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anbox/external/glm/test/gtc/gtc_packing.cpp
Simon Fels 5070880428 external: import local copy of GLM 0.9.7.2 
This allows building against the same version of GLM across all targets
and not deal with API changes of newer GLM versions which introduce
regressions. Long term we want to migrate away from GLM and stick to a
minimal self-written subset.
2018-05-18 19:37:52 +02:00

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///////////////////////////////////////////////////////////////////////////////////
/// OpenGL Mathematics (glm.g-truc.net)
///
/// Copyright (c) 2005 - 2015 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.
///
/// Restrictions:
/// By making use of the Software for military purposes, you choose to make
/// a Bunny unhappy.
///
/// 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.
///
/// @file test/gtc/gtc_packing.cpp
/// @date 2013-08-09 / 2014-11-25
/// @author Christophe Riccio
///////////////////////////////////////////////////////////////////////////////////
#include <glm/gtc/packing.hpp>
#include <glm/gtc/epsilon.hpp>
#include <cstdio>
#include <vector>
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_11bits(detail::floatTo11bit(s));
// printf(", ");
// print_10bits(detail::floatTo10bit(s));
printf("\n");
}
int test_Half1x16()
{
int Error = 0;
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)
{
glm::uint32 p0 = glm::packHalf1x16(Tests[i]);
float v0 = glm::unpackHalf1x16(p0);
glm::uint32 p1 = glm::packHalf1x16(v0);
float v1 = glm::unpackHalf1x16(p1);
Error += (v0 == v1) ? 0 : 1;
}
return Error;
}
int test_Half4x16()
{
int Error = 0;
std::vector<glm::vec4> Tests;
Tests.push_back(glm::vec4(1.0f));
Tests.push_back(glm::vec4(0.0f));
Tests.push_back(glm::vec4(2.0f));
Tests.push_back(glm::vec4(0.1f));
Tests.push_back(glm::vec4(0.5f));
Tests.push_back(glm::vec4(-0.9f));
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(p1);
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(p1);
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(p1);
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(1.0f));
Tests.push_back(glm::vec4(0.0f));
Tests.push_back(glm::vec4(2.0f));
Tests.push_back(glm::vec4(0.1f));
Tests.push_back(glm::vec4(0.5f));
Tests.push_back(glm::vec4(0.9f));
for(std::size_t i = 0; i < Tests.size(); ++i)
{
glm::uint32 p0 = glm::packSnorm3x10_1x2(Tests[i]);
glm::vec4 v0 = glm::unpackSnorm3x10_1x2(p0);
glm::uint32 p1 = glm::packSnorm3x10_1x2(v0);
glm::vec4 v1 = glm::unpackSnorm3x10_1x2(p1);
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(1.0f));
Tests.push_back(glm::vec4(0.0f));
Tests.push_back(glm::vec4(2.0f));
Tests.push_back(glm::vec4(0.1f));
Tests.push_back(glm::vec4(0.5f));
Tests.push_back(glm::vec4(0.9f));
for(std::size_t i = 0; i < Tests.size(); ++i)
{
glm::uint32 p0 = glm::packUnorm3x10_1x2(Tests[i]);
glm::vec4 v0 = glm::unpackUnorm3x10_1x2(p0);
