In D3D we pack varyings by making a register map, and using the
recommended GLSL ES algorithm to reserve register space. We use
this map to assign row and column slots to each varying and then
produce a semantic index value.

The existing scheme had a number of bugs, and was failing several
angle_end2end_tests. The new design cleans up the code somewhat
and uses a different counting scheme for the semantic indexes:
just sort the varyings in packing order and use a simple
incrementing semantic index per varying. In SM4+, the HLSL compiler
sorts and packs the varyings correctly itself, and in SM3, handle
the cases we don't support by returning an error instead of a D3D
compiler link error.

Also refactor how we store varying information for TF Feedback/
StreamOut. Only store the necessary D3D information, instead of
extra information like the name and type.

This fixes several tests in GLSLTest/*. This also will allow us to
fix interpolation qualifier packing and the structure packing in
HLSL, which seems to work differently than the rest of the varying
types.

BUG=angleproject:1202
TEST=bots,dEQP-GLES3.functional.transform_feedback.*

Change-Id: Ie5bfbb4f71d8bf97f39115fc46d2e61b131df639
Reviewed-on: https://chromium-review.googlesource.com/311241Reviewed-by: Geoff Lang <geofflang@chromium.org>
Tested-by: Jamie Madill <jmadill@chromium.org>

This metadata class captures some of our commonly referenced but also
complex flats into a shared place. We can then re-use them in the
semantic code, the DynamicHLSL linking code, and the program code.

Refactoring patch only.

BUG=angleproject:1202

Change-Id: I8b6088cfa5488c5173a6f06c15abab5a4ead4cb8
Reviewed-on: https://chromium-review.googlesource.com/311700
Tryjob-Request: Jamie Madill <jmadill@chromium.org>
Tested-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>

Add a script to run "gclient config" and edit the output, since
gclient will no longer do what we want.

BUG=angleproject:1204
TEST=none

Change-Id: I00e214490967e14034c935e051acc39229f27ff7
Reviewed-on: https://chromium-review.googlesource.com/312233Reviewed-by: Geoff Lang <geofflang@chromium.org>
Tested-by: Frank Henigman <fjhenigman@chromium.org>

This reverts commit 45a7d64f.

Change-Id: I7f94609fc7cf14220d98c61e73a13311d3cc4ecd
Reviewed-on: https://chromium-review.googlesource.com/311245
Tryjob-Request: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Tested-by: Corentin Wallez <cwallez@chromium.org>

We thought we could rely on GLX_create_context_attrib being present but
this is not the case with VM drivers. Instead we fallback to creating
contexts with glXCreateContext that doesn't offer control on which
version and profile the context will have.

Likewise we may not always be able to use the multisample but we can
safely assume that the number of samples and sample buffers are zero in
this case.

BUG=angleproject:1206

Change-Id: I888c69e609764994baf86386c9683b3edeb320f7
Reviewed-on: https://chromium-review.googlesource.com/312230Reviewed-by: Geoff Lang <geofflang@chromium.org>
Tested-by: Corentin Wallez <cwallez@chromium.org>

Passes all ETC1 related dEQP tests on Windows.

BUG=angleproject:1212
TEST=dEQP-GLES2.capability.extensions.compressed_texture_formats.GL_OES_compressed_ETC1_RGB8_texture
TEST=dEQP-GLES2.functional.texture.format.*
TEST=dEQP-GLES2.functional.texture.wrap.*
TEST=dEQP-GLES2.functional.texture.filtering.*
TEST=dEQP-GLES3.functional.texture.format.compressed.etc1*
TEST=dEQP-GLES3.functional.texture.filtering.*

Change-Id: I937b039f90161bb5e8777766ea0c032ddfbbf159
Reviewed-on: https://chromium-review.googlesource.com/312416Reviewed-by: Geoff Lang <geofflang@chromium.org>
Tryjob-Request: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Minmin Gong <mgong@microsoft.com>

Re-land with fix for compile errors.

Refactoring patch which moves code only. Work and full description
will follow in a subsequent CL.

