We sometimes generate local dirty bits in TextureGL. To make sure the local
dirty bits don't get skipped we use a Subject/Observer pattern between the
TextureGL and gl::Texture. This allows us to skip syncState in the hot path.

Also inlines a couple of other texture functions. And fixes a stray header
in EGLBlobCacheTest.

Bug: angleproject:2763
Change-Id: Ie1d8a5865deaf2a563a358c31ae28bef6b2458b1
Reviewed-on: https://chromium-review.googlesource.com/1228374
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>

In single-threaded cases we don't need to use a TLS lookup for the
current Context.

Assume a global context has 3 states: unset, set, and multi-threaded:

* global context unset -> set the global context
* global context set, matches TLS context -> set the global context
* global context set, doesn't match TLS -> set multi-threaded
* global context multi-threaded -> leave it

This also inlines the global context/TLS check into global_state.h.
Increases performance of the binding perf overhead test by up to 25%
and the draw call perf test by up to 3%.

Bug: angleproject:2824
Change-Id: Ib95953ca918f2408fe72ca83061f4e2d1bd1adad
Reviewed-on: https://chromium-review.googlesource.com/1231993
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>

These were already being signaled in the front end.

Bug: angleproject:2763
Change-Id: Id78d3d764e80e687c29c08395b59048d314bfbe2
Reviewed-on: https://chromium-review.googlesource.com/1204490Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

This patch is the third one to support atomic functions on D3D11.

In this patch we enable support for atomic function returns outside of
assignments (e.g. part of arithmetic operations or to index into arrays) and
when used directly initialize a variable.

Note that we are still missing the functionality to be tag loops with
[allow_uav_condition] as required by InterlockedCompareExchange.

BUG=angleproject:2682
TEST=angle_end2end_tests

Change-Id: Ia409ebb10621fd5c514cf6c76f366a320a9d9fc1
Reviewed-on: https://chromium-review.googlesource.com/1208317Reviewed-by: Bryan Bernhart <bryan.bernhart@intel.com>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>

An increased crash rate in rx::NativeWindow11Win32::createSwapChain has been
seen around the same time as this patch landed.  Speculatively reverting.

BUG=887403

This reverts commit a49f60fe.

Change-Id: Id1b08efbf47196f17f4a5e509a29f7d628b07b49
Reviewed-on: https://chromium-review.googlesource.com/1238884Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>

Have to call renderer->finish() before reading a buffer otherwise you can
get stale data.
Enable IndexBufferOffsetTest.UInt8Index/ES2_VULKAN which now works.
Disable LineLoopTest.LineLoopUShortIndexBuffer/ES2_VULKAN which stopped
working on Windows with Intel GPU.

BUG=angleproject:2659

Change-Id: I1e21b0e1dacd3368923caf18e767e34ab696eef6
Reviewed-on: https://chromium-review.googlesource.com/1227032
Commit-Queue: Frank Henigman <fjhenigman@chromium.org>
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>

This re-lands EXT_blend_func_extended implementation. A lot of the
implementation has been rewritten on top of changes that have been
done since the last attempt.

For now we only expose the extension on desktop GL. To support GLES,
we'd need to investigate what's the most robust way to handle the
compiler output and make the binding of the fragment outputs
conditional.

The extension is disabled on AMD and Intel because of test failures.

BUG=angleproject:1085
TEST=angle_end2end_tests

Change-Id: I619ae3162769b90aad095ddec158ce6c57a114a8
Reviewed-on: https://chromium-review.googlesource.com/1233713Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>

This check was not used. It applied only to rendering Feedback Loops.
The behaviour is undefined in non-WebGL and for WebGL we have a
separate validation check.

Also update the feedback loop tests to ignore the current GL states.
This change is based on feedback from the OpenGL ES working group.

Bug: angleproject:2763
Bug: chromium:763695
Change-Id: I9882b4f9af2d43fc7b5604ff36dadcc79dfd378f
Reviewed-on: https://chromium-review.googlesource.com/1228373
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>

A divisor >= 256 used to trigger an assert on the D3D11 backend since
it couldn't fit into the input layout cache. Increase the space
reserved for the divisor in the input layout cache to make sure that
the correct input layout will get used and to fix the assert.

