In case gl_Position is statically used in the input shader, setting
the INIT_OUTPUT_VARIABLES flag will initialize gl_Position. Avoid
redundant initialization of gl_Position in this case.

Includes cleaning up memory management in InitOutputVariables_test:
all the pool-allocated variables will be freed at the end of each test
when the memory pool is cleared, so manual memory management is not
needed.

Also includes making the zero node check used in unit tests stricter
so that the tests are more reliable and moving it to
ShaderCompileTreeTest.h so that it can be reused in the future.

BUG=angleproject:2092
TEST=angle_unittests

Change-Id: I323a0a094afa6cea95c8a64e681d9fc485137423
Reviewed-on: https://chromium-review.googlesource.com/549418
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>

The validation would generate the correct errors to satisfy tests but
would skip clears.

TEST=conformance2/reading/format-r11f-g11f-b10f.html
TEST=conformance2/reading/read-pixels-from-fbo-test.html
TEST=conformance2/rendering/clearbuffer-sub-source.html
TEST=deqp/functional/gles3/fbocolorbuffer/clear.html
TEST=deqp/functional/gles3/fboinvalidate/sub.html
TEST=deqp/functional/gles3/framebufferblit/default_framebuffer_*.html

BUG=angleproject:1954

Change-Id: I0f220d06f98b630be5d27c7ffb1837d4ef29e0ac
Reviewed-on: https://chromium-review.googlesource.com/558786Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>

In GL, ReadPixels() is allowed to modify memory that corresponds to
pixels outside the framebuffer.
In WebGL it must not do that, so clip the read area to the framebuffer.

Enable corresponding test.

BUG=angleproject:1815

Change-Id: Ie99401a2102c352ffb1193a57aa66a5b96c184aa
Reviewed-on: https://chromium-review.googlesource.com/540556
Commit-Queue: Frank Henigman <fjhenigman@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>

With the SH_INIT_OUTPUT_VARIABLES option enabled, vertex and fragment
shader outputs get initialized with zeros at the beginning of main.
However, previous to this patch the lvalues in the binary expression did
not receive the correct type. This can lead to incorrect modifications
of the AST in subsequent stages or incorrect output code from the
translator. The patch addresses the issue by copying the type
information from the symbol table.

BUG=angleproject:2081
TEST=angle_unittests
TEST=angle_end2end_tests

Change-Id: I9e062376bcfad7d57b637a5248caebce1c9a0688
Reviewed-on: https://chromium-review.googlesource.com/544982
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>

GLSL ES spec accepts the case where an initializer of a variable calls
a function with the same name as the variable. The HLSL compiler
doesn't accept that. Work around this limitation in the HLSL compiler
by disambiguating user-defined functions from variables with a
different prefix.

BUG=angleproject:2095
TEST=angle_end2end_test, angle_unittests

Change-Id: I41b32a3fcc6fd4c548e8dc3aa680d1b07fcf8719
Reviewed-on: https://chromium-review.googlesource.com/557872Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>

This patch intends to fix a bug in ANGLE GLSL compiler.

In TCompiler::Init(resources), we should initialize maxUniformVectors by
resource.maxComputeUniformComponents / 4 when we attempt to initialize a
compiler for compute shader instead of resource.maxFragmentUniformVectors.

BUG=angleproject:2083

Change-Id: I4901f71ef5ac4f5770e2d5f8ee21786fcf19fbca
Reviewed-on: https://chromium-review.googlesource.com/545190
Commit-Queue: Jiawei Shao <jiawei.shao@intel.com>
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>

Loop condition node may be a declaration node when coming from the
parser, so it shouldn't be casted to TIntermTyped*.

BUG=chromium:738281
TEST=angle_unittests under CFI

Change-Id: Ie98befc4b02b1261949049ddff49404d73db8478
Reviewed-on: https://chromium-review.googlesource.com/558083Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>

The patch modifies the vertex shader's AST to declare and initialize
the global variables ViewID_OVR and InstanceID. Every occurrence of
gl_ViewID_OVR gets replaced by ViewID_OVR and initialized in main
with a value dependent on gl_InstanceID and the number of views.
To guarantee correct results for instanced rendering, each occurrence
of gl_InstanceID is replaced with InstanceID and initialized similarly.

