Question

I’m doing some GPGPU programming with OpenGL.

I want to be able to write all my data to one-dimensional textures with the format GL_R8, so that I basically can treat it as an std:array object.

Then during rendering I would like to be able to set how the GPU should read the image, e.g. “cast” it to 1024×1024 BGRA.

Is this possible?

e.g. what I want to be able to do:

gpu::array<uint8_t> data(GL_R8, width*height*4);
gpu::bind(data, GL_TEXTURE0, gpu::format::bgra, width, height); 

Answer 1

Then use a buffer texture. There’s no rule (that I know of) that says you can’t hook the same buffer up to multiple different textures. That would allow one texture to use it with the GL_R8 internal format. And another texture could use it with the GL_RGBA8 format.