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/* $OpenBSD: shapes.c,v 1.8 2004/07/10 07:26:24 deraadt Exp $ */
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/* $NetBSD: shapes.c,v 1.2 1995/04/22 07:42:44 cgd Exp $ */
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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* This code is derived from software contributed to Berkeley by
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* Chris Torek and Darren F. Provine.
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* @(#)shapes.c 8.1 (Berkeley) 5/31/93
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/** @addtogroup tetris
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* Tetris shapes and related routines.
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* Note that the first 7 are `well known'.
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#define TL (-B_COLS - 1) /* top left */
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#define TC (-B_COLS) /* top center */
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#define TR (-B_COLS + 1) /* top right */
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#define ML -1 /* middle left */
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#define MR 1 /* middle right */
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#define BL (B_COLS - 1) /* bottom left */
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#define BC B_COLS /* bottom center */
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#define BR (B_COLS + 1) /* bottom right */
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const struct shape shapes[] = {
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/* 0 */ { 7, 7, { TL, TC, MR }, 0xff042d},
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/* 1 */ { 8, 8, { TC, TR, ML }, 0xff9304},
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/* 2 */ { 9, 11, { ML, MR, BC }, 0xbeff04},
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/* 3 */ { 3, 3, { TL, TC, ML }, 0x63ff04},
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/* 4 */ { 12, 14, { ML, BL, MR }, 0xce04ff},
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/* 5 */ { 15, 17, { ML, BR, MR }, 0xff04cf},
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/* 6 */ { 18, 18, { ML, MR, 2 }, 0x7604ff}, /* sticks out */
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/* 7 */ { 0, 0, { TC, ML, BL }, 0xff042d},
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/* 8 */ { 1, 1, { TC, MR, BR }, 0xff9304},
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/* 9 */ { 10, 2, { TC, MR, BC }, 0xbeff04},
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/* 10 */ { 11, 9, { TC, ML, MR }, 0xbeff04},
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/* 11 */ { 2, 10, { TC, ML, BC }, 0xbeff04},
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/* 12 */ { 13, 4, { TC, BC, BR }, 0xce04ff},
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/* 13 */ { 14, 12, { TR, ML, MR }, 0xce04ff},
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/* 14 */ { 4, 13, { TL, TC, BC }, 0xce04ff},
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/* 15 */ { 16, 5, { TR, TC, BC }, 0xff04cf},
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/* 16 */ { 17, 15, { TL, MR, ML }, 0xff04cf},
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/* 17 */ { 5, 16, { TC, BC, BL }, 0xff04cf},
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/* 18 */ { 6, 6, { TC, BC, 2 * B_COLS }, 0x7604ff} /* sticks out */
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* Return true iff the given shape fits in the given position,
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* taking the current board into account.
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int fits_in(const struct shape *shape, int pos)
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const int *o = shape->off;
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if ((board[pos]) || (board[pos + *o++]) || (board[pos + *o++]) ||
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* Write the given shape into the current board, turning it on
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* if `onoff' is 1, and off if `onoff' is 0.
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void place(const struct shape *shape, int pos, int onoff)
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const int *o = shape->off;
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board[pos] = onoff ? shape->color : 0x000000;
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board[pos + *o++] = onoff ? shape->color : 0x000000;
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board[pos + *o++] = onoff ? shape->color : 0x000000;
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board[pos + *o] = onoff ? shape->color : 0x000000;