void TextureInstance::bind_texture(const TextureContainer& textures)
{
if (m_texture == 0)
{
m_texture = textures.get_by_name(impl->m_texture_name.c_str());
// We need to resolve the alpha mode as soon as a texture is bound to this instance.
// We cannot do it in on_frame_begin() because the texture instance might be needed
// before it gets called. For instance, updating the trace context implies updating
// the intersection filters, and those need to be able to sample texture instances.
if (m_effective_alpha_mode == TextureAlphaModeDetect)
{
m_effective_alpha_mode = detect_alpha_mode(*m_texture);
RENDERER_LOG_DEBUG(
"texture instance \"%s\" was detected to use the \"%s\" alpha mode.",
get_name(),
m_effective_alpha_mode == TextureAlphaModeAlphaChannel ? "alpha_channel" : "luminance");
}
}
}
