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a5d73ce965
This is a major reworking of this transform. The old transform code was getting unwieldy, with part of the complication coming from the handling of multiple return statements. By generating a wrapper function instead, we can avoid a lot of this complexity. The original entry point function is stripped of all shader IO attributes (as well as `stage` and `workgroup_size`), but the body is left unmodified. A new entry point wrapper function is introduced which calls the original function, packing/unpacking the shader inputs as necessary, and propagates the result to the corresponding shader outputs. The new code has been refactored to use a state object with the different parts of the transform split into separate functions, which makes it much more manageable. Fixed: tint:1076 Bug: tint:920 Change-Id: I3490a0ea7a3509a4e198ce730e476516649d8d96 Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/60521 Auto-Submit: James Price <jrprice@google.com> Kokoro: Kokoro <noreply+kokoro@google.com> Commit-Queue: James Price <jrprice@google.com> Reviewed-by: Ben Clayton <bclayton@google.com>
34 lines
1.3 KiB
Plaintext
34 lines
1.3 KiB
Plaintext
#include <metal_stdlib>
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using namespace metal;
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struct In {
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float none;
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float flat;
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float perspective_center;
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float perspective_centroid;
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float perspective_sample;
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float linear_center;
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float linear_centroid;
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float linear_sample;
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};
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struct tint_symbol_2 {
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float none [[user(locn0)]];
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float flat [[user(locn1)]] [[flat]];
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float perspective_center [[user(locn2)]] [[center_perspective]];
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float perspective_centroid [[user(locn3)]] [[centroid_perspective]];
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float perspective_sample [[user(locn4)]] [[sample_perspective]];
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float linear_center [[user(locn5)]] [[center_no_perspective]];
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float linear_centroid [[user(locn6)]] [[centroid_no_perspective]];
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float linear_sample [[user(locn7)]] [[sample_no_perspective]];
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};
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void tint_symbol_inner(In in) {
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}
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fragment void tint_symbol(tint_symbol_2 tint_symbol_1 [[stage_in]]) {
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In const tint_symbol_3 = {.none=tint_symbol_1.none, .flat=tint_symbol_1.flat, .perspective_center=tint_symbol_1.perspective_center, .perspective_centroid=tint_symbol_1.perspective_centroid, .perspective_sample=tint_symbol_1.perspective_sample, .linear_center=tint_symbol_1.linear_center, .linear_centroid=tint_symbol_1.linear_centroid, .linear_sample=tint_symbol_1.linear_sample};
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tint_symbol_inner(tint_symbol_3);
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return;
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}
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