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https://github.com/encounter/dawn-cmake.git
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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>
63 lines
2.0 KiB
HLSL
63 lines
2.0 KiB
HLSL
cbuffer cbuffer_uniforms : register(b0, space0) {
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uint4 uniforms[1];
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};
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struct VertexOutputs {
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float2 texcoords;
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float4 position;
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};
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struct tint_symbol_1 {
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uint VertexIndex : SV_VertexID;
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};
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struct tint_symbol_2 {
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float2 texcoords : TEXCOORD0;
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float4 position : SV_Position;
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};
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VertexOutputs vs_main_inner(uint VertexIndex) {
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float2 texcoord[3] = {float2(-0.5f, 0.0f), float2(1.5f, 0.0f), float2(0.5f, 2.0f)};
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VertexOutputs output = (VertexOutputs)0;
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output.position = float4(((texcoord[VertexIndex] * 2.0f) - float2(1.0f, 1.0f)), 0.0f, 1.0f);
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bool flipY = (asfloat(uniforms[0].y) < 0.0f);
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if (flipY) {
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output.texcoords = ((((texcoord[VertexIndex] * asfloat(uniforms[0].xy)) + asfloat(uniforms[0].zw)) * float2(1.0f, -1.0f)) + float2(0.0f, 1.0f));
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} else {
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output.texcoords = ((((texcoord[VertexIndex] * float2(1.0f, -1.0f)) + float2(0.0f, 1.0f)) * asfloat(uniforms[0].xy)) + asfloat(uniforms[0].zw));
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}
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return output;
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}
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tint_symbol_2 vs_main(tint_symbol_1 tint_symbol) {
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const VertexOutputs inner_result = vs_main_inner(tint_symbol.VertexIndex);
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tint_symbol_2 wrapper_result = (tint_symbol_2)0;
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wrapper_result.texcoords = inner_result.texcoords;
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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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SamplerState mySampler : register(s1, space0);
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Texture2D<float4> myTexture : register(t2, space0);
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struct tint_symbol_4 {
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float2 texcoord : TEXCOORD0;
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};
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struct tint_symbol_5 {
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float4 value : SV_Target0;
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};
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float4 fs_main_inner(float2 texcoord) {
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float2 clampedTexcoord = clamp(texcoord, float2(0.0f, 0.0f), float2(1.0f, 1.0f));
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if (!(all((clampedTexcoord == texcoord)))) {
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discard;
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}
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float4 srcColor = myTexture.Sample(mySampler, texcoord);
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return srcColor;
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}
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tint_symbol_5 fs_main(tint_symbol_4 tint_symbol_3) {
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const float4 inner_result_1 = fs_main_inner(tint_symbol_3.texcoord);
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tint_symbol_5 wrapper_result_1 = (tint_symbol_5)0;
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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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