BUG=angleproject:2062
TEST=angle_unittests

Change-Id: I48be688605b5af869bc370758e70ccc209ea4419
Reviewed-on: https://chromium-review.googlesource.com/548596
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>

BUG=chromium:593874, angleproject:2095

Change-Id: I97860f7978d509bb36dfdfb5fac7524e9d24f5fe
Reviewed-on: https://chromium-review.googlesource.com/557599
Commit-Queue: Yuly Novikov <ynovikov@chromium.org>
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>

BUG=chromium:593874
Change-Id: I025f31e422cf3eb5db1730710cca26587c283839
Reviewed-on: https://chromium-review.googlesource.com/557350Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Commit-Queue: Yuly Novikov <ynovikov@chromium.org>

Broken by https://chromium-review.googlesource.com/c/522874/
on Linux Release (AMD R7 240) build 2431

BUG=angleproject:1897
TBR=jmadill@chromium.org

Change-Id: I4c1f99a839f215b4c284ae1667d0a3b0774281c7
Reviewed-on: https://chromium-review.googlesource.com/557259Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Commit-Queue: Yuly Novikov <ynovikov@chromium.org>

Fails on Win10 Intel HD 530 and 630 bots.

BUG=angleproject:1815
TBR=fjhenigman@chromium.org

Change-Id: I27227cfa882f448e8b2de76e16dfe0dfe91703d2
Reviewed-on: https://chromium-review.googlesource.com/556759
Commit-Queue: Yuly Novikov <ynovikov@chromium.org>
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>

This will need to be matched with a corresponding browser-side CL.
It will enable writing out binary shaders to disk.

BUG=angleproject:1897

Change-Id: I443281086050b9711b92a034cf37f808dd919007
Reviewed-on: https://chromium-review.googlesource.com/542963Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

When copying from a non-mappable NativeStorage to a system memory
based storage, a staging buffer storage should be used. Currently
this is only done for PackStorage.

This covers the missed SystemMemoryStorage and
EmulatedIndexedStorage. Also it adds a triggering test case to
expose the bug.

BUG=angleproject:2076

Change-Id: I278a0eef85751e966c1c48ddd71010092a14a3f7
Reviewed-on: https://chromium-review.googlesource.com/542595
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>

This is useful for building the sample within Chromium rather than
in ANGLE's standalone build, which has other requirements like a
full Visual Studio installation.

BUG=angleproject:2095

Change-Id: I785d87ecb5166d8f640a5c8a5f321c3209017cc5
Reviewed-on: https://chromium-review.googlesource.com/553399Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

WebGL CopyTexSubImage does not allow touching parts of the texture that
correspond to area outside the framebuffer, so we clip the read area to
the framebuffer.
The clipping also avoids problems with code lower down that isn't prepared
for read areas not entirely within the framebuffer.

Enable corresponding test.

BUG=angleproject:1815

Change-Id: I411223669dae2a456dfc3e22acda907b73177988
Reviewed-on: https://chromium-review.googlesource.com/527411
Commit-Queue: Frank Henigman <fjhenigman@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>

Ensure the underlying GL does not modify areas of the texture that
correspond to areas outside the framebuffer, as required for WebGL.

Enable corresponding test.

BUG=angleproject:1815

Change-Id: I6092d39e43868902de7ae3aee430deea3b3ff8a1
Reviewed-on: https://chromium-review.googlesource.com/538295
Commit-Queue: Frank Henigman <fjhenigman@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>

Add the member functions for saving and loading from the binary cache,
and hook them into the Program class. Requires that the Renderer
supports the program binary extension.

BUG=angleproject:1897

Change-Id: I2dc8d21b02da705ded58c5cd1943562c9c97c49b
Reviewed-on: https://chromium-review.googlesource.com/522874Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

Add tests for readPixels, copyTexSubImage2D and copyTexImage2D which
attempt to read outside the framebuffer boundary.  readPixels and
copyTexSubImage2D should not touch destination pixels which correspond
to pixels outside the framebuffer.  copyTexImage2D should write (0,0,0,0)
to those pixels.

BUG=angleproject:1815

Change-Id: I94042b5b08e319f28cb97d13613fe52514b67213
Reviewed-on: https://chromium-review.googlesource.com/452728
Commit-Queue: Frank Henigman <fjhenigman@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>

We will need these to implement a more secure version of hashing for the
program binary cache. These versions of lightly modified from the Chrome
versions to make compilation simpler.

BUG=angleproject:1897

Change-Id: Ibcadb56c2316e3f39655a07fa28b5fbd6103e452
Reviewed-on: https://chromium-review.googlesource.com/550000Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

This gives a very fast query time for handles that are within a fixed
range. For WebGL, where we don't allow create-on-bind, this will be
100% of the time, unless we create a very large number of resources.

