We are writing a driver for some proprietary hardware using Gallium. And this hardware supports GL_ARB_texture_float, but requires to change texture format from PIPE_FORMAT_R32G32B32A32_FLOAT to PIPE_FORMAT_R8G8B8A8_UNORM and use four samplers (one R8G8B8A8_UNORM texture for each original color). How we should do it in a Gallium properly? If we will create multiple samplers in create_sampler_view - it can cause a crash, when we have a PIPE_MAX_SAMPLERS num of "large" textures. We want to use something similar to u_transfer_helper, but for this format. So, I have some questions regarding Gallium architecture, which affects this situation:
1. Where we should write a splitter? In a pipe_resource, or in a pipe_transfer, or in a sampler_view? 2. Do you have something related to this case in Gallium already to not to reinvent a bicycle? (If you have, we will use internal functions and not write our own). 3. Do you even support this kind of hardware which splits textures? Because I cannot found any example except u_transfer_helper (but it is only for one specific case, not for general).
_______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/mesa-dev
