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/* Copyright (c) 1992 Regents of the University of California */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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static const char RCSid[] = "$Id$"; |
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#endif |
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/* |
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* Integer operations on COLR scanlines |
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*/ |
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/* ==================================================================== |
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* The Radiance Software License, Version 1.0 |
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* |
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* Copyright (c) 1990 - 2002 The Regents of the University of California, |
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* through Lawrence Berkeley National Laboratory. All rights reserved. |
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* |
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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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* are met: |
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* |
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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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* |
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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 |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* |
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* 3. The end-user documentation included with the redistribution, |
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* if any, must include the following acknowledgment: |
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* "This product includes Radiance software |
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* (http://radsite.lbl.gov/) |
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* developed by the Lawrence Berkeley National Laboratory |
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* (http://www.lbl.gov/)." |
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* Alternately, this acknowledgment may appear in the software itself, |
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* if and wherever such third-party acknowledgments normally appear. |
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* |
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* 4. The names "Radiance," "Lawrence Berkeley National Laboratory" |
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* and "The Regents of the University of California" must |
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* not be used to endorse or promote products derived from this |
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* software without prior written permission. For written |
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* permission, please contact [email protected]. |
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* |
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* 5. Products derived from this software may not be called "Radiance", |
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* nor may "Radiance" appear in their name, without prior written |
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* permission of Lawrence Berkeley National Laboratory. |
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* |
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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* DISCLAIMED. IN NO EVENT SHALL Lawrence Berkeley National Laboratory OR |
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* ==================================================================== |
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* |
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* This software consists of voluntary contributions made by many |
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* individuals on behalf of Lawrence Berkeley National Laboratory. For more |
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* information on Lawrence Berkeley National Laboratory, please see |
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* <http://www.lbl.gov/>. |
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*/ |
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#include <math.h> |
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#include "color.h" |
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#define NULL 0 |
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static BYTE (*g_bval)[256] = NULL; |
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extern double pow(); |
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int |
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setcolrcor(f, a2) /* set brightness correction */ |
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double (*f)(); |
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double a2; |
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} |
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int |
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setcolrinv(f, a2) /* set inverse brightness correction */ |
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double (*f)(); |
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double a2; |
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/* compute gamb -> colr mapping */ |
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i = 0; |
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mult = 256.0; |
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for (j = 255; j > 0; j--) { |
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while ((g_mant[j] = mult * (*f)(j/256.0, a2)) < 128) { |
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for (j = 256; j--; ) { |
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while ((g_mant[j] = mult * (*f)((j+.5)/256.0, a2)) < 128) { |
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i++; |
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mult *= 2.0; |
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} |
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g_nexp[j] = i; |
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} |
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g_mant[0] = 0; |
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g_nexp[0] = COLXS; |
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return(0); |
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} |
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int |
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setcolrgam(g) /* set gamma conversion */ |
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double g; |
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{ |
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} |
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int |
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colrs_gambs(scan, len) /* convert scanline of colrs to gamma bytes */ |
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register COLR *scan; |
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int len; |
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} |
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int |
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gambs_colrs(scan, len) /* convert gamma bytes to colr scanline */ |
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register COLR *scan; |
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int len; |
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} |
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void |
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shiftcolrs(scan, len, adjust) /* shift a scanline of colors by 2^adjust */ |
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register COLR *scan; |
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register int len; |
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} |
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void |
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normcolrs(scan, len, adjust) /* normalize a scanline of colrs */ |
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register COLR *scan; |
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int len; |