* add GL_EXT_texture_shadow_lod feature detection
* allow more cases of cube depth texture sampling in glsl
* add test for sampling a cubemap array depth texture with lod
* add test for chosing GL_EXT_texture_shadow_lod over the grad workaround if instructed
* add changelog entry for GL_EXT_texture_shadow_lod
* fix criteria for requiring and using TEXTURE_SHADOW_LOD
* require gles 320 for textureSampling over cubeArrayShadow
* prevent false positives in TEXTURE_SHADOW_LOD in checks
* make workaround_lod_with_grad usecase selection less context dependant
* move 3d array texture error into the validator
* correct ImageSample logic errors
Without the suffix, `Expression::Literal(Literal::F32)` expressions
get written without any suffix on the number, meaning that they get
re-parsed as `AbstractFloat` values. In theory, this should always be
fine, but since we don't actually support abstract types yet in all
the places we should, having them appear in the output causes
validation problems.
See also: #4863, which did the same for `i32` literals.
Without the suffix, `Expression::Literal(Literal::I32)` expressions
get written without any suffix on the decimal number, meaning that
they get re-parsed as AbstractInt values. In theory, this should
always be fine, but since we don't actually support abstract types yet
in all the places we should, having them appear in the output causes
validation problems.
Apply the `NonUniform` decoration to the results of all access chains rooted in binding arrays that use non-uniform values as indices, regardless of the binding array's element type and address space. Previously, Naga only decorated non-uniform access chains for binding arrays of buffers.
Have `compact::compact` preserve entries in the `Module::types` arena
if they have names.
Future abstract type support will require the WGSL front end to
compact the module before validation. Without this change, that will
drop `alias` declarations, making it harder to test type validation.
Previously, implicit padding members of `struct`s were suppressed from
structure definitions in Metal output if they had a binding specified
for them (i.e., `@location(0)`). This padding is, however, is necessary
for correct access of member fields passed into shaders by uniform and
storage buffers. Unconditionally emit padding members for `struct`s.
Resolves
[`gfx-rs/wgpu`#4701](https://github.com/gfx-rs/wgpu/pull/4701).
Let `naga::TypeInner::Matrix` hold a full `Scalar`, with a kind and
byte width, not merely a byte width, to make it possible to represent
matrices of AbstractFloats for WGSL.
When asked to evaluate an `Expression::As` cast applied to a `Splat`
expression, change `ConstantEvaluator::cast` to preserve the `Splat`,
rather than expanding it out to a `Compose` expression.