BUG=angleproject:1202

Change-Id: Ib7c7dbd32491cdd9512dbecdc0e1e90303d8f28d
Reviewed-on: https://chromium-review.googlesource.com/312481
Tryjob-Request: Jamie Madill <jmadill@chromium.org>
Tested-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>

Re-reland with a warning fix.

We would like to use the EXT_swap_control extension to specify the swap
interval of each drawable independently. However open source drivers do
not expose this extension and instead expose the MESA and SGI versions
that have a global swap interval.

This commit changes the code to use the best swap_control extension it
can, potentially changing the swap interval on each swap buffers on
lesser extensions.

BUG=angleproject:1206

Change-Id: I7ecf1eed6808672f277d0242d65f90d7851d2a32
Reviewed-on: https://chromium-review.googlesource.com/312322
Tryjob-Request: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Tested-by: Corentin Wallez <cwallez@chromium.org>

This reverts commit a1393c59.

Change-Id: I5da0f740a7073f14ad1ee7e2876a9cc71a706e7f
Reviewed-on: https://chromium-review.googlesource.com/312231Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Tested-by: Corentin Wallez <cwallez@chromium.org>

Reland with a compilation fix.

We would like to use the EXT_swap_control extension to specify the swap
interval of each drawable independently. However open source drivers do
not expose this extension and instead expose the MESA and SGI versions
that have a global swap interval.

This commit changes the code to use the best swap_control extension it
can, potentially changing the swap interval on each swap buffers on
lesser extensions.

BUG=angleproject:1206

Change-Id: I6c24217c7cfd5e09f60469cc7d6336cd68bc5c32
Reviewed-on: https://chromium-review.googlesource.com/312270Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tryjob-Request: Jamie Madill <jmadill@chromium.org>
Tested-by: Corentin Wallez <cwallez@chromium.org>

Reland with a fix for a compilation that happened because of a bad
rebase.

Previously there was a TODO to check if we supported ES3 before setting
the conformant bitfield. Now it is done.

BUG=angleproject:1188

Change-Id: I3ef2bd2bc71fb61c465085d32cf08a633904caa6
Reviewed-on: https://chromium-review.googlesource.com/312271Reviewed-by: Geoff Lang <geofflang@chromium.org>
Tested-by: Corentin Wallez <cwallez@chromium.org>

Without this fix, angle_end2end_tests links fine on Trusty
but not on Precise or older versions of Linux (util/linux/LinuxTimer.cpp
calls clock_gettime(), which is part of libc on newer versions of the
OS but requires -lrt on older versions. GYP had the dependency specified
but GN didn't).

R=cwallez@chromium.org
BUG=432959, 531296

Change-Id: I70e1f701d099f3ba72c7e5dfd7af6d47658ffad9
Reviewed-on: https://chromium-review.googlesource.com/312298Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Tested-by: Corentin Wallez <cwallez@chromium.org>

Sometimes short-circuiting operators need to be unfolded to if
statements. If the unfolded operator is inside a loop condition or
expression, it needs to be evaluated repeatedly inside the loop. Add
logic to UnfoldShortCircuitToIf that can move or copy the unfolded part
of loop conditions or expressions to inside the loop.

The exact changes that need to be done depend on the type of the loop.
For loops may require also moving the initializer to outside the loop.

The unfolded expression inside a loop condition or expression is moved
or copied to inside the loop on the first traversal of the loop node,
and unfolding to if is deferred until a second traversal. This keeps the
code relatively simple.

BUG=angleproject:1167
TEST=WebGL 2 conformance tests,
     dEQP-GLES2.functional.shaders.*select_iteration_count*

Change-Id: Ieffc0ea858186054378d387dca9aa64a5fa95137
Reviewed-on: https://chromium-review.googlesource.com/310230Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Zhenyao Mo <zmo@chromium.org>
Tested-by: Olli Etuaho <oetuaho@nvidia.com>

After this patch, ANGLE no longer accepts constructors where any of
multiple parameters is sampler or void.

Also, structure array constructors with just one parameter are now
accepted.

Error message for a constructor with no parameters is also more
informative than before.