BUG=angleproject:2832
TEST=angle_end2end_tests

Change-Id: I34eead6c4e8c4fea379bbafc8670b4e32a5b633b
Reviewed-on: https://chromium-review.googlesource.com/1236293Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>

We only need to call the syncState for samplers when they are dirty.
Also includes changes to refactor out the sampler sync in GL. Adds
observer bindings so sampler sync is handled correctly in resource
sharing scenarios.

Bug: angleproject:2763
Change-Id: I762f0738ee7572ae29ce6bd5384a30aa9588c848
Reviewed-on: https://chromium-review.googlesource.com/1227797Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

This patch is the first one in the series of supporting GLSL texture
function textureGather/textureGatherOffset on D3D11.

According to ESSL 3.1 SPEC (Chapter 8.9.3, Page 130), the definition
of textureGather on sampler2D is:
    gvec4 textureGather (gsampler2D sampler, vec2 P[, int comp])

The parameter "comp" is optional, and if it is specified, the value
of "comp" must be a constant integer expression with a value of 0, 1,
2, or 3, identifying the x, y, z, or w postswizzled component of the
four-component vector lookup result for each texel, respectively. If
comp is not specified, it is treated as 0.

According to the definition above, textureGather is equivalent to
Texture2D.Gather[Red|Green|Blue|Alpha] in HLSL, where we can use a
switch-case expression to choose the right HLSL texture function.

The features listed here will be implemented in the following patches:
1. Support textureGatherOffset
2. Support textureGather[Offset] on isamplers and usamplers
3. Support textureGather[Offset] on textures when swizzle is on
4. Support textureGather[Offset] on shadow samplers

BUG=angleproject:2826
TEST=dEQP-GLES31.functional.texture.gather.basic.2d.rgba8.*
     dEQP-GLES31.functional.texture.gather.basic.cube.rgba8.*
     (without texture_swizzle)
     dEQP-GLES31.functional.texture.gather.basic.2d_array.rgba8.*
     (without texture_swizzle)

Change-Id: Iff2ed4f8b65dad613cb0bafdfd19f8f0528e832c
Reviewed-on: https://chromium-review.googlesource.com/1232980
Commit-Queue: Jiawei Shao <jiawei.shao@intel.com>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>

Since this is about to be used for the Q release, and we haven't
receieved permission from the maps team to opt-in their app, we'll
switch to our team's test app.

Bug: angleproject:2794
Change-Id: Idbda050b1130c359cda68066f187aadeb8e949b5
Reviewed-on: https://chromium-review.googlesource.com/1236658
Commit-Queue: Ian Elliott <ianelliott@google.com>
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>

These are already passing.

Bug: angleproject:2644
Change-Id: Iac3452547e319a709e010431eb8a45f5523bb5f7
Reviewed-on: https://chromium-review.googlesource.com/1235653Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

This improves object binding performance. We no longer need to check
two containers when manipulating the bound subjects/observers.

Bug: angleproject:2763
Change-Id: I0ccb2e76be47bd8a28fba5a0c3eff857aa166bb7
Reviewed-on: https://chromium-review.googlesource.com/1227795
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>

Also update a test to trigger the bug.

Bug: angleproject:2763
Change-Id: I8e6735320a34dcc4cc8beee1b7a22b768912f24f
Reviewed-on: https://chromium-review.googlesource.com/1234338Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

The D3D11 backend used to crash to a null pointer dereference if a
glClearBuffer call was done on a nonexistent depth or stencil
attachment. Validate for these conditions so that the backend can't
crash in this case.

BUG=angleproject:2827
TEST=angle_end2end_tests

Change-Id: Iecee78d213d11d492d52f246b4b068e8b6f34244
Reviewed-on: https://chromium-review.googlesource.com/1233675Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>

Re-land fixes memory leak and adds inline to a few more methods.

This optimized vector keeps an initial fixed size storage but has
unbounded growth like a normal std::vector. It operates like a
FixedVector initially but then switches the storage to an allocated
pool when the element count exceeds the array limit.

This gives fast performance in the small case since no dynamic
allocation is needed. It also handles the "slow" big case.

