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143 lines
3.4 KiB
C++
143 lines
3.4 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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/// OpenGL Mathematics (glm.g-truc.net)
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///
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/// Copyright (c) 2005 - 2013 G-Truc Creation (www.g-truc.net)
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/// Permission is hereby granted, free of charge, to any person obtaining a copy
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/// of this software and associated documentation files (the "Software"), to deal
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/// in the Software without restriction, including without limitation the rights
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/// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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/// copies of the Software, and to permit persons to whom the Software is
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/// furnished to do so, subject to the following conditions:
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///
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/// The above copyright notice and this permission notice shall be included in
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/// all copies or substantial portions of the Software.
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///
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/// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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/// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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/// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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/// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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/// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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/// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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/// THE SOFTWARE.
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///
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/// @ref test
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/// @file test/gtc/packing.cpp
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/// @date 2013-08-09 / 2013-08-09
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/// @author Christophe Riccio
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///////////////////////////////////////////////////////////////////////////////////
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#include <glm/glm.hpp>
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#include <glm/gtc/packing.hpp>
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void print_bits(glm::half const & s)
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{
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union
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{
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glm::detail::hdata h;
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unsigned short i;
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} uif;
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uif.h = s._data();
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printf("f16: ");
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for(std::size_t j = sizeof(s) * 8; j > 0; --j)
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{
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if(j == 10 || j == 15)
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printf(" ");
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printf("%d", (uif.i & (1 << (j - 1))) ? 1 : 0);
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}
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}
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void print_bits(float const & s)
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{
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union
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{
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float f;
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unsigned int i;
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} uif;
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uif.f = s;
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printf("f32: ");
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for(std::size_t j = sizeof(s) * 8; j > 0; --j)
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{
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if(j == 23 || j == 31)
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printf(" ");
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printf("%d", (uif.i & (1 << (j - 1))) ? 1 : 0);
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}
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}
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void print_10bits(glm::uint const & s)
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{
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printf("10b: ");
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for(std::size_t j = 10; j > 0; --j)
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{
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if(j == 5)
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printf(" ");
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printf("%d", (s & (1 << (j - 1))) ? 1 : 0);
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}
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}
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void print_11bits(glm::uint const & s)
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{
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printf("11b: ");
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for(std::size_t j = 11; j > 0; --j)
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{
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if(j == 6)
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printf(" ");
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printf("%d", (s & (1 << (j - 1))) ? 1 : 0);
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}
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}
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void print_value(float const & s)
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{
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printf("%2.5f, ", s);
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print_bits(s);
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printf(", ");
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print_bits(glm::half(s));
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printf(", ");
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print_11bits(detail::floatTo11bit(s));
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printf(", ");
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print_10bits(detail::floatTo10bit(s));
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printf("\n");
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}
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int test_half()
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{
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int Error = 0;
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print_value(0.0);
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print_value(0.1);
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print_value(0.2);
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print_value(0.3);
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print_value(0.4);
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print_value(0.5);
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print_value(0.6);
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print_value(1.0);
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print_value(1.1);
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print_value(1.2);
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print_value(1.3);
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print_value(1.4);
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print_value(1.5);
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print_value(1.6);
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print_value(2.0);
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print_value(2.1);
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print_value(2.2);
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print_value(2.3);
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print_value(2.4);
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print_value(2.5);
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print_value(2.6);
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return Error;
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}
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int main()
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{
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int Error(0);
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Error += test_half();
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return Error;
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}
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