swr/rast: disable AVX512 optimization of SSE / AVX code

Disable an optimization which implemented sse/avx operations on avx512
using avx512 intrinsics (to avoid switching between lane widths).

Compile with SIMD_OPT_128_AVX512 / SIMD_OPT_256_AVX512 defined to enable
these optimizations.

Reviewed-by: Bruce Cherniak <bruce.cherniak@intel.com>

swr/rast: fix USE_SIMD16_FRONTEND issues

Fix problems found when enabling USE_SIMD16_FRONTEND, mostly related to
vMask / movemask_ps(pd).

Reviewed-by: Bruce Cherniak <bruce.cherniak@intel.com>

swr/rast: simdlib better separation of core vs knights avx512

Reviewed-by: Bruce Cherniak <bruce.cherniak@intel.com>

swr/rast: threadID via portable std::this_thread::get_id()

Replace use of Win32 GetCurrentThreadId() with portable
std::this_thread::get_id().

Reviewed-by: Bruce Cherniak <bruce.cherniak@intel.com>

spirv: Fix SpvImageFormatR16ui

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Cc: "17.1 17.2" <mesa-stable@lists.freedesktop.org>

anv: Advertise VK_KHR_relaxed_block_layout

There is literally no work for us to do here.  It already just works in
our driver.

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>

anv: Bump the advertised version to 1.0.57

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>

anv: Pull the API version from anv_extensions.py

This way everything stays in sync and we only have the one version
number.

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>

anv: Use python to generate ICD json files

This is more lines of code but the python is far easier to read than the
sed expressions we were using before.  Also, this allows us to pull the
API version from anv_entrypoints.py so it never gets out-of-sync.

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>

anv: Add MAX_API_VERSION to anv_extensions.py

The VkVersion class is probably overkill but it makes it really easy to
compare versions in a way that's safe without the caller having to think
about patch vs. no patch.

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>

anv: Make some bits of anv_extensions module-private

This way we can use "from anv_extensions import *" in the entrypoint
generator without worrying too much about pollution

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>

git_sha1_gen: catch any error the same way

Acked-by: Jose Fonseca <jfonseca@vmware.com>
Signed-off-by: Eric Engestrom <eric.engestrom@imgtec.com>

build: Don't bail on OSError in git_sha1_gen.py

When building sandboxed, we may encounter additional errors. Ignore the errors,
as we are in a constrained environment.

This can be observed when building latest git with OBS.

Signed-off-by: Tobias Klausmann <tobias.johannes.klausmann@mni.thm.de>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>

st/mesa: replace st_shader_stage_to_ptarget

Use pipe_shader_type_from_mesa instead.

Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>

mesa: add GLSL 4.60 to shading_language_version()

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>

mesa: add always-false enable for GL 4.6

I believe this should be enough for now.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>

glsl: recognize GLSL 4.60

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>

dri3: Wait for all pending swapbuffers to be scheduled before touching the front

This implements a wait for glXWaitGL, glXCopySubBuffer, dri flush_front and
creation of fake front until all pending SwapBuffers have been committed to
hardware. Among other things this fixes piglit glx-copy-sub-buffers on dri3.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Brian Paul <brianp@vmware.com>
Reviewed-by: Sinclair Yeh <syeh@vmware.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Cc: <mesa-stable@lists.freedesktop.org>

mesa: add KHR_no_error support to glPolygonMode()

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>

mesa: add polygon_mode() helper

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>

mesa: add KHR_no_error support to glClearBufferiv()

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>

mesa: add clear_bufferiv() helper

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>

mesa: add KHR_no_error support to glClearBufferuiv()

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>

mesa: add clear_bufferuiv() helper

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>

mesa: add KHR_no_error support to glClearBufferfi()

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>

mesa: add clear_bufferi() helper

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>

mesa: add KHR_no_error support to glClearBufferfv()

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>

mesa: add clear_bufferfv() helper

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>

mesa: add KHR_no_error support to glClear*Buffer*Data()

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>

mesa: add clear_buffer_sub_data_error() helper

And make clear_buffer_sub_data() always inline.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>

mesa: make get_texbuffer_format() global

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>

mesa: add KHR_no_error support to glLinkProgram()

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>

mesa: add link_program() and link_program_error() helpers

And call link_program_error() from _mesa_link_program().

