Previously, if a fragment shader accessed gl_FragCoord or
gl_FrontFacing, we would assign them their own slots in the fragment
shader input attribute array, using up space that could be made
available to real varyings. This was not strictly necessary (since
these values are not true varyings, and are instead computed from
other data available in the FS payload). But we had to do it anyway
because the SF/SBE setup code assumed that every 1 bit in the
gl_program::InputsRead bitfield corresponded to a genuine varying
variable.
Now that the SF/SBE code consults brw_wm_prog_data and only sets up
the attributes that the fragment shader actually needs, we don't have
to do this anymore.
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Previously, the SF/SBE setup code delivered varying inputs to the FS
in the order in which they appear in the gl_program::InputsRead
bitfield, since that's what the FS expects.
When we add support for more than 64 varying components, this will no
longer always be the case, because the Gen6+ SF/SBE stage is only
capable of performing arbitrary reorderings of 16 varying slots. So,
when there are more than 16 vec4's worth of varying inputs, the FS
will have to adjust the order its input varyings in order to partially
match the order of outputs from the geometry or vertex shader.
To allow extra flexibility in the ordering of FS varyings, this patch
causes the SF/SBE to deliver varying inputs to the FS in exactly the
order that the FS requests, by consulting brw_wm_prog_data::urb_setup
and brw_wm_prog_data::num_varying_inputs.
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
We always program the SF unit to start reading the vertex URB entry at
offset 1. In upcoming patches, we'll be adding FS code that relies on
this. So consistently use the constant BRW_SF_URB_ENTRY_READ_OFFSET
rather than hardcoding a 1.
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Previously, we assumed that the number of varying inputs consumed by
the fragment shader was equal to the number of bits set in
gl_program::InputsRead. However, we'll soon be making two changes
that will cause that not to be true:
- We'll stop wasting varying input space for gl_FragCoord and
gl_FrontFacing, which aren't varyings.
- For fragment shaders that have more than 16 varying inputs, we'll
adjust the layout of the inputs to account for the fact that the
SF/SBE pipeline stage can't reorder inputs beyond the first 16; if
there are GS outputs that the FS doens't use (or vice versa) this
may cause the number of FS varying inputs to change.
So, instead of trying to guess the number of FS inputs from
gl_program::InputsRead, simply read it from
brw_wm_prog_data:num_varying_inputs, which is guaranteed to be correct
since it's populated by fs_visitor::calculate_urb_setup().
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
On gen4-5, the FS stage reads varying inputs from URB entries that
were output by the SF thread, where each register stores the
interpolation setup for two components of a vec4, therefore the FS
urb_read_length is twice the number of FS input varyings. On gen6+,
varying inputs are directly deposited in the FS payload by the SF/SBE
fixed function logic, so urb_read_length is irrelevant.
However, in future patches, it will be nice to be able to consult
brw_wm_prog_data to determine how many varying inputs the FS expects
(rather than inferring it from gl_program::InputsRead). So instead of
storing urb_read_length, we simply store num_varying_inputs in
brw_wm_prog_data. On gen4-5, we multiply this by 2 to recover the URB
read length.
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
At the moment, for Gen6+, the FS assumes that all varying inputs are
delivered to it in the order in which they appear in the
gl_program::InputsRead bitfield, and the SF/SBE setup code ensures
that they are delivered in this order.
When we add support for more than 64 varying components, this will no
longer always be possible, because the Gen6+ SF/SBE stage is only
capable of performing arbitrary reorderings of 16 varying slots.
To allow extra flexibility in the ordering of FS varyings, this patch
causes the FS to advertise exactly what ordering it expects.
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
For each sampler type, this tests that:
- The base type is GLSL_TYPE_SAMPLER.
- The dimensionality is set correctly.
- The returned data type is correct.
- The sampler_array and sampler_shadow flags are set correctly.
- sampler_coordinate_components() returns the correct value.
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Ian Romanick <idr@freedesktop.org>
It seems a user app can get us into this state, I trigger the fail
running fbo-maxsize inside virgl, it fails to create the backing
storage for the texture object, but then segfaults here when it
should fail the completeness test.
Cc: "9.2" <mesa-stable@lists.freedesktop.org>
Reviewed-by: Brian Paul <brianp@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Fix the return type and allow src and dst types for comparison
to be separate, this at least fixes the two test cases I've written.
v2: drop the u32->s32 change
Acked-by: Christoph Bumiller <christoph.bumiller@speed.at>
Signed-off-by: Dave Airlie <airlied@redhat.com>
When the old contents do not need to be preserved, it is faster to
create a new backing bo rather than stall.