Bug: angleproject:2763
Change-Id: Ib3cc7b652a14ed346528bf15820023ab0b5317ce
Reviewed-on: https://chromium-review.googlesource.com/1233453
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>

This is not needed and results in creating an empty command buffer.

Bug: angleproject:2818
Change-Id: I06e5542cb3cd819c18758c909b8fcb624b074874
Reviewed-on: https://chromium-review.googlesource.com/1232981Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Tobin Ehlis <tobine@google.com>

We add a novel multiview multisampling extension that includes the
requirement to explicitly resolve the multisampled framebuffer. The
explicit resolve is much more straightforward to implement on top of
OpenGL and D3D11 than implicit resolve found in the native extension
OVR_multiview_multisampled_render_to_texture. It also has predictable
performance characteristics.

The extension allows multiview drawing to 2D multisample texture
arrays and is now enabled on both the GL backend and the D3D11
backend. The implementation is fairly simple, as it involves just
small changes in validation to allow multisampled framebuffer
attachments. The multiview rendering logic is exactly the same
regardless of whether multisampling is enabled.

For the most part the same tests are used to test both multisampled
and non-multisampled rendering. The tests will use a different
framebuffer setup depending on the test param. They resolve the
multisampled framebuffer to a non-multisampled framebuffer prior to
any readbacks from the framebuffer.

Some of the tests are adjusted so that they have the correct sub-pixel
positioning of multisampled quads, so there won't be any pixels that
would be just partially covered.

The tests don't have any tolerance for partially covered pixels - if
we find any platforms where the tests run into a sub-pixel positioning
corner case, tolerance may need to be added later.

BUG=angleproject:2775
TEST=angle_end2end_tests

Change-Id: I590d7f300a92ea5439f2720d9db14a7976db2e1d
Reviewed-on: https://chromium-review.googlesource.com/1221214
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
Reviewed-by: Geoff Lang <geofflang@chromium.org>

Bug: angleproject:2825
Change-Id: I34a7c520d31cf0a9321d5599046159ef9bf58be5
Reviewed-on: https://chromium-review.googlesource.com/1232973
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>

This reverts commit 4d45e7dc.

Reason for revert: Memory leak detected during roll in https://ci.chromium.org/p/chromium/builders/luci.chromium.try/linux_chromium_asan_rel_ng/101750

Original change's description:
> Add FastVector for simple dynamic vector cases.
> 
> This optimized vector keeps an initial fixed size storage but has
> unbounded growth like a normal std::vector. It operates like a
> FixedVector initially but then switches the storage to an allocated
> pool when the element count exceeds the array limit.
> 
> This gives fast performance in the small case since no dynamic
> allocation is needed. It also handles the "slow" big case.
> 
> Bug: angleproject:2763
> Change-Id: I9c002b205bd4ac9fc171d1fdc42bc8ea5fe8dabe
> Reviewed-on: https://chromium-review.googlesource.com/1227794
> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
> Commit-Queue: Jamie Madill <jmadill@chromium.org>

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

Change-Id: Iaec76244cc736a8469b80bfc8534fb0fd6c49e11
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: angleproject:2763
Reviewed-on: https://chromium-review.googlesource.com/1232978Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Commit-Queue: Yuly Novikov <ynovikov@chromium.org>

For D3D11 backend, dirtybits are used to sync and update state
for compute.
For GL backend, mProgramUniformBuffersDirty,
mProgramAtomicCounterBuffersDirty, mProgramImagesDirty are newly
applied.

Bug: angleproject:2814

Change-Id: Ia459ca26705b7c685179d64e0c934535bf16741f
Reviewed-on: https://chromium-review.googlesource.com/1215245Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Jie A Chen <jie.a.chen@intel.com>

This changes to construct a new ShHandle of compiler for each Shader,
and use it to translate the shader source in a background thread.

Bug: chromium:849576

Change-Id: Ib49952c7292321ee6aa1c5996f8f7927f40d8f04
Reviewed-on: https://chromium-review.googlesource.com/1177195
Commit-Queue: Jie A Chen <jie.a.chen@intel.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>

This optimized vector keeps an initial fixed size storage but has
unbounded growth like a normal std::vector. It operates like a
FixedVector initially but then switches the storage to an allocated
pool when the element count exceeds the array limit.

