glm/test/gtc/gtc_packing.cpp

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///////////////////////////////////////////////////////////////////////////////////
/// OpenGL Mathematics (glm.g-truc.net)
///
/// Copyright (c) 2005 - 2013 G-Truc Creation (www.g-truc.net)
/// 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.
///
/// @ref test
/// @file test/gtc/packing.cpp
/// @date 2013-08-09 / 2013-08-09
/// @author Christophe Riccio
///////////////////////////////////////////////////////////////////////////////////
#include <glm/glm.hpp>
#include <glm/gtc/packing.hpp>
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#include <cstdio>
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#include <vector>
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void print_bits(glm::half const & s)
{
union
{
glm::detail::hdata h;
unsigned short i;
} uif;
uif.h = s._data();
printf("f16: ");
for(std::size_t j = sizeof(s) * 8; j > 0; --j)
{
if(j == 10 || j == 15)
printf(" ");
printf("%d", (uif.i & (1 << (j - 1))) ? 1 : 0);
}
}
void print_bits(float const & s)
{
union
{
float f;
unsigned int i;
} uif;
uif.f = s;
printf("f32: ");
for(std::size_t j = sizeof(s) * 8; j > 0; --j)
{
if(j == 23 || j == 31)
printf(" ");
printf("%d", (uif.i & (1 << (j - 1))) ? 1 : 0);
}
}
void print_10bits(glm::uint const & s)
{
printf("10b: ");
for(std::size_t j = 10; j > 0; --j)
{
if(j == 5)
printf(" ");
printf("%d", (s & (1 << (j - 1))) ? 1 : 0);
}
}
void print_11bits(glm::uint const & s)
{
printf("11b: ");
for(std::size_t j = 11; j > 0; --j)
{
if(j == 6)
printf(" ");
printf("%d", (s & (1 << (j - 1))) ? 1 : 0);
}
}
void print_value(float const & s)
{
printf("%2.5f, ", s);
print_bits(s);
printf(", ");
print_bits(glm::half(s));
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// printf(", ");
// print_11bits(detail::floatTo11bit(s));
// printf(", ");
// print_10bits(detail::floatTo10bit(s));
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printf("\n");
}
int test_half()
{
int Error = 0;
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print_value(0.0f);
print_value(0.1f);
print_value(0.2f);
print_value(0.3f);
print_value(0.4f);
print_value(0.5f);
print_value(0.6f);
print_value(1.0f);
print_value(1.1f);
print_value(1.2f);
print_value(1.3f);
print_value(1.4f);
print_value(1.5f);
print_value(1.6f);
print_value(2.0f);
print_value(2.1f);
print_value(2.2f);
print_value(2.3f);
print_value(2.4f);
print_value(2.5f);
print_value(2.6f);
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return Error;
}
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int test_Half1x16()
{
int Error = 0;
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std::vector<float> Tests;
Tests.push_back(0.0f);
Tests.push_back(1.0f);
Tests.push_back(-1.0f);
Tests.push_back(2.0f);
Tests.push_back(-2.0f);
Tests.push_back(1.9f);
for(std::size_t i = 0; i < Tests.size(); ++i)
{
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glm::uint32 p0 = glm::packHalf1x16(Tests[i]);
float v0 = glm::unpackHalf1x16(p0);
glm::uint32 p1 = glm::packHalf1x16(v0);
float v1 = glm::unpackHalf1x16(p0);
Error += (v0 == v1) ? 0 : 1;
}
return Error;
}
int test_Half4x16()
{
int Error = 0;
std::vector<glm::vec4> Tests;
Tests.push_back(glm::vec4(1.0));
Tests.push_back(glm::vec4(0.0));
Tests.push_back(glm::vec4(2.0));
Tests.push_back(glm::vec4(0.1));
Tests.push_back(glm::vec4(0.5));
Tests.push_back(glm::vec4(-0.9));
for(std::size_t i = 0; i < Tests.size(); ++i)
{
glm::uint64 p0 = glm::packHalf4x16(Tests[i]);
