//
// Copyright 2020 Electronic Arts Inc.
//
// TiberianDawn.DLL and RedAlert.dll and corresponding source code is free 
// software: you can redistribute it and/or modify it under the terms of 
// the GNU General Public License as published by the Free Software Foundation, 
// either version 3 of the License, or (at your option) any later version.

// TiberianDawn.DLL and RedAlert.dll and corresponding source code is distributed 
// in the hope that it will be useful, but with permitted additional restrictions 
// under Section 7 of the GPL. See the GNU General Public License in LICENSE.TXT 
// distributed with this program. You should have received a copy of the 
// GNU General Public License along with permitted additional restrictions 
// with this program. If not, see https://github.com/electronicarts/CnC_Remastered_Collection

/* $Header:   F:\projects\c&c\vcs\code\monoc.h_v   2.17   16 Oct 1995 16:45:28   JOE_BOSTIC  $ */
/***********************************************************************************************
 ***              C O N F I D E N T I A L  ---  W E S T W O O D  S T U D I O S               ***
 ***********************************************************************************************
 *                                                                                             *
 *                 Project Name : Command & Conquer                                            *
 *                                                                                             *
 *                    File Name : MONO.H                                                       *
 *                                                                                             *
 *                   Programmer : Joe L. Bostic                                                *
 *                                                                                             *
 *                   Start Date : July 2, 1994                                                 *
 *                                                                                             *
 *                  Last Update : July 2, 1994   [JLB]                                         *
 *                                                                                             *
 *---------------------------------------------------------------------------------------------*
 * Functions:                                                                                  *
 * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */

#ifndef MONOC_H
#define MONOC_H

//#include	"dpmi.h"
//#include	"function.h"

class MonoClass {
		/*
		**	This is a private structure that is used to control which characters
		**	are used when a box is drawn. Line drawing on the monochrome screen is
		**	really made up of characters. This specifies which characters to use.
		*/
		typedef struct {
			unsigned char	UpperLeft;
			unsigned char	TopEdge;
			unsigned char	UpperRight;
			unsigned char	RightEdge;
			unsigned char	BottomRight;
			unsigned char	BottomEdge;
			unsigned char	BottomLeft;
			unsigned char	LeftEdge;
		} BoxDataType;

		/*
		**	Each cell is constructed of the actual character that is displayed and the
		**	attribute to use. This character pair is located at every position on the
		**	display (80 x 25). Since this cell pair can be represented by a "short"
		**	integer, certain speed optimizations are taken in the monochrome drawing
		**	code.
		*/
		typedef struct {
			char Character;			// Character to display.
			char Attribute;			// Attribute.
		} CellType;

		/*
		**	These private constants are used in the various monochrome operations.
		*/
		enum MonoClassPortEnums {
			CONTROL_PORT=0x03B4,			// CRTC control register.
			DATA_PORT=0x03B5,				// CRTC data register.
			COLUMNS=80,						// Number of columns.
			LINES=25,						// Number of lines.
			SIZE_OF_PAGE=LINES*COLUMNS*sizeof(CellType),	// Entire page size.
			DEFAULT_ATTRIBUTE=0x02		// Normal white on black color attribute.
		};

	public:
		enum MonoClassPageEnums {
			MAX_MONO_PAGES=16,	// Maximum RAM pages on mono card.
			SEGMENT=0xB000  		// Monochrome screen segment.
		};

		/*
		**	These are the various box styles that may be used.
		*/
		typedef enum BoxStyleType {
			SINGLE,				// Single thickness.
			DOUBLE_HORZ,		// Double thick on the horizontal axis.
			DOUBLE_VERT,		// Double thick on the vertical axis.
			DOUBLE,				// Double thickness.

			COUNT
		} BoxStyleType;

		MonoClass(void);
		~MonoClass(void);

		static void Enable(void) {Enabled = 1;};
		static void Disable(void) {Enabled = 0;};
		static int Is_Enabled(void) {return Enabled;};
		static MonoClass * Get_Current(void) {return PageUsage[0];};

		void Draw_Box(int x, int y, int w, int h, char attrib=DEFAULT_ATTRIBUTE, BoxStyleType thick=SINGLE);
		void Set_Default_Attribute(char attrib) {Attrib = attrib;};
		void Clear(void);
		void Set_Cursor(int x, int y);
		void Print(char const *text);
		void Print(int text);
		void Printf(char const *text, ...);
		void Printf(int text, ...);
		void Text_Print(char const *text, int x, int y, char attrib=DEFAULT_ATTRIBUTE);
		void Text_Print(int text, int x, int y, char attrib=DEFAULT_ATTRIBUTE);
		void View(void);
		int Get_X(void) const {return X;};
		int Get_Y(void) const {return Y;};

		/*
		**	Handles deep copies for the mono class objects. This performs what is essentially
		**	a screen copy.
		*/
		MonoClass & operator = (MonoClass const & );

		/*
		**	This merely makes a duplicate of the mono object into a newly created mono
		**	object.
		*/
		MonoClass (MonoClass const &);

	private:
		char	X;					// Cursor X position.
		char	Y;					// Cursor Y position.
		char	Attrib;			// Normal attribute to use if none specified.
		char	Page;				// The current page to write to.

		/*
		**	Helper functions to help with display operations.
		*/
		int Offset(int x=0, int y=0) const {return (SIZE_OF_PAGE*Page) + sizeof(CellType)*(x + (y*COLUMNS));};
		void Scroll(int lines);
		void Store_Cell(CellType &cell, int x, int y) {
			*(CellType *)((long)MonoSegment + Offset(x, y)) = cell;
		};

		/*
		**	This is the segment/selector of the monochrome screen.
		*/
//		static DOSSegmentClass MonoSegment;
		static void * MonoSegment;

		/*
		** This the the arrays of characters used for drawing boxes.
		*/
		static BoxDataType const CharData[4];

		/*
		**	This array contains pointers to the monochrome objects that are assigned
		**	to each of the monochrome pages. As the monochrome pages are made visible,
		**	they can be shuffled around between the actual locations. The first entry
		**	in this table is the one that is visible.
		*/
		static MonoClass * PageUsage[MAX_MONO_PAGES];

		/*
		**	If this is true, then monochrome output is allowed. It defaults to false
		**	so that monochrome output must be explicitly enabled.
		*/
		static int Enabled;
};

//extern int cdecl Mono_Printf(int string, ...);


void Mono_Set_Cursor(int x, int y);
int Mono_Printf(char const *string, ...);
void Mono_Clear_Screen(void);
void Mono_Text_Print(void const *text, int x, int y, int attrib);
void Mono_Draw_Rect(int x, int y, int w, int h, int attrib, int thick);
void Mono_Print(void const *text);
int Mono_X(void);
int Mono_Y(void);

#endif
