Chromium does not allow any third_party code to depend on base,
so the main test runner for swiftshader's tests in chromium can't
live inside the swiftshader repo. To solve this:

1) Added a test environment for swiftshader that will be used
for testing in chromium. Currently, it is simply empty.
2) Split unit tests in 2 files, unittests.cpp, which will
contain the tests ran by both chromium and swiftshader and
main.cpp, which will be used as the swiftshader test runner,
but NOT as the chromium test runner (that one will be added
in chromium at the same time I do the swiftshader update).
3) The BUILD.gn file was updated to make the chromium version
of the test depend on base and on the chromium version of the
swiftshader test runner (swiftshader_tests_main.cc, to be added).

Change-Id: I1128bb482565908bc285dcd6818d90d1d881a50e
Reviewed-on: https://swiftshader-review.googlesource.com/8409Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

PNaCl does not use the Microsoft x86-64 calling convention on Windows,
so the System V convention is the new default for Subzero. We need to
set a compile definition to explicitly request the use of the
Microsoft convention.

Change-Id: Ic70f5015d4b5753aa08a1247b6ac73eb9a9d278c
Reviewed-on: https://swiftshader-review.googlesource.com/8378Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

libX11 may have already been loaded (dynamically or statically) by the
application. Attempting to load it again could result in a different
version being loaded, causing various compatibility issues.

Bug b/32880157

Change-Id: Ica8e6b1c85b82469885a20dcef31e25e6b598132
Reviewed-on: https://swiftshader-review.googlesource.com/8348Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

CMake considers built-in configuration variables to be predefined, thus
setting CMAKE_BUILD_TYPE with a default value doesn't work because it
already exists. The FORCE attribute overrides it, but we have to guard
against overriding user-specified values.

Change-Id: Icf1cad6af15e788c5ae9ac8424f1ef0d29f9a1ff
Reviewed-on: https://swiftshader-review.googlesource.com/8377Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Bug b/34128224

Change-Id: I4aebcda840baa8ceef2ae99c98a80a83e32b89b3
Reviewed-on: https://swiftshader-review.googlesource.com/8376Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

This enables building with either LLVM or Subzero as the Reactor JIT
compiler back-end, on both Linux and Windows.

Change-Id: I4c052d224cd1302b7de412df58b07ee275ba924f
Reviewed-on: https://swiftshader-review.googlesource.com/8375Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>

Change-Id: I82b6a3f5336ca64dea30a8d9541fcf43c7ead81a
Reviewed-on: https://swiftshader-review.googlesource.com/8373Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Change-Id: I3ad40f5c0f9faf8aa27356b72b4d98763b9711d7
Reviewed-on: https://swiftshader-review.googlesource.com/8372Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Change-Id: I03c5ebf799af288558d08190058d03f1ac2922b7
Reviewed-on: https://swiftshader-review.googlesource.com/8355Reviewed-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Change-Id: Ib1339f5a40523007ca5832ed1bc7b7d096e6c1f2
Reviewed-on: https://swiftshader-review.googlesource.com/8374Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

This silences a benign assert in the config sorting operator which
checks for unique configs. On platforms other than Android, all of the
configs are marked as conformant.

Bug b/34029810

Change-Id: I600d67747ba24f153a0316609e5a783991093ebd
Reviewed-on: https://swiftshader-review.googlesource.com/8388Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>

The spec states that glViewport() silently clamps the viewport
width and height to GL_MAX_VIEWPORT_DIMS[0] and
GL_MAX_VIEWPORT_DIMS[1], respectively.

Bug b/34078120

Change-Id: Ifeec0d6b601ce8a3825796fa551eea1f46150002
Reviewed-on: https://swiftshader-review.googlesource.com/8371Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Rasterization of very large triangles was causing signed 32-bit
integer overflow due to multiplying two unsigned 12.4 fixed-point
coordinates. The equations have been reworked to only require
multiplication of 12.4 by 0.4 fixed-point.