glm::vec4 v0 = glm::unpackHalf4x16(p0);
glm::uint64 p1 = glm::packHalf4x16(v0);
glm::vec4 v1 = glm::unpackHalf4x16(p0);
Error += glm::all(glm::equal(v0, v1)) ? 0 : 1;
}
return Error;
}
int test_I3x10_1x2()
{
int Error = 0;
std::vector<glm::ivec4> Tests;
Tests.push_back(glm::ivec4(0));
Tests.push_back(glm::ivec4(1));
Tests.push_back(glm::ivec4(-1));
Tests.push_back(glm::ivec4(2));
Tests.push_back(glm::ivec4(-2));
Tests.push_back(glm::ivec4(3));
for(std::size_t i = 0; i < Tests.size(); ++i)
{
glm::uint32 p0 = glm::packI3x10_1x2(Tests[i]);
glm::ivec4 v0 = glm::unpackI3x10_1x2(p0);
glm::uint32 p1 = glm::packI3x10_1x2(v0);
glm::ivec4 v1 = glm::unpackI3x10_1x2(p0);
Error += glm::all(glm::equal(v0, v1)) ? 0 : 1;
}
return Error;
}
int test_U3x10_1x2()
{
int Error = 0;
std::vector<glm::uvec4> Tests;
Tests.push_back(glm::uvec4(0));
Tests.push_back(glm::uvec4(1));
Tests.push_back(glm::uvec4(2));
Tests.push_back(glm::uvec4(3));
Tests.push_back(glm::uvec4(4));
Tests.push_back(glm::uvec4(5));
for(std::size_t i = 0; i < Tests.size(); ++i)
{
glm::uint32 p0 = glm::packU3x10_1x2(Tests[i]);
glm::uvec4 v0 = glm::unpackU3x10_1x2(p0);
glm::uint32 p1 = glm::packU3x10_1x2(v0);
glm::uvec4 v1 = glm::unpackU3x10_1x2(p0);
Error += glm::all(glm::equal(v0, v1)) ? 0 : 1;
}
return Error;
}
int test_Snorm3x10_1x2()
{
int Error = 0;
std::vector<glm::vec4> Tests;
Tests.push_back(glm::vec4(1.0));
Tests.push_back(glm::vec4(0.0));
Tests.push_back(glm::vec4(2.0));
Tests.push_back(glm::vec4(0.1));
Tests.push_back(glm::vec4(0.5));
Tests.push_back(glm::vec4(0.9));
for(std::size_t i = 0; i < Tests.size(); ++i)
{
glm::uint32 p0 = glm::packSnorm3x10_1x2(Tests[i]);
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glm::vec4 v0 = glm::unpackSnorm3x10_1x2(p0);
glm::uint32 p1 = glm::packSnorm3x10_1x2(v0);
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glm::vec4 v1 = glm::unpackSnorm3x10_1x2(p0);
Error += glm::all(glm::equal(v0, v1)) ? 0 : 1;
}
return Error;
}
int test_Unorm3x10_1x2()
{
int Error = 0;
std::vector<glm::vec4> Tests;
Tests.push_back(glm::vec4(1.0));
Tests.push_back(glm::vec4(0.0));
Tests.push_back(glm::vec4(2.0));
Tests.push_back(glm::vec4(0.1));
Tests.push_back(glm::vec4(0.5));
Tests.push_back(glm::vec4(0.9));
for(std::size_t i = 0; i < Tests.size(); ++i)
{
glm::uint32 p0 = glm::packSnorm3x10_1x2(Tests[i]);
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glm::vec4 v0 = glm::unpackSnorm3x10_1x2(p0);
glm::uint32 p1 = glm::packSnorm3x10_1x2(v0);
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glm::vec4 v1 = glm::unpackSnorm3x10_1x2(p0);
Error += glm::all(glm::equal(v0, v1)) ? 0 : 1;
}
return Error;
}
int test_F2x11_1x10()
{
int Error = 0;
std::vector<glm::vec3> Tests;
Tests.push_back(glm::vec3(1.0));
Tests.push_back(glm::vec3(0.0));
Tests.push_back(glm::vec3(2.0));
Tests.push_back(glm::vec3(0.1));
Tests.push_back(glm::vec3(0.5));
Tests.push_back(glm::vec3(0.9));
for(std::size_t i = 0; i < Tests.size(); ++i)
{
glm::uint32 p0 = glm::packF2x11_1x10(Tests[i]);
glm::vec3 v0 = glm::unpackF2x11_1x10(p0);
glm::uint32 p1 = glm::packF2x11_1x10(v0);
glm::vec3 v1 = glm::unpackF2x11_1x10(p0);
Error += glm::all(glm::equal(v0, v1)) ? 0 : 1;
}
return Error;
}
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int main()
{
int Error(0);
Error += test_F2x11_1x10();
Error += test_Snorm3x10_1x2();
Error += test_Unorm3x10_1x2();
Error += test_I3x10_1x2();
Error += test_U3x10_1x2();
Error += test_Half1x16();
Error += test_U3x10_1x2();
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return Error;
}