* Introduces builtin variables gl_SecondaryFragColorEXT and gl_SecondaryFragDataEXT
* Introduces builtin constant gl_MaxDualSourceDrawBuffersEXT
* enables support for layout qualifier "index" in es profile
GLSL Version : >= 150
Purpose:
Allow users to use features by enabling this extension, even in low versions.
Extension Name:
ARB_gpu_shader_fp64
Builtin-variables:
Nah
Builtin-functions:
functions overloaded for this extension, please check registry in reference.
Keywords:
Double
Features:
add support for type "double"
Reference:
https://www.khronos.org/registry/OpenGL/extensions/ARB/ARB_gpu_shader_fp64.txt
Add support for implicit conversion
1. Remove builtin double vertex (this is introduced by vertex_attrib_64bit
2. Add extension check and implicit conversion as double has been introduced
3. Add test results.
GLSL Version : >= 140
Purpose:
Allow users to use features by enabling this extension, even in low versions.
Extension Name:
ARB_texture_multisample
Builtin-variables:
Nah
Builtin-functions:
Nah
Keywords:
sampler2DMS, isampler2DMS, usampler2DMS,
sampler2DMSArray, isampler2DMSArray, usampler2DMSArray
Reference:
https://www.khronos.org/registry/OpenGL/extensions/ARB/ARB_texture_multisample.txt
Saved about 21K, size down to 380K of MSVC x86 code.
Fixed one bug that needs to be looked at on the master branch:
The test for needing a Vulkan binding has a bug in it, "!layoutAttachment"
which does not mean "no layoutAttachment", because that is non-zero.
This is why some test and test results changed.
Focus was on the front end (not SPIR-V), minus the grammar.
Reduces #ifdef count by around 320 and makes the web build 270K smaller,
which is about 90% the target size.
The grammar and scanner will be another step, as will the SPIR-V backend.
This makes heavy use of methods #ifdef'd to return false as a global way
of turning off code, relying on C++ DCE to do the rest.
Including spirv and AST tests
Also increase size of TBuiltInVariable bitfields since we've now exceeded 127
and add a static_assert to make this easier to find next time it happens!
including SPV generation using SPV_EXT_fragment_invocation_density.
This is an alias of the functionality in SPV_NV_shading_rate, and thus in some
cases we can only have one set of the tokens present (switch statements), so
we have picked the EXT version. This required updating the expected test
results for SPV_NV_shading_rate.
Also updated the known-good for spirv-headers so that the validator in
spirv-tools knows about the new extension.
