This is helpful for implementing program binary caching in ANGLE.

in order to maintain the current behaviour in Chrome, we will need
to defer shader compilation until link time. Since WebGL allows the
app layer to enable and disable extensions explicitly, the app can
enable or disable an extension between the calls to glCompileShader
and glLinkProgram. Then, if we're deferring shader compilation, we
will have to preserve the extension settings at the time of the call
to compile, not the current settings at the time of link. Making the
compiler reference-counted gives us a pretty simple and robust
solution.

This also changes the Context class to lazily init the shader
compiler. Lazy init prevents any unexpected nulls, and also ensures
the releaseShaderCompiler does exactly that: just releases the shader
compiler, and does not immediately re-initialize it.

BUG=angleproject:2044

Change-Id: I0f0eeb4eb94dc4eee238f92482804a0921c77df0
Reviewed-on: https://chromium-review.googlesource.com/522868Reviewed-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

Flex version is 2.6.4
Bison version is 3.0.4

BUG=chromium:668842

Change-Id: Ia05ae338c9b9e588534f8346ff5c59ed747c56bf
Reviewed-on: https://chromium-review.googlesource.com/435553Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

This introduces a helper type to act as the initialization data type
for input element arrays. A WrappedArray class acts as a helper class
to wrap a C array and size into a C++ class, similar to std::array
but without the data storage.

Also move resource deallocation memory counting into a single code
path.

BUG=angleproject:2034

Change-Id: I5e108254777f0df65f5f60fe26e760c71b95b542
Reviewed-on: https://chromium-review.googlesource.com/506775Reviewed-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

The unsized GL_RED and GL_RG formats are only usable with the
EXT_texture_rg extension and are always renderable.

BUG=720325

Change-Id: I813662f6c90f1a6a640be747ae40b81727e58cdc
Reviewed-on: https://chromium-review.googlesource.com/523023Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>

GL_CHROMIUM_color_buffer_float_rgb[a] allows these sized formats to be
used in TexImage2D even in ES2.  With this patch, the
conformance/extensions/oes-texture-float and
conformance/extensions/oes-texture-half-float tests now pass for WebGL1
and WebGL 2 contexts.

BUG=angleproject:1958

Change-Id: I568dea5da42ba310463d2690c3e764c48598311b
Reviewed-on: https://chromium-review.googlesource.com/522349Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>

WebGL adds two rules:
 - Fragment outputs declared but not written to should default to black.
 - FBO attachments for outputs not declared in the shader should not be
written to (it is UB in OpenGL ES).

Fix the first one by using the SH_INIT_OUTPUT_VARIABLES compiler
options, and the second one by messing with glDrawBuffers so that the
enabled draw buffers are always a subset of the ones declared by the
shader.

BUG=angleproject:2048

Change-Id: I1d851c190959c1acfc3e41d837e6990aec1d4086
Reviewed-on: https://chromium-review.googlesource.com/521682
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>

TEST=conformance/extensions/webgl-compressed-texture-s3tc-srgb
BUG=angleproject:2049

Change-Id: I00d816299db914c078d140f791cd7c98c6428a54
Reviewed-on: https://chromium-review.googlesource.com/522762Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>

BUG=angleproject:2012
TEST=conformance2/rendering/attrib-type-match

Change-Id: Ic282e0933a5c3c377322dd484534fcc1dfcb3840
Reviewed-on: https://chromium-review.googlesource.com/517974
Commit-Queue: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Frank Henigman <fjhenigman@chromium.org>

The resource manager factory methods will use ClearView or zero-filled
buffers to set initial data. It assumes there are no 3D depth/stencil
textures. This will lead to some wasteful re-creation of RTVs in some
cases.

This is a temporary measure until we can implement more efficient
lazy resource init strategies.

BUG=angleproject:1635

Change-Id: I590e76587d3d96a359beedb79e21d24930e5f2e0
Reviewed-on: https://chromium-review.googlesource.com/503254Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

In some cases we might have to call back into the GL layer, passing
the Context, and if we just have a ContextImpl pointer this isn't
possible. It also removes the need for SafeGetImpl.

BUG=angleproject:2044

Change-Id: I6363e84b25648c992c25779d4c43f795aa2866d6
Reviewed-on: https://chromium-review.googlesource.com/516835Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

Section 6.20 of the WebGL spec states that all shader-related entry points
that accept strings must validate that the string does not contain
characters that are not valid in ESSL.

