In OpenGL ES 3.0, the default framebuffer should use
GL_FRAMEBUFFER_DEFAULT instead of GL_RENDERBUFFER for
default buffer. I also added the Framebuffer::IsRenderbuffer()
utility function to make the transition easier.

Change-Id: I041e610738a4a656555ae7fa7ba41ba68b1fe9ea
Reviewed-on: https://swiftshader-review.googlesource.com/4763Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Unified and fixed packing and unpacking computations.

Change-Id: I1ea2bcf28945a9f105152a6836f11bcb2859750c
Reviewed-on: https://swiftshader-review.googlesource.com/4715Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

The original code allowed Renderbuffer objects to select
layer and level at construction time, but after that point
these parameters were not modifiable. This cl adds the code
to modify layer and/or level when requested.

Change-Id: Ic694904f83b794879110bd0505a36a011d79a2a5
Reviewed-on: https://swiftshader-review.googlesource.com/4765Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

The 2D Array texture binding query was stll using
TEXTURE_3D instead of using TEXTURE_2D_ARRAY.

Change-Id: Ib55007995c336e72aaae7fd62918f232a5c1c3fc
Reviewed-on: https://swiftshader-review.googlesource.com/4744Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

A few numbers didn't match between the default value entered
in Context.cpp and the constants from Config.hpp. A few default
values were also erroneously larger than required. Constants were
centralized in Config.hpp to solve the issue.

Change-Id: I60e5d93c43ce61e125c261bdf07ce50e7130a296
Reviewed-on: https://swiftshader-review.googlesource.com/4742Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Bug 27166315

Change-Id: Ia9774e6560b326ca963830c53e030487c239164a
Reviewed-on: https://swiftshader-review.googlesource.com/4770Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Bug 27157109

Change-Id: Ie477455d0b59a8432224f3956e2ba7a1140182af
Reviewed-on: https://swiftshader-review.googlesource.com/4767Reviewed-by: Greg Hartman <ghartman@google.com>
Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

- Quite a few buffers weren't being checked properly when a buffer
  was getting detached from the current context.
- Only current objects (TransformFeedback, VertexArray) should be
  affected by this.

Change-Id: I621c9fa45a951db5634616884cf57d5cb21d9bda
Reviewed-on: https://swiftshader-review.googlesource.com/4748Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

As long as there's no floating point arithmetic, 32 bit integer
types are computationally equivalent to 32 bit floating point.

Change-Id: I5ab19da440f52617a9bc64dff6fcaf8eff796aeb
Reviewed-on: https://swiftshader-review.googlesource.com/4717Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Mask queries could return negative values when only positive
values are accepted, so a clamp was added to prevent returning
negative values.

Change-Id: Ib151573fff54604567b83736163b8fe748c749f8
Reviewed-on: https://swiftshader-review.googlesource.com/4743Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Added immutable levels info to Texture and added the query.

Change-Id: I900a3c433dcc63b8113b1f623da3518c00680e16
Reviewed-on: https://swiftshader-review.googlesource.com/4751Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Specifying a read buffer or draw buffers was set on the context
instead of being set on the Framebuffer object, which led to
multiple Framebuffer objects wrongly sharing this state.

Change-Id: I9d137c52f50e58a48b95f7ed9a44b4dad275e710
Reviewed-on: https://swiftshader-review.googlesource.com/4745Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Added missing implementations for binding/start/size
related queries for TransformFeedback objects.

Change-Id: Iebfebdc840764755a74d4a3753f72eceb1e6c86e
Reviewed-on: https://swiftshader-review.googlesource.com/4747Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Implemented version query and removed a few unnecessary
UNIMPLEMENTED) calls.

Change-Id: I29bb53a8f8083a1b6fb091916dd156f47aac920c
Reviewed-on: https://swiftshader-review.googlesource.com/4754Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Sampler objects already exist, only the query was missing.

