This change lets us create egl::Surfaces from a D24S8 config. This is
a bit hacky, because the spec only mandates 24 -or- 32 bit depth
support, but not both or either individually. Will need follow-up work
for proper EGL config setup.

A single depth buffer is allocated for the entire set of swapchain
images and is used with each. This also might be a problem if we're
rendering to multiple frames at the same time. We'll likely have to
revisit this in the future as well.

This adds a new RenderTargetVk to the SurfaceVk class which points to
the Depth/Stencil image. Since ImageViews must refer to either the
depth or stencil, but not both, we'll need to address this when we
get to implementing depth/stencil texture reads in shaders.

Bug: angleproject:2357
Change-Id: Ibed0eed7e1d0efb272758dbfc79fa2c5aa93997f
Reviewed-on: https://chromium-review.googlesource.com/919761Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

Unmangled names of built-ins are not inserted to the symbol table in
a normal way, so the function to do that is not needed.

BUG=angleproject:2267
TEST=compile ANGLE

Change-Id: I68bae9a1f762ecc69ab31f04458a38c941b9d74c
Reviewed-on: https://chromium-review.googlesource.com/922202Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>

Also teach MSVC that ANGLE_CRASH() can't return.

Also fix instances of the warning in build configurations where
UNREACHABLE() can return (e.g. release without dcheck_always_on
or debug).

If the UNREACHABLE()s are truly unreachable, this change has
no behavior change.

Bug:  chromium:810767

Change-Id: I68f3587cf3e268c3ef634dce7ae3d70399859d0f
Reviewed-on: https://chromium-review.googlesource.com/914842Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Nico Weber <thakis@chromium.org>
Commit-Queue: Nico Weber <thakis@chromium.org>

This is to fix error messages when running GLES1 samples (and probably
other apps) from different directories than the same one as where
libGLESv1_CM.dylib is located.

BUG=angleproject:2306

Change-Id: I24ab33eb1bc805c1e64efab9a0acbfcf10480d94
Reviewed-on: https://chromium-review.googlesource.com/920926Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Lingfeng Yang <lfy@google.com>

Adjust a compile guard around posix_memalign.

Bug: angleproject:2163
Change-Id: I1d2dca24b8a2b8e549df411b1611e9fe0ac9082d
Reviewed-on: https://chromium-review.googlesource.com/920748Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

GLES1 has functions like glFrustum / glTranslatef which are baked 4x4
matrix operations. The purpose of this CL is to add those operations as
library functions in ANGLE, to make it convenient later on.

This is inspired by GLM and tested against GLM-generated numbers.

BUG=angleproject:2306

Change-Id: I3b428a115a935ee4f0d00585ad38745a38cc128c
Reviewed-on: https://chromium-review.googlesource.com/909578
Commit-Queue: Lingfeng Yang <lfy@google.com>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>

Need to include gtest before X11 to avoid defines conflict

BUG=angleproject:2348

Change-Id: If758c53fb5ef010506f13165186110f00c099e07
Reviewed-on: https://chromium-review.googlesource.com/919687Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Commit-Queue: Yuly Novikov <ynovikov@chromium.org>

BUG=angleproject:2188

Change-Id: Icbe78f645b693a5b2ef555feffda0f618209e867
Reviewed-on: https://chromium-review.googlesource.com/757092
Commit-Queue: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Luc Ferron <lucferron@chromium.org>

This makes the current clear color a bit more accessible than using
the current GL state clear color directly. It is stored in the Context
using the Vulkan clear color struct.

This also cleans up the attachment clear values in FramebufferVk and
paves the way for depth/stencil clear when support for depth/stencil
exists.

Bug: angleproject:2357
Change-Id: I0553e4447249325115625a44e9f4b1623c7cb0bc
Reviewed-on: https://chromium-review.googlesource.com/919550
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>

Passing the Renderer pointer instead of the Context pointer makes
these methods a bit easier to work with from the "EGL" sections of
the code. This is a refactoring-only change to aid the Depth/Stencil
implementation.