Bug b/34078120

Change-Id: I227b81254559af04baf50fbfec6a7f123bd230e3
Reviewed-on: https://swiftshader-review.googlesource.com/8370Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Change-Id: Ibfd483ce3cba6ec036327b32cba1460d68f8c9e8
Reviewed-on: https://swiftshader-review.googlesource.com/3542Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>

The index used to index into a structure (a scalar) used to have the
vector size of the resulting type. This changed recently to always be
1, so the field type size needs to be determined from the fields
themselves, which is also the type of the indexing result.

Change-Id: I2dc373d8d31b02c0f69879cb0a3feacd83d6e473
Reviewed-on: https://swiftshader-review.googlesource.com/8368Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>

If VAOs are deleted starting from 0, then the
following happens when an app's context has
genned two VAO's that are both != 0,
and the first of the two nonzero VAOs
is the current one:

VAO 0
VAO 1 <- current
VAO 2

in context dtor loop over vao map:
delete vao 0 (done)
delete vao 1:
is current, so bind 0:
in bind 0, we create a new map entry since 0 was deleted
next loop iter deletes vao 0 again (done)
*** at this point, vao 0 pointer refers to freed memory ***
next loop iter wants to delete vao 2,
but the current vao is 0 and refers to freed memory.
then, in Context::deleteVertexArray:
if (getCurrentVertexArray()->name...) <- Segmentation fault (core dumped)

This CL deletes VAO 0 last.

Change-Id: Ifa606ad7517cd213f21606577d3bdd8d810b640d
Reviewed-on: https://swiftshader-review.googlesource.com/8350Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Lingfeng Yang <lfy@google.com>

Allow experimental access to OpenGL ES 3.0 for Android, when the
application explicitly sets the EGL_CONFIG_CAVEAT config attribute
to EGL_NON_CONFORMANT_CONFIG or EGL_DONT_CARE.

Bug b/34029810

Change-Id: I942a6d4812d89446f7045f020df974489c4c0ab3
Reviewed-on: https://swiftshader-review.googlesource.com/8352Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Attribute location wasn't working properly.
This faulty constructor explains why.

Change-Id: I7701ad316df0684ad02ed405bd2905d56a848bd6
Reviewed-on: https://swiftshader-review.googlesource.com/8328Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

A few things were failing when trying to use
GL_SAMPLE_ALPHA_TO_COVERAGE:
- The alpha test should not be skipped when
  GL_SAMPLE_ALPHA_TO_COVERAGE is set, otherwise
  no computation is performed.
- The alpha reference value was wrong
  (the alpha-to-coverage ramp is centered around it)

Change-Id: Ib9849868d267ca49fb3f0112192af8f207d34307
Reviewed-on: https://swiftshader-review.googlesource.com/8308Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Alexis Hétu <sugoi@google.com>

Change-Id: I6554202f899559903062155833d49fe43456149b
Reviewed-on: https://swiftshader-review.googlesource.com/8310Reviewed-by: Alexis Hétu <sugoi@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Bug swiftshader:23

Change-Id: Ifb2862e8358141f67a7974d3fa0a11e6fe41b904
Reviewed-on: https://swiftshader-review.googlesource.com/8290Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Bug swiftshader:27

Change-Id: Ia5f7da431902c3e87aab47b1dd388e05ced74cd3
Reviewed-on: https://swiftshader-review.googlesource.com/8274Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Bug swiftshader:27

Change-Id: I11238decf114381126a7465c462d918a3f16b0d8
Reviewed-on: https://swiftshader-review.googlesource.com/8273Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Bug swiftshader:27

Change-Id: I58259e00204550a397522fc26578c9f4d847f502
Reviewed-on: https://swiftshader-review.googlesource.com/8272Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Bug swiftshader:27

Change-Id: If085323dc6cc4325c6ff55c1021e98db94a75302
Reviewed-on: https://swiftshader-review.googlesource.com/8228Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

2 issues affected default attributes:
1) The stream type did not match the attributes' internal
   representation
2) The normalized flag was left uninitialized, meaning it was
   using whatever had been set in the previous draw call.