TEST=conformance/misc/invalid-passed-params
BUG=2016

Change-Id: I220d9dd79c4b0e8e0195277093268b9e1e66f9d9
Reviewed-on: https://chromium-review.googlesource.com/519445
Commit-Queue: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>

Also correct the enum allocation to values that are available to ANGLE.

BUG=angleproject:1635

Change-Id: I443f5654aa6a5049b4a1ae4c253cd6473b4e446e
Reviewed-on: https://chromium-review.googlesource.com/520002
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>

If the context is lost due to an OUT_OF_MEMORY error, it was
impossible to check the error.

BUG=angleproject:1309

Change-Id: I50fbd46b139d44774dde804445f12b8d34d73e29
Reviewed-on: https://chromium-review.googlesource.com/521203Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>

This could happen if there was an error on device init.
Reported by Microsoft.

BUG=None

Change-Id: I059fd9308d0536b4120c28e684e37567d14b3fd5
Reviewed-on: https://chromium-review.googlesource.com/519642
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>

TEST=conformance2/rendering/fs-color-type-mismatch-color-buffer-type
BUG=angleproject:1688

Change-Id: I17848baf40b6d32b5adc1458fe2369b850164da3
Reviewed-on: https://chromium-review.googlesource.com/518246
Commit-Queue: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Frank Henigman <fjhenigman@chromium.org>

This test tears down and recreates GL and re-uses the binary in
a new GL context. Was meant to reproduce a bug in ANGLE, but the
bug had been fixed previously.

BUG=angleproject:2010

Change-Id: Ic3a31ac044ef4d794dae14608877b6958452b55e
Reviewed-on: https://chromium-review.googlesource.com/519463Reviewed-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

Instead pass it around via methods. This makes the code a bit nicer.

BUG=angleproject:2044

Change-Id: I721e190a2ecde2b1a65e57debf419ee06a5dce29
Reviewed-on: https://chromium-review.googlesource.com/516385
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>

This library comes from Chromium's base, and is useful for many use
cases in ANGLE. It can replace the custom MRU code we use in the
RenderStateCache. It will also be useful for implementing a program
binary cache.

BUG=angleproject:2044

Change-Id: Iba166fe380d7ed4e3123428b0227b9d299f756d1
Reviewed-on: https://chromium-review.googlesource.com/516384
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>

The binding point of uniform blocks can be specified in shaders with
this CL. See spec ESSL 3.10, section 4.4.4, page 58 for more info.

dEQP-GLES31.functional.ubo.* still can't completely pass as
the missing of arrays-of-arrays feature. Neither can
dEQP-GLES31.functional.layout_binding.ubo.* due to the incomplete
implementation of program interface APIs.

TEST=angle_end2end_tests:UniformBufferTest
BUG=angleproject:1442

Change-Id: If95d468fc109834a132b9b817730d3fdc3a615da
Reviewed-on: https://chromium-review.googlesource.com/483848
Commit-Queue: Jie A Chen <jie.a.chen@intel.com>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Olli Etuaho <oetuaho@nvidia.com>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>

Initializing globals is done by the DeferGlobalInitializers AST
transformation, which makes sure that the global variable init
proceeds in the correct order. This is important since some global
variables may use other uninitialized globals in their initializers.

The global variable init is only done in case the WebGL shader spec is
being followed. This avoids adding global initializers twice in case
the same shader goes through multiple translations, assuming only one
of them is a WebGL shader translation.

BUG=angleproject:1966
TEST=angle_end2end_tests, WebGL conformance tests

Change-Id: Iea701d3ae40edc906abd87303f2aa27fd23bf55a
Reviewed-on: https://chromium-review.googlesource.com/509689
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>

This was causing a very large performance regression in Texture
re-binding. Instead pass by const &, which should be fine, since
values in std::map (and unordered_map) are not reallocated when the
map changes.

Also make the SharedResource type non-copyable, and add an explicit
makeCopy method for when we need to clone the shared pointer.