This gives fast performance in the small case since no dynamic
allocation is needed. It also handles the "slow" big case.

Bug: angleproject:2763
Change-Id: I9c002b205bd4ac9fc171d1fdc42bc8ea5fe8dabe
Reviewed-on: https://chromium-review.googlesource.com/1227794Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

This adds a custom logging step to DisplayAndroid and DisplayVkAndroid.
It's easiest to add to these two classes since we have no common info
logging code and other platforms may not want startup spam. It would
also be possible to put this into debug info hooks.

Bug: angleproject:2823
Change-Id: I12a1ea9e27880648d8a73a9e3faa56f318620cbe
Reviewed-on: https://chromium-review.googlesource.com/1230273Reviewed-by: Ian Elliott <ianelliott@google.com>
Reviewed-by: Cody Northrop <cnorthrop@google.com>
Commit-Queue: Cody Northrop <cnorthrop@google.com>

Slight performance increase in binding related tests.

Bug: angleproject:2763
Change-Id: I4d14177adab678d596cd34b8f1b99f5309f017f0
Reviewed-on: https://chromium-review.googlesource.com/1227793
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>

Re-land fixes memory leaks.

Using a custom array instead of std::vector speeds up the resource
manager. One reason is because calls to size() are implemented in many
implementations as a difference between two pointers. This sub size
implementations are slower than storing a simple size variable in a
custom class.

Also includes more inlining of hot spots functions.

Also includes a small unit test class for ResourceMap. And an unrelated
but small test fix for TextureLimisTest. Also a small unrelated fix for
a Transform Feedback test.

Increase the scores of the draw call perf test with texture and buffer
bindings and the buffer binding perf test.

Bug: angleproject:2763
Change-Id: Ic2f0f689107b2bf05c63da2ed6bbc9f0feea63f7
Reviewed-on: https://chromium-review.googlesource.com/1229033Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

BUG=angleproject:2270
TEST=angle_end2end_tests.ComputeShaderTest.DispatchComputeIndirect/ES3_1_D3D11

Change-Id: I29bd888ce1e7e3e09b5635699a36164cd97cd7de
Reviewed-on: https://chromium-review.googlesource.com/1209563Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Jie A Chen <jie.a.chen@intel.com>

Cannot have package name with 'google' in it, it is not dependent
on Google, ANGLE is an open source project.

Bug=angleproject:2418

Change-Id: If69be10b2d60789d0cce30b631249927026c5c0e
Reviewed-on: https://chromium-review.googlesource.com/1229434Reviewed-by: Cody Northrop <cnorthrop@google.com>
Commit-Queue: Cody Northrop <cnorthrop@google.com>

This reverts commit 57ff6f95.

Reason for revert: Memory leaks detected during roll in https://ci.chromium.org/p/chromium/builders/luci.chromium.try/linux_chromium_asan_rel_ng/100284

Original change's description:
> Inline and micro-optimize more for perf tests.
> 
> Using a custom array instead of std::vector speeds up the resource
> manager. One reason is because calls to size() are implemented in many
> implementations as a difference between two pointers. This sub size
> implementations are slower than storing a simple size variable in a
> custom class.
> 
> Also includes more inlining of hot spots functions.
> 
> Also includes a small unit test class for ResourceMap. And an unrelated
> but small test fix for TextureLimisTest. Also a small unrelated fix for
> a Transform Feedback test.
> 
> Increase the scores of the draw call perf test with texture and buffer
> bindings and the buffer binding perf test.
> 
> Bug: angleproject:2763
> Change-Id: I41c327987db27ac45e6a62579f01e1cdc22e396c
> Reviewed-on: https://chromium-review.googlesource.com/1171510
> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
> Reviewed-by: Jamie Madill <jmadill@chromium.org>
> Commit-Queue: Jamie Madill <jmadill@chromium.org>

TBR=fjhenigman@chromium.org,ynovikov@chromium.org,jmadill@chromium.org,syoussefi@chromium.org

Change-Id: Ie047289c9bf23a842c3cbb9692c811da0534991c
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: angleproject:2763
Reviewed-on: https://chromium-review.googlesource.com/1228893Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Commit-Queue: Yuly Novikov <ynovikov@chromium.org>