Bug: angleproject:2357
Change-Id: Icbcc72a1daff4edd947a21672744498781cfc064
Reviewed-on: https://chromium-review.googlesource.com/919523Reviewed-by: Luc Ferron <lucferron@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

Bug: angleproject:2347
Change-Id: I56edfde2dbc020d5c792cc4f107aa4b9d6b71840
Reviewed-on: https://chromium-review.googlesource.com/905895Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Reviewed-by: Luc Ferron <lucferron@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

Flakyness noticed there:
https://ci.chromium.org/buildbot/tryserver.chromium.angle/mac_angle_rel_ng/
https://ci.chromium.org/buildbot/chromium.gpu.fyi/Mac%20FYI%20Release%20%28Intel%29/

Introduced in:
https://chromium-review.googlesource.com/c/angle/angle/+/913108

Change-Id: I9cbd76c0472d023005ded9f957b304a4a769c619
Reviewed-on: https://chromium-review.googlesource.com/919547
Commit-Queue: Luc Ferron <lucferron@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>

* This commit includes a JS file to execute on the spec and
generate the JSON output of all the mandatory texture caps.

Bug: angleproject:2348

Change-Id: I57e969915bdd0e7104e00a73fd3743ff1ecf0a6d
Reviewed-on: https://chromium-review.googlesource.com/911615
Commit-Queue: Luc Ferron <lucferron@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>

BUG=angleproject:2107
BUG=angleproject:2317

Change-Id: I22260e1093dc6c09e4627c62a95ca4088c99e951
Reviewed-on: https://chromium-review.googlesource.com/678480
Commit-Queue: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>

This reverts commit 560bfbcb.

Reason for revert:

Appears to be causing a compile error on the ANGLE roll.
https://chromium-review.googlesource.com/c/chromium/src/+/914429
https://ci.chromium.org/p/chromium/builders/luci.chromium.try/linux_chromium_compile_dbg_ng/11598

/b/swarming/w/ir/cache/builder/linux/src/out/Debug/../../third_party/llvm-build/Release+Asserts/bin/ld.lld: error: undefined symbol: std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >::compare(unsigned long, unsigned long, char const*) const
>>> referenced by StandAlone.cpp

Original change's description:
> Vulkan: Add glslang validator to build.
> 
> This binary will be used to generate internal shaders for
> clearing/blit/etc.
> 
> Bug: angleproject:2339
> Change-Id: I13db7d7a4f5a0155798c9b9a6d2972dd69a680ef
> Reviewed-on: https://chromium-review.googlesource.com/904683
> Commit-Queue: Jamie Madill <jmadill@chromium.org>
> Reviewed-by: Geoff Lang <geofflang@chromium.org>

TBR=ynovikov@chromium.org,geofflang@chromium.org,jmadill@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: angleproject:2339
Change-Id: I7bcedf27831648d4c659294d12cab50f6ef9f33f
Reviewed-on: https://chromium-review.googlesource.com/919141Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Luc Ferron <lucferron@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

This change:
1) uses the new style ANGLE_SKIP_TEST_IF to skip tests.
2) replaces compile-time definition for OSX to skip tests by run-time
function IsOSX() to skip tests, in order to align with ANGLE_SKIP_TEST_IF.
3) fixes a couple of typos.

BUG=angleproject:2005

Change-Id: I5af77d82257536b9eb79e26afa502f5b91ff6d31
Reviewed-on: https://chromium-review.googlesource.com/915861
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>

Bug: angleproject:2352

Change-Id: I0ac83f3173d22a2ee8bc98d2fd7bfa1875d46b8c
Reviewed-on: https://chromium-review.googlesource.com/912358Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Luc Ferron <lucferron@chromium.org>

We are generating the caps map using various bits from the results of
vkGetPhysicalDeviceFormatProperties. This contains all the information
required to fill out "renderable", "texturable" and "filterable".

Later we'll need to read from vkGetPhysicalDeviceImageFormatProperties as
well to get the sampleCounts.

The tests for now are not very meaningful since they use the same logic
as the caps code to build the expected results, however as soon as we'll
add the hard-coded list of mandatory texture caps, the test will be a good
validator that we are not breaking anything.

We only check the optimal set of flags since it is the most restrictive
set.

isTexturable = flags contain VK_FORMAT_FEATURE_SAMPLED_IMAGE_BIT
isFilterable = flags contain VK_FORMAT_FEATURE_SAMPLED_IMAGE_FILTER_LINEAR_BIT
isRenderable = flags contain VK_FORMAT_FEATURE_COLOR_ATTACHMENT_BIT OR
			     VK_FORMAT_FEATURE_DEPTH_STENCIL_ATTACHMENT_BIT

Bug: angleproject:2348

Change-Id: I9da0712190d2678d7e377d6fcd4ca83d23eefd38
Reviewed-on: https://chromium-review.googlesource.com/908712
Commit-Queue: Luc Ferron <lucferron@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>

This gets rid of a few extra ImmutableString to std::string
conversions which makes the code clearer. There doesn't seem to be any
significant effect on performance.

