7 @@ int ViewFinder::setFormat(const libcamera::PixelFormat &format,
format_ = format;
size_ = size;
delete image_;
image_ = new QImage(size_, QImage::Format_RGB32);
image_ = QImage(size_, QImage::Format_RGB32);
updateGeometry();
return 0;
@ -76,7 +74,7 @@ int ViewFinder::setFormat(const libcamera::PixelFormat &format,
void ViewFinder::paintEvent(QPaintEvent *)
{
QPainter painter(this);
painter.drawImage(rect(), *image_, image_->rect());
painter.drawImage(rect(), image_, image_.rect());
}
QSize ViewFinder::sizeHint() const

3
src/qcam/viewfinder.h
View file

@ -9,6 +9,7 @@
#include <stddef.h>
#include <QImage>
#include <QMutex>
#include <QSize>
#include <QWidget>
@ -51,7 +52,7 @@ private:
libcamera::PixelFormat format_;
QSize size_;
QImage *image_;
QImage image_;
QMutex mutex_; /* Prevent concurrent access to image_ */
};