glm::uint32 p1 = glm::packUnorm3x10_1x2(v0);
glm::vec4 v1 = glm::unpackUnorm3x10_1x2(p1);
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(1.0f));
Tests.push_back(glm::vec3(0.0f));
Tests.push_back(glm::vec3(2.0f));
Tests.push_back(glm::vec3(0.1f));
Tests.push_back(glm::vec3(0.5f));
Tests.push_back(glm::vec3(0.9f));
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(p1);
Error += glm::all(glm::equal(v0, v1)) ? 0 : 1;
}
return Error;
}
int test_packUnorm1x16()
{
int Error = 0;
std::vector<glm::vec1> A;
A.push_back(glm::vec1(1.0f));
A.push_back(glm::vec1(0.5f));
A.push_back(glm::vec1(0.1f));
A.push_back(glm::vec1(0.0f));
for(std::size_t i = 0; i < A.size(); ++i)
{
glm::vec1 B(A[i]);
glm::uint32 C = glm::packUnorm1x16(B.x);
glm::vec1 D(glm::unpackUnorm1x16(C));
Error += glm::all(glm::epsilonEqual(B, D, 1.0f / 65535.f)) ? 0 : 1;
assert(!Error);
}
return Error;
}
int test_packSnorm1x16()
{
int Error = 0;
std::vector<glm::vec1> A;
A.push_back(glm::vec1( 1.0f));
A.push_back(glm::vec1( 0.0f));
A.push_back(glm::vec1(-0.5f));
A.push_back(glm::vec1(-0.1f));
for(std::size_t i = 0; i < A.size(); ++i)
{
glm::vec1 B(A[i]);
glm::uint32 C = glm::packSnorm1x16(B.x);
glm::vec1 D(glm::unpackSnorm1x16(C));
Error += glm::all(glm::epsilonEqual(B, D, 1.0f / 32767.0f * 2.0f)) ? 0 : 1;
}
return Error;
}
int test_packUnorm2x16()
{
int Error = 0;
std::vector<glm::vec2> A;
A.push_back(glm::vec2(1.0f, 0.0f));
A.push_back(glm::vec2(0.5f, 0.7f));
A.push_back(glm::vec2(0.1f, 0.2f));
for(std::size_t i = 0; i < A.size(); ++i)
{
glm::vec2 B(A[i]);
glm::uint32 C = glm::packUnorm2x16(B);
glm::vec2 D = glm::unpackUnorm2x16(C);
Error += glm::all(glm::epsilonEqual(B, D, 1.0f / 65535.f)) ? 0 : 1;
assert(!Error);
}
return Error;
}
int test_packSnorm2x16()
{
int Error = 0;
std::vector<glm::vec2> A;
A.push_back(glm::vec2( 1.0f, 0.0f));
A.push_back(glm::vec2(-0.5f,-0.7f));
A.push_back(glm::vec2(-0.1f, 0.1f));
for(std::size_t i = 0; i < A.size(); ++i)
{
glm::vec2 B(A[i]);
glm::uint32 C = glm::packSnorm2x16(B);
glm::vec2 D = glm::unpackSnorm2x16(C);
Error += glm::all(glm::epsilonEqual(B, D, 1.0f / 32767.0f * 2.0f)) ? 0 : 1;
assert(!Error);
}
return Error;
}
int test_packUnorm4x16()
{
int Error = 0;
std::vector<glm::vec4> A;
A.push_back(glm::vec4(1.0f));
A.push_back(glm::vec4(0.5f));
A.push_back(glm::vec4(0.1f));
A.push_back(glm::vec4(0.0f));
for(std::size_t i = 0; i < A.size(); ++i)
{
glm::vec4 B(A[i]);
glm::uint64 C = glm::packUnorm4x16(B);
glm::vec4 D(glm::unpackUnorm4x16(C));
Error += glm::all(glm::epsilonEqual(B, D, 1.0f / 65535.f)) ? 0 : 1;
assert(!Error);
}
return Error;
}
int test_packSnorm4x16()
{
int Error = 0;
std::vector<glm::vec4> A;
A.push_back(glm::vec4( 1.0f, 0.0f, -0.5f, 0.5f));
A.push_back(glm::vec4(-0.3f,-0.7f, 0.3f, 0.7f));
A.push_back(glm::vec4(-0.1f, 0.1f, -0.2f, 0.2f));
for(std::size_t i = 0; i < A.size(); ++i)
{
glm::vec4 B(A[i]);
glm::uint64 C = glm::packSnorm4x16(B);
glm::vec4 D(glm::unpackSnorm4x16(C));
