Geometry and tessellation shaders process multiple vertices; their
inputs are arrays indexed by the vertex number. While GLSL makes
this look like a normal array, it can be very different behind the
scenes.
On Intel hardware, all inputs for a particular vertex are stored
together - as if they were grouped into a single struct. This means
that consecutive elements of these top-level arrays are not contiguous.
In fact, they may sometimes be in completely disjoint memory segments.
NIR's existing load_input intrinsics are awkward for this case, as they
distill everything down to a single offset. We'd much rather keep the
vertex ID separate, but build up an offset as normal beyond that.
This patch introduces new nir_intrinsic_load_per_vertex_input
intrinsics to handle this case. They work like ordinary load_input
intrinsics, but have an extra source (src[0]) which represents the
outermost array index.
v2: Rebase on earlier refactors.
v3: Use ssa defs instead of nir_srcs, rebase on earlier refactors.
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Jason Ekstrand <jason.ekstrand@intel.com>
get_io_offset() already walks the dereference chain and discovers
whether or not we have an indirect; we can just return that rather than
computing it a second time via deref_has_indirect(). This means moving
the call a bit earlier.
By returning a nir_ssa_def *, we can pass back both an existence flag
(via NULL checking the pointer) and the value in one parameter. It
also simplifies the code somewhat. nir_lower_samplers works in a
similar fashion.
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Jason Ekstrand <jason.ekstrand@intel.com>
While upgrading Mesa to the new 0.170.2 API, it's convenient to have all
three headers available in the tree:
- vulkan-0.138.2.h, the old one
- vulkan-0.170.2.h, the new one
- vulkan.h, the one in transition
From the LunarG SDK at tag sdk-0.9.1, import vulkan.h as
vulkan-0.170.2.h. This header is the first provisional header with the
addition of minor fixes.
This is only a half of the work. The next patch will handle
gl_SampleID/SamplePos, which is the other half of ARB_sample_shading.
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
Required by ARB_sample_shading for drivers that don't want a shader variant
in st/mesa.
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
Acked-by: Roland Scheidegger <sroland@vmware.com>
The spec doesn't require it. This fixes a crash on Android.
v2: don't set any flags if ctx == NULL
v3: add the spec note
Cc: 10.6 11.0 <mesa-stable@lists.freedesktop.org>
Reviewed-by: Albert Freeman <albertwdfreeman@gmail.com>
Reviewed-by: Frank Binns <frank.binns@imgtec.com>
Not needed and it can be NULL.
v2: fix dri2_get_fence_from_cl_event - thanks Albert
Cc: 10.6 11.0 <mesa-stable@lists.freedesktop.org>
Reviewed-by: Albert Freeman <albertwdfreeman@gmail.com>
We will only do depth-only or stencil-only decompress blits, whichever is
needed by textures, instead of always doing both.
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
