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7e28089b
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2025-07-31T18:44:01
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WGSL: support bvecs in uniforms
WGSL does not allow booleans in the uniform address space.
The last CL uses u32s to represent bools in the uniform address
space, and this CL uses vecN<u32> to represent bvecN.
Bug: angleproject:376553328
Change-Id: Ibf9f1fbf230ca03dd3d4661ba599e5fb1cb26ac4
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6808955
Reviewed-by: Liza Burakova <liza@chromium.org>
Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Commit-Queue: Matthew Denton <mpdenton@chromium.org>
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ca3d732d
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2025-07-24T16:22:31
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WGSL: support bool in uniforms
WGSL does not allow booleans in the uniform address space.
This CL changes the translator to substitute u32 for bool
in the uniform address space, and convert it to bool on use.
Arrays of bools are obviously arrays of u32s, and those
will need special conversion functions to convert the entire
array<u32> to array<bool> if necessary.
This also includes the optimization of an array<bool> in a
uniform--when indexing into it, only the indexed element
will be converted to a native bool, instead of converting
the entire array and then indexing.
Note that substituting u32 for bool matches std140, so this
change requires no changes to layout of uniforms.
Also note that WGSL really likes explicit casts, so there's
not really a way to avoid inserting explicit casts everywhere
when using u32.
Bug: angleproject:376553328
Change-Id: I8f72e55c6b401c28ff622622df7a450b7032721f
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6785609
Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Commit-Queue: Matthew Denton <mpdenton@chromium.org>
Reviewed-by: Liza Burakova <liza@chromium.org>
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b7582680
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2025-02-24T18:04:32
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Reland: GL: Allow untranslated shaders to pass through on GLES
Add an EGL extension EGL_ANGLE_create_context_passthrough_shaders which
uses the NULL translator and passes the original shader to the driver.
The parser is still used for shader reflection.
Always enable the null compiler backend. It has almost no binary size
cost and is now potentially used when the null ANGLE backend is not
enabled.
Bug: angleproject:398857482
Change-Id: Id528189ccbbacb1c444eacb151baadfda9fcc04b
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6488609
Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>
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5dd05578
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2025-04-14T07:34:57
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Revert "GL: Allow untranslated shaders to pass through on GLES"
This reverts commit 4e77552b86a89b449ada6d6c18f84285f5812b1d.
Reason for revert: breaks ChromeOS and fuzzers
Bug: angleproject:398857482
Original change's description:
> GL: Allow untranslated shaders to pass through on GLES
>
> Add an EGL extension EGL_ANGLE_create_context_passthrough_shaders which
> uses the NULL translator and passes the original shader to the driver.
> The parser is still used for shader reflection.
>
> Bug: angleproject:398857482
> Change-Id: I7c5fcc318c7e11931f78c08dcbf4764bf77d397d
> Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6297527
> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
> Commit-Queue: Geoff Lang <geofflang@chromium.org>
Bug: angleproject:398857482, angleproject:410423936
Bug: chromium:410114655, chromium:410100607, chromium:410121218
Bug: chromium:410052365, chromium:410290507, chromium:410178288
No-Presubmit: true
Change-Id: I45b01960637a1cda05d21a7df6d07465f6a8f5e9
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6448984
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Auto-Submit: Yuly Novikov <ynovikov@chromium.org>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Commit-Queue: Yuly Novikov <ynovikov@chromium.org>
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4e77552b
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2025-02-24T18:04:32
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GL: Allow untranslated shaders to pass through on GLES
Add an EGL extension EGL_ANGLE_create_context_passthrough_shaders which
uses the NULL translator and passes the original shader to the driver.
The parser is still used for shader reflection.
Bug: angleproject:398857482
Change-Id: I7c5fcc318c7e11931f78c08dcbf4764bf77d397d
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6297527
Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>
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00d99277
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2025-03-19T17:22:24
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[WGSL] Emit sampler types and texture lookup builtins
The split texture/sampler WGSL variables will now have the correct
types corresponding to their GLSL types.
