text: ///////////////////////////////////////////////////////////////////////////////////
  /// OpenGL Image (gli.g-truc.net)
  ///
  /// Copyright (c) 2008 - 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 core
  /// @file test/core/texture_3d.cpp
  /// @date 2013-01-13 / 2013-01-13
  /// @author Christophe Riccio
  ///////////////////////////////////////////////////////////////////////////////////
  
  #include <gli/gli.hpp>
  
  int test_alloc()
  {
  	int Error(0);
  
  	std::vector<gli::format> Formats;
  	Formats.push_back(gli::RGBA8_UNORM);
  	Formats.push_back(gli::RGB8_UNORM);
  	Formats.push_back(gli::R8_SNORM);
  	Formats.push_back(gli::RGB_DXT1);
  	Formats.push_back(gli::RGB_BP_UNORM);
  	Formats.push_back(gli::RGBA32F);
  
  	std::vector<gli::texture3D::dim_type::value_type> Sizes;
  	Sizes.push_back(16);
  	Sizes.push_back(32);
  	Sizes.push_back(15);
  	Sizes.push_back(17);
  	Sizes.push_back(1);
  
  	for(std::size_t FormatIndex = 0; FormatIndex < Formats.size(); ++FormatIndex)
  	for(std::size_t SizeIndex = 0; SizeIndex < Sizes.size(); ++SizeIndex)
  	{
  		gli::texture3D::dim_type Size(Sizes[SizeIndex]);
  
  		gli::texture3D TextureA(gli::levels(Size), Formats[FormatIndex], Size);
  		gli::texture3D TextureB(Formats[FormatIndex], Size);
  
  		Error += TextureA == TextureB ? 0 : 1;
  	}
  
  	return Error;
  }
  
  int test_texture3d_clear()
  {
  	int Error(0);
  
  	glm::u8vec4 const Orange(255, 127, 0, 255);
  
  	gli::texture3D::dim_type Size(16);
  
  	gli::texture3D Texture(gli::levels(Size), gli::RGBA8U, Size);
  
  	Texture.clear<glm::u8vec4>(Orange);
  
  	return Error;
  }
  
  int test_texture3d_query()
  {
  	int Error(0);
  
  	gli::texture3D::dim_type Size(2);
  
  	gli::texture3D Texture(gli::levels(Size), gli::RGBA8U, Size);
  
  	Error += Texture.size() == sizeof(glm::u8vec4) * 9 ? 0 : 1;
  	Error += Texture.format() == gli::RGBA8U ? 0 : 1;
  	Error += Texture.levels() == 2 ? 0 : 1;
  	Error += !Texture.empty() ? 0 : 1;
  	Error += Texture.dimensions().x == 2 ? 0 : 1;
  	Error += Texture.dimensions().y == 2 ? 0 : 1;
  	Error += Texture.dimensions().z == 2 ? 0 : 1;
  
  	return Error;
  }
  
  int test_texture3d_access()
  {
  	int Error(0);
  
  	{
  		glm::u8vec4 const Orange(255, 127, 0, 255);
  
  		gli::image Image(gli::RGBA8U, gli::image::dim_type(2));
  
  		gli::texture3D Texture(gli::texture3D::size_type(1), gli::RGBA8U, gli::texture3D::dim_type(2));
  
  		Error += Image.size() == Texture.size() ? 0 : 1;
  	}
  
  	{
  		gli::texture3D Texture(
  			gli::texture3D::size_type(2),
  			gli::RGBA8U,
  			gli::texture3D::dim_type(2));
  		assert(!Texture.empty());
  
  		gli::image Image0 = Texture[0];
  		gli::image Image1 = Texture[1];
  		
  		std::size_t Size0 = Image0.size();
  		std::size_t Size1 = Image1.size();
  
  		Error += Size0 == sizeof(glm::u8vec4) * 8 ? 0 : 1;
  		Error += Size1 == sizeof(glm::u8vec4) * 1 ? 0 : 1;
  
  		*Image0.data<glm::u8vec4>() = glm::u8vec4(255, 127, 0, 255);
  		*Image1.data<glm::u8vec4>() = glm::u8vec4(0, 127, 255, 255);
  
  		glm::u8vec4 * PointerA = Image0.data<glm::u8vec4>();
  		glm::u8vec4 * PointerB = Image1.data<glm::u8vec4>();
  
  		glm::u8vec4 * Pointer0 = Texture.data<glm::u8vec4>() + 0;
  		glm::u8vec4 * Pointer1 = Texture.data<glm::u8vec4>() + 8;
  
  		Error += PointerA == Pointer0 ? 0 : 1;
  		Error += PointerB == Pointer1 ? 0 : 1;
  
  		glm::u8vec4 ColorA = *Image0.data<glm::u8vec4>();
  		glm::u8vec4 ColorB = *Image1.data<glm::u8vec4>();
  
  		glm::u8vec4 Color0 = *Pointer0;
  		glm::u8vec4 Color1 = *Pointer1;
  
  		Error += glm::all(glm::equal(Color0, glm::u8vec4(255, 127, 0, 255))) ? 0 : 1;
  		Error += glm::all(glm::equal(Color1, glm::u8vec4(0, 127, 255, 255))) ? 0 : 1;
  	}
  
  	return Error;
  }
  
  struct test
  {
  	test(
  		gli::format const & Format,
  		gli::texture3D::dim_type const & Dimensions,
  		gli::texture3D::size_type const & Size) :
  		Format(Format),
  		Dimensions(Dimensions),
  		Size(Size)
  	{}
  
  	gli::format Format;
  	gli::texture3D::dim_type Dimensions;
  	gli::texture3D::size_type Size;
  };
  
  int test_texture3d_size()
  {
  	int Error(0);
  
  	std::vector<test> Tests;
  	Tests.push_back(test(gli::RGBA8U, gli::texture3D::dim_type(4), 256));
  	Tests.push_back(test(gli::R8U, gli::texture3D::dim_type(4), 64));
  	Tests.push_back(test(gli::RGBA_DXT1, gli::texture3D::dim_type(4), 32));
  	Tests.push_back(test(gli::RGBA_DXT1, gli::texture3D::dim_type(2), 32));
  	Tests.push_back(test(gli::RGBA_DXT1, gli::texture3D::dim_type(1), 32));
  	Tests.push_back(test(gli::RGBA_DXT5, gli::texture3D::dim_type(4), 64));
  
  	for(std::size_t i = 0; i < Tests.size(); ++i)
  	{
  		gli::texture3D Texture(
  			gli::texture3D::size_type(1),
  			Tests[i].Format,
  			gli::texture3D::dim_type(4));
  
  		Error += Texture.size() == Tests[i].Size ? 0 : 1;
  		assert(!Error);
  	}
  
  	for(std::size_t i = 0; i < Tests.size(); ++i)
  	{
  		gli::texture3D Texture(
  			gli::texture3D::size_type(1),
  			Tests[i].Format,
  			gli::texture3D::dim_type(4));
  
  		gli::image Image = Texture[0];
  
  		Error += Image.size() == Tests[i].Size ? 0 : 1;
  		assert(!Error);
  	}
  
  	return Error;
  }
  
  int main()
  {
  	int Error(0);
  
  	Error += test_alloc();
  	Error += test_texture3d_size();
  	Error += test_texture3d_query();
  	Error += test_texture3d_clear();
  	Error += test_texture3d_access();
  
  	return Error;
  }
  
  