OpenGL Image (GLI) is a header only C++ image library for graphics software released under the MIT license.

For more information about GLI, please have a look at the API reference documentation.

This library works perfectly with OpenGL but it also ensures interoperability with other third party libraries and SDK. It is a good candidate for software rendering (raytracing / rasterisation), image processing, physic simulations and any development context that requires a simple and convenient mathematics library.

GLI is written in C++11. It is a platform independent library with no dependence and it supports the following compilers:

• Apple Clang 4.0 and higher
• GCC 4.6 and higher
• Intel C++ Composer XE 2013 and higher
• LLVM 3.2 and higher
• Visual C++ 2012 and higher
• Any conform C++11 compiler

Thanks for contributing to the project by submitting issues for bug reports and feature requests. Any feedback is welcome at gli@g-truc.net.

#include <gli/gli.hpp>
GLuint CreateTextureArray(char const* Filename)
{
	gli::texture2D Texture(gli::load_dds(Filename));
	assert(!Texture.empty());
	gli::gl GL;
	gli::gl::format const Format = GL.translate(Texture.format());
	GLint const MaxLevels = static_cast<GLint>(Texture.levels() - 1);

	GLuint TextureName = 0;
	glGenTextures(1, &TextureName);
	glBindTexture(GL_TEXTURE_2D_ARRAY, TextureName);
	glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_BASE_LEVEL, 0);
	glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MAX_LEVEL, MaxLevels);
	glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_SWIZZLE_R, Format.Swizzle[0]);
	glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_SWIZZLE_G, Format.Swizzle[1]);
	glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_SWIZZLE_B, Format.Swizzle[2]);
	glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_SWIZZLE_A, Format.Swizzle[3]);
	glTexStorage3D(GL_TEXTURE_2D_ARRAY, static_cast<GLint>(Texture.levels()),
		Format.Internal,
		static_cast<GLsizei>(Texture.dimensions().x),
		static_cast<GLsizei>(Texture.dimensions().y),
		static_cast<GLsizei>(1));
	if(gli::is_compressed(Texture.format()))
	{
		for(std::size_t Level = 0; Level < Texture.levels(); ++Level)
		{
			glCompressedTexSubImage3D(GL_TEXTURE_2D_ARRAY, static_cast<GLint>(Level),
				0, 0, 0,
				static_cast<GLsizei>(Texture[Level].dimensions().x),
				static_cast<GLsizei>(Texture[Level].dimensions().y),
				static_cast<GLsizei>(1),
				Format.External,
				static_cast<GLsizei>(Texture[Level].size()),
				Texture[Level].data());
		}
	}
	else
	{
		for(std::size_t Level = 0; Level < Texture.levels(); ++Level)
		{
			glTexSubImage3D(GL_TEXTURE_2D_ARRAY, static_cast<GLint>(Level),
				0, 0, 0,
				static_cast<GLsizei>(Texture[Level].dimensions().x),
				static_cast<GLsizei>(Texture[Level].dimensions().y),
				static_cast<GLsizei>(1),
				Format.External, Format.Type,
				Texture[Level].data());
		}
	}
	return TextureName;
}

Service	System	Compiler	Status
Drone	Linux 64 bits	GCC 4.6.3

• Fixed GCC
• Fixed warnings
• Fixed saved DDS header size on #52

• Updated API documentation
• Fixed link error

• Fixed interface inconsistencies
• Improved clear(), data() and size() performance using caching
• Removed internal dependence to std::fstream
• Added FORMAT_BGRX8_UNORM and FORMAT_BGRX8_SRGB support #48, #43
• Improved FORMAT_RGB8_UNORM loading

• Large refactoring
• Added loading DDS from memory
• Added saving DDS to memory
• Improved DDS coverage for R, RG, RGB and RGBA formats
• Added DDS ASTC, PVRTC, ATC and ETC support
• Added DDS alpha, luminance and alpha luminance support
• Added PVRTC2, ETC2 and EAC formats

• Fixed swizzled RGB channel when reading back a DDS
• Fixed getMask* link error

• Added flip function
• Added level_count function
• Fixed interaction with std::map (#33)
• Added texelFetch and texelWrite functions

• Essencially a rewrite of the library
• Added explicit copies
• Added single memory allocation per texture storage
• Added texture views
• Added texture copies
• Added comparison operators
• Added clear

• Added DDS saving
• Fixed GCC build
• Fixed XCode build

• Large API refactoring
• Performance improvements at loading: 50x in debug and 50% in release build
• Added texture2DArray
• Added textureCube and textureCubeArray
• Added texture3D
• Added texture1D and texture1DArray
• Improved DDS loading support

• Fixed bugs

• Fixed bugs

• Fixed bugs

• Added DDS10 load and store (BC1 - BC7)
• Added extension system
• Added automatic OpenGL texture object creation from file

• Added DDS exporter

• Fixed GCC build

• Added texelWrite function
• Fixed Visual Studio 2010 warnings
• Added readme.txt and copying.txt

• Updated API
• Removed Boost dependency

• Fixed DDS loader
• Added RGB8 to DDS loader
• Added component swizzle operation
• Added 32 bits integer components support
• Fixed texel fetch

• Added TGA loader
• Added DDS loader
• Added duplicate, crop, partial copy
• Added mipmaps generation.