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>

mesa: add KHR_no_error support to glShaderSource()

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>

mesa: add shader_source() helper

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>

mesa: rename shader_source() to set_shader_source()

There is already get_shader_source(), and shader_source() will
be used for adding KHR_no_error support.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>

mesa: add KHR_no_error support to glEndConditionalRender()

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>

mesa: add end_conditional_render() render

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>

mesa: add KHR_no_error support to glBeginConditionalRender()

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>

mesa: add begin_conditional_render() helper

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>

mesa: add KHR_no_error support to glNamedBufferData() and glBufferData()

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>

mesa: add buffer_data() and buffer_data_error() helpers

And call buffer_data_error() from _mesa_buffer_data().

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>

mesa: add KHR_no_error support to glLineWidth()

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>

mesa: add line_width() helper

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>

pipe-loader: fix driinfo for software and non-radeonsi drivers

Fixes: 678dadf1237 ("gallium: move driinfo XML to pipe_loader")
Reviewed-by: Thomas Hellström <thellstrom@vmware.com>

mesa/st: Reduce the number of frontbuffer flush calls

The mesa state tracker was needlessly flushing the front buffer even if it
hadn't been drawn to since the last flush. This was happening during
glXSwapBuffers if we at some point previously had set that frontbuffer as
a read- or draw renderbuffer, or at glFlush() or glFinish() if we at some
point previously had rendered to the front buffer. Since the frontbuffer
flush typically means a full drawable copy, it's a pretty big waste.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Reviewed-by: Sinclair Yeh <syeh@vmware.com>

Fix gallium SCons build

glsl: look up for transform feedback varyings after linking

Check if shaders have transform feedback varyings also after the
post-link step.

This fixes:
KHR-GL45.enhanced_layouts.xfb_vertex_streams
piglit/spec/arb_enhanced_layouts/gs-stream-location-aliasing

v2: add claryfing comments (Timothy)

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>

radeonsi: add enable_sisched driconf option

Reviewed-by: Marek Olšák <marek.olsak@amd.com>

radeonsi: prepare for driver-specific driconf options

Reviewed-by: Marek Olšák <marek.olsak@amd.com>

pipe-loader: move configuration_query into drm_helper

Having it inline is pointless anyway, since it's only called via a
function pointer.

Reviewed-by: Marek Olšák <marek.olsak@amd.com>

st/dri: implement v2 of DRI_ConfigOptions

Reviewed-by: Marek Olšák <marek.olsak@amd.com>

pipe-loader: extract a standalone get_driver_descriptor helper function

Reviewed-by: Marek Olšák <marek.olsak@amd.com>

pipe-loader: pass only the driver_name to pipe_loader_find_module

Reviewed-by: Marek Olšák <marek.olsak@amd.com>

gallium: add driconf options to pipe_screen_config

Reviewed-by: Marek Olšák <marek.olsak@amd.com>

gallium: move loading of drirc to pipe-loader

v2: rebase compile fix: addition of mesa_no_error

Reviewed-by: Marek Olšák <marek.olsak@amd.com> (v1)

gallium: move driinfo XML to pipe_loader

We will switch to the pipe_loader loading the configuration options,
so that they can be passed to the driver independently of the state
tracker.

Put the description into its own file so that it can be merged easily
with driver-specific options in future commits.

Reviewed-by: Marek Olšák <marek.olsak@amd.com>

gallium: add pipe_screen_config to screen_create functions

This allows a more generic mechanism for passing user configurations
into drivers by accessing the dri options directly.

Reviewed-by: Marek Olšák <marek.olsak@amd.com>

st/drm: add DRM_CONF_XML_OPTIONS

Allow drivers to return the XML that describes the available config
options.

Reviewed-by: Marek Olšák <marek.olsak@amd.com>

util: add merge_driinfo.py

This tool merges driinfo XML that is built using DRI_CONF_xxx macros.
The intention is to merge together state-tracker options with
driver-specific options.

