// bindTextureToUnit will bind a texture to a texture unit. If restorprev is true
// it will enable the current texture unit after completing
func bindTextureToUnit(texture gl.Texture, textureunit int, restoreprev bool) error {
if texture != gl_state.boundTextures[textureunit] {
oldtextureunit := gl_state.curTextureUnit
if err := setTextureUnit(textureunit); err != nil {
return err
}
gl_state.boundTextures[textureunit] = texture
gl.BindTexture(gl.TEXTURE_2D, gl_state.boundTextures[textureunit])
if restoreprev {
return setTextureUnit(oldtextureunit)
}
}
return nil
}
// bindTexture will bind a texture to the current context if it isnt already bound
func bindTexture(texture gl.Texture) {
if texture != gl_state.boundTextures[gl_state.curTextureUnit] {
gl_state.boundTextures[gl_state.curTextureUnit] = texture
gl.BindTexture(gl.TEXTURE_2D, texture)
}
}