BUG=angleproject:2267
TEST=angle_unittests

Change-Id: I36ebbc8a4130ab8f9d6194feca83ec5dcbc95f78
Reviewed-on: https://chromium-review.googlesource.com/916141Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>

Array brackets are not included in ShaderVariable::name, so they
don't need to be pruned from there either when using the name to
look up the variable.

BUG=angleproject:2267
TEST=angle_unittests --gtest_filter=*InitOutput*Array*

Change-Id: I2b80a88c1d67f7f0dde12880bcfb35fb6d861cd0
Reviewed-on: https://chromium-review.googlesource.com/909109Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>

Create "icd" subdir in angledata directory where the Vulkan mock ICD
json file is stored. This prevents potential loader conflicts with the
layer json files. This change means that when running with the mock
ICD a user will need to set their VK_ICD_FILENAMES env variable to now
point to "<build_out_dir>/angledata/icd/VkICD_mock_icd.json" and make
sure that the built mock icd library resides in the system's shared
object search path.

Bug: angleproject:2159
Change-Id: I802bb61a06a2f370bb1fa7a28d9c3548e5f94ecf
Reviewed-on: https://chromium-review.googlesource.com/914819
Commit-Queue: Tobin Ehlis <tobine@google.com>
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>

BUG=angleproject:2267
TEST=angle_unittests

Change-Id: I9b7e01801caa7235ac5e2d4212ea92e38c1f774d
Reviewed-on: https://chromium-review.googlesource.com/908752
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>

BUG=chromium:810767

Change-Id: Ic0dafc9038b14093fdb799fe382ba8275195c0cc
Reviewed-on: https://chromium-review.googlesource.com/914804Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>

This simple test will be used to debug the Vulkan back-end's basic
scissored clear functionality.

Bug: angleproject:2356
Change-Id: I4bed68740ac57b3cc61f2dfe9164081b05bc31b3
Reviewed-on: https://chromium-review.googlesource.com/914230Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

This enables the copyTexImage2D and copyTexSubImage2D to handle
multisampled source through through the blit path. We attempt to use a
cached texture as an intermediate to resolve to, or create a new texture
if there's a mismatch. The resolved texture is sent through
blit11::copyTexture as normal.

BUG:angleproject:2316
Change-Id: Ie3490b45b1a368300ee13fe5a0b35dc3920364ff
Reviewed-on: https://chromium-review.googlesource.com/911889Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>

This binary will be used to generate internal shaders for
clearing/blit/etc.

Bug: angleproject:2339
Change-Id: I13db7d7a4f5a0155798c9b9a6d2972dd69a680ef
Reviewed-on: https://chromium-review.googlesource.com/904683
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>

This patch intends to support program link validation on geometry
shader itself. A link error should occur when linking a program with
a geometry shader that lacks input primitive or output primitive or
the declaration of 'max_vertices'.

This patch also adds the support of linking a program with geometry
shader in angle_end2end_tests.

BUG=angleproject:1941
TEST=angle_end2end_tests
     dEQP-GLES31.functional.shaders.linkage.es31.geometry.varying.rules.unspecified_*

Change-Id: I25fb08514753102f5dd3ab86211c05d2ca4fd185
Reviewed-on: https://chromium-review.googlesource.com/898842
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>

This reverts commit da91c9a6.

Reason for revert: Causes undefined behaviour in linker.

Original change's description:
> GLES1: Link against angle_util_static instead of angle_util.
> 
> Attempting to work around missing .so on linux bots.
> 
> BUG=angleproject:2303
> 
> Change-Id: I7fabad308afd420987369b460c13c00781113605
> Reviewed-on: https://chromium-review.googlesource.com/909028
> Reviewed-by: Geoff Lang <geofflang@chromium.org>
> Commit-Queue: Geoff Lang <geofflang@chromium.org>

TBR=geofflang@chromium.org,lfy@google.com

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: angleproject:2303
Change-Id: I8d3f3d9bd618d9604cec0f02424f788cab25b3f9
Reviewed-on: https://chromium-review.googlesource.com/913550Reviewed-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Lingfeng Yang <lfy@google.com>
Commit-Queue: Geoff Lang <geofflang@chromium.org>

Directly setting this variable overwrites old value, as might be
unexpected. Instead the path can be prepended to it, so that old
value can still work.

This is needed in order to use additional debugging layers, like
the "api_dump" layer. See https://github.com/LunarG/VulkanTools
for more.

