tree 99f0653b2196dd3f5c6c9fbc59b5949da1113249
parent 6d643deefa48764c84111689c58668c84a37fb5e
author Stephen White <senorblanco@chromium.org> 1636999314 +0000
committer Tint LUCI CQ <tint-scoped@luci-project-accounts.iam.gserviceaccount.com> 1636999314 +0000

GLSL: implement texture sample and store functions.

Change all the texture types to the GLSL equivalents. Note that some
types don't actually exist in GLSL ES, e.g., 1D textures, but this
will be handled later.

Change all the texture functions from HLSL-style to GLSL (e.g.,
texture.Sample(...) -> texture(texture, ...). Note that depth
comparison functions are probably wrong.

Implement writeonly storage texture type and functions.

Samplers are skipped entirely in the GLSL backend, with the assumption
that they will already have been combined into GLSL-style combined
samplers and textures by the client code.

Move the SingleEntryPoint transform above the RemovePhonies pass. This
ensures that texture variables are not optimized out. (Otherwise some
tests produce valid but not very useful results.)

Add the builtin-functions to the GLSL keywords list for renaming.
They're not keywords, but they can't be identifiers either.

Bug: tint:1298, tint:1299

Change-Id: I86c4547fcdd1eba80be98f6c05b939f345fd4c3e
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/69200
Commit-Queue: Stephen White <senorblanco@chromium.org>
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>