Error += glm::all(glm::epsilonEqual(B, D, 1.0f / 32767.0f * 2.0f)) ? 0 : 1;
assert(!Error);
}
return Error;
}
int test_packUnorm1x8()
{
int Error = 0;
std::vector<glm::vec1> A;
A.push_back(glm::vec1(1.0f));
A.push_back(glm::vec1(0.5f));
A.push_back(glm::vec1(0.0f));
for(std::size_t i = 0; i < A.size(); ++i)
{
glm::vec1 B(A[i]);
glm::uint8 C = glm::packUnorm1x8(B.x);
glm::vec1 D(glm::unpackUnorm1x8(C));
Error += glm::all(glm::epsilonEqual(B, D, 1.0f / 255.f)) ? 0 : 1;
assert(!Error);
}
return Error;
}
int test_packSnorm1x8()
{
int Error = 0;
std::vector<glm::vec1> A;
A.push_back(glm::vec1( 1.0f));
A.push_back(glm::vec1(-0.7f));
for(std::size_t i = 0; i < A.size(); ++i)
{
glm::vec1 B(A[i]);
glm::uint8 C = glm::packSnorm1x8(B.x);
glm::vec1 D(glm::unpackSnorm1x8(C));
Error += glm::all(glm::epsilonEqual(B, D, 1.0f / 127.f)) ? 0 : 1;
}
return Error;
}
int test_packUnorm2x8()
{
int Error = 0;
std::vector<glm::vec2> A;
A.push_back(glm::vec2(1.0f, 0.7f));
A.push_back(glm::vec2(0.5f, 0.1f));
for(std::size_t i = 0; i < A.size(); ++i)
{
glm::vec2 B(A[i]);
glm::uint16 C = glm::packUnorm2x8(B);
glm::vec2 D = glm::unpackUnorm2x8(C);
Error += glm::all(glm::epsilonEqual(B, D, 1.0f / 255.f)) ? 0 : 1;
assert(!Error);
}
return Error;
}
int test_packSnorm2x8()
{
int Error = 0;
std::vector<glm::vec2> A;
A.push_back(glm::vec2( 1.0f, 0.0f));
A.push_back(glm::vec2(-0.7f,-0.1f));
for(std::size_t i = 0; i < A.size(); ++i)
{
glm::vec2 B(A[i]);
glm::uint16 C = glm::packSnorm2x8(B);
glm::vec2 D = glm::unpackSnorm2x8(C);
Error += glm::all(glm::epsilonEqual(B, D, 1.0f / 127.f)) ? 0 : 1;
}
return Error;
}
int test_packUnorm4x8()
{
int Error = 0;
std::vector<glm::vec4> A;
A.push_back(glm::vec4(1.0f, 0.7f, 0.3f, 0.0f));
A.push_back(glm::vec4(0.5f, 0.1f, 0.2f, 0.3f));
for(std::size_t i = 0; i < A.size(); ++i)
{
glm::vec4 B(A[i]);
glm::uint32 C = glm::packUnorm4x8(B);
glm::vec4 D = glm::unpackUnorm4x8(C);
Error += glm::all(glm::epsilonEqual(B, D, 1.0f / 255.f)) ? 0 : 1;
assert(!Error);
}
return Error;
}
int test_packSnorm4x8()
{
int Error = 0;
std::vector<glm::vec4> A;
A.push_back(glm::vec4( 1.0f, 0.0f,-0.5f,-1.0f));
A.push_back(glm::vec4(-0.7f,-0.1f, 0.1f, 0.7f));
for(std::size_t i = 0; i < A.size(); ++i)
{
glm::vec4 B(A[i]);
glm::uint32 C = glm::packSnorm4x8(B);
glm::vec4 D = glm::unpackSnorm4x8(C);
Error += glm::all(glm::epsilonEqual(B, D, 1.0f / 127.f)) ? 0 : 1;
assert(!Error);
}
return Error;
}
int main()
{
int Error(0);
Error += test_packSnorm1x16();
Error += test_packSnorm2x16();
Error += test_packSnorm4x16();
Error += test_packSnorm1x8();
Error += test_packSnorm2x8();
Error += test_packSnorm4x8();
Error += test_packUnorm1x16();
Error += test_packUnorm2x16();
Error += test_packUnorm4x16();
Error += test_packUnorm1x8();
Error += test_packUnorm2x8();
Error += test_packUnorm4x8();
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();
return Error;
}
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