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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>
37 lines
894 B
Plaintext
37 lines
894 B
Plaintext
#include <metal_stdlib>
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using namespace metal;
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struct tint_symbol {
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float4 value [[position]];
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};
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struct tint_array_wrapper {
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float2 arr[3];
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};
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struct tint_symbol_1 {
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float4 value [[color(0)]];
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};
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float4 vtx_main_inner(uint VertexIndex) {
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tint_array_wrapper pos = {.arr={float2(0.0f, 0.5f), float2(-0.5f, -0.5f), float2(0.5f, -0.5f)}};
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return float4(pos.arr[VertexIndex], 0.0f, 1.0f);
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}
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vertex tint_symbol vtx_main(uint VertexIndex [[vertex_id]]) {
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float4 const inner_result = vtx_main_inner(VertexIndex);
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tint_symbol wrapper_result = {};
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wrapper_result.value = inner_result;
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return wrapper_result;
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}
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float4 frag_main_inner() {
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return float4(1.0f, 0.0f, 0.0f, 1.0f);
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}
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fragment tint_symbol_1 frag_main() {
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float4 const inner_result_1 = frag_main_inner();
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tint_symbol_1 wrapper_result_1 = {};
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wrapper_result_1.value = inner_result_1;
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return wrapper_result_1;
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}
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