BUG=angleproject:1193
TEST=angle_unittests

Change-Id: I6b897973448cf500096f612b3b95dcc23aebc716
Reviewed-on: https://chromium-review.googlesource.com/311590Reviewed-by: Zhenyao Mo <zmo@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tryjob-Request: Olli Etuaho <oetuaho@nvidia.com>
Tested-by: Olli Etuaho <oetuaho@nvidia.com>

Compile error:

c:\b\build\slave\gpu_win_builder\build\src\third_party\angle\src\libangle\renderer\d3d\dynamichlsl.cpp(508) : error C3861: 'getSemanticInfo': identifier not found
c:\b\build\slave\gpu_win_builder\build\src\third_party\angle\src\libangle\renderer\d3d\dynamichlsl.cpp(642) : error C3861: 'getSemanticInfo': identifier not found

BUG=angleproject:1202

This reverts commit d992cde2.

Change-Id: I11f34d2ac4cc047c397e45348cb9502676380be0
Reviewed-on: https://chromium-review.googlesource.com/312480Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Jamie Madill <jmadill@chromium.org>

Refactoring patch which moves code only. Work and full description
will follow in a subsequent CL.

BUG=angleproject:1202

Change-Id: I60346c516209a0517fc2bac38e0d04ff56bcbc3c
Reviewed-on: https://chromium-review.googlesource.com/311260Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Tested-by: Jamie Madill <jmadill@chromium.org>

Fixes build on Linux.

This reverts commit 46439bae.

Change-Id: Ie6da92e3ee6cc535f2c153a12af0aa63f6bea665
Reviewed-on: https://chromium-review.googlesource.com/312442Reviewed-by: Olli Etuaho <oetuaho@nvidia.com>
Tested-by: Olli Etuaho <oetuaho@nvidia.com>

The previous solution for constant folding constructors was significantly
overengineered and partially incorrect. Switch to a much simpler
constructor folding function that does not use an AST traverser, but
simply iterates over the constant folded parameters of the constructor
and doesn't do any unnecessary checks. It also reuses some code for
constant folding other built-in functions.

This fixes issues with initializing constant matrices with only a single
parameter. Instead of copying the first component of the constructor
parameter all over the matrix, passing a vec4 or matrix argument now
assigns the values correctly.

BUG=angleproject:1193
TEST=angle_unittests, WebGL conformance tests

Change-Id: I50b10721ea30cb15843fba892c1b1a211f1d72e5
Reviewed-on: https://chromium-review.googlesource.com/311191
Tryjob-Request: Olli Etuaho <oetuaho@nvidia.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Zhenyao Mo <zmo@chromium.org>
Tested-by: Olli Etuaho <oetuaho@nvidia.com>

This requires removing the assumption that constant folding implies
constness in the constant expression sense from various places in the
code.

This particularly benefits ternary operators, which can now be simplified
if just the condition is a compile-time constant.

In the future, the groundwork that is laid here could be used to implement
more aggressive constant folding of user-defined functions for example.

TEST=angle_unittests
BUG=angleproject:851

Change-Id: I0eede806570d56746c3dad1e01aa89a91d66013d
Reviewed-on: https://chromium-review.googlesource.com/310750Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Olli Etuaho <oetuaho@nvidia.com>
Reviewed-by: Zhenyao Mo <zmo@chromium.org>

Compile error, whoops

This reverts commit 10ad877c.

Change-Id: Ic8c8b7945c7f702b91fc34ab6862e1aadb3e82e7
Reviewed-on: https://chromium-review.googlesource.com/312260Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Tested-by: Corentin Wallez <cwallez@chromium.org>

We would like to use the EXT_swap_control extension to specify the swap
interval of each drawable independently. However open source drivers do
not expose this extension and instead expose the MESA and SGI versions
that have a global swap interval.

This commit changes the code to use the best swap_control extension it
can, potentially changing the swap interval on each swap buffers on
lesser extensions.

BUG=angleproject:1206

Change-Id: I48e40e443ff9a258fc33b38efb0acf6b1f3db103
Reviewed-on: https://chromium-review.googlesource.com/311244Reviewed-by: Geoff Lang <geofflang@chromium.org>
Tested-by: Corentin Wallez <cwallez@chromium.org>

Previously there was a TODO to check if we supported ES3 before setting
the conformant bitfield. Now it is done.

