mirror of
https://github.com/encounter/dawn-cmake.git
synced 2025-07-10 15:15:58 +00:00
97668c8c37
Add `transform::DecomposeStridedMatrix`, which replaces matrix members of storage or uniform buffer structures, that have a [[stride]] decoration, into an array of N column vectors. This is required to correctly handle `mat2x2` matrices in UBOs, as std140 rules will expect a default stride of 16 bytes, when in WGSL the default structure layout expects a stride of 8 bytes. Bug: tint:1047 Change-Id: If5ca3c6ec087bbc1ac31a8d9a657b99bf34042a4 Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/59840 Reviewed-by: David Neto <dneto@google.com> Commit-Queue: Ben Clayton <bclayton@google.com> Kokoro: Kokoro <noreply+kokoro@google.com>
26 lines
605 B
WebGPU Shading Language
26 lines
605 B
WebGPU Shading Language
[[block]]
|
|
struct SSBO {
|
|
m : [[stride(16)]] array<vec2<f32>, 2>;
|
|
};
|
|
|
|
[[group(0), binding(0)]] var<storage, read_write> ssbo : SSBO;
|
|
|
|
fn arr_to_mat2x2_stride_16(arr : [[stride(16)]] array<vec2<f32>, 2>) -> mat2x2<f32> {
|
|
return mat2x2<f32>(arr[0u], arr[1u]);
|
|
}
|
|
|
|
fn mat2x2_stride_16_to_arr(mat : mat2x2<f32>) -> [[stride(16)]] array<vec2<f32>, 2> {
|
|
return [[stride(16)]] array<vec2<f32>, 2>(mat[0u], mat[1u]);
|
|
}
|
|
|
|
fn f_1() {
|
|
let x_15 : mat2x2<f32> = arr_to_mat2x2_stride_16(ssbo.m);
|
|
ssbo.m = mat2x2_stride_16_to_arr(x_15);
|
|
return;
|
|
}
|
|
|
|
[[stage(compute), workgroup_size(1, 1, 1)]]
|
|
fn f() {
|
|
f_1();
|
|
}
|