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+/*

+ * Author: Pawel Jablonski

+ * E-mail: pj@xirx.net

+ * WWW: xirx.net

+ * GIT: git.xirx.net

+ *

+ * License: You can use this code however you like

+ * but leave information about the original author.

+ * Code is free for non-commercial and commercial use.

+ */

+

+#ifndef LCD_H

+#define LCD_H

+

+#include <QObject>

+#include <QVector>

+

+#ifdef CHAR_WIDTH

+#undef CHAR_WIDTH

+#endif

+

+//! This class contains LCD functions and buffer

+class LCD : public QObject

+{

+	Q_OBJECT

+

+	public:

+		static const int CHAR_WIDTH = 8; //!< Width of the char in pixels

+		static const int CHAR_HEIGHT = 8; //!< Height of the char in pixels

+

+		static const int WIDTH = 40; //!< Chars per row

+		static const int HEIGHT = 30; //!< Chars per column

+

+		static const int COLOR_MASK = 0x0f; //!< Char color mask, two colors per byte

+		static const int COLOR_SHIFT = 4; //!< Char color shift, background color is high 4 bits, foreground color is low 4 bits

+

+		//! LCD buffer

+		struct Buffer

+		{

+			QVector<QVector<unsigned char>> charData = QVector<QVector<unsigned char>>(HEIGHT, QVector<unsigned char>(WIDTH)); //!< Char buffer

+			QVector<QVector<unsigned char>> colorData = QVector<QVector<unsigned char>>(HEIGHT, QVector<unsigned char>(WIDTH)); //!< Background and foreground color buffer

+		};

+

+		LCD(QObject *parent = nullptr);

+

+		void reset();

+

+		void refresh();

+

+		void clear();

+		void setChar(unsigned char c, int x, int y, unsigned char charColor, unsigned char backgroundColor);

+

+		void scroll();

+

+		void update();

+

+	private:

+		QVector<Buffer> buffer = { Buffer(), Buffer() }; //!< First buffer is using as canvas for painting, the second one is a copy ready to show

+

+	signals:

+		void updateBufferSignal(LCD::Buffer buffer);

+};

+

+#endif