BUG=angleproject:1188

Change-Id: Iffe30ebb5538e205695acd619ca17918d8550f3c
Reviewed-on: https://chromium-review.googlesource.com/311690Reviewed-by: Geoff Lang <geofflang@chromium.org>
Tested-by: Corentin Wallez <cwallez@chromium.org>

Also move this type to D3D-only world. It was only used in the D3D
renderer and has specific stuff like register/semantic indexes.

Refactoring patch to clean up further work with Varyings.

BUG=angleproject:1202

Change-Id: I4b1d6899e9eef356efc7d11e9cd6cf88b234aa76
Reviewed-on: https://chromium-review.googlesource.com/311240Reviewed-by: Geoff Lang <geofflang@chromium.org>
Tested-by: Jamie Madill <jmadill@chromium.org>

Similarly to line loops, we fully unpack the index data into a
triangle list.

BUG=angleproject:597

Change-Id: Icf91cb77df0a941640e34a975898543e1dac5752
Reviewed-on: https://chromium-review.googlesource.com/310501Reviewed-by: Geoff Lang <geofflang@chromium.org>
Tested-by: Jamie Madill <jmadill@chromium.org>

BUG=angleproject:1190

Change-Id: I38604de469c5f7efaf37bcebf20bc6425df35e62
Reviewed-on: https://chromium-review.googlesource.com/309512Reviewed-by: Geoff Lang <geofflang@chromium.org>
Tryjob-Request: Jamie Madill <jmadill@chromium.org>
Tested-by: Austin Kinross <aukinros@microsoft.com>

Instead of using constructor functions to initialize variables, it is
better to use literal initializer syntax provided by HLSL when it is
possible. This way shader complexity is reduced and constant array
initialization doesn't have to go through as many AST transformations.

Before this patch, vec4 initialization would result in the following
kind of HLSL:

float4 f = float4(1.0, 2.0, 3.0, 4.0);

After this patch, it will be:

float4 f = {1.0, 2.0, 3.0, 4.0};

Before this patch, vec2 array initialization would result in the
following kind of HLSL:

float2 f[2] = {0, 0, 0, 0};
angle_construct_into_2_float2(f, float2(1.0, 2.0), float2(3.0, 4.0));

After this patch, it will be:

float2 f[2] = {1.0, 2.0, 3.0, 4.0};

BUG=angleproject:1094
BUG=541551
TEST=WebGL conformance tests

Change-Id: I9816a8d95a2cba3964922f6b561862d478da6145
Reviewed-on: https://chromium-review.googlesource.com/311160Reviewed-by: Zhenyao Mo <zmo@chromium.org>
Tested-by: Olli Etuaho <oetuaho@nvidia.com>

BUG=angleproject:1207

Change-Id: I425397ca81dfd8be98ffdc5b874d978e7cf7758d
Reviewed-on: https://chromium-review.googlesource.com/310194Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Austin Kinross <aukinros@microsoft.com>
Tryjob-Request: Jamie Madill <jmadill@chromium.org>
Tested-by: Jamie Madill <jmadill@chromium.org>

This reverts commit 26e3736f.

This reverts commit 24db8644.

Ideally we want to use EXT_swap_control as the code currently does as
it allows us to specify the swap interval of each drawable
independently. However open source drivers do not expose this extension
and instead expose the MESA and SGI versions that have a global swap
interval.

This commit changes the code to use the best swap_control extension it
can, potentially changing the swap interval on each swap buffers on
lesser extensions.

BUG=angleproject:1206

Change-Id: I251c6edf400aeeae5359a4370020e74b8e6cae51

This reverts commit 45a7d64f.

Change-Id: I2a8212c7507a7566baca200ed938d9e00f7103c2

This reverts commit 2df979ed.

Change-Id: Iff4ec858b8f42a4749cfc55749eb8f57b419f98f
Reviewed-on: https://chromium-review.googlesource.com/311271Tested-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tryjob-Request: Corentin Wallez <cwallez@chromium.org>

For some reason it cause compile errors with clang on Windows,
potentially with a wrong include order.