Change-Id: Iea4a65ee4af149a33b262eba4fc0d6256775d1e1
Reviewed-on: https://swiftshader-review.googlesource.com/4746Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Removed a few unnecessary/bad instructions from PixelProgram and
VertexProgram. Also added the proper implementation for printing out
a shader instruction that includes indexing an array with a uniform.

Change-Id: Icd37dd4f70419874bb65c54438409b8b9c3ee836
Reviewed-on: https://swiftshader-review.googlesource.com/4753Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Implemented binding/size/start related queries for uniform buffers.

Change-Id: I9d36c92201a7f0df86b1d882ca6d9f04b372bad6
Reviewed-on: https://swiftshader-review.googlesource.com/4750Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

A few things were missing in internal format queries
- GL_RGB and GL_RGBA are renderable formats
- Integer types have no multisampling
- If bufSize is 0, we should not write to the params output

Change-Id: If6ba2f28b368e780eca8e89ef033deacf9cc523b
Reviewed-on: https://swiftshader-review.googlesource.com/4752Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Added/fixed missing/bad storage texture types.

Change-Id: I0f489fbd21569114fe30d7291fb718de09cd8974
Reviewed-on: https://swiftshader-review.googlesource.com/4749Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Change-Id: I95aff944b1d38c297b3ece475717db4c77b3274d
Reviewed-on: https://swiftshader-review.googlesource.com/4736Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Bug 26776258

Change-Id: I326e76d2650b3992835d74baea159b13f14b2e3e
Reviewed-on: https://swiftshader-review.googlesource.com/4720Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

OpenGL ES 3.0 entry functions are exported in the exports.map version script,
but the source file defining them was not being compiled (ES3 support is still
disabled).

Change-Id: I5e42082304beb2b37de2bcc7ffcf3b2fc65ecc7d
Reviewed-on: https://swiftshader-review.googlesource.com/4732Reviewed-by: Keun Soo Yim <yim@google.com>
Reviewed-by: Greg Hartman <ghartman@google.com>
Tested-by: Keun Soo Yim <yim@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Timestamp macros make the build unreproducible. This is of particular concern
to Android, but since LLVM only uses them for command line operations which
we don't need at all, they can be disabled on all platforms.

Bug 27079084

Change-Id: I2c4c3dcd06feb3a64936e70ca1535f5a12816e95
Reviewed-on: https://swiftshader-review.googlesource.com/4730Reviewed-by: Keun Soo Yim <yim@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Unify address() and addressW() by introducing a new addressing mode.

Change-Id: I09f9cbbe7800cfd5ef737322d680327aeddd27f1
Reviewed-on: https://swiftshader-review.googlesource.com/4714Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

2D array textures use 2D LOD calculations, not 3D.

Change-Id: I0ce834bc4afb63dfeba3d9662105ffdaa07028da
Reviewed-on: https://swiftshader-review.googlesource.com/4716Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

2D array textures aren't supposed to filter between layers and the
computation used in the filtering code is meant to work with 3D
textures, not 2D array textures. The 2D array textures now use the
2D texture path instead of the 3D texture path to solve this issue.

Change-Id: Iea8fcfe67cce7ae70e39081af07e67fa59b268ff
Reviewed-on: https://swiftshader-review.googlesource.com/4690Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

- Only unbind (orphan and release) images when the texture destructs.
- Let images hold just one reference to the parent texture.
- Check if textures and images only reference each other and garbage collect.

Bug 26851951

Change-Id: I2b0bcc283bf545d948e91288c531eac7cc14d122
Reviewed-on: https://swiftshader-review.googlesource.com/4711Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Bug 26851951

Change-Id: I5494d61927eb4c1faff320aa7cd6cebe81800f29
Reviewed-on: https://swiftshader-review.googlesource.com/4712Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Customize construction for each use case.

