According to https://registry.khronos.org/OpenGL/specs/es/3.2/GLSL_ES_Specification_3.20.html#built-in-language-variables
> The variable gl_PointSize is intended for a shader to write the size of the point to be rasterized. It is measured in pixels. If gl_PointSize is not written to, its value is undefined in subsequent pipe stages.
- Write warn message if `ClipDistance` and `CullDistance` are used on unsupported version
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Co-authored-by: Teodor Tanasoaia <28601907+teoxoy@users.noreply.github.com>
Fixes#1745: Support out-of-order module scope declarations in WGSL
Fixes#1044: Forbid local variable shadowing in WGSL
Fixes#2076: [wgsl-in] no error for duplicated type definition
Fixes#2071: Global item does not support 'const'
Fixes#2105: [wgsl-in] Type aliases for a vecN<T> doesn't work when constructing vec from a single argument
Fixes#1775: Referencing a function without a return type yields an unknown identifier error.
Fixes#2089: Error span reported on the declaration of a variable instead of its use
Fixes#1996: [wgsl-in] Confusing error: "expected unsigned/signed integer literal, found '1'"
Separate parsing from lowering by generating an AST, which desugars as
much as possible down to something like Naga IR. The AST is then used
to resolve identifiers while lowering to Naga IR.
Co-authored-by: Teodor Tanasoaia <28601907+teoxoy@users.noreply.github.com>
Co-authored-by: Jim Blandy <jimb@red-bean.com>
* Add support for WGSL's `atomicCompareExchangeWeak` with the `__atomic_compare_exchange_result` struct, and add SPIR-V codegen for it.
Partially addresses https://github.com/gpuweb/gpuweb/pull/2113, #1755.
* Add tests for `atomicCompareExchangeWeak`, and support both u32 and i32 atomics with it.
* More thorough typechecking of the struct returned by `atomicCompareExchangeWeak`.
When lowering `Select` expressions the position could be wrongfully
updated from `AccessBase { constant_index: false }` to
`AccessBase { constant_index: true }` this caused dynamic indexing
in an array behind a structure to fail if it was stored in a constant.
Furthermore the position could also be updated from `Rhs` to
`AccessBase`, this could cause issues because `AccessBase` doesn't
load variables (which `Rhs` does), so accessing a member from a
structure behind a pointer would return the wrong result.
* fix(glsl-out,hlsl-out,msl-out): parenthesize unary negations a la `wgsl` everywhere
Unify parenthesization of unary negations across all backends with what the `wgsl` backend does,
which is `<op>(<expr>)`. This avoids ambiguity with output languages for which `--` is a different
operation; in this case, we've been accidentally emitting prefix decrements.
* build: update `rspirv` 0.11 -> 0.12 (FIXME: use upstream release)
* test: add `operators::negation_avoids_prefix_decrement` test
Co-authored-by: Dzmitry Malyshau <kvark@fastmail.com>
* Fix incorrect atomic bounds check on metal back-end
Generalize put_atomic_fetch to handle `exchange` as well, rather than special-cased code which didn't do the bounds check (the check handling as fixed in #1703 but only for the fetch cases, exchange was skipped).
Fixes#1848
* Add tests for atomic exchange
Compound assignments on wgsl follow the same semantics as their
underlying operation, this includes the splatting behavior when mixing
scalar and vector operands, which was done for binary operations but not
for compound assignments.
Previously the wgsl frontend wasn't aware of lexical scopes causing all
variables and named expressions to share a single function scope, this
meant that if a variable was defined in a block with the same name as a
variable in the function body, the variable in the function body would
be lost and exiting the block all references to the variable in the
function body would be replaced with the variable of the block.
This commit fixes that by using the previously introduced `SymbolTable`
to track the lexical and perform the variable lookups, scopes are pushed
and popped as defined in the wgsl specification.
Adds parsing support for methods on the glsl frontend, while `.length` is the only method in the base extensions, there might be more in extensions.
Adds support for the `.length` method and tests for it.
* Make some (currently hacky) changes to enable multiview in webgl
* Fix ViewIndex built in for this extension
* Run cargo fmt, fix tests
* Allow specifying if we're targetting webgl in the glsl version
* Document multiview2 extension
* fn embedded -> const fn embedded
* Fix tests
* Fix benches
* Add snapshot tests
* Revamp so that the glsl options have some multiview options. Also add tests
* Make clippy happier
* Go back to having is_webgl be part of Version
* Use wgsl as input for tests
* Rename Version::new_embedded to Version::new_gles, fix glsl validation
* Run cargo fmt
* Fix brand new clippy warnings
* [hlsl-out] fix matCx2 as global uniform
* [hlsl-out] update comments
* [hlsl-out] fix `row_major` not being written on global arrays of matrices and also write it on nested arrays of matrices
* [hlsl-out] fix matCx2's nested inside global arrays
* [hlsl-out] fix struct members of type array<matCx2>
* [hlsl-out] test mat2x4 to make sure our matCx2 code behaves properly
GLSL allows the last case of a switch statement to not have a `break`
statement causing it to be marked as fall-trough, naga's IR on the other
hand doesn't allow the last case to be fall-trough, this is fixed by
force marking it in the glsl frontend as not fall-trough.
GLSL also allows empty switch statements and without default cases,
naga's IR requires there be a default case, this is fixed by adding an
empty default case in the glsl frontend if no default case was present
in the switch statement.
Glsl defines two overloads for smoothstep that accept `min` and `max` as
scalars and the value as a vector, naga's IR is stricter and only allows
operators with the same dimensions, so this inputs must be splatted.
The previous check compared rows to rows and columns to columns but
multiplication of matrices only needs the columns of the left matrix to
be equal to the rows of the right matrix.
* glsl-out: Implement bounds checks for `ImageLoad`
* Enable image bounds check snapshot tests for GLSL.
In addition to the snapshot.rs changes, this entails adding an entry
point function to `bounds-check-image-restrict.wgsl` and
`bounds-check-image-rzsw.wgsl`, including appropriate data in the
param.ron files.
* Apply comments
Snapshot test changes:
Co-authored-by: Jim Blandy <jimb@red-bean.com>
