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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>
57 lines
1.6 KiB
Plaintext
57 lines
1.6 KiB
Plaintext
#include <metal_stdlib>
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using namespace metal;
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struct Uniforms {
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/* 0x0000 */ float4x4 modelViewProjectionMatrix;
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};
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struct VertexInput {
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float4 cur_position;
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float4 color;
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};
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struct VertexOutput {
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float4 vtxFragColor;
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float4 Position;
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};
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struct tint_symbol_1 {
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float4 cur_position [[attribute(0)]];
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float4 color [[attribute(1)]];
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};
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struct tint_symbol_2 {
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float4 vtxFragColor [[user(locn0)]];
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float4 Position [[position]];
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};
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struct tint_symbol_4 {
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float4 fragColor [[user(locn0)]];
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};
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struct tint_symbol_5 {
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float4 value [[color(0)]];
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};
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VertexOutput vtx_main_inner(constant Uniforms& uniforms, VertexInput input) {
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VertexOutput output = {};
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output.Position = (uniforms.modelViewProjectionMatrix * input.cur_position);
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output.vtxFragColor = input.color;
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return output;
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}
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vertex tint_symbol_2 vtx_main(tint_symbol_1 tint_symbol [[stage_in]], constant Uniforms& uniforms [[buffer(0)]]) {
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VertexInput const tint_symbol_6 = {.cur_position=tint_symbol.cur_position, .color=tint_symbol.color};
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VertexOutput const inner_result = vtx_main_inner(uniforms, tint_symbol_6);
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tint_symbol_2 wrapper_result = {};
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wrapper_result.vtxFragColor = inner_result.vtxFragColor;
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wrapper_result.Position = inner_result.Position;
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return wrapper_result;
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}
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float4 frag_main_inner(float4 fragColor) {
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return fragColor;
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}
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fragment tint_symbol_5 frag_main(tint_symbol_4 tint_symbol_3 [[stage_in]]) {
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float4 const inner_result_1 = frag_main_inner(tint_symbol_3.fragColor);
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tint_symbol_5 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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