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///////////////////////////////////////////////////////////////////////////
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//
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// Copyright (c) 2002-2012, Industrial Light & Magic, a division of Lucas
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// Digital Ltd. LLC
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//
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// 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 are
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// met:
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// * 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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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Industrial Light & Magic nor the names of
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// its contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR 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 USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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///////////////////////////////////////////////////////////////////////////
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#include <ImfLut.h>
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#include <ImfArray.h>
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#include "ImathRandom.h"
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#include <iostream>
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#include <assert.h>
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using namespace OPENEXR_IMF_NAMESPACE;
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using namespace std;
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using namespace IMATH_NAMESPACE;
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namespace {
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half
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one (half)
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{
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return 1;
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}
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void
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testHalfLut ()
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{
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const int NX = 67;
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const int NY = 31;
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Array2D<half> h (NY, NX);
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HalfLut lut (one);
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//
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// apply (data, nData, stride);
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//
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for (int y = 0; y < NY; ++y)
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for (int x = 0; x < NX; ++x)
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h[y][x] = 0;
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lut.apply (&h[0][0], NX * NY, 1);
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for (int y = 0; y < NY; ++y)
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for (int x = 0; x < NX; ++x)
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assert (h[y][x] == 1);
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//
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// apply (slice, dataWindow);
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//
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for (int y = 0; y < NY; ++y)
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for (int x = 0; x < NX; ++x)
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h[y][x] = 0;
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Slice s (HALF, // type
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(char *) &h[0][0], // base
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sizeof (h[0][0]), // xStride
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sizeof (h[0][0]) * NX, // yStride
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1, 1); // xSampling, ySampling
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Box2i dw (V2i (3, 5), V2i (45, 27));
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lut.apply (s, dw);
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for (int y = 0; y < NY; ++y)
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for (int x = 0; x < NX; ++x)
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if (dw.intersects (V2i (x, y)))
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assert (h[y][x] == 1);
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else
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assert (h[y][x] == 0);
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}
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void
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testRgbaLut ()
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{
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const int NX = 67;
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const int NY = 31;
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Array2D<Rgba> rgba (NY, NX);
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RgbaLut lut (one, WRITE_RGB);
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//
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// apply (data, nData, stride);
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//
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for (int y = 0; y < NY; ++y)
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{
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for (int x = 0; x < NX; ++x)
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{
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rgba[y][x].r = 0;
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rgba[y][x].g = 0;
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rgba[y][x].b = 0;
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rgba[y][x].a = 0;
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}
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}
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lut.apply (&rgba[0][0], NX * NY, 1);
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for (int y = 0; y < NY; ++y)
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{
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for (int x = 0; x < NX; ++x)
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{
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assert (rgba[y][x].r == 1);
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assert (rgba[y][x].g == 1);
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assert (rgba[y][x].b == 1);
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assert (rgba[y][x].a == 0);
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}
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}
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//
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// apply (base, xStride, yStride, dataWindow);
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//
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for (int y = 0; y < NY; ++y)
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{
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for (int x = 0; x < NX; ++x)
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{
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rgba[y][x].r = 0;
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rgba[y][x].g = 0;
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rgba[y][x].b = 0;
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rgba[y][x].a = 0;
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}
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}
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Box2i dw (V2i (3, 5), V2i (45, 27));
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lut.apply (&rgba[0][0], 1, NX, dw);
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for (int y = 0; y < NY; ++y)
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{
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for (int x = 0; x < NX; ++x)
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{
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if (dw.intersects (V2i (x, y)))
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{
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assert (rgba[y][x].r == 1);
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assert (rgba[y][x].g == 1);
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assert (rgba[y][x].b == 1);
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assert (rgba[y][x].a == 0);
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}
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else
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{
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assert (rgba[y][x].r == 0);
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assert (rgba[y][x].g == 0);
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assert (rgba[y][x].b == 0);
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assert (rgba[y][x].a == 0);
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}
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}
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}
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}
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void
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testRounding ()
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{
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//
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// For each rounding function, f,
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// f(f(x)) == f(x) must be true.
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//
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Rand32 rand;
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for (int i = 0; i < 10000; ++i)
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{
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half h = rand.nextf (HALF_MIN, HALF_MAX);
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assert (round12log (h) == round12log (round12log (h)));
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}
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for (int n = 0; n <= 10; ++n)
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{
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roundNBit rn (n);
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for (int i = 0; i < 10000; ++i)
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{
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half h = rand.nextf (HALF_MIN, HALF_MAX);
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assert (rn (h) == rn (rn (h)));
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}
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}
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//
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// Special cases:
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//
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assert (round12log (-1) == 0);
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assert (round12log (0) == 0);
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assert (round12log (0.5) == 0.5);
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assert (round12log (1) == 1);
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assert (round12log (2) == 2);
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roundNBit r3 (3);
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assert (r3 (-1) == -1);
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assert (r3 (0) == 0);
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assert (r3 (0.5) == 0.5);
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assert (r3 (1) == 1);
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assert (r3 (2) == 2);
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}
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} // namespace
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void
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testLut (const std::string&)
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{
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try
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{
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cout << "Testing lookup tables" << endl;
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testHalfLut();
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testRgbaLut();
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testRounding();
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cout << "ok\n" << endl;
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}
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catch (const std::exception &e)
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{
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cerr << "ERROR -- caught exception: " << e.what() << endl;
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assert (false);
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}
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}
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