qcam: Convert to pragma once

Remove the verbose #ifndef/#define/#endif pattern for maintaining
header idempotency, and replace it with a simple #pragma once.

This simplifies the headers, and prevents redundant changes when
header files get moved.

Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com>

src/qcam/dng_writer.h

@@ -4,8 +4,8 @@
  *
  * dng_writer.h - DNG writer
  */
-#ifndef __QCAM_DNG_WRITER_H__
-#define __QCAM_DNG_WRITER_H__
+
+#pragma once
 
 #ifdef HAVE_TIFF
 #define HAVE_DNG
@@ -25,5 +25,3 @@ public:
 };
 
 #endif /* HAVE_TIFF */
-
-#endif /* __QCAM_DNG_WRITER_H__ */

src/qcam/format_converter.h

@@ -4,8 +4,8 @@
  *
  * format_convert.h - qcam - Convert buffer to RGB
  */
-#ifndef __QCAM_FORMAT_CONVERTER_H__
-#define __QCAM_FORMAT_CONVERTER_H__
+
+#pragma once
 
 #include <stddef.h>
 
@@ -60,5 +60,3 @@ private:
 	unsigned int y_pos_;
 	unsigned int cb_pos_;
 };
-
-#endif /* __QCAM_FORMAT_CONVERTER_H__ */

src/qcam/main_window.h

@@ -4,8 +4,8 @@
  *
  * main_window.h - qcam - Main application window
  */
-#ifndef __QCAM_MAIN_WINDOW_H__
-#define __QCAM_MAIN_WINDOW_H__
+
+#pragma once
 
 #include <memory>
 #include <vector>
@@ -126,5 +126,3 @@ private:
 
 	std::vector<std::unique_ptr<libcamera::Request>> requests_;
 };
-
-#endif /* __QCAM_MAIN_WINDOW__ */

src/qcam/message_handler.h

@@ -4,8 +4,8 @@
  *
  * message_handler.cpp - qcam - Log message handling
  */
-#ifndef __QCAM_MESSAGE_HANDLER_H__
-#define __QCAM_MESSAGE_HANDLER_H__
+
+#pragma once
 
 #include <QtGlobal>
 
@@ -22,5 +22,3 @@ private:
 	static QtMessageHandler handler_;
 	static bool verbose_;
 };
-
-#endif /* __QCAM_MESSAGE_HANDLER_H__ */

src/qcam/viewfinder.h

@@ -4,8 +4,8 @@
  *
  * viewfinder.h - qcam - Viewfinder base class
  */
-#ifndef __QCAM_VIEWFINDER_H__
-#define __QCAM_VIEWFINDER_H__
+
+#pragma once
 
 #include <QImage>
 #include <QList>
@@ -30,5 +30,3 @@ public:
 
 	virtual QImage getCurrentImage() = 0;
 };
-
-#endif /* __QCAM_VIEWFINDER_H__ */

src/qcam/viewfinder_gl.h

@@ -5,8 +5,8 @@
  * viewfinder_GL.h - OpenGL Viewfinder for rendering by OpenGL shader
  *
  */
-#ifndef __VIEWFINDER_GL_H__
-#define __VIEWFINDER_GL_H__
+
+#pragma once
 
 #include <array>
 #include <memory>
@@ -103,5 +103,3 @@ private:
 
 	QMutex mutex_; /* Prevent concurrent access to image_ */
 };
-
-#endif /* __VIEWFINDER_GL_H__ */

src/qcam/viewfinder_qt.h

@@ -4,8 +4,8 @@
  *
  * viewfinder_qt.h - qcam - QPainter-based ViewFinder
  */
-#ifndef __QCAM_VIEWFINDER_QT_H__
-#define __QCAM_VIEWFINDER_QT_H__
+
+#pragma once
 
 #include <QIcon>
 #include <QImage>
@@ -61,5 +61,3 @@ private:
 	QImage image_;
 	QMutex mutex_; /* Prevent concurrent access to image_ */
 };
-
-#endif /* __QCAM_VIEWFINDER_QT_H__ */