Texture.cpp

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#include "Texture.hpp"


Texture::Texture(string const & name)
    : m_name(name)
{
    glGenTextures(1, &m_id);

    bind();
    
    ILuint texid; 
    ILboolean success;

    ilGenImages(1, &texid);
    ilBindImage(texid);
    success = ilLoadImage((const ILstring)("content\\textures\\" + name).c_str());
    if (!success)
    {
        cerr << "ERROR: Loading texture '" << name << "' failed (Could not load file)" << endl;     
        exit(EXIT_FAILURE);
    }

    success = ilConvertImage(IL_RGBA, IL_UNSIGNED_BYTE);
    if (!success)
    {
        cerr << "ERROR: Loading texture '" << name << "' failed (Could not convert image data)" << endl;        
        exit(EXIT_FAILURE);
    }

    m_size = uvec2(ilGetInteger(IL_IMAGE_WIDTH),ilGetInteger(IL_IMAGE_HEIGHT));

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
    glTexImage2D(GL_TEXTURE_2D, 0, 
                                GL_RGBA, 
                                m_size.x, 
                                m_size.y,
                                0, 
                                ilGetInteger(IL_IMAGE_FORMAT), 
                                GL_UNSIGNED_BYTE, 
                                ilGetData());
 
    glGenerateMipmap(GL_TEXTURE_2D);

    ilDeleteImages(1, &texid); 
}
Texture::~Texture()
{
    glDeleteTextures(1, &m_id);
}

void Texture::bind(uint target)
{
    glActiveTexture(GL_TEXTURE0 + target);
    glBindTexture(GL_TEXTURE_2D, m_id);
}




Textures::Textures()
{
    ilInit();
}
Textures::~Textures()
{
    ilShutDown();
}
Texture* Textures::get(string const & name)
{
    auto found = m_textures.find(name);

    if (found != m_textures.end())
        return found->second.get();

    auto& entry = m_textures[name];
    entry.reset(new Texture(name));
    return entry.get();
}