qcam: New viewfinder hierarchy

Create ViewFinder base class and rename the original ViewFinder
as QPainter-based ViewFinder.

Signed-off-by: Show Liu <show.liu@linaro.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

1 files changed, 64 insertions, 0 deletions

diff --git a/src/qcam/viewfinder_qt.h b/src/qcam/viewfinder_qt.h
new file mode 100644
index 00000000..d7554288
--- /dev/null
+++ b/src/qcam/viewfinder_qt.h
@@ -0,0 +1,64 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2019, Google Inc.
+ *
+ * viewfinder_qt.h - qcam - QPainter-based ViewFinder
+ */
+#ifndef __QCAM_VIEWFINDER_QT_H__
+#define __QCAM_VIEWFINDER_QT_H__
+
+#include <QIcon>
+#include <QImage>
+#include <QList>
+#include <QMutex>
+#include <QSize>
+#include <QWidget>
+
+#include <libcamera/buffer.h>
+#include <libcamera/formats.h>
+#include <libcamera/pixel_format.h>
+
+#include "format_converter.h"
+#include "viewfinder.h"
+
+class ViewFinderQt : public QWidget, public ViewFinder
+{
+	Q_OBJECT
+
+public:
+	ViewFinderQt(QWidget *parent);
+	~ViewFinderQt();
+
+	const QList<libcamera::PixelFormat> &nativeFormats() const override;
+
+	int setFormat(const libcamera::PixelFormat &format, const QSize &size) override;
+	void render(libcamera::FrameBuffer *buffer, MappedBuffer *map) override;
+	void stop() override;
+
+	QImage getCurrentImage() override;
+
+Q_SIGNALS:
+	void renderComplete(libcamera::FrameBuffer *buffer);
+
+protected:
+	void paintEvent(QPaintEvent *) override;
+	QSize sizeHint() const override;
+
+private:
+	FormatConverter converter_;
+
+	libcamera::PixelFormat format_;
+	QSize size_;
+
+	/* Camera stopped icon */
+	QSize vfSize_;
+	QIcon icon_;
+	QPixmap pixmap_;
+
+	/* Buffer and render image */
+	libcamera::FrameBuffer *buffer_;
+	QImage image_;
+	QMutex mutex_; /* Prevent concurrent access to image_ */
+};
+
+#endif /* __QCAM_VIEWFINDER_QT_H__ */