Custom blend modes

[Qix]

we use this for some time and no problems

Sure it works. It's just an extra OpenGL state to handle. I was talking about design issues.

If it goes into sf::RenderStates, why not make the blend mode setting a part of the Texture member?

[Acrobat]

we use this for some time and no problems

Sure it works. It's just an extra OpenGL state to handle. I was talking about design issues.

If it goes into sf::RenderStates, why not make the blend mode setting a part of the Texture member?

because that is bad design.
same texture can be reused a lot, with different settings.

[Laurent]

If it goes into sf::RenderStates, why not make the blend mode setting a part of the Texture member?

And my concern is that this new mode is not a blend mode.

[Qix]

Well if they're looking for a tint, then add that in there as well. A color transform class or something that is relevant to the texture.

[Foaly]

So you're not totally against the idea, you just can't think of a good design to implement it right now?
What about the subtractive blend mode? This could be added Very easily. The use case I need it for is for fading out a entire render texture (alphablending and multiply leave artefacts due to float rounding errors) but there is other use cases to, like darkening things or creating worms like 2D destructible terrain with only render textures (no expensive copying) these are only a couple things I can think of right now. I certain there is more.

[Laurent]

So you're not totally against the idea, you just can't think of a good design to implement it right now?

Yes. But it doesn't mean that I will add it if we find a good design

The use case I need it for is for fading out a entire render texture (alphablending and multiply leave artefacts due to float rounding errors) but there is other use cases to, like darkening things or creating worms like 2D destructible terrain with only render textures (no expensive copying) these are only a couple things I can think of right now.

Seems like these effects could be achieved with what already exists...