BUG=None

Change-Id: I11e9ab4dcc9f601b7d61616c7f61786bec29df91
Reviewed-on: https://chromium-review.googlesource.com/311151Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Corentin Wallez <cwallez@chromium.org>

Unpack the index data into line strips, which can result in a
dynamically number of indices. To this end use a scratch vector in
Renderer11 so we don't end up allocating memory every draw call.

BUG=angleproject:597

Change-Id: Id3270611023cb6d163cd024e078d30ba5556e2ad
Reviewed-on: https://chromium-review.googlesource.com/310500Reviewed-by: Geoff Lang <geofflang@chromium.org>
Tested-by: Jamie Madill <jmadill@chromium.org>

D3D11 handles primitive restart similarly to OpenGL's fixed index,
with a couple differences. It can't be toggled off, so we need to
restrict the max element index (handled in a prior patch), and
for smaller buffer types we need to rewrite the index data.

BUG=angleproject:597

Change-Id: Ib890ce9b3f5511784138ea3953a384b1c483ca9e
Reviewed-on: https://chromium-review.googlesource.com/309639Reviewed-by: Geoff Lang <geofflang@chromium.org>
Tested-by: Jamie Madill <jmadill@chromium.org>

According to the resolution of Khonos bug 10287, we shouldn't be
validating these precisions. Note that this is counter to the
current ESSL spec text, but there's an open action item to change
the spec language.

TEST=dEQP-GLES3.functional.shaders.linkage.uniform.block.differing_precision
BUG=angleproject:1088

Change-Id: Ib05dca792b89e57e90d3a5f9efdb3a202230f585
Reviewed-on: https://chromium-review.googlesource.com/310760Reviewed-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Tested-by: Jamie Madill <jmadill@chromium.org>

Failing the dEQP-GLES3 tests:

http://build.chromium.org/p/chromium.gpu.fyi/builders/Win7%20Release%20dEQP%20%28NVIDIA%29/builds/4036/

3 tests failed:
    dEQP_GLES3.Default/functional_multisample_fbo_4_samples_sample_coverage_invert (c:\b\build\slave\gpu_win_builder\build\src\third_party\angle\src\tests\deqp_support\angle_deqp_gtest.cpp:234)
    dEQP_GLES3.Default/functional_multisample_fbo_8_samples_sample_coverage_invert (c:\b\build\slave\gpu_win_builder\build\src\third_party\angle\src\tests\deqp_support\angle_deqp_gtest.cpp:234)
    dEQP_GLES3.Default/functional_multisample_fbo_max_samples_sample_coverage_invert (c:\b\build\slave\gpu_win_builder\build\src\third_party\angle\src\tests\deqp_support\angle_deqp_gtest.cpp:234)

BUG=angleproject:1161

This reverts commit ff2ab571.

Change-Id: Ibf61fc2c64ffc31778645bfe0292516b1f107397
Reviewed-on: https://chromium-review.googlesource.com/311243Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Jamie Madill <jmadill@chromium.org>

It makes gitiles sad.

Change-Id: I54c1c326bbc579e5591ad5cffae06650d5f24957
Reviewed-on: https://chromium-review.googlesource.com/311082Reviewed-by: Shannon Woods <shannonwoods@chromium.org>
Tested-by: Shannon Woods <shannonwoods@chromium.org>

BUG=544853

Change-Id: I4ca77ed87c15a168c696c15f2438ad21c00985f6
Reviewed-on: https://chromium-review.googlesource.com/310271Reviewed-by: Geoff Lang <geofflang@chromium.org>
Tested-by: Jamie Madill <jmadill@chromium.org>

Also adds a table to document support for various APIs and platforms.

Change-Id: Ie032f553dec23516242a96ce6788fb086fad4229
Reviewed-on: https://chromium-review.googlesource.com/311021Reviewed-by: Geoff Lang <geofflang@chromium.org>
Tested-by: Shannon Woods <shannonwoods@chromium.org>