BUG=angleproject:2333

Change-Id: I5338a5b928ffa792cc9b6db5b69713320b5b0842
Reviewed-on: https://chromium-review.googlesource.com/898591
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>

BUG=angleproject:2205
BUG=angleproject:2041
BUG=angleproject:2155

Change-Id: I26bcbb63e147787cd342ec80a86d60cf230be4c9
Reviewed-on: https://chromium-review.googlesource.com/913108Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

To do this we need two types of symbol table levels: A level for
built-ins and a level for user-defined symbols. User-defined symbols
are non-const because function symbols created based on function
prototypes are changed when the function definition is parsed. On the
other hand, we want to make built-in symbols constexpr, so we should
only handle them through const pointers.

This also gets rid of extra empty precision stack levels. Only one
level is needed to store predefined precisions.

BUG=angleproject:2267
TEST=angle_unittests

Change-Id: I9f14b24c2cfce272f22c16e7a8dfb653b849cbeb
Reviewed-on: https://chromium-review.googlesource.com/892879
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>

Build flags to enable Vulkan backend and some small updates.

BUG=angleproject:2314

Change-Id: Ia99cc5a4b326a4cab115652cb12b3fb61033eeee
Reviewed-on: https://chromium-review.googlesource.com/909723
Commit-Queue: Yuly Novikov <ynovikov@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>

No longer needed after https://chromium-review.googlesource.com/513519
Loading libGLESv2 interferes with API tracing tools

BUG=angleproject:1892,angleproject:2343

Change-Id: I2ccbc99377d75d107fd644301402c52466dded21
Reviewed-on: https://chromium-review.googlesource.com/910094Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Yuly Novikov <ynovikov@chromium.org>

Disable the warning for flex-generated output, which contains
lots of intentional fallthrough.

Fixes a bug where GL_SAMPLE_ALPHA_TO_ONE_EXT would fall through
to GL_COVERAGE_MODULATION_CHROMIUM and hence behave like that.

Fixes a bug in the D3D9 state management where invalidating
DIRTY_BIT_POLYGON_OFFSET would also invalidate the stencil bits.

One somewhat common incorrect pattern in ANGLE is nested switch
statements that look like so:

  switch (a) {
    case a1:
      switch (b) {
        case b1:
          ...
          break;
      }
    case a2:
      ...
  }

The assumption here seems to be that the breakk exits the outer
case (here a1), while it in fact only exits the inner switch,
so that we fall through to a2.  In most places, I fixed this
by adding an explicit `break` after the inner switch.

This fixes a bug wher GL_PATH_JOIN_STYLE_CHROMIUM would fall through to
GL_PATH_MITER_LIMIT_CHROMIUM in validation (but since the join style
enum is always > 0, this happened to not have an effect in practice).

This also fixes 87 bugs in GetLoadFunctionsMap() where invalid
values would previously return an unrelated function map instead
of the empty load function map.

Bug: chromium:810767
Change-Id: Ib51388c73fbfc229160e2c10f8fb9364cc7c996c
Reviewed-on: https://chromium-review.googlesource.com/911529
Commit-Queue: Nico Weber <thakis@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>

BUG=810411

Change-Id: I8770b69fe4ab8a8f9bacd141c89e7f83f67f15fb
Reviewed-on: https://chromium-review.googlesource.com/911589Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>

Bug: angleproject:2346

Change-Id: I462a2cb29ceda5563f48b4a3cc1d0aa20f4a49fc
Reviewed-on: https://chromium-review.googlesource.com/907169Reviewed-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>

Because of virtualized contexts, the debug groups are not always popped
in the same order that they are pushed leading to inconsistant state and
sometimes GL_STACK_OVERFLOW errors from the driver.

BUG=angleproject:2354

Change-Id: I0a001002149184dd882c3b17e8451bcd694608ba
Reviewed-on: https://chromium-review.googlesource.com/909794Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>

BUG=angleproject:2205

Change-Id: I7ff1c3d0bb380c73c07dad0a30a4a4a19c17e397
Reviewed-on: https://chromium-review.googlesource.com/909577Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>

Previously, dEQP would just use the first config returned which was
RGBA4 which is not very representitive of what our users would request.

BUG=angleproject:2337
BUG=angleproject:1095
BUG=angleproject:2222

Change-Id: I5c9defc7ce1feaa49407557b88d9bb6b98571771
Reviewed-on: https://chromium-review.googlesource.com/490726Reviewed-by: Luc Ferron <lucferron@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>

BUG=angleproject:2205

Change-Id: Icff414dc7a521205fd3e39af4652b0fdef1cb900
Reviewed-on: https://chromium-review.googlesource.com/909291Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>