70 lines
1.7 KiB
C++
70 lines
1.7 KiB
C++
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/* ScummVM - Scumm Interpreter
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* Copyright (C) 2001/2002 The ScummVM project
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* $Header$
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*
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*/
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#include <stdafx.h>
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#include "color.h"
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Color::Color() : _r(0), _g(0), _b(0) {
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}
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Color::Color(value_type r, value_type g, value_type b) : _r(r), _g(g), _b(b) {
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}
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Color::Color(const Color & c) : _r(c._r), _g(c._g), _b(c._b) {
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}
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Color & Color::operator=(const Color & c) {
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_r = c._r;
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_g = c._g;
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_b = c._b;
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return *this;
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}
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Color::~Color() {
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}
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Color::value_type Color::red() const {
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return _r;
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}
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Color::value_type Color::green() const {
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return _g;
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}
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Color::value_type Color::blue() const {
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return _b;
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}
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void Color::delta(short * ptr) {
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// This is a very specific method for XPALs.
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int t;
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#define UPDATE_COLOR(c, inc) (((int)((c)) << 7) + (c) + (inc)) >> 7
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#define CHECK_BOUNDS(c) (((c) > 255) ? 255 : (((c) < 0) ? 0 : (c)))
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t = UPDATE_COLOR(_r, ptr[0]);
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_r = CHECK_BOUNDS(t);
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t = UPDATE_COLOR(_g, ptr[1]);
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_g = CHECK_BOUNDS(t);
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t = UPDATE_COLOR(_b, ptr[2]);
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_b = CHECK_BOUNDS(t);
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#undef UPDATE_COLOR
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#undef CHECK_BOUNDS
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}
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