private boolean initTexture(GL3 gl3) {

    try {
      jgli.Texture2d texture = new Texture2d(jgli.Load.load(TEXTURE_ROOT + "/" + TEXTURE_DIFFUSE));
      jgli.Gl.Format format = jgli.Gl.translate(texture.format());
      jgli.Gl.Swizzles swizzles = jgli.Gl.translate(texture.swizzles());

      gl3.glGenTextures(1, textureName);

      gl3.glActiveTexture(GL_TEXTURE0);
      gl3.glBindTexture(GL_TEXTURE_2D, textureName.get(0));
      gl3.glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_SWIZZLE_R, swizzles.r.value);
      gl3.glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_SWIZZLE_G, swizzles.g.value);
      gl3.glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_SWIZZLE_B, swizzles.b.value);
      gl3.glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_SWIZZLE_A, swizzles.a.value);

      for (int level = 0; level < texture.levels(); ++level) {
        gl3.glTexImage2D(
            GL_TEXTURE_2D,
            level,
            format.internal.value,
            texture.dimensions(level)[0],
            texture.dimensions(level)[1],
            0,
            format.external.value,
            format.type.value,
            texture.data(level));
      }

    } catch (IOException ex) {
      Logger.getLogger(Gl_330_blend_index.class.getName()).log(Level.SEVERE, null, ex);
    }
    return checkError(gl3, "initTexture");
  }
  private boolean initTexture(GL4 gl4) {

    try {
      jgli.Texture2d texture = new Texture2d(jgli.Load.load(TEXTURE_ROOT + "/" + TEXTURE_DIFFUSE));
      jgli.Gl.Format format = jgli.Gl.translate(texture.format());

      gl4.glPixelStorei(GL_UNPACK_ALIGNMENT, 1);

      gl4.glGenTextures(1, textureName);
      gl4.glActiveTexture(GL_TEXTURE0);
      gl4.glBindTexture(GL_TEXTURE_2D_ARRAY, textureName.get(0));
      gl4.glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_SWIZZLE_R, GL_RED);
      gl4.glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_SWIZZLE_G, GL_GREEN);
      gl4.glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_SWIZZLE_B, GL_BLUE);
      gl4.glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_SWIZZLE_A, GL_ALPHA);
      gl4.glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_BASE_LEVEL, 0);
      gl4.glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MAX_LEVEL, texture.levels() - 1);
      gl4.glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
      gl4.glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MAG_FILTER, GL_LINEAR);

      gl4.glTexStorage3D(
          GL_TEXTURE_2D_ARRAY,
          texture.levels(),
          format.internal.value,
          texture.dimensions(0)[0],
          texture.dimensions(0)[1],
          1);

      for (int level = 0; level < texture.levels(); ++level) {

        gl4.glTexSubImage3D(
            GL_TEXTURE_2D_ARRAY,
            level,
            0,
            0,
            0,
            texture.dimensions(level)[0],
            texture.dimensions(level)[1],
            1,
            format.external.value,
            format.type.value,
            texture.data(level));
      }

      gl4.glPixelStorei(GL_UNPACK_ALIGNMENT, 4);

    } catch (IOException ex) {
      Logger.getLogger(Gl_430_texture_storage.class.getName()).log(Level.SEVERE, null, ex);
    }
    return true;
  }
  private boolean initTexture(GL3 gl3) {

    try {
      jgli.Texture2d texture = new Texture2d(jgli.Load.load(TEXTURE_ROOT + "/" + TEXTURE_DIFFUSE));
      assert (!texture.empty());

      gl3.glPixelStorei(GL_UNPACK_ALIGNMENT, 1);

      gl3.glGenTextures(1, textureName);

      gl3.glActiveTexture(GL_TEXTURE0);
      gl3.glBindTexture(GL_TEXTURE_2D, textureName.get(0));
      gl3.glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 0);
      gl3.glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, texture.levels() - 1);
      gl3.glTexParameteri(
          GL_TEXTURE_2D,
          GL_TEXTURE_MIN_FILTER,
          texture.levels() == 1 ? GL_NEAREST : GL_NEAREST_MIPMAP_NEAREST);
      gl3.glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
      gl3.glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
      gl3.glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
      gl3.glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_LOD, -1000.f);
      gl3.glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAX_LOD, 1000.f);
      gl3.glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_LOD_BIAS, 0.0f);

      jgli.Gl.Format format = jgli.Gl.translate(texture.format());
      for (int level = 0; level < texture.levels(); ++level) {
        gl3.glTexImage2D(
            GL_TEXTURE_2D,
            level,
            format.internal.value,
            texture.dimensions(level)[0],
            texture.dimensions(level)[1],
            0,
            format.external.value,
            format.type.value,
            texture.data(level));
      }

      if (texture.levels() == 1) {
        gl3.glGenerateMipmap(GL_TEXTURE_2D);
      }

      gl3.glPixelStorei(GL_UNPACK_ALIGNMENT, 4);

    } catch (IOException ex) {
      Logger.getLogger(Gl_320_texture_2d.class.getName()).log(Level.SEVERE, null, ex);
    }
    return true;
  }
  private boolean initTexture(GL3 gl3) {

    IntBuffer textureSize = GLBuffers.newDirectIntBuffer(1);

    try {
      gl3.glPixelStorei(GL_UNPACK_ALIGNMENT, 4);

      gl3.glGetIntegerv(GL_MAX_RECTANGLE_TEXTURE_SIZE, textureSize);

      gl3.glGenTextures(1, textureRectName);

      gl3.glActiveTexture(GL_TEXTURE0);
      gl3.glBindTexture(GL_TEXTURE_RECTANGLE, textureRectName.get(0));
      gl3.glTexParameteri(GL_TEXTURE_RECTANGLE, GL_TEXTURE_BASE_LEVEL, 0);
      gl3.glTexParameteri(GL_TEXTURE_RECTANGLE, GL_TEXTURE_MAX_LEVEL, 0);
      gl3.glTexParameteri(GL_TEXTURE_RECTANGLE, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
      gl3.glTexParameteri(GL_TEXTURE_RECTANGLE, GL_TEXTURE_MAG_FILTER, GL_LINEAR);

      jgli.Texture2d texture = new Texture2d(jgli.Load.load(TEXTURE_ROOT + "/" + TEXTURE_DIFFUSE));
      jgli.Gl.Format format = jgli.Gl.translate(texture.format());

      assert (texture.dimensions()[0] <= textureSize.get(0)
          && texture.dimensions()[1] <= textureSize.get(0));

      gl3.glTexImage2D(
          GL_TEXTURE_RECTANGLE,
          0,
          format.internal.value,
          texture.dimensions()[0],
          texture.dimensions()[1],
          0,
          format.external.value,
          format.type.value,
          texture.data());

      gl3.glPixelStorei(GL_UNPACK_ALIGNMENT, 1);

    } catch (IOException ex) {
      Logger.getLogger(Gl_330_texture_rect.class.getName()).log(Level.SEVERE, null, ex);
    }

    BufferUtils.destroyDirectBuffer(textureSize);

    return true;
  }