BUG=angleproject:2034
BUG=chromium:727318

Change-Id: I39508a6ca4b41e4da31fe68899caa4464138cada
Reviewed-on: https://chromium-review.googlesource.com/517670
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>

Lift some test suppressions for bugs that have been fixed in the
NVIDIA driver a good while ago.

Also improve code style in some suppressions - prefer IsOSX() and
IsLinux() to using ifdefs.

BUG=angleproject:1305
TEST=angle_end2end_tests

Change-Id: Ia069f5b9696000c901956d2952801d5f5c339a11
Reviewed-on: https://chromium-review.googlesource.com/518168Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>

This will allow us to more easily take advantage of Chromium's
MRUCache class.

BUG=angleproject:2044

Change-Id: I3fad82fc825861dc1c2095f25da83159da76e76b
Reviewed-on: https://chromium-review.googlesource.com/517359Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

In some cases we would hash or memcmp against structs with bools or
other non-filled data. This could have implementation differences,
and may have been causing cache errors on Clang.

BUG=chromium:721648
BUG=angleproject:2044

Change-Id: I981a1e6e8d50a33f7fade568497b72b919accfce
Reviewed-on: https://chromium-review.googlesource.com/516383Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

Adds a CPU readback and conversion path when the destination texture is
not renderable.

BUG=angleproject:1932

Change-Id: I71461ca991dc10dd636ff38e1ae20db2be0f8d63
Reviewed-on: https://chromium-review.googlesource.com/508308
Commit-Queue: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>

Because of the platform refactor in abf38572 we broke the way
the tests override the D3D workarounds for the tiny depth/stencil bug.

This change passes a pointer to the platform directly in the EGL init
logic, which solves this issue. It also removes all decltype code in
the platform header which might fix the UBSAN problem we were seeing
previously.

Also change a present mode selection error into a warning in the Vk
back-end, since this was being triggered on AMD, but is safe.

BUG=angleproject:2042

Change-Id: Ibbd0c69ce11a840cf4b33c616f56020001e553aa
Reviewed-on: https://chromium-review.googlesource.com/513519Reviewed-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

This cleans up the allocation and deallocation of Blend, DepthStencil,
Rasterizer, and Sampler states.

This patch introduces a LazyResource2 class, basically a replacement
for LazyResource, which will be removed once the refactor is done.

BUG=angleproject:2034

Change-Id: I4fa759ae479807ff69a629f89a08b01800ba3f66
Reviewed-on: https://chromium-review.googlesource.com/503627
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>

Texture attachments need to validate that the attached mip level is within
the [baseLevel,maxLevel] range and that the texture is complete if the
attached mip level is not the base level.

BUG=722684

Change-Id: I859766506b295638572b75a0e2e9fed168be047a
Reviewed-on: https://chromium-review.googlesource.com/506928Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>

Guarantee that local variables are initialized before they are used
in GLSL output. In HLSL output all variables were already being
initialized.

Locals are initialized using an AST transform. The local variable init
can only be run after some simplification of the AST, so that it is
able to handle complex cases like:

for (int i[2], j = i[0]; i[0] < 3; ++i[0]) {
}

If we're dealing with ESSL 1.00 which lacks array constructors, in
this kind of case the uninitialized array initialization code needs to
be hoisted out of the loop init statement, and the code also needs to
make sure that j's initializer is run after i is initialized.

Another complex case involves nameless structs. This can be an issue
also in ESSL 3.00 and above:

for (struct { float f; } s; s.f < 1.0; ++s.f) {
}

Since the struct doesn't have a name, its constructor can not be used.
We solve this by initializing the struct members individually,
similarly to how arrays are initialized in ESSL 1.00.

Initializing local variables is disabled on Mac and Android for now.
On Mac, invalid behavior was exposed in the WebGL 2.0 tests when
enabling it. On Android, the dEQP test runs failed for an unknown
reason. Bugs have been opened to resolve these issues later.

BUG=angleproject:1966
TEST=angle_end2end_tests, WebGL conformance tests

Change-Id: Ic06927f5b6cc9619bc82c647ee966605cd80bab2
Reviewed-on: https://chromium-review.googlesource.com/504728
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>

We now allocate and release all buffer resources from a single place,
allowing us to allocate junk memory, clear on init, and track the
currently allocated buffer memory.

