GLM GLI
0.8.0 0.7.0 0.6.1 0.6.0
Download GLI 0.5.0.0
2013-11-24

G-Truc Creation

Code samples

Create GLI texture views and copies:
  • #include <gli/gli.hpp>
  • gli::texture2DArray TextureArray(gli::load_dds("texture.dds"));
  • gli::texture2DArray TextureViewA(TextureArray,
  • TextureArray.baseLayer(), TextureArray.maxLayer(),
  • TextureArray.baseLevel() + 1, TextureArray.maxLevel());
  • gli::texture2D TextureViewB(TextureArray,
  • TextureArray.baseLayer(),
  • TextureArray.baseLevel(), TextureArray.maxLevel());
  • // Equivalent to the contructor usage
  • gli::texture2D TextureViewC(gli::view(TextureArray,
  • TextureArray.baseLayer(),
  • TextureArray.baseLevel(), TextureArray.maxLevel());
  • // Allocate a new storage matching the memory size accessible by TextureViewC
  • gli::texture2D TextureCopyC(gli::copy(TextureViewC);
  • gli::texture2DArray TextureCopyA(gli::copy(TextureArray,
  • TextureArray.baseLayer(), TextureArray.maxLayer(),
  • TextureArray.baseLevel() + 1, TextureArray.maxLevel());
Loading an OpenGL texture:
  • #include <gli/gli.hpp>
  • gli::storage Storage(gli::load_dds("texture.dds"));
  • assert(!Storage.empty())
  • GLenum Target = Storage.layers() > 1 ? GL_TEXTURE_2D_ARRAY : GL_TEXTURE_2D;
  • glGenTextures(1, &TextureName);
  • glBindTexture(Target, TextureName);
  • glTexParameteri(Target, GL_TEXTURE_BASE_LEVEL, 0);
  • glTexParameteri(Target, GL_TEXTURE_MAX_LEVEL, static_cast<GLint>(Texture.levels() - 1));
  • glTexParameteri(Target, GL_TEXTURE_MIN_FILTER, Texture.levels() > 1 ? GL_LINEAR_MIPMAP_LINEAR : GL_LINEAR);
  • glTexParameteri(Target, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
  • if(Storage.layers() > 1)
  • {
  • gli::texture2DArray Texture(Storage);
  • glTexStorage3D(Target, static_cast<GLint>(Texture.levels()),
  • static_cast<GLenum>(gli::internal_format(Texture.format())),
  • static_cast<GLsizei>(Texture.dimensions().x),
  • static_cast<GLsizei>(Texture.dimensions().y),
  • static_cast<GLsizei>(Texture.layers()));
  • if(gli::is_compressed(Texture.format()))
  • {
  • for(gli::texture2DArray::size_type Layer = 0; Layer < Texture.layers(); ++Layer)
  • for(gli::texture2DArray::size_type Level = 0; Level < Texture.levels(); ++Level)
  • {
  • glCompressedTexSubImage3D(Target,
  • static_cast<GLint>(Level),
  • 0, 0, static_cast<GLint>(Layer),
  • static_cast<GLsizei>(Texture[Layer][Level].dimensions().x),
  • static_cast<GLsizei>(Texture[Layer][Level].dimensions().y),
  • static_cast<GLsizei>(1),
  • static_cast<GLenum>(gli::external_format(Texture.format())),
  • static_cast<GLsizei>(Texture[Layer][Level].size()),
  • Texture[Layer][Level].data());
  • }
  • }
  • else
  • {
  • for(gli::texture2DArray::size_type Layer = 0; Layer < Texture.layers(); ++Layer)
  • for(gli::texture2DArray::size_type Level = 0; Level < Texture.levels(); ++Level)
  • {
  • glTexSubImage3D(Target,
  • static_cast<GLint>(Level),
  • 0, 0, static_cast<GLint>(Layer),
  • static_cast<GLsizei>(Texture[Layer][Level].dimensions().x),
  • static_cast<GLsizei>(Texture[Layer][Level].dimensions().y),
  • static_cast<GLsizei>(1),
  • static_cast<GLenum>(gli::external_format(Texture.format())),
  • static_cast<GLenum>(gli::type_format(Texture.format())),
  • Texture[Layer][Level].data());
  • }
  • }
  • }
  • else
  • {
  • gli::texture2D Texture(Storage);
  • glTexStorage2D(Target, static_cast<GLint>(Texture.levels()),
  • static_cast<GLenum>(gli::internal_format(Texture.format())),
  • static_cast<GLsizei>(Texture.dimensions().x), static_cast<GLsizei>(Texture.dimensions().y));
  • if(gli::is_compressed(Texture.format()))
  • {
  • for(gli::texture2D::size_type Level = 0; Level < Texture.levels(); ++Level)
  • {
  • glCompressedTexSubImage2D(Target,
  • static_cast<GLint>(Level), 0, 0,
  • static_cast<GLsizei>(Texture[Level].dimensions().x),
  • static_cast<GLsizei>(Texture[Level].dimensions().y),
  • static_cast<GLenum>(gli::external_format(Texture.format())),
  • static_cast<GLsizei>(Texture[Level].size()),
  • Texture[Level].data());
  • }
  • }
  • else
  • {
  • for(gli::texture2D::size_type Level = 0; Level < Texture.levels(); ++Level)
  • {
  • glTexSubImage2D(Target,
  • static_cast<GLint>(Level), 0, 0,
  • static_cast<GLsizei>(Texture[Level].dimensions().x),
  • static_cast<GLsizei>(Texture[Level].dimensions().y),
  • static_cast<GLenum>(gli::external_format(Texture.format())),
  • static_cast<GLenum>(gli::type_format(Texture.format())),
  • Texture[Level].data());
  • }
  • }
  • }
Create a texture with GLI 0.5 and save it to a DDS file:
  • #include <glm/glm.hpp>
  • #include <gli/gli.hpp>
  • // Allocated a 32 bits texture with one mipmap level
  • gli::texture2D Texture(3, gli::RGBA8_UNORM, gli::texture2D::dimensions_type(256, 256));
  • Texture[0].clear(glm::u8vec4(255, 0, 0, 255)));
  • Texture[1].clear(glm::u8vec4(255, 128, 0, 255)));
  • Texture[2].clear(glm::u8vec4(255, 255, 0, 255)));
  • glm::u8vec4 * LinearAddress0 = Texture[0].data<glm::u8vec4>();
  • glm::u8vec4 * LinearAddress1 = Texture[1].data<glm::u8vec4>();
  • glm::u8vec4 * LinearAddress2 = Texture[2].data<glm::u8vec4>();
  • ...
  • // Do something
  • ...
  • gli::save_dds(Texture, "texture.dds");