Commit ca3d732d11d5394d9957660fc9aed48889c22166
2025-07-24T16:22:31
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>