It is implemented as a two-tier map - the first uses a flat array to
index into a handle buffer. The second tier uses a map for out-of-
range values.

BUG=angleproject:1458

Change-Id: I421bb3725cf523918cdfdbfaab035ad0dd3bf82d
Reviewed-on: https://chromium-review.googlesource.com/544684
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>

This reverts commit 3cd0dd37.

Reason for revert: crashes on NVIDIA Shield TV
https://build.chromium.org/p/chromium.gpu.fyi/builders/Android%20Release%20%28NVIDIA%20Shield%20TV%29/builds/1816

Original change's description:
> Don't expose non-conformant multisampling modes on GL
> 
> Some NVIDIA GL drivers expose non-conformant multisampling modes. The
> conformance of multisampling modes can be queried using the extension
> NV_internalformat_sample_query. Use it to filter out the
> non-conformant modes from the modes that are exposed by ANGLE.
> 
> The MAX_SAMPLES value and other similar values stored in caps also
> need to be lowered to match the maximum number of samples exposed
> for required formats.
> 
> There seems to be an NVIDIA driver bug related to querying
> STENCIL_INDEX8 multisample format. Work around this by querying
> DEPTH24_STENCIL8 instead.
> 
> There's also some confusion around whether RGB9_E5 should be
> renderable. Once the floating point texture extensions got rolled
> into the core GL spec, it was eventually made clear that RGB9_E5
> is intended not to be renderable. The extension specs that predate
> float textures in the core spec do suggest that it would be
> renderable, but in practice drivers that advertise the extension
> strings don't reliably implement RGB9_E5 as renderable. Solve this
> by disabling it as a renderable format and adding an explanatory
> comment.
> 
> BUG=chromium:682815
> TEST=angle_end2end_tests,
>      dEQP-GLES31.functional.state_query.internal_format.renderbuffer.*
> 
> Change-Id: I2218e3a23ea7b48a0615fea77a91897dc7d5fe9e
> Reviewed-on: https://chromium-review.googlesource.com/525515
> Reviewed-by: Geoff Lang <geofflang@chromium.org>
> Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>

TBR=geofflang@chromium.org,jmadill@chromium.org,cwallez@chromium.org,oetuaho@nvidia.com

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

Bug: chromium:682815
Change-Id: I1ebdf52c3fab1526f5a561ac4c8555e305ef2243
Reviewed-on: https://chromium-review.googlesource.com/551164Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Commit-Queue: Yuly Novikov <ynovikov@chromium.org>

This reverts commit c14348a2.

Reason for revert: crashes in murmurhash on Nexus 6
See https://build.chromium.org/p/chromium.gpu.fyi/builders/Android%20Release%20%28Nexus%206%29/builds/7865

Original change's description:
> Adds TUnorderedMap and uses it for tLevel in TSymbolTableLevel.
> 
> Change-Id: I27ba7a41c599ef6f7fe68b22c27bd2a40175ddf9
> Reviewed-on: https://chromium-review.googlesource.com/526672
> Commit-Queue: Jamie Madill <jmadill@chromium.org>
> Reviewed-by: Jamie Madill <jmadill@chromium.org>

TBR=jmadill@chromium.org,kbr@chromium.org,bajones@chromium.org,kainino@chromium.org,lethalantidote@chromium.org

Change-Id: Id4a428430c6d286b910790ba7c30503c98ce728f
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/551235Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Commit-Queue: Yuly Novikov <ynovikov@chromium.org>

Tests weren't properly destroying the compiler instance.

BUG=angleproject:2094

Change-Id: I65eb5a02ba741c6f48f09f03b84ded402581e89f
Reviewed-on: https://chromium-review.googlesource.com/550569Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Kenneth Russell <kbr@chromium.org>

On Qualcomm devices, they don't seem to correctly save transform
feedback info. Work around this by disabling caching on these devices.
This mirrors a Chromium workaround.

BUG=angleproject:2088

Change-Id: I6496d2fb6a03788379a6968bcd5eb3a9cb9d15d4
Reviewed-on: https://chromium-review.googlesource.com/549981
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>

This method can allow the implementation to override the Context's
workarounds. Use this design pattern now that we have access to the
gl::Context everywhere - we don't need to cache a local copy in the
Renderer objects.

This will be used to apply a Shader Program Cache workaround on the
GL level, that will only be used for the GLES back-end on Qualcomm.