BUG=angleproject:2034

Change-Id: Id60b63a7f77bc369dfc494a7587ab06c8d34a8e2
Reviewed-on: https://chromium-review.googlesource.com/503253Reviewed-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

Re-land with protection against div-by-zero in samples compatibility
check.

BUG=722684

Change-Id: I3d5c310d1f2cb4d8b92d80492435855c3c4ad807
Reviewed-on: https://chromium-review.googlesource.com/517427Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>

Support is added according to the proposal for WEBGL_multiview. When
the multiview extension is enabled in an ESSL 1.00 shader, num_views
can be specified using a layout qualifier. To support this, enabling
the multiview extension makes "layout" a keyword rather than an
identifier in ESSL 1.00.

The type of gl_ViewID_OVR is also different in case of ESSL 1.00: it
has to be a signed integer, since unsigned integers are not supported
in ESSL 1.00.

Some existing tests for multiview shaders are extended in this patch.
The changes make sure that vertex shader "in" qualifier is still
allowed in ESSL 3.00 multiview shaders, since this patch adds code to
disallow it in ESSL 1.00 multiview shaders.

BUG=angleproject:1669
TEST=angle_unittests

Change-Id: I65dbbbebabdb24cf0bb647d40aa80cebf713c4f7
Reviewed-on: https://chromium-review.googlesource.com/506088Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>

This reverts commit ff77c359.

Reason for revert: Breaks FramebufferMixedSamplesTest on Android NVIDIA

BUG=angleproject:2045

Original change's description:
> Refactor multisample framebuffer completeness checks.
> 
> BUG=722684
> 
> Change-Id: Iebe6968ebd693e7f051394a040eac1cf6f539e6e
> Reviewed-on: https://chromium-review.googlesource.com/508221
> Reviewed-by: Geoff Lang <geofflang@chromium.org>
> Reviewed-by: Jamie Madill <jmadill@chromium.org>
> Commit-Queue: Geoff Lang <geofflang@chromium.org>
> 

TBR=fjhenigman@chromium.org,geofflang@chromium.org,jmadill@chromium.org
# Not skipping CQ checks because original CL landed > 1 day ago.
BUG=722684

Change-Id: I1abab021ba73b218cbbe60d4e7bfdaae56955c64
Reviewed-on: https://chromium-review.googlesource.com/517390Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>

This consolidates all texture allocation into ResourceManager11.
It removes a lot of error checking and resource management code.
In a few places we're storing some redundant information, like in
TextureStorage11, we might store the Format pointer in two places,
or the Texture's size.

BUG=angleproject:2034

Change-Id: I9369e76925a67632c444c662e5667c5ed7875547
Reviewed-on: https://chromium-review.googlesource.com/503252Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

Precision emulation rounding function calls and vector/matrix dynamic
indexing function calls now get a flag that indicates that running the
function body does not have side effects. This avoids triggering
asserts in OutputHLSL when these internal function calls end up on the
right hand side of a non-unfolded logical operator.

BUG=chromium:724870
TEST=angle_unittests

Change-Id: Id1a2b6b744f6a04c6cdb86a8f4109ccc12bc70b9
Reviewed-on: https://chromium-review.googlesource.com/516705Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>

BUG=722684

Change-Id: Iebe6968ebd693e7f051394a040eac1cf6f539e6e
Reviewed-on: https://chromium-review.googlesource.com/508221Reviewed-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>

BUG=chromium:723069

Change-Id: I2b3c9be297c2b65955e31f393756ca266cc7c60b
Reviewed-on: https://chromium-review.googlesource.com/514436Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

This will allow us to use EGLAttrib and pass pointers as Display
init parameters if necessary.

BUG=angleproject:2042

Change-Id: Ib0f85d71bc9d3dff2db9453012f40303f3c3bd7c
Reviewed-on: https://chromium-review.googlesource.com/513518Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

This will make staging texture tracking easier.

BUG=angleproject:2034

Change-Id: I2f0418cc5784100bf6fba59b4bda1b2dd9dc18d1
Reviewed-on: https://chromium-review.googlesource.com/503251Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

Some non-renderable texture formats remain unimplemented.

BUG=angleproject:1932

Change-Id: Id206432d6e26a70fc0e84478a4e43e9eefadcf2f
Reviewed-on: https://chromium-review.googlesource.com/491948
Commit-Queue: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>