HiZ is not a color surface, but an auxiliary depth surface.
Signed-off-by: Nanley Chery <nanley.g.chery@intel.com>
Reviewed-by: Chad Versace <chadversary@chromium.org>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Signed-off-by: Jason Ekstrand <jason@jlekstrand.net>
Reviewed-by: Chad Versace <chadversary@chromium.org>
Reviewed-by: Nanley Chery <nanley.g.chery@intel.com>
Normally, using a non-linear tiling format helps improve cache locality by
ensuring that neighboring pixels are usually close-by in memory. For RGB
formats, this still sort-of holds, but it can also lead to rather terrible
memory access patterns where a single RGB pixel value crosses a tile
boundary and gets split into two pieces in different 4K pages. It also
makes for some rather awkward calculations because your tile size is no
longer an even multiple of surface element size. For these reasons, we
chose to simply never create tiled RGB images in the Vulkan driver.
The GL driver, however, is not so kind so we need to support it somehow. I
briefly toyed with a couple of different schemes but this is the best one I
could come up with. The fundamental problem is that a tile no longer
contains an integer number of surface elements. I briefly considered a
couple other options but found them wanting:
1) Using floats for the logical tile size. This leads to potential
rounding error problems.
2) When presented with a RGB format, just make the tile 3-times as wide.
This isn't so nice because now our tiles are no longer power-of-two
size. Also, it can force the row_pitch to be larger than needed which,
while not strictly a problem for ISL, causes incompatibility problems
with the way the GL driver chooses surface pitches.
The chosen method requires that you pay attention and not just assume that
your tile_info is in the units you think it is. However, it's nice because
it provides a nice "these are the units" declaration in isl_tile_info
itself. Previously, the tile_info wasn't usable as a stand-alone structure
because you had to also know the format. It also forces figuring out how
to deal with inconsistencies between tiling and format back to the caller
which is good because the two different consumers of isl_tile_info really
want to deal with it differently: Computation of the surface size wants
the fewest number of horizontal tiles possible while get_intratile_offset
is far more concerned with things aligning nicely.
Signed-off-by: Jason Ekstrand <jason@jlekstrand.net>
Acked-by: Chad Versace <chadversary@chromium.org>
This should be more compact than the enum isl_channel_select[4] that we
were using before. It's also very convenient because we already had such a
structure in the Vulkan driver we just needed to pull it over.
Signed-off-by: Jason Ekstrand <jason@jlekstrand.net>
Reviewed-by: Topi Pohjolainen <topi.pohjolainen@intel.com>
In particular, this means that isl_view::base_array_layer and
isl_view::array_len get applied to 3-D textures but only when rendering.
We were already applying isl_view::base_array_layer for rendering into 3-D
textures so this isn't a huge deviation.
Signed-off-by: Jason Ekstrand <jason@jlekstrand.net>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Generated by:
sed -i -e 's/brw_device_info/gen_device_info/g' src/intel/**/*.c
sed -i -e 's/brw_device_info/gen_device_info/g' src/intel/**/*.h
sed -i -e 's/brw_device_info/gen_device_info/g' **/i965/*.c
sed -i -e 's/brw_device_info/gen_device_info/g' **/i965/*.cpp
sed -i -e 's/brw_device_info/gen_device_info/g' **/i965/*.h
Signed-off-by: Jason Ekstrand <jason@jlekstrand.net>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
It's been in elements for a while but, for whatever reason, the parameter
names in the header file never got updated.
Signed-off-by: Jason Ekstrand <jason@jlekstrand.net>
Reviewed-by: Topi Pohjolainen <topi.pohjolainen@intel.com>
Cc: 12.0 <mesa-stable@lists.freedesktop.org>
Signed-off-by: Nanley Chery <nanley.g.chery@intel.com>
Reviewed-by: Chad Versace <chad.versace@intel.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
A while ago we got rid of the bits-per-block because we thought we didn't
need it. We're about to introduce some very useful 1 and 2-bit formats so
we really should be able to handle them again.
Reviewed-by: Chad Versace <chad.versace@intel.com>
This is based on a very long set of discussions between Chad and myself
about how we should properly represent HiZ and CCS buffers. The end result
of that discussion was that a tiling actually has two different sizes, a
logical size in elements, and a physical size in bytes and rows. This
commit reworks ISL's pitch and size calculations to work in terms of these
two sizes.
Reviewed-by: Chad Versace <chad.versace@intel.com>
This is just a copy-and-paste from brw_surface_formats.c. For the
supports_vertex_fetch function, we do a bit more work so that it properly
handles Bay Trail.
Also, make changes needed for successful compilation and registration
as a texture compression mode.
Signed-off-by: Nanley Chery <nanley.g.chery@intel.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
We want to call this function from the shader compiler and having a full
isl_device available at that point isn't practical.
Reviewed-by: Chad Versace <chad.versace@intel.com>
C++ doesn't support designated initializers and g++ in particular doesn't
handle them when the struct gets complicated, i.e. has a union.
Reviewed-by: Chad Versace <chad.versace@intel.com>
The old function tried to work in elements which isn't, strictly speaking,
a valid thing to do. In the case of a non-power-of-two format, there is no
guarantee that the x offset into the tile is a multiple of the format
block size. This commit refactors it to work entirely in terms of a tiling
(not a surface) and bytes/rows.
Reviewed-by: Nanley Chery <nanley.g.chery@intel.com>