BUG=angleproject:2088

Change-Id: I6da25c5c29c3ba01b8820c5234d1b92dd2d2121a
Reviewed-on: https://chromium-review.googlesource.com/549980Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

The multicontext test could spam thousands of lines of error text
when the test was broken. The test will still produce a lot of
errors when everything is broken, but it will produce a lot less.

BUG=angleproject:2088

Change-Id: Ia07e28897de3aba28cc8468acf27d5c9f56193a4
Reviewed-on: https://chromium-review.googlesource.com/549979Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

Change-Id: I27ba7a41c599ef6f7fe68b22c27bd2a40175ddf9
Reviewed-on: https://chromium-review.googlesource.com/526672
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>

New helper functions are added for collecting built-in variables, and
the traverser is encapsulated inside VariableInfo.cpp. The helper
functions get data for built-in variables from the symbol table, so a
duplicate copy of the data doesn't need to be maintained in
CollectVariables any more.

BUG=angleproject:2068
TEST=angle_unittests

Change-Id: I42595d0da0e5d4fb634a3d92f38db1dd6dd9efab
Reviewed-on: https://chromium-review.googlesource.com/549323Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>

BUG=angleproject:TBD

Change-Id: Icb19a685290f4313ad567391cab5152eda91a346
Reviewed-on: https://chromium-review.googlesource.com/544545Reviewed-by: Zhenyao Mo <zmo@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Zhenyao Mo <zmo@chromium.org>

This cap is only valid on desktop GL. There might be extensions
where the feature is available as well, so we should follow up
and check for the extensions as well.

This fixes a Debug runtime warning in almost every end2end_test
on GLES.

BUG=angleproject:2085

Change-Id: I5edc1c667b58230df903da82de2a8aceb0369c0c
Reviewed-on: https://chromium-review.googlesource.com/546597Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

This test was specifying a draw with two indices instead of six.
This wasn't producing any error on most configurations, but on
Android it was producing a driver error that was only visible in
Debug.

BUG=angleproject:2086

Change-Id: I7c3cee4cc10d6c37e3bac8ed9fbc16ecb2cb9e63
Reviewed-on: https://chromium-review.googlesource.com/546539
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>

Although this seems to compile and pass on our bots, the std::pair
constructor with arguments is not constexpr until c++14. Instead
use a helper struct which achieves the same goal.

BUG=chromium:697758

Change-Id: I0f9873729485a5059f79af969cb56f84706e6c98
Reviewed-on: https://chromium-review.googlesource.com/545796Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

BUG=angleproject:2082

Change-Id: I6f20502bac3c664d5ef8c6d65b244c37a5727f26
Reviewed-on: https://chromium-review.googlesource.com/545458Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>

BUG=angleproject:1458

Change-Id: Ib5c561610ab6dbcf0f65d915dfe8a8ca21ebe7f3
Reviewed-on: https://chromium-review.googlesource.com/544683Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

This allows caching the current surface more efficiently than at the
egl layer because we can take advantage of having only one backing
context.

BUG=angleproject:1651

Change-Id: I62867b16ac5e06901a988dc41a3d4812accdb74c
Reviewed-on: https://chromium-review.googlesource.com/543835
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>

Display WGL is the best place to track the currently bound surfaces and
contexts and cache them appropriately.  This results in a ~40% speed
increase in the WebGL Aqarium demo because wglMakeCurrent is now only
called once at initialization.

BUG=angleproject:1651

Change-Id: I61132bb4a0db8de592600173c20787c67d18e067
Reviewed-on: https://chromium-review.googlesource.com/543583
Commit-Queue: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>

The frequency of contexts switches is very slow compared to draw calls.
Instead of doing a map lookup, only store the completeness cache for the
last context used with the texture.

BUG=angleproject:2078

Change-Id: Ia24c891e1b5781b61fd463ce70e90d4b394c6f8a
Reviewed-on: https://chromium-review.googlesource.com/542946Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>

This patch refers to https://chromium-review.googlesource.com/c/380636/

BUG=angleproject:1987

Change-Id: If621eed6ecaa7298214843a2a133801ca1487b03
Reviewed-on: https://chromium-review.googlesource.com/462088
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>

Remove mUniformBlockBindings and move its bindings to mUniformBlocks.

BUG=angleproject:1442

Change-Id: I62b4471990a44e626d2357c41cb914abc27cb18f
Reviewed-on: https://chromium-review.googlesource.com/532834Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>