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Added packF11F11F10 implementation

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master
Christophe Riccio ago%!(EXTRA string=12 years)
parent e3e88f05a6
commit cf14790806
4 changed files with 261 additions and 2 deletions
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  1. 4
      glm/gtc/packing.hpp
  2. 116
      glm/gtc/packing.inl
  3. 1
      test/gtc/CMakeLists.txt
  4. 142
      test/gtc/gtc_packing.cpp

4
glm/gtc/packing.hpp
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@ -100,8 +100,8 @@ namespace glm
GLM_FUNC_DECL uint32 packI3x10I1x2(ivec4 const & v);
GLM_FUNC_DECL ivec4 unpackI3x10I1x2(uint32 const & v);
GLM_FUNC_DECL uint32 packU3x10U1x2(uvec4 const & v);
GLM_FUNC_DECL uvec4 unpackU3x10U1x2(uint32 const & v);
GLM_FUNC_DECL uint32 packU10U10U10U2(uvec4 const & v);
GLM_FUNC_DECL uvec4 unpackU10U10U10U2(uint32 const & v);
GLM_FUNC_DECL uint32 packF11F11F10(vec3 const & v);
GLM_FUNC_DECL vec3 unpackF11F11F10(uint32 const & v);

116
glm/gtc/packing.inl
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@ -28,5 +28,121 @@
namespace glm
{
namespace detail
{
glm::uint16 float2half(glm::uint32 const & f)
{
// 10 bits => EE EEEFFFFF
// 11 bits => EEE EEFFFFFF
// Half bits => SEEEEEFF FFFFFFFF
// Float bits => SEEEEEEE EFFFFFFF FFFFFFFF FFFFFFFF
// 0x00007c00 => 00000000 00000000 01111100 00000000
// 0x000003ff => 00000000 00000000 00000011 11111111
// 0x38000000 => 00111000 00000000 00000000 00000000
// 0x7f800000 => 01111111 10000000 00000000 00000000
// 0x00008000 => 00000000 00000000 10000000 00000000
return
((f >> 16) & 0x8000) | // sign
((((f & 0x7f800000) - 0x38000000) >> 13) & 0x7c00) | // exponential
((f >> 13) & 0x03ff); // Mantissa
}
glm::uint16 float2packed11(glm::uint32 const & f)
{
// 10 bits => EE EEEFFFFF
// 11 bits => EEE EEFFFFFF
// Half bits => SEEEEEFF FFFFFFFF
// Float bits => SEEEEEEE EFFFFFFF FFFFFFFF FFFFFFFF
// 0x000007c0 => 00000000 00000000 00000111 11000000
// 0x00007c00 => 00000000 00000000 01111100 00000000
// 0x000003ff => 00000000 00000000 00000011 11111111
// 0x38000000 => 00111000 00000000 00000000 00000000
// 0x7f800000 => 01111111 10000000 00000000 00000000
// 0x00008000 => 00000000 00000000 10000000 00000000
return
((((f & 0x7f800000) - 0x38000000) >> 17) & 0x07c0) | // exponential
((f >> 17) & 0x003f); // Mantissa
}
glm::uint float2packed10(glm::uint const & f)
{
// 10 bits => EE EEEFFFFF
// 11 bits => EEE EEFFFFFF
// Half bits => SEEEEEFF FFFFFFFF
// Float bits => SEEEEEEE EFFFFFFF FFFFFFFF FFFFFFFF
// 0x0000001F => 00000000 00000000 00000000 00011111
// 0x0000003F => 00000000 00000000 00000000 00111111
// 0x000003E0 => 00000000 00000000 00000011 11100000
// 0x000007C0 => 00000000 00000000 00000111 11000000
// 0x00007C00 => 00000000 00000000 01111100 00000000
// 0x000003FF => 00000000 00000000 00000011 11111111
// 0x38000000 => 00111000 00000000 00000000 00000000
// 0x7f800000 => 01111111 10000000 00000000 00000000
// 0x00008000 => 00000000 00000000 10000000 00000000
return
((((f & 0x7f800000) - 0x38000000) >> 18) & 0x03E0) | // exponential
((f >> 18) & 0x001f); // Mantissa
}
glm::uint half2float(glm::uint const & h)
{
return ((h & 0x8000) << 16) | ((( h & 0x7c00) + 0x1C000) << 13) | ((h & 0x03FF) << 13);
}
union uif
{
glm::uint i;
float f;
};
glm::uint floatTo11bit(float x)
{
if(x == 0.0f)
return 0;
else if(glm::isnan(x))
return ~0;
else if(glm::isinf(x))
return 0x1f << 6;
uif Union;
Union.f = x;
return float2packed11(Union.i);
}
glm::uint floatTo10bit(float x)
{
if(x == 0.0f)
return 0;
else if(glm::isnan(x))
return ~0;
else if(glm::isinf(x))
return 0x1f << 5;
uif Union;
Union.f = x;
return float2packed10(Union.i);
}
glm::uint f11_f11_f10(float x, float y, float z)
{
return ((floatTo11bit(x) & ((1 << 11) - 1)) << 0) | ((floatTo11bit(y) & ((1 << 11) - 1)) << 11) | ((floatTo10bit(z) & ((1 << 10) - 1)) << 22);
}
}//namespace detail
GLM_FUNC_QUALIFIER uint32 packF11F11F10(vec3 const & v)
{
return
((detail::floatTo11bit(v.x) & ((1 << 11) - 1)) << 0) |
((detail::floatTo11bit(v.y) & ((1 << 11) - 1)) << 11) |
((detail::floatTo10bit(v.z) & ((1 << 10) - 1)) << 22);
}
GLM_FUNC_QUALIFIER vec3 unpackF11F11F10(uint32 const & v)
{
}
}//namespace glm

1
test/gtc/CMakeLists.txt
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@ -6,6 +6,7 @@ glmCreateTestGTC(gtc_matrix_integer)
glmCreateTestGTC(gtc_matrix_inverse)
glmCreateTestGTC(gtc_matrix_transform)
glmCreateTestGTC(gtc_noise)
glmCreateTestGTC(gtc_packing)
glmCreateTestGTC(gtc_quaternion)
glmCreateTestGTC(gtc_random)
glmCreateTestGTC(gtc_reciprocal)

142
test/gtc/gtc_packing.cpp
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@ -0,0 +1,142 @@
///////////////////////////////////////////////////////////////////////////////////
/// 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>
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));
printf(", ");
print_11bits(detail::floatTo11bit(s));
printf(", ");
print_10bits(detail::floatTo10bit(s));
printf("\n");
}
int test_half()
{
int Error = 0;
print_value(0.0);
print_value(0.1);
print_value(0.2);
print_value(0.3);
print_value(0.4);
print_value(0.5);
print_value(0.6);
print_value(1.0);
print_value(1.1);
print_value(1.2);
print_value(1.3);
print_value(1.4);
print_value(1.5);
print_value(1.6);
print_value(2.0);
print_value(2.1);
print_value(2.2);
print_value(2.3);
print_value(2.4);
print_value(2.5);
print_value(2.6);
return Error;
}
int main()
{
int Error(0);
Error += test_half();
return Error;
}
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