Acked-by: Marek Olšák <marek.olsak@amd.com>

glx: use v2 of DRI_ConfigOptions

Most of the change is concerned with avoiding memory leaks, since v2 of
the DRI extension returns a malloc'ed string. This also allows us to
resolve the long-standing issue of keeping drivers loaded when returning
from glXGetDriverConfig.

Reviewed-by: Marek Olšák <marek.olsak@amd.com>

dri: define a version 2 of the DRI_ConfigOptions extension

The new function is defined to return a malloc'ed pointer. In the
following patches, this helps avoid leaking library handles when pipe
drivers are linked dynamically.

It also allows us to generate the XML string on the fly in the future.

Reviewed-by: Marek Olšák <marek.olsak@amd.com>

radeonsi: enable ARB_transform_feedback_overflow_query

v2: update for new cap name

Reviewed-by: Marek Olšák <marek.olsak@amd.com>

radeonsi: avoid redundant SET_PREDICATION packet with QBO workaround

The QBO workaround compute grid launch emits the render condition atom
when dirty, so install the render condition in the context only after
launching the compute grid. This avoids a redundant SET_PREDICATION.

Reviewed-by: Marek Olšák <marek.olsak@amd.com>

radeonsi: fix streamout overflow predication on VI+

There is a firmware regression that causes failures. Work around it by
using the compute shader for query_buffer_objects to summarize the query
results.

v2: rename to PREDICATION_OP_BOOL64 (consistent with sid.h)

Reviewed-by: Marek Olšák <marek.olsak@amd.com>

gallium/radeon: implement qbo for SO_OVERFLOW_PREDICATE

v2: use R600_MAX_STREAMS instead of 4 (Marek)

Reviewed-by: Marek Olšák <marek.olsak@amd.com>

gallium/radeon: implement basic parts of PIPE_QUERY_SO_OVERFLOW_ANY_PREDICATE

v2: use R600_MAX_STREAMS instead of 4 (Marek)

Reviewed-by: Marek Olšák <marek.olsak@amd.com>

gallium/radeon: fix render predication by SO overflow predicate

The predication bits are "visible or no overflow" and "not visible or
overflow", so we need to invert the check relative to the GL and Gallium
interface semantics.

Also, predication by the other streamout-related queries is not allowed.

Reviewed-by: Marek Olšák <marek.olsak@amd.com>

gallium/radeon: fix ARB_query_buffer_object conversion to boolean

The issue here is that the immediate is treated as a 64-bit value,
and fetching it does not work reliably with swizzles that are different
from xy and zw.

Cc: mesa-stable@lists.freedesktop.org
Reviewed-by: Marek Olšák <marek.olsak@amd.com>

st/mesa: implement ARB_transform_feedback_overflow_query

v2: update for new cap name

Reviewed-by: Marek Olšák <marek.olsak@amd.com>

ddebug: handle get_query_result_resource as a GPU call

Reviewed-by: Marek Olšák <marek.olsak@amd.com>

gallium/util: add util_{str,dump}_query_value_type

Reviewed-by: Marek Olšák <marek.olsak@amd.com>

gallium: add util_dump_query_type and use it in ddebug

Reviewed-by: Marek Olšák <marek.olsak@amd.com>

gallium: rename util_dump_* to util_str_* for enum-to-string conversion

This is mostly mechanical search-and-replace, plus touching up the
macros in u_dump_defines.c manually a bit.

Reviewed-by: Marek Olšák <marek.olsak@amd.com>

gallium: add PIPE_QUERY_SO_OVERFLOW_ANY_PREDICATE and corresponding cap

v2: rename cap to PIPE_CAP_QUERY_SO_OVERFLOW and be a bit more explicit
    in the documentation

Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>

android: export intermediates from libmesa_util

Fixes following build issues:

   In file included from vendor/intel/external/android_ia/mesa/src/mesa/drivers/dri/common/dri_util.c:45:
   vendor/intel/external/android_ia/mesa/src/util/xmlpool.h:103:10: fatal error: 'xmlpool/options.h' file not found
   ...
   In file included from vendor/intel/external/android_ia/mesa/src/mesa/drivers/dri/i965/intel_screen.c:44:
   vendor/intel/external/android_ia/mesa/src/util/xmlpool.h:103:10: fatal error: 'xmlpool/options.h' file not found

Fixes: 601093f9 (xmlconfig: move into src/util)
Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Chih-Wei Huang <cwhuang@linux.org.tw>

intel: move gen_decoder.* back to COMMON_FILES

this change reverts commit 4f695731, we want to be able to build
with -DDEBUG and gen_decoder on Android.

Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>

android: link libmesa_intel_common with zlib and expat

Makes it possible to build Mesa on Android with -DDEBUG with
the next patch that reverts 4f695731.

Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>

ac/nir: Add float cast before shadow comparator clamp.

LLVM complained about passing an i32 to a float clamp.

Signed-off-by: Bas Nieuwenhuizen <basni@google.com>
Fixes: 0f9e32519bb "ac/nir: clamp shadow texture comparison value on VI"
Reviewed-by: Marek Olšák <marek.olsak@amd.com>

i965: Check result of make_surface() for intel_miptree_create_for_bo

Since make_surface() can fail, if the format isn't support by hw or
simlar error, we need to check the result before dereferencing it.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

virgl: add BPTC support.

This just adds the guest checks for BPTC, the host renderer
also needs code to support these.

Signed-off-by: Dave Airlie <airlied@redhat.com>

mesa/st: fix conditional jump depends on uninitialised value

Reported by valgrind at:
glsl_to_tgsi_visitor::visit(ir_expression*) (st_glsl_to_tgsi.cpp:1560)

When compiling the Deus Ex shaders.

Fixes: 28a5e7104 ("st/glsl_to_tgsi: handle precise modifier")
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
Reviewed-by: Karol Herbst <karolherbst@gmail.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>

radeon/ac: use ds_swizzle for derivs on si/cik.

This looks like it's supported since llvm 3.9 at least,
so switch over radeonsi and radv to using it, -pro also
uses this. We can now drop creating lds for these operations
as the ds_swizzle operation doesn't actually write to lds at all.

Acked-by: Marek Olšák <marek.olsak@amd.com>
(stable requested due to fixing radv CIK conformance tests)
Cc: mesa-stable@lists.freedesktop.org
Signed-off-by: Dave Airlie <airlied@redhat.com>

vulkan: Import in the latest 1.0.57 header and XML from Khronos

Acked-by: Dave Airlie <airlied@redhat.com>

ac/nir: fix nir_op_unpack_64_2x32_split_y emission

This was broken thanks to a typo in b2367cf.

Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>

ac/nir: fix lsb emission

This makes it match radeonsi. The LLVM backend itself will emit the
correct instruction, but LLVM might do incorrect optimizations since it
thinks the output is undefined when the input is 0, even though it's not
supposed to be. We really need a new intrinsic, or for the backend to
become smarter and recognize this pattern.

Cc: mesa-stable@lists.freedesktop.org
Reviewed-by: Bas Nieuwenhuizen <basni@google.com>

nir: fix algebraic optimizations

The optimizations are only valid for 32-bit integers. They were
mistakenly firing for 64-bit integers as well.

Cc: mesa-stable@lists.freedesktop.org
Reviewed-by: Matt Turner <mattst88@gmail.com>

anv: Autogenerate extension query and lookup

As time goes on, extension advertising is going to get more complex.
Today, we either implement an extension or we don't.  However, in the
future, whether or not we advertise an extension will depend on kernel
or hardware features.  This commit introduces a python codegen framework
that generates the anv_EnumerateFooExtensionProperties functions as well
as a pair of anv_foo_extension_supported functions for querying for the
support of a given extension string.  Each extension has an "enable"
predicate that is any valid C expression.  For device extensions, the
physical device is available as "device" so the expression could be
something such as "device->has_kernel_feature".  For instance
extensions, the only option is VK_USE_PLATFORM defines.

This mechanism also means that we have a single one-line-per-entry table
for all extension declarations instead of the two tables we had in
anv_device.c and the one we had in anv_entrypoints_gen.py.  The Python
code is smart and uses the XML to determine whether an extension is an
instance extension or device extension.

Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>

anv: Add a new centralized extensions file

This will allow us to keep everything in one place when it comes to
declaring what extensions are supported.

Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>

egl/drm: Fix misused x and y offsets in swrast_get_image()

It fixes misused x and y variables on the calculation of the memory copy regions.

Cc: Giovanni Campagna <gcampagna@src.gnome.org>
Fixes: 8430af5ebe1ee8119e14 "Add support for swrast to the DRM EGL platform"
Signed-off-by: Mun Gwan-gyeong <elongbug@gmail.com>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
[Eric: use gbm_bo_get_bpp() instead of local function, split clamp patch]
Signed-off-by: Eric Engestrom <eric.engestrom@imgtec.com>

egl/drm: Fix misused x and y offsets in swrast_put_image2()

It fixes misused x and y variables on the calculation of the memory copy regions.

Cc: Giovanni Campagna <gcampagna@src.gnome.org>
Fixes: 8430af5ebe1ee8119e14 "Add support for swrast to the DRM EGL platform"
Signed-off-by: Mun Gwan-gyeong <elongbug@gmail.com>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
[Eric: use gbm_bo_get_bpp() instead of local function, split clamp patch]
Signed-off-by: Eric Engestrom <eric.engestrom@imgtec.com>

gbm: add gbm_bo_get_bpp()

Signed-off-by: Eric Engestrom <eric@engestrom.ch>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>

gles: Restore some lost typedefs

GLES/gl.h has historically provided some typedefs that are not
used in the API itself. Restore these typedefs that were lost to
avoid breaking applications.

These seem to be the only typedefs removed in the update.

Fixes: 7fd0817 "Update Khronos-supplied headers"
[Eric: added a big warning to revert this patch when pulling the updated header]
Signed-off-by: Eric Engestrom <eric.engestrom@imgtec.com>

egl: remove unnecessary empty array element

Signed-off-by: Eric Engestrom <eric@engestrom.ch>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>

egl: split enums to make use of -Wswitch

Signed-off-by: Eric Engestrom <eric@engestrom.ch>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>

egl: use designated initaliser for _eglGlobal

Turn comments into actual code, that the compiler can check for us :)
(Speaking of, one of the comments had a typo. Challenge: find it)

Signed-off-by: Eric Engestrom <eric@engestrom.ch>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>

egl: make platform's SwapInterval() optional

Signed-off-by: Eric Engestrom <eric.engestrom@imgtec.com>
Reviewed-by: Daniel Stone <daniels@collabora.com>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Tapani Pälli <tapani.palli@intel.com>

loader: remove clamp_swap_interval()

As of last commit, no invalid swap interval can be stored, so there's
no need to sanitize the values when reading them anymore.

Signed-off-by: Eric Engestrom <eric.engestrom@imgtec.com>
Reviewed-by: Daniel Stone <daniels@collabora.com>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Tapani Pälli <tapani.palli@intel.com>

egl: deduplicate swap interval clamping logic

Signed-off-by: Eric Engestrom <eric.engestrom@imgtec.com>
Reviewed-by: Daniel Stone <daniels@collabora.com>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Tapani Pälli <tapani.palli@intel.com>

glsl: xfb_stride applies to buffers, not block members

When we have an interface block like:

layout (xfb_buffer = 0, xfb_offset = 0) out Block {
                             vec4 var1;
    layout (xfb_stride = 48) vec4 var2;
                             vec4 var3;
};

According to ARB_enhanced_layouts spec:

   "The *xfb_stride* qualifier specifies how many bytes are consumed by
    each captured vertex.  It applies to the transform feedback buffer
    for that declaration, whether it is inherited or explicitly
    declared. It can be applied to variables, blocks, block members, or
    just the qualifier out. [ ...] While *xfb_stride* can be declared
    multiple times for the same buffer, it is a compile-time or
    link-time error to have different values specified for the stride
    for the same buffer."

This means xfb_stride actually applies to the buffer, and not to the
individual components.

In the above example, it means that var2 consumes 16 bytes, and var3 is
at offset 32.

This has been confirmed also by John Kessenich, the main contact for the
ARB_enhanced_layouts specs, and also because this commit fixes:

GL45.enhanced_layouts.xfb_block_member_stride

This commit is in practice a revert of 598790e8564 (glsl: apply
xfb_stride to implicit offsets for ifc block members).

Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>