+++ /dev/null
-///////////////////////////////////////////////////////////////////////////
-//
-// Copyright (c) 2002, Industrial Light & Magic, a division of Lucas
-// Digital Ltd. LLC
-//
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-// * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-// * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-// * Neither the name of Industrial Light & Magic nor the names of
-// its contributors may be used to endorse or promote products derived
-// from this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-///////////////////////////////////////////////////////////////////////////
-
-
-
-#ifndef INCLUDED_IMF_LUT_H
-#define INCLUDED_IMF_LUT_H
-
-//-----------------------------------------------------------------------------
-//
-// Lookup tables for efficient application
-// of half --> half functions to pixel data,
-// and some commonly applied functions.
-//
-//-----------------------------------------------------------------------------
-
-#include <ImfRgbaFile.h>
-#include <ImfFrameBuffer.h>
-#include "ImathBox.h"
-#include "halfFunction.h"
-
-namespace Imf {
-
-//
-// Lookup table for individual half channels.
-//
-
-class HalfLut
-{
- public:
-
- //------------
- // Constructor
- //------------
-
- template <class Function>
- HalfLut (Function f);
-
-
- //----------------------------------------------------------------------
- // Apply the table to data[0], data[stride] ... data[(nData-1) * stride]
- //----------------------------------------------------------------------
-
- void apply (half *data,
- int nData,
- int stride = 1) const;
-
-
- //---------------------------------------------------------------
- // Apply the table to a frame buffer slice (see ImfFrameBuffer.h)
- //---------------------------------------------------------------
-
- void apply (const Slice &data,
- const Imath::Box2i &dataWindow) const;
-
- private:
-
- halfFunction <half> _lut;
-};
-
-
-//
-// Lookup table for combined RGBA data.
-//
-
-class RgbaLut
-{
- public:
-
- //------------
- // Constructor
- //------------
-
- template <class Function>
- RgbaLut (Function f, RgbaChannels chn = WRITE_RGB);
-
-
- //----------------------------------------------------------------------
- // Apply the table to data[0], data[stride] ... data[(nData-1) * stride]
- //----------------------------------------------------------------------
-
- void apply (Rgba *data,
- int nData,
- int stride = 1) const;
-
-
- //-----------------------------------------------------------------------
- // Apply the table to a frame buffer (see RgbaOutpuFile.setFrameBuffer())
- //-----------------------------------------------------------------------
-
- void apply (Rgba *base,
- int xStride,
- int yStride,
- const Imath::Box2i &dataWindow) const;
-
- private:
-
- halfFunction <half> _lut;
- RgbaChannels _chn;
-};
-
-
-//
-// 12bit log rounding reduces data to 20 stops with 200 steps per stop.
-// That makes 4000 numbers. An extra 96 just come along for the ride.
-// Zero explicitly remains zero. The first non-zero half will map to 1
-// in the 0-4095 12log space. A nice power of two number is placed at
-// the center [2000] and that number is near 0.18.
-//
-
-half round12log (half x);
-
-
-//
-// Round to n-bit precision (n should be between 0 and 10).
-// After rounding, the significand's 10-n least significant
-// bits will be zero.
-//
-
-struct roundNBit
-{
- roundNBit (int n): n(n) {}
- half operator () (half x) {return x.round(n);}
- int n;
-};
-
-
-//
-// Template definitions
-//
-
-
-template <class Function>
-HalfLut::HalfLut (Function f):
- _lut(f, -HALF_MAX, HALF_MAX, half (0),
- half::posInf(), half::negInf(), half::qNan())
-{
- // empty
-}
-
-
-template <class Function>
-RgbaLut::RgbaLut (Function f, RgbaChannels chn):
- _lut(f, -HALF_MAX, HALF_MAX, half (0),
- half::posInf(), half::negInf(), half::qNan()),
- _chn(chn)
-{
- // empty
-}
-
-
-} // namespace Imf
-
-#endif
projects / opencv / blobdiff