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>

Register indices were only set for the first instance of the array
when the uniform block array was present in both the fragment and
vertex shaders, so this code takes care of the array case.

Change-Id: I8a98470fedcc67bdc5edfd3b852470f5f911d610
Reviewed-on: https://swiftshader-review.googlesource.com/4630Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Bug 26794307

Change-Id: I0aa175f091550d544a33503b602c191353e7a1c5
Reviewed-on: https://swiftshader-review.googlesource.com/4606Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Bug 26794307

Change-Id: I66a440221435e63574c5da4204a9d2b00ece73f4
Reviewed-on: https://swiftshader-review.googlesource.com/4604Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Change-Id: If557db7db89659e6c2b043b21e5712fb34eafd8d
Reviewed-on: https://swiftshader-review.googlesource.com/4561Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Change-Id: Ida83136a083642bd6cd651c4cb506723e8ac9a41
Reviewed-on: https://swiftshader-review.googlesource.com/4570Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Bug 22652760

Change-Id: I698ce910ee4302178d7235fa316aaa2b268e71a8
Reviewed-on: https://swiftshader-review.googlesource.com/4560Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Bug 22652760

Change-Id: I50c6935bac91f586953b0dd2abd0d2a859468ee1
Reviewed-on: https://swiftshader-review.googlesource.com/4579Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Bug 22652760

Change-Id: I317275cd2c15012da3a859735409af07ea9b2923
Reviewed-on: https://swiftshader-review.googlesource.com/4559Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Bug 22652760

Change-Id: If6bf124c3218847ecc4af0ae16102452a6b344d9
Reviewed-on: https://swiftshader-review.googlesource.com/4558Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Bug 22652760

Change-Id: I48e9e1f3ff677429eff1aea2f80b1e384a537a14
Reviewed-on: https://swiftshader-review.googlesource.com/4557Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Change-Id: I7da54053b3be31b4388dd9c0f4d89298e656bee2
Reviewed-on: https://swiftshader-review.googlesource.com/4556Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Change-Id: I99731b6697a4ae92b1d04c8a8d895a0cf19d580c
Reviewed-on: https://swiftshader-review.googlesource.com/4545Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Bool to int and int to bool also work for unsigned int.

Change-Id: I31669d8754a718096381609d13c2e9668599efe5
Reviewed-on: https://swiftshader-review.googlesource.com/4070Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Change-Id: I9630093a14d0c1b2b6dc60ffb5866c7d2eaf4f02
Reviewed-on: https://swiftshader-review.googlesource.com/4552Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Change-Id: If7524c5245951ed87bcb8caacda2264db0875dad
Reviewed-on: https://swiftshader-review.googlesource.com/4554Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Replaced a few instances of 224 and 256 that were actually used to
represent FRAGMENT_UNIFORM_VECTORS and VERTEX_UNIFORM_VECTORS.

This cl should not change any behavior.

Change-Id: I4b82341f32223fcee559aaf70df2ee83c9936d11
Reviewed-on: https://swiftshader-review.googlesource.com/4547Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Bug 22652760

Change-Id: If2b41c4d3b24f4b8a9d9dd805a9ab3ce724b7726
Reviewed-on: https://swiftshader-review.googlesource.com/4553Reviewed-by: Alexis Hétu <sugoi@google.com>
Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Bug 22652760

Change-Id: I1a8ff978fdc7ad795e469218a931523d624e7cde
Reviewed-on: https://swiftshader-review.googlesource.com/4546Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Change-Id: I8bc812cd6c25a60dc73abc2177e8eb4a3841af21
Reviewed-on: https://swiftshader-review.googlesource.com/4551Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Change-Id: I3d4262ea4be0c7b1128b2ca410e985cc6f58c9c9
Reviewed-on: https://swiftshader-review.googlesource.com/1970Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Change-Id: If36ea6e74311f54bb4c2b0bc1b5b7ccd0e97d74b
Reviewed-on: https://swiftshader-review.googlesource.com/4548Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Change-Id: I539fcaa5b7853ac618f3d27027d3357bc6e620ba
Reviewed-on: https://swiftshader-review.googlesource.com/1960Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Added Angle's std140 encoder to properly compute sizes and
offsets of uniform blocks for the std140 standard. All
layouts currently use std140 ('packed' and 'shared' are
implementation dependent, so we can choose to have them be
the same as std140).

All uniform blocks made of simple types or arrays of simple
types are properly interpreted by this code.

Structs are still TBD.

Change-Id: I191d7f313db5d409715b1101ea70903a7b958726
Reviewed-on: https://swiftshader-review.googlesource.com/4525Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Working on uniforms, I realized that there was a large
amount of code duplication in the applyUniform* functions,
so I create a basic applyUniform() to contain common code
between all these functions, which reduces the size of
Program.cpp by about 275 lines, or about 10% of that file.

Change-Id: I0f013821e1cc8f507bb4d6829b0097fc41420e6d
Reviewed-on: https://swiftshader-review.googlesource.com/4527Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Blocks are also symbols, so when we have a block,
we have to look for blocks instead of symbols.

Change-Id: I683e646c2c63754a0b27b299dfdbc1d87017fb99
Reviewed-on: https://swiftshader-review.googlesource.com/4542Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

A uniform block's qualifier is generally a uniform, so
we have to change that to a temporary in order to be
able to us it as the result of the indexing operation.

Change-Id: I2f5ba7f966e8eaab314322edfa0483a9f24bfbdb
Reviewed-on: https://swiftshader-review.googlesource.com/4543Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Uniform blocks can be neither scalars not registers,
so make sure these never return true for uniform blocks.

Change-Id: Ib00afd175e4df92d45fe1aeaca865ea45fc13b0b
Reviewed-on: https://swiftshader-review.googlesource.com/4544Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Bug 15387371

Change-Id: Id4c9b54c5c0b4115479b6710c4d8c91d34e5c002
Reviewed-on: https://swiftshader-review.googlesource.com/4494Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Bug 21305111

Change-Id: I3803f274f25a25ec60f0f5cbfc4af0151f39ad04
Reviewed-on: https://swiftshader-review.googlesource.com/4505Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Bug 26486408

Change-Id: Iec34ee0034695950163e8e40082d1ad7128490f8
Reviewed-on: https://swiftshader-review.googlesource.com/4533Reviewed-by: Alexis Hétu <sugoi@google.com>
Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

Change-Id: If93cfd390846e26348a6f30a85d340d4df57e891
Reviewed-on: https://swiftshader-review.googlesource.com/4532Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Change-Id: I668c4295fd13d028fa53f6aa75ac6c6d4c6de44f
Reviewed-on: https://swiftshader-review.googlesource.com/4531Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Bug 15387371

Change-Id: I771b6e9f30669aade18eba8b3749fcb71ae8ef97
Reviewed-on: https://swiftshader-review.googlesource.com/4501Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Bug 15387371

Change-Id: I01bf5327f205bf646c51c1bb06560448a09f6c4a
Reviewed-on: https://swiftshader-review.googlesource.com/4526Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

Bug 15387371

Change-Id: Ic5374735e6ca386e871848c34890272c1259c273
Reviewed-on: https://swiftshader-review.googlesource.com/4496Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>