Support for multisampled EGL surfaces was added in
151d5de6 (2017-04-13, "Enable MSAA for texture client buffers")
but the resolve step was missing because it was not needed for
EGL_ANGLE_d3d_texture_client_buffer. However, when using MSAA
with a regular EGL surface then resolving is required to get
an antialiased image.
Please note that the new test case CreateSurfaceWithMSAA does
actually not test the newly added resolve step because the
resolve is performed by the glReadPixels() call there.
So it is rather a general test if MSAA works for EGL surfaces.

TEST=angle_end2end_tests.EGLSurfaceTest.CreateSurfaceWithMSAA

Change-Id: Ieafd6877fa510d5e16c0d9c6872c31fa73efa86c
Reviewed-on: https://chromium-review.googlesource.com/1181138Reviewed-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>

Using a custom array instead of std::vector speeds up the resource
manager. One reason is because calls to size() are implemented in many
implementations as a difference between two pointers. This sub size
implementations are slower than storing a simple size variable in a
custom class.

Also includes more inlining of hot spots functions.

Also includes a small unit test class for ResourceMap. And an unrelated
but small test fix for TextureLimisTest. Also a small unrelated fix for
a Transform Feedback test.

Increase the scores of the draw call perf test with texture and buffer
bindings and the buffer binding perf test.

Bug: angleproject:2763
Change-Id: I41c327987db27ac45e6a62579f01e1cdc22e396c
Reviewed-on: https://chromium-review.googlesource.com/1171510Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

Currently we limit the maximum of State bits to 64 for performance
consideration. To accommodate new ES31 states, we have to pick and
squash some existing bits which are less hot.

Bug: angleproject:2814

Change-Id: I8fc19286bbf8d8273949da8d986a8b1587fa105e
Reviewed-on: https://chromium-review.googlesource.com/1227069Reviewed-by: Jie A Chen <jie.a.chen@intel.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jie A Chen <jie.a.chen@intel.com>

This change adds shader type checking before entering
initializeOutputVariables.

BUG: angleproject:2821
Change-Id: Ib931031f2fc187f1f2a1821a09664bbe172a5e90
Reviewed-on: https://chromium-review.googlesource.com/1226229
Commit-Queue: Jiajia Qin <jiajia.qin@intel.com>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>

glBufferSubData is calling vkMapMemory with a size of zero is invalid.
Check for that and exit early if found.

Bug: angleproject:2790

Change-Id: I965badeb3aa2cec1adc24dd7ff5695f8aa3e553d
Reviewed-on: https://chromium-review.googlesource.com/1194610
Commit-Queue: Courtney Goeltzenleuchter <courtneygo@google.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>

This removes the temporary defines now that Chromium is up-to-date.

Bug: angleproject:2806
Change-Id: I8e3308d6b80e49c2b2a7a698ee5d8ad40f442475
Reviewed-on: https://chromium-review.googlesource.com/1227031Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

These were both missing the correct layer offset. Cache the layer
inside the RenderTargetVk for easy access.

Bug: angleproject:2470
Change-Id: I690dbf0702d7ec52f44ba0a9429b6ef0e51baf6b
Reviewed-on: https://chromium-review.googlesource.com/1225910
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>

Bug: angleproject:2763
Change-Id: Idcb8a714a6dccdff3dd953679e17a7314866a37d
Reviewed-on: https://chromium-review.googlesource.com/1214206
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Reviewed-by: Frank Henigman <fjhenigman@chromium.org>

Is much faster for completeness cache checks in syncProgramTextures.

Bug: angleproject:2763
Change-Id: Iffdacbb8a4f6640caa5051643c379a7b4c3311b6
Reviewed-on: https://chromium-review.googlesource.com/1171508
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>

This will more easily allow us to use a cached completeness comparison
value. The cached value only gets updated on certain setters.

Bug: angleproject:2763
Change-Id: Ib80db8517560617087ae8360f7af69d6c2392b76
Reviewed-on: https://chromium-review.googlesource.com/1171507Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Reviewed-by: Frank Henigman <fjhenigman@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>