Signed-off-by: Rob Clark <robclark@freedesktop.org>
max_index may be 0xffffffff. The hardware does not need 1 + max_index
(although it does not hurt unless max_index wraps around to zero).
Signed-off-by: Rob Clark <robclark@freedesktop.org>
For mem->gmem we don't sample depth/stencil as it's native type. So we
need to setup the swizzle state for the sampler based on the format used
for sampling.
Signed-off-by: Rob Clark <robclark@freedesktop.org>
Needed by some games, like etuxracer and supertuxkart which use alpha
test rather than blending, to handle texture transparency.
Signed-off-by: Rob Clark <robclark@freedesktop.org>
With a debug option to force DIRECT (mainly to make it easier for
capturing cmdstream dumps). Using INDIRECT for large shaders at least
makes a noticable reduction in CPU load, which helps for CPU limited
games.
Signed-off-by: Rob Clark <robclark@freedesktop.org>
Because of how the tiling works, we can't really flush at arbitrary
points very easily. So wraparound is handled by resetting to top of
ringbuffer. Previously this would stall until current rendering is
complete. Instead cycle through multiple ringbuffers to avoid a stall.
Signed-off-by: Rob Clark <robclark@freedesktop.org>
Emit markers by writing to scratch registers in order to "triangulate"
gpu lockup position from post-mortem register dump. By comparing
register values in post-mortem dump to command-stream, it is possible to
narrow down which DRAW_INDX caused the lockup.
Signed-off-by: Rob Clark <robclark@freedesktop.org>
Have a single helper that all draws come through.. mainly for a
convenient debug and instrumentation point.
Signed-off-by: Rob Clark <robclark@freedesktop.org>
The varying-out config comes from the inputs of the frag shader (so that
we aren't exporting unneeded varyinges). The varyings-count should come
from the frag shader as well, to avoid a discrepency in configuration
and resulting gpu lockup.
Signed-off-by: Rob Clark <robclark@freedesktop.org>
These functions are defined in EXT_texture_array, which makes no
mention of what shader types they should be allowed in. At the time
EXT_texture_array was introduced, functions ending in "Lod" were
available only in vertex shaders, however this restriction was lifted
in later spec versions and extensions.
We already have the function lod_exists_in_stage() for figuring out
whether functions ending in "Lod" should be available, so just re-use
that.
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This gets the VS, GS, and PS all using the same data structure.
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Paul Berry <stereotype441@gmail.com>
Since BRW_MAX_WM_SURFACES is greater than BRW_MAX_VEC4_SURFACES, the
existing array isn't large enough to be used by the WM. Increasing it
will make it possible to share them.
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Paul Berry <stereotype441@gmail.com>
These are largely based on the similar fields in brw->wm.
v2: Add a better comment than "Scratch buffer".
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Paul Berry <stereotype441@gmail.com>
Everyone at the Khronos meeting was as surprised that GLSL didn't
already support this as we were. Several vendors said they'd ship it,
but there didn't seem to be enough interest to put in the effort to make
it ARB or KHR.
v2: Fix a couple typos and rename the spec file to
EXT_shader_integer_mix.spec. Suggested by Roland.
Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Roland Scheidegger <sroland@vmware.com>
start_instance doesn't affect gl_InstanceID.
There's no piglit test, but it's kinda obvious the code was wrong.
Reviewed-by: Christian König <christian.koenig@amd.com>
The shader is responsible for writing to streamout buffers using
the TBUFFER_STORE_FORMAT_* instructions.
The locations of some input SGPRs and VGPRs are assigned dynamically, because
the input SGPRs controlling streamout are not declared if they are not needed,
decreasing the indices of all following inputs.
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
So that the "init" state is always emitted first and not later in draw_vbo.
This fixes streamout where the "init" state, which disables streamout,
was emitted in draw_vbo after streamout was enabled.
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
This could happen if set_stream_output_targets is called twice
in a row without a draw call in between.
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Paused transform feedback objects may refer to a program other than the
current program. If any active objects refer to a program, LinkProgram
must reject the request to relink.
The code to detect this is ugly since _mesa_HashWalk is awkward to use,
but unfortunately we can't use hash_table_foreach since there's no way
to get at the underlying struct hash_table (and even then, we'd need to
handle locking somehow).
Fixes the last subcase of Piglit's new ARB_transform_feedback2
api-errors test.
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
This is actually a pretty important error condition: otherwise, you
could set up transform feedback with one program, and resume it with
a program that generates a completely different set of outputs.
Fixes a subcase of Piglit's new ARB_transform_feedback2 api-errors test.
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
The next few patches will use this for API error checking.
All of the drivers appear to CALLOC_STRUCT transform feedback objects,
so this should be properly NULL initialized on creation.
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