Change-Id: I25b425944e6f59206bf3ef4db35b56d26ef83168
Reviewed-on: https://swiftshader-review.googlesource.com/8292Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Change-Id: I09e3615399db4db256d94ba83d44a7b6b17ee2ec
Reviewed-on: https://swiftshader-review.googlesource.com/8291Reviewed-by: Alexis Hétu <sugoi@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Imported some of the more trivial bug fixes:
- Added a few missing interface block cases
- Added checks for varying structs
- Added checks for unsized arrays
- Added first-class array check for pre ES3 compilation
- Added check that ES3 functions do not use builtin names (ES3 only)
- Added more binary operator checks

Change-Id: I3d75453f17e1123478ef7da0998e869970a7fb7d
Reviewed-on: https://swiftshader-review.googlesource.com/8289Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

We were using Ice::Variable as the implementation type for Reactor's
abstract Value class only because shuffle operations required them.

Bug swiftshader:24

Change-Id: If87ab5f0b0bca5fbffe2df250ed03b7a1b1490c6
Reviewed-on: https://swiftshader-review.googlesource.com/8258Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Change-Id: I079991d257be4aa00a0aef938ccf0110cd005bcd
Reviewed-on: https://swiftshader-review.googlesource.com/8288Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Change-Id: I98853d4858136553be730b07b02db95d1800035c
Reviewed-on: https://swiftshader-review.googlesource.com/8275Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Bug swiftshader:27

Change-Id: Ic116a804fed80222ad9a41f219c937f28104f225
Reviewed-on: https://swiftshader-review.googlesource.com/8271Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

The use of constant pointers produces code that cannot be relocated.
They also cause issues in Subzero when offsetting them due to not having
constant folding support. We only used them for Direct3D cursor
rendering, which can just pass in the data as an argument instead.

Bug swiftshader:14

Change-Id: Id7f16c3fcaeed3fe64b569af6a49c32f6baec483
Reviewed-on: https://swiftshader-review.googlesource.com/8257Reviewed-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Change-Id: I1387cd9c1666bbb736f75d84679672f1b6964f48
Reviewed-on: https://swiftshader-review.googlesource.com/8270Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Change-Id: I2fbd6524f1975f2c76ae0b5e544f323e7c7e4537
Reviewed-on: https://swiftshader-review.googlesource.com/8269Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

A few things needed to be fixed:
- Removed unused local variables in Sampler.cpp
- Local tests showed that newly added files for ubsan build fix
  broke Mac and Windows builds. Moved files to Linux non debug
  only to fix the issue on all platforms.

Change-Id: I4d6d0d162603fdf36c581e84e177e6d042bf2d6e
Reviewed-on: https://swiftshader-review.googlesource.com/8268Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>

In order to build libEGL without explicitly setting a dependency
on the Renderer and Reactor projects, the Renderer's Surface class
must be linked with libEGL. That was causing an issue where the 2
Surface.so objects were colliding on Linux. In order to solve the
issue, libEGL/Surface.* was renamed to libEGL/EGLSurface.*

Change-Id: I2e230dd770be56fd29f7aecd5133183a7d2f20b5
Reviewed-on: https://swiftshader-review.googlesource.com/8254Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

We no longer support Code::Blocks, so removing the build files for it.
CMake can be used for Linux builds instead.

Change-Id: I1af29904078270898a3c07915cf32ca4ee4da25a
Reviewed-on: https://swiftshader-review.googlesource.com/8255Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Alexis Hétu <sugoi@google.com>

Change-Id: I54161aaeaa29fe26c246c61f2e27ccda5ef4a5f1
Reviewed-on: https://swiftshader-review.googlesource.com/8234Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Bug swiftshader:15

Change-Id: I2116fa6ad368c801e921becd89259b02b4ca68ce
Reviewed-on: https://swiftshader-review.googlesource.com/8251Reviewed-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Tested-by: Nicolas Capens <capn@google.com>