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Issue 2001: added vignette filter tool

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This commit is contained in:
torger
2013-11-07 08:00:42 +01:00
parent 1560035cef
commit 540fa3e005
28 changed files with 512 additions and 320 deletions
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27
rtengine/colorclip.h
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@@ -90,6 +90,30 @@ inline double tightestroot (double L, double a, double b, double r1, double r2,
/*******************************************************************************
* FindCubicRoots
* --------------
*
* Copyright (C) 1997-2001 Ken Turkowski. <turk_at_computer.org>
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* ------------------------------------------------------------------------
*
* Solve:
* coeff[3] * x^3 + coeff[2] * x^2 + coeff[1] * x + coeff[0] = 0
@@ -97,6 +121,7 @@ inline double tightestroot (double L, double a, double b, double r1, double r2,
* returns:
* 3 - 3 real roots
* 1 - 1 real root (2 complex conjugate)
*
*******************************************************************************/
/*long
@@ -111,6 +136,7 @@ FindCubicRoots(const FLOAT coeff[4], FLOAT x[3])
double_t Qcubed = Q * Q * Q;
double_t d = Qcubed - R * R;
// Three real roots
if (d >= 0) {
double_t theta = acos(R / sqrt(Qcubed));
double_t sqrtQ = sqrt(Q);
@@ -120,6 +146,7 @@ FindCubicRoots(const FLOAT coeff[4], FLOAT x[3])
return (3);
}
// One real root
else {
double_t e = pow(sqrt(-d) + fabs(R), 1. / 3.);
if (R > 0)