Texture ID Accessor

[lolz123]

Hello,

I cannot seem to find the getTextureID function in the latest version of SFML anymore. Not having this function makes it rather difficult to use SFML with OpenGL. Why not have such an accessor?

[eXpl0it3r]

I'm not an expert on the whole OpenGL/SFML thingy, but can't you just use the bind() function?
Also you might want to give a clear example, why it's needed.

[Laurent]

"anymore"? It has never existed.

The texture ID is almost never necessary, you access the texture properties by binding it (which you can do the bind function) and then calling texture-related functions.

There are also a few threads on this subject, you can do a forum search.

[lolz123]

I thought there was one, I wasn't sure anymore though  . Sorry about that!

What if I wanted to use SFML textures as attachments for a framebuffer object? It would be nice if I could use SFML textures for that

Also, writing generic OpenGL code and then trying to integrate it with SFML can become more difficult, since you can't feed functions textureIDs anymore.

In addition, being able to get the texture ID makes it easier to find the texture in debugging programs such as gDEBugger.

I just don't see why the function shouldn't exist!

[Laurent]

You have valid points.

[lolz123]

So, will this feature be available in future versions? It would be much appreciated!

[Laurent]

Maybe

[Tank]

I'd need it too, so I can remove this workaround:

sf::Texture::bind( &grass_texture );
glGetIntegerv( GL_TEXTURE_BINDING_2D, &grass_texture_id );

[Laurent]

What do you do with the ID?

[Tank]

I need the ID for a sampler2D uniform variable in a shader. I use sf::Texture for pure convenience, as it would be perfectly possible to generate the texture myself and load it with sf::Image::getPixelsPtr(). However that also means I can't reuse it with SFML's drawables anymore.

[Laurent]

Why don't you use Shader::setParameter(Texture&)?

[Tank]

Because I don't use SFML for shaders.

[Laurent]

Why?

[lolz123]

While we are at it, I will also propose a method to get the ID for a shader program .

Unfortunately, the lack of these functions is a reason I still use SDL for 3D  . I need these functions for shaders as well. IDK about Tank, but I use my own shader system because SFML doesn't allow you to arbitrarily link uniforms to binding ports, it doesn't have near enough uniform types (especially matrices), and you cannot use UBO's with it (since you cannot get the program ID).

[Laurent]

Look at Tank's code, the workaround is just 2 lines of code... so don't say that your completely blocked because of it