Texture builtins are translated as faithfully as possible. There are
some issues with the translation:
1. Texture builtins using an implicit level-of-detail in a vertex
shader are supposed to sample from the base mip level. Right
now these are translated into WGSL functions that cannot be used
in a vertex shader at all.
2. Some texture builtins that take integer samplers do not have
corresponding WGSL versions, e.g. the sampling GLSL function
texture() takes integer samplers but the mostly equivalent
WGSL builtin, textureSample(), will only take float samplers.
3. A number of GLSL texture builtins are not supported in WGSL
when uses on shadow samplers, e.g. anything with a bias
parameter, an explicit LOD parameter, or explicit gradients,
Bug: angleproject:389145696
Change-Id: Idfd75721f88181db9643235b954629ac477163e4
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6372082
Commit-Queue: Matthew Denton <mpdenton@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Liza Burakova <liza@chromium.org>
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8ee72cc7
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2025-01-13T13:44:31
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WGSL: support matCx2 in uniforms
matCx2 in WGSL does not match std140 layout and so it needs to
be translated as array<ANGLE_wrapped_vec2, C> when in a uniform.
On use it needs to be converted to a WGSL-native matCx2.
This also includes the optimization of an array<matCx2> in a
uniform--when indexing into it, only the indexed element
will be converted to a native matCx2, instead of converting
the entire array and then indexing.
Bug: angleproject:376553328
Change-Id: I1d84471234b3d3cf4cf361ae89cb61675d5bf9a8
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6157788
Reviewed-by: Liza Burakova <liza@chromium.org>
Commit-Queue: Matthew Denton <mpdenton@chromium.org>
Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
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53ec86ab
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2024-12-17T14:40:31
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WGSL: support small stride arrays in uniforms
WGSL requires arrays in the uniform address space to have a stride
a multiple of 16.
This CL makes WGSL translator emit wrapper structs for array element
types used in the uniform address space, when the array stride is
not a multiple of 16. The exception is for structs that aren't
an aligned size of 16n, and for any types matCx2, since they are
(or will be) handled in different ways that ensure alignment to 16.
This should leave only f32, i32, u32, and vec2.
See https://www.w3.org/TR/WGSL/#example-67da5de6 for an example
of using a wrapper struct.
This requires converting arrays with a wrapper struct element type
to arrays with an unwrapped element type when they are first used;
this can be "optimized" later for the common case of accessing a
single array element, which can then be unwrapped immediately. This
CL generates WGSL conversion functions when necessary.
After this, the only types that can't yet be used in a uniform
are matCx2 and bools.
This is #2 in
https://docs.google.com/document/d/17Qku1QEbLDhvJS-JJ9lPQAbnuZtLxWhG-ha5eCUhtEY/edit?tab=t.0#bookmark=id.rt3slgehd4te
Bug: angleproject:376553328
Change-Id: I1edfa7f481a6cbf5b595643aae8728e67bc4b770
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6092038
Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Reviewed-by: Liza Burakova <liza@chromium.org>
Reviewed-by: Matt Denton <mpdenton@google.com>
Commit-Queue: Matt Denton <mpdenton@google.com>
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a6ee4641
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2024-09-25T11:41:47
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WGSL: Output default uniform block and accesses to it
Default uniforms are put into a WGSL struct, and all accesses
of those uniforms now output struct accesses.
Similarly to I/O vars and builtins, these are outputted in a
pre-pass, but in the future it might make sense to do what
Vulkan does and do an AST transformation to put the default
uniforms into a UBO which should be outputted similarly.
This does not handle bool, matCx2, or array of element size < 16.
Bug: angleproject:42267100
Change-Id: If29e2895a8aba3212b581813316af87273c1515c
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/5878759
Reviewed-by: Liza Burakova <liza@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Matthew Denton <mpdenton@chromium.org>
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