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CD-ROM Magazin 1996 February
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CD_02_96.BIN
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games
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g-chess
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piece.c
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C/C++ Source or Header
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1995-02-22
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/*
C source for GNU CHESS
Revision: 1990-09-30
Modified by Daryl Baker for use in MS WINDOWS environment
Based on Ideas and code segments of Charles Petzold from artices in
MicroSoft Systems Journal.
This file is part of CHESS.
CHESS is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY. No author or distributor accepts responsibility to anyone for
the consequences of using it or for whether it serves any particular
purpose or works at all, unless he says so in writing. Refer to the CHESS
General Public License for full details.
Everyone is granted permission to copy, modify and redistribute CHESS, but
only under the conditions described in the CHESS General Public License.
A copy of this license is supposed to have been given to you along with
CHESS so you can know your rights and responsibilities. It should be in a
file named COPYING. Among other things, the copyright notice and this
notice must be preserved on all copies.
*/
#define NOATOM
#define NOCLIPBOARD
#define NOCREATESTRUCT
#define NOFONT
#define NOREGION
#define NOSOUND
#define NOWH
#define NOWINOFFSETS
#define NOCOMM
#define NOKANJI
#include <windows.h>
#include <stdio.h>
#include "chess.h"
#include "defs.h"
extern struct PIECEBITMAP pieces[6];
#define PIECE_XAXIS 32
#define PIECE_YAXIS 32
static void _NEAR QuerySqCenter ( short x, short y, POINT *pptl);
static short ConvertCoordToIndex ( short x, short y);
static void _NEAR PieceOriginFromCenter ( POINT *pptl);
static void _NEAR QuerySqPieceOrigin ( short x, short y, POINT *pptl);
static void _NEAR DrawOnePiece ( HDC hDC, short x, short y, struct PIECEBITMAP *piece, DWORD color);
static void _NEAR ShowPiece ( HDC hDC, POINT *pptl, struct PIECEBITMAP *Piece_bitmap,
DWORD Color );
static void _NEAR QuerySqCenter ( short x, short y, POINT *pptl)
{
POINT aptl[4];
QuerySqCoords ( x, y, aptl );
pptl->x = (aptl[0].x + aptl[1].x + aptl[2].x + aptl[3].x)/4;
pptl->y = (aptl[0].y + aptl[2].y)/2;
}
static void _NEAR PieceOriginFromCenter ( POINT *pptl)
{
pptl->x -= PIECE_XAXIS / 2;
pptl->y -= PIECE_YAXIS / 2;
}
static void _NEAR QuerySqPieceOrigin ( short x, short y, POINT *pptl)
{
QuerySqCenter ( x, y, pptl);
PieceOriginFromCenter (pptl);
}
/*
Draw a piece in the specificed point
Piece_bitmap is a structure with the handles for the mask,
outline and piece.
*/
static void _NEAR ShowPiece ( HDC hDC, POINT *pptl, struct PIECEBITMAP *Piece_bitmap,
DWORD Color )
{
HDC hMemDC;
HBRUSH hBrush, hOldBrush;
HPEN hOldPen;
hOldBrush = SelectObject ( hDC, GetStockObject (BLACK_BRUSH) );
hOldPen = SelectObject ( hDC, GetStockObject ( BLACK_PEN) );
hMemDC = CreateCompatibleDC ( hDC);
/* Write the mask to clear the space */
SelectObject ( hMemDC, Piece_bitmap->mask);
BitBlt ( hDC, pptl->x, pptl->y, PIECE_XAXIS, PIECE_YAXIS, hMemDC, 0, 0,SRCAND);
/* Write out the piece with an OR */
hBrush = CreateSolidBrush ( Color );
SelectObject ( hDC, hBrush );
SelectObject ( hMemDC, Piece_bitmap->piece);
BitBlt ( hDC, pptl->x, pptl->y, PIECE_XAXIS, PIECE_YAXIS, hMemDC, 0, 0,0xB80746L);
/* The draw the outline */
SelectObject ( hDC, GetStockObject ( BLACK_BRUSH ) );
SelectObject ( hMemDC, Piece_bitmap->outline);
BitBlt ( hDC, pptl->x, pptl->y, PIECE_XAXIS, PIECE_YAXIS, hMemDC, 0, 0, 0xB80746L);
SelectObject ( hDC, hOldBrush );
SelectObject ( hDC, hOldPen );
DeleteObject ( hBrush);
if ( DeleteDC(hMemDC)==0) MessageBeep(0);
}
static short _NEAR ConvertCoordToIndex ( short x, short y)
{
return (y*8 + x );
}
static void _NEAR DrawOnePiece ( HDC hDC, short x, short y, struct PIECEBITMAP *piece, DWORD color)
{
POINT origin;
QuerySqPieceOrigin ( x, y, &origin );
ShowPiece ( hDC, &origin, piece, color);
}
void DrawAllPieces ( HDC hDC, int reverse, short *pbrd, short *color,
DWORD clrblack, DWORD clrwhite )
{
short x,y;
short i;
for ( y=0; y<8; y++) {
for (x=0; x<8; x++) {
i = ConvertCoordToIndex (x, y);
if ( *(color+i) != NETURAL ) {
if (reverse == 0)
DrawOnePiece ( hDC, x, y, pieces+*(pbrd+i), (*(color+i)==BLACK) ? clrblack : clrwhite );
else
DrawOnePiece ( hDC, 7-x, 7-y, pieces+*(pbrd+i), (*(color+i)==BLACK) ? clrblack : clrwhite );
}
}
}
}