Add support for floating point textures to OpenGL

Created by: AmnonOwed

I'm packing data in a texture (PImage) to send to a fragment shader. I'm running into the limitations of the 32bit RGBA format that seems to be the default for every texture in Processing. It's causing banding effects in my output. Switching to floating point textures will most likely solve these problems, because of the increased accuracy.

I have searched high and low (all the forums, the source code, the issue list), but I cannot find a way to use floating points textures in Processing. Is this possible? If not, I would like to post this issue as a feature request.

Commencez par retracer la manière dont les textures PImage de Processing sont créées et transmises aux fragment shaders via son chemin OpenGL. Déterminez quels formats de textures à virgule flottante et quelles contraintes matérielles prises en charge doivent être couverts. Le travail sera considéré comme terminé lorsqu'il existera une méthode documentée et testée permettant d'utiliser des textures à virgule flottante sans la limitation actuelle de 32-bit RGBA.