Method Initialize

GTE/Graphics/GL46/GL46TextureSingle.cpp:30–78

}

void GL46TextureSingle::Initialize()
{
    // Save current binding for this texture target in order to restore it
    // when done because the gl texture object is needed to be bound to this
    // texture target for the operations to follow.
    GLint prevBinding;
    glGetIntegerv(mTargetBinding, &prevBinding);
    glBindTexture(mTarget, mGLHandle);

    // The default is 4-byte alignment.  This allows byte alignment when data
    // from user buffers into textures and vice versa.
    glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
    glPixelStorei(GL_PACK_ALIGNMENT, 1);

    // Set the range of levels.
    glTexParameteri(mTarget, GL_TEXTURE_BASE_LEVEL, 0);
    glTexParameteri(mTarget, GL_TEXTURE_MAX_LEVEL, mNumLevels-1);

    // Initialize with data?
    auto texture = GetTexture();
    if (texture->GetData())
    {
        if (CanAutoGenerateMipmaps())
        {
            // Initialize with the first mipmap level and then generate
            // the remaining mipmaps.
            auto data = texture->GetDataFor(0);
            if (data)
            {
                LoadTextureLevel(0, data);
                GenerateMipmaps();
            }
        }
        else
        {
            // Initialize with each mipmap level.
            for (int32_t level = 0; level < mNumLevels; ++level)
            {
                auto data = texture->GetDataFor(level);
                if (data)
                {
                    LoadTextureLevel(level, data);
                }
            }
        }
    }

    glBindTexture(mTarget, prevBinding);
}

bool GL46TextureSingle::Update()
{