Bug 26851951

Change-Id: Ic10166bbfeaf11e800fec2a6470446b76e49b825
Reviewed-on: https://swiftshader-review.googlesource.com/4710Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Bug 26851951

Change-Id: I5b594bdd34e6fa1074d5439ee2c09f6731839dee
Reviewed-on: https://swiftshader-review.googlesource.com/4534Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Change-Id: I0660f69ea463a117d950e85bc94facb8292a069f
Reviewed-on: https://swiftshader-review.googlesource.com/4713Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Vertex array objects are not allocated when generated,
but only when bound, so it's legal to have a null
vertex array object internally.

Change-Id: Ib28a388939e285425c09cfbc9f4efef3f4a8cead
Reviewed-on: https://swiftshader-review.googlesource.com/4700Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

The name for google image is "google_sdk_x86" on older Android versions.

Change-Id: If1e9cb368284b91787badf329e558af5d0b9042c
Reviewed-on: https://swiftshader-review.googlesource.com/4692Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Change-Id: I8215fabe92d11f0f28cae9ffadd8c48a3fbf1f27
Reviewed-on: https://swiftshader-review.googlesource.com/3890Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

There was some confusion between buffer mapping and size and offset
buffer binding arguments, which are distinct, but were represented
by the same Buffer class members. Added OffsetBindingPointer to solve
the issue and removed setOffset/setSize from the Buffer class, which
should not have existed in the first place (only the mapRange/unmap
functions should be allowed to modify these values, for now).

Change-Id: Iacecd17cfb90d0a229d9edf62a463c8acf31f07a
Reviewed-on: https://swiftshader-review.googlesource.com/4590Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

A few aspects of block declaration are improved upon here:
- Block definitions are computed and stored for later use.
  The data stored are the block member types and a map to
  convert from register offsets, based on the internal
  memory layout, to the std140 layout.
- Declaration of block members is possible. When a block
  member is declared prior to the entire block being
  declared, OutputASM::declareUniform() will first declare
  the whole block and return the index of the block member.
  If the block member is part of an already defined block,
  the function declares no new variables and returns the
  block member's register index.

Change-Id: If1368bc8de20a0f86169361d76858c3f3e34bb07
Reviewed-on: https://swiftshader-review.googlesource.com/4632Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Bug: 26822256

Change-Id: I2d974e1170847786369797d8e9b10ba4ad3663e0
Reviewed-on: https://swiftshader-review.googlesource.com/4660Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Greg Hartman <ghartman@google.com>

Some calls to the argument() function were made twice
because the emit() function didn't know what index to
use for each individual input. I added the function
arguments to the emit() function in order to solve that.

WebGL conformance tests pass.

Change-Id: I548b72cadf7247afd103b6be2ddfeaf39a995025
Reviewed-on: https://swiftshader-review.googlesource.com/4575Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

- The rowMajor qualifier should only be set for matrices
- Shared and std140 layouts are always considered active
- Fixed registerSize() for uniform blocks

Change-Id: Id0ccd4f1f1c3342915643d87e166234e61b83f4f
Reviewed-on: https://swiftshader-review.googlesource.com/4631Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

This cl contains the necessary changes to make uniform buffers
usable in shaders. A few things to note:
- Uniform buffers can be set, but nothing will attempt to access
  them in this cl.
- While the 'index' of uniforms is expressed in terms of registers,
  uniform buffer 'index' is expressed in bytes in both PixelProgram
  and VertexProgram. This is necessary because of packing which can
  potentially put some variables in the middle of registers.
  Technically, std140 always packs variables in multiples of byte4,
  but other future layouts may not, so using bytes as the unit is
  more future proof.
- The above mentioned 'index' will have to be computed in OutputASM
  and extra operations will need to be added (to fetch a row from a
  row major matrix, for example).

Change-Id: I636cc4bdc6fe90d6f5697e735f4288f48d18a75b
Reviewed-on: https://swiftshader-review.googlesource.com/4151Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>