| 1 | /* $OpenBSD: shapes.c,v 1.8 2004/07/10 07:26:24 deraadt Exp $ */
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| 2 | /* $NetBSD: shapes.c,v 1.2 1995/04/22 07:42:44 cgd Exp $ */
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| 3 |
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| 4 | /*-
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| 5 | * Copyright (c) 1992, 1993
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| 6 | * The Regents of the University of California. All rights reserved.
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| 7 | *
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| 8 | * This code is derived from software contributed to Berkeley by
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| 9 | * Chris Torek and Darren F. Provine.
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| 10 | *
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| 11 | * Redistribution and use in source and binary forms, with or without
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| 12 | * modification, are permitted provided that the following conditions
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| 13 | * are met:
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| 14 | * 1. Redistributions of source code must retain the above copyright
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| 15 | * notice, this list of conditions and the following disclaimer.
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| 16 | * 2. Redistributions in binary form must reproduce the above copyright
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| 17 | * notice, this list of conditions and the following disclaimer in the
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| 18 | * documentation and/or other materials provided with the distribution.
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| 19 | * 3. Neither the name of the University nor the names of its contributors
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| 20 | * may be used to endorse or promote products derived from this software
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| 21 | * without specific prior written permission.
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| 22 | *
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| 23 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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| 24 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 25 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 26 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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| 27 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 28 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 29 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 30 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 31 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 32 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 33 | * SUCH DAMAGE.
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| 34 | *
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| 35 | * @(#)shapes.c 8.1 (Berkeley) 5/31/93
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| 36 | */
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| 37 |
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| 38 | /** @addtogroup tetris
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| 39 | * @{
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| 40 | */
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| 41 | /** @file
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| 42 | */
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| 43 |
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| 44 | /*
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| 45 | * Tetris shapes and related routines.
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| 46 | *
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| 47 | * Note that the first 7 are `well known'.
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| 48 | */
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| 49 |
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| 50 | #include <unistd.h>
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| 51 | #include "tetris.h"
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| 52 |
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| 53 | #define TL (-B_COLS - 1) /* top left */
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| 54 | #define TC (-B_COLS) /* top center */
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| 55 | #define TR (-B_COLS + 1) /* top right */
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| 56 | #define ML -1 /* middle left */
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| 57 | #define MR 1 /* middle right */
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| 58 | #define BL (B_COLS - 1) /* bottom left */
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| 59 | #define BC B_COLS /* bottom center */
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| 60 | #define BR (B_COLS + 1) /* bottom right */
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| 61 |
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| 62 | const struct shape shapes[] = {
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| 63 | /* 0 */ { 7, 7, { TL, TC, MR }, 0xff042d},
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| 64 | /* 1 */ { 8, 8, { TC, TR, ML }, 0xff9304},
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| 65 | /* 2 */ { 9, 11, { ML, MR, BC }, 0xbeff04},
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| 66 | /* 3 */ { 3, 3, { TL, TC, ML }, 0x63ff04},
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| 67 | /* 4 */ { 12, 14, { ML, BL, MR }, 0xce04ff},
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| 68 | /* 5 */ { 15, 17, { ML, BR, MR }, 0xff04cf},
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| 69 | /* 6 */ { 18, 18, { ML, MR, 2 }, 0x7604ff}, /* sticks out */
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| 70 | /* 7 */ { 0, 0, { TC, ML, BL }, 0xff042d},
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| 71 | /* 8 */ { 1, 1, { TC, MR, BR }, 0xff9304},
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| 72 | /* 9 */ { 10, 2, { TC, MR, BC }, 0xbeff04},
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| 73 | /* 10 */ { 11, 9, { TC, ML, MR }, 0xbeff04},
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| 74 | /* 11 */ { 2, 10, { TC, ML, BC }, 0xbeff04},
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| 75 | /* 12 */ { 13, 4, { TC, BC, BR }, 0xce04ff},
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| 76 | /* 13 */ { 14, 12, { TR, ML, MR }, 0xce04ff},
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| 77 | /* 14 */ { 4, 13, { TL, TC, BC }, 0xce04ff},
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| 78 | /* 15 */ { 16, 5, { TR, TC, BC }, 0xff04cf},
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| 79 | /* 16 */ { 17, 15, { TL, MR, ML }, 0xff04cf},
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| 80 | /* 17 */ { 5, 16, { TC, BC, BL }, 0xff04cf},
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| 81 | /* 18 */ { 6, 6, { TC, BC, 2 * B_COLS }, 0x7604ff} /* sticks out */
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| 82 | };
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| 83 |
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| 84 | /*
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| 85 | * Return true iff the given shape fits in the given position,
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| 86 | * taking the current board into account.
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| 87 | */
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| 88 | int fits_in(const struct shape *shape, int pos)
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| 89 | {
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| 90 | const int *o = shape->off;
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| 91 |
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| 92 | if ((board[pos]) || (board[pos + *o++]) || (board[pos + *o++]) ||
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| 93 | (board[pos + *o]))
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| 94 | return 0;
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| 95 |
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| 96 | return 1;
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| 97 | }
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| 98 |
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| 99 | /*
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| 100 | * Write the given shape into the current board, turning it on
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| 101 | * if `onoff' is 1, and off if `onoff' is 0.
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| 102 | */
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| 103 | void place(const struct shape *shape, int pos, int onoff)
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| 104 | {
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| 105 | const int *o = shape->off;
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| 106 |
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| 107 | board[pos] = onoff ? shape->color : 0x000000;
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| 108 | board[pos + *o++] = onoff ? shape->color : 0x000000;
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| 109 | board[pos + *o++] = onoff ? shape->color : 0x000000;
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| 110 | board[pos + *o] = onoff ? shape->color : 0x000000;
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| 111 | }
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| 112 |
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| 113 | /** @}
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| 114 | */
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