This patch intends to implement Vertex Attrib Binding on OpenGL
back-ends:

1. Add supports for updating vertex attributes by Vertex Attrib
Binding APIs.
2. Refactor the process of updating vertex attribtues in class
VertexArray to make it easier to implement this feature.

BUG=angleproject:1593
TEST=dEQP-GLES31.functional.vertex_attribute_binding.*

Change-Id: I800e61518c552b94b84c415895ad31668b0a84b2
Reviewed-on: https://chromium-review.googlesource.com/510251
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>

Previously, the broadcast step would not get run in case the main()
function returned before reaching its end. Now the broadcast step is
put in a separate function that wraps main() if needed, so that it
gets run even if the main() function in the original shader source
returns in the middle.

DrawBuffersTest is refactored to use ANGLETest::drawQuad() instead of
calling glDrawArrays directly.

BUG=angleproject:2109
TEST=WebGL conformance tests, angle_end2end_tests

Change-Id: Id5f05094e816df03bc9c8ca62b60de914072682c
Reviewed-on: https://chromium-review.googlesource.com/574597Reviewed-by: Zhenyao Mo <zmo@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>

BUG=

Change-Id: I447900488559622108c0da12a352c88218f9ddc6
Reviewed-on: https://chromium-review.googlesource.com/575201
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>

1. src/common/platform.h updated to define ANGLE_PLATFORM_POSIX on Haiku.
2. include/EGL/eglplatform.h updated to add stubs typedefs for
platform-specific primitives for Haiku.

Change-Id: I28775e909ad9cabec1c474ff4fe0a241eb05d6a1
Reviewed-on: https://chromium-review.googlesource.com/573022
Commit-Queue: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>

The patch adds the new end-points and tokens introduced
by ANGLE_multiview without implementing them.

BUG=angleproject:2062

Change-Id: I9be175263ab54b4f6d7537f05505b87ad763ee2d
Reviewed-on: https://chromium-review.googlesource.com/570051Reviewed-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Olli Etuaho <oetuaho@nvidia.com>
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>

When setting parameters by TexParameter{if} for TEXTURE_2D_MULTISAMPLE,
an INVALID_ENUM error is generated if target is TEXTURE_2D_MULTISAMPLE,
and pname is any sampler state from table 20.11. An INVALID_OPERATION
error is generated if target is TEXTURE_2D_MULTISAMPLE, and pname
TEXTURE_BASE_LEVEL is set to a value other than zero.

BUG=angleproject:1590
TEST=angle_deqp_gles31_tests.exe --deqp-case=dEQP-GLES31.functional.texture.multisample.negative.texture*

Change-Id: I5d71731c11fb6e114a57e753e439e180695a7c79
Reviewed-on: https://chromium-review.googlesource.com/560607
Commit-Queue: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Yunchao He <yunchao.he@intel.com>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>

This makes the TSymbolTable interface cleaner and prepares for making
unique id counting thread-safe.

BUG=angleproject:624
TEST=angle_unittests

Change-Id: Ief99c9fc777603de28ba1517e351bc8a00633590
Reviewed-on: https://chromium-review.googlesource.com/570418
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>

The symbol ids are fetched from the symbol table. A new utility
function is added to make this more convenient.

BUG=angleproject:1490
TEST=angle_unittests, angle_end2end_tests

Change-Id: I780430e3386f6599503d8290c568ca9bc9cad147
Reviewed-on: https://chromium-review.googlesource.com/559535
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>

This was causing an assertion failure in updateStorageLevel when the
storage didn't contain the requested level.  Gate the call behind an
isValidLevel check.

TEST=conformance/misc/type-conversion-test.html

BUG=angleproject:1815

Change-Id: Iadf46d232d5a117ae1ae74c6e71677b1e06a5321
Reviewed-on: https://chromium-review.googlesource.com/572705Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>

Currently we would only check for the color attachment sample count,
which could return incorrect results for depth or stencil-only
Framebuffers.

BUG=angleproject:2108

Change-Id: I378349c91c0139ee507d88fa6a36a86234fea0d4
Reviewed-on: https://chromium-review.googlesource.com/571064Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

The patch addresses code duplication in cases in which main()'s body node
has to be retrieved from the AST.

TEST=angle_unittests

Change-Id: I0ccee41821a5ecb2cdf09f5a928b178d6c037587
Reviewed-on: https://chromium-review.googlesource.com/561521Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Olli Etuaho <oetuaho@nvidia.com>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>

The patch checks whether ANGLE_multiview can be supported in the OpenGL
renderer, updates the caps and adds a workaround field to enable
multiview support through the NV_viewport_array2 extension.

BUG=angleproject:2062
TEST=angle_end2end_tests

Change-Id: I99dae10564db7bcca41d7624f8de272c1d996e09
Reviewed-on: https://chromium-review.googlesource.com/567934Reviewed-by: Olli Etuaho <oetuaho@nvidia.com>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>

The patch adds the specification for the ANGLE_multiview extension
which enables efficient multiview rendering. The views can be laid
out side-by-side onto a 2D texture or rendered on separated layers of
a 2D texture array.

BUG=angleproject:2062

Change-Id: I4edd3ab0cfbb3906d90c2a5667d8d1f99f291f1c
Reviewed-on: https://chromium-review.googlesource.com/559089Reviewed-by: Olli Etuaho <oetuaho@nvidia.com>
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>

Don't add the same node pointer to the AST more than once, and assign
the right symbol ids to symbol nodes.

BUG=angleproject:1490
TEST=angle_unittests, angle_end2end_tests

Change-Id: I3f00e9234245fe4b81a2388df3f83e13c4c24856
Reviewed-on: https://chromium-review.googlesource.com/559534Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>

The patch fixes a compilation bug caused from having local variable
names clash with the variables names from a parent scope.

