Commit a8807cbf129e7dd5e5ac30cfa47a0153b6f9630d
2021-07-17T00:00:27
Vulkan: SPIR-V Gen: Support interpolateAt* The interpolateAt* builtins take their first argument as a pointer, so only the OpAccessChain result should be given to the corresponding SPIR-V instruction. A test is written in this change to handle interpolateAt* when given a swizzled lvalue, which is not representable in SPIR-V. This can be supported by having the AST transform: interpolateAtX(value.zy) to: interpolateAtX(value).zy which can be done right when the function is parsed and the AST node for it is created (by taking the swizzle out of the parameter and applying it to the node). However, swizzled lvalues as parameter to interpolateAt* is only allowed in desktop GLSL, and so the test is disabled. From the GLSL ES3.2 spec: > Component selection operators (e.g. .xy) may not be used when > specifying interpolant. Bug: angleproject:4889 Change-Id: I043969f22011e6171c7ae225ded3a5013e8cfa4e Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3035588 Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Tim Van Patten <timvp@google.com>