Blender Git Loki

Add half data type to CUDA device.

Have to clearly check on this though before adding support for actual half textures on GPU, as CUDA (since Toolkit 7.5) only supports a half and half2 data type, no half4.

Half float: Half EXR now uses a half4 slot on CPU.

Code in util_half.h inspired by work from Lukas Stockner.

Still a lot missing (GPU, Data Textures...).

Half Textures: Fix some todos from last commit.

Merge branch 'master' into soc-2016-cycles_images

Cycles: Add some basic code for half4 and half image textures.

Not finished yet, so noting to see here yet.

Merge branch 'master' into soc-2016-cycles_images

Merge branch 'master' into soc-2016-cycles_images

Merge branch 'master' into soc-2016-cycles_images

Adress further review comments.

Avoid passing flat_slot to tex_alloc() as well.

Don't pass flat_slot to tex_free(), handle this inside the device.

Adress review comments.

Little tweaks for ifdefs.

Fixes for Fermi.

Use some more cuda_pop_context(); calls to make following this easier.

Free the CUtexObjects properly.

Only have one bindless_mapping vector, and also load textures for shader() kernel.

This fixes float4 textures o/

Bindless Textures: Move bindless_mapping to CUDADevice.

Merge branch 'master' into soc-2016-cycles_images

Merge branch 'master' into soc-2016-cycles_images