BUG=angleproject:1815

Change-Id: I3d23faaafdea9be503da99512b204d7a50a3b228
Reviewed-on: https://chromium-review.googlesource.com/571000Reviewed-by: Olli Etuaho <oetuaho@nvidia.com>
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>

This will give the browsers the ability to control the cache size,
query and populate the contents, and trim cache contents on memory
pressure.

BUG=angleproject:1897

Change-Id: I6edaa7d307b890223db98792d5b074e4a7fdfaa4
Reviewed-on: https://chromium-review.googlesource.com/563606
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>

This change added 'buffer' qualifier support in shader which
corresponds to ESSL 3.1 spec, session 4.3.7 'Buffer Variables'.

BUG=angleproject:1951
TEST=angle_unittests:BufferVariablesTest

Change-Id: I2ecb5317d5ea9d378a60b03f86bdae04dbd89e9f
Reviewed-on: https://chromium-review.googlesource.com/534960Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>

TextureD3D_3D::copySubImage worked around missing functionality in D3D11
for copying a framebuffer directly to a texture storage but didn't handle
the case of a texture storage already existing.  This caused the image to
have out-of-date data before the new data was copied into it.  Simply copy
the data from the storage back into the image before performing the copy
from the framebuffer and then copy back to the storage afterwards.

TEST=conformance2/textures/misc/copy-texture-image-webgl-specific.html

BUG=angleproject:1815

Change-Id: I308d6a1d3ecbc738f7d0e232bece433e6b353638
Reviewed-on: https://chromium-review.googlesource.com/567199
Commit-Queue: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>

If a storage already existed, it may have old data in it.  Check if the
image is dirty and copy the initialized memory into the storage before
copying data from the framebuffer.

TEST=conformance/textures/misc/copy-tex-image-and-sub-image-2d

BUG=angleproject:1815

Change-Id: Ic69c5519b2e09e4b62025b1bf413d2a71a4a2afb
Reviewed-on: https://chromium-review.googlesource.com/568410Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>

The only place it was being used was when parsing array declarators.
The declarator only needs to be added to the AST when the variable
has successfully been declared, so this usage was not necessary.

BUG=angleproject:1490
TEST=angle_unittests

Change-Id: I05b8851cfdebc9253c9fda8b12733f23da604ca6
Reviewed-on: https://chromium-review.googlesource.com/569160Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>

Passing COLOR_ATTACHMENTm, where m is greater or equal to
MAX_COLOR_ATTACHMENTS, to a FramebufferTexture* function should
generate an INVALID_OPERATION instead of an INVALID_VALUE error.

BUG=angleproject:2106
TEST=angle_end2end_tests

Change-Id: I99045defcbe5eb2afefac1b45062ee4245f50dd3
Reviewed-on: https://chromium-review.googlesource.com/569966Reviewed-by: Olli Etuaho <oetuaho@nvidia.com>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>

Implement TexStorage2DMultisample api for d3d part.

BUG=angleproject:1590
TEST=angle_end2end_tests --gtest_filter=TextureMultisampleTest*
TEST=angle_deqp_gles31_tests --deqp-case=dEQP-GLES31.functional.texture.multisample.negative.fbo_*

Change-Id: Icbfba45b9c2965af02b54dd4060b7b49970cb74b
Reviewed-on: https://chromium-review.googlesource.com/457161
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>

Collect static functions that are used to create nodes in AST
transformations into a single file.

BUG=angleproject:1490
TEST=angle_unittests

Change-Id: I6f87422988fa088f2f4b48986e378a2909705cb7

Uniforms and attribute names have global scope, according to:
GLSL 1.017 sections 4.2.6, 4.3.3 and 4.3.4.
Thus, they can't have same names.

BUG=angleproject:2014

Change-Id: Ibeb064aca877e404a67b9e3e9b57a0cc42e86f9f

A first test verifies the validation of the extension, and a second
compiles a simple shader and checks the cache behaviour.

These tests don't currently run since the extension is disabled,
but they will start running as soon as we expose it.

BUG=angleproject:1897

Change-Id: Id4a76b83090712a267576069b711eeee29aa81dd

GL_INVALID_ENUM should be generated if the type or format arguments were
not valid for any ReadPixels command.  This validation should happen
before validating if the combination of format and type is valid.

TEST=conformance/reading/read-pixels-test

BUG=angleproject:2000

Change-Id: If49d69655f5ab0a3abbde58b49541c84249c1750

When the mip level was greater than the maximum, it could cause an
out-of-bounds read when trying to query the Texture's size and format
later in the validation.

BUG=740426

Change-Id: Ibd6c977981e5f8b7368c161b7969d9e916c6095b

Add static use information to struct fields that mirrors the static
use information on the struct itself. This way dynamically generated
HLSL doesn't need special handling for initializing fragment inputs
if they are structs.

This fixes a problem with the previous code where dynamically
generated HLSL ended up trying to initialize structs that are not
declared in the HLSL output because they were not being referenced.

BUG=angleproject:2104
TEST=angle_end2end_tests

Change-Id: I21283ce4fe26515d62d95e61f8155dc9a9b44cf1

Gather counters from each shader and group them according the
layout qualifier 'binding' into each buffer.

BUG=angleproject:1729
TEST=angle_end2end_tests:AtomicCounterBufferTest

Change-Id: I8d0cd0d2bf65be37c035b0e1540481c8bee0bae4

TEST=conformance2/textures/misc/copy-texture-image-webgl-specific.html

BUG=angleproject:1815

Change-Id: I146fcf97a9c90f07d6270672c5e44e05602eecf8