I'm trying to render a font and the texture atlas is created as a single channel texture, that is treated as alpha (black is transparent, white is opaque).I can correctly render the text as a sprite loading the texture with:glTexImage2D (GL_TEXTURE_2D, 0, GL_ALPHA, width, height, 0, GL_ALPHA, GL_UNSIGNED_BYTE, data);But changing the color as I do with any other sprint is not working, the text is always black (as expected for a colorless opaque